Revert "Move inputservice over to frameworks/native"

This reverts commit 89e5c7ebb37fabc4368e87e17a502db62598bd61.

16 files changed, 17144 insertions, 6 deletions

diff --git a/libs/input/Android.mk b/libs/input/Android.mk
index 6011ff0..eb2bebe 100644
--- a/libs/input/Android.mk
+++ b/libs/input/Android.mk
@@ -17,23 +17,30 @@ LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
+    EventHub.cpp \
+    InputApplication.cpp \
+    InputDispatcher.cpp \
+    InputListener.cpp \
+    InputManager.cpp \
+    InputReader.cpp \
+    InputWindow.cpp \
     PointerController.cpp \
     SpriteController.cpp
 
 LOCAL_SHARED_LIBRARIES := \
     libcutils \
     liblog \
+    libandroidfw \
     libutils \
+    libhardware \
+    libhardware_legacy \
     libskia \
     libgui \
     libui \
-	libinput \
-	libinputflinger
+    libinput
 
 LOCAL_C_INCLUDES := \
-    external/skia/include/core \
-    frameworks/native/services
-
+    external/skia/include/core
 
 LOCAL_CFLAGS += -Wno-unused-parameter
 
diff --git a/libs/input/EventHub.cpp b/libs/input/EventHub.cpp
new file mode 100644
index 0000000..e2efd17
--- /dev/null
+++ b/libs/input/EventHub.cpp
@@ -0,0 +1,1669 @@
+/*
+ * Copyright (C) 2005 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "EventHub"
+
+// #define LOG_NDEBUG 0
+
+#include "EventHub.h"
+
+#include <hardware_legacy/power.h>
+
+#include <cutils/properties.h>
+#include <utils/Log.h>
+#include <utils/Timers.h>
+#include <utils/threads.h>
+#include <utils/Errors.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <memory.h>
+#include <errno.h>
+#include <assert.h>
+
+#include <input/KeyLayoutMap.h>
+#include <input/KeyCharacterMap.h>
+#include <input/VirtualKeyMap.h>
+
+#include <string.h>
+#include <stdint.h>
+#include <dirent.h>
+
+#include <sys/inotify.h>
+#include <sys/epoll.h>
+#include <sys/ioctl.h>
+#include <sys/limits.h>
+#include <sys/sha1.h>
+#include <sys/utsname.h>
+
+/* this macro is used to tell if "bit" is set in "array"
+ * it selects a byte from the array, and does a boolean AND
+ * operation with a byte that only has the relevant bit set.
+ * eg. to check for the 12th bit, we do (array[1] & 1<<4)
+ */
+#define test_bit(bit, array)    (array[bit/8] & (1<<(bit%8)))
+
+/* this macro computes the number of bytes needed to represent a bit array of the specified size */
+#define sizeof_bit_array(bits)  ((bits + 7) / 8)
+
+#define INDENT "  "
+#define INDENT2 "    "
+#define INDENT3 "      "
+
+namespace android {
+
+static const char *WAKE_LOCK_ID = "KeyEvents";
+static const char *DEVICE_PATH = "/dev/input";
+
+/* return the larger integer */
+static inline int max(int v1, int v2)
+{
+    return (v1 > v2) ? v1 : v2;
+}
+
+static inline const char* toString(bool value) {
+    return value ? "true" : "false";
+}
+
+static String8 sha1(const String8& in) {
+    SHA1_CTX ctx;
+    SHA1Init(&ctx);
+    SHA1Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size());
+    u_char digest[SHA1_DIGEST_LENGTH];
+    SHA1Final(digest, &ctx);
+
+    String8 out;
+    for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) {
+        out.appendFormat("%02x", digest[i]);
+    }
+    return out;
+}
+
+static void getLinuxRelease(int* major, int* minor) {
+    struct utsname info;
+    if (uname(&info) || sscanf(info.release, "%d.%d", major, minor) <= 0) {
+        *major = 0, *minor = 0;
+        ALOGE("Could not get linux version: %s", strerror(errno));
+    }
+}
+
+// --- Global Functions ---
+
+uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) {
+    // Touch devices get dibs on touch-related axes.
+    if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) {
+        switch (axis) {
+        case ABS_X:
+        case ABS_Y:
+        case ABS_PRESSURE:
+        case ABS_TOOL_WIDTH:
+        case ABS_DISTANCE:
+        case ABS_TILT_X:
+        case ABS_TILT_Y:
+        case ABS_MT_SLOT:
+        case ABS_MT_TOUCH_MAJOR:
+        case ABS_MT_TOUCH_MINOR:
+        case ABS_MT_WIDTH_MAJOR:
+        case ABS_MT_WIDTH_MINOR:
+        case ABS_MT_ORIENTATION:
+        case ABS_MT_POSITION_X:
+        case ABS_MT_POSITION_Y:
+        case ABS_MT_TOOL_TYPE:
+        case ABS_MT_BLOB_ID:
+        case ABS_MT_TRACKING_ID:
+        case ABS_MT_PRESSURE:
+        case ABS_MT_DISTANCE:
+            return INPUT_DEVICE_CLASS_TOUCH;
+        }
+    }
+
+    // Joystick devices get the rest.
+    return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK;
+}
+
+// --- EventHub::Device ---
+
+EventHub::Device::Device(int fd, int32_t id, const String8& path,
+        const InputDeviceIdentifier& identifier) :
+        next(NULL),
+        fd(fd), id(id), path(path), identifier(identifier),
+        classes(0), configuration(NULL), virtualKeyMap(NULL),
+        ffEffectPlaying(false), ffEffectId(-1), controllerNumber(0),
+        timestampOverrideSec(0), timestampOverrideUsec(0) {
+    memset(keyBitmask, 0, sizeof(keyBitmask));
+    memset(absBitmask, 0, sizeof(absBitmask));
+    memset(relBitmask, 0, sizeof(relBitmask));
+    memset(swBitmask, 0, sizeof(swBitmask));
+    memset(ledBitmask, 0, sizeof(ledBitmask));
+    memset(ffBitmask, 0, sizeof(ffBitmask));
+    memset(propBitmask, 0, sizeof(propBitmask));
+}
+
+EventHub::Device::~Device() {
+    close();
+    delete configuration;
+    delete virtualKeyMap;
+}
+
+void EventHub::Device::close() {
+    if (fd >= 0) {
+        ::close(fd);
+        fd = -1;
+    }
+}
+
+
+// --- EventHub ---
+
+const uint32_t EventHub::EPOLL_ID_INOTIFY;
+const uint32_t EventHub::EPOLL_ID_WAKE;
+const int EventHub::EPOLL_SIZE_HINT;
+const int EventHub::EPOLL_MAX_EVENTS;
+
+EventHub::EventHub(void) :
+        mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1), mControllerNumbers(),
+        mOpeningDevices(0), mClosingDevices(0),
+        mNeedToSendFinishedDeviceScan(false),
+        mNeedToReopenDevices(false), mNeedToScanDevices(true),
+        mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) {
+    acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
+
+    mEpollFd = epoll_create(EPOLL_SIZE_HINT);
+    LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance.  errno=%d", errno);
+
+    mINotifyFd = inotify_init();
+    int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE);
+    LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s.  errno=%d",
+            DEVICE_PATH, errno);
+
+    struct epoll_event eventItem;
+    memset(&eventItem, 0, sizeof(eventItem));
+    eventItem.events = EPOLLIN;
+    eventItem.data.u32 = EPOLL_ID_INOTIFY;
+    result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem);
+    LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance.  errno=%d", errno);
+
+    int wakeFds[2];
+    result = pipe(wakeFds);
+    LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe.  errno=%d", errno);
+
+    mWakeReadPipeFd = wakeFds[0];
+    mWakeWritePipeFd = wakeFds[1];
+
+    result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK);
+    LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking.  errno=%d",
+            errno);
+
+    result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK);
+    LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking.  errno=%d",
+            errno);
+
+    eventItem.data.u32 = EPOLL_ID_WAKE;
+    result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem);
+    LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance.  errno=%d",
+            errno);
+
+    int major, minor;
+    getLinuxRelease(&major, &minor);
+    // EPOLLWAKEUP was introduced in kernel 3.5
+    mUsingEpollWakeup = major > 3 || (major == 3 && minor >= 5);
+}
+
+EventHub::~EventHub(void) {
+    closeAllDevicesLocked();
+
+    while (mClosingDevices) {
+        Device* device = mClosingDevices;
+        mClosingDevices = device->next;
+        delete device;
+    }
+
+    ::close(mEpollFd);
+    ::close(mINotifyFd);
+    ::close(mWakeReadPipeFd);
+    ::close(mWakeWritePipeFd);
+
+    release_wake_lock(WAKE_LOCK_ID);
+}
+
+InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device == NULL) return InputDeviceIdentifier();
+    return device->identifier;
+}
+
+uint32_t EventHub::getDeviceClasses(int32_t deviceId) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device == NULL) return 0;
+    return device->classes;
+}
+
+int32_t EventHub::getDeviceControllerNumber(int32_t deviceId) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device == NULL) return 0;
+    return device->controllerNumber;
+}
+
+void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device && device->configuration) {
+        *outConfiguration = *device->configuration;
+    } else {
+        outConfiguration->clear();
+    }
+}
+
+status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
+        RawAbsoluteAxisInfo* outAxisInfo) const {
+    outAxisInfo->clear();
+
+    if (axis >= 0 && axis <= ABS_MAX) {
+        AutoMutex _l(mLock);
+
+        Device* device = getDeviceLocked(deviceId);
+        if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
+            struct input_absinfo info;
+            if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
+                ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
+                     axis, device->identifier.name.string(), device->fd, errno);
+                return -errno;
+            }
+
+            if (info.minimum != info.maximum) {
+                outAxisInfo->valid = true;
+                outAxisInfo->minValue = info.minimum;
+                outAxisInfo->maxValue = info.maximum;
+                outAxisInfo->flat = info.flat;
+                outAxisInfo->fuzz = info.fuzz;
+                outAxisInfo->resolution = info.resolution;
+            }
+            return OK;
+        }
+    }
+    return -1;
+}
+
+bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
+    if (axis >= 0 && axis <= REL_MAX) {
+        AutoMutex _l(mLock);
+
+        Device* device = getDeviceLocked(deviceId);
+        if (device) {
+            return test_bit(axis, device->relBitmask);
+        }
+    }
+    return false;
+}
+
+bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
+    if (property >= 0 && property <= INPUT_PROP_MAX) {
+        AutoMutex _l(mLock);
+
+        Device* device = getDeviceLocked(deviceId);
+        if (device) {
+            return test_bit(property, device->propBitmask);
+        }
+    }
+    return false;
+}
+
+int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
+    if (scanCode >= 0 && scanCode <= KEY_MAX) {
+        AutoMutex _l(mLock);
+
+        Device* device = getDeviceLocked(deviceId);
+        if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) {
+            uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
+            memset(keyState, 0, sizeof(keyState));
+            if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
+                return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
+            }
+        }
+    }
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
+    AutoMutex _l(mLock);
+
+    Device* device = getDeviceLocked(deviceId);
+    if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) {
+        Vector<int32_t> scanCodes;
+        device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
+        if (scanCodes.size() != 0) {
+            uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
+            memset(keyState, 0, sizeof(keyState));
+            if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
+                for (size_t i = 0; i < scanCodes.size(); i++) {
+                    int32_t sc = scanCodes.itemAt(i);
+                    if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) {
+                        return AKEY_STATE_DOWN;
+                    }
+                }
+                return AKEY_STATE_UP;
+            }
+        }
+    }
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
+    if (sw >= 0 && sw <= SW_MAX) {
+        AutoMutex _l(mLock);
+
+        Device* device = getDeviceLocked(deviceId);
+        if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) {
+            uint8_t swState[sizeof_bit_array(SW_MAX + 1)];
+            memset(swState, 0, sizeof(swState));
+            if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) {
+                return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
+            }
+        }
+    }
+    return AKEY_STATE_UNKNOWN;
+}
+
+status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const {
+    *outValue = 0;
+
+    if (axis >= 0 && axis <= ABS_MAX) {
+        AutoMutex _l(mLock);
+
+        Device* device = getDeviceLocked(deviceId);
+        if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
+            struct input_absinfo info;
+            if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
+                ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
+                     axis, device->identifier.name.string(), device->fd, errno);
+                return -errno;
+            }
+
+            *outValue = info.value;
+            return OK;
+        }
+    }
+    return -1;
+}
+
+bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) const {
+    AutoMutex _l(mLock);
+
+    Device* device = getDeviceLocked(deviceId);
+    if (device && device->keyMap.haveKeyLayout()) {
+        Vector<int32_t> scanCodes;
+        for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
+            scanCodes.clear();
+
+            status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(
+                    keyCodes[codeIndex], &scanCodes);
+            if (! err) {
+                // check the possible scan codes identified by the layout map against the
+                // map of codes actually emitted by the driver
+                for (size_t sc = 0; sc < scanCodes.size(); sc++) {
+                    if (test_bit(scanCodes[sc], device->keyBitmask)) {
+                        outFlags[codeIndex] = 1;
+                        break;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+    return false;
+}
+
+status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
+        int32_t* outKeycode, uint32_t* outFlags) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+
+    if (device) {
+        // Check the key character map first.
+        sp<KeyCharacterMap> kcm = device->getKeyCharacterMap();
+        if (kcm != NULL) {
+            if (!kcm->mapKey(scanCode, usageCode, outKeycode)) {
+                *outFlags = 0;
+                return NO_ERROR;
+            }
+        }
+
+        // Check the key layout next.
+        if (device->keyMap.haveKeyLayout()) {
+            if (!device->keyMap.keyLayoutMap->mapKey(
+                    scanCode, usageCode, outKeycode, outFlags)) {
+                return NO_ERROR;
+            }
+        }
+    }
+
+    *outKeycode = 0;
+    *outFlags = 0;
+    return NAME_NOT_FOUND;
+}
+
+status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+
+    if (device && device->keyMap.haveKeyLayout()) {
+        status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
+        if (err == NO_ERROR) {
+            return NO_ERROR;
+        }
+    }
+
+    return NAME_NOT_FOUND;
+}
+
+void EventHub::setExcludedDevices(const Vector<String8>& devices) {
+    AutoMutex _l(mLock);
+
+    mExcludedDevices = devices;
+}
+
+bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device && scanCode >= 0 && scanCode <= KEY_MAX) {
+        if (test_bit(scanCode, device->keyBitmask)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool EventHub::hasLed(int32_t deviceId, int32_t led) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    int32_t sc;
+    if (device && mapLed(device, led, &sc) == NO_ERROR) {
+        if (test_bit(sc, device->ledBitmask)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    setLedStateLocked(device, led, on);
+}
+
+void EventHub::setLedStateLocked(Device* device, int32_t led, bool on) {
+    int32_t sc;
+    if (device && !device->isVirtual() && mapLed(device, led, &sc) != NAME_NOT_FOUND) {
+        struct input_event ev;
+        ev.time.tv_sec = 0;
+        ev.time.tv_usec = 0;
+        ev.type = EV_LED;
+        ev.code = sc;
+        ev.value = on ? 1 : 0;
+
+        ssize_t nWrite;
+        do {
+            nWrite = write(device->fd, &ev, sizeof(struct input_event));
+        } while (nWrite == -1 && errno == EINTR);
+    }
+}
+
+void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
+        Vector<VirtualKeyDefinition>& outVirtualKeys) const {
+    outVirtualKeys.clear();
+
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device && device->virtualKeyMap) {
+        outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys());
+    }
+}
+
+sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device) {
+        return device->getKeyCharacterMap();
+    }
+    return NULL;
+}
+
+bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId,
+        const sp<KeyCharacterMap>& map) {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device) {
+        if (map != device->overlayKeyMap) {
+            device->overlayKeyMap = map;
+            device->combinedKeyMap = KeyCharacterMap::combine(
+                    device->keyMap.keyCharacterMap, map);
+            return true;
+        }
+    }
+    return false;
+}
+
+static String8 generateDescriptor(InputDeviceIdentifier& identifier) {
+    String8 rawDescriptor;
+    rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor,
+            identifier.product);
+    // TODO add handling for USB devices to not uniqueify kbs that show up twice
+    if (!identifier.uniqueId.isEmpty()) {
+        rawDescriptor.append("uniqueId:");
+        rawDescriptor.append(identifier.uniqueId);
+    } else if (identifier.nonce != 0) {
+        rawDescriptor.appendFormat("nonce:%04x", identifier.nonce);
+    }
+
+    if (identifier.vendor == 0 && identifier.product == 0) {
+        // If we don't know the vendor and product id, then the device is probably
+        // built-in so we need to rely on other information to uniquely identify
+        // the input device.  Usually we try to avoid relying on the device name or
+        // location but for built-in input device, they are unlikely to ever change.
+        if (!identifier.name.isEmpty()) {
+            rawDescriptor.append("name:");
+            rawDescriptor.append(identifier.name);
+        } else if (!identifier.location.isEmpty()) {
+            rawDescriptor.append("location:");
+            rawDescriptor.append(identifier.location);
+        }
+    }
+    identifier.descriptor = sha1(rawDescriptor);
+    return rawDescriptor;
+}
+
+void EventHub::assignDescriptorLocked(InputDeviceIdentifier& identifier) {
+    // Compute a device descriptor that uniquely identifies the device.
+    // The descriptor is assumed to be a stable identifier.  Its value should not
+    // change between reboots, reconnections, firmware updates or new releases
+    // of Android. In practice we sometimes get devices that cannot be uniquely
+    // identified. In this case we enforce uniqueness between connected devices.
+    // Ideally, we also want the descriptor to be short and relatively opaque.
+
+    identifier.nonce = 0;
+    String8 rawDescriptor = generateDescriptor(identifier);
+    if (identifier.uniqueId.isEmpty()) {
+        // If it didn't have a unique id check for conflicts and enforce
+        // uniqueness if necessary.
+        while(getDeviceByDescriptorLocked(identifier.descriptor) != NULL) {
+            identifier.nonce++;
+            rawDescriptor = generateDescriptor(identifier);
+        }
+    }
+    ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(),
+            identifier.descriptor.string());
+}
+
+void EventHub::vibrate(int32_t deviceId, nsecs_t duration) {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device && !device->isVirtual()) {
+        ff_effect effect;
+        memset(&effect, 0, sizeof(effect));
+        effect.type = FF_RUMBLE;
+        effect.id = device->ffEffectId;
+        effect.u.rumble.strong_magnitude = 0xc000;
+        effect.u.rumble.weak_magnitude = 0xc000;
+        effect.replay.length = (duration + 999999LL) / 1000000LL;
+        effect.replay.delay = 0;
+        if (ioctl(device->fd, EVIOCSFF, &effect)) {
+            ALOGW("Could not upload force feedback effect to device %s due to error %d.",
+                    device->identifier.name.string(), errno);
+            return;
+        }
+        device->ffEffectId = effect.id;
+
+        struct input_event ev;
+        ev.time.tv_sec = 0;
+        ev.time.tv_usec = 0;
+        ev.type = EV_FF;
+        ev.code = device->ffEffectId;
+        ev.value = 1;
+        if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
+            ALOGW("Could not start force feedback effect on device %s due to error %d.",
+                    device->identifier.name.string(), errno);
+            return;
+        }
+        device->ffEffectPlaying = true;
+    }
+}
+
+void EventHub::cancelVibrate(int32_t deviceId) {
+    AutoMutex _l(mLock);
+    Device* device = getDeviceLocked(deviceId);
+    if (device && !device->isVirtual()) {
+        if (device->ffEffectPlaying) {
+            device->ffEffectPlaying = false;
+
+            struct input_event ev;
+            ev.time.tv_sec = 0;
+            ev.time.tv_usec = 0;
+            ev.type = EV_FF;
+            ev.code = device->ffEffectId;
+            ev.value = 0;
+            if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
+                ALOGW("Could not stop force feedback effect on device %s due to error %d.",
+                        device->identifier.name.string(), errno);
+                return;
+            }
+        }
+    }
+}
+
+EventHub::Device* EventHub::getDeviceByDescriptorLocked(String8& descriptor) const {
+    size_t size = mDevices.size();
+    for (size_t i = 0; i < size; i++) {
+        Device* device = mDevices.valueAt(i);
+        if (descriptor.compare(device->identifier.descriptor) == 0) {
+            return device;
+        }
+    }
+    return NULL;
+}
+
+EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
+    if (deviceId == BUILT_IN_KEYBOARD_ID) {
+        deviceId = mBuiltInKeyboardId;
+    }
+    ssize_t index = mDevices.indexOfKey(deviceId);
+    return index >= 0 ? mDevices.valueAt(index) : NULL;
+}
+
+EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        Device* device = mDevices.valueAt(i);
+        if (device->path == devicePath) {
+            return device;
+        }
+    }
+    return NULL;
+}
+
+size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) {
+    ALOG_ASSERT(bufferSize >= 1);
+
+    AutoMutex _l(mLock);
+
+    struct input_event readBuffer[bufferSize];
+
+    RawEvent* event = buffer;
+    size_t capacity = bufferSize;
+    bool awoken = false;
+    for (;;) {
+        nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+
+        // Reopen input devices if needed.
+        if (mNeedToReopenDevices) {
+            mNeedToReopenDevices = false;
+
+            ALOGI("Reopening all input devices due to a configuration change.");
+
+            closeAllDevicesLocked();
+            mNeedToScanDevices = true;
+            break; // return to the caller before we actually rescan
+        }
+
+        // Report any devices that had last been added/removed.
+        while (mClosingDevices) {
+            Device* device = mClosingDevices;
+            ALOGV("Reporting device closed: id=%d, name=%s\n",
+                 device->id, device->path.string());
+            mClosingDevices = device->next;
+            event->when = now;
+            event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id;
+            event->type = DEVICE_REMOVED;
+            event += 1;
+            delete device;
+            mNeedToSendFinishedDeviceScan = true;
+            if (--capacity == 0) {
+                break;
+            }
+        }
+
+        if (mNeedToScanDevices) {
+            mNeedToScanDevices = false;
+            scanDevicesLocked();
+            mNeedToSendFinishedDeviceScan = true;
+        }
+
+        while (mOpeningDevices != NULL) {
+            Device* device = mOpeningDevices;
+            ALOGV("Reporting device opened: id=%d, name=%s\n",
+                 device->id, device->path.string());
+            mOpeningDevices = device->next;
+            event->when = now;
+            event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
+            event->type = DEVICE_ADDED;
+            event += 1;
+            mNeedToSendFinishedDeviceScan = true;
+            if (--capacity == 0) {
+                break;
+            }
+        }
+
+        if (mNeedToSendFinishedDeviceScan) {
+            mNeedToSendFinishedDeviceScan = false;
+            event->when = now;
+            event->type = FINISHED_DEVICE_SCAN;
+            event += 1;
+            if (--capacity == 0) {
+                break;
+            }
+        }
+
+        // Grab the next input event.
+        bool deviceChanged = false;
+        while (mPendingEventIndex < mPendingEventCount) {
+            const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++];
+            if (eventItem.data.u32 == EPOLL_ID_INOTIFY) {
+                if (eventItem.events & EPOLLIN) {
+                    mPendingINotify = true;
+                } else {
+                    ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events);
+                }
+                continue;
+            }
+
+            if (eventItem.data.u32 == EPOLL_ID_WAKE) {
+                if (eventItem.events & EPOLLIN) {
+                    ALOGV("awoken after wake()");
+                    awoken = true;
+                    char buffer[16];
+                    ssize_t nRead;
+                    do {
+                        nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer));
+                    } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer));
+                } else {
+                    ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.",
+                            eventItem.events);
+                }
+                continue;
+            }
+
+            ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32);
+            if (deviceIndex < 0) {
+                ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.",
+                        eventItem.events, eventItem.data.u32);
+                continue;
+            }
+
+            Device* device = mDevices.valueAt(deviceIndex);
+            if (eventItem.events & EPOLLIN) {
+                int32_t readSize = read(device->fd, readBuffer,
+                        sizeof(struct input_event) * capacity);
+                if (readSize == 0 || (readSize < 0 && errno == ENODEV)) {
+                    // Device was removed before INotify noticed.
+                    ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d "
+                            "capacity: %d errno: %d)\n",
+                            device->fd, readSize, bufferSize, capacity, errno);
+                    deviceChanged = true;
+                    closeDeviceLocked(device);
+                } else if (readSize < 0) {
+                    if (errno != EAGAIN && errno != EINTR) {
+                        ALOGW("could not get event (errno=%d)", errno);
+                    }
+                } else if ((readSize % sizeof(struct input_event)) != 0) {
+                    ALOGE("could not get event (wrong size: %d)", readSize);
+                } else {
+                    int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
+
+                    size_t count = size_t(readSize) / sizeof(struct input_event);
+                    for (size_t i = 0; i < count; i++) {
+                        struct input_event& iev = readBuffer[i];
+                        ALOGV("%s got: time=%d.%06d, type=%d, code=%d, value=%d",
+                                device->path.string(),
+                                (int) iev.time.tv_sec, (int) iev.time.tv_usec,
+                                iev.type, iev.code, iev.value);
+
+                        // Some input devices may have a better concept of the time
+                        // when an input event was actually generated than the kernel
+                        // which simply timestamps all events on entry to evdev.
+                        // This is a custom Android extension of the input protocol
+                        // mainly intended for use with uinput based device drivers.
+                        if (iev.type == EV_MSC) {
+                            if (iev.code == MSC_ANDROID_TIME_SEC) {
+                                device->timestampOverrideSec = iev.value;
+                                continue;
+                            } else if (iev.code == MSC_ANDROID_TIME_USEC) {
+                                device->timestampOverrideUsec = iev.value;
+                                continue;
+                            }
+                        }
+                        if (device->timestampOverrideSec || device->timestampOverrideUsec) {
+                            iev.time.tv_sec = device->timestampOverrideSec;
+                            iev.time.tv_usec = device->timestampOverrideUsec;
+                            if (iev.type == EV_SYN && iev.code == SYN_REPORT) {
+                                device->timestampOverrideSec = 0;
+                                device->timestampOverrideUsec = 0;
+                            }
+                            ALOGV("applied override time %d.%06d",
+                                    int(iev.time.tv_sec), int(iev.time.tv_usec));
+                        }
+
+#ifdef HAVE_POSIX_CLOCKS
+                        // Use the time specified in the event instead of the current time
+                        // so that downstream code can get more accurate estimates of
+                        // event dispatch latency from the time the event is enqueued onto
+                        // the evdev client buffer.
+                        //
+                        // The event's timestamp fortuitously uses the same monotonic clock
+                        // time base as the rest of Android.  The kernel event device driver
+                        // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts().
+                        // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere
+                        // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a
+                        // system call that also queries ktime_get_ts().
+                        event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL
+                                + nsecs_t(iev.time.tv_usec) * 1000LL;
+                        ALOGV("event time %lld, now %lld", event->when, now);
+
+                        // Bug 7291243: Add a guard in case the kernel generates timestamps
+                        // that appear to be far into the future because they were generated
+                        // using the wrong clock source.
+                        //
+                        // This can happen because when the input device is initially opened
+                        // it has a default clock source of CLOCK_REALTIME.  Any input events
+                        // enqueued right after the device is opened will have timestamps
+                        // generated using CLOCK_REALTIME.  We later set the clock source
+                        // to CLOCK_MONOTONIC but it is already too late.
+                        //
+                        // Invalid input event timestamps can result in ANRs, crashes and
+                        // and other issues that are hard to track down.  We must not let them
+                        // propagate through the system.
+                        //
+                        // Log a warning so that we notice the problem and recover gracefully.
+                        if (event->when >= now + 10 * 1000000000LL) {
+                            // Double-check.  Time may have moved on.
+                            nsecs_t time = systemTime(SYSTEM_TIME_MONOTONIC);
+                            if (event->when > time) {
+                                ALOGW("An input event from %s has a timestamp that appears to "
+                                        "have been generated using the wrong clock source "
+                                        "(expected CLOCK_MONOTONIC): "
+                                        "event time %lld, current time %lld, call time %lld.  "
+                                        "Using current time instead.",
+                                        device->path.string(), event->when, time, now);
+                                event->when = time;
+                            } else {
+                                ALOGV("Event time is ok but failed the fast path and required "
+                                        "an extra call to systemTime: "
+                                        "event time %lld, current time %lld, call time %lld.",
+                                        event->when, time, now);
+                            }
+                        }
+#else
+                        event->when = now;
+#endif
+                        event->deviceId = deviceId;
+                        event->type = iev.type;
+                        event->code = iev.code;
+                        event->value = iev.value;
+                        event += 1;
+                        capacity -= 1;
+                    }
+                    if (capacity == 0) {
+                        // The result buffer is full.  Reset the pending event index
+                        // so we will try to read the device again on the next iteration.
+                        mPendingEventIndex -= 1;
+                        break;
+                    }
+                }
+            } else if (eventItem.events & EPOLLHUP) {
+                ALOGI("Removing device %s due to epoll hang-up event.",
+                        device->identifier.name.string());
+                deviceChanged = true;
+                closeDeviceLocked(device);
+            } else {
+                ALOGW("Received unexpected epoll event 0x%08x for device %s.",
+                        eventItem.events, device->identifier.name.string());
+            }
+        }
+
+        // readNotify() will modify the list of devices so this must be done after
+        // processing all other events to ensure that we read all remaining events
+        // before closing the devices.
+        if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) {
+            mPendingINotify = false;
+            readNotifyLocked();
+            deviceChanged = true;
+        }
+
+        // Report added or removed devices immediately.
+        if (deviceChanged) {
+            continue;
+        }
+
+        // Return now if we have collected any events or if we were explicitly awoken.
+        if (event != buffer || awoken) {
+            break;
+        }
+
+        // Poll for events.  Mind the wake lock dance!
+        // We hold a wake lock at all times except during epoll_wait().  This works due to some
+        // subtle choreography.  When a device driver has pending (unread) events, it acquires
+        // a kernel wake lock.  However, once the last pending event has been read, the device
+        // driver will release the kernel wake lock.  To prevent the system from going to sleep
+        // when this happens, the EventHub holds onto its own user wake lock while the client
+        // is processing events.  Thus the system can only sleep if there are no events
+        // pending or currently being processed.
+        //
+        // The timeout is advisory only.  If the device is asleep, it will not wake just to
+        // service the timeout.
+        mPendingEventIndex = 0;
+
+        mLock.unlock(); // release lock before poll, must be before release_wake_lock
+        release_wake_lock(WAKE_LOCK_ID);
+
+        int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis);
+
+        acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
+        mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock
+
+        if (pollResult == 0) {
+            // Timed out.
+            mPendingEventCount = 0;
+            break;
+        }
+
+        if (pollResult < 0) {
+            // An error occurred.
+            mPendingEventCount = 0;
+
+            // Sleep after errors to avoid locking up the system.
+            // Hopefully the error is transient.
+            if (errno != EINTR) {
+                ALOGW("poll failed (errno=%d)\n", errno);
+                usleep(100000);
+            }
+        } else {
+            // Some events occurred.
+            mPendingEventCount = size_t(pollResult);
+        }
+    }
+
+    // All done, return the number of events we read.
+    return event - buffer;
+}
+
+void EventHub::wake() {
+    ALOGV("wake() called");
+
+    ssize_t nWrite;
+    do {
+        nWrite = write(mWakeWritePipeFd, "W", 1);
+    } while (nWrite == -1 && errno == EINTR);
+
+    if (nWrite != 1 && errno != EAGAIN) {
+        ALOGW("Could not write wake signal, errno=%d", errno);
+    }
+}
+
+void EventHub::scanDevicesLocked() {
+    status_t res = scanDirLocked(DEVICE_PATH);
+    if(res < 0) {
+        ALOGE("scan dir failed for %s\n", DEVICE_PATH);
+    }
+    if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) {
+        createVirtualKeyboardLocked();
+    }
+}
+
+// ----------------------------------------------------------------------------
+
+static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) {
+    const uint8_t* end = array + endIndex;
+    array += startIndex;
+    while (array != end) {
+        if (*(array++) != 0) {
+            return true;
+        }
+    }
+    return false;
+}
+
+static const int32_t GAMEPAD_KEYCODES[] = {
+        AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C,
+        AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z,
+        AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1,
+        AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2,
+        AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR,
+        AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE,
+        AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4,
+        AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8,
+        AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12,
+        AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16,
+};
+
+status_t EventHub::openDeviceLocked(const char *devicePath) {
+    char buffer[80];
+
+    ALOGV("Opening device: %s", devicePath);
+
+    int fd = open(devicePath, O_RDWR | O_CLOEXEC);
+    if(fd < 0) {
+        ALOGE("could not open %s, %s\n", devicePath, strerror(errno));
+        return -1;
+    }
+
+    InputDeviceIdentifier identifier;
+
+    // Get device name.
+    if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
+        //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno));
+    } else {
+        buffer[sizeof(buffer) - 1] = '\0';
+        identifier.name.setTo(buffer);
+    }
+
+    // Check to see if the device is on our excluded list
+    for (size_t i = 0; i < mExcludedDevices.size(); i++) {
+        const String8& item = mExcludedDevices.itemAt(i);
+        if (identifier.name == item) {
+            ALOGI("ignoring event id %s driver %s\n", devicePath, item.string());
+            close(fd);
+            return -1;
+        }
+    }
+
+    // Get device driver version.
+    int driverVersion;
+    if(ioctl(fd, EVIOCGVERSION, &driverVersion)) {
+        ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno));
+        close(fd);
+        return -1;
+    }
+
+    // Get device identifier.
+    struct input_id inputId;
+    if(ioctl(fd, EVIOCGID, &inputId)) {
+        ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno));
+        close(fd);
+        return -1;
+    }
+    identifier.bus = inputId.bustype;
+    identifier.product = inputId.product;
+    identifier.vendor = inputId.vendor;
+    identifier.version = inputId.version;
+
+    // Get device physical location.
+    if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) {
+        //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno));
+    } else {
+        buffer[sizeof(buffer) - 1] = '\0';
+        identifier.location.setTo(buffer);
+    }
+
+    // Get device unique id.
+    if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) {
+        //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno));
+    } else {
+        buffer[sizeof(buffer) - 1] = '\0';
+        identifier.uniqueId.setTo(buffer);
+    }
+
+    // Fill in the descriptor.
+    assignDescriptorLocked(identifier);
+
+    // Make file descriptor non-blocking for use with poll().
+    if (fcntl(fd, F_SETFL, O_NONBLOCK)) {
+        ALOGE("Error %d making device file descriptor non-blocking.", errno);
+        close(fd);
+        return -1;
+    }
+
+    // Allocate device.  (The device object takes ownership of the fd at this point.)
+    int32_t deviceId = mNextDeviceId++;
+    Device* device = new Device(fd, deviceId, String8(devicePath), identifier);
+
+    ALOGV("add device %d: %s\n", deviceId, devicePath);
+    ALOGV("  bus:        %04x\n"
+         "  vendor      %04x\n"
+         "  product     %04x\n"
+         "  version     %04x\n",
+        identifier.bus, identifier.vendor, identifier.product, identifier.version);
+    ALOGV("  name:       \"%s\"\n", identifier.name.string());
+    ALOGV("  location:   \"%s\"\n", identifier.location.string());
+    ALOGV("  unique id:  \"%s\"\n", identifier.uniqueId.string());
+    ALOGV("  descriptor: \"%s\"\n", identifier.descriptor.string());
+    ALOGV("  driver:     v%d.%d.%d\n",
+        driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff);
+
+    // Load the configuration file for the device.
+    loadConfigurationLocked(device);
+
+    // Figure out the kinds of events the device reports.
+    ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask);
+    ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask);
+    ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask);
+    ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask);
+    ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask);
+    ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask);
+    ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask);
+
+    // See if this is a keyboard.  Ignore everything in the button range except for
+    // joystick and gamepad buttons which are handled like keyboards for the most part.
+    bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC))
+            || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK),
+                    sizeof_bit_array(KEY_MAX + 1));
+    bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC),
+                    sizeof_bit_array(BTN_MOUSE))
+            || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK),
+                    sizeof_bit_array(BTN_DIGI));
+    if (haveKeyboardKeys || haveGamepadButtons) {
+        device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
+    }
+
+    // See if this is a cursor device such as a trackball or mouse.
+    if (test_bit(BTN_MOUSE, device->keyBitmask)
+            && test_bit(REL_X, device->relBitmask)
+            && test_bit(REL_Y, device->relBitmask)) {
+        device->classes |= INPUT_DEVICE_CLASS_CURSOR;
+    }
+
+    // See if this is a touch pad.
+    // Is this a new modern multi-touch driver?
+    if (test_bit(ABS_MT_POSITION_X, device->absBitmask)
+            && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) {
+        // Some joysticks such as the PS3 controller report axes that conflict
+        // with the ABS_MT range.  Try to confirm that the device really is
+        // a touch screen.
+        if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) {
+            device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT;
+        }
+    // Is this an old style single-touch driver?
+    } else if (test_bit(BTN_TOUCH, device->keyBitmask)
+            && test_bit(ABS_X, device->absBitmask)
+            && test_bit(ABS_Y, device->absBitmask)) {
+        device->classes |= INPUT_DEVICE_CLASS_TOUCH;
+    }
+
+    // See if this device is a joystick.
+    // Assumes that joysticks always have gamepad buttons in order to distinguish them
+    // from other devices such as accelerometers that also have absolute axes.
+    if (haveGamepadButtons) {
+        uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK;
+        for (int i = 0; i <= ABS_MAX; i++) {
+            if (test_bit(i, device->absBitmask)
+                    && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) {
+                device->classes = assumedClasses;
+                break;
+            }
+        }
+    }
+
+    // Check whether this device has switches.
+    for (int i = 0; i <= SW_MAX; i++) {
+        if (test_bit(i, device->swBitmask)) {
+            device->classes |= INPUT_DEVICE_CLASS_SWITCH;
+            break;
+        }
+    }
+
+    // Check whether this device supports the vibrator.
+    if (test_bit(FF_RUMBLE, device->ffBitmask)) {
+        device->classes |= INPUT_DEVICE_CLASS_VIBRATOR;
+    }
+
+    // Configure virtual keys.
+    if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) {
+        // Load the virtual keys for the touch screen, if any.
+        // We do this now so that we can make sure to load the keymap if necessary.
+        status_t status = loadVirtualKeyMapLocked(device);
+        if (!status) {
+            device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
+        }
+    }
+
+    // Load the key map.
+    // We need to do this for joysticks too because the key layout may specify axes.
+    status_t keyMapStatus = NAME_NOT_FOUND;
+    if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) {
+        // Load the keymap for the device.
+        keyMapStatus = loadKeyMapLocked(device);
+    }
+
+    // Configure the keyboard, gamepad or virtual keyboard.
+    if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) {
+        // Register the keyboard as a built-in keyboard if it is eligible.
+        if (!keyMapStatus
+                && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD
+                && isEligibleBuiltInKeyboard(device->identifier,
+                        device->configuration, &device->keyMap)) {
+            mBuiltInKeyboardId = device->id;
+        }
+
+        // 'Q' key support = cheap test of whether this is an alpha-capable kbd
+        if (hasKeycodeLocked(device, AKEYCODE_Q)) {
+            device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY;
+        }
+
+        // See if this device has a DPAD.
+        if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) &&
+                hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) &&
+                hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) &&
+                hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) &&
+                hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) {
+            device->classes |= INPUT_DEVICE_CLASS_DPAD;
+        }
+
+        // See if this device has a gamepad.
+        for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) {
+            if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) {
+                device->classes |= INPUT_DEVICE_CLASS_GAMEPAD;
+                break;
+            }
+        }
+
+        // Disable kernel key repeat since we handle it ourselves
+        unsigned int repeatRate[] = {0,0};
+        if (ioctl(fd, EVIOCSREP, repeatRate)) {
+            ALOGW("Unable to disable kernel key repeat for %s: %s", devicePath, strerror(errno));
+        }
+    }
+
+    // If the device isn't recognized as something we handle, don't monitor it.
+    if (device->classes == 0) {
+        ALOGV("Dropping device: id=%d, path='%s', name='%s'",
+                deviceId, devicePath, device->identifier.name.string());
+        delete device;
+        return -1;
+    }
+
+    // Determine whether the device is external or internal.
+    if (isExternalDeviceLocked(device)) {
+        device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;
+    }
+
+    if (device->classes & (INPUT_DEVICE_CLASS_JOYSTICK | INPUT_DEVICE_CLASS_GAMEPAD)) {
+        device->controllerNumber = getNextControllerNumberLocked(device);
+        setLedForController(device);
+    }
+
+    // Register with epoll.
+    struct epoll_event eventItem;
+    memset(&eventItem, 0, sizeof(eventItem));
+    eventItem.events = mUsingEpollWakeup ? EPOLLIN : EPOLLIN | EPOLLWAKEUP;
+    eventItem.data.u32 = deviceId;
+    if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
+        ALOGE("Could not add device fd to epoll instance.  errno=%d", errno);
+        delete device;
+        return -1;
+    }
+
+    String8 wakeMechanism("EPOLLWAKEUP");
+    if (!mUsingEpollWakeup) {
+#ifndef EVIOCSSUSPENDBLOCK
+        // uapi headers don't include EVIOCSSUSPENDBLOCK, and future kernels
+        // will use an epoll flag instead, so as long as we want to support
+        // this feature, we need to be prepared to define the ioctl ourselves.
+#define EVIOCSSUSPENDBLOCK _IOW('E', 0x91, int)
+#endif
+        if (ioctl(fd, EVIOCSSUSPENDBLOCK, 1)) {
+            wakeMechanism = "<none>";
+        } else {
+            wakeMechanism = "EVIOCSSUSPENDBLOCK";
+        }
+    }
+
+    // Tell the kernel that we want to use the monotonic clock for reporting timestamps
+    // associated with input events.  This is important because the input system
+    // uses the timestamps extensively and assumes they were recorded using the monotonic
+    // clock.
+    //
+    // In older kernel, before Linux 3.4, there was no way to tell the kernel which
+    // clock to use to input event timestamps.  The standard kernel behavior was to
+    // record a real time timestamp, which isn't what we want.  Android kernels therefore
+    // contained a patch to the evdev_event() function in drivers/input/evdev.c to
+    // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
+    // clock to be used instead of the real time clock.
+    //
+    // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
+    // Therefore, we no longer require the Android-specific kernel patch described above
+    // as long as we make sure to set select the monotonic clock.  We do that here.
+    int clockId = CLOCK_MONOTONIC;
+    bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
+
+    ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
+            "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
+            "wakeMechanism=%s, usingClockIoctl=%s",
+         deviceId, fd, devicePath, device->identifier.name.string(),
+         device->classes,
+         device->configurationFile.string(),
+         device->keyMap.keyLayoutFile.string(),
+         device->keyMap.keyCharacterMapFile.string(),
+         toString(mBuiltInKeyboardId == deviceId),
+         wakeMechanism.string(), toString(usingClockIoctl));
+
+    addDeviceLocked(device);
+    return 0;
+}
+
+void EventHub::createVirtualKeyboardLocked() {
+    InputDeviceIdentifier identifier;
+    identifier.name = "Virtual";
+    identifier.uniqueId = "<virtual>";
+    assignDescriptorLocked(identifier);
+
+    Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier);
+    device->classes = INPUT_DEVICE_CLASS_KEYBOARD
+            | INPUT_DEVICE_CLASS_ALPHAKEY
+            | INPUT_DEVICE_CLASS_DPAD
+            | INPUT_DEVICE_CLASS_VIRTUAL;
+    loadKeyMapLocked(device);
+    addDeviceLocked(device);
+}
+
+void EventHub::addDeviceLocked(Device* device) {
+    mDevices.add(device->id, device);
+    device->next = mOpeningDevices;
+    mOpeningDevices = device;
+}
+
+void EventHub::loadConfigurationLocked(Device* device) {
+    device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier(
+            device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION);
+    if (device->configurationFile.isEmpty()) {
+        ALOGD("No input device configuration file found for device '%s'.",
+                device->identifier.name.string());
+    } else {
+        status_t status = PropertyMap::load(device->configurationFile,
+                &device->configuration);
+        if (status) {
+            ALOGE("Error loading input device configuration file for device '%s'.  "
+                    "Using default configuration.",
+                    device->identifier.name.string());
+        }
+    }
+}
+
+status_t EventHub::loadVirtualKeyMapLocked(Device* device) {
+    // The virtual key map is supplied by the kernel as a system board property file.
+    String8 path;
+    path.append("/sys/board_properties/virtualkeys.");
+    path.append(device->identifier.name);
+    if (access(path.string(), R_OK)) {
+        return NAME_NOT_FOUND;
+    }
+    return VirtualKeyMap::load(path, &device->virtualKeyMap);
+}
+
+status_t EventHub::loadKeyMapLocked(Device* device) {
+    return device->keyMap.load(device->identifier, device->configuration);
+}
+
+bool EventHub::isExternalDeviceLocked(Device* device) {
+    if (device->configuration) {
+        bool value;
+        if (device->configuration->tryGetProperty(String8("device.internal"), value)) {
+            return !value;
+        }
+    }
+    return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH;
+}
+
+int32_t EventHub::getNextControllerNumberLocked(Device* device) {
+    if (mControllerNumbers.isFull()) {
+        ALOGI("Maximum number of controllers reached, assigning controller number 0 to device %s",
+                device->identifier.name.string());
+        return 0;
+    }
+    // Since the controller number 0 is reserved for non-controllers, translate all numbers up by
+    // one
+    return static_cast<int32_t>(mControllerNumbers.markFirstUnmarkedBit() + 1);
+}
+
+void EventHub::releaseControllerNumberLocked(Device* device) {
+    int32_t num = device->controllerNumber;
+    device->controllerNumber= 0;
+    if (num == 0) {
+        return;
+    }
+    mControllerNumbers.clearBit(static_cast<uint32_t>(num - 1));
+}
+
+void EventHub::setLedForController(Device* device) {
+    for (int i = 0; i < MAX_CONTROLLER_LEDS; i++) {
+        setLedStateLocked(device, ALED_CONTROLLER_1 + i, device->controllerNumber == i + 1);
+    }
+}
+
+bool EventHub::hasKeycodeLocked(Device* device, int keycode) const {
+    if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) {
+        return false;
+    }
+    
+    Vector<int32_t> scanCodes;
+    device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
+    const size_t N = scanCodes.size();
+    for (size_t i=0; i<N && i<=KEY_MAX; i++) {
+        int32_t sc = scanCodes.itemAt(i);
+        if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) {
+            return true;
+        }
+    }
+    
+    return false;
+}
+
+status_t EventHub::mapLed(Device* device, int32_t led, int32_t* outScanCode) const {
+    if (!device->keyMap.haveKeyLayout() || !device->ledBitmask) {
+        return NAME_NOT_FOUND;
+    }
+
+    int32_t scanCode;
+    if(device->keyMap.keyLayoutMap->findScanCodeForLed(led, &scanCode) != NAME_NOT_FOUND) {
+        if(scanCode >= 0 && scanCode <= LED_MAX && test_bit(scanCode, device->ledBitmask)) {
+            *outScanCode = scanCode;
+            return NO_ERROR;
+        }
+    }
+    return NAME_NOT_FOUND;
+}
+
+status_t EventHub::closeDeviceByPathLocked(const char *devicePath) {
+    Device* device = getDeviceByPathLocked(devicePath);
+    if (device) {
+        closeDeviceLocked(device);
+        return 0;
+    }
+    ALOGV("Remove device: %s not found, device may already have been removed.", devicePath);
+    return -1;
+}
+
+void EventHub::closeAllDevicesLocked() {
+    while (mDevices.size() > 0) {
+        closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1));
+    }
+}
+
+void EventHub::closeDeviceLocked(Device* device) {
+    ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n",
+         device->path.string(), device->identifier.name.string(), device->id,
+         device->fd, device->classes);
+
+    if (device->id == mBuiltInKeyboardId) {
+        ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
+                device->path.string(), mBuiltInKeyboardId);
+        mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
+    }
+
+    if (!device->isVirtual()) {
+        if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) {
+            ALOGW("Could not remove device fd from epoll instance.  errno=%d", errno);
+        }
+    }
+
+    releaseControllerNumberLocked(device);
+
+    mDevices.removeItem(device->id);
+    device->close();
+
+    // Unlink for opening devices list if it is present.
+    Device* pred = NULL;
+    bool found = false;
+    for (Device* entry = mOpeningDevices; entry != NULL; ) {
+        if (entry == device) {
+            found = true;
+            break;
+        }
+        pred = entry;
+        entry = entry->next;
+    }
+    if (found) {
+        // Unlink the device from the opening devices list then delete it.
+        // We don't need to tell the client that the device was closed because
+        // it does not even know it was opened in the first place.
+        ALOGI("Device %s was immediately closed after opening.", device->path.string());
+        if (pred) {
+            pred->next = device->next;
+        } else {
+            mOpeningDevices = device->next;
+        }
+        delete device;
+    } else {
+        // Link into closing devices list.
+        // The device will be deleted later after we have informed the client.
+        device->next = mClosingDevices;
+        mClosingDevices = device;
+    }
+}
+
+status_t EventHub::readNotifyLocked() {
+    int res;
+    char devname[PATH_MAX];
+    char *filename;
+    char event_buf[512];
+    int event_size;
+    int event_pos = 0;
+    struct inotify_event *event;
+
+    ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd);
+    res = read(mINotifyFd, event_buf, sizeof(event_buf));
+    if(res < (int)sizeof(*event)) {
+        if(errno == EINTR)
+            return 0;
+        ALOGW("could not get event, %s\n", strerror(errno));
+        return -1;
+    }
+    //printf("got %d bytes of event information\n", res);
+
+    strcpy(devname, DEVICE_PATH);
+    filename = devname + strlen(devname);
+    *filename++ = '/';
+
+    while(res >= (int)sizeof(*event)) {
+        event = (struct inotify_event *)(event_buf + event_pos);
+        //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");
+        if(event->len) {
+            strcpy(filename, event->name);
+            if(event->mask & IN_CREATE) {
+                openDeviceLocked(devname);
+            } else {
+                ALOGI("Removing device '%s' due to inotify event\n", devname);
+                closeDeviceByPathLocked(devname);
+            }
+        }
+        event_size = sizeof(*event) + event->len;
+        res -= event_size;
+        event_pos += event_size;
+    }
+    return 0;
+}
+
+status_t EventHub::scanDirLocked(const char *dirname)
+{
+    char devname[PATH_MAX];
+    char *filename;
+    DIR *dir;
+    struct dirent *de;
+    dir = opendir(dirname);
+    if(dir == NULL)
+        return -1;
+    strcpy(devname, dirname);
+    filename = devname + strlen(devname);
+    *filename++ = '/';
+    while((de = readdir(dir))) {
+        if(de->d_name[0] == '.' &&
+           (de->d_name[1] == '\0' ||
+            (de->d_name[1] == '.' && de->d_name[2] == '\0')))
+            continue;
+        strcpy(filename, de->d_name);
+        openDeviceLocked(devname);
+    }
+    closedir(dir);
+    return 0;
+}
+
+void EventHub::requestReopenDevices() {
+    ALOGV("requestReopenDevices() called");
+
+    AutoMutex _l(mLock);
+    mNeedToReopenDevices = true;
+}
+
+void EventHub::dump(String8& dump) {
+    dump.append("Event Hub State:\n");
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId);
+
+        dump.append(INDENT "Devices:\n");
+
+        for (size_t i = 0; i < mDevices.size(); i++) {
+            const Device* device = mDevices.valueAt(i);
+            if (mBuiltInKeyboardId == device->id) {
+                dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n",
+                        device->id, device->identifier.name.string());
+            } else {
+                dump.appendFormat(INDENT2 "%d: %s\n", device->id,
+                        device->identifier.name.string());
+            }
+            dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes);
+            dump.appendFormat(INDENT3 "Path: %s\n", device->path.string());
+            dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string());
+            dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string());
+            dump.appendFormat(INDENT3 "ControllerNumber: %d\n", device->controllerNumber);
+            dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string());
+            dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, "
+                    "product=0x%04x, version=0x%04x\n",
+                    device->identifier.bus, device->identifier.vendor,
+                    device->identifier.product, device->identifier.version);
+            dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n",
+                    device->keyMap.keyLayoutFile.string());
+            dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n",
+                    device->keyMap.keyCharacterMapFile.string());
+            dump.appendFormat(INDENT3 "ConfigurationFile: %s\n",
+                    device->configurationFile.string());
+            dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n",
+                    toString(device->overlayKeyMap != NULL));
+        }
+    } // release lock
+}
+
+void EventHub::monitor() {
+    // Acquire and release the lock to ensure that the event hub has not deadlocked.
+    mLock.lock();
+    mLock.unlock();
+}
+
+
+}; // namespace android
diff --git a/libs/input/EventHub.h b/libs/input/EventHub.h
new file mode 100644
index 0000000..20179ae
--- /dev/null
+++ b/libs/input/EventHub.h
@@ -0,0 +1,457 @@
+/*
+ * Copyright (C) 2005 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+#ifndef _RUNTIME_EVENT_HUB_H
+#define _RUNTIME_EVENT_HUB_H
+
+#include <input/Input.h>
+#include <input/InputDevice.h>
+#include <input/Keyboard.h>
+#include <input/KeyLayoutMap.h>
+#include <input/KeyCharacterMap.h>
+#include <input/VirtualKeyMap.h>
+#include <utils/String8.h>
+#include <utils/threads.h>
+#include <utils/Log.h>
+#include <utils/threads.h>
+#include <utils/List.h>
+#include <utils/Errors.h>
+#include <utils/PropertyMap.h>
+#include <utils/Vector.h>
+#include <utils/KeyedVector.h>
+#include <utils/BitSet.h>
+
+#include <linux/input.h>
+#include <sys/epoll.h>
+
+/* Convenience constants. */
+
+#define BTN_FIRST 0x100  // first button code
+#define BTN_LAST 0x15f   // last button code
+
+/*
+ * These constants are used privately in Android to pass raw timestamps
+ * through evdev from uinput device drivers because there is currently no
+ * other way to transfer this information.  The evdev driver automatically
+ * timestamps all input events with the time they were posted and clobbers
+ * whatever information was passed in.
+ *
+ * For the purposes of this hack, the timestamp is specified in the
+ * CLOCK_MONOTONIC timebase and is split into two EV_MSC events specifying
+ * seconds and microseconds.
+ */
+#define MSC_ANDROID_TIME_SEC 0x6
+#define MSC_ANDROID_TIME_USEC 0x7
+
+namespace android {
+
+enum {
+    // Device id of a special "virtual" keyboard that is always present.
+    VIRTUAL_KEYBOARD_ID = -1,
+    // Device id of the "built-in" keyboard if there is one.
+    BUILT_IN_KEYBOARD_ID = 0,
+};
+
+/*
+ * A raw event as retrieved from the EventHub.
+ */
+struct RawEvent {
+    nsecs_t when;
+    int32_t deviceId;
+    int32_t type;
+    int32_t code;
+    int32_t value;
+};
+
+/* Describes an absolute axis. */
+struct RawAbsoluteAxisInfo {
+    bool valid; // true if the information is valid, false otherwise
+
+    int32_t minValue;  // minimum value
+    int32_t maxValue;  // maximum value
+    int32_t flat;      // center flat position, eg. flat == 8 means center is between -8 and 8
+    int32_t fuzz;      // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise
+    int32_t resolution; // resolution in units per mm or radians per mm
+
+    inline void clear() {
+        valid = false;
+        minValue = 0;
+        maxValue = 0;
+        flat = 0;
+        fuzz = 0;
+        resolution = 0;
+    }
+};
+
+/*
+ * Input device classes.
+ */
+enum {
+    /* The input device is a keyboard or has buttons. */
+    INPUT_DEVICE_CLASS_KEYBOARD      = 0x00000001,
+
+    /* The input device is an alpha-numeric keyboard (not just a dial pad). */
+    INPUT_DEVICE_CLASS_ALPHAKEY      = 0x00000002,
+
+    /* The input device is a touchscreen or a touchpad (either single-touch or multi-touch). */
+    INPUT_DEVICE_CLASS_TOUCH         = 0x00000004,
+
+    /* The input device is a cursor device such as a trackball or mouse. */
+    INPUT_DEVICE_CLASS_CURSOR        = 0x00000008,
+
+    /* The input device is a multi-touch touchscreen. */
+    INPUT_DEVICE_CLASS_TOUCH_MT      = 0x00000010,
+
+    /* The input device is a directional pad (implies keyboard, has DPAD keys). */
+    INPUT_DEVICE_CLASS_DPAD          = 0x00000020,
+
+    /* The input device is a gamepad (implies keyboard, has BUTTON keys). */
+    INPUT_DEVICE_CLASS_GAMEPAD       = 0x00000040,
+
+    /* The input device has switches. */
+    INPUT_DEVICE_CLASS_SWITCH        = 0x00000080,
+
+    /* The input device is a joystick (implies gamepad, has joystick absolute axes). */
+    INPUT_DEVICE_CLASS_JOYSTICK      = 0x00000100,
+
+    /* The input device has a vibrator (supports FF_RUMBLE). */
+    INPUT_DEVICE_CLASS_VIBRATOR      = 0x00000200,
+
+    /* The input device is virtual (not a real device, not part of UI configuration). */
+    INPUT_DEVICE_CLASS_VIRTUAL       = 0x40000000,
+
+    /* The input device is external (not built-in). */
+    INPUT_DEVICE_CLASS_EXTERNAL      = 0x80000000,
+};
+
+/*
+ * Gets the class that owns an axis, in cases where multiple classes might claim
+ * the same axis for different purposes.
+ */
+extern uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses);
+
+/*
+ * Grand Central Station for events.
+ *
+ * The event hub aggregates input events received across all known input
+ * devices on the system, including devices that may be emulated by the simulator
+ * environment.  In addition, the event hub generates fake input events to indicate
+ * when devices are added or removed.
+ *
+ * The event hub provides a stream of input events (via the getEvent function).
+ * It also supports querying the current actual state of input devices such as identifying
+ * which keys are currently down.  Finally, the event hub keeps track of the capabilities of
+ * individual input devices, such as their class and the set of key codes that they support.
+ */
+class EventHubInterface : public virtual RefBase {
+protected:
+    EventHubInterface() { }
+    virtual ~EventHubInterface() { }
+
+public:
+    // Synthetic raw event type codes produced when devices are added or removed.
+    enum {
+        // Sent when a device is added.
+        DEVICE_ADDED = 0x10000000,
+        // Sent when a device is removed.
+        DEVICE_REMOVED = 0x20000000,
+        // Sent when all added/removed devices from the most recent scan have been reported.
+        // This event is always sent at least once.
+        FINISHED_DEVICE_SCAN = 0x30000000,
+
+        FIRST_SYNTHETIC_EVENT = DEVICE_ADDED,
+    };
+
+    virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0;
+
+    virtual InputDeviceIdentifier getDeviceIdentifier(int32_t deviceId) const = 0;
+
+    virtual int32_t getDeviceControllerNumber(int32_t deviceId) const = 0;
+
+    virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const = 0;
+
+    virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+            RawAbsoluteAxisInfo* outAxisInfo) const = 0;
+
+    virtual bool hasRelativeAxis(int32_t deviceId, int axis) const = 0;
+
+    virtual bool hasInputProperty(int32_t deviceId, int property) const = 0;
+
+    virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
+            int32_t* outKeycode, uint32_t* outFlags) const = 0;
+
+    virtual status_t mapAxis(int32_t deviceId, int32_t scanCode,
+            AxisInfo* outAxisInfo) const = 0;
+
+    // Sets devices that are excluded from opening.
+    // This can be used to ignore input devices for sensors.
+    virtual void setExcludedDevices(const Vector<String8>& devices) = 0;
+
+    /*
+     * Wait for events to become available and returns them.
+     * After returning, the EventHub holds onto a wake lock until the next call to getEvent.
+     * This ensures that the device will not go to sleep while the event is being processed.
+     * If the device needs to remain awake longer than that, then the caller is responsible
+     * for taking care of it (say, by poking the power manager user activity timer).
+     *
+     * The timeout is advisory only.  If the device is asleep, it will not wake just to
+     * service the timeout.
+     *
+     * Returns the number of events obtained, or 0 if the timeout expired.
+     */
+    virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) = 0;
+
+    /*
+     * Query current input state.
+     */
+    virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const = 0;
+    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const = 0;
+    virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0;
+    virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis,
+            int32_t* outValue) const = 0;
+
+    /*
+     * Examine key input devices for specific framework keycode support
+     */
+    virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
+            uint8_t* outFlags) const = 0;
+
+    virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const = 0;
+
+    /* LED related functions expect Android LED constants, not scan codes or HID usages */
+    virtual bool hasLed(int32_t deviceId, int32_t led) const = 0;
+    virtual void setLedState(int32_t deviceId, int32_t led, bool on) = 0;
+
+    virtual void getVirtualKeyDefinitions(int32_t deviceId,
+            Vector<VirtualKeyDefinition>& outVirtualKeys) const = 0;
+
+    virtual sp<KeyCharacterMap> getKeyCharacterMap(int32_t deviceId) const = 0;
+    virtual bool setKeyboardLayoutOverlay(int32_t deviceId, const sp<KeyCharacterMap>& map) = 0;
+
+    /* Control the vibrator. */
+    virtual void vibrate(int32_t deviceId, nsecs_t duration) = 0;
+    virtual void cancelVibrate(int32_t deviceId) = 0;
+
+    /* Requests the EventHub to reopen all input devices on the next call to getEvents(). */
+    virtual void requestReopenDevices() = 0;
+
+    /* Wakes up getEvents() if it is blocked on a read. */
+    virtual void wake() = 0;
+
+    /* Dump EventHub state to a string. */
+    virtual void dump(String8& dump) = 0;
+
+    /* Called by the heatbeat to ensures that the reader has not deadlocked. */
+    virtual void monitor() = 0;
+};
+
+class EventHub : public EventHubInterface
+{
+public:
+    EventHub();
+
+    virtual uint32_t getDeviceClasses(int32_t deviceId) const;
+
+    virtual InputDeviceIdentifier getDeviceIdentifier(int32_t deviceId) const;
+
+    virtual int32_t getDeviceControllerNumber(int32_t deviceId) const;
+
+    virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const;
+
+    virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+            RawAbsoluteAxisInfo* outAxisInfo) const;
+
+    virtual bool hasRelativeAxis(int32_t deviceId, int axis) const;
+
+    virtual bool hasInputProperty(int32_t deviceId, int property) const;
+
+    virtual status_t mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
+            int32_t* outKeycode, uint32_t* outFlags) const;
+
+    virtual status_t mapAxis(int32_t deviceId, int32_t scanCode,
+            AxisInfo* outAxisInfo) const;
+
+    virtual void setExcludedDevices(const Vector<String8>& devices);
+
+    virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const;
+    virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const;
+    virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const;
+    virtual status_t getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const;
+
+    virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags) const;
+
+    virtual size_t getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize);
+
+    virtual bool hasScanCode(int32_t deviceId, int32_t scanCode) const;
+    virtual bool hasLed(int32_t deviceId, int32_t led) const;
+    virtual void setLedState(int32_t deviceId, int32_t led, bool on);
+
+    virtual void getVirtualKeyDefinitions(int32_t deviceId,
+            Vector<VirtualKeyDefinition>& outVirtualKeys) const;
+
+    virtual sp<KeyCharacterMap> getKeyCharacterMap(int32_t deviceId) const;
+    virtual bool setKeyboardLayoutOverlay(int32_t deviceId, const sp<KeyCharacterMap>& map);
+
+    virtual void vibrate(int32_t deviceId, nsecs_t duration);
+    virtual void cancelVibrate(int32_t deviceId);
+
+    virtual void requestReopenDevices();
+
+    virtual void wake();
+
+    virtual void dump(String8& dump);
+    virtual void monitor();
+
+protected:
+    virtual ~EventHub();
+
+private:
+    struct Device {
+        Device* next;
+
+        int fd; // may be -1 if device is virtual
+        const int32_t id;
+        const String8 path;
+        const InputDeviceIdentifier identifier;
+
+        uint32_t classes;
+
+        uint8_t keyBitmask[(KEY_MAX + 1) / 8];
+        uint8_t absBitmask[(ABS_MAX + 1) / 8];
+        uint8_t relBitmask[(REL_MAX + 1) / 8];
+        uint8_t swBitmask[(SW_MAX + 1) / 8];
+        uint8_t ledBitmask[(LED_MAX + 1) / 8];
+        uint8_t ffBitmask[(FF_MAX + 1) / 8];
+        uint8_t propBitmask[(INPUT_PROP_MAX + 1) / 8];
+
+        String8 configurationFile;
+        PropertyMap* configuration;
+        VirtualKeyMap* virtualKeyMap;
+        KeyMap keyMap;
+
+        sp<KeyCharacterMap> overlayKeyMap;
+        sp<KeyCharacterMap> combinedKeyMap;
+
+        bool ffEffectPlaying;
+        int16_t ffEffectId; // initially -1
+
+        int32_t controllerNumber;
+
+        int32_t timestampOverrideSec;
+        int32_t timestampOverrideUsec;
+
+        Device(int fd, int32_t id, const String8& path, const InputDeviceIdentifier& identifier);
+        ~Device();
+
+        void close();
+
+        inline bool isVirtual() const { return fd < 0; }
+
+        const sp<KeyCharacterMap>& getKeyCharacterMap() const {
+            if (combinedKeyMap != NULL) {
+                return combinedKeyMap;
+            }
+            return keyMap.keyCharacterMap;
+        }
+    };
+
+    status_t openDeviceLocked(const char *devicePath);
+    void createVirtualKeyboardLocked();
+    void addDeviceLocked(Device* device);
+    void assignDescriptorLocked(InputDeviceIdentifier& identifier);
+
+    status_t closeDeviceByPathLocked(const char *devicePath);
+    void closeDeviceLocked(Device* device);
+    void closeAllDevicesLocked();
+
+    status_t scanDirLocked(const char *dirname);
+    void scanDevicesLocked();
+    status_t readNotifyLocked();
+
+    Device* getDeviceByDescriptorLocked(String8& descriptor) const;
+    Device* getDeviceLocked(int32_t deviceId) const;
+    Device* getDeviceByPathLocked(const char* devicePath) const;
+
+    bool hasKeycodeLocked(Device* device, int keycode) const;
+
+    void loadConfigurationLocked(Device* device);
+    status_t loadVirtualKeyMapLocked(Device* device);
+    status_t loadKeyMapLocked(Device* device);
+
+    bool isExternalDeviceLocked(Device* device);
+
+    int32_t getNextControllerNumberLocked(Device* device);
+    void releaseControllerNumberLocked(Device* device);
+    void setLedForController(Device* device);
+
+    status_t mapLed(Device* device, int32_t led, int32_t* outScanCode) const;
+    void setLedStateLocked(Device* device, int32_t led, bool on);
+
+    // Protect all internal state.
+    mutable Mutex mLock;
+
+    // The actual id of the built-in keyboard, or NO_BUILT_IN_KEYBOARD if none.
+    // EventHub remaps the built-in keyboard to id 0 externally as required by the API.
+    enum {
+        // Must not conflict with any other assigned device ids, including
+        // the virtual keyboard id (-1).
+        NO_BUILT_IN_KEYBOARD = -2,
+    };
+    int32_t mBuiltInKeyboardId;
+
+    int32_t mNextDeviceId;
+
+    BitSet32 mControllerNumbers;
+
+    KeyedVector<int32_t, Device*> mDevices;
+
+    Device *mOpeningDevices;
+    Device *mClosingDevices;
+
+    bool mNeedToSendFinishedDeviceScan;
+    bool mNeedToReopenDevices;
+    bool mNeedToScanDevices;
+    Vector<String8> mExcludedDevices;
+
+    int mEpollFd;
+    int mINotifyFd;
+    int mWakeReadPipeFd;
+    int mWakeWritePipeFd;
+
+    // Ids used for epoll notifications not associated with devices.
+    static const uint32_t EPOLL_ID_INOTIFY = 0x80000001;
+    static const uint32_t EPOLL_ID_WAKE = 0x80000002;
+
+    // Epoll FD list size hint.
+    static const int EPOLL_SIZE_HINT = 8;
+
+    // Maximum number of signalled FDs to handle at a time.
+    static const int EPOLL_MAX_EVENTS = 16;
+
+    // The array of pending epoll events and the index of the next event to be handled.
+    struct epoll_event mPendingEventItems[EPOLL_MAX_EVENTS];
+    size_t mPendingEventCount;
+    size_t mPendingEventIndex;
+    bool mPendingINotify;
+
+    bool mUsingEpollWakeup;
+};
+
+}; // namespace android
+
+#endif // _RUNTIME_EVENT_HUB_H
diff --git a/libs/input/InputApplication.cpp b/libs/input/InputApplication.cpp
new file mode 100644
index 0000000..a99e637
--- /dev/null
+++ b/libs/input/InputApplication.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputApplication"
+
+#include "InputApplication.h"
+
+#include <cutils/log.h>
+
+namespace android {
+
+// --- InputApplicationHandle ---
+
+InputApplicationHandle::InputApplicationHandle() :
+    mInfo(NULL) {
+}
+
+InputApplicationHandle::~InputApplicationHandle() {
+    delete mInfo;
+}
+
+void InputApplicationHandle::releaseInfo() {
+    if (mInfo) {
+        delete mInfo;
+        mInfo = NULL;
+    }
+}
+
+} // namespace android
diff --git a/libs/input/InputApplication.h b/libs/input/InputApplication.h
new file mode 100644
index 0000000..1f5504c
--- /dev/null
+++ b/libs/input/InputApplication.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _UI_INPUT_APPLICATION_H
+#define _UI_INPUT_APPLICATION_H
+
+#include <input/Input.h>
+
+#include <utils/RefBase.h>
+#include <utils/Timers.h>
+#include <utils/String8.h>
+
+namespace android {
+
+/*
+ * Describes the properties of an application that can receive input.
+ */
+struct InputApplicationInfo {
+    String8 name;
+    nsecs_t dispatchingTimeout;
+};
+
+
+/*
+ * Handle for an application that can receive input.
+ *
+ * Used by the native input dispatcher as a handle for the window manager objects
+ * that describe an application.
+ */
+class InputApplicationHandle : public RefBase {
+public:
+    inline const InputApplicationInfo* getInfo() const {
+        return mInfo;
+    }
+
+    inline String8 getName() const {
+        return mInfo ? mInfo->name : String8("<invalid>");
+    }
+
+    inline nsecs_t getDispatchingTimeout(nsecs_t defaultValue) const {
+        return mInfo ? mInfo->dispatchingTimeout : defaultValue;
+    }
+
+    /**
+     * Requests that the state of this object be updated to reflect
+     * the most current available information about the application.
+     *
+     * This method should only be called from within the input dispatcher's
+     * critical section.
+     *
+     * Returns true on success, or false if the handle is no longer valid.
+     */
+    virtual bool updateInfo() = 0;
+
+    /**
+     * Releases the storage used by the associated information when it is
+     * no longer needed.
+     */
+    void releaseInfo();
+
+protected:
+    InputApplicationHandle();
+    virtual ~InputApplicationHandle();
+
+    InputApplicationInfo* mInfo;
+};
+
+} // namespace android
+
+#endif // _UI_INPUT_APPLICATION_H
diff --git a/libs/input/InputDispatcher.cpp b/libs/input/InputDispatcher.cpp
new file mode 100644
index 0000000..8c8e705
--- /dev/null
+++ b/libs/input/InputDispatcher.cpp
@@ -0,0 +1,4473 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputDispatcher"
+#define ATRACE_TAG ATRACE_TAG_INPUT
+
+//#define LOG_NDEBUG 0
+
+// Log detailed debug messages about each inbound event notification to the dispatcher.
+#define DEBUG_INBOUND_EVENT_DETAILS 0
+
+// Log detailed debug messages about each outbound event processed by the dispatcher.
+#define DEBUG_OUTBOUND_EVENT_DETAILS 0
+
+// Log debug messages about the dispatch cycle.
+#define DEBUG_DISPATCH_CYCLE 0
+
+// Log debug messages about registrations.
+#define DEBUG_REGISTRATION 0
+
+// Log debug messages about input event injection.
+#define DEBUG_INJECTION 0
+
+// Log debug messages about input focus tracking.
+#define DEBUG_FOCUS 0
+
+// Log debug messages about the app switch latency optimization.
+#define DEBUG_APP_SWITCH 0
+
+// Log debug messages about hover events.
+#define DEBUG_HOVER 0
+
+#include "InputDispatcher.h"
+
+#include <utils/Trace.h>
+#include <cutils/log.h>
+#include <androidfw/PowerManager.h>
+#include <ui/Region.h>
+
+#include <stddef.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <time.h>
+
+#define INDENT "  "
+#define INDENT2 "    "
+#define INDENT3 "      "
+#define INDENT4 "        "
+
+namespace android {
+
+// Default input dispatching timeout if there is no focused application or paused window
+// from which to determine an appropriate dispatching timeout.
+const nsecs_t DEFAULT_INPUT_DISPATCHING_TIMEOUT = 5000 * 1000000LL; // 5 sec
+
+// Amount of time to allow for all pending events to be processed when an app switch
+// key is on the way.  This is used to preempt input dispatch and drop input events
+// when an application takes too long to respond and the user has pressed an app switch key.
+const nsecs_t APP_SWITCH_TIMEOUT = 500 * 1000000LL; // 0.5sec
+
+// Amount of time to allow for an event to be dispatched (measured since its eventTime)
+// before considering it stale and dropping it.
+const nsecs_t STALE_EVENT_TIMEOUT = 10000 * 1000000LL; // 10sec
+
+// Amount of time to allow touch events to be streamed out to a connection before requiring
+// that the first event be finished.  This value extends the ANR timeout by the specified
+// amount.  For example, if streaming is allowed to get ahead by one second relative to the
+// queue of waiting unfinished events, then ANRs will similarly be delayed by one second.
+const nsecs_t STREAM_AHEAD_EVENT_TIMEOUT = 500 * 1000000LL; // 0.5sec
+
+// Log a warning when an event takes longer than this to process, even if an ANR does not occur.
+const nsecs_t SLOW_EVENT_PROCESSING_WARNING_TIMEOUT = 2000 * 1000000LL; // 2sec
+
+// Number of recent events to keep for debugging purposes.
+const size_t RECENT_QUEUE_MAX_SIZE = 10;
+
+static inline nsecs_t now() {
+    return systemTime(SYSTEM_TIME_MONOTONIC);
+}
+
+static inline const char* toString(bool value) {
+    return value ? "true" : "false";
+}
+
+static inline int32_t getMotionEventActionPointerIndex(int32_t action) {
+    return (action & AMOTION_EVENT_ACTION_POINTER_INDEX_MASK)
+            >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+}
+
+static bool isValidKeyAction(int32_t action) {
+    switch (action) {
+    case AKEY_EVENT_ACTION_DOWN:
+    case AKEY_EVENT_ACTION_UP:
+        return true;
+    default:
+        return false;
+    }
+}
+
+static bool validateKeyEvent(int32_t action) {
+    if (! isValidKeyAction(action)) {
+        ALOGE("Key event has invalid action code 0x%x", action);
+        return false;
+    }
+    return true;
+}
+
+static bool isValidMotionAction(int32_t action, size_t pointerCount) {
+    switch (action & AMOTION_EVENT_ACTION_MASK) {
+    case AMOTION_EVENT_ACTION_DOWN:
+    case AMOTION_EVENT_ACTION_UP:
+    case AMOTION_EVENT_ACTION_CANCEL:
+    case AMOTION_EVENT_ACTION_MOVE:
+    case AMOTION_EVENT_ACTION_OUTSIDE:
+    case AMOTION_EVENT_ACTION_HOVER_ENTER:
+    case AMOTION_EVENT_ACTION_HOVER_MOVE:
+    case AMOTION_EVENT_ACTION_HOVER_EXIT:
+    case AMOTION_EVENT_ACTION_SCROLL:
+        return true;
+    case AMOTION_EVENT_ACTION_POINTER_DOWN:
+    case AMOTION_EVENT_ACTION_POINTER_UP: {
+        int32_t index = getMotionEventActionPointerIndex(action);
+        return index >= 0 && size_t(index) < pointerCount;
+    }
+    default:
+        return false;
+    }
+}
+
+static bool validateMotionEvent(int32_t action, size_t pointerCount,
+        const PointerProperties* pointerProperties) {
+    if (! isValidMotionAction(action, pointerCount)) {
+        ALOGE("Motion event has invalid action code 0x%x", action);
+        return false;
+    }
+    if (pointerCount < 1 || pointerCount > MAX_POINTERS) {
+        ALOGE("Motion event has invalid pointer count %d; value must be between 1 and %d.",
+                pointerCount, MAX_POINTERS);
+        return false;
+    }
+    BitSet32 pointerIdBits;
+    for (size_t i = 0; i < pointerCount; i++) {
+        int32_t id = pointerProperties[i].id;
+        if (id < 0 || id > MAX_POINTER_ID) {
+            ALOGE("Motion event has invalid pointer id %d; value must be between 0 and %d",
+                    id, MAX_POINTER_ID);
+            return false;
+        }
+        if (pointerIdBits.hasBit(id)) {
+            ALOGE("Motion event has duplicate pointer id %d", id);
+            return false;
+        }
+        pointerIdBits.markBit(id);
+    }
+    return true;
+}
+
+static bool isMainDisplay(int32_t displayId) {
+    return displayId == ADISPLAY_ID_DEFAULT || displayId == ADISPLAY_ID_NONE;
+}
+
+static void dumpRegion(String8& dump, const Region& region) {
+    if (region.isEmpty()) {
+        dump.append("<empty>");
+        return;
+    }
+
+    bool first = true;
+    Region::const_iterator cur = region.begin();
+    Region::const_iterator const tail = region.end();
+    while (cur != tail) {
+        if (first) {
+            first = false;
+        } else {
+            dump.append("|");
+        }
+        dump.appendFormat("[%d,%d][%d,%d]", cur->left, cur->top, cur->right, cur->bottom);
+        cur++;
+    }
+}
+
+
+// --- InputDispatcher ---
+
+InputDispatcher::InputDispatcher(const sp<InputDispatcherPolicyInterface>& policy) :
+    mPolicy(policy),
+    mPendingEvent(NULL), mAppSwitchSawKeyDown(false), mAppSwitchDueTime(LONG_LONG_MAX),
+    mNextUnblockedEvent(NULL),
+    mDispatchEnabled(false), mDispatchFrozen(false), mInputFilterEnabled(false),
+    mInputTargetWaitCause(INPUT_TARGET_WAIT_CAUSE_NONE) {
+    mLooper = new Looper(false);
+
+    mKeyRepeatState.lastKeyEntry = NULL;
+
+    policy->getDispatcherConfiguration(&mConfig);
+}
+
+InputDispatcher::~InputDispatcher() {
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        resetKeyRepeatLocked();
+        releasePendingEventLocked();
+        drainInboundQueueLocked();
+    }
+
+    while (mConnectionsByFd.size() != 0) {
+        unregisterInputChannel(mConnectionsByFd.valueAt(0)->inputChannel);
+    }
+}
+
+void InputDispatcher::dispatchOnce() {
+    nsecs_t nextWakeupTime = LONG_LONG_MAX;
+    { // acquire lock
+        AutoMutex _l(mLock);
+        mDispatcherIsAliveCondition.broadcast();
+
+        // Run a dispatch loop if there are no pending commands.
+        // The dispatch loop might enqueue commands to run afterwards.
+        if (!haveCommandsLocked()) {
+            dispatchOnceInnerLocked(&nextWakeupTime);
+        }
+
+        // Run all pending commands if there are any.
+        // If any commands were run then force the next poll to wake up immediately.
+        if (runCommandsLockedInterruptible()) {
+            nextWakeupTime = LONG_LONG_MIN;
+        }
+    } // release lock
+
+    // Wait for callback or timeout or wake.  (make sure we round up, not down)
+    nsecs_t currentTime = now();
+    int timeoutMillis = toMillisecondTimeoutDelay(currentTime, nextWakeupTime);
+    mLooper->pollOnce(timeoutMillis);
+}
+
+void InputDispatcher::dispatchOnceInnerLocked(nsecs_t* nextWakeupTime) {
+    nsecs_t currentTime = now();
+
+    // Reset the key repeat timer whenever we disallow key events, even if the next event
+    // is not a key.  This is to ensure that we abort a key repeat if the device is just coming
+    // out of sleep.
+    if (!mPolicy->isKeyRepeatEnabled()) {
+        resetKeyRepeatLocked();
+    }
+
+    // If dispatching is frozen, do not process timeouts or try to deliver any new events.
+    if (mDispatchFrozen) {
+#if DEBUG_FOCUS
+        ALOGD("Dispatch frozen.  Waiting some more.");
+#endif
+        return;
+    }
+
+    // Optimize latency of app switches.
+    // Essentially we start a short timeout when an app switch key (HOME / ENDCALL) has
+    // been pressed.  When it expires, we preempt dispatch and drop all other pending events.
+    bool isAppSwitchDue = mAppSwitchDueTime <= currentTime;
+    if (mAppSwitchDueTime < *nextWakeupTime) {
+        *nextWakeupTime = mAppSwitchDueTime;
+    }
+
+    // Ready to start a new event.
+    // If we don't already have a pending event, go grab one.
+    if (! mPendingEvent) {
+        if (mInboundQueue.isEmpty()) {
+            if (isAppSwitchDue) {
+                // The inbound queue is empty so the app switch key we were waiting
+                // for will never arrive.  Stop waiting for it.
+                resetPendingAppSwitchLocked(false);
+                isAppSwitchDue = false;
+            }
+
+            // Synthesize a key repeat if appropriate.
+            if (mKeyRepeatState.lastKeyEntry) {
+                if (currentTime >= mKeyRepeatState.nextRepeatTime) {
+                    mPendingEvent = synthesizeKeyRepeatLocked(currentTime);
+                } else {
+                    if (mKeyRepeatState.nextRepeatTime < *nextWakeupTime) {
+                        *nextWakeupTime = mKeyRepeatState.nextRepeatTime;
+                    }
+                }
+            }
+
+            // Nothing to do if there is no pending event.
+            if (!mPendingEvent) {
+                return;
+            }
+        } else {
+            // Inbound queue has at least one entry.
+            mPendingEvent = mInboundQueue.dequeueAtHead();
+            traceInboundQueueLengthLocked();
+        }
+
+        // Poke user activity for this event.
+        if (mPendingEvent->policyFlags & POLICY_FLAG_PASS_TO_USER) {
+            pokeUserActivityLocked(mPendingEvent);
+        }
+
+        // Get ready to dispatch the event.
+        resetANRTimeoutsLocked();
+    }
+
+    // Now we have an event to dispatch.
+    // All events are eventually dequeued and processed this way, even if we intend to drop them.
+    ALOG_ASSERT(mPendingEvent != NULL);
+    bool done = false;
+    DropReason dropReason = DROP_REASON_NOT_DROPPED;
+    if (!(mPendingEvent->policyFlags & POLICY_FLAG_PASS_TO_USER)) {
+        dropReason = DROP_REASON_POLICY;
+    } else if (!mDispatchEnabled) {
+        dropReason = DROP_REASON_DISABLED;
+    }
+
+    if (mNextUnblockedEvent == mPendingEvent) {
+        mNextUnblockedEvent = NULL;
+    }
+
+    switch (mPendingEvent->type) {
+    case EventEntry::TYPE_CONFIGURATION_CHANGED: {
+        ConfigurationChangedEntry* typedEntry =
+                static_cast<ConfigurationChangedEntry*>(mPendingEvent);
+        done = dispatchConfigurationChangedLocked(currentTime, typedEntry);
+        dropReason = DROP_REASON_NOT_DROPPED; // configuration changes are never dropped
+        break;
+    }
+
+    case EventEntry::TYPE_DEVICE_RESET: {
+        DeviceResetEntry* typedEntry =
+                static_cast<DeviceResetEntry*>(mPendingEvent);
+        done = dispatchDeviceResetLocked(currentTime, typedEntry);
+        dropReason = DROP_REASON_NOT_DROPPED; // device resets are never dropped
+        break;
+    }
+
+    case EventEntry::TYPE_KEY: {
+        KeyEntry* typedEntry = static_cast<KeyEntry*>(mPendingEvent);
+        if (isAppSwitchDue) {
+            if (isAppSwitchKeyEventLocked(typedEntry)) {
+                resetPendingAppSwitchLocked(true);
+                isAppSwitchDue = false;
+            } else if (dropReason == DROP_REASON_NOT_DROPPED) {
+                dropReason = DROP_REASON_APP_SWITCH;
+            }
+        }
+        if (dropReason == DROP_REASON_NOT_DROPPED
+                && isStaleEventLocked(currentTime, typedEntry)) {
+            dropReason = DROP_REASON_STALE;
+        }
+        if (dropReason == DROP_REASON_NOT_DROPPED && mNextUnblockedEvent) {
+            dropReason = DROP_REASON_BLOCKED;
+        }
+        done = dispatchKeyLocked(currentTime, typedEntry, &dropReason, nextWakeupTime);
+        break;
+    }
+
+    case EventEntry::TYPE_MOTION: {
+        MotionEntry* typedEntry = static_cast<MotionEntry*>(mPendingEvent);
+        if (dropReason == DROP_REASON_NOT_DROPPED && isAppSwitchDue) {
+            dropReason = DROP_REASON_APP_SWITCH;
+        }
+        if (dropReason == DROP_REASON_NOT_DROPPED
+                && isStaleEventLocked(currentTime, typedEntry)) {
+            dropReason = DROP_REASON_STALE;
+        }
+        if (dropReason == DROP_REASON_NOT_DROPPED && mNextUnblockedEvent) {
+            dropReason = DROP_REASON_BLOCKED;
+        }
+        done = dispatchMotionLocked(currentTime, typedEntry,
+                &dropReason, nextWakeupTime);
+        break;
+    }
+
+    default:
+        ALOG_ASSERT(false);
+        break;
+    }
+
+    if (done) {
+        if (dropReason != DROP_REASON_NOT_DROPPED) {
+            dropInboundEventLocked(mPendingEvent, dropReason);
+        }
+
+        releasePendingEventLocked();
+        *nextWakeupTime = LONG_LONG_MIN;  // force next poll to wake up immediately
+    }
+}
+
+bool InputDispatcher::enqueueInboundEventLocked(EventEntry* entry) {
+    bool needWake = mInboundQueue.isEmpty();
+    mInboundQueue.enqueueAtTail(entry);
+    traceInboundQueueLengthLocked();
+
+    switch (entry->type) {
+    case EventEntry::TYPE_KEY: {
+        // Optimize app switch latency.
+        // If the application takes too long to catch up then we drop all events preceding
+        // the app switch key.
+        KeyEntry* keyEntry = static_cast<KeyEntry*>(entry);
+        if (isAppSwitchKeyEventLocked(keyEntry)) {
+            if (keyEntry->action == AKEY_EVENT_ACTION_DOWN) {
+                mAppSwitchSawKeyDown = true;
+            } else if (keyEntry->action == AKEY_EVENT_ACTION_UP) {
+                if (mAppSwitchSawKeyDown) {
+#if DEBUG_APP_SWITCH
+                    ALOGD("App switch is pending!");
+#endif
+                    mAppSwitchDueTime = keyEntry->eventTime + APP_SWITCH_TIMEOUT;
+                    mAppSwitchSawKeyDown = false;
+                    needWake = true;
+                }
+            }
+        }
+        break;
+    }
+
+    case EventEntry::TYPE_MOTION: {
+        // Optimize case where the current application is unresponsive and the user
+        // decides to touch a window in a different application.
+        // If the application takes too long to catch up then we drop all events preceding
+        // the touch into the other window.
+        MotionEntry* motionEntry = static_cast<MotionEntry*>(entry);
+        if (motionEntry->action == AMOTION_EVENT_ACTION_DOWN
+                && (motionEntry->source & AINPUT_SOURCE_CLASS_POINTER)
+                && mInputTargetWaitCause == INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY
+                && mInputTargetWaitApplicationHandle != NULL) {
+            int32_t displayId = motionEntry->displayId;
+            int32_t x = int32_t(motionEntry->pointerCoords[0].
+                    getAxisValue(AMOTION_EVENT_AXIS_X));
+            int32_t y = int32_t(motionEntry->pointerCoords[0].
+                    getAxisValue(AMOTION_EVENT_AXIS_Y));
+            sp<InputWindowHandle> touchedWindowHandle = findTouchedWindowAtLocked(displayId, x, y);
+            if (touchedWindowHandle != NULL
+                    && touchedWindowHandle->inputApplicationHandle
+                            != mInputTargetWaitApplicationHandle) {
+                // User touched a different application than the one we are waiting on.
+                // Flag the event, and start pruning the input queue.
+                mNextUnblockedEvent = motionEntry;
+                needWake = true;
+            }
+        }
+        break;
+    }
+    }
+
+    return needWake;
+}
+
+void InputDispatcher::addRecentEventLocked(EventEntry* entry) {
+    entry->refCount += 1;
+    mRecentQueue.enqueueAtTail(entry);
+    if (mRecentQueue.count() > RECENT_QUEUE_MAX_SIZE) {
+        mRecentQueue.dequeueAtHead()->release();
+    }
+}
+
+sp<InputWindowHandle> InputDispatcher::findTouchedWindowAtLocked(int32_t displayId,
+        int32_t x, int32_t y) {
+    // Traverse windows from front to back to find touched window.
+    size_t numWindows = mWindowHandles.size();
+    for (size_t i = 0; i < numWindows; i++) {
+        sp<InputWindowHandle> windowHandle = mWindowHandles.itemAt(i);
+        const InputWindowInfo* windowInfo = windowHandle->getInfo();
+        if (windowInfo->displayId == displayId) {
+            int32_t flags = windowInfo->layoutParamsFlags;
+            int32_t privateFlags = windowInfo->layoutParamsPrivateFlags;
+
+            if (windowInfo->visible) {
+                if (!(flags & InputWindowInfo::FLAG_NOT_TOUCHABLE)) {
+                    bool isTouchModal = (flags & (InputWindowInfo::FLAG_NOT_FOCUSABLE
+                            | InputWindowInfo::FLAG_NOT_TOUCH_MODAL)) == 0;
+                    if (isTouchModal || windowInfo->touchableRegionContainsPoint(x, y)) {
+                        // Found window.
+                        return windowHandle;
+                    }
+                }
+            }
+
+            if (privateFlags & InputWindowInfo::PRIVATE_FLAG_SYSTEM_ERROR) {
+                // Error window is on top but not visible, so touch is dropped.
+                return NULL;
+            }
+        }
+    }
+    return NULL;
+}
+
+void InputDispatcher::dropInboundEventLocked(EventEntry* entry, DropReason dropReason) {
+    const char* reason;
+    switch (dropReason) {
+    case DROP_REASON_POLICY:
+#if DEBUG_INBOUND_EVENT_DETAILS
+        ALOGD("Dropped event because policy consumed it.");
+#endif
+        reason = "inbound event was dropped because the policy consumed it";
+        break;
+    case DROP_REASON_DISABLED:
+        ALOGI("Dropped event because input dispatch is disabled.");
+        reason = "inbound event was dropped because input dispatch is disabled";
+        break;
+    case DROP_REASON_APP_SWITCH:
+        ALOGI("Dropped event because of pending overdue app switch.");
+        reason = "inbound event was dropped because of pending overdue app switch";
+        break;
+    case DROP_REASON_BLOCKED:
+        ALOGI("Dropped event because the current application is not responding and the user "
+                "has started interacting with a different application.");
+        reason = "inbound event was dropped because the current application is not responding "
+                "and the user has started interacting with a different application";
+        break;
+    case DROP_REASON_STALE:
+        ALOGI("Dropped event because it is stale.");
+        reason = "inbound event was dropped because it is stale";
+        break;
+    default:
+        ALOG_ASSERT(false);
+        return;
+    }
+
+    switch (entry->type) {
+    case EventEntry::TYPE_KEY: {
+        CancelationOptions options(CancelationOptions::CANCEL_NON_POINTER_EVENTS, reason);
+        synthesizeCancelationEventsForAllConnectionsLocked(options);
+        break;
+    }
+    case EventEntry::TYPE_MOTION: {
+        MotionEntry* motionEntry = static_cast<MotionEntry*>(entry);
+        if (motionEntry->source & AINPUT_SOURCE_CLASS_POINTER) {
+            CancelationOptions options(CancelationOptions::CANCEL_POINTER_EVENTS, reason);
+            synthesizeCancelationEventsForAllConnectionsLocked(options);
+        } else {
+            CancelationOptions options(CancelationOptions::CANCEL_NON_POINTER_EVENTS, reason);
+            synthesizeCancelationEventsForAllConnectionsLocked(options);
+        }
+        break;
+    }
+    }
+}
+
+bool InputDispatcher::isAppSwitchKeyCode(int32_t keyCode) {
+    return keyCode == AKEYCODE_HOME
+            || keyCode == AKEYCODE_ENDCALL
+            || keyCode == AKEYCODE_APP_SWITCH;
+}
+
+bool InputDispatcher::isAppSwitchKeyEventLocked(KeyEntry* keyEntry) {
+    return ! (keyEntry->flags & AKEY_EVENT_FLAG_CANCELED)
+            && isAppSwitchKeyCode(keyEntry->keyCode)
+            && (keyEntry->policyFlags & POLICY_FLAG_TRUSTED)
+            && (keyEntry->policyFlags & POLICY_FLAG_PASS_TO_USER);
+}
+
+bool InputDispatcher::isAppSwitchPendingLocked() {
+    return mAppSwitchDueTime != LONG_LONG_MAX;
+}
+
+void InputDispatcher::resetPendingAppSwitchLocked(bool handled) {
+    mAppSwitchDueTime = LONG_LONG_MAX;
+
+#if DEBUG_APP_SWITCH
+    if (handled) {
+        ALOGD("App switch has arrived.");
+    } else {
+        ALOGD("App switch was abandoned.");
+    }
+#endif
+}
+
+bool InputDispatcher::isStaleEventLocked(nsecs_t currentTime, EventEntry* entry) {
+    return currentTime - entry->eventTime >= STALE_EVENT_TIMEOUT;
+}
+
+bool InputDispatcher::haveCommandsLocked() const {
+    return !mCommandQueue.isEmpty();
+}
+
+bool InputDispatcher::runCommandsLockedInterruptible() {
+    if (mCommandQueue.isEmpty()) {
+        return false;
+    }
+
+    do {
+        CommandEntry* commandEntry = mCommandQueue.dequeueAtHead();
+
+        Command command = commandEntry->command;
+        (this->*command)(commandEntry); // commands are implicitly 'LockedInterruptible'
+
+        commandEntry->connection.clear();
+        delete commandEntry;
+    } while (! mCommandQueue.isEmpty());
+    return true;
+}
+
+InputDispatcher::CommandEntry* InputDispatcher::postCommandLocked(Command command) {
+    CommandEntry* commandEntry = new CommandEntry(command);
+    mCommandQueue.enqueueAtTail(commandEntry);
+    return commandEntry;
+}
+
+void InputDispatcher::drainInboundQueueLocked() {
+    while (! mInboundQueue.isEmpty()) {
+        EventEntry* entry = mInboundQueue.dequeueAtHead();
+        releaseInboundEventLocked(entry);
+    }
+    traceInboundQueueLengthLocked();
+}
+
+void InputDispatcher::releasePendingEventLocked() {
+    if (mPendingEvent) {
+        resetANRTimeoutsLocked();
+        releaseInboundEventLocked(mPendingEvent);
+        mPendingEvent = NULL;
+    }
+}
+
+void InputDispatcher::releaseInboundEventLocked(EventEntry* entry) {
+    InjectionState* injectionState = entry->injectionState;
+    if (injectionState && injectionState->injectionResult == INPUT_EVENT_INJECTION_PENDING) {
+#if DEBUG_DISPATCH_CYCLE
+        ALOGD("Injected inbound event was dropped.");
+#endif
+        setInjectionResultLocked(entry, INPUT_EVENT_INJECTION_FAILED);
+    }
+    if (entry == mNextUnblockedEvent) {
+        mNextUnblockedEvent = NULL;
+    }
+    addRecentEventLocked(entry);
+    entry->release();
+}
+
+void InputDispatcher::resetKeyRepeatLocked() {
+    if (mKeyRepeatState.lastKeyEntry) {
+        mKeyRepeatState.lastKeyEntry->release();
+        mKeyRepeatState.lastKeyEntry = NULL;
+    }
+}
+
+InputDispatcher::KeyEntry* InputDispatcher::synthesizeKeyRepeatLocked(nsecs_t currentTime) {
+    KeyEntry* entry = mKeyRepeatState.lastKeyEntry;
+
+    // Reuse the repeated key entry if it is otherwise unreferenced.
+    uint32_t policyFlags = (entry->policyFlags & POLICY_FLAG_RAW_MASK)
+            | POLICY_FLAG_PASS_TO_USER | POLICY_FLAG_TRUSTED;
+    if (entry->refCount == 1) {
+        entry->recycle();
+        entry->eventTime = currentTime;
+        entry->policyFlags = policyFlags;
+        entry->repeatCount += 1;
+    } else {
+        KeyEntry* newEntry = new KeyEntry(currentTime,
+                entry->deviceId, entry->source, policyFlags,
+                entry->action, entry->flags, entry->keyCode, entry->scanCode,
+                entry->metaState, entry->repeatCount + 1, entry->downTime);
+
+        mKeyRepeatState.lastKeyEntry = newEntry;
+        entry->release();
+
+        entry = newEntry;
+    }
+    entry->syntheticRepeat = true;
+
+    // Increment reference count since we keep a reference to the event in
+    // mKeyRepeatState.lastKeyEntry in addition to the one we return.
+    entry->refCount += 1;
+
+    mKeyRepeatState.nextRepeatTime = currentTime + mConfig.keyRepeatDelay;
+    return entry;
+}
+
+bool InputDispatcher::dispatchConfigurationChangedLocked(
+        nsecs_t currentTime, ConfigurationChangedEntry* entry) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+    ALOGD("dispatchConfigurationChanged - eventTime=%lld", entry->eventTime);
+#endif
+
+    // Reset key repeating in case a keyboard device was added or removed or something.
+    resetKeyRepeatLocked();
+
+    // Enqueue a command to run outside the lock to tell the policy that the configuration changed.
+    CommandEntry* commandEntry = postCommandLocked(
+            & InputDispatcher::doNotifyConfigurationChangedInterruptible);
+    commandEntry->eventTime = entry->eventTime;
+    return true;
+}
+
+bool InputDispatcher::dispatchDeviceResetLocked(
+        nsecs_t currentTime, DeviceResetEntry* entry) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+    ALOGD("dispatchDeviceReset - eventTime=%lld, deviceId=%d", entry->eventTime, entry->deviceId);
+#endif
+
+    CancelationOptions options(CancelationOptions::CANCEL_ALL_EVENTS,
+            "device was reset");
+    options.deviceId = entry->deviceId;
+    synthesizeCancelationEventsForAllConnectionsLocked(options);
+    return true;
+}
+
+bool InputDispatcher::dispatchKeyLocked(nsecs_t currentTime, KeyEntry* entry,
+        DropReason* dropReason, nsecs_t* nextWakeupTime) {
+    // Preprocessing.
+    if (! entry->dispatchInProgress) {
+        if (entry->repeatCount == 0
+                && entry->action == AKEY_EVENT_ACTION_DOWN
+                && (entry->policyFlags & POLICY_FLAG_TRUSTED)
+                && (!(entry->policyFlags & POLICY_FLAG_DISABLE_KEY_REPEAT))) {
+            if (mKeyRepeatState.lastKeyEntry
+                    && mKeyRepeatState.lastKeyEntry->keyCode == entry->keyCode) {
+                // We have seen two identical key downs in a row which indicates that the device
+                // driver is automatically generating key repeats itself.  We take note of the
+                // repeat here, but we disable our own next key repeat timer since it is clear that
+                // we will not need to synthesize key repeats ourselves.
+                entry->repeatCount = mKeyRepeatState.lastKeyEntry->repeatCount + 1;
+                resetKeyRepeatLocked();
+                mKeyRepeatState.nextRepeatTime = LONG_LONG_MAX; // don't generate repeats ourselves
+            } else {
+                // Not a repeat.  Save key down state in case we do see a repeat later.
+                resetKeyRepeatLocked();
+                mKeyRepeatState.nextRepeatTime = entry->eventTime + mConfig.keyRepeatTimeout;
+            }
+            mKeyRepeatState.lastKeyEntry = entry;
+            entry->refCount += 1;
+        } else if (! entry->syntheticRepeat) {
+            resetKeyRepeatLocked();
+        }
+
+        if (entry->repeatCount == 1) {
+            entry->flags |= AKEY_EVENT_FLAG_LONG_PRESS;
+        } else {
+            entry->flags &= ~AKEY_EVENT_FLAG_LONG_PRESS;
+        }
+
+        entry->dispatchInProgress = true;
+
+        logOutboundKeyDetailsLocked("dispatchKey - ", entry);
+    }
+
+    // Handle case where the policy asked us to try again later last time.
+    if (entry->interceptKeyResult == KeyEntry::INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER) {
+        if (currentTime < entry->interceptKeyWakeupTime) {
+            if (entry->interceptKeyWakeupTime < *nextWakeupTime) {
+                *nextWakeupTime = entry->interceptKeyWakeupTime;
+            }
+            return false; // wait until next wakeup
+        }
+        entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_UNKNOWN;
+        entry->interceptKeyWakeupTime = 0;
+    }
+
+    // Give the policy a chance to intercept the key.
+    if (entry->interceptKeyResult == KeyEntry::INTERCEPT_KEY_RESULT_UNKNOWN) {
+        if (entry->policyFlags & POLICY_FLAG_PASS_TO_USER) {
+            CommandEntry* commandEntry = postCommandLocked(
+                    & InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible);
+            if (mFocusedWindowHandle != NULL) {
+                commandEntry->inputWindowHandle = mFocusedWindowHandle;
+            }
+            commandEntry->keyEntry = entry;
+            entry->refCount += 1;
+            return false; // wait for the command to run
+        } else {
+            entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_CONTINUE;
+        }
+    } else if (entry->interceptKeyResult == KeyEntry::INTERCEPT_KEY_RESULT_SKIP) {
+        if (*dropReason == DROP_REASON_NOT_DROPPED) {
+            *dropReason = DROP_REASON_POLICY;
+        }
+    }
+
+    // Clean up if dropping the event.
+    if (*dropReason != DROP_REASON_NOT_DROPPED) {
+        setInjectionResultLocked(entry, *dropReason == DROP_REASON_POLICY
+                ? INPUT_EVENT_INJECTION_SUCCEEDED : INPUT_EVENT_INJECTION_FAILED);
+        return true;
+    }
+
+    // Identify targets.
+    Vector<InputTarget> inputTargets;
+    int32_t injectionResult = findFocusedWindowTargetsLocked(currentTime,
+            entry, inputTargets, nextWakeupTime);
+    if (injectionResult == INPUT_EVENT_INJECTION_PENDING) {
+        return false;
+    }
+
+    setInjectionResultLocked(entry, injectionResult);
+    if (injectionResult != INPUT_EVENT_INJECTION_SUCCEEDED) {
+        return true;
+    }
+
+    addMonitoringTargetsLocked(inputTargets);
+
+    // Dispatch the key.
+    dispatchEventLocked(currentTime, entry, inputTargets);
+    return true;
+}
+
+void InputDispatcher::logOutboundKeyDetailsLocked(const char* prefix, const KeyEntry* entry) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+    ALOGD("%seventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
+            "action=0x%x, flags=0x%x, keyCode=0x%x, scanCode=0x%x, metaState=0x%x, "
+            "repeatCount=%d, downTime=%lld",
+            prefix,
+            entry->eventTime, entry->deviceId, entry->source, entry->policyFlags,
+            entry->action, entry->flags, entry->keyCode, entry->scanCode, entry->metaState,
+            entry->repeatCount, entry->downTime);
+#endif
+}
+
+bool InputDispatcher::dispatchMotionLocked(
+        nsecs_t currentTime, MotionEntry* entry, DropReason* dropReason, nsecs_t* nextWakeupTime) {
+    // Preprocessing.
+    if (! entry->dispatchInProgress) {
+        entry->dispatchInProgress = true;
+
+        logOutboundMotionDetailsLocked("dispatchMotion - ", entry);
+    }
+
+    // Clean up if dropping the event.
+    if (*dropReason != DROP_REASON_NOT_DROPPED) {
+        setInjectionResultLocked(entry, *dropReason == DROP_REASON_POLICY
+                ? INPUT_EVENT_INJECTION_SUCCEEDED : INPUT_EVENT_INJECTION_FAILED);
+        return true;
+    }
+
+    bool isPointerEvent = entry->source & AINPUT_SOURCE_CLASS_POINTER;
+
+    // Identify targets.
+    Vector<InputTarget> inputTargets;
+
+    bool conflictingPointerActions = false;
+    int32_t injectionResult;
+    if (isPointerEvent) {
+        // Pointer event.  (eg. touchscreen)
+        injectionResult = findTouchedWindowTargetsLocked(currentTime,
+                entry, inputTargets, nextWakeupTime, &conflictingPointerActions);
+    } else {
+        // Non touch event.  (eg. trackball)
+        injectionResult = findFocusedWindowTargetsLocked(currentTime,
+                entry, inputTargets, nextWakeupTime);
+    }
+    if (injectionResult == INPUT_EVENT_INJECTION_PENDING) {
+        return false;
+    }
+
+    setInjectionResultLocked(entry, injectionResult);
+    if (injectionResult != INPUT_EVENT_INJECTION_SUCCEEDED) {
+        return true;
+    }
+
+    // TODO: support sending secondary display events to input monitors
+    if (isMainDisplay(entry->displayId)) {
+        addMonitoringTargetsLocked(inputTargets);
+    }
+
+    // Dispatch the motion.
+    if (conflictingPointerActions) {
+        CancelationOptions options(CancelationOptions::CANCEL_POINTER_EVENTS,
+                "conflicting pointer actions");
+        synthesizeCancelationEventsForAllConnectionsLocked(options);
+    }
+    dispatchEventLocked(currentTime, entry, inputTargets);
+    return true;
+}
+
+
+void InputDispatcher::logOutboundMotionDetailsLocked(const char* prefix, const MotionEntry* entry) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+    ALOGD("%seventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
+            "action=0x%x, flags=0x%x, "
+            "metaState=0x%x, buttonState=0x%x, "
+            "edgeFlags=0x%x, xPrecision=%f, yPrecision=%f, downTime=%lld",
+            prefix,
+            entry->eventTime, entry->deviceId, entry->source, entry->policyFlags,
+            entry->action, entry->flags,
+            entry->metaState, entry->buttonState,
+            entry->edgeFlags, entry->xPrecision, entry->yPrecision,
+            entry->downTime);
+
+    for (uint32_t i = 0; i < entry->pointerCount; i++) {
+        ALOGD("  Pointer %d: id=%d, toolType=%d, "
+                "x=%f, y=%f, pressure=%f, size=%f, "
+                "touchMajor=%f, touchMinor=%f, toolMajor=%f, toolMinor=%f, "
+                "orientation=%f",
+                i, entry->pointerProperties[i].id,
+                entry->pointerProperties[i].toolType,
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_X),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_Y),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_SIZE),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION));
+    }
+#endif
+}
+
+void InputDispatcher::dispatchEventLocked(nsecs_t currentTime,
+        EventEntry* eventEntry, const Vector<InputTarget>& inputTargets) {
+#if DEBUG_DISPATCH_CYCLE
+    ALOGD("dispatchEventToCurrentInputTargets");
+#endif
+
+    ALOG_ASSERT(eventEntry->dispatchInProgress); // should already have been set to true
+
+    pokeUserActivityLocked(eventEntry);
+
+    for (size_t i = 0; i < inputTargets.size(); i++) {
+        const InputTarget& inputTarget = inputTargets.itemAt(i);
+
+        ssize_t connectionIndex = getConnectionIndexLocked(inputTarget.inputChannel);
+        if (connectionIndex >= 0) {
+            sp<Connection> connection = mConnectionsByFd.valueAt(connectionIndex);
+            prepareDispatchCycleLocked(currentTime, connection, eventEntry, &inputTarget);
+        } else {
+#if DEBUG_FOCUS
+            ALOGD("Dropping event delivery to target with channel '%s' because it "
+                    "is no longer registered with the input dispatcher.",
+                    inputTarget.inputChannel->getName().string());
+#endif
+        }
+    }
+}
+
+int32_t InputDispatcher::handleTargetsNotReadyLocked(nsecs_t currentTime,
+        const EventEntry* entry,
+        const sp<InputApplicationHandle>& applicationHandle,
+        const sp<InputWindowHandle>& windowHandle,
+        nsecs_t* nextWakeupTime, const char* reason) {
+    if (applicationHandle == NULL && windowHandle == NULL) {
+        if (mInputTargetWaitCause != INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY) {
+#if DEBUG_FOCUS
+            ALOGD("Waiting for system to become ready for input.  Reason: %s", reason);
+#endif
+            mInputTargetWaitCause = INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY;
+            mInputTargetWaitStartTime = currentTime;
+            mInputTargetWaitTimeoutTime = LONG_LONG_MAX;
+            mInputTargetWaitTimeoutExpired = false;
+            mInputTargetWaitApplicationHandle.clear();
+        }
+    } else {
+        if (mInputTargetWaitCause != INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY) {
+#if DEBUG_FOCUS
+            ALOGD("Waiting for application to become ready for input: %s.  Reason: %s",
+                    getApplicationWindowLabelLocked(applicationHandle, windowHandle).string(),
+                    reason);
+#endif
+            nsecs_t timeout;
+            if (windowHandle != NULL) {
+                timeout = windowHandle->getDispatchingTimeout(DEFAULT_INPUT_DISPATCHING_TIMEOUT);
+            } else if (applicationHandle != NULL) {
+                timeout = applicationHandle->getDispatchingTimeout(
+                        DEFAULT_INPUT_DISPATCHING_TIMEOUT);
+            } else {
+                timeout = DEFAULT_INPUT_DISPATCHING_TIMEOUT;
+            }
+
+            mInputTargetWaitCause = INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY;
+            mInputTargetWaitStartTime = currentTime;
+            mInputTargetWaitTimeoutTime = currentTime + timeout;
+            mInputTargetWaitTimeoutExpired = false;
+            mInputTargetWaitApplicationHandle.clear();
+
+            if (windowHandle != NULL) {
+                mInputTargetWaitApplicationHandle = windowHandle->inputApplicationHandle;
+            }
+            if (mInputTargetWaitApplicationHandle == NULL && applicationHandle != NULL) {
+                mInputTargetWaitApplicationHandle = applicationHandle;
+            }
+        }
+    }
+
+    if (mInputTargetWaitTimeoutExpired) {
+        return INPUT_EVENT_INJECTION_TIMED_OUT;
+    }
+
+    if (currentTime >= mInputTargetWaitTimeoutTime) {
+        onANRLocked(currentTime, applicationHandle, windowHandle,
+                entry->eventTime, mInputTargetWaitStartTime, reason);
+
+        // Force poll loop to wake up immediately on next iteration once we get the
+        // ANR response back from the policy.
+        *nextWakeupTime = LONG_LONG_MIN;
+        return INPUT_EVENT_INJECTION_PENDING;
+    } else {
+        // Force poll loop to wake up when timeout is due.
+        if (mInputTargetWaitTimeoutTime < *nextWakeupTime) {
+            *nextWakeupTime = mInputTargetWaitTimeoutTime;
+        }
+        return INPUT_EVENT_INJECTION_PENDING;
+    }
+}
+
+void InputDispatcher::resumeAfterTargetsNotReadyTimeoutLocked(nsecs_t newTimeout,
+        const sp<InputChannel>& inputChannel) {
+    if (newTimeout > 0) {
+        // Extend the timeout.
+        mInputTargetWaitTimeoutTime = now() + newTimeout;
+    } else {
+        // Give up.
+        mInputTargetWaitTimeoutExpired = true;
+
+        // Input state will not be realistic.  Mark it out of sync.
+        if (inputChannel.get()) {
+            ssize_t connectionIndex = getConnectionIndexLocked(inputChannel);
+            if (connectionIndex >= 0) {
+                sp<Connection> connection = mConnectionsByFd.valueAt(connectionIndex);
+                sp<InputWindowHandle> windowHandle = connection->inputWindowHandle;
+
+                if (windowHandle != NULL) {
+                    mTouchState.removeWindow(windowHandle);
+                }
+
+                if (connection->status == Connection::STATUS_NORMAL) {
+                    CancelationOptions options(CancelationOptions::CANCEL_ALL_EVENTS,
+                            "application not responding");
+                    synthesizeCancelationEventsForConnectionLocked(connection, options);
+                }
+            }
+        }
+    }
+}
+
+nsecs_t InputDispatcher::getTimeSpentWaitingForApplicationLocked(
+        nsecs_t currentTime) {
+    if (mInputTargetWaitCause == INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY) {
+        return currentTime - mInputTargetWaitStartTime;
+    }
+    return 0;
+}
+
+void InputDispatcher::resetANRTimeoutsLocked() {
+#if DEBUG_FOCUS
+        ALOGD("Resetting ANR timeouts.");
+#endif
+
+    // Reset input target wait timeout.
+    mInputTargetWaitCause = INPUT_TARGET_WAIT_CAUSE_NONE;
+    mInputTargetWaitApplicationHandle.clear();
+}
+
+int32_t InputDispatcher::findFocusedWindowTargetsLocked(nsecs_t currentTime,
+        const EventEntry* entry, Vector<InputTarget>& inputTargets, nsecs_t* nextWakeupTime) {
+    int32_t injectionResult;
+
+    // If there is no currently focused window and no focused application
+    // then drop the event.
+    if (mFocusedWindowHandle == NULL) {
+        if (mFocusedApplicationHandle != NULL) {
+            injectionResult = handleTargetsNotReadyLocked(currentTime, entry,
+                    mFocusedApplicationHandle, NULL, nextWakeupTime,
+                    "Waiting because no window has focus but there is a "
+                    "focused application that may eventually add a window "
+                    "when it finishes starting up.");
+            goto Unresponsive;
+        }
+
+        ALOGI("Dropping event because there is no focused window or focused application.");
+        injectionResult = INPUT_EVENT_INJECTION_FAILED;
+        goto Failed;
+    }
+
+    // Check permissions.
+    if (! checkInjectionPermission(mFocusedWindowHandle, entry->injectionState)) {
+        injectionResult = INPUT_EVENT_INJECTION_PERMISSION_DENIED;
+        goto Failed;
+    }
+
+    // If the currently focused window is paused then keep waiting.
+    if (mFocusedWindowHandle->getInfo()->paused) {
+        injectionResult = handleTargetsNotReadyLocked(currentTime, entry,
+                mFocusedApplicationHandle, mFocusedWindowHandle, nextWakeupTime,
+                "Waiting because the focused window is paused.");
+        goto Unresponsive;
+    }
+
+    // If the currently focused window is still working on previous events then keep waiting.
+    if (!isWindowReadyForMoreInputLocked(currentTime, mFocusedWindowHandle, entry)) {
+        injectionResult = handleTargetsNotReadyLocked(currentTime, entry,
+                mFocusedApplicationHandle, mFocusedWindowHandle, nextWakeupTime,
+                "Waiting because the focused window has not finished "
+                "processing the input events that were previously delivered to it.");
+        goto Unresponsive;
+    }
+
+    // Success!  Output targets.
+    injectionResult = INPUT_EVENT_INJECTION_SUCCEEDED;
+    addWindowTargetLocked(mFocusedWindowHandle,
+            InputTarget::FLAG_FOREGROUND | InputTarget::FLAG_DISPATCH_AS_IS, BitSet32(0),
+            inputTargets);
+
+    // Done.
+Failed:
+Unresponsive:
+    nsecs_t timeSpentWaitingForApplication = getTimeSpentWaitingForApplicationLocked(currentTime);
+    updateDispatchStatisticsLocked(currentTime, entry,
+            injectionResult, timeSpentWaitingForApplication);
+#if DEBUG_FOCUS
+    ALOGD("findFocusedWindow finished: injectionResult=%d, "
+            "timeSpentWaitingForApplication=%0.1fms",
+            injectionResult, timeSpentWaitingForApplication / 1000000.0);
+#endif
+    return injectionResult;
+}
+
+int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
+        const MotionEntry* entry, Vector<InputTarget>& inputTargets, nsecs_t* nextWakeupTime,
+        bool* outConflictingPointerActions) {
+    enum InjectionPermission {
+        INJECTION_PERMISSION_UNKNOWN,
+        INJECTION_PERMISSION_GRANTED,
+        INJECTION_PERMISSION_DENIED
+    };
+
+    nsecs_t startTime = now();
+
+    // For security reasons, we defer updating the touch state until we are sure that
+    // event injection will be allowed.
+    //
+    // FIXME In the original code, screenWasOff could never be set to true.
+    //       The reason is that the POLICY_FLAG_WOKE_HERE
+    //       and POLICY_FLAG_BRIGHT_HERE flags were set only when preprocessing raw
+    //       EV_KEY, EV_REL and EV_ABS events.  As it happens, the touch event was
+    //       actually enqueued using the policyFlags that appeared in the final EV_SYN
+    //       events upon which no preprocessing took place.  So policyFlags was always 0.
+    //       In the new native input dispatcher we're a bit more careful about event
+    //       preprocessing so the touches we receive can actually have non-zero policyFlags.
+    //       Unfortunately we obtain undesirable behavior.
+    //
+    //       Here's what happens:
+    //
+    //       When the device dims in anticipation of going to sleep, touches
+    //       in windows which have FLAG_TOUCHABLE_WHEN_WAKING cause
+    //       the device to brighten and reset the user activity timer.
+    //       Touches on other windows (such as the launcher window)
+    //       are dropped.  Then after a moment, the device goes to sleep.  Oops.
+    //
+    //       Also notice how screenWasOff was being initialized using POLICY_FLAG_BRIGHT_HERE
+    //       instead of POLICY_FLAG_WOKE_HERE...
+    //
+    bool screenWasOff = false; // original policy: policyFlags & POLICY_FLAG_BRIGHT_HERE;
+
+    int32_t displayId = entry->displayId;
+    int32_t action = entry->action;
+    int32_t maskedAction = action & AMOTION_EVENT_ACTION_MASK;
+
+    // Update the touch state as needed based on the properties of the touch event.
+    int32_t injectionResult = INPUT_EVENT_INJECTION_PENDING;
+    InjectionPermission injectionPermission = INJECTION_PERMISSION_UNKNOWN;
+    sp<InputWindowHandle> newHoverWindowHandle;
+
+    bool isSplit = mTouchState.split;
+    bool switchedDevice = mTouchState.deviceId >= 0 && mTouchState.displayId >= 0
+            && (mTouchState.deviceId != entry->deviceId
+                    || mTouchState.source != entry->source
+                    || mTouchState.displayId != displayId);
+    bool isHoverAction = (maskedAction == AMOTION_EVENT_ACTION_HOVER_MOVE
+            || maskedAction == AMOTION_EVENT_ACTION_HOVER_ENTER
+            || maskedAction == AMOTION_EVENT_ACTION_HOVER_EXIT);
+    bool newGesture = (maskedAction == AMOTION_EVENT_ACTION_DOWN
+            || maskedAction == AMOTION_EVENT_ACTION_SCROLL
+            || isHoverAction);
+    bool wrongDevice = false;
+    if (newGesture) {
+        bool down = maskedAction == AMOTION_EVENT_ACTION_DOWN;
+        if (switchedDevice && mTouchState.down && !down) {
+#if DEBUG_FOCUS
+            ALOGD("Dropping event because a pointer for a different device is already down.");
+#endif
+            mTempTouchState.copyFrom(mTouchState);
+            injectionResult = INPUT_EVENT_INJECTION_FAILED;
+            switchedDevice = false;
+            wrongDevice = true;
+            goto Failed;
+        }
+        mTempTouchState.reset();
+        mTempTouchState.down = down;
+        mTempTouchState.deviceId = entry->deviceId;
+        mTempTouchState.source = entry->source;
+        mTempTouchState.displayId = displayId;
+        isSplit = false;
+    } else {
+        mTempTouchState.copyFrom(mTouchState);
+    }
+
+    if (newGesture || (isSplit && maskedAction == AMOTION_EVENT_ACTION_POINTER_DOWN)) {
+        /* Case 1: New splittable pointer going down, or need target for hover or scroll. */
+
+        int32_t pointerIndex = getMotionEventActionPointerIndex(action);
+        int32_t x = int32_t(entry->pointerCoords[pointerIndex].
+                getAxisValue(AMOTION_EVENT_AXIS_X));
+        int32_t y = int32_t(entry->pointerCoords[pointerIndex].
+                getAxisValue(AMOTION_EVENT_AXIS_Y));
+        sp<InputWindowHandle> newTouchedWindowHandle;
+        sp<InputWindowHandle> topErrorWindowHandle;
+        bool isTouchModal = false;
+
+        // Traverse windows from front to back to find touched window and outside targets.
+        size_t numWindows = mWindowHandles.size();
+        for (size_t i = 0; i < numWindows; i++) {
+            sp<InputWindowHandle> windowHandle = mWindowHandles.itemAt(i);
+            const InputWindowInfo* windowInfo = windowHandle->getInfo();
+            if (windowInfo->displayId != displayId) {
+                continue; // wrong display
+            }
+
+            int32_t privateFlags = windowInfo->layoutParamsPrivateFlags;
+            if (privateFlags & InputWindowInfo::PRIVATE_FLAG_SYSTEM_ERROR) {
+                if (topErrorWindowHandle == NULL) {
+                    topErrorWindowHandle = windowHandle;
+                }
+            }
+
+            int32_t flags = windowInfo->layoutParamsFlags;
+            if (windowInfo->visible) {
+                if (! (flags & InputWindowInfo::FLAG_NOT_TOUCHABLE)) {
+                    isTouchModal = (flags & (InputWindowInfo::FLAG_NOT_FOCUSABLE
+                            | InputWindowInfo::FLAG_NOT_TOUCH_MODAL)) == 0;
+                    if (isTouchModal || windowInfo->touchableRegionContainsPoint(x, y)) {
+                        if (! screenWasOff
+                                || (flags & InputWindowInfo::FLAG_TOUCHABLE_WHEN_WAKING)) {
+                            newTouchedWindowHandle = windowHandle;
+                        }
+                        break; // found touched window, exit window loop
+                    }
+                }
+
+                if (maskedAction == AMOTION_EVENT_ACTION_DOWN
+                        && (flags & InputWindowInfo::FLAG_WATCH_OUTSIDE_TOUCH)) {
+                    int32_t outsideTargetFlags = InputTarget::FLAG_DISPATCH_AS_OUTSIDE;
+                    if (isWindowObscuredAtPointLocked(windowHandle, x, y)) {
+                        outsideTargetFlags |= InputTarget::FLAG_WINDOW_IS_OBSCURED;
+                    }
+
+                    mTempTouchState.addOrUpdateWindow(
+                            windowHandle, outsideTargetFlags, BitSet32(0));
+                }
+            }
+        }
+
+        // If there is an error window but it is not taking focus (typically because
+        // it is invisible) then wait for it.  Any other focused window may in
+        // fact be in ANR state.
+        if (topErrorWindowHandle != NULL && newTouchedWindowHandle != topErrorWindowHandle) {
+            injectionResult = handleTargetsNotReadyLocked(currentTime, entry,
+                    NULL, NULL, nextWakeupTime,
+                    "Waiting because a system error window is about to be displayed.");
+            injectionPermission = INJECTION_PERMISSION_UNKNOWN;
+            goto Unresponsive;
+        }
+
+        // Figure out whether splitting will be allowed for this window.
+        if (newTouchedWindowHandle != NULL
+                && newTouchedWindowHandle->getInfo()->supportsSplitTouch()) {
+            // New window supports splitting.
+            isSplit = true;
+        } else if (isSplit) {
+            // New window does not support splitting but we have already split events.
+            // Ignore the new window.
+            newTouchedWindowHandle = NULL;
+        }
+
+        // Handle the case where we did not find a window.
+        if (newTouchedWindowHandle == NULL) {
+            // Try to assign the pointer to the first foreground window we find, if there is one.
+            newTouchedWindowHandle = mTempTouchState.getFirstForegroundWindowHandle();
+            if (newTouchedWindowHandle == NULL) {
+                ALOGI("Dropping event because there is no touchable window at (%d, %d).", x, y);
+                injectionResult = INPUT_EVENT_INJECTION_FAILED;
+                goto Failed;
+            }
+        }
+
+        // Set target flags.
+        int32_t targetFlags = InputTarget::FLAG_FOREGROUND | InputTarget::FLAG_DISPATCH_AS_IS;
+        if (isSplit) {
+            targetFlags |= InputTarget::FLAG_SPLIT;
+        }
+        if (isWindowObscuredAtPointLocked(newTouchedWindowHandle, x, y)) {
+            targetFlags |= InputTarget::FLAG_WINDOW_IS_OBSCURED;
+        }
+
+        // Update hover state.
+        if (isHoverAction) {
+            newHoverWindowHandle = newTouchedWindowHandle;
+        } else if (maskedAction == AMOTION_EVENT_ACTION_SCROLL) {
+            newHoverWindowHandle = mLastHoverWindowHandle;
+        }
+
+        // Update the temporary touch state.
+        BitSet32 pointerIds;
+        if (isSplit) {
+            uint32_t pointerId = entry->pointerProperties[pointerIndex].id;
+            pointerIds.markBit(pointerId);
+        }
+        mTempTouchState.addOrUpdateWindow(newTouchedWindowHandle, targetFlags, pointerIds);
+    } else {
+        /* Case 2: Pointer move, up, cancel or non-splittable pointer down. */
+
+        // If the pointer is not currently down, then ignore the event.
+        if (! mTempTouchState.down) {
+#if DEBUG_FOCUS
+            ALOGD("Dropping event because the pointer is not down or we previously "
+                    "dropped the pointer down event.");
+#endif
+            injectionResult = INPUT_EVENT_INJECTION_FAILED;
+            goto Failed;
+        }
+
+        // Check whether touches should slip outside of the current foreground window.
+        if (maskedAction == AMOTION_EVENT_ACTION_MOVE
+                && entry->pointerCount == 1
+                && mTempTouchState.isSlippery()) {
+            int32_t x = int32_t(entry->pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_X));
+            int32_t y = int32_t(entry->pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_Y));
+
+            sp<InputWindowHandle> oldTouchedWindowHandle =
+                    mTempTouchState.getFirstForegroundWindowHandle();
+            sp<InputWindowHandle> newTouchedWindowHandle =
+                    findTouchedWindowAtLocked(displayId, x, y);
+            if (oldTouchedWindowHandle != newTouchedWindowHandle
+                    && newTouchedWindowHandle != NULL) {
+#if DEBUG_FOCUS
+                ALOGD("Touch is slipping out of window %s into window %s.",
+                        oldTouchedWindowHandle->getName().string(),
+                        newTouchedWindowHandle->getName().string());
+#endif
+                // Make a slippery exit from the old window.
+                mTempTouchState.addOrUpdateWindow(oldTouchedWindowHandle,
+                        InputTarget::FLAG_DISPATCH_AS_SLIPPERY_EXIT, BitSet32(0));
+
+                // Make a slippery entrance into the new window.
+                if (newTouchedWindowHandle->getInfo()->supportsSplitTouch()) {
+                    isSplit = true;
+                }
+
+                int32_t targetFlags = InputTarget::FLAG_FOREGROUND
+                        | InputTarget::FLAG_DISPATCH_AS_SLIPPERY_ENTER;
+                if (isSplit) {
+                    targetFlags |= InputTarget::FLAG_SPLIT;
+                }
+                if (isWindowObscuredAtPointLocked(newTouchedWindowHandle, x, y)) {
+                    targetFlags |= InputTarget::FLAG_WINDOW_IS_OBSCURED;
+                }
+
+                BitSet32 pointerIds;
+                if (isSplit) {
+                    pointerIds.markBit(entry->pointerProperties[0].id);
+                }
+                mTempTouchState.addOrUpdateWindow(newTouchedWindowHandle, targetFlags, pointerIds);
+            }
+        }
+    }
+
+    if (newHoverWindowHandle != mLastHoverWindowHandle) {
+        // Let the previous window know that the hover sequence is over.
+        if (mLastHoverWindowHandle != NULL) {
+#if DEBUG_HOVER
+            ALOGD("Sending hover exit event to window %s.",
+                    mLastHoverWindowHandle->getName().string());
+#endif
+            mTempTouchState.addOrUpdateWindow(mLastHoverWindowHandle,
+                    InputTarget::FLAG_DISPATCH_AS_HOVER_EXIT, BitSet32(0));
+        }
+
+        // Let the new window know that the hover sequence is starting.
+        if (newHoverWindowHandle != NULL) {
+#if DEBUG_HOVER
+            ALOGD("Sending hover enter event to window %s.",
+                    newHoverWindowHandle->getName().string());
+#endif
+            mTempTouchState.addOrUpdateWindow(newHoverWindowHandle,
+                    InputTarget::FLAG_DISPATCH_AS_HOVER_ENTER, BitSet32(0));
+        }
+    }
+
+    // Check permission to inject into all touched foreground windows and ensure there
+    // is at least one touched foreground window.
+    {
+        bool haveForegroundWindow = false;
+        for (size_t i = 0; i < mTempTouchState.windows.size(); i++) {
+            const TouchedWindow& touchedWindow = mTempTouchState.windows[i];
+            if (touchedWindow.targetFlags & InputTarget::FLAG_FOREGROUND) {
+                haveForegroundWindow = true;
+                if (! checkInjectionPermission(touchedWindow.windowHandle,
+                        entry->injectionState)) {
+                    injectionResult = INPUT_EVENT_INJECTION_PERMISSION_DENIED;
+                    injectionPermission = INJECTION_PERMISSION_DENIED;
+                    goto Failed;
+                }
+            }
+        }
+        if (! haveForegroundWindow) {
+#if DEBUG_FOCUS
+            ALOGD("Dropping event because there is no touched foreground window to receive it.");
+#endif
+            injectionResult = INPUT_EVENT_INJECTION_FAILED;
+            goto Failed;
+        }
+
+        // Permission granted to injection into all touched foreground windows.
+        injectionPermission = INJECTION_PERMISSION_GRANTED;
+    }
+
+    // Check whether windows listening for outside touches are owned by the same UID. If it is
+    // set the policy flag that we will not reveal coordinate information to this window.
+    if (maskedAction == AMOTION_EVENT_ACTION_DOWN) {
+        sp<InputWindowHandle> foregroundWindowHandle =
+                mTempTouchState.getFirstForegroundWindowHandle();
+        const int32_t foregroundWindowUid = foregroundWindowHandle->getInfo()->ownerUid;
+        for (size_t i = 0; i < mTempTouchState.windows.size(); i++) {
+            const TouchedWindow& touchedWindow = mTempTouchState.windows[i];
+            if (touchedWindow.targetFlags & InputTarget::FLAG_DISPATCH_AS_OUTSIDE) {
+                sp<InputWindowHandle> inputWindowHandle = touchedWindow.windowHandle;
+                if (inputWindowHandle->getInfo()->ownerUid != foregroundWindowUid) {
+                    mTempTouchState.addOrUpdateWindow(inputWindowHandle,
+                            InputTarget::FLAG_ZERO_COORDS, BitSet32(0));
+                }
+            }
+        }
+    }
+
+    // Ensure all touched foreground windows are ready for new input.
+    for (size_t i = 0; i < mTempTouchState.windows.size(); i++) {
+        const TouchedWindow& touchedWindow = mTempTouchState.windows[i];
+        if (touchedWindow.targetFlags & InputTarget::FLAG_FOREGROUND) {
+            // If the touched window is paused then keep waiting.
+            if (touchedWindow.windowHandle->getInfo()->paused) {
+                injectionResult = handleTargetsNotReadyLocked(currentTime, entry,
+                        NULL, touchedWindow.windowHandle, nextWakeupTime,
+                        "Waiting because the touched window is paused.");
+                goto Unresponsive;
+            }
+
+            // If the touched window is still working on previous events then keep waiting.
+            if (!isWindowReadyForMoreInputLocked(currentTime, touchedWindow.windowHandle, entry)) {
+                injectionResult = handleTargetsNotReadyLocked(currentTime, entry,
+                        NULL, touchedWindow.windowHandle, nextWakeupTime,
+                        "Waiting because the touched window has not finished "
+                        "processing the input events that were previously delivered to it.");
+                goto Unresponsive;
+            }
+        }
+    }
+
+    // If this is the first pointer going down and the touched window has a wallpaper
+    // then also add the touched wallpaper windows so they are locked in for the duration
+    // of the touch gesture.
+    // We do not collect wallpapers during HOVER_MOVE or SCROLL because the wallpaper
+    // engine only supports touch events.  We would need to add a mechanism similar
+    // to View.onGenericMotionEvent to enable wallpapers to handle these events.
+    if (maskedAction == AMOTION_EVENT_ACTION_DOWN) {
+        sp<InputWindowHandle> foregroundWindowHandle =
+                mTempTouchState.getFirstForegroundWindowHandle();
+        if (foregroundWindowHandle->getInfo()->hasWallpaper) {
+            for (size_t i = 0; i < mWindowHandles.size(); i++) {
+                sp<InputWindowHandle> windowHandle = mWindowHandles.itemAt(i);
+                const InputWindowInfo* info = windowHandle->getInfo();
+                if (info->displayId == displayId
+                        && windowHandle->getInfo()->layoutParamsType
+                                == InputWindowInfo::TYPE_WALLPAPER) {
+                    mTempTouchState.addOrUpdateWindow(windowHandle,
+                            InputTarget::FLAG_WINDOW_IS_OBSCURED
+                                    | InputTarget::FLAG_DISPATCH_AS_IS,
+                            BitSet32(0));
+                }
+            }
+        }
+    }
+
+    // Success!  Output targets.
+    injectionResult = INPUT_EVENT_INJECTION_SUCCEEDED;
+
+    for (size_t i = 0; i < mTempTouchState.windows.size(); i++) {
+        const TouchedWindow& touchedWindow = mTempTouchState.windows.itemAt(i);
+        addWindowTargetLocked(touchedWindow.windowHandle, touchedWindow.targetFlags,
+                touchedWindow.pointerIds, inputTargets);
+    }
+
+    // Drop the outside or hover touch windows since we will not care about them
+    // in the next iteration.
+    mTempTouchState.filterNonAsIsTouchWindows();
+
+Failed:
+    // Check injection permission once and for all.
+    if (injectionPermission == INJECTION_PERMISSION_UNKNOWN) {
+        if (checkInjectionPermission(NULL, entry->injectionState)) {
+            injectionPermission = INJECTION_PERMISSION_GRANTED;
+        } else {
+            injectionPermission = INJECTION_PERMISSION_DENIED;
+        }
+    }
+
+    // Update final pieces of touch state if the injector had permission.
+    if (injectionPermission == INJECTION_PERMISSION_GRANTED) {
+        if (!wrongDevice) {
+            if (switchedDevice) {
+#if DEBUG_FOCUS
+                ALOGD("Conflicting pointer actions: Switched to a different device.");
+#endif
+                *outConflictingPointerActions = true;
+            }
+
+            if (isHoverAction) {
+                // Started hovering, therefore no longer down.
+                if (mTouchState.down) {
+#if DEBUG_FOCUS
+                    ALOGD("Conflicting pointer actions: Hover received while pointer was down.");
+#endif
+                    *outConflictingPointerActions = true;
+                }
+                mTouchState.reset();
+                if (maskedAction == AMOTION_EVENT_ACTION_HOVER_ENTER
+                        || maskedAction == AMOTION_EVENT_ACTION_HOVER_MOVE) {
+                    mTouchState.deviceId = entry->deviceId;
+                    mTouchState.source = entry->source;
+                    mTouchState.displayId = displayId;
+                }
+            } else if (maskedAction == AMOTION_EVENT_ACTION_UP
+                    || maskedAction == AMOTION_EVENT_ACTION_CANCEL) {
+                // All pointers up or canceled.
+                mTouchState.reset();
+            } else if (maskedAction == AMOTION_EVENT_ACTION_DOWN) {
+                // First pointer went down.
+                if (mTouchState.down) {
+#if DEBUG_FOCUS
+                    ALOGD("Conflicting pointer actions: Down received while already down.");
+#endif
+                    *outConflictingPointerActions = true;
+                }
+                mTouchState.copyFrom(mTempTouchState);
+            } else if (maskedAction == AMOTION_EVENT_ACTION_POINTER_UP) {
+                // One pointer went up.
+                if (isSplit) {
+                    int32_t pointerIndex = getMotionEventActionPointerIndex(action);
+                    uint32_t pointerId = entry->pointerProperties[pointerIndex].id;
+
+                    for (size_t i = 0; i < mTempTouchState.windows.size(); ) {
+                        TouchedWindow& touchedWindow = mTempTouchState.windows.editItemAt(i);
+                        if (touchedWindow.targetFlags & InputTarget::FLAG_SPLIT) {
+                            touchedWindow.pointerIds.clearBit(pointerId);
+                            if (touchedWindow.pointerIds.isEmpty()) {
+                                mTempTouchState.windows.removeAt(i);
+                                continue;
+                            }
+                        }
+                        i += 1;
+                    }
+                }
+                mTouchState.copyFrom(mTempTouchState);
+            } else if (maskedAction == AMOTION_EVENT_ACTION_SCROLL) {
+                // Discard temporary touch state since it was only valid for this action.
+            } else {
+                // Save changes to touch state as-is for all other actions.
+                mTouchState.copyFrom(mTempTouchState);
+            }
+
+            // Update hover state.
+            mLastHoverWindowHandle = newHoverWindowHandle;
+        }
+    } else {
+#if DEBUG_FOCUS
+        ALOGD("Not updating touch focus because injection was denied.");
+#endif
+    }
+
+Unresponsive:
+    // Reset temporary touch state to ensure we release unnecessary references to input channels.
+    mTempTouchState.reset();
+
+    nsecs_t timeSpentWaitingForApplication = getTimeSpentWaitingForApplicationLocked(currentTime);
+    updateDispatchStatisticsLocked(currentTime, entry,
+            injectionResult, timeSpentWaitingForApplication);
+#if DEBUG_FOCUS
+    ALOGD("findTouchedWindow finished: injectionResult=%d, injectionPermission=%d, "
+            "timeSpentWaitingForApplication=%0.1fms",
+            injectionResult, injectionPermission, timeSpentWaitingForApplication / 1000000.0);
+#endif
+    return injectionResult;
+}
+
+void InputDispatcher::addWindowTargetLocked(const sp<InputWindowHandle>& windowHandle,
+        int32_t targetFlags, BitSet32 pointerIds, Vector<InputTarget>& inputTargets) {
+    inputTargets.push();
+
+    const InputWindowInfo* windowInfo = windowHandle->getInfo();
+    InputTarget& target = inputTargets.editTop();
+    target.inputChannel = windowInfo->inputChannel;
+    target.flags = targetFlags;
+    target.xOffset = - windowInfo->frameLeft;
+    target.yOffset = - windowInfo->frameTop;
+    target.scaleFactor = windowInfo->scaleFactor;
+    target.pointerIds = pointerIds;
+}
+
+void InputDispatcher::addMonitoringTargetsLocked(Vector<InputTarget>& inputTargets) {
+    for (size_t i = 0; i < mMonitoringChannels.size(); i++) {
+        inputTargets.push();
+
+        InputTarget& target = inputTargets.editTop();
+        target.inputChannel = mMonitoringChannels[i];
+        target.flags = InputTarget::FLAG_DISPATCH_AS_IS;
+        target.xOffset = 0;
+        target.yOffset = 0;
+        target.pointerIds.clear();
+        target.scaleFactor = 1.0f;
+    }
+}
+
+bool InputDispatcher::checkInjectionPermission(const sp<InputWindowHandle>& windowHandle,
+        const InjectionState* injectionState) {
+    if (injectionState
+            && (windowHandle == NULL
+                    || windowHandle->getInfo()->ownerUid != injectionState->injectorUid)
+            && !hasInjectionPermission(injectionState->injectorPid, injectionState->injectorUid)) {
+        if (windowHandle != NULL) {
+            ALOGW("Permission denied: injecting event from pid %d uid %d to window %s "
+                    "owned by uid %d",
+                    injectionState->injectorPid, injectionState->injectorUid,
+                    windowHandle->getName().string(),
+                    windowHandle->getInfo()->ownerUid);
+        } else {
+            ALOGW("Permission denied: injecting event from pid %d uid %d",
+                    injectionState->injectorPid, injectionState->injectorUid);
+        }
+        return false;
+    }
+    return true;
+}
+
+bool InputDispatcher::isWindowObscuredAtPointLocked(
+        const sp<InputWindowHandle>& windowHandle, int32_t x, int32_t y) const {
+    int32_t displayId = windowHandle->getInfo()->displayId;
+    size_t numWindows = mWindowHandles.size();
+    for (size_t i = 0; i < numWindows; i++) {
+        sp<InputWindowHandle> otherHandle = mWindowHandles.itemAt(i);
+        if (otherHandle == windowHandle) {
+            break;
+        }
+
+        const InputWindowInfo* otherInfo = otherHandle->getInfo();
+        if (otherInfo->displayId == displayId
+                && otherInfo->visible && !otherInfo->isTrustedOverlay()
+                && otherInfo->frameContainsPoint(x, y)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool InputDispatcher::isWindowReadyForMoreInputLocked(nsecs_t currentTime,
+        const sp<InputWindowHandle>& windowHandle, const EventEntry* eventEntry) {
+    ssize_t connectionIndex = getConnectionIndexLocked(windowHandle->getInputChannel());
+    if (connectionIndex >= 0) {
+        sp<Connection> connection = mConnectionsByFd.valueAt(connectionIndex);
+        if (connection->inputPublisherBlocked) {
+            return false;
+        }
+        if (eventEntry->type == EventEntry::TYPE_KEY) {
+            // If the event is a key event, then we must wait for all previous events to
+            // complete before delivering it because previous events may have the
+            // side-effect of transferring focus to a different window and we want to
+            // ensure that the following keys are sent to the new window.
+            //
+            // Suppose the user touches a button in a window then immediately presses "A".
+            // If the button causes a pop-up window to appear then we want to ensure that
+            // the "A" key is delivered to the new pop-up window.  This is because users
+            // often anticipate pending UI changes when typing on a keyboard.
+            // To obtain this behavior, we must serialize key events with respect to all
+            // prior input events.
+            return connection->outboundQueue.isEmpty()
+                    && connection->waitQueue.isEmpty();
+        }
+        // Touch events can always be sent to a window immediately because the user intended
+        // to touch whatever was visible at the time.  Even if focus changes or a new
+        // window appears moments later, the touch event was meant to be delivered to
+        // whatever window happened to be on screen at the time.
+        //
+        // Generic motion events, such as trackball or joystick events are a little trickier.
+        // Like key events, generic motion events are delivered to the focused window.
+        // Unlike key events, generic motion events don't tend to transfer focus to other
+        // windows and it is not important for them to be serialized.  So we prefer to deliver
+        // generic motion events as soon as possible to improve efficiency and reduce lag
+        // through batching.
+        //
+        // The one case where we pause input event delivery is when the wait queue is piling
+        // up with lots of events because the application is not responding.
+        // This condition ensures that ANRs are detected reliably.
+        if (!connection->waitQueue.isEmpty()
+                && currentTime >= connection->waitQueue.head->deliveryTime
+                        + STREAM_AHEAD_EVENT_TIMEOUT) {
+            return false;
+        }
+    }
+    return true;
+}
+
+String8 InputDispatcher::getApplicationWindowLabelLocked(
+        const sp<InputApplicationHandle>& applicationHandle,
+        const sp<InputWindowHandle>& windowHandle) {
+    if (applicationHandle != NULL) {
+        if (windowHandle != NULL) {
+            String8 label(applicationHandle->getName());
+            label.append(" - ");
+            label.append(windowHandle->getName());
+            return label;
+        } else {
+            return applicationHandle->getName();
+        }
+    } else if (windowHandle != NULL) {
+        return windowHandle->getName();
+    } else {
+        return String8("<unknown application or window>");
+    }
+}
+
+void InputDispatcher::pokeUserActivityLocked(const EventEntry* eventEntry) {
+    if (mFocusedWindowHandle != NULL) {
+        const InputWindowInfo* info = mFocusedWindowHandle->getInfo();
+        if (info->inputFeatures & InputWindowInfo::INPUT_FEATURE_DISABLE_USER_ACTIVITY) {
+#if DEBUG_DISPATCH_CYCLE
+            ALOGD("Not poking user activity: disabled by window '%s'.", info->name.string());
+#endif
+            return;
+        }
+    }
+
+    int32_t eventType = USER_ACTIVITY_EVENT_OTHER;
+    switch (eventEntry->type) {
+    case EventEntry::TYPE_MOTION: {
+        const MotionEntry* motionEntry = static_cast<const MotionEntry*>(eventEntry);
+        if (motionEntry->action == AMOTION_EVENT_ACTION_CANCEL) {
+            return;
+        }
+
+        if (MotionEvent::isTouchEvent(motionEntry->source, motionEntry->action)) {
+            eventType = USER_ACTIVITY_EVENT_TOUCH;
+        }
+        break;
+    }
+    case EventEntry::TYPE_KEY: {
+        const KeyEntry* keyEntry = static_cast<const KeyEntry*>(eventEntry);
+        if (keyEntry->flags & AKEY_EVENT_FLAG_CANCELED) {
+            return;
+        }
+        eventType = USER_ACTIVITY_EVENT_BUTTON;
+        break;
+    }
+    }
+
+    CommandEntry* commandEntry = postCommandLocked(
+            & InputDispatcher::doPokeUserActivityLockedInterruptible);
+    commandEntry->eventTime = eventEntry->eventTime;
+    commandEntry->userActivityEventType = eventType;
+}
+
+void InputDispatcher::prepareDispatchCycleLocked(nsecs_t currentTime,
+        const sp<Connection>& connection, EventEntry* eventEntry, const InputTarget* inputTarget) {
+#if DEBUG_DISPATCH_CYCLE
+    ALOGD("channel '%s' ~ prepareDispatchCycle - flags=0x%08x, "
+            "xOffset=%f, yOffset=%f, scaleFactor=%f, "
+            "pointerIds=0x%x",
+            connection->getInputChannelName(), inputTarget->flags,
+            inputTarget->xOffset, inputTarget->yOffset,
+            inputTarget->scaleFactor, inputTarget->pointerIds.value);
+#endif
+
+    // Skip this event if the connection status is not normal.
+    // We don't want to enqueue additional outbound events if the connection is broken.
+    if (connection->status != Connection::STATUS_NORMAL) {
+#if DEBUG_DISPATCH_CYCLE
+        ALOGD("channel '%s' ~ Dropping event because the channel status is %s",
+                connection->getInputChannelName(), connection->getStatusLabel());
+#endif
+        return;
+    }
+
+    // Split a motion event if needed.
+    if (inputTarget->flags & InputTarget::FLAG_SPLIT) {
+        ALOG_ASSERT(eventEntry->type == EventEntry::TYPE_MOTION);
+
+        MotionEntry* originalMotionEntry = static_cast<MotionEntry*>(eventEntry);
+        if (inputTarget->pointerIds.count() != originalMotionEntry->pointerCount) {
+            MotionEntry* splitMotionEntry = splitMotionEvent(
+                    originalMotionEntry, inputTarget->pointerIds);
+            if (!splitMotionEntry) {
+                return; // split event was dropped
+            }
+#if DEBUG_FOCUS
+            ALOGD("channel '%s' ~ Split motion event.",
+                    connection->getInputChannelName());
+            logOutboundMotionDetailsLocked("  ", splitMotionEntry);
+#endif
+            enqueueDispatchEntriesLocked(currentTime, connection,
+                    splitMotionEntry, inputTarget);
+            splitMotionEntry->release();
+            return;
+        }
+    }
+
+    // Not splitting.  Enqueue dispatch entries for the event as is.
+    enqueueDispatchEntriesLocked(currentTime, connection, eventEntry, inputTarget);
+}
+
+void InputDispatcher::enqueueDispatchEntriesLocked(nsecs_t currentTime,
+        const sp<Connection>& connection, EventEntry* eventEntry, const InputTarget* inputTarget) {
+    bool wasEmpty = connection->outboundQueue.isEmpty();
+
+    // Enqueue dispatch entries for the requested modes.
+    enqueueDispatchEntryLocked(connection, eventEntry, inputTarget,
+            InputTarget::FLAG_DISPATCH_AS_HOVER_EXIT);
+    enqueueDispatchEntryLocked(connection, eventEntry, inputTarget,
+            InputTarget::FLAG_DISPATCH_AS_OUTSIDE);
+    enqueueDispatchEntryLocked(connection, eventEntry, inputTarget,
+            InputTarget::FLAG_DISPATCH_AS_HOVER_ENTER);
+    enqueueDispatchEntryLocked(connection, eventEntry, inputTarget,
+            InputTarget::FLAG_DISPATCH_AS_IS);
+    enqueueDispatchEntryLocked(connection, eventEntry, inputTarget,
+            InputTarget::FLAG_DISPATCH_AS_SLIPPERY_EXIT);
+    enqueueDispatchEntryLocked(connection, eventEntry, inputTarget,
+            InputTarget::FLAG_DISPATCH_AS_SLIPPERY_ENTER);
+
+    // If the outbound queue was previously empty, start the dispatch cycle going.
+    if (wasEmpty && !connection->outboundQueue.isEmpty()) {
+        startDispatchCycleLocked(currentTime, connection);
+    }
+}
+
+void InputDispatcher::enqueueDispatchEntryLocked(
+        const sp<Connection>& connection, EventEntry* eventEntry, const InputTarget* inputTarget,
+        int32_t dispatchMode) {
+    int32_t inputTargetFlags = inputTarget->flags;
+    if (!(inputTargetFlags & dispatchMode)) {
+        return;
+    }
+    inputTargetFlags = (inputTargetFlags & ~InputTarget::FLAG_DISPATCH_MASK) | dispatchMode;
+
+    // This is a new event.
+    // Enqueue a new dispatch entry onto the outbound queue for this connection.
+    DispatchEntry* dispatchEntry = new DispatchEntry(eventEntry, // increments ref
+            inputTargetFlags, inputTarget->xOffset, inputTarget->yOffset,
+            inputTarget->scaleFactor);
+
+    // Apply target flags and update the connection's input state.
+    switch (eventEntry->type) {
+    case EventEntry::TYPE_KEY: {
+        KeyEntry* keyEntry = static_cast<KeyEntry*>(eventEntry);
+        dispatchEntry->resolvedAction = keyEntry->action;
+        dispatchEntry->resolvedFlags = keyEntry->flags;
+
+        if (!connection->inputState.trackKey(keyEntry,
+                dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags)) {
+#if DEBUG_DISPATCH_CYCLE
+            ALOGD("channel '%s' ~ enqueueDispatchEntryLocked: skipping inconsistent key event",
+                    connection->getInputChannelName());
+#endif
+            delete dispatchEntry;
+            return; // skip the inconsistent event
+        }
+        break;
+    }
+
+    case EventEntry::TYPE_MOTION: {
+        MotionEntry* motionEntry = static_cast<MotionEntry*>(eventEntry);
+        if (dispatchMode & InputTarget::FLAG_DISPATCH_AS_OUTSIDE) {
+            dispatchEntry->resolvedAction = AMOTION_EVENT_ACTION_OUTSIDE;
+        } else if (dispatchMode & InputTarget::FLAG_DISPATCH_AS_HOVER_EXIT) {
+            dispatchEntry->resolvedAction = AMOTION_EVENT_ACTION_HOVER_EXIT;
+        } else if (dispatchMode & InputTarget::FLAG_DISPATCH_AS_HOVER_ENTER) {
+            dispatchEntry->resolvedAction = AMOTION_EVENT_ACTION_HOVER_ENTER;
+        } else if (dispatchMode & InputTarget::FLAG_DISPATCH_AS_SLIPPERY_EXIT) {
+            dispatchEntry->resolvedAction = AMOTION_EVENT_ACTION_CANCEL;
+        } else if (dispatchMode & InputTarget::FLAG_DISPATCH_AS_SLIPPERY_ENTER) {
+            dispatchEntry->resolvedAction = AMOTION_EVENT_ACTION_DOWN;
+        } else {
+            dispatchEntry->resolvedAction = motionEntry->action;
+        }
+        if (dispatchEntry->resolvedAction == AMOTION_EVENT_ACTION_HOVER_MOVE
+                && !connection->inputState.isHovering(
+                        motionEntry->deviceId, motionEntry->source, motionEntry->displayId)) {
+#if DEBUG_DISPATCH_CYCLE
+        ALOGD("channel '%s' ~ enqueueDispatchEntryLocked: filling in missing hover enter event",
+                connection->getInputChannelName());
+#endif
+            dispatchEntry->resolvedAction = AMOTION_EVENT_ACTION_HOVER_ENTER;
+        }
+
+        dispatchEntry->resolvedFlags = motionEntry->flags;
+        if (dispatchEntry->targetFlags & InputTarget::FLAG_WINDOW_IS_OBSCURED) {
+            dispatchEntry->resolvedFlags |= AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED;
+        }
+
+        if (!connection->inputState.trackMotion(motionEntry,
+                dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags)) {
+#if DEBUG_DISPATCH_CYCLE
+            ALOGD("channel '%s' ~ enqueueDispatchEntryLocked: skipping inconsistent motion event",
+                    connection->getInputChannelName());
+#endif
+            delete dispatchEntry;
+            return; // skip the inconsistent event
+        }
+        break;
+    }
+    }
+
+    // Remember that we are waiting for this dispatch to complete.
+    if (dispatchEntry->hasForegroundTarget()) {
+        incrementPendingForegroundDispatchesLocked(eventEntry);
+    }
+
+    // Enqueue the dispatch entry.
+    connection->outboundQueue.enqueueAtTail(dispatchEntry);
+    traceOutboundQueueLengthLocked(connection);
+}
+
+void InputDispatcher::startDispatchCycleLocked(nsecs_t currentTime,
+        const sp<Connection>& connection) {
+#if DEBUG_DISPATCH_CYCLE
+    ALOGD("channel '%s' ~ startDispatchCycle",
+            connection->getInputChannelName());
+#endif
+
+    while (connection->status == Connection::STATUS_NORMAL
+            && !connection->outboundQueue.isEmpty()) {
+        DispatchEntry* dispatchEntry = connection->outboundQueue.head;
+        dispatchEntry->deliveryTime = currentTime;
+
+        // Publish the event.
+        status_t status;
+        EventEntry* eventEntry = dispatchEntry->eventEntry;
+        switch (eventEntry->type) {
+        case EventEntry::TYPE_KEY: {
+            KeyEntry* keyEntry = static_cast<KeyEntry*>(eventEntry);
+
+            // Publish the key event.
+            status = connection->inputPublisher.publishKeyEvent(dispatchEntry->seq,
+                    keyEntry->deviceId, keyEntry->source,
+                    dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags,
+                    keyEntry->keyCode, keyEntry->scanCode,
+                    keyEntry->metaState, keyEntry->repeatCount, keyEntry->downTime,
+                    keyEntry->eventTime);
+            break;
+        }
+
+        case EventEntry::TYPE_MOTION: {
+            MotionEntry* motionEntry = static_cast<MotionEntry*>(eventEntry);
+
+            PointerCoords scaledCoords[MAX_POINTERS];
+            const PointerCoords* usingCoords = motionEntry->pointerCoords;
+
+            // Set the X and Y offset depending on the input source.
+            float xOffset, yOffset, scaleFactor;
+            if ((motionEntry->source & AINPUT_SOURCE_CLASS_POINTER)
+                    && !(dispatchEntry->targetFlags & InputTarget::FLAG_ZERO_COORDS)) {
+                scaleFactor = dispatchEntry->scaleFactor;
+                xOffset = dispatchEntry->xOffset * scaleFactor;
+                yOffset = dispatchEntry->yOffset * scaleFactor;
+                if (scaleFactor != 1.0f) {
+                    for (size_t i = 0; i < motionEntry->pointerCount; i++) {
+                        scaledCoords[i] = motionEntry->pointerCoords[i];
+                        scaledCoords[i].scale(scaleFactor);
+                    }
+                    usingCoords = scaledCoords;
+                }
+            } else {
+                xOffset = 0.0f;
+                yOffset = 0.0f;
+                scaleFactor = 1.0f;
+
+                // We don't want the dispatch target to know.
+                if (dispatchEntry->targetFlags & InputTarget::FLAG_ZERO_COORDS) {
+                    for (size_t i = 0; i < motionEntry->pointerCount; i++) {
+                        scaledCoords[i].clear();
+                    }
+                    usingCoords = scaledCoords;
+                }
+            }
+
+            // Publish the motion event.
+            status = connection->inputPublisher.publishMotionEvent(dispatchEntry->seq,
+                    motionEntry->deviceId, motionEntry->source,
+                    dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags,
+                    motionEntry->edgeFlags, motionEntry->metaState, motionEntry->buttonState,
+                    xOffset, yOffset,
+                    motionEntry->xPrecision, motionEntry->yPrecision,
+                    motionEntry->downTime, motionEntry->eventTime,
+                    motionEntry->pointerCount, motionEntry->pointerProperties,
+                    usingCoords);
+            break;
+        }
+
+        default:
+            ALOG_ASSERT(false);
+            return;
+        }
+
+        // Check the result.
+        if (status) {
+            if (status == WOULD_BLOCK) {
+                if (connection->waitQueue.isEmpty()) {
+                    ALOGE("channel '%s' ~ Could not publish event because the pipe is full. "
+                            "This is unexpected because the wait queue is empty, so the pipe "
+                            "should be empty and we shouldn't have any problems writing an "
+                            "event to it, status=%d", connection->getInputChannelName(), status);
+                    abortBrokenDispatchCycleLocked(currentTime, connection, true /*notify*/);
+                } else {
+                    // Pipe is full and we are waiting for the app to finish process some events
+                    // before sending more events to it.
+#if DEBUG_DISPATCH_CYCLE
+                    ALOGD("channel '%s' ~ Could not publish event because the pipe is full, "
+                            "waiting for the application to catch up",
+                            connection->getInputChannelName());
+#endif
+                    connection->inputPublisherBlocked = true;
+                }
+            } else {
+                ALOGE("channel '%s' ~ Could not publish event due to an unexpected error, "
+                        "status=%d", connection->getInputChannelName(), status);
+                abortBrokenDispatchCycleLocked(currentTime, connection, true /*notify*/);
+            }
+            return;
+        }
+
+        // Re-enqueue the event on the wait queue.
+        connection->outboundQueue.dequeue(dispatchEntry);
+        traceOutboundQueueLengthLocked(connection);
+        connection->waitQueue.enqueueAtTail(dispatchEntry);
+        traceWaitQueueLengthLocked(connection);
+    }
+}
+
+void InputDispatcher::finishDispatchCycleLocked(nsecs_t currentTime,
+        const sp<Connection>& connection, uint32_t seq, bool handled) {
+#if DEBUG_DISPATCH_CYCLE
+    ALOGD("channel '%s' ~ finishDispatchCycle - seq=%u, handled=%s",
+            connection->getInputChannelName(), seq, toString(handled));
+#endif
+
+    connection->inputPublisherBlocked = false;
+
+    if (connection->status == Connection::STATUS_BROKEN
+            || connection->status == Connection::STATUS_ZOMBIE) {
+        return;
+    }
+
+    // Notify other system components and prepare to start the next dispatch cycle.
+    onDispatchCycleFinishedLocked(currentTime, connection, seq, handled);
+}
+
+void InputDispatcher::abortBrokenDispatchCycleLocked(nsecs_t currentTime,
+        const sp<Connection>& connection, bool notify) {
+#if DEBUG_DISPATCH_CYCLE
+    ALOGD("channel '%s' ~ abortBrokenDispatchCycle - notify=%s",
+            connection->getInputChannelName(), toString(notify));
+#endif
+
+    // Clear the dispatch queues.
+    drainDispatchQueueLocked(&connection->outboundQueue);
+    traceOutboundQueueLengthLocked(connection);
+    drainDispatchQueueLocked(&connection->waitQueue);
+    traceWaitQueueLengthLocked(connection);
+
+    // The connection appears to be unrecoverably broken.
+    // Ignore already broken or zombie connections.
+    if (connection->status == Connection::STATUS_NORMAL) {
+        connection->status = Connection::STATUS_BROKEN;
+
+        if (notify) {
+            // Notify other system components.
+            onDispatchCycleBrokenLocked(currentTime, connection);
+        }
+    }
+}
+
+void InputDispatcher::drainDispatchQueueLocked(Queue<DispatchEntry>* queue) {
+    while (!queue->isEmpty()) {
+        DispatchEntry* dispatchEntry = queue->dequeueAtHead();
+        releaseDispatchEntryLocked(dispatchEntry);
+    }
+}
+
+void InputDispatcher::releaseDispatchEntryLocked(DispatchEntry* dispatchEntry) {
+    if (dispatchEntry->hasForegroundTarget()) {
+        decrementPendingForegroundDispatchesLocked(dispatchEntry->eventEntry);
+    }
+    delete dispatchEntry;
+}
+
+int InputDispatcher::handleReceiveCallback(int fd, int events, void* data) {
+    InputDispatcher* d = static_cast<InputDispatcher*>(data);
+
+    { // acquire lock
+        AutoMutex _l(d->mLock);
+
+        ssize_t connectionIndex = d->mConnectionsByFd.indexOfKey(fd);
+        if (connectionIndex < 0) {
+            ALOGE("Received spurious receive callback for unknown input channel.  "
+                    "fd=%d, events=0x%x", fd, events);
+            return 0; // remove the callback
+        }
+
+        bool notify;
+        sp<Connection> connection = d->mConnectionsByFd.valueAt(connectionIndex);
+        if (!(events & (ALOOPER_EVENT_ERROR | ALOOPER_EVENT_HANGUP))) {
+            if (!(events & ALOOPER_EVENT_INPUT)) {
+                ALOGW("channel '%s' ~ Received spurious callback for unhandled poll event.  "
+                        "events=0x%x", connection->getInputChannelName(), events);
+                return 1;
+            }
+
+            nsecs_t currentTime = now();
+            bool gotOne = false;
+            status_t status;
+            for (;;) {
+                uint32_t seq;
+                bool handled;
+                status = connection->inputPublisher.receiveFinishedSignal(&seq, &handled);
+                if (status) {
+                    break;
+                }
+                d->finishDispatchCycleLocked(currentTime, connection, seq, handled);
+                gotOne = true;
+            }
+            if (gotOne) {
+                d->runCommandsLockedInterruptible();
+                if (status == WOULD_BLOCK) {
+                    return 1;
+                }
+            }
+
+            notify = status != DEAD_OBJECT || !connection->monitor;
+            if (notify) {
+                ALOGE("channel '%s' ~ Failed to receive finished signal.  status=%d",
+                        connection->getInputChannelName(), status);
+            }
+        } else {
+            // Monitor channels are never explicitly unregistered.
+            // We do it automatically when the remote endpoint is closed so don't warn
+            // about them.
+            notify = !connection->monitor;
+            if (notify) {
+                ALOGW("channel '%s' ~ Consumer closed input channel or an error occurred.  "
+                        "events=0x%x", connection->getInputChannelName(), events);
+            }
+        }
+
+        // Unregister the channel.
+        d->unregisterInputChannelLocked(connection->inputChannel, notify);
+        return 0; // remove the callback
+    } // release lock
+}
+
+void InputDispatcher::synthesizeCancelationEventsForAllConnectionsLocked(
+        const CancelationOptions& options) {
+    for (size_t i = 0; i < mConnectionsByFd.size(); i++) {
+        synthesizeCancelationEventsForConnectionLocked(
+                mConnectionsByFd.valueAt(i), options);
+    }
+}
+
+void InputDispatcher::synthesizeCancelationEventsForInputChannelLocked(
+        const sp<InputChannel>& channel, const CancelationOptions& options) {
+    ssize_t index = getConnectionIndexLocked(channel);
+    if (index >= 0) {
+        synthesizeCancelationEventsForConnectionLocked(
+                mConnectionsByFd.valueAt(index), options);
+    }
+}
+
+void InputDispatcher::synthesizeCancelationEventsForConnectionLocked(
+        const sp<Connection>& connection, const CancelationOptions& options) {
+    if (connection->status == Connection::STATUS_BROKEN) {
+        return;
+    }
+
+    nsecs_t currentTime = now();
+
+    Vector<EventEntry*> cancelationEvents;
+    connection->inputState.synthesizeCancelationEvents(currentTime,
+            cancelationEvents, options);
+
+    if (!cancelationEvents.isEmpty()) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+        ALOGD("channel '%s' ~ Synthesized %d cancelation events to bring channel back in sync "
+                "with reality: %s, mode=%d.",
+                connection->getInputChannelName(), cancelationEvents.size(),
+                options.reason, options.mode);
+#endif
+        for (size_t i = 0; i < cancelationEvents.size(); i++) {
+            EventEntry* cancelationEventEntry = cancelationEvents.itemAt(i);
+            switch (cancelationEventEntry->type) {
+            case EventEntry::TYPE_KEY:
+                logOutboundKeyDetailsLocked("cancel - ",
+                        static_cast<KeyEntry*>(cancelationEventEntry));
+                break;
+            case EventEntry::TYPE_MOTION:
+                logOutboundMotionDetailsLocked("cancel - ",
+                        static_cast<MotionEntry*>(cancelationEventEntry));
+                break;
+            }
+
+            InputTarget target;
+            sp<InputWindowHandle> windowHandle = getWindowHandleLocked(connection->inputChannel);
+            if (windowHandle != NULL) {
+                const InputWindowInfo* windowInfo = windowHandle->getInfo();
+                target.xOffset = -windowInfo->frameLeft;
+                target.yOffset = -windowInfo->frameTop;
+                target.scaleFactor = windowInfo->scaleFactor;
+            } else {
+                target.xOffset = 0;
+                target.yOffset = 0;
+                target.scaleFactor = 1.0f;
+            }
+            target.inputChannel = connection->inputChannel;
+            target.flags = InputTarget::FLAG_DISPATCH_AS_IS;
+
+            enqueueDispatchEntryLocked(connection, cancelationEventEntry, // increments ref
+                    &target, InputTarget::FLAG_DISPATCH_AS_IS);
+
+            cancelationEventEntry->release();
+        }
+
+        startDispatchCycleLocked(currentTime, connection);
+    }
+}
+
+InputDispatcher::MotionEntry*
+InputDispatcher::splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet32 pointerIds) {
+    ALOG_ASSERT(pointerIds.value != 0);
+
+    uint32_t splitPointerIndexMap[MAX_POINTERS];
+    PointerProperties splitPointerProperties[MAX_POINTERS];
+    PointerCoords splitPointerCoords[MAX_POINTERS];
+
+    uint32_t originalPointerCount = originalMotionEntry->pointerCount;
+    uint32_t splitPointerCount = 0;
+
+    for (uint32_t originalPointerIndex = 0; originalPointerIndex < originalPointerCount;
+            originalPointerIndex++) {
+        const PointerProperties& pointerProperties =
+                originalMotionEntry->pointerProperties[originalPointerIndex];
+        uint32_t pointerId = uint32_t(pointerProperties.id);
+        if (pointerIds.hasBit(pointerId)) {
+            splitPointerIndexMap[splitPointerCount] = originalPointerIndex;
+            splitPointerProperties[splitPointerCount].copyFrom(pointerProperties);
+            splitPointerCoords[splitPointerCount].copyFrom(
+                    originalMotionEntry->pointerCoords[originalPointerIndex]);
+            splitPointerCount += 1;
+        }
+    }
+
+    if (splitPointerCount != pointerIds.count()) {
+        // This is bad.  We are missing some of the pointers that we expected to deliver.
+        // Most likely this indicates that we received an ACTION_MOVE events that has
+        // different pointer ids than we expected based on the previous ACTION_DOWN
+        // or ACTION_POINTER_DOWN events that caused us to decide to split the pointers
+        // in this way.
+        ALOGW("Dropping split motion event because the pointer count is %d but "
+                "we expected there to be %d pointers.  This probably means we received "
+                "a broken sequence of pointer ids from the input device.",
+                splitPointerCount, pointerIds.count());
+        return NULL;
+    }
+
+    int32_t action = originalMotionEntry->action;
+    int32_t maskedAction = action & AMOTION_EVENT_ACTION_MASK;
+    if (maskedAction == AMOTION_EVENT_ACTION_POINTER_DOWN
+            || maskedAction == AMOTION_EVENT_ACTION_POINTER_UP) {
+        int32_t originalPointerIndex = getMotionEventActionPointerIndex(action);
+        const PointerProperties& pointerProperties =
+                originalMotionEntry->pointerProperties[originalPointerIndex];
+        uint32_t pointerId = uint32_t(pointerProperties.id);
+        if (pointerIds.hasBit(pointerId)) {
+            if (pointerIds.count() == 1) {
+                // The first/last pointer went down/up.
+                action = maskedAction == AMOTION_EVENT_ACTION_POINTER_DOWN
+                        ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
+            } else {
+                // A secondary pointer went down/up.
+                uint32_t splitPointerIndex = 0;
+                while (pointerId != uint32_t(splitPointerProperties[splitPointerIndex].id)) {
+                    splitPointerIndex += 1;
+                }
+                action = maskedAction | (splitPointerIndex
+                        << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
+            }
+        } else {
+            // An unrelated pointer changed.
+            action = AMOTION_EVENT_ACTION_MOVE;
+        }
+    }
+
+    MotionEntry* splitMotionEntry = new MotionEntry(
+            originalMotionEntry->eventTime,
+            originalMotionEntry->deviceId,
+            originalMotionEntry->source,
+            originalMotionEntry->policyFlags,
+            action,
+            originalMotionEntry->flags,
+            originalMotionEntry->metaState,
+            originalMotionEntry->buttonState,
+            originalMotionEntry->edgeFlags,
+            originalMotionEntry->xPrecision,
+            originalMotionEntry->yPrecision,
+            originalMotionEntry->downTime,
+            originalMotionEntry->displayId,
+            splitPointerCount, splitPointerProperties, splitPointerCoords);
+
+    if (originalMotionEntry->injectionState) {
+        splitMotionEntry->injectionState = originalMotionEntry->injectionState;
+        splitMotionEntry->injectionState->refCount += 1;
+    }
+
+    return splitMotionEntry;
+}
+
+void InputDispatcher::notifyConfigurationChanged(const NotifyConfigurationChangedArgs* args) {
+#if DEBUG_INBOUND_EVENT_DETAILS
+    ALOGD("notifyConfigurationChanged - eventTime=%lld", args->eventTime);
+#endif
+
+    bool needWake;
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        ConfigurationChangedEntry* newEntry = new ConfigurationChangedEntry(args->eventTime);
+        needWake = enqueueInboundEventLocked(newEntry);
+    } // release lock
+
+    if (needWake) {
+        mLooper->wake();
+    }
+}
+
+void InputDispatcher::notifyKey(const NotifyKeyArgs* args) {
+#if DEBUG_INBOUND_EVENT_DETAILS
+    ALOGD("notifyKey - eventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, action=0x%x, "
+            "flags=0x%x, keyCode=0x%x, scanCode=0x%x, metaState=0x%x, downTime=%lld",
+            args->eventTime, args->deviceId, args->source, args->policyFlags,
+            args->action, args->flags, args->keyCode, args->scanCode,
+            args->metaState, args->downTime);
+#endif
+    if (!validateKeyEvent(args->action)) {
+        return;
+    }
+
+    uint32_t policyFlags = args->policyFlags;
+    int32_t flags = args->flags;
+    int32_t metaState = args->metaState;
+    if ((policyFlags & POLICY_FLAG_VIRTUAL) || (flags & AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY)) {
+        policyFlags |= POLICY_FLAG_VIRTUAL;
+        flags |= AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY;
+    }
+    if (policyFlags & POLICY_FLAG_ALT) {
+        metaState |= AMETA_ALT_ON | AMETA_ALT_LEFT_ON;
+    }
+    if (policyFlags & POLICY_FLAG_ALT_GR) {
+        metaState |= AMETA_ALT_ON | AMETA_ALT_RIGHT_ON;
+    }
+    if (policyFlags & POLICY_FLAG_SHIFT) {
+        metaState |= AMETA_SHIFT_ON | AMETA_SHIFT_LEFT_ON;
+    }
+    if (policyFlags & POLICY_FLAG_CAPS_LOCK) {
+        metaState |= AMETA_CAPS_LOCK_ON;
+    }
+    if (policyFlags & POLICY_FLAG_FUNCTION) {
+        metaState |= AMETA_FUNCTION_ON;
+    }
+
+    policyFlags |= POLICY_FLAG_TRUSTED;
+
+    KeyEvent event;
+    event.initialize(args->deviceId, args->source, args->action,
+            flags, args->keyCode, args->scanCode, metaState, 0,
+            args->downTime, args->eventTime);
+
+    mPolicy->interceptKeyBeforeQueueing(&event, /*byref*/ policyFlags);
+
+    if (policyFlags & POLICY_FLAG_WOKE_HERE) {
+        flags |= AKEY_EVENT_FLAG_WOKE_HERE;
+    }
+
+    bool needWake;
+    { // acquire lock
+        mLock.lock();
+
+        if (shouldSendKeyToInputFilterLocked(args)) {
+            mLock.unlock();
+
+            policyFlags |= POLICY_FLAG_FILTERED;
+            if (!mPolicy->filterInputEvent(&event, policyFlags)) {
+                return; // event was consumed by the filter
+            }
+
+            mLock.lock();
+        }
+
+        int32_t repeatCount = 0;
+        KeyEntry* newEntry = new KeyEntry(args->eventTime,
+                args->deviceId, args->source, policyFlags,
+                args->action, flags, args->keyCode, args->scanCode,
+                metaState, repeatCount, args->downTime);
+
+        needWake = enqueueInboundEventLocked(newEntry);
+        mLock.unlock();
+    } // release lock
+
+    if (needWake) {
+        mLooper->wake();
+    }
+}
+
+bool InputDispatcher::shouldSendKeyToInputFilterLocked(const NotifyKeyArgs* args) {
+    return mInputFilterEnabled;
+}
+
+void InputDispatcher::notifyMotion(const NotifyMotionArgs* args) {
+#if DEBUG_INBOUND_EVENT_DETAILS
+    ALOGD("notifyMotion - eventTime=%lld, deviceId=%d, source=0x%x, policyFlags=0x%x, "
+            "action=0x%x, flags=0x%x, metaState=0x%x, buttonState=0x%x, edgeFlags=0x%x, "
+            "xPrecision=%f, yPrecision=%f, downTime=%lld",
+            args->eventTime, args->deviceId, args->source, args->policyFlags,
+            args->action, args->flags, args->metaState, args->buttonState,
+            args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime);
+    for (uint32_t i = 0; i < args->pointerCount; i++) {
+        ALOGD("  Pointer %d: id=%d, toolType=%d, "
+                "x=%f, y=%f, pressure=%f, size=%f, "
+                "touchMajor=%f, touchMinor=%f, toolMajor=%f, toolMinor=%f, "
+                "orientation=%f",
+                i, args->pointerProperties[i].id,
+                args->pointerProperties[i].toolType,
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_X),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_Y),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_SIZE),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
+                args->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION));
+    }
+#endif
+    if (!validateMotionEvent(args->action, args->pointerCount, args->pointerProperties)) {
+        return;
+    }
+
+    uint32_t policyFlags = args->policyFlags;
+    policyFlags |= POLICY_FLAG_TRUSTED;
+    mPolicy->interceptMotionBeforeQueueing(args->eventTime, /*byref*/ policyFlags);
+
+    bool needWake;
+    { // acquire lock
+        mLock.lock();
+
+        if (shouldSendMotionToInputFilterLocked(args)) {
+            mLock.unlock();
+
+            MotionEvent event;
+            event.initialize(args->deviceId, args->source, args->action, args->flags,
+                    args->edgeFlags, args->metaState, args->buttonState, 0, 0,
+                    args->xPrecision, args->yPrecision,
+                    args->downTime, args->eventTime,
+                    args->pointerCount, args->pointerProperties, args->pointerCoords);
+
+            policyFlags |= POLICY_FLAG_FILTERED;
+            if (!mPolicy->filterInputEvent(&event, policyFlags)) {
+                return; // event was consumed by the filter
+            }
+
+            mLock.lock();
+        }
+
+        // Just enqueue a new motion event.
+        MotionEntry* newEntry = new MotionEntry(args->eventTime,
+                args->deviceId, args->source, policyFlags,
+                args->action, args->flags, args->metaState, args->buttonState,
+                args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime,
+                args->displayId,
+                args->pointerCount, args->pointerProperties, args->pointerCoords);
+
+        needWake = enqueueInboundEventLocked(newEntry);
+        mLock.unlock();
+    } // release lock
+
+    if (needWake) {
+        mLooper->wake();
+    }
+}
+
+bool InputDispatcher::shouldSendMotionToInputFilterLocked(const NotifyMotionArgs* args) {
+    // TODO: support sending secondary display events to input filter
+    return mInputFilterEnabled && isMainDisplay(args->displayId);
+}
+
+void InputDispatcher::notifySwitch(const NotifySwitchArgs* args) {
+#if DEBUG_INBOUND_EVENT_DETAILS
+    ALOGD("notifySwitch - eventTime=%lld, policyFlags=0x%x, switchValues=0x%08x, switchMask=0x%08x",
+            args->eventTime, args->policyFlags,
+            args->switchValues, args->switchMask);
+#endif
+
+    uint32_t policyFlags = args->policyFlags;
+    policyFlags |= POLICY_FLAG_TRUSTED;
+    mPolicy->notifySwitch(args->eventTime,
+            args->switchValues, args->switchMask, policyFlags);
+}
+
+void InputDispatcher::notifyDeviceReset(const NotifyDeviceResetArgs* args) {
+#if DEBUG_INBOUND_EVENT_DETAILS
+    ALOGD("notifyDeviceReset - eventTime=%lld, deviceId=%d",
+            args->eventTime, args->deviceId);
+#endif
+
+    bool needWake;
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        DeviceResetEntry* newEntry = new DeviceResetEntry(args->eventTime, args->deviceId);
+        needWake = enqueueInboundEventLocked(newEntry);
+    } // release lock
+
+    if (needWake) {
+        mLooper->wake();
+    }
+}
+
+int32_t InputDispatcher::injectInputEvent(const InputEvent* event,
+        int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis,
+        uint32_t policyFlags) {
+#if DEBUG_INBOUND_EVENT_DETAILS
+    ALOGD("injectInputEvent - eventType=%d, injectorPid=%d, injectorUid=%d, "
+            "syncMode=%d, timeoutMillis=%d, policyFlags=0x%08x",
+            event->getType(), injectorPid, injectorUid, syncMode, timeoutMillis, policyFlags);
+#endif
+
+    nsecs_t endTime = now() + milliseconds_to_nanoseconds(timeoutMillis);
+
+    policyFlags |= POLICY_FLAG_INJECTED;
+    if (hasInjectionPermission(injectorPid, injectorUid)) {
+        policyFlags |= POLICY_FLAG_TRUSTED;
+    }
+
+    EventEntry* firstInjectedEntry;
+    EventEntry* lastInjectedEntry;
+    switch (event->getType()) {
+    case AINPUT_EVENT_TYPE_KEY: {
+        const KeyEvent* keyEvent = static_cast<const KeyEvent*>(event);
+        int32_t action = keyEvent->getAction();
+        if (! validateKeyEvent(action)) {
+            return INPUT_EVENT_INJECTION_FAILED;
+        }
+
+        int32_t flags = keyEvent->getFlags();
+        if (flags & AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY) {
+            policyFlags |= POLICY_FLAG_VIRTUAL;
+        }
+
+        if (!(policyFlags & POLICY_FLAG_FILTERED)) {
+            mPolicy->interceptKeyBeforeQueueing(keyEvent, /*byref*/ policyFlags);
+        }
+
+        if (policyFlags & POLICY_FLAG_WOKE_HERE) {
+            flags |= AKEY_EVENT_FLAG_WOKE_HERE;
+        }
+
+        mLock.lock();
+        firstInjectedEntry = new KeyEntry(keyEvent->getEventTime(),
+                keyEvent->getDeviceId(), keyEvent->getSource(),
+                policyFlags, action, flags,
+                keyEvent->getKeyCode(), keyEvent->getScanCode(), keyEvent->getMetaState(),
+                keyEvent->getRepeatCount(), keyEvent->getDownTime());
+        lastInjectedEntry = firstInjectedEntry;
+        break;
+    }
+
+    case AINPUT_EVENT_TYPE_MOTION: {
+        const MotionEvent* motionEvent = static_cast<const MotionEvent*>(event);
+        int32_t displayId = ADISPLAY_ID_DEFAULT;
+        int32_t action = motionEvent->getAction();
+        size_t pointerCount = motionEvent->getPointerCount();
+        const PointerProperties* pointerProperties = motionEvent->getPointerProperties();
+        if (! validateMotionEvent(action, pointerCount, pointerProperties)) {
+            return INPUT_EVENT_INJECTION_FAILED;
+        }
+
+        if (!(policyFlags & POLICY_FLAG_FILTERED)) {
+            nsecs_t eventTime = motionEvent->getEventTime();
+            mPolicy->interceptMotionBeforeQueueing(eventTime, /*byref*/ policyFlags);
+        }
+
+        mLock.lock();
+        const nsecs_t* sampleEventTimes = motionEvent->getSampleEventTimes();
+        const PointerCoords* samplePointerCoords = motionEvent->getSamplePointerCoords();
+        firstInjectedEntry = new MotionEntry(*sampleEventTimes,
+                motionEvent->getDeviceId(), motionEvent->getSource(), policyFlags,
+                action, motionEvent->getFlags(),
+                motionEvent->getMetaState(), motionEvent->getButtonState(),
+                motionEvent->getEdgeFlags(),
+                motionEvent->getXPrecision(), motionEvent->getYPrecision(),
+                motionEvent->getDownTime(), displayId,
+                uint32_t(pointerCount), pointerProperties, samplePointerCoords);
+        lastInjectedEntry = firstInjectedEntry;
+        for (size_t i = motionEvent->getHistorySize(); i > 0; i--) {
+            sampleEventTimes += 1;
+            samplePointerCoords += pointerCount;
+            MotionEntry* nextInjectedEntry = new MotionEntry(*sampleEventTimes,
+                    motionEvent->getDeviceId(), motionEvent->getSource(), policyFlags,
+                    action, motionEvent->getFlags(),
+                    motionEvent->getMetaState(), motionEvent->getButtonState(),
+                    motionEvent->getEdgeFlags(),
+                    motionEvent->getXPrecision(), motionEvent->getYPrecision(),
+                    motionEvent->getDownTime(), displayId,
+                    uint32_t(pointerCount), pointerProperties, samplePointerCoords);
+            lastInjectedEntry->next = nextInjectedEntry;
+            lastInjectedEntry = nextInjectedEntry;
+        }
+        break;
+    }
+
+    default:
+        ALOGW("Cannot inject event of type %d", event->getType());
+        return INPUT_EVENT_INJECTION_FAILED;
+    }
+
+    InjectionState* injectionState = new InjectionState(injectorPid, injectorUid);
+    if (syncMode == INPUT_EVENT_INJECTION_SYNC_NONE) {
+        injectionState->injectionIsAsync = true;
+    }
+
+    injectionState->refCount += 1;
+    lastInjectedEntry->injectionState = injectionState;
+
+    bool needWake = false;
+    for (EventEntry* entry = firstInjectedEntry; entry != NULL; ) {
+        EventEntry* nextEntry = entry->next;
+        needWake |= enqueueInboundEventLocked(entry);
+        entry = nextEntry;
+    }
+
+    mLock.unlock();
+
+    if (needWake) {
+        mLooper->wake();
+    }
+
+    int32_t injectionResult;
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        if (syncMode == INPUT_EVENT_INJECTION_SYNC_NONE) {
+            injectionResult = INPUT_EVENT_INJECTION_SUCCEEDED;
+        } else {
+            for (;;) {
+                injectionResult = injectionState->injectionResult;
+                if (injectionResult != INPUT_EVENT_INJECTION_PENDING) {
+                    break;
+                }
+
+                nsecs_t remainingTimeout = endTime - now();
+                if (remainingTimeout <= 0) {
+#if DEBUG_INJECTION
+                    ALOGD("injectInputEvent - Timed out waiting for injection result "
+                            "to become available.");
+#endif
+                    injectionResult = INPUT_EVENT_INJECTION_TIMED_OUT;
+                    break;
+                }
+
+                mInjectionResultAvailableCondition.waitRelative(mLock, remainingTimeout);
+            }
+
+            if (injectionResult == INPUT_EVENT_INJECTION_SUCCEEDED
+                    && syncMode == INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_FINISHED) {
+                while (injectionState->pendingForegroundDispatches != 0) {
+#if DEBUG_INJECTION
+                    ALOGD("injectInputEvent - Waiting for %d pending foreground dispatches.",
+                            injectionState->pendingForegroundDispatches);
+#endif
+                    nsecs_t remainingTimeout = endTime - now();
+                    if (remainingTimeout <= 0) {
+#if DEBUG_INJECTION
+                    ALOGD("injectInputEvent - Timed out waiting for pending foreground "
+                            "dispatches to finish.");
+#endif
+                        injectionResult = INPUT_EVENT_INJECTION_TIMED_OUT;
+                        break;
+                    }
+
+                    mInjectionSyncFinishedCondition.waitRelative(mLock, remainingTimeout);
+                }
+            }
+        }
+
+        injectionState->release();
+    } // release lock
+
+#if DEBUG_INJECTION
+    ALOGD("injectInputEvent - Finished with result %d.  "
+            "injectorPid=%d, injectorUid=%d",
+            injectionResult, injectorPid, injectorUid);
+#endif
+
+    return injectionResult;
+}
+
+bool InputDispatcher::hasInjectionPermission(int32_t injectorPid, int32_t injectorUid) {
+    return injectorUid == 0
+            || mPolicy->checkInjectEventsPermissionNonReentrant(injectorPid, injectorUid);
+}
+
+void InputDispatcher::setInjectionResultLocked(EventEntry* entry, int32_t injectionResult) {
+    InjectionState* injectionState = entry->injectionState;
+    if (injectionState) {
+#if DEBUG_INJECTION
+        ALOGD("Setting input event injection result to %d.  "
+                "injectorPid=%d, injectorUid=%d",
+                 injectionResult, injectionState->injectorPid, injectionState->injectorUid);
+#endif
+
+        if (injectionState->injectionIsAsync
+                && !(entry->policyFlags & POLICY_FLAG_FILTERED)) {
+            // Log the outcome since the injector did not wait for the injection result.
+            switch (injectionResult) {
+            case INPUT_EVENT_INJECTION_SUCCEEDED:
+                ALOGV("Asynchronous input event injection succeeded.");
+                break;
+            case INPUT_EVENT_INJECTION_FAILED:
+                ALOGW("Asynchronous input event injection failed.");
+                break;
+            case INPUT_EVENT_INJECTION_PERMISSION_DENIED:
+                ALOGW("Asynchronous input event injection permission denied.");
+                break;
+            case INPUT_EVENT_INJECTION_TIMED_OUT:
+                ALOGW("Asynchronous input event injection timed out.");
+                break;
+            }
+        }
+
+        injectionState->injectionResult = injectionResult;
+        mInjectionResultAvailableCondition.broadcast();
+    }
+}
+
+void InputDispatcher::incrementPendingForegroundDispatchesLocked(EventEntry* entry) {
+    InjectionState* injectionState = entry->injectionState;
+    if (injectionState) {
+        injectionState->pendingForegroundDispatches += 1;
+    }
+}
+
+void InputDispatcher::decrementPendingForegroundDispatchesLocked(EventEntry* entry) {
+    InjectionState* injectionState = entry->injectionState;
+    if (injectionState) {
+        injectionState->pendingForegroundDispatches -= 1;
+
+        if (injectionState->pendingForegroundDispatches == 0) {
+            mInjectionSyncFinishedCondition.broadcast();
+        }
+    }
+}
+
+sp<InputWindowHandle> InputDispatcher::getWindowHandleLocked(
+        const sp<InputChannel>& inputChannel) const {
+    size_t numWindows = mWindowHandles.size();
+    for (size_t i = 0; i < numWindows; i++) {
+        const sp<InputWindowHandle>& windowHandle = mWindowHandles.itemAt(i);
+        if (windowHandle->getInputChannel() == inputChannel) {
+            return windowHandle;
+        }
+    }
+    return NULL;
+}
+
+bool InputDispatcher::hasWindowHandleLocked(
+        const sp<InputWindowHandle>& windowHandle) const {
+    size_t numWindows = mWindowHandles.size();
+    for (size_t i = 0; i < numWindows; i++) {
+        if (mWindowHandles.itemAt(i) == windowHandle) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void InputDispatcher::setInputWindows(const Vector<sp<InputWindowHandle> >& inputWindowHandles) {
+#if DEBUG_FOCUS
+    ALOGD("setInputWindows");
+#endif
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        Vector<sp<InputWindowHandle> > oldWindowHandles = mWindowHandles;
+        mWindowHandles = inputWindowHandles;
+
+        sp<InputWindowHandle> newFocusedWindowHandle;
+        bool foundHoveredWindow = false;
+        for (size_t i = 0; i < mWindowHandles.size(); i++) {
+            const sp<InputWindowHandle>& windowHandle = mWindowHandles.itemAt(i);
+            if (!windowHandle->updateInfo() || windowHandle->getInputChannel() == NULL) {
+                mWindowHandles.removeAt(i--);
+                continue;
+            }
+            if (windowHandle->getInfo()->hasFocus) {
+                newFocusedWindowHandle = windowHandle;
+            }
+            if (windowHandle == mLastHoverWindowHandle) {
+                foundHoveredWindow = true;
+            }
+        }
+
+        if (!foundHoveredWindow) {
+            mLastHoverWindowHandle = NULL;
+        }
+
+        if (mFocusedWindowHandle != newFocusedWindowHandle) {
+            if (mFocusedWindowHandle != NULL) {
+#if DEBUG_FOCUS
+                ALOGD("Focus left window: %s",
+                        mFocusedWindowHandle->getName().string());
+#endif
+                sp<InputChannel> focusedInputChannel = mFocusedWindowHandle->getInputChannel();
+                if (focusedInputChannel != NULL) {
+                    CancelationOptions options(CancelationOptions::CANCEL_NON_POINTER_EVENTS,
+                            "focus left window");
+                    synthesizeCancelationEventsForInputChannelLocked(
+                            focusedInputChannel, options);
+                }
+            }
+            if (newFocusedWindowHandle != NULL) {
+#if DEBUG_FOCUS
+                ALOGD("Focus entered window: %s",
+                        newFocusedWindowHandle->getName().string());
+#endif
+            }
+            mFocusedWindowHandle = newFocusedWindowHandle;
+        }
+
+        for (size_t i = 0; i < mTouchState.windows.size(); i++) {
+            TouchedWindow& touchedWindow = mTouchState.windows.editItemAt(i);
+            if (!hasWindowHandleLocked(touchedWindow.windowHandle)) {
+#if DEBUG_FOCUS
+                ALOGD("Touched window was removed: %s",
+                        touchedWindow.windowHandle->getName().string());
+#endif
+                sp<InputChannel> touchedInputChannel =
+                        touchedWindow.windowHandle->getInputChannel();
+                if (touchedInputChannel != NULL) {
+                    CancelationOptions options(CancelationOptions::CANCEL_POINTER_EVENTS,
+                            "touched window was removed");
+                    synthesizeCancelationEventsForInputChannelLocked(
+                            touchedInputChannel, options);
+                }
+                mTouchState.windows.removeAt(i--);
+            }
+        }
+
+        // Release information for windows that are no longer present.
+        // This ensures that unused input channels are released promptly.
+        // Otherwise, they might stick around until the window handle is destroyed
+        // which might not happen until the next GC.
+        for (size_t i = 0; i < oldWindowHandles.size(); i++) {
+            const sp<InputWindowHandle>& oldWindowHandle = oldWindowHandles.itemAt(i);
+            if (!hasWindowHandleLocked(oldWindowHandle)) {
+#if DEBUG_FOCUS
+                ALOGD("Window went away: %s", oldWindowHandle->getName().string());
+#endif
+                oldWindowHandle->releaseInfo();
+            }
+        }
+    } // release lock
+
+    // Wake up poll loop since it may need to make new input dispatching choices.
+    mLooper->wake();
+}
+
+void InputDispatcher::setFocusedApplication(
+        const sp<InputApplicationHandle>& inputApplicationHandle) {
+#if DEBUG_FOCUS
+    ALOGD("setFocusedApplication");
+#endif
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        if (inputApplicationHandle != NULL && inputApplicationHandle->updateInfo()) {
+            if (mFocusedApplicationHandle != inputApplicationHandle) {
+                if (mFocusedApplicationHandle != NULL) {
+                    resetANRTimeoutsLocked();
+                    mFocusedApplicationHandle->releaseInfo();
+                }
+                mFocusedApplicationHandle = inputApplicationHandle;
+            }
+        } else if (mFocusedApplicationHandle != NULL) {
+            resetANRTimeoutsLocked();
+            mFocusedApplicationHandle->releaseInfo();
+            mFocusedApplicationHandle.clear();
+        }
+
+#if DEBUG_FOCUS
+        //logDispatchStateLocked();
+#endif
+    } // release lock
+
+    // Wake up poll loop since it may need to make new input dispatching choices.
+    mLooper->wake();
+}
+
+void InputDispatcher::setInputDispatchMode(bool enabled, bool frozen) {
+#if DEBUG_FOCUS
+    ALOGD("setInputDispatchMode: enabled=%d, frozen=%d", enabled, frozen);
+#endif
+
+    bool changed;
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        if (mDispatchEnabled != enabled || mDispatchFrozen != frozen) {
+            if (mDispatchFrozen && !frozen) {
+                resetANRTimeoutsLocked();
+            }
+
+            if (mDispatchEnabled && !enabled) {
+                resetAndDropEverythingLocked("dispatcher is being disabled");
+            }
+
+            mDispatchEnabled = enabled;
+            mDispatchFrozen = frozen;
+            changed = true;
+        } else {
+            changed = false;
+        }
+
+#if DEBUG_FOCUS
+        //logDispatchStateLocked();
+#endif
+    } // release lock
+
+    if (changed) {
+        // Wake up poll loop since it may need to make new input dispatching choices.
+        mLooper->wake();
+    }
+}
+
+void InputDispatcher::setInputFilterEnabled(bool enabled) {
+#if DEBUG_FOCUS
+    ALOGD("setInputFilterEnabled: enabled=%d", enabled);
+#endif
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        if (mInputFilterEnabled == enabled) {
+            return;
+        }
+
+        mInputFilterEnabled = enabled;
+        resetAndDropEverythingLocked("input filter is being enabled or disabled");
+    } // release lock
+
+    // Wake up poll loop since there might be work to do to drop everything.
+    mLooper->wake();
+}
+
+bool InputDispatcher::transferTouchFocus(const sp<InputChannel>& fromChannel,
+        const sp<InputChannel>& toChannel) {
+#if DEBUG_FOCUS
+    ALOGD("transferTouchFocus: fromChannel=%s, toChannel=%s",
+            fromChannel->getName().string(), toChannel->getName().string());
+#endif
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        sp<InputWindowHandle> fromWindowHandle = getWindowHandleLocked(fromChannel);
+        sp<InputWindowHandle> toWindowHandle = getWindowHandleLocked(toChannel);
+        if (fromWindowHandle == NULL || toWindowHandle == NULL) {
+#if DEBUG_FOCUS
+            ALOGD("Cannot transfer focus because from or to window not found.");
+#endif
+            return false;
+        }
+        if (fromWindowHandle == toWindowHandle) {
+#if DEBUG_FOCUS
+            ALOGD("Trivial transfer to same window.");
+#endif
+            return true;
+        }
+        if (fromWindowHandle->getInfo()->displayId != toWindowHandle->getInfo()->displayId) {
+#if DEBUG_FOCUS
+            ALOGD("Cannot transfer focus because windows are on different displays.");
+#endif
+            return false;
+        }
+
+        bool found = false;
+        for (size_t i = 0; i < mTouchState.windows.size(); i++) {
+            const TouchedWindow& touchedWindow = mTouchState.windows[i];
+            if (touchedWindow.windowHandle == fromWindowHandle) {
+                int32_t oldTargetFlags = touchedWindow.targetFlags;
+                BitSet32 pointerIds = touchedWindow.pointerIds;
+
+                mTouchState.windows.removeAt(i);
+
+                int32_t newTargetFlags = oldTargetFlags
+                        & (InputTarget::FLAG_FOREGROUND
+                                | InputTarget::FLAG_SPLIT | InputTarget::FLAG_DISPATCH_AS_IS);
+                mTouchState.addOrUpdateWindow(toWindowHandle, newTargetFlags, pointerIds);
+
+                found = true;
+                break;
+            }
+        }
+
+        if (! found) {
+#if DEBUG_FOCUS
+            ALOGD("Focus transfer failed because from window did not have focus.");
+#endif
+            return false;
+        }
+
+        ssize_t fromConnectionIndex = getConnectionIndexLocked(fromChannel);
+        ssize_t toConnectionIndex = getConnectionIndexLocked(toChannel);
+        if (fromConnectionIndex >= 0 && toConnectionIndex >= 0) {
+            sp<Connection> fromConnection = mConnectionsByFd.valueAt(fromConnectionIndex);
+            sp<Connection> toConnection = mConnectionsByFd.valueAt(toConnectionIndex);
+
+            fromConnection->inputState.copyPointerStateTo(toConnection->inputState);
+            CancelationOptions options(CancelationOptions::CANCEL_POINTER_EVENTS,
+                    "transferring touch focus from this window to another window");
+            synthesizeCancelationEventsForConnectionLocked(fromConnection, options);
+        }
+
+#if DEBUG_FOCUS
+        logDispatchStateLocked();
+#endif
+    } // release lock
+
+    // Wake up poll loop since it may need to make new input dispatching choices.
+    mLooper->wake();
+    return true;
+}
+
+void InputDispatcher::resetAndDropEverythingLocked(const char* reason) {
+#if DEBUG_FOCUS
+    ALOGD("Resetting and dropping all events (%s).", reason);
+#endif
+
+    CancelationOptions options(CancelationOptions::CANCEL_ALL_EVENTS, reason);
+    synthesizeCancelationEventsForAllConnectionsLocked(options);
+
+    resetKeyRepeatLocked();
+    releasePendingEventLocked();
+    drainInboundQueueLocked();
+    resetANRTimeoutsLocked();
+
+    mTouchState.reset();
+    mLastHoverWindowHandle.clear();
+}
+
+void InputDispatcher::logDispatchStateLocked() {
+    String8 dump;
+    dumpDispatchStateLocked(dump);
+
+    char* text = dump.lockBuffer(dump.size());
+    char* start = text;
+    while (*start != '\0') {
+        char* end = strchr(start, '\n');
+        if (*end == '\n') {
+            *(end++) = '\0';
+        }
+        ALOGD("%s", start);
+        start = end;
+    }
+}
+
+void InputDispatcher::dumpDispatchStateLocked(String8& dump) {
+    dump.appendFormat(INDENT "DispatchEnabled: %d\n", mDispatchEnabled);
+    dump.appendFormat(INDENT "DispatchFrozen: %d\n", mDispatchFrozen);
+
+    if (mFocusedApplicationHandle != NULL) {
+        dump.appendFormat(INDENT "FocusedApplication: name='%s', dispatchingTimeout=%0.3fms\n",
+                mFocusedApplicationHandle->getName().string(),
+                mFocusedApplicationHandle->getDispatchingTimeout(
+                        DEFAULT_INPUT_DISPATCHING_TIMEOUT) / 1000000.0);
+    } else {
+        dump.append(INDENT "FocusedApplication: <null>\n");
+    }
+    dump.appendFormat(INDENT "FocusedWindow: name='%s'\n",
+            mFocusedWindowHandle != NULL ? mFocusedWindowHandle->getName().string() : "<null>");
+
+    dump.appendFormat(INDENT "TouchDown: %s\n", toString(mTouchState.down));
+    dump.appendFormat(INDENT "TouchSplit: %s\n", toString(mTouchState.split));
+    dump.appendFormat(INDENT "TouchDeviceId: %d\n", mTouchState.deviceId);
+    dump.appendFormat(INDENT "TouchSource: 0x%08x\n", mTouchState.source);
+    dump.appendFormat(INDENT "TouchDisplayId: %d\n", mTouchState.displayId);
+    if (!mTouchState.windows.isEmpty()) {
+        dump.append(INDENT "TouchedWindows:\n");
+        for (size_t i = 0; i < mTouchState.windows.size(); i++) {
+            const TouchedWindow& touchedWindow = mTouchState.windows[i];
+            dump.appendFormat(INDENT2 "%d: name='%s', pointerIds=0x%0x, targetFlags=0x%x\n",
+                    i, touchedWindow.windowHandle->getName().string(),
+                    touchedWindow.pointerIds.value,
+                    touchedWindow.targetFlags);
+        }
+    } else {
+        dump.append(INDENT "TouchedWindows: <none>\n");
+    }
+
+    if (!mWindowHandles.isEmpty()) {
+        dump.append(INDENT "Windows:\n");
+        for (size_t i = 0; i < mWindowHandles.size(); i++) {
+            const sp<InputWindowHandle>& windowHandle = mWindowHandles.itemAt(i);
+            const InputWindowInfo* windowInfo = windowHandle->getInfo();
+
+            dump.appendFormat(INDENT2 "%d: name='%s', displayId=%d, "
+                    "paused=%s, hasFocus=%s, hasWallpaper=%s, "
+                    "visible=%s, canReceiveKeys=%s, flags=0x%08x, type=0x%08x, layer=%d, "
+                    "frame=[%d,%d][%d,%d], scale=%f, "
+                    "touchableRegion=",
+                    i, windowInfo->name.string(), windowInfo->displayId,
+                    toString(windowInfo->paused),
+                    toString(windowInfo->hasFocus),
+                    toString(windowInfo->hasWallpaper),
+                    toString(windowInfo->visible),
+                    toString(windowInfo->canReceiveKeys),
+                    windowInfo->layoutParamsFlags, windowInfo->layoutParamsType,
+                    windowInfo->layer,
+                    windowInfo->frameLeft, windowInfo->frameTop,
+                    windowInfo->frameRight, windowInfo->frameBottom,
+                    windowInfo->scaleFactor);
+            dumpRegion(dump, windowInfo->touchableRegion);
+            dump.appendFormat(", inputFeatures=0x%08x", windowInfo->inputFeatures);
+            dump.appendFormat(", ownerPid=%d, ownerUid=%d, dispatchingTimeout=%0.3fms\n",
+                    windowInfo->ownerPid, windowInfo->ownerUid,
+                    windowInfo->dispatchingTimeout / 1000000.0);
+        }
+    } else {
+        dump.append(INDENT "Windows: <none>\n");
+    }
+
+    if (!mMonitoringChannels.isEmpty()) {
+        dump.append(INDENT "MonitoringChannels:\n");
+        for (size_t i = 0; i < mMonitoringChannels.size(); i++) {
+            const sp<InputChannel>& channel = mMonitoringChannels[i];
+            dump.appendFormat(INDENT2 "%d: '%s'\n", i, channel->getName().string());
+        }
+    } else {
+        dump.append(INDENT "MonitoringChannels: <none>\n");
+    }
+
+    nsecs_t currentTime = now();
+
+    // Dump recently dispatched or dropped events from oldest to newest.
+    if (!mRecentQueue.isEmpty()) {
+        dump.appendFormat(INDENT "RecentQueue: length=%u\n", mRecentQueue.count());
+        for (EventEntry* entry = mRecentQueue.head; entry; entry = entry->next) {
+            dump.append(INDENT2);
+            entry->appendDescription(dump);
+            dump.appendFormat(", age=%0.1fms\n",
+                    (currentTime - entry->eventTime) * 0.000001f);
+        }
+    } else {
+        dump.append(INDENT "RecentQueue: <empty>\n");
+    }
+
+    // Dump event currently being dispatched.
+    if (mPendingEvent) {
+        dump.append(INDENT "PendingEvent:\n");
+        dump.append(INDENT2);
+        mPendingEvent->appendDescription(dump);
+        dump.appendFormat(", age=%0.1fms\n",
+                (currentTime - mPendingEvent->eventTime) * 0.000001f);
+    } else {
+        dump.append(INDENT "PendingEvent: <none>\n");
+    }
+
+    // Dump inbound events from oldest to newest.
+    if (!mInboundQueue.isEmpty()) {
+        dump.appendFormat(INDENT "InboundQueue: length=%u\n", mInboundQueue.count());
+        for (EventEntry* entry = mInboundQueue.head; entry; entry = entry->next) {
+            dump.append(INDENT2);
+            entry->appendDescription(dump);
+            dump.appendFormat(", age=%0.1fms\n",
+                    (currentTime - entry->eventTime) * 0.000001f);
+        }
+    } else {
+        dump.append(INDENT "InboundQueue: <empty>\n");
+    }
+
+    if (!mConnectionsByFd.isEmpty()) {
+        dump.append(INDENT "Connections:\n");
+        for (size_t i = 0; i < mConnectionsByFd.size(); i++) {
+            const sp<Connection>& connection = mConnectionsByFd.valueAt(i);
+            dump.appendFormat(INDENT2 "%d: channelName='%s', windowName='%s', "
+                    "status=%s, monitor=%s, inputPublisherBlocked=%s\n",
+                    i, connection->getInputChannelName(), connection->getWindowName(),
+                    connection->getStatusLabel(), toString(connection->monitor),
+                    toString(connection->inputPublisherBlocked));
+
+            if (!connection->outboundQueue.isEmpty()) {
+                dump.appendFormat(INDENT3 "OutboundQueue: length=%u\n",
+                        connection->outboundQueue.count());
+                for (DispatchEntry* entry = connection->outboundQueue.head; entry;
+                        entry = entry->next) {
+                    dump.append(INDENT4);
+                    entry->eventEntry->appendDescription(dump);
+                    dump.appendFormat(", targetFlags=0x%08x, resolvedAction=%d, age=%0.1fms\n",
+                            entry->targetFlags, entry->resolvedAction,
+                            (currentTime - entry->eventEntry->eventTime) * 0.000001f);
+                }
+            } else {
+                dump.append(INDENT3 "OutboundQueue: <empty>\n");
+            }
+
+            if (!connection->waitQueue.isEmpty()) {
+                dump.appendFormat(INDENT3 "WaitQueue: length=%u\n",
+                        connection->waitQueue.count());
+                for (DispatchEntry* entry = connection->waitQueue.head; entry;
+                        entry = entry->next) {
+                    dump.append(INDENT4);
+                    entry->eventEntry->appendDescription(dump);
+                    dump.appendFormat(", targetFlags=0x%08x, resolvedAction=%d, "
+                            "age=%0.1fms, wait=%0.1fms\n",
+                            entry->targetFlags, entry->resolvedAction,
+                            (currentTime - entry->eventEntry->eventTime) * 0.000001f,
+                            (currentTime - entry->deliveryTime) * 0.000001f);
+                }
+            } else {
+                dump.append(INDENT3 "WaitQueue: <empty>\n");
+            }
+        }
+    } else {
+        dump.append(INDENT "Connections: <none>\n");
+    }
+
+    if (isAppSwitchPendingLocked()) {
+        dump.appendFormat(INDENT "AppSwitch: pending, due in %0.1fms\n",
+                (mAppSwitchDueTime - now()) / 1000000.0);
+    } else {
+        dump.append(INDENT "AppSwitch: not pending\n");
+    }
+
+    dump.append(INDENT "Configuration:\n");
+    dump.appendFormat(INDENT2 "KeyRepeatDelay: %0.1fms\n",
+            mConfig.keyRepeatDelay * 0.000001f);
+    dump.appendFormat(INDENT2 "KeyRepeatTimeout: %0.1fms\n",
+            mConfig.keyRepeatTimeout * 0.000001f);
+}
+
+status_t InputDispatcher::registerInputChannel(const sp<InputChannel>& inputChannel,
+        const sp<InputWindowHandle>& inputWindowHandle, bool monitor) {
+#if DEBUG_REGISTRATION
+    ALOGD("channel '%s' ~ registerInputChannel - monitor=%s", inputChannel->getName().string(),
+            toString(monitor));
+#endif
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        if (getConnectionIndexLocked(inputChannel) >= 0) {
+            ALOGW("Attempted to register already registered input channel '%s'",
+                    inputChannel->getName().string());
+            return BAD_VALUE;
+        }
+
+        sp<Connection> connection = new Connection(inputChannel, inputWindowHandle, monitor);
+
+        int fd = inputChannel->getFd();
+        mConnectionsByFd.add(fd, connection);
+
+        if (monitor) {
+            mMonitoringChannels.push(inputChannel);
+        }
+
+        mLooper->addFd(fd, 0, ALOOPER_EVENT_INPUT, handleReceiveCallback, this);
+    } // release lock
+
+    // Wake the looper because some connections have changed.
+    mLooper->wake();
+    return OK;
+}
+
+status_t InputDispatcher::unregisterInputChannel(const sp<InputChannel>& inputChannel) {
+#if DEBUG_REGISTRATION
+    ALOGD("channel '%s' ~ unregisterInputChannel", inputChannel->getName().string());
+#endif
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        status_t status = unregisterInputChannelLocked(inputChannel, false /*notify*/);
+        if (status) {
+            return status;
+        }
+    } // release lock
+
+    // Wake the poll loop because removing the connection may have changed the current
+    // synchronization state.
+    mLooper->wake();
+    return OK;
+}
+
+status_t InputDispatcher::unregisterInputChannelLocked(const sp<InputChannel>& inputChannel,
+        bool notify) {
+    ssize_t connectionIndex = getConnectionIndexLocked(inputChannel);
+    if (connectionIndex < 0) {
+        ALOGW("Attempted to unregister already unregistered input channel '%s'",
+                inputChannel->getName().string());
+        return BAD_VALUE;
+    }
+
+    sp<Connection> connection = mConnectionsByFd.valueAt(connectionIndex);
+    mConnectionsByFd.removeItemsAt(connectionIndex);
+
+    if (connection->monitor) {
+        removeMonitorChannelLocked(inputChannel);
+    }
+
+    mLooper->removeFd(inputChannel->getFd());
+
+    nsecs_t currentTime = now();
+    abortBrokenDispatchCycleLocked(currentTime, connection, notify);
+
+    connection->status = Connection::STATUS_ZOMBIE;
+    return OK;
+}
+
+void InputDispatcher::removeMonitorChannelLocked(const sp<InputChannel>& inputChannel) {
+    for (size_t i = 0; i < mMonitoringChannels.size(); i++) {
+         if (mMonitoringChannels[i] == inputChannel) {
+             mMonitoringChannels.removeAt(i);
+             break;
+         }
+    }
+}
+
+ssize_t InputDispatcher::getConnectionIndexLocked(const sp<InputChannel>& inputChannel) {
+    ssize_t connectionIndex = mConnectionsByFd.indexOfKey(inputChannel->getFd());
+    if (connectionIndex >= 0) {
+        sp<Connection> connection = mConnectionsByFd.valueAt(connectionIndex);
+        if (connection->inputChannel.get() == inputChannel.get()) {
+            return connectionIndex;
+        }
+    }
+
+    return -1;
+}
+
+void InputDispatcher::onDispatchCycleFinishedLocked(
+        nsecs_t currentTime, const sp<Connection>& connection, uint32_t seq, bool handled) {
+    CommandEntry* commandEntry = postCommandLocked(
+            & InputDispatcher::doDispatchCycleFinishedLockedInterruptible);
+    commandEntry->connection = connection;
+    commandEntry->eventTime = currentTime;
+    commandEntry->seq = seq;
+    commandEntry->handled = handled;
+}
+
+void InputDispatcher::onDispatchCycleBrokenLocked(
+        nsecs_t currentTime, const sp<Connection>& connection) {
+    ALOGE("channel '%s' ~ Channel is unrecoverably broken and will be disposed!",
+            connection->getInputChannelName());
+
+    CommandEntry* commandEntry = postCommandLocked(
+            & InputDispatcher::doNotifyInputChannelBrokenLockedInterruptible);
+    commandEntry->connection = connection;
+}
+
+void InputDispatcher::onANRLocked(
+        nsecs_t currentTime, const sp<InputApplicationHandle>& applicationHandle,
+        const sp<InputWindowHandle>& windowHandle,
+        nsecs_t eventTime, nsecs_t waitStartTime, const char* reason) {
+    float dispatchLatency = (currentTime - eventTime) * 0.000001f;
+    float waitDuration = (currentTime - waitStartTime) * 0.000001f;
+    ALOGI("Application is not responding: %s.  "
+            "It has been %0.1fms since event, %0.1fms since wait started.  Reason: %s",
+            getApplicationWindowLabelLocked(applicationHandle, windowHandle).string(),
+            dispatchLatency, waitDuration, reason);
+
+    // Capture a record of the InputDispatcher state at the time of the ANR.
+    time_t t = time(NULL);
+    struct tm tm;
+    localtime_r(&t, &tm);
+    char timestr[64];
+    strftime(timestr, sizeof(timestr), "%F %T", &tm);
+    mLastANRState.clear();
+    mLastANRState.append(INDENT "ANR:\n");
+    mLastANRState.appendFormat(INDENT2 "Time: %s\n", timestr);
+    mLastANRState.appendFormat(INDENT2 "Window: %s\n",
+            getApplicationWindowLabelLocked(applicationHandle, windowHandle).string());
+    mLastANRState.appendFormat(INDENT2 "DispatchLatency: %0.1fms\n", dispatchLatency);
+    mLastANRState.appendFormat(INDENT2 "WaitDuration: %0.1fms\n", waitDuration);
+    mLastANRState.appendFormat(INDENT2 "Reason: %s\n", reason);
+    dumpDispatchStateLocked(mLastANRState);
+
+    CommandEntry* commandEntry = postCommandLocked(
+            & InputDispatcher::doNotifyANRLockedInterruptible);
+    commandEntry->inputApplicationHandle = applicationHandle;
+    commandEntry->inputWindowHandle = windowHandle;
+    commandEntry->reason = reason;
+}
+
+void InputDispatcher::doNotifyConfigurationChangedInterruptible(
+        CommandEntry* commandEntry) {
+    mLock.unlock();
+
+    mPolicy->notifyConfigurationChanged(commandEntry->eventTime);
+
+    mLock.lock();
+}
+
+void InputDispatcher::doNotifyInputChannelBrokenLockedInterruptible(
+        CommandEntry* commandEntry) {
+    sp<Connection> connection = commandEntry->connection;
+
+    if (connection->status != Connection::STATUS_ZOMBIE) {
+        mLock.unlock();
+
+        mPolicy->notifyInputChannelBroken(connection->inputWindowHandle);
+
+        mLock.lock();
+    }
+}
+
+void InputDispatcher::doNotifyANRLockedInterruptible(
+        CommandEntry* commandEntry) {
+    mLock.unlock();
+
+    nsecs_t newTimeout = mPolicy->notifyANR(
+            commandEntry->inputApplicationHandle, commandEntry->inputWindowHandle,
+            commandEntry->reason);
+
+    mLock.lock();
+
+    resumeAfterTargetsNotReadyTimeoutLocked(newTimeout,
+            commandEntry->inputWindowHandle != NULL
+                    ? commandEntry->inputWindowHandle->getInputChannel() : NULL);
+}
+
+void InputDispatcher::doInterceptKeyBeforeDispatchingLockedInterruptible(
+        CommandEntry* commandEntry) {
+    KeyEntry* entry = commandEntry->keyEntry;
+
+    KeyEvent event;
+    initializeKeyEvent(&event, entry);
+
+    mLock.unlock();
+
+    nsecs_t delay = mPolicy->interceptKeyBeforeDispatching(commandEntry->inputWindowHandle,
+            &event, entry->policyFlags);
+
+    mLock.lock();
+
+    if (delay < 0) {
+        entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_SKIP;
+    } else if (!delay) {
+        entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_CONTINUE;
+    } else {
+        entry->interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER;
+        entry->interceptKeyWakeupTime = now() + delay;
+    }
+    entry->release();
+}
+
+void InputDispatcher::doDispatchCycleFinishedLockedInterruptible(
+        CommandEntry* commandEntry) {
+    sp<Connection> connection = commandEntry->connection;
+    nsecs_t finishTime = commandEntry->eventTime;
+    uint32_t seq = commandEntry->seq;
+    bool handled = commandEntry->handled;
+
+    // Handle post-event policy actions.
+    DispatchEntry* dispatchEntry = connection->findWaitQueueEntry(seq);
+    if (dispatchEntry) {
+        nsecs_t eventDuration = finishTime - dispatchEntry->deliveryTime;
+        if (eventDuration > SLOW_EVENT_PROCESSING_WARNING_TIMEOUT) {
+            String8 msg;
+            msg.appendFormat("Window '%s' spent %0.1fms processing the last input event: ",
+                    connection->getWindowName(), eventDuration * 0.000001f);
+            dispatchEntry->eventEntry->appendDescription(msg);
+            ALOGI("%s", msg.string());
+        }
+
+        bool restartEvent;
+        if (dispatchEntry->eventEntry->type == EventEntry::TYPE_KEY) {
+            KeyEntry* keyEntry = static_cast<KeyEntry*>(dispatchEntry->eventEntry);
+            restartEvent = afterKeyEventLockedInterruptible(connection,
+                    dispatchEntry, keyEntry, handled);
+        } else if (dispatchEntry->eventEntry->type == EventEntry::TYPE_MOTION) {
+            MotionEntry* motionEntry = static_cast<MotionEntry*>(dispatchEntry->eventEntry);
+            restartEvent = afterMotionEventLockedInterruptible(connection,
+                    dispatchEntry, motionEntry, handled);
+        } else {
+            restartEvent = false;
+        }
+
+        // Dequeue the event and start the next cycle.
+        // Note that because the lock might have been released, it is possible that the
+        // contents of the wait queue to have been drained, so we need to double-check
+        // a few things.
+        if (dispatchEntry == connection->findWaitQueueEntry(seq)) {
+            connection->waitQueue.dequeue(dispatchEntry);
+            traceWaitQueueLengthLocked(connection);
+            if (restartEvent && connection->status == Connection::STATUS_NORMAL) {
+                connection->outboundQueue.enqueueAtHead(dispatchEntry);
+                traceOutboundQueueLengthLocked(connection);
+            } else {
+                releaseDispatchEntryLocked(dispatchEntry);
+            }
+        }
+
+        // Start the next dispatch cycle for this connection.
+        startDispatchCycleLocked(now(), connection);
+    }
+}
+
+bool InputDispatcher::afterKeyEventLockedInterruptible(const sp<Connection>& connection,
+        DispatchEntry* dispatchEntry, KeyEntry* keyEntry, bool handled) {
+    if (!(keyEntry->flags & AKEY_EVENT_FLAG_FALLBACK)) {
+        // Get the fallback key state.
+        // Clear it out after dispatching the UP.
+        int32_t originalKeyCode = keyEntry->keyCode;
+        int32_t fallbackKeyCode = connection->inputState.getFallbackKey(originalKeyCode);
+        if (keyEntry->action == AKEY_EVENT_ACTION_UP) {
+            connection->inputState.removeFallbackKey(originalKeyCode);
+        }
+
+        if (handled || !dispatchEntry->hasForegroundTarget()) {
+            // If the application handles the original key for which we previously
+            // generated a fallback or if the window is not a foreground window,
+            // then cancel the associated fallback key, if any.
+            if (fallbackKeyCode != -1) {
+                // Dispatch the unhandled key to the policy with the cancel flag.
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+                ALOGD("Unhandled key event: Asking policy to cancel fallback action.  "
+                        "keyCode=%d, action=%d, repeatCount=%d, policyFlags=0x%08x",
+                        keyEntry->keyCode, keyEntry->action, keyEntry->repeatCount,
+                        keyEntry->policyFlags);
+#endif
+                KeyEvent event;
+                initializeKeyEvent(&event, keyEntry);
+                event.setFlags(event.getFlags() | AKEY_EVENT_FLAG_CANCELED);
+
+                mLock.unlock();
+
+                mPolicy->dispatchUnhandledKey(connection->inputWindowHandle,
+                        &event, keyEntry->policyFlags, &event);
+
+                mLock.lock();
+
+                // Cancel the fallback key.
+                if (fallbackKeyCode != AKEYCODE_UNKNOWN) {
+                    CancelationOptions options(CancelationOptions::CANCEL_FALLBACK_EVENTS,
+                            "application handled the original non-fallback key "
+                            "or is no longer a foreground target, "
+                            "canceling previously dispatched fallback key");
+                    options.keyCode = fallbackKeyCode;
+                    synthesizeCancelationEventsForConnectionLocked(connection, options);
+                }
+                connection->inputState.removeFallbackKey(originalKeyCode);
+            }
+        } else {
+            // If the application did not handle a non-fallback key, first check
+            // that we are in a good state to perform unhandled key event processing
+            // Then ask the policy what to do with it.
+            bool initialDown = keyEntry->action == AKEY_EVENT_ACTION_DOWN
+                    && keyEntry->repeatCount == 0;
+            if (fallbackKeyCode == -1 && !initialDown) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+                ALOGD("Unhandled key event: Skipping unhandled key event processing "
+                        "since this is not an initial down.  "
+                        "keyCode=%d, action=%d, repeatCount=%d, policyFlags=0x%08x",
+                        originalKeyCode, keyEntry->action, keyEntry->repeatCount,
+                        keyEntry->policyFlags);
+#endif
+                return false;
+            }
+
+            // Dispatch the unhandled key to the policy.
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+            ALOGD("Unhandled key event: Asking policy to perform fallback action.  "
+                    "keyCode=%d, action=%d, repeatCount=%d, policyFlags=0x%08x",
+                    keyEntry->keyCode, keyEntry->action, keyEntry->repeatCount,
+                    keyEntry->policyFlags);
+#endif
+            KeyEvent event;
+            initializeKeyEvent(&event, keyEntry);
+
+            mLock.unlock();
+
+            bool fallback = mPolicy->dispatchUnhandledKey(connection->inputWindowHandle,
+                    &event, keyEntry->policyFlags, &event);
+
+            mLock.lock();
+
+            if (connection->status != Connection::STATUS_NORMAL) {
+                connection->inputState.removeFallbackKey(originalKeyCode);
+                return false;
+            }
+
+            // Latch the fallback keycode for this key on an initial down.
+            // The fallback keycode cannot change at any other point in the lifecycle.
+            if (initialDown) {
+                if (fallback) {
+                    fallbackKeyCode = event.getKeyCode();
+                } else {
+                    fallbackKeyCode = AKEYCODE_UNKNOWN;
+                }
+                connection->inputState.setFallbackKey(originalKeyCode, fallbackKeyCode);
+            }
+
+            ALOG_ASSERT(fallbackKeyCode != -1);
+
+            // Cancel the fallback key if the policy decides not to send it anymore.
+            // We will continue to dispatch the key to the policy but we will no
+            // longer dispatch a fallback key to the application.
+            if (fallbackKeyCode != AKEYCODE_UNKNOWN
+                    && (!fallback || fallbackKeyCode != event.getKeyCode())) {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+                if (fallback) {
+                    ALOGD("Unhandled key event: Policy requested to send key %d"
+                            "as a fallback for %d, but on the DOWN it had requested "
+                            "to send %d instead.  Fallback canceled.",
+                            event.getKeyCode(), originalKeyCode, fallbackKeyCode);
+                } else {
+                    ALOGD("Unhandled key event: Policy did not request fallback for %d, "
+                            "but on the DOWN it had requested to send %d.  "
+                            "Fallback canceled.",
+                            originalKeyCode, fallbackKeyCode);
+                }
+#endif
+
+                CancelationOptions options(CancelationOptions::CANCEL_FALLBACK_EVENTS,
+                        "canceling fallback, policy no longer desires it");
+                options.keyCode = fallbackKeyCode;
+                synthesizeCancelationEventsForConnectionLocked(connection, options);
+
+                fallback = false;
+                fallbackKeyCode = AKEYCODE_UNKNOWN;
+                if (keyEntry->action != AKEY_EVENT_ACTION_UP) {
+                    connection->inputState.setFallbackKey(originalKeyCode,
+                            fallbackKeyCode);
+                }
+            }
+
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+            {
+                String8 msg;
+                const KeyedVector<int32_t, int32_t>& fallbackKeys =
+                        connection->inputState.getFallbackKeys();
+                for (size_t i = 0; i < fallbackKeys.size(); i++) {
+                    msg.appendFormat(", %d->%d", fallbackKeys.keyAt(i),
+                            fallbackKeys.valueAt(i));
+                }
+                ALOGD("Unhandled key event: %d currently tracked fallback keys%s.",
+                        fallbackKeys.size(), msg.string());
+            }
+#endif
+
+            if (fallback) {
+                // Restart the dispatch cycle using the fallback key.
+                keyEntry->eventTime = event.getEventTime();
+                keyEntry->deviceId = event.getDeviceId();
+                keyEntry->source = event.getSource();
+                keyEntry->flags = event.getFlags() | AKEY_EVENT_FLAG_FALLBACK;
+                keyEntry->keyCode = fallbackKeyCode;
+                keyEntry->scanCode = event.getScanCode();
+                keyEntry->metaState = event.getMetaState();
+                keyEntry->repeatCount = event.getRepeatCount();
+                keyEntry->downTime = event.getDownTime();
+                keyEntry->syntheticRepeat = false;
+
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+                ALOGD("Unhandled key event: Dispatching fallback key.  "
+                        "originalKeyCode=%d, fallbackKeyCode=%d, fallbackMetaState=%08x",
+                        originalKeyCode, fallbackKeyCode, keyEntry->metaState);
+#endif
+                return true; // restart the event
+            } else {
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+                ALOGD("Unhandled key event: No fallback key.");
+#endif
+            }
+        }
+    }
+    return false;
+}
+
+bool InputDispatcher::afterMotionEventLockedInterruptible(const sp<Connection>& connection,
+        DispatchEntry* dispatchEntry, MotionEntry* motionEntry, bool handled) {
+    return false;
+}
+
+void InputDispatcher::doPokeUserActivityLockedInterruptible(CommandEntry* commandEntry) {
+    mLock.unlock();
+
+    mPolicy->pokeUserActivity(commandEntry->eventTime, commandEntry->userActivityEventType);
+
+    mLock.lock();
+}
+
+void InputDispatcher::initializeKeyEvent(KeyEvent* event, const KeyEntry* entry) {
+    event->initialize(entry->deviceId, entry->source, entry->action, entry->flags,
+            entry->keyCode, entry->scanCode, entry->metaState, entry->repeatCount,
+            entry->downTime, entry->eventTime);
+}
+
+void InputDispatcher::updateDispatchStatisticsLocked(nsecs_t currentTime, const EventEntry* entry,
+        int32_t injectionResult, nsecs_t timeSpentWaitingForApplication) {
+    // TODO Write some statistics about how long we spend waiting.
+}
+
+void InputDispatcher::traceInboundQueueLengthLocked() {
+    if (ATRACE_ENABLED()) {
+        ATRACE_INT("iq", mInboundQueue.count());
+    }
+}
+
+void InputDispatcher::traceOutboundQueueLengthLocked(const sp<Connection>& connection) {
+    if (ATRACE_ENABLED()) {
+        char counterName[40];
+        snprintf(counterName, sizeof(counterName), "oq:%s", connection->getWindowName());
+        ATRACE_INT(counterName, connection->outboundQueue.count());
+    }
+}
+
+void InputDispatcher::traceWaitQueueLengthLocked(const sp<Connection>& connection) {
+    if (ATRACE_ENABLED()) {
+        char counterName[40];
+        snprintf(counterName, sizeof(counterName), "wq:%s", connection->getWindowName());
+        ATRACE_INT(counterName, connection->waitQueue.count());
+    }
+}
+
+void InputDispatcher::dump(String8& dump) {
+    AutoMutex _l(mLock);
+
+    dump.append("Input Dispatcher State:\n");
+    dumpDispatchStateLocked(dump);
+
+    if (!mLastANRState.isEmpty()) {
+        dump.append("\nInput Dispatcher State at time of last ANR:\n");
+        dump.append(mLastANRState);
+    }
+}
+
+void InputDispatcher::monitor() {
+    // Acquire and release the lock to ensure that the dispatcher has not deadlocked.
+    mLock.lock();
+    mLooper->wake();
+    mDispatcherIsAliveCondition.wait(mLock);
+    mLock.unlock();
+}
+
+
+// --- InputDispatcher::Queue ---
+
+template <typename T>
+uint32_t InputDispatcher::Queue<T>::count() const {
+    uint32_t result = 0;
+    for (const T* entry = head; entry; entry = entry->next) {
+        result += 1;
+    }
+    return result;
+}
+
+
+// --- InputDispatcher::InjectionState ---
+
+InputDispatcher::InjectionState::InjectionState(int32_t injectorPid, int32_t injectorUid) :
+        refCount(1),
+        injectorPid(injectorPid), injectorUid(injectorUid),
+        injectionResult(INPUT_EVENT_INJECTION_PENDING), injectionIsAsync(false),
+        pendingForegroundDispatches(0) {
+}
+
+InputDispatcher::InjectionState::~InjectionState() {
+}
+
+void InputDispatcher::InjectionState::release() {
+    refCount -= 1;
+    if (refCount == 0) {
+        delete this;
+    } else {
+        ALOG_ASSERT(refCount > 0);
+    }
+}
+
+
+// --- InputDispatcher::EventEntry ---
+
+InputDispatcher::EventEntry::EventEntry(int32_t type, nsecs_t eventTime, uint32_t policyFlags) :
+        refCount(1), type(type), eventTime(eventTime), policyFlags(policyFlags),
+        injectionState(NULL), dispatchInProgress(false) {
+}
+
+InputDispatcher::EventEntry::~EventEntry() {
+    releaseInjectionState();
+}
+
+void InputDispatcher::EventEntry::release() {
+    refCount -= 1;
+    if (refCount == 0) {
+        delete this;
+    } else {
+        ALOG_ASSERT(refCount > 0);
+    }
+}
+
+void InputDispatcher::EventEntry::releaseInjectionState() {
+    if (injectionState) {
+        injectionState->release();
+        injectionState = NULL;
+    }
+}
+
+
+// --- InputDispatcher::ConfigurationChangedEntry ---
+
+InputDispatcher::ConfigurationChangedEntry::ConfigurationChangedEntry(nsecs_t eventTime) :
+        EventEntry(TYPE_CONFIGURATION_CHANGED, eventTime, 0) {
+}
+
+InputDispatcher::ConfigurationChangedEntry::~ConfigurationChangedEntry() {
+}
+
+void InputDispatcher::ConfigurationChangedEntry::appendDescription(String8& msg) const {
+    msg.append("ConfigurationChangedEvent(), policyFlags=0x%08x",
+            policyFlags);
+}
+
+
+// --- InputDispatcher::DeviceResetEntry ---
+
+InputDispatcher::DeviceResetEntry::DeviceResetEntry(nsecs_t eventTime, int32_t deviceId) :
+        EventEntry(TYPE_DEVICE_RESET, eventTime, 0),
+        deviceId(deviceId) {
+}
+
+InputDispatcher::DeviceResetEntry::~DeviceResetEntry() {
+}
+
+void InputDispatcher::DeviceResetEntry::appendDescription(String8& msg) const {
+    msg.appendFormat("DeviceResetEvent(deviceId=%d), policyFlags=0x%08x",
+            deviceId, policyFlags);
+}
+
+
+// --- InputDispatcher::KeyEntry ---
+
+InputDispatcher::KeyEntry::KeyEntry(nsecs_t eventTime,
+        int32_t deviceId, uint32_t source, uint32_t policyFlags, int32_t action,
+        int32_t flags, int32_t keyCode, int32_t scanCode, int32_t metaState,
+        int32_t repeatCount, nsecs_t downTime) :
+        EventEntry(TYPE_KEY, eventTime, policyFlags),
+        deviceId(deviceId), source(source), action(action), flags(flags),
+        keyCode(keyCode), scanCode(scanCode), metaState(metaState),
+        repeatCount(repeatCount), downTime(downTime),
+        syntheticRepeat(false), interceptKeyResult(KeyEntry::INTERCEPT_KEY_RESULT_UNKNOWN),
+        interceptKeyWakeupTime(0) {
+}
+
+InputDispatcher::KeyEntry::~KeyEntry() {
+}
+
+void InputDispatcher::KeyEntry::appendDescription(String8& msg) const {
+    msg.appendFormat("KeyEvent(deviceId=%d, source=0x%08x, action=%d, "
+            "flags=0x%08x, keyCode=%d, scanCode=%d, metaState=0x%08x, "
+            "repeatCount=%d), policyFlags=0x%08x",
+            deviceId, source, action, flags, keyCode, scanCode, metaState,
+            repeatCount, policyFlags);
+}
+
+void InputDispatcher::KeyEntry::recycle() {
+    releaseInjectionState();
+
+    dispatchInProgress = false;
+    syntheticRepeat = false;
+    interceptKeyResult = KeyEntry::INTERCEPT_KEY_RESULT_UNKNOWN;
+    interceptKeyWakeupTime = 0;
+}
+
+
+// --- InputDispatcher::MotionEntry ---
+
+InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime,
+        int32_t deviceId, uint32_t source, uint32_t policyFlags, int32_t action, int32_t flags,
+        int32_t metaState, int32_t buttonState,
+        int32_t edgeFlags, float xPrecision, float yPrecision,
+        nsecs_t downTime, int32_t displayId, uint32_t pointerCount,
+        const PointerProperties* pointerProperties, const PointerCoords* pointerCoords) :
+        EventEntry(TYPE_MOTION, eventTime, policyFlags),
+        eventTime(eventTime),
+        deviceId(deviceId), source(source), action(action), flags(flags),
+        metaState(metaState), buttonState(buttonState), edgeFlags(edgeFlags),
+        xPrecision(xPrecision), yPrecision(yPrecision),
+        downTime(downTime), displayId(displayId), pointerCount(pointerCount) {
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        this->pointerProperties[i].copyFrom(pointerProperties[i]);
+        this->pointerCoords[i].copyFrom(pointerCoords[i]);
+    }
+}
+
+InputDispatcher::MotionEntry::~MotionEntry() {
+}
+
+void InputDispatcher::MotionEntry::appendDescription(String8& msg) const {
+    msg.appendFormat("MotionEvent(deviceId=%d, source=0x%08x, action=%d, "
+            "flags=0x%08x, metaState=0x%08x, buttonState=0x%08x, edgeFlags=0x%08x, "
+            "xPrecision=%.1f, yPrecision=%.1f, displayId=%d, pointers=[",
+            deviceId, source, action, flags, metaState, buttonState, edgeFlags,
+            xPrecision, yPrecision, displayId);
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        if (i) {
+            msg.append(", ");
+        }
+        msg.appendFormat("%d: (%.1f, %.1f)", pointerProperties[i].id,
+                pointerCoords[i].getX(), pointerCoords[i].getY());
+    }
+    msg.appendFormat("]), policyFlags=0x%08x", policyFlags);
+}
+
+
+// --- InputDispatcher::DispatchEntry ---
+
+volatile int32_t InputDispatcher::DispatchEntry::sNextSeqAtomic;
+
+InputDispatcher::DispatchEntry::DispatchEntry(EventEntry* eventEntry,
+        int32_t targetFlags, float xOffset, float yOffset, float scaleFactor) :
+        seq(nextSeq()),
+        eventEntry(eventEntry), targetFlags(targetFlags),
+        xOffset(xOffset), yOffset(yOffset), scaleFactor(scaleFactor),
+        deliveryTime(0), resolvedAction(0), resolvedFlags(0) {
+    eventEntry->refCount += 1;
+}
+
+InputDispatcher::DispatchEntry::~DispatchEntry() {
+    eventEntry->release();
+}
+
+uint32_t InputDispatcher::DispatchEntry::nextSeq() {
+    // Sequence number 0 is reserved and will never be returned.
+    uint32_t seq;
+    do {
+        seq = android_atomic_inc(&sNextSeqAtomic);
+    } while (!seq);
+    return seq;
+}
+
+
+// --- InputDispatcher::InputState ---
+
+InputDispatcher::InputState::InputState() {
+}
+
+InputDispatcher::InputState::~InputState() {
+}
+
+bool InputDispatcher::InputState::isNeutral() const {
+    return mKeyMementos.isEmpty() && mMotionMementos.isEmpty();
+}
+
+bool InputDispatcher::InputState::isHovering(int32_t deviceId, uint32_t source,
+        int32_t displayId) const {
+    for (size_t i = 0; i < mMotionMementos.size(); i++) {
+        const MotionMemento& memento = mMotionMementos.itemAt(i);
+        if (memento.deviceId == deviceId
+                && memento.source == source
+                && memento.displayId == displayId
+                && memento.hovering) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool InputDispatcher::InputState::trackKey(const KeyEntry* entry,
+        int32_t action, int32_t flags) {
+    switch (action) {
+    case AKEY_EVENT_ACTION_UP: {
+        if (entry->flags & AKEY_EVENT_FLAG_FALLBACK) {
+            for (size_t i = 0; i < mFallbackKeys.size(); ) {
+                if (mFallbackKeys.valueAt(i) == entry->keyCode) {
+                    mFallbackKeys.removeItemsAt(i);
+                } else {
+                    i += 1;
+                }
+            }
+        }
+        ssize_t index = findKeyMemento(entry);
+        if (index >= 0) {
+            mKeyMementos.removeAt(index);
+            return true;
+        }
+        /* FIXME: We can't just drop the key up event because that prevents creating
+         * popup windows that are automatically shown when a key is held and then
+         * dismissed when the key is released.  The problem is that the popup will
+         * not have received the original key down, so the key up will be considered
+         * to be inconsistent with its observed state.  We could perhaps handle this
+         * by synthesizing a key down but that will cause other problems.
+         *
+         * So for now, allow inconsistent key up events to be dispatched.
+         *
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+        ALOGD("Dropping inconsistent key up event: deviceId=%d, source=%08x, "
+                "keyCode=%d, scanCode=%d",
+                entry->deviceId, entry->source, entry->keyCode, entry->scanCode);
+#endif
+        return false;
+        */
+        return true;
+    }
+
+    case AKEY_EVENT_ACTION_DOWN: {
+        ssize_t index = findKeyMemento(entry);
+        if (index >= 0) {
+            mKeyMementos.removeAt(index);
+        }
+        addKeyMemento(entry, flags);
+        return true;
+    }
+
+    default:
+        return true;
+    }
+}
+
+bool InputDispatcher::InputState::trackMotion(const MotionEntry* entry,
+        int32_t action, int32_t flags) {
+    int32_t actionMasked = action & AMOTION_EVENT_ACTION_MASK;
+    switch (actionMasked) {
+    case AMOTION_EVENT_ACTION_UP:
+    case AMOTION_EVENT_ACTION_CANCEL: {
+        ssize_t index = findMotionMemento(entry, false /*hovering*/);
+        if (index >= 0) {
+            mMotionMementos.removeAt(index);
+            return true;
+        }
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+        ALOGD("Dropping inconsistent motion up or cancel event: deviceId=%d, source=%08x, "
+                "actionMasked=%d",
+                entry->deviceId, entry->source, actionMasked);
+#endif
+        return false;
+    }
+
+    case AMOTION_EVENT_ACTION_DOWN: {
+        ssize_t index = findMotionMemento(entry, false /*hovering*/);
+        if (index >= 0) {
+            mMotionMementos.removeAt(index);
+        }
+        addMotionMemento(entry, flags, false /*hovering*/);
+        return true;
+    }
+
+    case AMOTION_EVENT_ACTION_POINTER_UP:
+    case AMOTION_EVENT_ACTION_POINTER_DOWN:
+    case AMOTION_EVENT_ACTION_MOVE: {
+        ssize_t index = findMotionMemento(entry, false /*hovering*/);
+        if (index >= 0) {
+            MotionMemento& memento = mMotionMementos.editItemAt(index);
+            memento.setPointers(entry);
+            return true;
+        }
+        if (actionMasked == AMOTION_EVENT_ACTION_MOVE
+                && (entry->source & (AINPUT_SOURCE_CLASS_JOYSTICK
+                        | AINPUT_SOURCE_CLASS_NAVIGATION))) {
+            // Joysticks and trackballs can send MOVE events without corresponding DOWN or UP.
+            return true;
+        }
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+        ALOGD("Dropping inconsistent motion pointer up/down or move event: "
+                "deviceId=%d, source=%08x, actionMasked=%d",
+                entry->deviceId, entry->source, actionMasked);
+#endif
+        return false;
+    }
+
+    case AMOTION_EVENT_ACTION_HOVER_EXIT: {
+        ssize_t index = findMotionMemento(entry, true /*hovering*/);
+        if (index >= 0) {
+            mMotionMementos.removeAt(index);
+            return true;
+        }
+#if DEBUG_OUTBOUND_EVENT_DETAILS
+        ALOGD("Dropping inconsistent motion hover exit event: deviceId=%d, source=%08x",
+                entry->deviceId, entry->source);
+#endif
+        return false;
+    }
+
+    case AMOTION_EVENT_ACTION_HOVER_ENTER:
+    case AMOTION_EVENT_ACTION_HOVER_MOVE: {
+        ssize_t index = findMotionMemento(entry, true /*hovering*/);
+        if (index >= 0) {
+            mMotionMementos.removeAt(index);
+        }
+        addMotionMemento(entry, flags, true /*hovering*/);
+        return true;
+    }
+
+    default:
+        return true;
+    }
+}
+
+ssize_t InputDispatcher::InputState::findKeyMemento(const KeyEntry* entry) const {
+    for (size_t i = 0; i < mKeyMementos.size(); i++) {
+        const KeyMemento& memento = mKeyMementos.itemAt(i);
+        if (memento.deviceId == entry->deviceId
+                && memento.source == entry->source
+                && memento.keyCode == entry->keyCode
+                && memento.scanCode == entry->scanCode) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+ssize_t InputDispatcher::InputState::findMotionMemento(const MotionEntry* entry,
+        bool hovering) const {
+    for (size_t i = 0; i < mMotionMementos.size(); i++) {
+        const MotionMemento& memento = mMotionMementos.itemAt(i);
+        if (memento.deviceId == entry->deviceId
+                && memento.source == entry->source
+                && memento.displayId == entry->displayId
+                && memento.hovering == hovering) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+void InputDispatcher::InputState::addKeyMemento(const KeyEntry* entry, int32_t flags) {
+    mKeyMementos.push();
+    KeyMemento& memento = mKeyMementos.editTop();
+    memento.deviceId = entry->deviceId;
+    memento.source = entry->source;
+    memento.keyCode = entry->keyCode;
+    memento.scanCode = entry->scanCode;
+    memento.metaState = entry->metaState;
+    memento.flags = flags;
+    memento.downTime = entry->downTime;
+    memento.policyFlags = entry->policyFlags;
+}
+
+void InputDispatcher::InputState::addMotionMemento(const MotionEntry* entry,
+        int32_t flags, bool hovering) {
+    mMotionMementos.push();
+    MotionMemento& memento = mMotionMementos.editTop();
+    memento.deviceId = entry->deviceId;
+    memento.source = entry->source;
+    memento.flags = flags;
+    memento.xPrecision = entry->xPrecision;
+    memento.yPrecision = entry->yPrecision;
+    memento.downTime = entry->downTime;
+    memento.displayId = entry->displayId;
+    memento.setPointers(entry);
+    memento.hovering = hovering;
+    memento.policyFlags = entry->policyFlags;
+}
+
+void InputDispatcher::InputState::MotionMemento::setPointers(const MotionEntry* entry) {
+    pointerCount = entry->pointerCount;
+    for (uint32_t i = 0; i < entry->pointerCount; i++) {
+        pointerProperties[i].copyFrom(entry->pointerProperties[i]);
+        pointerCoords[i].copyFrom(entry->pointerCoords[i]);
+    }
+}
+
+void InputDispatcher::InputState::synthesizeCancelationEvents(nsecs_t currentTime,
+        Vector<EventEntry*>& outEvents, const CancelationOptions& options) {
+    for (size_t i = 0; i < mKeyMementos.size(); i++) {
+        const KeyMemento& memento = mKeyMementos.itemAt(i);
+        if (shouldCancelKey(memento, options)) {
+            outEvents.push(new KeyEntry(currentTime,
+                    memento.deviceId, memento.source, memento.policyFlags,
+                    AKEY_EVENT_ACTION_UP, memento.flags | AKEY_EVENT_FLAG_CANCELED,
+                    memento.keyCode, memento.scanCode, memento.metaState, 0, memento.downTime));
+        }
+    }
+
+    for (size_t i = 0; i < mMotionMementos.size(); i++) {
+        const MotionMemento& memento = mMotionMementos.itemAt(i);
+        if (shouldCancelMotion(memento, options)) {
+            outEvents.push(new MotionEntry(currentTime,
+                    memento.deviceId, memento.source, memento.policyFlags,
+                    memento.hovering
+                            ? AMOTION_EVENT_ACTION_HOVER_EXIT
+                            : AMOTION_EVENT_ACTION_CANCEL,
+                    memento.flags, 0, 0, 0,
+                    memento.xPrecision, memento.yPrecision, memento.downTime,
+                    memento.displayId,
+                    memento.pointerCount, memento.pointerProperties, memento.pointerCoords));
+        }
+    }
+}
+
+void InputDispatcher::InputState::clear() {
+    mKeyMementos.clear();
+    mMotionMementos.clear();
+    mFallbackKeys.clear();
+}
+
+void InputDispatcher::InputState::copyPointerStateTo(InputState& other) const {
+    for (size_t i = 0; i < mMotionMementos.size(); i++) {
+        const MotionMemento& memento = mMotionMementos.itemAt(i);
+        if (memento.source & AINPUT_SOURCE_CLASS_POINTER) {
+            for (size_t j = 0; j < other.mMotionMementos.size(); ) {
+                const MotionMemento& otherMemento = other.mMotionMementos.itemAt(j);
+                if (memento.deviceId == otherMemento.deviceId
+                        && memento.source == otherMemento.source
+                        && memento.displayId == otherMemento.displayId) {
+                    other.mMotionMementos.removeAt(j);
+                } else {
+                    j += 1;
+                }
+            }
+            other.mMotionMementos.push(memento);
+        }
+    }
+}
+
+int32_t InputDispatcher::InputState::getFallbackKey(int32_t originalKeyCode) {
+    ssize_t index = mFallbackKeys.indexOfKey(originalKeyCode);
+    return index >= 0 ? mFallbackKeys.valueAt(index) : -1;
+}
+
+void InputDispatcher::InputState::setFallbackKey(int32_t originalKeyCode,
+        int32_t fallbackKeyCode) {
+    ssize_t index = mFallbackKeys.indexOfKey(originalKeyCode);
+    if (index >= 0) {
+        mFallbackKeys.replaceValueAt(index, fallbackKeyCode);
+    } else {
+        mFallbackKeys.add(originalKeyCode, fallbackKeyCode);
+    }
+}
+
+void InputDispatcher::InputState::removeFallbackKey(int32_t originalKeyCode) {
+    mFallbackKeys.removeItem(originalKeyCode);
+}
+
+bool InputDispatcher::InputState::shouldCancelKey(const KeyMemento& memento,
+        const CancelationOptions& options) {
+    if (options.keyCode != -1 && memento.keyCode != options.keyCode) {
+        return false;
+    }
+
+    if (options.deviceId != -1 && memento.deviceId != options.deviceId) {
+        return false;
+    }
+
+    switch (options.mode) {
+    case CancelationOptions::CANCEL_ALL_EVENTS:
+    case CancelationOptions::CANCEL_NON_POINTER_EVENTS:
+        return true;
+    case CancelationOptions::CANCEL_FALLBACK_EVENTS:
+        return memento.flags & AKEY_EVENT_FLAG_FALLBACK;
+    default:
+        return false;
+    }
+}
+
+bool InputDispatcher::InputState::shouldCancelMotion(const MotionMemento& memento,
+        const CancelationOptions& options) {
+    if (options.deviceId != -1 && memento.deviceId != options.deviceId) {
+        return false;
+    }
+
+    switch (options.mode) {
+    case CancelationOptions::CANCEL_ALL_EVENTS:
+        return true;
+    case CancelationOptions::CANCEL_POINTER_EVENTS:
+        return memento.source & AINPUT_SOURCE_CLASS_POINTER;
+    case CancelationOptions::CANCEL_NON_POINTER_EVENTS:
+        return !(memento.source & AINPUT_SOURCE_CLASS_POINTER);
+    default:
+        return false;
+    }
+}
+
+
+// --- InputDispatcher::Connection ---
+
+InputDispatcher::Connection::Connection(const sp<InputChannel>& inputChannel,
+        const sp<InputWindowHandle>& inputWindowHandle, bool monitor) :
+        status(STATUS_NORMAL), inputChannel(inputChannel), inputWindowHandle(inputWindowHandle),
+        monitor(monitor),
+        inputPublisher(inputChannel), inputPublisherBlocked(false) {
+}
+
+InputDispatcher::Connection::~Connection() {
+}
+
+const char* InputDispatcher::Connection::getWindowName() const {
+    if (inputWindowHandle != NULL) {
+        return inputWindowHandle->getName().string();
+    }
+    if (monitor) {
+        return "monitor";
+    }
+    return "?";
+}
+
+const char* InputDispatcher::Connection::getStatusLabel() const {
+    switch (status) {
+    case STATUS_NORMAL:
+        return "NORMAL";
+
+    case STATUS_BROKEN:
+        return "BROKEN";
+
+    case STATUS_ZOMBIE:
+        return "ZOMBIE";
+
+    default:
+        return "UNKNOWN";
+    }
+}
+
+InputDispatcher::DispatchEntry* InputDispatcher::Connection::findWaitQueueEntry(uint32_t seq) {
+    for (DispatchEntry* entry = waitQueue.head; entry != NULL; entry = entry->next) {
+        if (entry->seq == seq) {
+            return entry;
+        }
+    }
+    return NULL;
+}
+
+
+// --- InputDispatcher::CommandEntry ---
+
+InputDispatcher::CommandEntry::CommandEntry(Command command) :
+    command(command), eventTime(0), keyEntry(NULL), userActivityEventType(0),
+    seq(0), handled(false) {
+}
+
+InputDispatcher::CommandEntry::~CommandEntry() {
+}
+
+
+// --- InputDispatcher::TouchState ---
+
+InputDispatcher::TouchState::TouchState() :
+    down(false), split(false), deviceId(-1), source(0), displayId(-1) {
+}
+
+InputDispatcher::TouchState::~TouchState() {
+}
+
+void InputDispatcher::TouchState::reset() {
+    down = false;
+    split = false;
+    deviceId = -1;
+    source = 0;
+    displayId = -1;
+    windows.clear();
+}
+
+void InputDispatcher::TouchState::copyFrom(const TouchState& other) {
+    down = other.down;
+    split = other.split;
+    deviceId = other.deviceId;
+    source = other.source;
+    displayId = other.displayId;
+    windows = other.windows;
+}
+
+void InputDispatcher::TouchState::addOrUpdateWindow(const sp<InputWindowHandle>& windowHandle,
+        int32_t targetFlags, BitSet32 pointerIds) {
+    if (targetFlags & InputTarget::FLAG_SPLIT) {
+        split = true;
+    }
+
+    for (size_t i = 0; i < windows.size(); i++) {
+        TouchedWindow& touchedWindow = windows.editItemAt(i);
+        if (touchedWindow.windowHandle == windowHandle) {
+            touchedWindow.targetFlags |= targetFlags;
+            if (targetFlags & InputTarget::FLAG_DISPATCH_AS_SLIPPERY_EXIT) {
+                touchedWindow.targetFlags &= ~InputTarget::FLAG_DISPATCH_AS_IS;
+            }
+            touchedWindow.pointerIds.value |= pointerIds.value;
+            return;
+        }
+    }
+
+    windows.push();
+
+    TouchedWindow& touchedWindow = windows.editTop();
+    touchedWindow.windowHandle = windowHandle;
+    touchedWindow.targetFlags = targetFlags;
+    touchedWindow.pointerIds = pointerIds;
+}
+
+void InputDispatcher::TouchState::removeWindow(const sp<InputWindowHandle>& windowHandle) {
+    for (size_t i = 0; i < windows.size(); i++) {
+        if (windows.itemAt(i).windowHandle == windowHandle) {
+            windows.removeAt(i);
+            return;
+        }
+    }
+}
+
+void InputDispatcher::TouchState::filterNonAsIsTouchWindows() {
+    for (size_t i = 0 ; i < windows.size(); ) {
+        TouchedWindow& window = windows.editItemAt(i);
+        if (window.targetFlags & (InputTarget::FLAG_DISPATCH_AS_IS
+                | InputTarget::FLAG_DISPATCH_AS_SLIPPERY_ENTER)) {
+            window.targetFlags &= ~InputTarget::FLAG_DISPATCH_MASK;
+            window.targetFlags |= InputTarget::FLAG_DISPATCH_AS_IS;
+            i += 1;
+        } else {
+            windows.removeAt(i);
+        }
+    }
+}
+
+sp<InputWindowHandle> InputDispatcher::TouchState::getFirstForegroundWindowHandle() const {
+    for (size_t i = 0; i < windows.size(); i++) {
+        const TouchedWindow& window = windows.itemAt(i);
+        if (window.targetFlags & InputTarget::FLAG_FOREGROUND) {
+            return window.windowHandle;
+        }
+    }
+    return NULL;
+}
+
+bool InputDispatcher::TouchState::isSlippery() const {
+    // Must have exactly one foreground window.
+    bool haveSlipperyForegroundWindow = false;
+    for (size_t i = 0; i < windows.size(); i++) {
+        const TouchedWindow& window = windows.itemAt(i);
+        if (window.targetFlags & InputTarget::FLAG_FOREGROUND) {
+            if (haveSlipperyForegroundWindow
+                    || !(window.windowHandle->getInfo()->layoutParamsFlags
+                            & InputWindowInfo::FLAG_SLIPPERY)) {
+                return false;
+            }
+            haveSlipperyForegroundWindow = true;
+        }
+    }
+    return haveSlipperyForegroundWindow;
+}
+
+
+// --- InputDispatcherThread ---
+
+InputDispatcherThread::InputDispatcherThread(const sp<InputDispatcherInterface>& dispatcher) :
+        Thread(/*canCallJava*/ true), mDispatcher(dispatcher) {
+}
+
+InputDispatcherThread::~InputDispatcherThread() {
+}
+
+bool InputDispatcherThread::threadLoop() {
+    mDispatcher->dispatchOnce();
+    return true;
+}
+
+} // namespace android
diff --git a/libs/input/InputDispatcher.h b/libs/input/InputDispatcher.h
new file mode 100644
index 0000000..190e7b2
--- /dev/null
+++ b/libs/input/InputDispatcher.h
@@ -0,0 +1,1123 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _UI_INPUT_DISPATCHER_H
+#define _UI_INPUT_DISPATCHER_H
+
+#include <input/Input.h>
+#include <input/InputTransport.h>
+#include <utils/KeyedVector.h>
+#include <utils/Vector.h>
+#include <utils/threads.h>
+#include <utils/Timers.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+#include <utils/Looper.h>
+#include <utils/BitSet.h>
+#include <cutils/atomic.h>
+
+#include <stddef.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include "InputWindow.h"
+#include "InputApplication.h"
+#include "InputListener.h"
+
+
+namespace android {
+
+/*
+ * Constants used to report the outcome of input event injection.
+ */
+enum {
+    /* (INTERNAL USE ONLY) Specifies that injection is pending and its outcome is unknown. */
+    INPUT_EVENT_INJECTION_PENDING = -1,
+
+    /* Injection succeeded. */
+    INPUT_EVENT_INJECTION_SUCCEEDED = 0,
+
+    /* Injection failed because the injector did not have permission to inject
+     * into the application with input focus. */
+    INPUT_EVENT_INJECTION_PERMISSION_DENIED = 1,
+
+    /* Injection failed because there were no available input targets. */
+    INPUT_EVENT_INJECTION_FAILED = 2,
+
+    /* Injection failed due to a timeout. */
+    INPUT_EVENT_INJECTION_TIMED_OUT = 3
+};
+
+/*
+ * Constants used to determine the input event injection synchronization mode.
+ */
+enum {
+    /* Injection is asynchronous and is assumed always to be successful. */
+    INPUT_EVENT_INJECTION_SYNC_NONE = 0,
+
+    /* Waits for previous events to be dispatched so that the input dispatcher can determine
+     * whether input event injection willbe permitted based on the current input focus.
+     * Does not wait for the input event to finish processing. */
+    INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_RESULT = 1,
+
+    /* Waits for the input event to be completely processed. */
+    INPUT_EVENT_INJECTION_SYNC_WAIT_FOR_FINISHED = 2,
+};
+
+
+/*
+ * An input target specifies how an input event is to be dispatched to a particular window
+ * including the window's input channel, control flags, a timeout, and an X / Y offset to
+ * be added to input event coordinates to compensate for the absolute position of the
+ * window area.
+ */
+struct InputTarget {
+    enum {
+        /* This flag indicates that the event is being delivered to a foreground application. */
+        FLAG_FOREGROUND = 1 << 0,
+
+        /* This flag indicates that the target of a MotionEvent is partly or wholly
+         * obscured by another visible window above it.  The motion event should be
+         * delivered with flag AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED. */
+        FLAG_WINDOW_IS_OBSCURED = 1 << 1,
+
+        /* This flag indicates that a motion event is being split across multiple windows. */
+        FLAG_SPLIT = 1 << 2,
+
+        /* This flag indicates that the pointer coordinates dispatched to the application
+         * will be zeroed out to avoid revealing information to an application. This is
+         * used in conjunction with FLAG_DISPATCH_AS_OUTSIDE to prevent apps not sharing
+         * the same UID from watching all touches. */
+        FLAG_ZERO_COORDS = 1 << 3,
+
+        /* This flag indicates that the event should be sent as is.
+         * Should always be set unless the event is to be transmuted. */
+        FLAG_DISPATCH_AS_IS = 1 << 8,
+
+        /* This flag indicates that a MotionEvent with AMOTION_EVENT_ACTION_DOWN falls outside
+         * of the area of this target and so should instead be delivered as an
+         * AMOTION_EVENT_ACTION_OUTSIDE to this target. */
+        FLAG_DISPATCH_AS_OUTSIDE = 1 << 9,
+
+        /* This flag indicates that a hover sequence is starting in the given window.
+         * The event is transmuted into ACTION_HOVER_ENTER. */
+        FLAG_DISPATCH_AS_HOVER_ENTER = 1 << 10,
+
+        /* This flag indicates that a hover event happened outside of a window which handled
+         * previous hover events, signifying the end of the current hover sequence for that
+         * window.
+         * The event is transmuted into ACTION_HOVER_ENTER. */
+        FLAG_DISPATCH_AS_HOVER_EXIT = 1 << 11,
+
+        /* This flag indicates that the event should be canceled.
+         * It is used to transmute ACTION_MOVE into ACTION_CANCEL when a touch slips
+         * outside of a window. */
+        FLAG_DISPATCH_AS_SLIPPERY_EXIT = 1 << 12,
+
+        /* This flag indicates that the event should be dispatched as an initial down.
+         * It is used to transmute ACTION_MOVE into ACTION_DOWN when a touch slips
+         * into a new window. */
+        FLAG_DISPATCH_AS_SLIPPERY_ENTER = 1 << 13,
+
+        /* Mask for all dispatch modes. */
+        FLAG_DISPATCH_MASK = FLAG_DISPATCH_AS_IS
+                | FLAG_DISPATCH_AS_OUTSIDE
+                | FLAG_DISPATCH_AS_HOVER_ENTER
+                | FLAG_DISPATCH_AS_HOVER_EXIT
+                | FLAG_DISPATCH_AS_SLIPPERY_EXIT
+                | FLAG_DISPATCH_AS_SLIPPERY_ENTER,
+    };
+
+    // The input channel to be targeted.
+    sp<InputChannel> inputChannel;
+
+    // Flags for the input target.
+    int32_t flags;
+
+    // The x and y offset to add to a MotionEvent as it is delivered.
+    // (ignored for KeyEvents)
+    float xOffset, yOffset;
+
+    // Scaling factor to apply to MotionEvent as it is delivered.
+    // (ignored for KeyEvents)
+    float scaleFactor;
+
+    // The subset of pointer ids to include in motion events dispatched to this input target
+    // if FLAG_SPLIT is set.
+    BitSet32 pointerIds;
+};
+
+
+/*
+ * Input dispatcher configuration.
+ *
+ * Specifies various options that modify the behavior of the input dispatcher.
+ * The values provided here are merely defaults. The actual values will come from ViewConfiguration
+ * and are passed into the dispatcher during initialization.
+ */
+struct InputDispatcherConfiguration {
+    // The key repeat initial timeout.
+    nsecs_t keyRepeatTimeout;
+
+    // The key repeat inter-key delay.
+    nsecs_t keyRepeatDelay;
+
+    InputDispatcherConfiguration() :
+            keyRepeatTimeout(500 * 1000000LL),
+            keyRepeatDelay(50 * 1000000LL) { }
+};
+
+
+/*
+ * Input dispatcher policy interface.
+ *
+ * The input reader policy is used by the input reader to interact with the Window Manager
+ * and other system components.
+ *
+ * The actual implementation is partially supported by callbacks into the DVM
+ * via JNI.  This interface is also mocked in the unit tests.
+ */
+class InputDispatcherPolicyInterface : public virtual RefBase {
+protected:
+    InputDispatcherPolicyInterface() { }
+    virtual ~InputDispatcherPolicyInterface() { }
+
+public:
+    /* Notifies the system that a configuration change has occurred. */
+    virtual void notifyConfigurationChanged(nsecs_t when) = 0;
+
+    /* Notifies the system that an application is not responding.
+     * Returns a new timeout to continue waiting, or 0 to abort dispatch. */
+    virtual nsecs_t notifyANR(const sp<InputApplicationHandle>& inputApplicationHandle,
+            const sp<InputWindowHandle>& inputWindowHandle,
+            const String8& reason) = 0;
+
+    /* Notifies the system that an input channel is unrecoverably broken. */
+    virtual void notifyInputChannelBroken(const sp<InputWindowHandle>& inputWindowHandle) = 0;
+
+    /* Gets the input dispatcher configuration. */
+    virtual void getDispatcherConfiguration(InputDispatcherConfiguration* outConfig) = 0;
+
+    /* Returns true if automatic key repeating is enabled. */
+    virtual bool isKeyRepeatEnabled() = 0;
+
+    /* Filters an input event.
+     * Return true to dispatch the event unmodified, false to consume the event.
+     * A filter can also transform and inject events later by passing POLICY_FLAG_FILTERED
+     * to injectInputEvent.
+     */
+    virtual bool filterInputEvent(const InputEvent* inputEvent, uint32_t policyFlags) = 0;
+
+    /* Intercepts a key event immediately before queueing it.
+     * The policy can use this method as an opportunity to perform power management functions
+     * and early event preprocessing such as updating policy flags.
+     *
+     * This method is expected to set the POLICY_FLAG_PASS_TO_USER policy flag if the event
+     * should be dispatched to applications.
+     */
+    virtual void interceptKeyBeforeQueueing(const KeyEvent* keyEvent, uint32_t& policyFlags) = 0;
+
+    /* Intercepts a touch, trackball or other motion event before queueing it.
+     * The policy can use this method as an opportunity to perform power management functions
+     * and early event preprocessing such as updating policy flags.
+     *
+     * This method is expected to set the POLICY_FLAG_PASS_TO_USER policy flag if the event
+     * should be dispatched to applications.
+     */
+    virtual void interceptMotionBeforeQueueing(nsecs_t when, uint32_t& policyFlags) = 0;
+
+    /* Allows the policy a chance to intercept a key before dispatching. */
+    virtual nsecs_t interceptKeyBeforeDispatching(const sp<InputWindowHandle>& inputWindowHandle,
+            const KeyEvent* keyEvent, uint32_t policyFlags) = 0;
+
+    /* Allows the policy a chance to perform default processing for an unhandled key.
+     * Returns an alternate keycode to redispatch as a fallback, or 0 to give up. */
+    virtual bool dispatchUnhandledKey(const sp<InputWindowHandle>& inputWindowHandle,
+            const KeyEvent* keyEvent, uint32_t policyFlags, KeyEvent* outFallbackKeyEvent) = 0;
+
+    /* Notifies the policy about switch events.
+     */
+    virtual void notifySwitch(nsecs_t when,
+            uint32_t switchValues, uint32_t switchMask, uint32_t policyFlags) = 0;
+
+    /* Poke user activity for an event dispatched to a window. */
+    virtual void pokeUserActivity(nsecs_t eventTime, int32_t eventType) = 0;
+
+    /* Checks whether a given application pid/uid has permission to inject input events
+     * into other applications.
+     *
+     * This method is special in that its implementation promises to be non-reentrant and
+     * is safe to call while holding other locks.  (Most other methods make no such guarantees!)
+     */
+    virtual bool checkInjectEventsPermissionNonReentrant(
+            int32_t injectorPid, int32_t injectorUid) = 0;
+};
+
+
+/* Notifies the system about input events generated by the input reader.
+ * The dispatcher is expected to be mostly asynchronous. */
+class InputDispatcherInterface : public virtual RefBase, public InputListenerInterface {
+protected:
+    InputDispatcherInterface() { }
+    virtual ~InputDispatcherInterface() { }
+
+public:
+    /* Dumps the state of the input dispatcher.
+     *
+     * This method may be called on any thread (usually by the input manager). */
+    virtual void dump(String8& dump) = 0;
+
+    /* Called by the heatbeat to ensures that the dispatcher has not deadlocked. */
+    virtual void monitor() = 0;
+
+    /* Runs a single iteration of the dispatch loop.
+     * Nominally processes one queued event, a timeout, or a response from an input consumer.
+     *
+     * This method should only be called on the input dispatcher thread.
+     */
+    virtual void dispatchOnce() = 0;
+
+    /* Injects an input event and optionally waits for sync.
+     * The synchronization mode determines whether the method blocks while waiting for
+     * input injection to proceed.
+     * Returns one of the INPUT_EVENT_INJECTION_XXX constants.
+     *
+     * This method may be called on any thread (usually by the input manager).
+     */
+    virtual int32_t injectInputEvent(const InputEvent* event,
+            int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis,
+            uint32_t policyFlags) = 0;
+
+    /* Sets the list of input windows.
+     *
+     * This method may be called on any thread (usually by the input manager).
+     */
+    virtual void setInputWindows(const Vector<sp<InputWindowHandle> >& inputWindowHandles) = 0;
+
+    /* Sets the focused application.
+     *
+     * This method may be called on any thread (usually by the input manager).
+     */
+    virtual void setFocusedApplication(
+            const sp<InputApplicationHandle>& inputApplicationHandle) = 0;
+
+    /* Sets the input dispatching mode.
+     *
+     * This method may be called on any thread (usually by the input manager).
+     */
+    virtual void setInputDispatchMode(bool enabled, bool frozen) = 0;
+
+    /* Sets whether input event filtering is enabled.
+     * When enabled, incoming input events are sent to the policy's filterInputEvent
+     * method instead of being dispatched.  The filter is expected to use
+     * injectInputEvent to inject the events it would like to have dispatched.
+     * It should include POLICY_FLAG_FILTERED in the policy flags during injection.
+     */
+    virtual void setInputFilterEnabled(bool enabled) = 0;
+
+    /* Transfers touch focus from the window associated with one channel to the
+     * window associated with the other channel.
+     *
+     * Returns true on success.  False if the window did not actually have touch focus.
+     */
+    virtual bool transferTouchFocus(const sp<InputChannel>& fromChannel,
+            const sp<InputChannel>& toChannel) = 0;
+
+    /* Registers or unregister input channels that may be used as targets for input events.
+     * If monitor is true, the channel will receive a copy of all input events.
+     *
+     * These methods may be called on any thread (usually by the input manager).
+     */
+    virtual status_t registerInputChannel(const sp<InputChannel>& inputChannel,
+            const sp<InputWindowHandle>& inputWindowHandle, bool monitor) = 0;
+    virtual status_t unregisterInputChannel(const sp<InputChannel>& inputChannel) = 0;
+};
+
+/* Dispatches events to input targets.  Some functions of the input dispatcher, such as
+ * identifying input targets, are controlled by a separate policy object.
+ *
+ * IMPORTANT INVARIANT:
+ *     Because the policy can potentially block or cause re-entrance into the input dispatcher,
+ *     the input dispatcher never calls into the policy while holding its internal locks.
+ *     The implementation is also carefully designed to recover from scenarios such as an
+ *     input channel becoming unregistered while identifying input targets or processing timeouts.
+ *
+ *     Methods marked 'Locked' must be called with the lock acquired.
+ *
+ *     Methods marked 'LockedInterruptible' must be called with the lock acquired but
+ *     may during the course of their execution release the lock, call into the policy, and
+ *     then reacquire the lock.  The caller is responsible for recovering gracefully.
+ *
+ *     A 'LockedInterruptible' method may called a 'Locked' method, but NOT vice-versa.
+ */
+class InputDispatcher : public InputDispatcherInterface {
+protected:
+    virtual ~InputDispatcher();
+
+public:
+    explicit InputDispatcher(const sp<InputDispatcherPolicyInterface>& policy);
+
+    virtual void dump(String8& dump);
+    virtual void monitor();
+
+    virtual void dispatchOnce();
+
+    virtual void notifyConfigurationChanged(const NotifyConfigurationChangedArgs* args);
+    virtual void notifyKey(const NotifyKeyArgs* args);
+    virtual void notifyMotion(const NotifyMotionArgs* args);
+    virtual void notifySwitch(const NotifySwitchArgs* args);
+    virtual void notifyDeviceReset(const NotifyDeviceResetArgs* args);
+
+    virtual int32_t injectInputEvent(const InputEvent* event,
+            int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis,
+            uint32_t policyFlags);
+
+    virtual void setInputWindows(const Vector<sp<InputWindowHandle> >& inputWindowHandles);
+    virtual void setFocusedApplication(const sp<InputApplicationHandle>& inputApplicationHandle);
+    virtual void setInputDispatchMode(bool enabled, bool frozen);
+    virtual void setInputFilterEnabled(bool enabled);
+
+    virtual bool transferTouchFocus(const sp<InputChannel>& fromChannel,
+            const sp<InputChannel>& toChannel);
+
+    virtual status_t registerInputChannel(const sp<InputChannel>& inputChannel,
+            const sp<InputWindowHandle>& inputWindowHandle, bool monitor);
+    virtual status_t unregisterInputChannel(const sp<InputChannel>& inputChannel);
+
+private:
+    template <typename T>
+    struct Link {
+        T* next;
+        T* prev;
+
+    protected:
+        inline Link() : next(NULL), prev(NULL) { }
+    };
+
+    struct InjectionState {
+        mutable int32_t refCount;
+
+        int32_t injectorPid;
+        int32_t injectorUid;
+        int32_t injectionResult;  // initially INPUT_EVENT_INJECTION_PENDING
+        bool injectionIsAsync; // set to true if injection is not waiting for the result
+        int32_t pendingForegroundDispatches; // the number of foreground dispatches in progress
+
+        InjectionState(int32_t injectorPid, int32_t injectorUid);
+        void release();
+
+    private:
+        ~InjectionState();
+    };
+
+    struct EventEntry : Link<EventEntry> {
+        enum {
+            TYPE_CONFIGURATION_CHANGED,
+            TYPE_DEVICE_RESET,
+            TYPE_KEY,
+            TYPE_MOTION
+        };
+
+        mutable int32_t refCount;
+        int32_t type;
+        nsecs_t eventTime;
+        uint32_t policyFlags;
+        InjectionState* injectionState;
+
+        bool dispatchInProgress; // initially false, set to true while dispatching
+
+        inline bool isInjected() const { return injectionState != NULL; }
+
+        void release();
+
+        virtual void appendDescription(String8& msg) const = 0;
+
+    protected:
+        EventEntry(int32_t type, nsecs_t eventTime, uint32_t policyFlags);
+        virtual ~EventEntry();
+        void releaseInjectionState();
+    };
+
+    struct ConfigurationChangedEntry : EventEntry {
+        ConfigurationChangedEntry(nsecs_t eventTime);
+        virtual void appendDescription(String8& msg) const;
+
+    protected:
+        virtual ~ConfigurationChangedEntry();
+    };
+
+    struct DeviceResetEntry : EventEntry {
+        int32_t deviceId;
+
+        DeviceResetEntry(nsecs_t eventTime, int32_t deviceId);
+        virtual void appendDescription(String8& msg) const;
+
+    protected:
+        virtual ~DeviceResetEntry();
+    };
+
+    struct KeyEntry : EventEntry {
+        int32_t deviceId;
+        uint32_t source;
+        int32_t action;
+        int32_t flags;
+        int32_t keyCode;
+        int32_t scanCode;
+        int32_t metaState;
+        int32_t repeatCount;
+        nsecs_t downTime;
+
+        bool syntheticRepeat; // set to true for synthetic key repeats
+
+        enum InterceptKeyResult {
+            INTERCEPT_KEY_RESULT_UNKNOWN,
+            INTERCEPT_KEY_RESULT_SKIP,
+            INTERCEPT_KEY_RESULT_CONTINUE,
+            INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER,
+        };
+        InterceptKeyResult interceptKeyResult; // set based on the interception result
+        nsecs_t interceptKeyWakeupTime; // used with INTERCEPT_KEY_RESULT_TRY_AGAIN_LATER
+
+        KeyEntry(nsecs_t eventTime,
+                int32_t deviceId, uint32_t source, uint32_t policyFlags, int32_t action,
+                int32_t flags, int32_t keyCode, int32_t scanCode, int32_t metaState,
+                int32_t repeatCount, nsecs_t downTime);
+        virtual void appendDescription(String8& msg) const;
+        void recycle();
+
+    protected:
+        virtual ~KeyEntry();
+    };
+
+    struct MotionEntry : EventEntry {
+        nsecs_t eventTime;
+        int32_t deviceId;
+        uint32_t source;
+        int32_t action;
+        int32_t flags;
+        int32_t metaState;
+        int32_t buttonState;
+        int32_t edgeFlags;
+        float xPrecision;
+        float yPrecision;
+        nsecs_t downTime;
+        int32_t displayId;
+        uint32_t pointerCount;
+        PointerProperties pointerProperties[MAX_POINTERS];
+        PointerCoords pointerCoords[MAX_POINTERS];
+
+        MotionEntry(nsecs_t eventTime,
+                int32_t deviceId, uint32_t source, uint32_t policyFlags,
+                int32_t action, int32_t flags,
+                int32_t metaState, int32_t buttonState, int32_t edgeFlags,
+                float xPrecision, float yPrecision,
+                nsecs_t downTime, int32_t displayId, uint32_t pointerCount,
+                const PointerProperties* pointerProperties, const PointerCoords* pointerCoords);
+        virtual void appendDescription(String8& msg) const;
+
+    protected:
+        virtual ~MotionEntry();
+    };
+
+    // Tracks the progress of dispatching a particular event to a particular connection.
+    struct DispatchEntry : Link<DispatchEntry> {
+        const uint32_t seq; // unique sequence number, never 0
+
+        EventEntry* eventEntry; // the event to dispatch
+        int32_t targetFlags;
+        float xOffset;
+        float yOffset;
+        float scaleFactor;
+        nsecs_t deliveryTime; // time when the event was actually delivered
+
+        // Set to the resolved action and flags when the event is enqueued.
+        int32_t resolvedAction;
+        int32_t resolvedFlags;
+
+        DispatchEntry(EventEntry* eventEntry,
+                int32_t targetFlags, float xOffset, float yOffset, float scaleFactor);
+        ~DispatchEntry();
+
+        inline bool hasForegroundTarget() const {
+            return targetFlags & InputTarget::FLAG_FOREGROUND;
+        }
+
+        inline bool isSplit() const {
+            return targetFlags & InputTarget::FLAG_SPLIT;
+        }
+
+    private:
+        static volatile int32_t sNextSeqAtomic;
+
+        static uint32_t nextSeq();
+    };
+
+    // A command entry captures state and behavior for an action to be performed in the
+    // dispatch loop after the initial processing has taken place.  It is essentially
+    // a kind of continuation used to postpone sensitive policy interactions to a point
+    // in the dispatch loop where it is safe to release the lock (generally after finishing
+    // the critical parts of the dispatch cycle).
+    //
+    // The special thing about commands is that they can voluntarily release and reacquire
+    // the dispatcher lock at will.  Initially when the command starts running, the
+    // dispatcher lock is held.  However, if the command needs to call into the policy to
+    // do some work, it can release the lock, do the work, then reacquire the lock again
+    // before returning.
+    //
+    // This mechanism is a bit clunky but it helps to preserve the invariant that the dispatch
+    // never calls into the policy while holding its lock.
+    //
+    // Commands are implicitly 'LockedInterruptible'.
+    struct CommandEntry;
+    typedef void (InputDispatcher::*Command)(CommandEntry* commandEntry);
+
+    class Connection;
+    struct CommandEntry : Link<CommandEntry> {
+        CommandEntry(Command command);
+        ~CommandEntry();
+
+        Command command;
+
+        // parameters for the command (usage varies by command)
+        sp<Connection> connection;
+        nsecs_t eventTime;
+        KeyEntry* keyEntry;
+        sp<InputApplicationHandle> inputApplicationHandle;
+        sp<InputWindowHandle> inputWindowHandle;
+        String8 reason;
+        int32_t userActivityEventType;
+        uint32_t seq;
+        bool handled;
+    };
+
+    // Generic queue implementation.
+    template <typename T>
+    struct Queue {
+        T* head;
+        T* tail;
+
+        inline Queue() : head(NULL), tail(NULL) {
+        }
+
+        inline bool isEmpty() const {
+            return !head;
+        }
+
+        inline void enqueueAtTail(T* entry) {
+            entry->prev = tail;
+            if (tail) {
+                tail->next = entry;
+            } else {
+                head = entry;
+            }
+            entry->next = NULL;
+            tail = entry;
+        }
+
+        inline void enqueueAtHead(T* entry) {
+            entry->next = head;
+            if (head) {
+                head->prev = entry;
+            } else {
+                tail = entry;
+            }
+            entry->prev = NULL;
+            head = entry;
+        }
+
+        inline void dequeue(T* entry) {
+            if (entry->prev) {
+                entry->prev->next = entry->next;
+            } else {
+                head = entry->next;
+            }
+            if (entry->next) {
+                entry->next->prev = entry->prev;
+            } else {
+                tail = entry->prev;
+            }
+        }
+
+        inline T* dequeueAtHead() {
+            T* entry = head;
+            head = entry->next;
+            if (head) {
+                head->prev = NULL;
+            } else {
+                tail = NULL;
+            }
+            return entry;
+        }
+
+        uint32_t count() const;
+    };
+
+    /* Specifies which events are to be canceled and why. */
+    struct CancelationOptions {
+        enum Mode {
+            CANCEL_ALL_EVENTS = 0,
+            CANCEL_POINTER_EVENTS = 1,
+            CANCEL_NON_POINTER_EVENTS = 2,
+            CANCEL_FALLBACK_EVENTS = 3,
+        };
+
+        // The criterion to use to determine which events should be canceled.
+        Mode mode;
+
+        // Descriptive reason for the cancelation.
+        const char* reason;
+
+        // The specific keycode of the key event to cancel, or -1 to cancel any key event.
+        int32_t keyCode;
+
+        // The specific device id of events to cancel, or -1 to cancel events from any device.
+        int32_t deviceId;
+
+        CancelationOptions(Mode mode, const char* reason) :
+                mode(mode), reason(reason), keyCode(-1), deviceId(-1) { }
+    };
+
+    /* Tracks dispatched key and motion event state so that cancelation events can be
+     * synthesized when events are dropped. */
+    class InputState {
+    public:
+        InputState();
+        ~InputState();
+
+        // Returns true if there is no state to be canceled.
+        bool isNeutral() const;
+
+        // Returns true if the specified source is known to have received a hover enter
+        // motion event.
+        bool isHovering(int32_t deviceId, uint32_t source, int32_t displayId) const;
+
+        // Records tracking information for a key event that has just been published.
+        // Returns true if the event should be delivered, false if it is inconsistent
+        // and should be skipped.
+        bool trackKey(const KeyEntry* entry, int32_t action, int32_t flags);
+
+        // Records tracking information for a motion event that has just been published.
+        // Returns true if the event should be delivered, false if it is inconsistent
+        // and should be skipped.
+        bool trackMotion(const MotionEntry* entry, int32_t action, int32_t flags);
+
+        // Synthesizes cancelation events for the current state and resets the tracked state.
+        void synthesizeCancelationEvents(nsecs_t currentTime,
+                Vector<EventEntry*>& outEvents, const CancelationOptions& options);
+
+        // Clears the current state.
+        void clear();
+
+        // Copies pointer-related parts of the input state to another instance.
+        void copyPointerStateTo(InputState& other) const;
+
+        // Gets the fallback key associated with a keycode.
+        // Returns -1 if none.
+        // Returns AKEYCODE_UNKNOWN if we are only dispatching the unhandled key to the policy.
+        int32_t getFallbackKey(int32_t originalKeyCode);
+
+        // Sets the fallback key for a particular keycode.
+        void setFallbackKey(int32_t originalKeyCode, int32_t fallbackKeyCode);
+
+        // Removes the fallback key for a particular keycode.
+        void removeFallbackKey(int32_t originalKeyCode);
+
+        inline const KeyedVector<int32_t, int32_t>& getFallbackKeys() const {
+            return mFallbackKeys;
+        }
+
+    private:
+        struct KeyMemento {
+            int32_t deviceId;
+            uint32_t source;
+            int32_t keyCode;
+            int32_t scanCode;
+            int32_t metaState;
+            int32_t flags;
+            nsecs_t downTime;
+            uint32_t policyFlags;
+        };
+
+        struct MotionMemento {
+            int32_t deviceId;
+            uint32_t source;
+            int32_t flags;
+            float xPrecision;
+            float yPrecision;
+            nsecs_t downTime;
+            int32_t displayId;
+            uint32_t pointerCount;
+            PointerProperties pointerProperties[MAX_POINTERS];
+            PointerCoords pointerCoords[MAX_POINTERS];
+            bool hovering;
+            uint32_t policyFlags;
+
+            void setPointers(const MotionEntry* entry);
+        };
+
+        Vector<KeyMemento> mKeyMementos;
+        Vector<MotionMemento> mMotionMementos;
+        KeyedVector<int32_t, int32_t> mFallbackKeys;
+
+        ssize_t findKeyMemento(const KeyEntry* entry) const;
+        ssize_t findMotionMemento(const MotionEntry* entry, bool hovering) const;
+
+        void addKeyMemento(const KeyEntry* entry, int32_t flags);
+        void addMotionMemento(const MotionEntry* entry, int32_t flags, bool hovering);
+
+        static bool shouldCancelKey(const KeyMemento& memento,
+                const CancelationOptions& options);
+        static bool shouldCancelMotion(const MotionMemento& memento,
+                const CancelationOptions& options);
+    };
+
+    /* Manages the dispatch state associated with a single input channel. */
+    class Connection : public RefBase {
+    protected:
+        virtual ~Connection();
+
+    public:
+        enum Status {
+            // Everything is peachy.
+            STATUS_NORMAL,
+            // An unrecoverable communication error has occurred.
+            STATUS_BROKEN,
+            // The input channel has been unregistered.
+            STATUS_ZOMBIE
+        };
+
+        Status status;
+        sp<InputChannel> inputChannel; // never null
+        sp<InputWindowHandle> inputWindowHandle; // may be null
+        bool monitor;
+        InputPublisher inputPublisher;
+        InputState inputState;
+
+        // True if the socket is full and no further events can be published until
+        // the application consumes some of the input.
+        bool inputPublisherBlocked;
+
+        // Queue of events that need to be published to the connection.
+        Queue<DispatchEntry> outboundQueue;
+
+        // Queue of events that have been published to the connection but that have not
+        // yet received a "finished" response from the application.
+        Queue<DispatchEntry> waitQueue;
+
+        explicit Connection(const sp<InputChannel>& inputChannel,
+                const sp<InputWindowHandle>& inputWindowHandle, bool monitor);
+
+        inline const char* getInputChannelName() const { return inputChannel->getName().string(); }
+
+        const char* getWindowName() const;
+        const char* getStatusLabel() const;
+
+        DispatchEntry* findWaitQueueEntry(uint32_t seq);
+    };
+
+    enum DropReason {
+        DROP_REASON_NOT_DROPPED = 0,
+        DROP_REASON_POLICY = 1,
+        DROP_REASON_APP_SWITCH = 2,
+        DROP_REASON_DISABLED = 3,
+        DROP_REASON_BLOCKED = 4,
+        DROP_REASON_STALE = 5,
+    };
+
+    sp<InputDispatcherPolicyInterface> mPolicy;
+    InputDispatcherConfiguration mConfig;
+
+    Mutex mLock;
+
+    Condition mDispatcherIsAliveCondition;
+
+    sp<Looper> mLooper;
+
+    EventEntry* mPendingEvent;
+    Queue<EventEntry> mInboundQueue;
+    Queue<EventEntry> mRecentQueue;
+    Queue<CommandEntry> mCommandQueue;
+
+    void dispatchOnceInnerLocked(nsecs_t* nextWakeupTime);
+
+    // Enqueues an inbound event.  Returns true if mLooper->wake() should be called.
+    bool enqueueInboundEventLocked(EventEntry* entry);
+
+    // Cleans up input state when dropping an inbound event.
+    void dropInboundEventLocked(EventEntry* entry, DropReason dropReason);
+
+    // Adds an event to a queue of recent events for debugging purposes.
+    void addRecentEventLocked(EventEntry* entry);
+
+    // App switch latency optimization.
+    bool mAppSwitchSawKeyDown;
+    nsecs_t mAppSwitchDueTime;
+
+    static bool isAppSwitchKeyCode(int32_t keyCode);
+    bool isAppSwitchKeyEventLocked(KeyEntry* keyEntry);
+    bool isAppSwitchPendingLocked();
+    void resetPendingAppSwitchLocked(bool handled);
+
+    // Stale event latency optimization.
+    static bool isStaleEventLocked(nsecs_t currentTime, EventEntry* entry);
+
+    // Blocked event latency optimization.  Drops old events when the user intends
+    // to transfer focus to a new application.
+    EventEntry* mNextUnblockedEvent;
+
+    sp<InputWindowHandle> findTouchedWindowAtLocked(int32_t displayId, int32_t x, int32_t y);
+
+    // All registered connections mapped by channel file descriptor.
+    KeyedVector<int, sp<Connection> > mConnectionsByFd;
+
+    ssize_t getConnectionIndexLocked(const sp<InputChannel>& inputChannel);
+
+    // Input channels that will receive a copy of all input events.
+    Vector<sp<InputChannel> > mMonitoringChannels;
+
+    // Event injection and synchronization.
+    Condition mInjectionResultAvailableCondition;
+    bool hasInjectionPermission(int32_t injectorPid, int32_t injectorUid);
+    void setInjectionResultLocked(EventEntry* entry, int32_t injectionResult);
+
+    Condition mInjectionSyncFinishedCondition;
+    void incrementPendingForegroundDispatchesLocked(EventEntry* entry);
+    void decrementPendingForegroundDispatchesLocked(EventEntry* entry);
+
+    // Key repeat tracking.
+    struct KeyRepeatState {
+        KeyEntry* lastKeyEntry; // or null if no repeat
+        nsecs_t nextRepeatTime;
+    } mKeyRepeatState;
+
+    void resetKeyRepeatLocked();
+    KeyEntry* synthesizeKeyRepeatLocked(nsecs_t currentTime);
+
+    // Deferred command processing.
+    bool haveCommandsLocked() const;
+    bool runCommandsLockedInterruptible();
+    CommandEntry* postCommandLocked(Command command);
+
+    // Input filter processing.
+    bool shouldSendKeyToInputFilterLocked(const NotifyKeyArgs* args);
+    bool shouldSendMotionToInputFilterLocked(const NotifyMotionArgs* args);
+
+    // Inbound event processing.
+    void drainInboundQueueLocked();
+    void releasePendingEventLocked();
+    void releaseInboundEventLocked(EventEntry* entry);
+
+    // Dispatch state.
+    bool mDispatchEnabled;
+    bool mDispatchFrozen;
+    bool mInputFilterEnabled;
+
+    Vector<sp<InputWindowHandle> > mWindowHandles;
+
+    sp<InputWindowHandle> getWindowHandleLocked(const sp<InputChannel>& inputChannel) const;
+    bool hasWindowHandleLocked(const sp<InputWindowHandle>& windowHandle) const;
+
+    // Focus tracking for keys, trackball, etc.
+    sp<InputWindowHandle> mFocusedWindowHandle;
+
+    // Focus tracking for touch.
+    struct TouchedWindow {
+        sp<InputWindowHandle> windowHandle;
+        int32_t targetFlags;
+        BitSet32 pointerIds;        // zero unless target flag FLAG_SPLIT is set
+    };
+    struct TouchState {
+        bool down;
+        bool split;
+        int32_t deviceId; // id of the device that is currently down, others are rejected
+        uint32_t source;  // source of the device that is current down, others are rejected
+        int32_t displayId; // id to the display that currently has a touch, others are rejected
+        Vector<TouchedWindow> windows;
+
+        TouchState();
+        ~TouchState();
+        void reset();
+        void copyFrom(const TouchState& other);
+        void addOrUpdateWindow(const sp<InputWindowHandle>& windowHandle,
+                int32_t targetFlags, BitSet32 pointerIds);
+        void removeWindow(const sp<InputWindowHandle>& windowHandle);
+        void filterNonAsIsTouchWindows();
+        sp<InputWindowHandle> getFirstForegroundWindowHandle() const;
+        bool isSlippery() const;
+    };
+
+    TouchState mTouchState;
+    TouchState mTempTouchState;
+
+    // Focused application.
+    sp<InputApplicationHandle> mFocusedApplicationHandle;
+
+    // Dispatcher state at time of last ANR.
+    String8 mLastANRState;
+
+    // Dispatch inbound events.
+    bool dispatchConfigurationChangedLocked(
+            nsecs_t currentTime, ConfigurationChangedEntry* entry);
+    bool dispatchDeviceResetLocked(
+            nsecs_t currentTime, DeviceResetEntry* entry);
+    bool dispatchKeyLocked(
+            nsecs_t currentTime, KeyEntry* entry,
+            DropReason* dropReason, nsecs_t* nextWakeupTime);
+    bool dispatchMotionLocked(
+            nsecs_t currentTime, MotionEntry* entry,
+            DropReason* dropReason, nsecs_t* nextWakeupTime);
+    void dispatchEventLocked(nsecs_t currentTime, EventEntry* entry,
+            const Vector<InputTarget>& inputTargets);
+
+    void logOutboundKeyDetailsLocked(const char* prefix, const KeyEntry* entry);
+    void logOutboundMotionDetailsLocked(const char* prefix, const MotionEntry* entry);
+
+    // Keeping track of ANR timeouts.
+    enum InputTargetWaitCause {
+        INPUT_TARGET_WAIT_CAUSE_NONE,
+        INPUT_TARGET_WAIT_CAUSE_SYSTEM_NOT_READY,
+        INPUT_TARGET_WAIT_CAUSE_APPLICATION_NOT_READY,
+    };
+
+    InputTargetWaitCause mInputTargetWaitCause;
+    nsecs_t mInputTargetWaitStartTime;
+    nsecs_t mInputTargetWaitTimeoutTime;
+    bool mInputTargetWaitTimeoutExpired;
+    sp<InputApplicationHandle> mInputTargetWaitApplicationHandle;
+
+    // Contains the last window which received a hover event.
+    sp<InputWindowHandle> mLastHoverWindowHandle;
+
+    // Finding targets for input events.
+    int32_t handleTargetsNotReadyLocked(nsecs_t currentTime, const EventEntry* entry,
+            const sp<InputApplicationHandle>& applicationHandle,
+            const sp<InputWindowHandle>& windowHandle,
+            nsecs_t* nextWakeupTime, const char* reason);
+    void resumeAfterTargetsNotReadyTimeoutLocked(nsecs_t newTimeout,
+            const sp<InputChannel>& inputChannel);
+    nsecs_t getTimeSpentWaitingForApplicationLocked(nsecs_t currentTime);
+    void resetANRTimeoutsLocked();
+
+    int32_t findFocusedWindowTargetsLocked(nsecs_t currentTime, const EventEntry* entry,
+            Vector<InputTarget>& inputTargets, nsecs_t* nextWakeupTime);
+    int32_t findTouchedWindowTargetsLocked(nsecs_t currentTime, const MotionEntry* entry,
+            Vector<InputTarget>& inputTargets, nsecs_t* nextWakeupTime,
+            bool* outConflictingPointerActions);
+
+    void addWindowTargetLocked(const sp<InputWindowHandle>& windowHandle,
+            int32_t targetFlags, BitSet32 pointerIds, Vector<InputTarget>& inputTargets);
+    void addMonitoringTargetsLocked(Vector<InputTarget>& inputTargets);
+
+    void pokeUserActivityLocked(const EventEntry* eventEntry);
+    bool checkInjectionPermission(const sp<InputWindowHandle>& windowHandle,
+            const InjectionState* injectionState);
+    bool isWindowObscuredAtPointLocked(const sp<InputWindowHandle>& windowHandle,
+            int32_t x, int32_t y) const;
+    bool isWindowReadyForMoreInputLocked(nsecs_t currentTime,
+            const sp<InputWindowHandle>& windowHandle, const EventEntry* eventEntry);
+    String8 getApplicationWindowLabelLocked(const sp<InputApplicationHandle>& applicationHandle,
+            const sp<InputWindowHandle>& windowHandle);
+
+    // Manage the dispatch cycle for a single connection.
+    // These methods are deliberately not Interruptible because doing all of the work
+    // with the mutex held makes it easier to ensure that connection invariants are maintained.
+    // If needed, the methods post commands to run later once the critical bits are done.
+    void prepareDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection,
+            EventEntry* eventEntry, const InputTarget* inputTarget);
+    void enqueueDispatchEntriesLocked(nsecs_t currentTime, const sp<Connection>& connection,
+            EventEntry* eventEntry, const InputTarget* inputTarget);
+    void enqueueDispatchEntryLocked(const sp<Connection>& connection,
+            EventEntry* eventEntry, const InputTarget* inputTarget, int32_t dispatchMode);
+    void startDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection);
+    void finishDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection,
+            uint32_t seq, bool handled);
+    void abortBrokenDispatchCycleLocked(nsecs_t currentTime, const sp<Connection>& connection,
+            bool notify);
+    void drainDispatchQueueLocked(Queue<DispatchEntry>* queue);
+    void releaseDispatchEntryLocked(DispatchEntry* dispatchEntry);
+    static int handleReceiveCallback(int fd, int events, void* data);
+
+    void synthesizeCancelationEventsForAllConnectionsLocked(
+            const CancelationOptions& options);
+    void synthesizeCancelationEventsForInputChannelLocked(const sp<InputChannel>& channel,
+            const CancelationOptions& options);
+    void synthesizeCancelationEventsForConnectionLocked(const sp<Connection>& connection,
+            const CancelationOptions& options);
+
+    // Splitting motion events across windows.
+    MotionEntry* splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet32 pointerIds);
+
+    // Reset and drop everything the dispatcher is doing.
+    void resetAndDropEverythingLocked(const char* reason);
+
+    // Dump state.
+    void dumpDispatchStateLocked(String8& dump);
+    void logDispatchStateLocked();
+
+    // Registration.
+    void removeMonitorChannelLocked(const sp<InputChannel>& inputChannel);
+    status_t unregisterInputChannelLocked(const sp<InputChannel>& inputChannel, bool notify);
+
+    // Add or remove a connection to the mActiveConnections vector.
+    void activateConnectionLocked(Connection* connection);
+    void deactivateConnectionLocked(Connection* connection);
+
+    // Interesting events that we might like to log or tell the framework about.
+    void onDispatchCycleFinishedLocked(
+            nsecs_t currentTime, const sp<Connection>& connection, uint32_t seq, bool handled);
+    void onDispatchCycleBrokenLocked(
+            nsecs_t currentTime, const sp<Connection>& connection);
+    void onANRLocked(
+            nsecs_t currentTime, const sp<InputApplicationHandle>& applicationHandle,
+            const sp<InputWindowHandle>& windowHandle,
+            nsecs_t eventTime, nsecs_t waitStartTime, const char* reason);
+
+    // Outbound policy interactions.
+    void doNotifyConfigurationChangedInterruptible(CommandEntry* commandEntry);
+    void doNotifyInputChannelBrokenLockedInterruptible(CommandEntry* commandEntry);
+    void doNotifyANRLockedInterruptible(CommandEntry* commandEntry);
+    void doInterceptKeyBeforeDispatchingLockedInterruptible(CommandEntry* commandEntry);
+    void doDispatchCycleFinishedLockedInterruptible(CommandEntry* commandEntry);
+    bool afterKeyEventLockedInterruptible(const sp<Connection>& connection,
+            DispatchEntry* dispatchEntry, KeyEntry* keyEntry, bool handled);
+    bool afterMotionEventLockedInterruptible(const sp<Connection>& connection,
+            DispatchEntry* dispatchEntry, MotionEntry* motionEntry, bool handled);
+    void doPokeUserActivityLockedInterruptible(CommandEntry* commandEntry);
+    void initializeKeyEvent(KeyEvent* event, const KeyEntry* entry);
+
+    // Statistics gathering.
+    void updateDispatchStatisticsLocked(nsecs_t currentTime, const EventEntry* entry,
+            int32_t injectionResult, nsecs_t timeSpentWaitingForApplication);
+    void traceInboundQueueLengthLocked();
+    void traceOutboundQueueLengthLocked(const sp<Connection>& connection);
+    void traceWaitQueueLengthLocked(const sp<Connection>& connection);
+};
+
+/* Enqueues and dispatches input events, endlessly. */
+class InputDispatcherThread : public Thread {
+public:
+    explicit InputDispatcherThread(const sp<InputDispatcherInterface>& dispatcher);
+    ~InputDispatcherThread();
+
+private:
+    virtual bool threadLoop();
+
+    sp<InputDispatcherInterface> mDispatcher;
+};
+
+} // namespace android
+
+#endif // _UI_INPUT_DISPATCHER_H
diff --git a/libs/input/InputListener.cpp b/libs/input/InputListener.cpp
new file mode 100644
index 0000000..85bb0ed
--- /dev/null
+++ b/libs/input/InputListener.cpp
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputListener"
+
+//#define LOG_NDEBUG 0
+
+#include "InputListener.h"
+
+#include <cutils/log.h>
+
+namespace android {
+
+// --- NotifyConfigurationChangedArgs ---
+
+NotifyConfigurationChangedArgs::NotifyConfigurationChangedArgs(nsecs_t eventTime) :
+        eventTime(eventTime) {
+}
+
+NotifyConfigurationChangedArgs::NotifyConfigurationChangedArgs(
+        const NotifyConfigurationChangedArgs& other) :
+        eventTime(other.eventTime) {
+}
+
+void NotifyConfigurationChangedArgs::notify(const sp<InputListenerInterface>& listener) const {
+    listener->notifyConfigurationChanged(this);
+}
+
+
+// --- NotifyKeyArgs ---
+
+NotifyKeyArgs::NotifyKeyArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source,
+        uint32_t policyFlags,
+        int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
+        int32_t metaState, nsecs_t downTime) :
+        eventTime(eventTime), deviceId(deviceId), source(source), policyFlags(policyFlags),
+        action(action), flags(flags), keyCode(keyCode), scanCode(scanCode),
+        metaState(metaState), downTime(downTime) {
+}
+
+NotifyKeyArgs::NotifyKeyArgs(const NotifyKeyArgs& other) :
+        eventTime(other.eventTime), deviceId(other.deviceId), source(other.source),
+        policyFlags(other.policyFlags),
+        action(other.action), flags(other.flags),
+        keyCode(other.keyCode), scanCode(other.scanCode),
+        metaState(other.metaState), downTime(other.downTime) {
+}
+
+void NotifyKeyArgs::notify(const sp<InputListenerInterface>& listener) const {
+    listener->notifyKey(this);
+}
+
+
+// --- NotifyMotionArgs ---
+
+NotifyMotionArgs::NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source,
+        uint32_t policyFlags,
+        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
+        int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
+        const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
+        float xPrecision, float yPrecision, nsecs_t downTime) :
+        eventTime(eventTime), deviceId(deviceId), source(source), policyFlags(policyFlags),
+        action(action), flags(flags), metaState(metaState), buttonState(buttonState),
+        edgeFlags(edgeFlags), displayId(displayId), pointerCount(pointerCount),
+        xPrecision(xPrecision), yPrecision(yPrecision), downTime(downTime) {
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        this->pointerProperties[i].copyFrom(pointerProperties[i]);
+        this->pointerCoords[i].copyFrom(pointerCoords[i]);
+    }
+}
+
+NotifyMotionArgs::NotifyMotionArgs(const NotifyMotionArgs& other) :
+        eventTime(other.eventTime), deviceId(other.deviceId), source(other.source),
+        policyFlags(other.policyFlags),
+        action(other.action), flags(other.flags),
+        metaState(other.metaState), buttonState(other.buttonState),
+        edgeFlags(other.edgeFlags), displayId(other.displayId),
+        pointerCount(other.pointerCount),
+        xPrecision(other.xPrecision), yPrecision(other.yPrecision), downTime(other.downTime) {
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        pointerProperties[i].copyFrom(other.pointerProperties[i]);
+        pointerCoords[i].copyFrom(other.pointerCoords[i]);
+    }
+}
+
+void NotifyMotionArgs::notify(const sp<InputListenerInterface>& listener) const {
+    listener->notifyMotion(this);
+}
+
+
+// --- NotifySwitchArgs ---
+
+NotifySwitchArgs::NotifySwitchArgs(nsecs_t eventTime, uint32_t policyFlags,
+        uint32_t switchValues, uint32_t switchMask) :
+        eventTime(eventTime), policyFlags(policyFlags),
+        switchValues(switchValues), switchMask(switchMask) {
+}
+
+NotifySwitchArgs::NotifySwitchArgs(const NotifySwitchArgs& other) :
+        eventTime(other.eventTime), policyFlags(other.policyFlags),
+        switchValues(other.switchValues), switchMask(other.switchMask) {
+}
+
+void NotifySwitchArgs::notify(const sp<InputListenerInterface>& listener) const {
+    listener->notifySwitch(this);
+}
+
+
+// --- NotifyDeviceResetArgs ---
+
+NotifyDeviceResetArgs::NotifyDeviceResetArgs(nsecs_t eventTime, int32_t deviceId) :
+        eventTime(eventTime), deviceId(deviceId) {
+}
+
+NotifyDeviceResetArgs::NotifyDeviceResetArgs(const NotifyDeviceResetArgs& other) :
+        eventTime(other.eventTime), deviceId(other.deviceId) {
+}
+
+void NotifyDeviceResetArgs::notify(const sp<InputListenerInterface>& listener) const {
+    listener->notifyDeviceReset(this);
+}
+
+
+// --- QueuedInputListener ---
+
+QueuedInputListener::QueuedInputListener(const sp<InputListenerInterface>& innerListener) :
+        mInnerListener(innerListener) {
+}
+
+QueuedInputListener::~QueuedInputListener() {
+    size_t count = mArgsQueue.size();
+    for (size_t i = 0; i < count; i++) {
+        delete mArgsQueue[i];
+    }
+}
+
+void QueuedInputListener::notifyConfigurationChanged(
+        const NotifyConfigurationChangedArgs* args) {
+    mArgsQueue.push(new NotifyConfigurationChangedArgs(*args));
+}
+
+void QueuedInputListener::notifyKey(const NotifyKeyArgs* args) {
+    mArgsQueue.push(new NotifyKeyArgs(*args));
+}
+
+void QueuedInputListener::notifyMotion(const NotifyMotionArgs* args) {
+    mArgsQueue.push(new NotifyMotionArgs(*args));
+}
+
+void QueuedInputListener::notifySwitch(const NotifySwitchArgs* args) {
+    mArgsQueue.push(new NotifySwitchArgs(*args));
+}
+
+void QueuedInputListener::notifyDeviceReset(const NotifyDeviceResetArgs* args) {
+    mArgsQueue.push(new NotifyDeviceResetArgs(*args));
+}
+
+void QueuedInputListener::flush() {
+    size_t count = mArgsQueue.size();
+    for (size_t i = 0; i < count; i++) {
+        NotifyArgs* args = mArgsQueue[i];
+        args->notify(mInnerListener);
+        delete args;
+    }
+    mArgsQueue.clear();
+}
+
+
+} // namespace android
diff --git a/libs/input/InputListener.h b/libs/input/InputListener.h
new file mode 100644
index 0000000..78ae10f
--- /dev/null
+++ b/libs/input/InputListener.h
@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _UI_INPUT_LISTENER_H
+#define _UI_INPUT_LISTENER_H
+
+#include <input/Input.h>
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
+
+namespace android {
+
+class InputListenerInterface;
+
+
+/* Superclass of all input event argument objects */
+struct NotifyArgs {
+    virtual ~NotifyArgs() { }
+
+    virtual void notify(const sp<InputListenerInterface>& listener) const = 0;
+};
+
+
+/* Describes a configuration change event. */
+struct NotifyConfigurationChangedArgs : public NotifyArgs {
+    nsecs_t eventTime;
+
+    inline NotifyConfigurationChangedArgs() { }
+
+    NotifyConfigurationChangedArgs(nsecs_t eventTime);
+
+    NotifyConfigurationChangedArgs(const NotifyConfigurationChangedArgs& other);
+
+    virtual ~NotifyConfigurationChangedArgs() { }
+
+    virtual void notify(const sp<InputListenerInterface>& listener) const;
+};
+
+
+/* Describes a key event. */
+struct NotifyKeyArgs : public NotifyArgs {
+    nsecs_t eventTime;
+    int32_t deviceId;
+    uint32_t source;
+    uint32_t policyFlags;
+    int32_t action;
+    int32_t flags;
+    int32_t keyCode;
+    int32_t scanCode;
+    int32_t metaState;
+    nsecs_t downTime;
+
+    inline NotifyKeyArgs() { }
+
+    NotifyKeyArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source, uint32_t policyFlags,
+            int32_t action, int32_t flags, int32_t keyCode, int32_t scanCode,
+            int32_t metaState, nsecs_t downTime);
+
+    NotifyKeyArgs(const NotifyKeyArgs& other);
+
+    virtual ~NotifyKeyArgs() { }
+
+    virtual void notify(const sp<InputListenerInterface>& listener) const;
+};
+
+
+/* Describes a motion event. */
+struct NotifyMotionArgs : public NotifyArgs {
+    nsecs_t eventTime;
+    int32_t deviceId;
+    uint32_t source;
+    uint32_t policyFlags;
+    int32_t action;
+    int32_t flags;
+    int32_t metaState;
+    int32_t buttonState;
+    int32_t edgeFlags;
+    int32_t displayId;
+    uint32_t pointerCount;
+    PointerProperties pointerProperties[MAX_POINTERS];
+    PointerCoords pointerCoords[MAX_POINTERS];
+    float xPrecision;
+    float yPrecision;
+    nsecs_t downTime;
+
+    inline NotifyMotionArgs() { }
+
+    NotifyMotionArgs(nsecs_t eventTime, int32_t deviceId, uint32_t source, uint32_t policyFlags,
+            int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
+            int32_t edgeFlags, int32_t displayId, uint32_t pointerCount,
+            const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
+            float xPrecision, float yPrecision, nsecs_t downTime);
+
+    NotifyMotionArgs(const NotifyMotionArgs& other);
+
+    virtual ~NotifyMotionArgs() { }
+
+    virtual void notify(const sp<InputListenerInterface>& listener) const;
+};
+
+
+/* Describes a switch event. */
+struct NotifySwitchArgs : public NotifyArgs {
+    nsecs_t eventTime;
+    uint32_t policyFlags;
+    uint32_t switchValues;
+    uint32_t switchMask;
+
+    inline NotifySwitchArgs() { }
+
+    NotifySwitchArgs(nsecs_t eventTime, uint32_t policyFlags,
+            uint32_t switchValues, uint32_t switchMask);
+
+    NotifySwitchArgs(const NotifySwitchArgs& other);
+
+    virtual ~NotifySwitchArgs() { }
+
+    virtual void notify(const sp<InputListenerInterface>& listener) const;
+};
+
+
+/* Describes a device reset event, such as when a device is added,
+ * reconfigured, or removed. */
+struct NotifyDeviceResetArgs : public NotifyArgs {
+    nsecs_t eventTime;
+    int32_t deviceId;
+
+    inline NotifyDeviceResetArgs() { }
+
+    NotifyDeviceResetArgs(nsecs_t eventTime, int32_t deviceId);
+
+    NotifyDeviceResetArgs(const NotifyDeviceResetArgs& other);
+
+    virtual ~NotifyDeviceResetArgs() { }
+
+    virtual void notify(const sp<InputListenerInterface>& listener) const;
+};
+
+
+/*
+ * The interface used by the InputReader to notify the InputListener about input events.
+ */
+class InputListenerInterface : public virtual RefBase {
+protected:
+    InputListenerInterface() { }
+    virtual ~InputListenerInterface() { }
+
+public:
+    virtual void notifyConfigurationChanged(const NotifyConfigurationChangedArgs* args) = 0;
+    virtual void notifyKey(const NotifyKeyArgs* args) = 0;
+    virtual void notifyMotion(const NotifyMotionArgs* args) = 0;
+    virtual void notifySwitch(const NotifySwitchArgs* args) = 0;
+    virtual void notifyDeviceReset(const NotifyDeviceResetArgs* args) = 0;
+};
+
+
+/*
+ * An implementation of the listener interface that queues up and defers dispatch
+ * of decoded events until flushed.
+ */
+class QueuedInputListener : public InputListenerInterface {
+protected:
+    virtual ~QueuedInputListener();
+
+public:
+    QueuedInputListener(const sp<InputListenerInterface>& innerListener);
+
+    virtual void notifyConfigurationChanged(const NotifyConfigurationChangedArgs* args);
+    virtual void notifyKey(const NotifyKeyArgs* args);
+    virtual void notifyMotion(const NotifyMotionArgs* args);
+    virtual void notifySwitch(const NotifySwitchArgs* args);
+    virtual void notifyDeviceReset(const NotifyDeviceResetArgs* args);
+
+    void flush();
+
+private:
+    sp<InputListenerInterface> mInnerListener;
+    Vector<NotifyArgs*> mArgsQueue;
+};
+
+} // namespace android
+
+#endif // _UI_INPUT_LISTENER_H
diff --git a/libs/input/InputManager.cpp b/libs/input/InputManager.cpp
new file mode 100644
index 0000000..6a6547b
--- /dev/null
+++ b/libs/input/InputManager.cpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputManager"
+
+//#define LOG_NDEBUG 0
+
+#include "InputManager.h"
+
+#include <cutils/log.h>
+
+namespace android {
+
+InputManager::InputManager(
+        const sp<EventHubInterface>& eventHub,
+        const sp<InputReaderPolicyInterface>& readerPolicy,
+        const sp<InputDispatcherPolicyInterface>& dispatcherPolicy) {
+    mDispatcher = new InputDispatcher(dispatcherPolicy);
+    mReader = new InputReader(eventHub, readerPolicy, mDispatcher);
+    initialize();
+}
+
+InputManager::InputManager(
+        const sp<InputReaderInterface>& reader,
+        const sp<InputDispatcherInterface>& dispatcher) :
+        mReader(reader),
+        mDispatcher(dispatcher) {
+    initialize();
+}
+
+InputManager::~InputManager() {
+    stop();
+}
+
+void InputManager::initialize() {
+    mReaderThread = new InputReaderThread(mReader);
+    mDispatcherThread = new InputDispatcherThread(mDispatcher);
+}
+
+status_t InputManager::start() {
+    status_t result = mDispatcherThread->run("InputDispatcher", PRIORITY_URGENT_DISPLAY);
+    if (result) {
+        ALOGE("Could not start InputDispatcher thread due to error %d.", result);
+        return result;
+    }
+
+    result = mReaderThread->run("InputReader", PRIORITY_URGENT_DISPLAY);
+    if (result) {
+        ALOGE("Could not start InputReader thread due to error %d.", result);
+
+        mDispatcherThread->requestExit();
+        return result;
+    }
+
+    return OK;
+}
+
+status_t InputManager::stop() {
+    status_t result = mReaderThread->requestExitAndWait();
+    if (result) {
+        ALOGW("Could not stop InputReader thread due to error %d.", result);
+    }
+
+    result = mDispatcherThread->requestExitAndWait();
+    if (result) {
+        ALOGW("Could not stop InputDispatcher thread due to error %d.", result);
+    }
+
+    return OK;
+}
+
+sp<InputReaderInterface> InputManager::getReader() {
+    return mReader;
+}
+
+sp<InputDispatcherInterface> InputManager::getDispatcher() {
+    return mDispatcher;
+}
+
+} // namespace android
diff --git a/libs/input/InputManager.h b/libs/input/InputManager.h
new file mode 100644
index 0000000..a213b2d
--- /dev/null
+++ b/libs/input/InputManager.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _UI_INPUT_MANAGER_H
+#define _UI_INPUT_MANAGER_H
+
+/**
+ * Native input manager.
+ */
+
+#include "EventHub.h"
+#include "InputReader.h"
+#include "InputDispatcher.h"
+
+#include <input/Input.h>
+#include <input/InputTransport.h>
+#include <utils/Errors.h>
+#include <utils/Vector.h>
+#include <utils/Timers.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+
+namespace android {
+
+/*
+ * The input manager is the core of the system event processing.
+ *
+ * The input manager uses two threads.
+ *
+ * 1. The InputReaderThread (called "InputReader") reads and preprocesses raw input events,
+ *    applies policy, and posts messages to a queue managed by the DispatcherThread.
+ * 2. The InputDispatcherThread (called "InputDispatcher") thread waits for new events on the
+ *    queue and asynchronously dispatches them to applications.
+ *
+ * By design, the InputReaderThread class and InputDispatcherThread class do not share any
+ * internal state.  Moreover, all communication is done one way from the InputReaderThread
+ * into the InputDispatcherThread and never the reverse.  Both classes may interact with the
+ * InputDispatchPolicy, however.
+ *
+ * The InputManager class never makes any calls into Java itself.  Instead, the
+ * InputDispatchPolicy is responsible for performing all external interactions with the
+ * system, including calling DVM services.
+ */
+class InputManagerInterface : public virtual RefBase {
+protected:
+    InputManagerInterface() { }
+    virtual ~InputManagerInterface() { }
+
+public:
+    /* Starts the input manager threads. */
+    virtual status_t start() = 0;
+
+    /* Stops the input manager threads and waits for them to exit. */
+    virtual status_t stop() = 0;
+
+    /* Gets the input reader. */
+    virtual sp<InputReaderInterface> getReader() = 0;
+
+    /* Gets the input dispatcher. */
+    virtual sp<InputDispatcherInterface> getDispatcher() = 0;
+};
+
+class InputManager : public InputManagerInterface {
+protected:
+    virtual ~InputManager();
+
+public:
+    InputManager(
+            const sp<EventHubInterface>& eventHub,
+            const sp<InputReaderPolicyInterface>& readerPolicy,
+            const sp<InputDispatcherPolicyInterface>& dispatcherPolicy);
+
+    // (used for testing purposes)
+    InputManager(
+            const sp<InputReaderInterface>& reader,
+            const sp<InputDispatcherInterface>& dispatcher);
+
+    virtual status_t start();
+    virtual status_t stop();
+
+    virtual sp<InputReaderInterface> getReader();
+    virtual sp<InputDispatcherInterface> getDispatcher();
+
+private:
+    sp<InputReaderInterface> mReader;
+    sp<InputReaderThread> mReaderThread;
+
+    sp<InputDispatcherInterface> mDispatcher;
+    sp<InputDispatcherThread> mDispatcherThread;
+
+    void initialize();
+};
+
+} // namespace android
+
+#endif // _UI_INPUT_MANAGER_H
diff --git a/libs/input/InputReader.cpp b/libs/input/InputReader.cpp
new file mode 100644
index 0000000..94e2a80
--- /dev/null
+++ b/libs/input/InputReader.cpp
@@ -0,0 +1,6530 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputReader"
+
+//#define LOG_NDEBUG 0
+
+// Log debug messages for each raw event received from the EventHub.
+#define DEBUG_RAW_EVENTS 0
+
+// Log debug messages about touch screen filtering hacks.
+#define DEBUG_HACKS 0
+
+// Log debug messages about virtual key processing.
+#define DEBUG_VIRTUAL_KEYS 0
+
+// Log debug messages about pointers.
+#define DEBUG_POINTERS 0
+
+// Log debug messages about pointer assignment calculations.
+#define DEBUG_POINTER_ASSIGNMENT 0
+
+// Log debug messages about gesture detection.
+#define DEBUG_GESTURES 0
+
+// Log debug messages about the vibrator.
+#define DEBUG_VIBRATOR 0
+
+#include "InputReader.h"
+
+#include <cutils/log.h>
+#include <input/Keyboard.h>
+#include <input/VirtualKeyMap.h>
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <math.h>
+
+#define INDENT "  "
+#define INDENT2 "    "
+#define INDENT3 "      "
+#define INDENT4 "        "
+#define INDENT5 "          "
+
+namespace android {
+
+// --- Constants ---
+
+// Maximum number of slots supported when using the slot-based Multitouch Protocol B.
+static const size_t MAX_SLOTS = 32;
+
+// --- Static Functions ---
+
+template<typename T>
+inline static T abs(const T& value) {
+    return value < 0 ? - value : value;
+}
+
+template<typename T>
+inline static T min(const T& a, const T& b) {
+    return a < b ? a : b;
+}
+
+template<typename T>
+inline static void swap(T& a, T& b) {
+    T temp = a;
+    a = b;
+    b = temp;
+}
+
+inline static float avg(float x, float y) {
+    return (x + y) / 2;
+}
+
+inline static float distance(float x1, float y1, float x2, float y2) {
+    return hypotf(x1 - x2, y1 - y2);
+}
+
+inline static int32_t signExtendNybble(int32_t value) {
+    return value >= 8 ? value - 16 : value;
+}
+
+static inline const char* toString(bool value) {
+    return value ? "true" : "false";
+}
+
+static int32_t rotateValueUsingRotationMap(int32_t value, int32_t orientation,
+        const int32_t map[][4], size_t mapSize) {
+    if (orientation != DISPLAY_ORIENTATION_0) {
+        for (size_t i = 0; i < mapSize; i++) {
+            if (value == map[i][0]) {
+                return map[i][orientation];
+            }
+        }
+    }
+    return value;
+}
+
+static const int32_t keyCodeRotationMap[][4] = {
+        // key codes enumerated counter-clockwise with the original (unrotated) key first
+        // no rotation,        90 degree rotation,  180 degree rotation, 270 degree rotation
+        { AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT },
+        { AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN },
+        { AKEYCODE_DPAD_UP,     AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT },
+        { AKEYCODE_DPAD_LEFT,   AKEYCODE_DPAD_DOWN,   AKEYCODE_DPAD_RIGHT,  AKEYCODE_DPAD_UP },
+};
+static const size_t keyCodeRotationMapSize =
+        sizeof(keyCodeRotationMap) / sizeof(keyCodeRotationMap[0]);
+
+static int32_t rotateKeyCode(int32_t keyCode, int32_t orientation) {
+    return rotateValueUsingRotationMap(keyCode, orientation,
+            keyCodeRotationMap, keyCodeRotationMapSize);
+}
+
+static void rotateDelta(int32_t orientation, float* deltaX, float* deltaY) {
+    float temp;
+    switch (orientation) {
+    case DISPLAY_ORIENTATION_90:
+        temp = *deltaX;
+        *deltaX = *deltaY;
+        *deltaY = -temp;
+        break;
+
+    case DISPLAY_ORIENTATION_180:
+        *deltaX = -*deltaX;
+        *deltaY = -*deltaY;
+        break;
+
+    case DISPLAY_ORIENTATION_270:
+        temp = *deltaX;
+        *deltaX = -*deltaY;
+        *deltaY = temp;
+        break;
+    }
+}
+
+static inline bool sourcesMatchMask(uint32_t sources, uint32_t sourceMask) {
+    return (sources & sourceMask & ~ AINPUT_SOURCE_CLASS_MASK) != 0;
+}
+
+// Returns true if the pointer should be reported as being down given the specified
+// button states.  This determines whether the event is reported as a touch event.
+static bool isPointerDown(int32_t buttonState) {
+    return buttonState &
+            (AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY
+                    | AMOTION_EVENT_BUTTON_TERTIARY);
+}
+
+static float calculateCommonVector(float a, float b) {
+    if (a > 0 && b > 0) {
+        return a < b ? a : b;
+    } else if (a < 0 && b < 0) {
+        return a > b ? a : b;
+    } else {
+        return 0;
+    }
+}
+
+static void synthesizeButtonKey(InputReaderContext* context, int32_t action,
+        nsecs_t when, int32_t deviceId, uint32_t source,
+        uint32_t policyFlags, int32_t lastButtonState, int32_t currentButtonState,
+        int32_t buttonState, int32_t keyCode) {
+    if (
+            (action == AKEY_EVENT_ACTION_DOWN
+                    && !(lastButtonState & buttonState)
+                    && (currentButtonState & buttonState))
+            || (action == AKEY_EVENT_ACTION_UP
+                    && (lastButtonState & buttonState)
+                    && !(currentButtonState & buttonState))) {
+        NotifyKeyArgs args(when, deviceId, source, policyFlags,
+                action, 0, keyCode, 0, context->getGlobalMetaState(), when);
+        context->getListener()->notifyKey(&args);
+    }
+}
+
+static void synthesizeButtonKeys(InputReaderContext* context, int32_t action,
+        nsecs_t when, int32_t deviceId, uint32_t source,
+        uint32_t policyFlags, int32_t lastButtonState, int32_t currentButtonState) {
+    synthesizeButtonKey(context, action, when, deviceId, source, policyFlags,
+            lastButtonState, currentButtonState,
+            AMOTION_EVENT_BUTTON_BACK, AKEYCODE_BACK);
+    synthesizeButtonKey(context, action, when, deviceId, source, policyFlags,
+            lastButtonState, currentButtonState,
+            AMOTION_EVENT_BUTTON_FORWARD, AKEYCODE_FORWARD);
+}
+
+
+// --- InputReaderConfiguration ---
+
+bool InputReaderConfiguration::getDisplayInfo(bool external, DisplayViewport* outViewport) const {
+    const DisplayViewport& viewport = external ? mExternalDisplay : mInternalDisplay;
+    if (viewport.displayId >= 0) {
+        *outViewport = viewport;
+        return true;
+    }
+    return false;
+}
+
+void InputReaderConfiguration::setDisplayInfo(bool external, const DisplayViewport& viewport) {
+    DisplayViewport& v = external ? mExternalDisplay : mInternalDisplay;
+    v = viewport;
+}
+
+
+// --- InputReader ---
+
+InputReader::InputReader(const sp<EventHubInterface>& eventHub,
+        const sp<InputReaderPolicyInterface>& policy,
+        const sp<InputListenerInterface>& listener) :
+        mContext(this), mEventHub(eventHub), mPolicy(policy),
+        mGlobalMetaState(0), mGeneration(1),
+        mDisableVirtualKeysTimeout(LLONG_MIN), mNextTimeout(LLONG_MAX),
+        mConfigurationChangesToRefresh(0) {
+    mQueuedListener = new QueuedInputListener(listener);
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        refreshConfigurationLocked(0);
+        updateGlobalMetaStateLocked();
+    } // release lock
+}
+
+InputReader::~InputReader() {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        delete mDevices.valueAt(i);
+    }
+}
+
+void InputReader::loopOnce() {
+    int32_t oldGeneration;
+    int32_t timeoutMillis;
+    bool inputDevicesChanged = false;
+    Vector<InputDeviceInfo> inputDevices;
+    { // acquire lock
+        AutoMutex _l(mLock);
+
+        oldGeneration = mGeneration;
+        timeoutMillis = -1;
+
+        uint32_t changes = mConfigurationChangesToRefresh;
+        if (changes) {
+            mConfigurationChangesToRefresh = 0;
+            timeoutMillis = 0;
+            refreshConfigurationLocked(changes);
+        } else if (mNextTimeout != LLONG_MAX) {
+            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+            timeoutMillis = toMillisecondTimeoutDelay(now, mNextTimeout);
+        }
+    } // release lock
+
+    size_t count = mEventHub->getEvents(timeoutMillis, mEventBuffer, EVENT_BUFFER_SIZE);
+
+    { // acquire lock
+        AutoMutex _l(mLock);
+        mReaderIsAliveCondition.broadcast();
+
+        if (count) {
+            processEventsLocked(mEventBuffer, count);
+        }
+
+        if (mNextTimeout != LLONG_MAX) {
+            nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+            if (now >= mNextTimeout) {
+#if DEBUG_RAW_EVENTS
+                ALOGD("Timeout expired, latency=%0.3fms", (now - mNextTimeout) * 0.000001f);
+#endif
+                mNextTimeout = LLONG_MAX;
+                timeoutExpiredLocked(now);
+            }
+        }
+
+        if (oldGeneration != mGeneration) {
+            inputDevicesChanged = true;
+            getInputDevicesLocked(inputDevices);
+        }
+    } // release lock
+
+    // Send out a message that the describes the changed input devices.
+    if (inputDevicesChanged) {
+        mPolicy->notifyInputDevicesChanged(inputDevices);
+    }
+
+    // Flush queued events out to the listener.
+    // This must happen outside of the lock because the listener could potentially call
+    // back into the InputReader's methods, such as getScanCodeState, or become blocked
+    // on another thread similarly waiting to acquire the InputReader lock thereby
+    // resulting in a deadlock.  This situation is actually quite plausible because the
+    // listener is actually the input dispatcher, which calls into the window manager,
+    // which occasionally calls into the input reader.
+    mQueuedListener->flush();
+}
+
+void InputReader::processEventsLocked(const RawEvent* rawEvents, size_t count) {
+    for (const RawEvent* rawEvent = rawEvents; count;) {
+        int32_t type = rawEvent->type;
+        size_t batchSize = 1;
+        if (type < EventHubInterface::FIRST_SYNTHETIC_EVENT) {
+            int32_t deviceId = rawEvent->deviceId;
+            while (batchSize < count) {
+                if (rawEvent[batchSize].type >= EventHubInterface::FIRST_SYNTHETIC_EVENT
+                        || rawEvent[batchSize].deviceId != deviceId) {
+                    break;
+                }
+                batchSize += 1;
+            }
+#if DEBUG_RAW_EVENTS
+            ALOGD("BatchSize: %d Count: %d", batchSize, count);
+#endif
+            processEventsForDeviceLocked(deviceId, rawEvent, batchSize);
+        } else {
+            switch (rawEvent->type) {
+            case EventHubInterface::DEVICE_ADDED:
+                addDeviceLocked(rawEvent->when, rawEvent->deviceId);
+                break;
+            case EventHubInterface::DEVICE_REMOVED:
+                removeDeviceLocked(rawEvent->when, rawEvent->deviceId);
+                break;
+            case EventHubInterface::FINISHED_DEVICE_SCAN:
+                handleConfigurationChangedLocked(rawEvent->when);
+                break;
+            default:
+                ALOG_ASSERT(false); // can't happen
+                break;
+            }
+        }
+        count -= batchSize;
+        rawEvent += batchSize;
+    }
+}
+
+void InputReader::addDeviceLocked(nsecs_t when, int32_t deviceId) {
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex >= 0) {
+        ALOGW("Ignoring spurious device added event for deviceId %d.", deviceId);
+        return;
+    }
+
+    InputDeviceIdentifier identifier = mEventHub->getDeviceIdentifier(deviceId);
+    uint32_t classes = mEventHub->getDeviceClasses(deviceId);
+    int32_t controllerNumber = mEventHub->getDeviceControllerNumber(deviceId);
+
+    InputDevice* device = createDeviceLocked(deviceId, controllerNumber, identifier, classes);
+    device->configure(when, &mConfig, 0);
+    device->reset(when);
+
+    if (device->isIgnored()) {
+        ALOGI("Device added: id=%d, name='%s' (ignored non-input device)", deviceId,
+                identifier.name.string());
+    } else {
+        ALOGI("Device added: id=%d, name='%s', sources=0x%08x", deviceId,
+                identifier.name.string(), device->getSources());
+    }
+
+    mDevices.add(deviceId, device);
+    bumpGenerationLocked();
+}
+
+void InputReader::removeDeviceLocked(nsecs_t when, int32_t deviceId) {
+    InputDevice* device = NULL;
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex < 0) {
+        ALOGW("Ignoring spurious device removed event for deviceId %d.", deviceId);
+        return;
+    }
+
+    device = mDevices.valueAt(deviceIndex);
+    mDevices.removeItemsAt(deviceIndex, 1);
+    bumpGenerationLocked();
+
+    if (device->isIgnored()) {
+        ALOGI("Device removed: id=%d, name='%s' (ignored non-input device)",
+                device->getId(), device->getName().string());
+    } else {
+        ALOGI("Device removed: id=%d, name='%s', sources=0x%08x",
+                device->getId(), device->getName().string(), device->getSources());
+    }
+
+    device->reset(when);
+    delete device;
+}
+
+InputDevice* InputReader::createDeviceLocked(int32_t deviceId, int32_t controllerNumber,
+        const InputDeviceIdentifier& identifier, uint32_t classes) {
+    InputDevice* device = new InputDevice(&mContext, deviceId, bumpGenerationLocked(),
+            controllerNumber, identifier, classes);
+
+    // External devices.
+    if (classes & INPUT_DEVICE_CLASS_EXTERNAL) {
+        device->setExternal(true);
+    }
+
+    // Switch-like devices.
+    if (classes & INPUT_DEVICE_CLASS_SWITCH) {
+        device->addMapper(new SwitchInputMapper(device));
+    }
+
+    // Vibrator-like devices.
+    if (classes & INPUT_DEVICE_CLASS_VIBRATOR) {
+        device->addMapper(new VibratorInputMapper(device));
+    }
+
+    // Keyboard-like devices.
+    uint32_t keyboardSource = 0;
+    int32_t keyboardType = AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC;
+    if (classes & INPUT_DEVICE_CLASS_KEYBOARD) {
+        keyboardSource |= AINPUT_SOURCE_KEYBOARD;
+    }
+    if (classes & INPUT_DEVICE_CLASS_ALPHAKEY) {
+        keyboardType = AINPUT_KEYBOARD_TYPE_ALPHABETIC;
+    }
+    if (classes & INPUT_DEVICE_CLASS_DPAD) {
+        keyboardSource |= AINPUT_SOURCE_DPAD;
+    }
+    if (classes & INPUT_DEVICE_CLASS_GAMEPAD) {
+        keyboardSource |= AINPUT_SOURCE_GAMEPAD;
+    }
+
+    if (keyboardSource != 0) {
+        device->addMapper(new KeyboardInputMapper(device, keyboardSource, keyboardType));
+    }
+
+    // Cursor-like devices.
+    if (classes & INPUT_DEVICE_CLASS_CURSOR) {
+        device->addMapper(new CursorInputMapper(device));
+    }
+
+    // Touchscreens and touchpad devices.
+    if (classes & INPUT_DEVICE_CLASS_TOUCH_MT) {
+        device->addMapper(new MultiTouchInputMapper(device));
+    } else if (classes & INPUT_DEVICE_CLASS_TOUCH) {
+        device->addMapper(new SingleTouchInputMapper(device));
+    }
+
+    // Joystick-like devices.
+    if (classes & INPUT_DEVICE_CLASS_JOYSTICK) {
+        device->addMapper(new JoystickInputMapper(device));
+    }
+
+    return device;
+}
+
+void InputReader::processEventsForDeviceLocked(int32_t deviceId,
+        const RawEvent* rawEvents, size_t count) {
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex < 0) {
+        ALOGW("Discarding event for unknown deviceId %d.", deviceId);
+        return;
+    }
+
+    InputDevice* device = mDevices.valueAt(deviceIndex);
+    if (device->isIgnored()) {
+        //ALOGD("Discarding event for ignored deviceId %d.", deviceId);
+        return;
+    }
+
+    device->process(rawEvents, count);
+}
+
+void InputReader::timeoutExpiredLocked(nsecs_t when) {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        if (!device->isIgnored()) {
+            device->timeoutExpired(when);
+        }
+    }
+}
+
+void InputReader::handleConfigurationChangedLocked(nsecs_t when) {
+    // Reset global meta state because it depends on the list of all configured devices.
+    updateGlobalMetaStateLocked();
+
+    // Enqueue configuration changed.
+    NotifyConfigurationChangedArgs args(when);
+    mQueuedListener->notifyConfigurationChanged(&args);
+}
+
+void InputReader::refreshConfigurationLocked(uint32_t changes) {
+    mPolicy->getReaderConfiguration(&mConfig);
+    mEventHub->setExcludedDevices(mConfig.excludedDeviceNames);
+
+    if (changes) {
+        ALOGI("Reconfiguring input devices.  changes=0x%08x", changes);
+        nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+
+        if (changes & InputReaderConfiguration::CHANGE_MUST_REOPEN) {
+            mEventHub->requestReopenDevices();
+        } else {
+            for (size_t i = 0; i < mDevices.size(); i++) {
+                InputDevice* device = mDevices.valueAt(i);
+                device->configure(now, &mConfig, changes);
+            }
+        }
+    }
+}
+
+void InputReader::updateGlobalMetaStateLocked() {
+    mGlobalMetaState = 0;
+
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        mGlobalMetaState |= device->getMetaState();
+    }
+}
+
+int32_t InputReader::getGlobalMetaStateLocked() {
+    return mGlobalMetaState;
+}
+
+void InputReader::disableVirtualKeysUntilLocked(nsecs_t time) {
+    mDisableVirtualKeysTimeout = time;
+}
+
+bool InputReader::shouldDropVirtualKeyLocked(nsecs_t now,
+        InputDevice* device, int32_t keyCode, int32_t scanCode) {
+    if (now < mDisableVirtualKeysTimeout) {
+        ALOGI("Dropping virtual key from device %s because virtual keys are "
+                "temporarily disabled for the next %0.3fms.  keyCode=%d, scanCode=%d",
+                device->getName().string(),
+                (mDisableVirtualKeysTimeout - now) * 0.000001,
+                keyCode, scanCode);
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void InputReader::fadePointerLocked() {
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        device->fadePointer();
+    }
+}
+
+void InputReader::requestTimeoutAtTimeLocked(nsecs_t when) {
+    if (when < mNextTimeout) {
+        mNextTimeout = when;
+        mEventHub->wake();
+    }
+}
+
+int32_t InputReader::bumpGenerationLocked() {
+    return ++mGeneration;
+}
+
+void InputReader::getInputDevices(Vector<InputDeviceInfo>& outInputDevices) {
+    AutoMutex _l(mLock);
+    getInputDevicesLocked(outInputDevices);
+}
+
+void InputReader::getInputDevicesLocked(Vector<InputDeviceInfo>& outInputDevices) {
+    outInputDevices.clear();
+
+    size_t numDevices = mDevices.size();
+    for (size_t i = 0; i < numDevices; i++) {
+        InputDevice* device = mDevices.valueAt(i);
+        if (!device->isIgnored()) {
+            outInputDevices.push();
+            device->getDeviceInfo(&outInputDevices.editTop());
+        }
+    }
+}
+
+int32_t InputReader::getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+        int32_t keyCode) {
+    AutoMutex _l(mLock);
+
+    return getStateLocked(deviceId, sourceMask, keyCode, &InputDevice::getKeyCodeState);
+}
+
+int32_t InputReader::getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+        int32_t scanCode) {
+    AutoMutex _l(mLock);
+
+    return getStateLocked(deviceId, sourceMask, scanCode, &InputDevice::getScanCodeState);
+}
+
+int32_t InputReader::getSwitchState(int32_t deviceId, uint32_t sourceMask, int32_t switchCode) {
+    AutoMutex _l(mLock);
+
+    return getStateLocked(deviceId, sourceMask, switchCode, &InputDevice::getSwitchState);
+}
+
+int32_t InputReader::getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code,
+        GetStateFunc getStateFunc) {
+    int32_t result = AKEY_STATE_UNKNOWN;
+    if (deviceId >= 0) {
+        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+        if (deviceIndex >= 0) {
+            InputDevice* device = mDevices.valueAt(deviceIndex);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                result = (device->*getStateFunc)(sourceMask, code);
+            }
+        }
+    } else {
+        size_t numDevices = mDevices.size();
+        for (size_t i = 0; i < numDevices; i++) {
+            InputDevice* device = mDevices.valueAt(i);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                // If any device reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
+                // value.  Otherwise, return AKEY_STATE_UP as long as one device reports it.
+                int32_t currentResult = (device->*getStateFunc)(sourceMask, code);
+                if (currentResult >= AKEY_STATE_DOWN) {
+                    return currentResult;
+                } else if (currentResult == AKEY_STATE_UP) {
+                    result = currentResult;
+                }
+            }
+        }
+    }
+    return result;
+}
+
+bool InputReader::hasKeys(int32_t deviceId, uint32_t sourceMask,
+        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
+    AutoMutex _l(mLock);
+
+    memset(outFlags, 0, numCodes);
+    return markSupportedKeyCodesLocked(deviceId, sourceMask, numCodes, keyCodes, outFlags);
+}
+
+bool InputReader::markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask,
+        size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) {
+    bool result = false;
+    if (deviceId >= 0) {
+        ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+        if (deviceIndex >= 0) {
+            InputDevice* device = mDevices.valueAt(deviceIndex);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                result = device->markSupportedKeyCodes(sourceMask,
+                        numCodes, keyCodes, outFlags);
+            }
+        }
+    } else {
+        size_t numDevices = mDevices.size();
+        for (size_t i = 0; i < numDevices; i++) {
+            InputDevice* device = mDevices.valueAt(i);
+            if (! device->isIgnored() && sourcesMatchMask(device->getSources(), sourceMask)) {
+                result |= device->markSupportedKeyCodes(sourceMask,
+                        numCodes, keyCodes, outFlags);
+            }
+        }
+    }
+    return result;
+}
+
+void InputReader::requestRefreshConfiguration(uint32_t changes) {
+    AutoMutex _l(mLock);
+
+    if (changes) {
+        bool needWake = !mConfigurationChangesToRefresh;
+        mConfigurationChangesToRefresh |= changes;
+
+        if (needWake) {
+            mEventHub->wake();
+        }
+    }
+}
+
+void InputReader::vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize,
+        ssize_t repeat, int32_t token) {
+    AutoMutex _l(mLock);
+
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex >= 0) {
+        InputDevice* device = mDevices.valueAt(deviceIndex);
+        device->vibrate(pattern, patternSize, repeat, token);
+    }
+}
+
+void InputReader::cancelVibrate(int32_t deviceId, int32_t token) {
+    AutoMutex _l(mLock);
+
+    ssize_t deviceIndex = mDevices.indexOfKey(deviceId);
+    if (deviceIndex >= 0) {
+        InputDevice* device = mDevices.valueAt(deviceIndex);
+        device->cancelVibrate(token);
+    }
+}
+
+void InputReader::dump(String8& dump) {
+    AutoMutex _l(mLock);
+
+    mEventHub->dump(dump);
+    dump.append("\n");
+
+    dump.append("Input Reader State:\n");
+
+    for (size_t i = 0; i < mDevices.size(); i++) {
+        mDevices.valueAt(i)->dump(dump);
+    }
+
+    dump.append(INDENT "Configuration:\n");
+    dump.append(INDENT2 "ExcludedDeviceNames: [");
+    for (size_t i = 0; i < mConfig.excludedDeviceNames.size(); i++) {
+        if (i != 0) {
+            dump.append(", ");
+        }
+        dump.append(mConfig.excludedDeviceNames.itemAt(i).string());
+    }
+    dump.append("]\n");
+    dump.appendFormat(INDENT2 "VirtualKeyQuietTime: %0.1fms\n",
+            mConfig.virtualKeyQuietTime * 0.000001f);
+
+    dump.appendFormat(INDENT2 "PointerVelocityControlParameters: "
+            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
+            mConfig.pointerVelocityControlParameters.scale,
+            mConfig.pointerVelocityControlParameters.lowThreshold,
+            mConfig.pointerVelocityControlParameters.highThreshold,
+            mConfig.pointerVelocityControlParameters.acceleration);
+
+    dump.appendFormat(INDENT2 "WheelVelocityControlParameters: "
+            "scale=%0.3f, lowThreshold=%0.3f, highThreshold=%0.3f, acceleration=%0.3f\n",
+            mConfig.wheelVelocityControlParameters.scale,
+            mConfig.wheelVelocityControlParameters.lowThreshold,
+            mConfig.wheelVelocityControlParameters.highThreshold,
+            mConfig.wheelVelocityControlParameters.acceleration);
+
+    dump.appendFormat(INDENT2 "PointerGesture:\n");
+    dump.appendFormat(INDENT3 "Enabled: %s\n",
+            toString(mConfig.pointerGesturesEnabled));
+    dump.appendFormat(INDENT3 "QuietInterval: %0.1fms\n",
+            mConfig.pointerGestureQuietInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "DragMinSwitchSpeed: %0.1fpx/s\n",
+            mConfig.pointerGestureDragMinSwitchSpeed);
+    dump.appendFormat(INDENT3 "TapInterval: %0.1fms\n",
+            mConfig.pointerGestureTapInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "TapDragInterval: %0.1fms\n",
+            mConfig.pointerGestureTapDragInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "TapSlop: %0.1fpx\n",
+            mConfig.pointerGestureTapSlop);
+    dump.appendFormat(INDENT3 "MultitouchSettleInterval: %0.1fms\n",
+            mConfig.pointerGestureMultitouchSettleInterval * 0.000001f);
+    dump.appendFormat(INDENT3 "MultitouchMinDistance: %0.1fpx\n",
+            mConfig.pointerGestureMultitouchMinDistance);
+    dump.appendFormat(INDENT3 "SwipeTransitionAngleCosine: %0.1f\n",
+            mConfig.pointerGestureSwipeTransitionAngleCosine);
+    dump.appendFormat(INDENT3 "SwipeMaxWidthRatio: %0.1f\n",
+            mConfig.pointerGestureSwipeMaxWidthRatio);
+    dump.appendFormat(INDENT3 "MovementSpeedRatio: %0.1f\n",
+            mConfig.pointerGestureMovementSpeedRatio);
+    dump.appendFormat(INDENT3 "ZoomSpeedRatio: %0.1f\n",
+            mConfig.pointerGestureZoomSpeedRatio);
+}
+
+void InputReader::monitor() {
+    // Acquire and release the lock to ensure that the reader has not deadlocked.
+    mLock.lock();
+    mEventHub->wake();
+    mReaderIsAliveCondition.wait(mLock);
+    mLock.unlock();
+
+    // Check the EventHub
+    mEventHub->monitor();
+}
+
+
+// --- InputReader::ContextImpl ---
+
+InputReader::ContextImpl::ContextImpl(InputReader* reader) :
+        mReader(reader) {
+}
+
+void InputReader::ContextImpl::updateGlobalMetaState() {
+    // lock is already held by the input loop
+    mReader->updateGlobalMetaStateLocked();
+}
+
+int32_t InputReader::ContextImpl::getGlobalMetaState() {
+    // lock is already held by the input loop
+    return mReader->getGlobalMetaStateLocked();
+}
+
+void InputReader::ContextImpl::disableVirtualKeysUntil(nsecs_t time) {
+    // lock is already held by the input loop
+    mReader->disableVirtualKeysUntilLocked(time);
+}
+
+bool InputReader::ContextImpl::shouldDropVirtualKey(nsecs_t now,
+        InputDevice* device, int32_t keyCode, int32_t scanCode) {
+    // lock is already held by the input loop
+    return mReader->shouldDropVirtualKeyLocked(now, device, keyCode, scanCode);
+}
+
+void InputReader::ContextImpl::fadePointer() {
+    // lock is already held by the input loop
+    mReader->fadePointerLocked();
+}
+
+void InputReader::ContextImpl::requestTimeoutAtTime(nsecs_t when) {
+    // lock is already held by the input loop
+    mReader->requestTimeoutAtTimeLocked(when);
+}
+
+int32_t InputReader::ContextImpl::bumpGeneration() {
+    // lock is already held by the input loop
+    return mReader->bumpGenerationLocked();
+}
+
+InputReaderPolicyInterface* InputReader::ContextImpl::getPolicy() {
+    return mReader->mPolicy.get();
+}
+
+InputListenerInterface* InputReader::ContextImpl::getListener() {
+    return mReader->mQueuedListener.get();
+}
+
+EventHubInterface* InputReader::ContextImpl::getEventHub() {
+    return mReader->mEventHub.get();
+}
+
+
+// --- InputReaderThread ---
+
+InputReaderThread::InputReaderThread(const sp<InputReaderInterface>& reader) :
+        Thread(/*canCallJava*/ true), mReader(reader) {
+}
+
+InputReaderThread::~InputReaderThread() {
+}
+
+bool InputReaderThread::threadLoop() {
+    mReader->loopOnce();
+    return true;
+}
+
+
+// --- InputDevice ---
+
+InputDevice::InputDevice(InputReaderContext* context, int32_t id, int32_t generation,
+        int32_t controllerNumber, const InputDeviceIdentifier& identifier, uint32_t classes) :
+        mContext(context), mId(id), mGeneration(generation), mControllerNumber(controllerNumber),
+        mIdentifier(identifier), mClasses(classes),
+        mSources(0), mIsExternal(false), mDropUntilNextSync(false) {
+}
+
+InputDevice::~InputDevice() {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        delete mMappers[i];
+    }
+    mMappers.clear();
+}
+
+void InputDevice::dump(String8& dump) {
+    InputDeviceInfo deviceInfo;
+    getDeviceInfo(& deviceInfo);
+
+    dump.appendFormat(INDENT "Device %d: %s\n", deviceInfo.getId(),
+            deviceInfo.getDisplayName().string());
+    dump.appendFormat(INDENT2 "Generation: %d\n", mGeneration);
+    dump.appendFormat(INDENT2 "IsExternal: %s\n", toString(mIsExternal));
+    dump.appendFormat(INDENT2 "Sources: 0x%08x\n", deviceInfo.getSources());
+    dump.appendFormat(INDENT2 "KeyboardType: %d\n", deviceInfo.getKeyboardType());
+
+    const Vector<InputDeviceInfo::MotionRange>& ranges = deviceInfo.getMotionRanges();
+    if (!ranges.isEmpty()) {
+        dump.append(INDENT2 "Motion Ranges:\n");
+        for (size_t i = 0; i < ranges.size(); i++) {
+            const InputDeviceInfo::MotionRange& range = ranges.itemAt(i);
+            const char* label = getAxisLabel(range.axis);
+            char name[32];
+            if (label) {
+                strncpy(name, label, sizeof(name));
+                name[sizeof(name) - 1] = '\0';
+            } else {
+                snprintf(name, sizeof(name), "%d", range.axis);
+            }
+            dump.appendFormat(INDENT3 "%s: source=0x%08x, "
+                    "min=%0.3f, max=%0.3f, flat=%0.3f, fuzz=%0.3f, resolution=%0.3f\n",
+                    name, range.source, range.min, range.max, range.flat, range.fuzz,
+                    range.resolution);
+        }
+    }
+
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->dump(dump);
+    }
+}
+
+void InputDevice::addMapper(InputMapper* mapper) {
+    mMappers.add(mapper);
+}
+
+void InputDevice::configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes) {
+    mSources = 0;
+
+    if (!isIgnored()) {
+        if (!changes) { // first time only
+            mContext->getEventHub()->getConfiguration(mId, &mConfiguration);
+        }
+
+        if (!changes || (changes & InputReaderConfiguration::CHANGE_KEYBOARD_LAYOUTS)) {
+            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
+                sp<KeyCharacterMap> keyboardLayout =
+                        mContext->getPolicy()->getKeyboardLayoutOverlay(mIdentifier);
+                if (mContext->getEventHub()->setKeyboardLayoutOverlay(mId, keyboardLayout)) {
+                    bumpGeneration();
+                }
+            }
+        }
+
+        if (!changes || (changes & InputReaderConfiguration::CHANGE_DEVICE_ALIAS)) {
+            if (!(mClasses & INPUT_DEVICE_CLASS_VIRTUAL)) {
+                String8 alias = mContext->getPolicy()->getDeviceAlias(mIdentifier);
+                if (mAlias != alias) {
+                    mAlias = alias;
+                    bumpGeneration();
+                }
+            }
+        }
+
+        size_t numMappers = mMappers.size();
+        for (size_t i = 0; i < numMappers; i++) {
+            InputMapper* mapper = mMappers[i];
+            mapper->configure(when, config, changes);
+            mSources |= mapper->getSources();
+        }
+    }
+}
+
+void InputDevice::reset(nsecs_t when) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->reset(when);
+    }
+
+    mContext->updateGlobalMetaState();
+
+    notifyReset(when);
+}
+
+void InputDevice::process(const RawEvent* rawEvents, size_t count) {
+    // Process all of the events in order for each mapper.
+    // We cannot simply ask each mapper to process them in bulk because mappers may
+    // have side-effects that must be interleaved.  For example, joystick movement events and
+    // gamepad button presses are handled by different mappers but they should be dispatched
+    // in the order received.
+    size_t numMappers = mMappers.size();
+    for (const RawEvent* rawEvent = rawEvents; count--; rawEvent++) {
+#if DEBUG_RAW_EVENTS
+        ALOGD("Input event: device=%d type=0x%04x code=0x%04x value=0x%08x when=%lld",
+                rawEvent->deviceId, rawEvent->type, rawEvent->code, rawEvent->value,
+                rawEvent->when);
+#endif
+
+        if (mDropUntilNextSync) {
+            if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+                mDropUntilNextSync = false;
+#if DEBUG_RAW_EVENTS
+                ALOGD("Recovered from input event buffer overrun.");
+#endif
+            } else {
+#if DEBUG_RAW_EVENTS
+                ALOGD("Dropped input event while waiting for next input sync.");
+#endif
+            }
+        } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_DROPPED) {
+            ALOGI("Detected input event buffer overrun for device %s.", getName().string());
+            mDropUntilNextSync = true;
+            reset(rawEvent->when);
+        } else {
+            for (size_t i = 0; i < numMappers; i++) {
+                InputMapper* mapper = mMappers[i];
+                mapper->process(rawEvent);
+            }
+        }
+    }
+}
+
+void InputDevice::timeoutExpired(nsecs_t when) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->timeoutExpired(when);
+    }
+}
+
+void InputDevice::getDeviceInfo(InputDeviceInfo* outDeviceInfo) {
+    outDeviceInfo->initialize(mId, mGeneration, mControllerNumber, mIdentifier, mAlias,
+            mIsExternal);
+
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->populateDeviceInfo(outDeviceInfo);
+    }
+}
+
+int32_t InputDevice::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    return getState(sourceMask, keyCode, & InputMapper::getKeyCodeState);
+}
+
+int32_t InputDevice::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    return getState(sourceMask, scanCode, & InputMapper::getScanCodeState);
+}
+
+int32_t InputDevice::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
+    return getState(sourceMask, switchCode, & InputMapper::getSwitchState);
+}
+
+int32_t InputDevice::getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc) {
+    int32_t result = AKEY_STATE_UNKNOWN;
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
+            // If any mapper reports AKEY_STATE_DOWN or AKEY_STATE_VIRTUAL, return that
+            // value.  Otherwise, return AKEY_STATE_UP as long as one mapper reports it.
+            int32_t currentResult = (mapper->*getStateFunc)(sourceMask, code);
+            if (currentResult >= AKEY_STATE_DOWN) {
+                return currentResult;
+            } else if (currentResult == AKEY_STATE_UP) {
+                result = currentResult;
+            }
+        }
+    }
+    return result;
+}
+
+bool InputDevice::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    bool result = false;
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        if (sourcesMatchMask(mapper->getSources(), sourceMask)) {
+            result |= mapper->markSupportedKeyCodes(sourceMask, numCodes, keyCodes, outFlags);
+        }
+    }
+    return result;
+}
+
+void InputDevice::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+        int32_t token) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->vibrate(pattern, patternSize, repeat, token);
+    }
+}
+
+void InputDevice::cancelVibrate(int32_t token) {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->cancelVibrate(token);
+    }
+}
+
+int32_t InputDevice::getMetaState() {
+    int32_t result = 0;
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        result |= mapper->getMetaState();
+    }
+    return result;
+}
+
+void InputDevice::fadePointer() {
+    size_t numMappers = mMappers.size();
+    for (size_t i = 0; i < numMappers; i++) {
+        InputMapper* mapper = mMappers[i];
+        mapper->fadePointer();
+    }
+}
+
+void InputDevice::bumpGeneration() {
+    mGeneration = mContext->bumpGeneration();
+}
+
+void InputDevice::notifyReset(nsecs_t when) {
+    NotifyDeviceResetArgs args(when, mId);
+    mContext->getListener()->notifyDeviceReset(&args);
+}
+
+
+// --- CursorButtonAccumulator ---
+
+CursorButtonAccumulator::CursorButtonAccumulator() {
+    clearButtons();
+}
+
+void CursorButtonAccumulator::reset(InputDevice* device) {
+    mBtnLeft = device->isKeyPressed(BTN_LEFT);
+    mBtnRight = device->isKeyPressed(BTN_RIGHT);
+    mBtnMiddle = device->isKeyPressed(BTN_MIDDLE);
+    mBtnBack = device->isKeyPressed(BTN_BACK);
+    mBtnSide = device->isKeyPressed(BTN_SIDE);
+    mBtnForward = device->isKeyPressed(BTN_FORWARD);
+    mBtnExtra = device->isKeyPressed(BTN_EXTRA);
+    mBtnTask = device->isKeyPressed(BTN_TASK);
+}
+
+void CursorButtonAccumulator::clearButtons() {
+    mBtnLeft = 0;
+    mBtnRight = 0;
+    mBtnMiddle = 0;
+    mBtnBack = 0;
+    mBtnSide = 0;
+    mBtnForward = 0;
+    mBtnExtra = 0;
+    mBtnTask = 0;
+}
+
+void CursorButtonAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_KEY) {
+        switch (rawEvent->code) {
+        case BTN_LEFT:
+            mBtnLeft = rawEvent->value;
+            break;
+        case BTN_RIGHT:
+            mBtnRight = rawEvent->value;
+            break;
+        case BTN_MIDDLE:
+            mBtnMiddle = rawEvent->value;
+            break;
+        case BTN_BACK:
+            mBtnBack = rawEvent->value;
+            break;
+        case BTN_SIDE:
+            mBtnSide = rawEvent->value;
+            break;
+        case BTN_FORWARD:
+            mBtnForward = rawEvent->value;
+            break;
+        case BTN_EXTRA:
+            mBtnExtra = rawEvent->value;
+            break;
+        case BTN_TASK:
+            mBtnTask = rawEvent->value;
+            break;
+        }
+    }
+}
+
+uint32_t CursorButtonAccumulator::getButtonState() const {
+    uint32_t result = 0;
+    if (mBtnLeft) {
+        result |= AMOTION_EVENT_BUTTON_PRIMARY;
+    }
+    if (mBtnRight) {
+        result |= AMOTION_EVENT_BUTTON_SECONDARY;
+    }
+    if (mBtnMiddle) {
+        result |= AMOTION_EVENT_BUTTON_TERTIARY;
+    }
+    if (mBtnBack || mBtnSide) {
+        result |= AMOTION_EVENT_BUTTON_BACK;
+    }
+    if (mBtnForward || mBtnExtra) {
+        result |= AMOTION_EVENT_BUTTON_FORWARD;
+    }
+    return result;
+}
+
+
+// --- CursorMotionAccumulator ---
+
+CursorMotionAccumulator::CursorMotionAccumulator() {
+    clearRelativeAxes();
+}
+
+void CursorMotionAccumulator::reset(InputDevice* device) {
+    clearRelativeAxes();
+}
+
+void CursorMotionAccumulator::clearRelativeAxes() {
+    mRelX = 0;
+    mRelY = 0;
+}
+
+void CursorMotionAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_REL) {
+        switch (rawEvent->code) {
+        case REL_X:
+            mRelX = rawEvent->value;
+            break;
+        case REL_Y:
+            mRelY = rawEvent->value;
+            break;
+        }
+    }
+}
+
+void CursorMotionAccumulator::finishSync() {
+    clearRelativeAxes();
+}
+
+
+// --- CursorScrollAccumulator ---
+
+CursorScrollAccumulator::CursorScrollAccumulator() :
+        mHaveRelWheel(false), mHaveRelHWheel(false) {
+    clearRelativeAxes();
+}
+
+void CursorScrollAccumulator::configure(InputDevice* device) {
+    mHaveRelWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_WHEEL);
+    mHaveRelHWheel = device->getEventHub()->hasRelativeAxis(device->getId(), REL_HWHEEL);
+}
+
+void CursorScrollAccumulator::reset(InputDevice* device) {
+    clearRelativeAxes();
+}
+
+void CursorScrollAccumulator::clearRelativeAxes() {
+    mRelWheel = 0;
+    mRelHWheel = 0;
+}
+
+void CursorScrollAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_REL) {
+        switch (rawEvent->code) {
+        case REL_WHEEL:
+            mRelWheel = rawEvent->value;
+            break;
+        case REL_HWHEEL:
+            mRelHWheel = rawEvent->value;
+            break;
+        }
+    }
+}
+
+void CursorScrollAccumulator::finishSync() {
+    clearRelativeAxes();
+}
+
+
+// --- TouchButtonAccumulator ---
+
+TouchButtonAccumulator::TouchButtonAccumulator() :
+        mHaveBtnTouch(false), mHaveStylus(false) {
+    clearButtons();
+}
+
+void TouchButtonAccumulator::configure(InputDevice* device) {
+    mHaveBtnTouch = device->hasKey(BTN_TOUCH);
+    mHaveStylus = device->hasKey(BTN_TOOL_PEN)
+            || device->hasKey(BTN_TOOL_RUBBER)
+            || device->hasKey(BTN_TOOL_BRUSH)
+            || device->hasKey(BTN_TOOL_PENCIL)
+            || device->hasKey(BTN_TOOL_AIRBRUSH);
+}
+
+void TouchButtonAccumulator::reset(InputDevice* device) {
+    mBtnTouch = device->isKeyPressed(BTN_TOUCH);
+    mBtnStylus = device->isKeyPressed(BTN_STYLUS);
+    mBtnStylus2 = device->isKeyPressed(BTN_STYLUS);
+    mBtnToolFinger = device->isKeyPressed(BTN_TOOL_FINGER);
+    mBtnToolPen = device->isKeyPressed(BTN_TOOL_PEN);
+    mBtnToolRubber = device->isKeyPressed(BTN_TOOL_RUBBER);
+    mBtnToolBrush = device->isKeyPressed(BTN_TOOL_BRUSH);
+    mBtnToolPencil = device->isKeyPressed(BTN_TOOL_PENCIL);
+    mBtnToolAirbrush = device->isKeyPressed(BTN_TOOL_AIRBRUSH);
+    mBtnToolMouse = device->isKeyPressed(BTN_TOOL_MOUSE);
+    mBtnToolLens = device->isKeyPressed(BTN_TOOL_LENS);
+    mBtnToolDoubleTap = device->isKeyPressed(BTN_TOOL_DOUBLETAP);
+    mBtnToolTripleTap = device->isKeyPressed(BTN_TOOL_TRIPLETAP);
+    mBtnToolQuadTap = device->isKeyPressed(BTN_TOOL_QUADTAP);
+}
+
+void TouchButtonAccumulator::clearButtons() {
+    mBtnTouch = 0;
+    mBtnStylus = 0;
+    mBtnStylus2 = 0;
+    mBtnToolFinger = 0;
+    mBtnToolPen = 0;
+    mBtnToolRubber = 0;
+    mBtnToolBrush = 0;
+    mBtnToolPencil = 0;
+    mBtnToolAirbrush = 0;
+    mBtnToolMouse = 0;
+    mBtnToolLens = 0;
+    mBtnToolDoubleTap = 0;
+    mBtnToolTripleTap = 0;
+    mBtnToolQuadTap = 0;
+}
+
+void TouchButtonAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_KEY) {
+        switch (rawEvent->code) {
+        case BTN_TOUCH:
+            mBtnTouch = rawEvent->value;
+            break;
+        case BTN_STYLUS:
+            mBtnStylus = rawEvent->value;
+            break;
+        case BTN_STYLUS2:
+            mBtnStylus2 = rawEvent->value;
+            break;
+        case BTN_TOOL_FINGER:
+            mBtnToolFinger = rawEvent->value;
+            break;
+        case BTN_TOOL_PEN:
+            mBtnToolPen = rawEvent->value;
+            break;
+        case BTN_TOOL_RUBBER:
+            mBtnToolRubber = rawEvent->value;
+            break;
+        case BTN_TOOL_BRUSH:
+            mBtnToolBrush = rawEvent->value;
+            break;
+        case BTN_TOOL_PENCIL:
+            mBtnToolPencil = rawEvent->value;
+            break;
+        case BTN_TOOL_AIRBRUSH:
+            mBtnToolAirbrush = rawEvent->value;
+            break;
+        case BTN_TOOL_MOUSE:
+            mBtnToolMouse = rawEvent->value;
+            break;
+        case BTN_TOOL_LENS:
+            mBtnToolLens = rawEvent->value;
+            break;
+        case BTN_TOOL_DOUBLETAP:
+            mBtnToolDoubleTap = rawEvent->value;
+            break;
+        case BTN_TOOL_TRIPLETAP:
+            mBtnToolTripleTap = rawEvent->value;
+            break;
+        case BTN_TOOL_QUADTAP:
+            mBtnToolQuadTap = rawEvent->value;
+            break;
+        }
+    }
+}
+
+uint32_t TouchButtonAccumulator::getButtonState() const {
+    uint32_t result = 0;
+    if (mBtnStylus) {
+        result |= AMOTION_EVENT_BUTTON_SECONDARY;
+    }
+    if (mBtnStylus2) {
+        result |= AMOTION_EVENT_BUTTON_TERTIARY;
+    }
+    return result;
+}
+
+int32_t TouchButtonAccumulator::getToolType() const {
+    if (mBtnToolMouse || mBtnToolLens) {
+        return AMOTION_EVENT_TOOL_TYPE_MOUSE;
+    }
+    if (mBtnToolRubber) {
+        return AMOTION_EVENT_TOOL_TYPE_ERASER;
+    }
+    if (mBtnToolPen || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush) {
+        return AMOTION_EVENT_TOOL_TYPE_STYLUS;
+    }
+    if (mBtnToolFinger || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap) {
+        return AMOTION_EVENT_TOOL_TYPE_FINGER;
+    }
+    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
+}
+
+bool TouchButtonAccumulator::isToolActive() const {
+    return mBtnTouch || mBtnToolFinger || mBtnToolPen || mBtnToolRubber
+            || mBtnToolBrush || mBtnToolPencil || mBtnToolAirbrush
+            || mBtnToolMouse || mBtnToolLens
+            || mBtnToolDoubleTap || mBtnToolTripleTap || mBtnToolQuadTap;
+}
+
+bool TouchButtonAccumulator::isHovering() const {
+    return mHaveBtnTouch && !mBtnTouch;
+}
+
+bool TouchButtonAccumulator::hasStylus() const {
+    return mHaveStylus;
+}
+
+
+// --- RawPointerAxes ---
+
+RawPointerAxes::RawPointerAxes() {
+    clear();
+}
+
+void RawPointerAxes::clear() {
+    x.clear();
+    y.clear();
+    pressure.clear();
+    touchMajor.clear();
+    touchMinor.clear();
+    toolMajor.clear();
+    toolMinor.clear();
+    orientation.clear();
+    distance.clear();
+    tiltX.clear();
+    tiltY.clear();
+    trackingId.clear();
+    slot.clear();
+}
+
+
+// --- RawPointerData ---
+
+RawPointerData::RawPointerData() {
+    clear();
+}
+
+void RawPointerData::clear() {
+    pointerCount = 0;
+    clearIdBits();
+}
+
+void RawPointerData::copyFrom(const RawPointerData& other) {
+    pointerCount = other.pointerCount;
+    hoveringIdBits = other.hoveringIdBits;
+    touchingIdBits = other.touchingIdBits;
+
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        pointers[i] = other.pointers[i];
+
+        int id = pointers[i].id;
+        idToIndex[id] = other.idToIndex[id];
+    }
+}
+
+void RawPointerData::getCentroidOfTouchingPointers(float* outX, float* outY) const {
+    float x = 0, y = 0;
+    uint32_t count = touchingIdBits.count();
+    if (count) {
+        for (BitSet32 idBits(touchingIdBits); !idBits.isEmpty(); ) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            const Pointer& pointer = pointerForId(id);
+            x += pointer.x;
+            y += pointer.y;
+        }
+        x /= count;
+        y /= count;
+    }
+    *outX = x;
+    *outY = y;
+}
+
+
+// --- CookedPointerData ---
+
+CookedPointerData::CookedPointerData() {
+    clear();
+}
+
+void CookedPointerData::clear() {
+    pointerCount = 0;
+    hoveringIdBits.clear();
+    touchingIdBits.clear();
+}
+
+void CookedPointerData::copyFrom(const CookedPointerData& other) {
+    pointerCount = other.pointerCount;
+    hoveringIdBits = other.hoveringIdBits;
+    touchingIdBits = other.touchingIdBits;
+
+    for (uint32_t i = 0; i < pointerCount; i++) {
+        pointerProperties[i].copyFrom(other.pointerProperties[i]);
+        pointerCoords[i].copyFrom(other.pointerCoords[i]);
+
+        int id = pointerProperties[i].id;
+        idToIndex[id] = other.idToIndex[id];
+    }
+}
+
+
+// --- SingleTouchMotionAccumulator ---
+
+SingleTouchMotionAccumulator::SingleTouchMotionAccumulator() {
+    clearAbsoluteAxes();
+}
+
+void SingleTouchMotionAccumulator::reset(InputDevice* device) {
+    mAbsX = device->getAbsoluteAxisValue(ABS_X);
+    mAbsY = device->getAbsoluteAxisValue(ABS_Y);
+    mAbsPressure = device->getAbsoluteAxisValue(ABS_PRESSURE);
+    mAbsToolWidth = device->getAbsoluteAxisValue(ABS_TOOL_WIDTH);
+    mAbsDistance = device->getAbsoluteAxisValue(ABS_DISTANCE);
+    mAbsTiltX = device->getAbsoluteAxisValue(ABS_TILT_X);
+    mAbsTiltY = device->getAbsoluteAxisValue(ABS_TILT_Y);
+}
+
+void SingleTouchMotionAccumulator::clearAbsoluteAxes() {
+    mAbsX = 0;
+    mAbsY = 0;
+    mAbsPressure = 0;
+    mAbsToolWidth = 0;
+    mAbsDistance = 0;
+    mAbsTiltX = 0;
+    mAbsTiltY = 0;
+}
+
+void SingleTouchMotionAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_ABS) {
+        switch (rawEvent->code) {
+        case ABS_X:
+            mAbsX = rawEvent->value;
+            break;
+        case ABS_Y:
+            mAbsY = rawEvent->value;
+            break;
+        case ABS_PRESSURE:
+            mAbsPressure = rawEvent->value;
+            break;
+        case ABS_TOOL_WIDTH:
+            mAbsToolWidth = rawEvent->value;
+            break;
+        case ABS_DISTANCE:
+            mAbsDistance = rawEvent->value;
+            break;
+        case ABS_TILT_X:
+            mAbsTiltX = rawEvent->value;
+            break;
+        case ABS_TILT_Y:
+            mAbsTiltY = rawEvent->value;
+            break;
+        }
+    }
+}
+
+
+// --- MultiTouchMotionAccumulator ---
+
+MultiTouchMotionAccumulator::MultiTouchMotionAccumulator() :
+        mCurrentSlot(-1), mSlots(NULL), mSlotCount(0), mUsingSlotsProtocol(false),
+        mHaveStylus(false) {
+}
+
+MultiTouchMotionAccumulator::~MultiTouchMotionAccumulator() {
+    delete[] mSlots;
+}
+
+void MultiTouchMotionAccumulator::configure(InputDevice* device,
+        size_t slotCount, bool usingSlotsProtocol) {
+    mSlotCount = slotCount;
+    mUsingSlotsProtocol = usingSlotsProtocol;
+    mHaveStylus = device->hasAbsoluteAxis(ABS_MT_TOOL_TYPE);
+
+    delete[] mSlots;
+    mSlots = new Slot[slotCount];
+}
+
+void MultiTouchMotionAccumulator::reset(InputDevice* device) {
+    // Unfortunately there is no way to read the initial contents of the slots.
+    // So when we reset the accumulator, we must assume they are all zeroes.
+    if (mUsingSlotsProtocol) {
+        // Query the driver for the current slot index and use it as the initial slot
+        // before we start reading events from the device.  It is possible that the
+        // current slot index will not be the same as it was when the first event was
+        // written into the evdev buffer, which means the input mapper could start
+        // out of sync with the initial state of the events in the evdev buffer.
+        // In the extremely unlikely case that this happens, the data from
+        // two slots will be confused until the next ABS_MT_SLOT event is received.
+        // This can cause the touch point to "jump", but at least there will be
+        // no stuck touches.
+        int32_t initialSlot;
+        status_t status = device->getEventHub()->getAbsoluteAxisValue(device->getId(),
+                ABS_MT_SLOT, &initialSlot);
+        if (status) {
+            ALOGD("Could not retrieve current multitouch slot index.  status=%d", status);
+            initialSlot = -1;
+        }
+        clearSlots(initialSlot);
+    } else {
+        clearSlots(-1);
+    }
+}
+
+void MultiTouchMotionAccumulator::clearSlots(int32_t initialSlot) {
+    if (mSlots) {
+        for (size_t i = 0; i < mSlotCount; i++) {
+            mSlots[i].clear();
+        }
+    }
+    mCurrentSlot = initialSlot;
+}
+
+void MultiTouchMotionAccumulator::process(const RawEvent* rawEvent) {
+    if (rawEvent->type == EV_ABS) {
+        bool newSlot = false;
+        if (mUsingSlotsProtocol) {
+            if (rawEvent->code == ABS_MT_SLOT) {
+                mCurrentSlot = rawEvent->value;
+                newSlot = true;
+            }
+        } else if (mCurrentSlot < 0) {
+            mCurrentSlot = 0;
+        }
+
+        if (mCurrentSlot < 0 || size_t(mCurrentSlot) >= mSlotCount) {
+#if DEBUG_POINTERS
+            if (newSlot) {
+                ALOGW("MultiTouch device emitted invalid slot index %d but it "
+                        "should be between 0 and %d; ignoring this slot.",
+                        mCurrentSlot, mSlotCount - 1);
+            }
+#endif
+        } else {
+            Slot* slot = &mSlots[mCurrentSlot];
+
+            switch (rawEvent->code) {
+            case ABS_MT_POSITION_X:
+                slot->mInUse = true;
+                slot->mAbsMTPositionX = rawEvent->value;
+                break;
+            case ABS_MT_POSITION_Y:
+                slot->mInUse = true;
+                slot->mAbsMTPositionY = rawEvent->value;
+                break;
+            case ABS_MT_TOUCH_MAJOR:
+                slot->mInUse = true;
+                slot->mAbsMTTouchMajor = rawEvent->value;
+                break;
+            case ABS_MT_TOUCH_MINOR:
+                slot->mInUse = true;
+                slot->mAbsMTTouchMinor = rawEvent->value;
+                slot->mHaveAbsMTTouchMinor = true;
+                break;
+            case ABS_MT_WIDTH_MAJOR:
+                slot->mInUse = true;
+                slot->mAbsMTWidthMajor = rawEvent->value;
+                break;
+            case ABS_MT_WIDTH_MINOR:
+                slot->mInUse = true;
+                slot->mAbsMTWidthMinor = rawEvent->value;
+                slot->mHaveAbsMTWidthMinor = true;
+                break;
+            case ABS_MT_ORIENTATION:
+                slot->mInUse = true;
+                slot->mAbsMTOrientation = rawEvent->value;
+                break;
+            case ABS_MT_TRACKING_ID:
+                if (mUsingSlotsProtocol && rawEvent->value < 0) {
+                    // The slot is no longer in use but it retains its previous contents,
+                    // which may be reused for subsequent touches.
+                    slot->mInUse = false;
+                } else {
+                    slot->mInUse = true;
+                    slot->mAbsMTTrackingId = rawEvent->value;
+                }
+                break;
+            case ABS_MT_PRESSURE:
+                slot->mInUse = true;
+                slot->mAbsMTPressure = rawEvent->value;
+                break;
+            case ABS_MT_DISTANCE:
+                slot->mInUse = true;
+                slot->mAbsMTDistance = rawEvent->value;
+                break;
+            case ABS_MT_TOOL_TYPE:
+                slot->mInUse = true;
+                slot->mAbsMTToolType = rawEvent->value;
+                slot->mHaveAbsMTToolType = true;
+                break;
+            }
+        }
+    } else if (rawEvent->type == EV_SYN && rawEvent->code == SYN_MT_REPORT) {
+        // MultiTouch Sync: The driver has returned all data for *one* of the pointers.
+        mCurrentSlot += 1;
+    }
+}
+
+void MultiTouchMotionAccumulator::finishSync() {
+    if (!mUsingSlotsProtocol) {
+        clearSlots(-1);
+    }
+}
+
+bool MultiTouchMotionAccumulator::hasStylus() const {
+    return mHaveStylus;
+}
+
+
+// --- MultiTouchMotionAccumulator::Slot ---
+
+MultiTouchMotionAccumulator::Slot::Slot() {
+    clear();
+}
+
+void MultiTouchMotionAccumulator::Slot::clear() {
+    mInUse = false;
+    mHaveAbsMTTouchMinor = false;
+    mHaveAbsMTWidthMinor = false;
+    mHaveAbsMTToolType = false;
+    mAbsMTPositionX = 0;
+    mAbsMTPositionY = 0;
+    mAbsMTTouchMajor = 0;
+    mAbsMTTouchMinor = 0;
+    mAbsMTWidthMajor = 0;
+    mAbsMTWidthMinor = 0;
+    mAbsMTOrientation = 0;
+    mAbsMTTrackingId = -1;
+    mAbsMTPressure = 0;
+    mAbsMTDistance = 0;
+    mAbsMTToolType = 0;
+}
+
+int32_t MultiTouchMotionAccumulator::Slot::getToolType() const {
+    if (mHaveAbsMTToolType) {
+        switch (mAbsMTToolType) {
+        case MT_TOOL_FINGER:
+            return AMOTION_EVENT_TOOL_TYPE_FINGER;
+        case MT_TOOL_PEN:
+            return AMOTION_EVENT_TOOL_TYPE_STYLUS;
+        }
+    }
+    return AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
+}
+
+
+// --- InputMapper ---
+
+InputMapper::InputMapper(InputDevice* device) :
+        mDevice(device), mContext(device->getContext()) {
+}
+
+InputMapper::~InputMapper() {
+}
+
+void InputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    info->addSource(getSources());
+}
+
+void InputMapper::dump(String8& dump) {
+}
+
+void InputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+}
+
+void InputMapper::reset(nsecs_t when) {
+}
+
+void InputMapper::timeoutExpired(nsecs_t when) {
+}
+
+int32_t InputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t InputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t InputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
+    return AKEY_STATE_UNKNOWN;
+}
+
+bool InputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    return false;
+}
+
+void InputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+        int32_t token) {
+}
+
+void InputMapper::cancelVibrate(int32_t token) {
+}
+
+int32_t InputMapper::getMetaState() {
+    return 0;
+}
+
+void InputMapper::fadePointer() {
+}
+
+status_t InputMapper::getAbsoluteAxisInfo(int32_t axis, RawAbsoluteAxisInfo* axisInfo) {
+    return getEventHub()->getAbsoluteAxisInfo(getDeviceId(), axis, axisInfo);
+}
+
+void InputMapper::bumpGeneration() {
+    mDevice->bumpGeneration();
+}
+
+void InputMapper::dumpRawAbsoluteAxisInfo(String8& dump,
+        const RawAbsoluteAxisInfo& axis, const char* name) {
+    if (axis.valid) {
+        dump.appendFormat(INDENT4 "%s: min=%d, max=%d, flat=%d, fuzz=%d, resolution=%d\n",
+                name, axis.minValue, axis.maxValue, axis.flat, axis.fuzz, axis.resolution);
+    } else {
+        dump.appendFormat(INDENT4 "%s: unknown range\n", name);
+    }
+}
+
+
+// --- SwitchInputMapper ---
+
+SwitchInputMapper::SwitchInputMapper(InputDevice* device) :
+        InputMapper(device), mUpdatedSwitchValues(0), mUpdatedSwitchMask(0) {
+}
+
+SwitchInputMapper::~SwitchInputMapper() {
+}
+
+uint32_t SwitchInputMapper::getSources() {
+    return AINPUT_SOURCE_SWITCH;
+}
+
+void SwitchInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_SW:
+        processSwitch(rawEvent->code, rawEvent->value);
+        break;
+
+    case EV_SYN:
+        if (rawEvent->code == SYN_REPORT) {
+            sync(rawEvent->when);
+        }
+    }
+}
+
+void SwitchInputMapper::processSwitch(int32_t switchCode, int32_t switchValue) {
+    if (switchCode >= 0 && switchCode < 32) {
+        if (switchValue) {
+            mUpdatedSwitchValues |= 1 << switchCode;
+        }
+        mUpdatedSwitchMask |= 1 << switchCode;
+    }
+}
+
+void SwitchInputMapper::sync(nsecs_t when) {
+    if (mUpdatedSwitchMask) {
+        NotifySwitchArgs args(when, 0, mUpdatedSwitchValues, mUpdatedSwitchMask);
+        getListener()->notifySwitch(&args);
+
+        mUpdatedSwitchValues = 0;
+        mUpdatedSwitchMask = 0;
+    }
+}
+
+int32_t SwitchInputMapper::getSwitchState(uint32_t sourceMask, int32_t switchCode) {
+    return getEventHub()->getSwitchState(getDeviceId(), switchCode);
+}
+
+
+// --- VibratorInputMapper ---
+
+VibratorInputMapper::VibratorInputMapper(InputDevice* device) :
+        InputMapper(device), mVibrating(false) {
+}
+
+VibratorInputMapper::~VibratorInputMapper() {
+}
+
+uint32_t VibratorInputMapper::getSources() {
+    return 0;
+}
+
+void VibratorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    info->setVibrator(true);
+}
+
+void VibratorInputMapper::process(const RawEvent* rawEvent) {
+    // TODO: Handle FF_STATUS, although it does not seem to be widely supported.
+}
+
+void VibratorInputMapper::vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+        int32_t token) {
+#if DEBUG_VIBRATOR
+    String8 patternStr;
+    for (size_t i = 0; i < patternSize; i++) {
+        if (i != 0) {
+            patternStr.append(", ");
+        }
+        patternStr.appendFormat("%lld", pattern[i]);
+    }
+    ALOGD("vibrate: deviceId=%d, pattern=[%s], repeat=%ld, token=%d",
+            getDeviceId(), patternStr.string(), repeat, token);
+#endif
+
+    mVibrating = true;
+    memcpy(mPattern, pattern, patternSize * sizeof(nsecs_t));
+    mPatternSize = patternSize;
+    mRepeat = repeat;
+    mToken = token;
+    mIndex = -1;
+
+    nextStep();
+}
+
+void VibratorInputMapper::cancelVibrate(int32_t token) {
+#if DEBUG_VIBRATOR
+    ALOGD("cancelVibrate: deviceId=%d, token=%d", getDeviceId(), token);
+#endif
+
+    if (mVibrating && mToken == token) {
+        stopVibrating();
+    }
+}
+
+void VibratorInputMapper::timeoutExpired(nsecs_t when) {
+    if (mVibrating) {
+        if (when >= mNextStepTime) {
+            nextStep();
+        } else {
+            getContext()->requestTimeoutAtTime(mNextStepTime);
+        }
+    }
+}
+
+void VibratorInputMapper::nextStep() {
+    mIndex += 1;
+    if (size_t(mIndex) >= mPatternSize) {
+        if (mRepeat < 0) {
+            // We are done.
+            stopVibrating();
+            return;
+        }
+        mIndex = mRepeat;
+    }
+
+    bool vibratorOn = mIndex & 1;
+    nsecs_t duration = mPattern[mIndex];
+    if (vibratorOn) {
+#if DEBUG_VIBRATOR
+        ALOGD("nextStep: sending vibrate deviceId=%d, duration=%lld",
+                getDeviceId(), duration);
+#endif
+        getEventHub()->vibrate(getDeviceId(), duration);
+    } else {
+#if DEBUG_VIBRATOR
+        ALOGD("nextStep: sending cancel vibrate deviceId=%d", getDeviceId());
+#endif
+        getEventHub()->cancelVibrate(getDeviceId());
+    }
+    nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+    mNextStepTime = now + duration;
+    getContext()->requestTimeoutAtTime(mNextStepTime);
+#if DEBUG_VIBRATOR
+    ALOGD("nextStep: scheduled timeout in %0.3fms", duration * 0.000001f);
+#endif
+}
+
+void VibratorInputMapper::stopVibrating() {
+    mVibrating = false;
+#if DEBUG_VIBRATOR
+    ALOGD("stopVibrating: sending cancel vibrate deviceId=%d", getDeviceId());
+#endif
+    getEventHub()->cancelVibrate(getDeviceId());
+}
+
+void VibratorInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Vibrator Input Mapper:\n");
+    dump.appendFormat(INDENT3 "Vibrating: %s\n", toString(mVibrating));
+}
+
+
+// --- KeyboardInputMapper ---
+
+KeyboardInputMapper::KeyboardInputMapper(InputDevice* device,
+        uint32_t source, int32_t keyboardType) :
+        InputMapper(device), mSource(source),
+        mKeyboardType(keyboardType) {
+}
+
+KeyboardInputMapper::~KeyboardInputMapper() {
+}
+
+uint32_t KeyboardInputMapper::getSources() {
+    return mSource;
+}
+
+void KeyboardInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    info->setKeyboardType(mKeyboardType);
+    info->setKeyCharacterMap(getEventHub()->getKeyCharacterMap(getDeviceId()));
+}
+
+void KeyboardInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Keyboard Input Mapper:\n");
+    dumpParameters(dump);
+    dump.appendFormat(INDENT3 "KeyboardType: %d\n", mKeyboardType);
+    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
+    dump.appendFormat(INDENT3 "KeyDowns: %d keys currently down\n", mKeyDowns.size());
+    dump.appendFormat(INDENT3 "MetaState: 0x%0x\n", mMetaState);
+    dump.appendFormat(INDENT3 "DownTime: %lld\n", mDownTime);
+}
+
+
+void KeyboardInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    if (!changes) { // first time only
+        // Configure basic parameters.
+        configureParameters();
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
+        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
+            DisplayViewport v;
+            if (config->getDisplayInfo(false /*external*/, &v)) {
+                mOrientation = v.orientation;
+            } else {
+                mOrientation = DISPLAY_ORIENTATION_0;
+            }
+        } else {
+            mOrientation = DISPLAY_ORIENTATION_0;
+        }
+    }
+}
+
+void KeyboardInputMapper::configureParameters() {
+    mParameters.orientationAware = false;
+    getDevice()->getConfiguration().tryGetProperty(String8("keyboard.orientationAware"),
+            mParameters.orientationAware);
+
+    mParameters.hasAssociatedDisplay = false;
+    if (mParameters.orientationAware) {
+        mParameters.hasAssociatedDisplay = true;
+    }
+}
+
+void KeyboardInputMapper::dumpParameters(String8& dump) {
+    dump.append(INDENT3 "Parameters:\n");
+    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
+            toString(mParameters.hasAssociatedDisplay));
+    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
+            toString(mParameters.orientationAware));
+}
+
+void KeyboardInputMapper::reset(nsecs_t when) {
+    mMetaState = AMETA_NONE;
+    mDownTime = 0;
+    mKeyDowns.clear();
+    mCurrentHidUsage = 0;
+
+    resetLedState();
+
+    InputMapper::reset(when);
+}
+
+void KeyboardInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_KEY: {
+        int32_t scanCode = rawEvent->code;
+        int32_t usageCode = mCurrentHidUsage;
+        mCurrentHidUsage = 0;
+
+        if (isKeyboardOrGamepadKey(scanCode)) {
+            int32_t keyCode;
+            uint32_t flags;
+            if (getEventHub()->mapKey(getDeviceId(), scanCode, usageCode, &keyCode, &flags)) {
+                keyCode = AKEYCODE_UNKNOWN;
+                flags = 0;
+            }
+            processKey(rawEvent->when, rawEvent->value != 0, keyCode, scanCode, flags);
+        }
+        break;
+    }
+    case EV_MSC: {
+        if (rawEvent->code == MSC_SCAN) {
+            mCurrentHidUsage = rawEvent->value;
+        }
+        break;
+    }
+    case EV_SYN: {
+        if (rawEvent->code == SYN_REPORT) {
+            mCurrentHidUsage = 0;
+        }
+    }
+    }
+}
+
+bool KeyboardInputMapper::isKeyboardOrGamepadKey(int32_t scanCode) {
+    return scanCode < BTN_MOUSE
+        || scanCode >= KEY_OK
+        || (scanCode >= BTN_MISC && scanCode < BTN_MOUSE)
+        || (scanCode >= BTN_JOYSTICK && scanCode < BTN_DIGI);
+}
+
+void KeyboardInputMapper::processKey(nsecs_t when, bool down, int32_t keyCode,
+        int32_t scanCode, uint32_t policyFlags) {
+
+    if (down) {
+        // Rotate key codes according to orientation if needed.
+        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
+            keyCode = rotateKeyCode(keyCode, mOrientation);
+        }
+
+        // Add key down.
+        ssize_t keyDownIndex = findKeyDown(scanCode);
+        if (keyDownIndex >= 0) {
+            // key repeat, be sure to use same keycode as before in case of rotation
+            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
+        } else {
+            // key down
+            if ((policyFlags & POLICY_FLAG_VIRTUAL)
+                    && mContext->shouldDropVirtualKey(when,
+                            getDevice(), keyCode, scanCode)) {
+                return;
+            }
+
+            mKeyDowns.push();
+            KeyDown& keyDown = mKeyDowns.editTop();
+            keyDown.keyCode = keyCode;
+            keyDown.scanCode = scanCode;
+        }
+
+        mDownTime = when;
+    } else {
+        // Remove key down.
+        ssize_t keyDownIndex = findKeyDown(scanCode);
+        if (keyDownIndex >= 0) {
+            // key up, be sure to use same keycode as before in case of rotation
+            keyCode = mKeyDowns.itemAt(keyDownIndex).keyCode;
+            mKeyDowns.removeAt(size_t(keyDownIndex));
+        } else {
+            // key was not actually down
+            ALOGI("Dropping key up from device %s because the key was not down.  "
+                    "keyCode=%d, scanCode=%d",
+                    getDeviceName().string(), keyCode, scanCode);
+            return;
+        }
+    }
+
+    int32_t oldMetaState = mMetaState;
+    int32_t newMetaState = updateMetaState(keyCode, down, oldMetaState);
+    bool metaStateChanged = oldMetaState != newMetaState;
+    if (metaStateChanged) {
+        mMetaState = newMetaState;
+        updateLedState(false);
+    }
+
+    nsecs_t downTime = mDownTime;
+
+    // Key down on external an keyboard should wake the device.
+    // We don't do this for internal keyboards to prevent them from waking up in your pocket.
+    // For internal keyboards, the key layout file should specify the policy flags for
+    // each wake key individually.
+    // TODO: Use the input device configuration to control this behavior more finely.
+    if (down && getDevice()->isExternal()
+            && !(policyFlags & (POLICY_FLAG_WAKE | POLICY_FLAG_WAKE_DROPPED))) {
+        policyFlags |= POLICY_FLAG_WAKE_DROPPED;
+    }
+
+    if (metaStateChanged) {
+        getContext()->updateGlobalMetaState();
+    }
+
+    if (down && !isMetaKey(keyCode)) {
+        getContext()->fadePointer();
+    }
+
+    NotifyKeyArgs args(when, getDeviceId(), mSource, policyFlags,
+            down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
+            AKEY_EVENT_FLAG_FROM_SYSTEM, keyCode, scanCode, newMetaState, downTime);
+    getListener()->notifyKey(&args);
+}
+
+ssize_t KeyboardInputMapper::findKeyDown(int32_t scanCode) {
+    size_t n = mKeyDowns.size();
+    for (size_t i = 0; i < n; i++) {
+        if (mKeyDowns[i].scanCode == scanCode) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+int32_t KeyboardInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    return getEventHub()->getKeyCodeState(getDeviceId(), keyCode);
+}
+
+int32_t KeyboardInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
+}
+
+bool KeyboardInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    return getEventHub()->markSupportedKeyCodes(getDeviceId(), numCodes, keyCodes, outFlags);
+}
+
+int32_t KeyboardInputMapper::getMetaState() {
+    return mMetaState;
+}
+
+void KeyboardInputMapper::resetLedState() {
+    initializeLedState(mCapsLockLedState, ALED_CAPS_LOCK);
+    initializeLedState(mNumLockLedState, ALED_NUM_LOCK);
+    initializeLedState(mScrollLockLedState, ALED_SCROLL_LOCK);
+
+    updateLedState(true);
+}
+
+void KeyboardInputMapper::initializeLedState(LedState& ledState, int32_t led) {
+    ledState.avail = getEventHub()->hasLed(getDeviceId(), led);
+    ledState.on = false;
+}
+
+void KeyboardInputMapper::updateLedState(bool reset) {
+    updateLedStateForModifier(mCapsLockLedState, ALED_CAPS_LOCK,
+            AMETA_CAPS_LOCK_ON, reset);
+    updateLedStateForModifier(mNumLockLedState, ALED_NUM_LOCK,
+            AMETA_NUM_LOCK_ON, reset);
+    updateLedStateForModifier(mScrollLockLedState, ALED_SCROLL_LOCK,
+            AMETA_SCROLL_LOCK_ON, reset);
+}
+
+void KeyboardInputMapper::updateLedStateForModifier(LedState& ledState,
+        int32_t led, int32_t modifier, bool reset) {
+    if (ledState.avail) {
+        bool desiredState = (mMetaState & modifier) != 0;
+        if (reset || ledState.on != desiredState) {
+            getEventHub()->setLedState(getDeviceId(), led, desiredState);
+            ledState.on = desiredState;
+        }
+    }
+}
+
+
+// --- CursorInputMapper ---
+
+CursorInputMapper::CursorInputMapper(InputDevice* device) :
+        InputMapper(device) {
+}
+
+CursorInputMapper::~CursorInputMapper() {
+}
+
+uint32_t CursorInputMapper::getSources() {
+    return mSource;
+}
+
+void CursorInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    if (mParameters.mode == Parameters::MODE_POINTER) {
+        float minX, minY, maxX, maxY;
+        if (mPointerController->getBounds(&minX, &minY, &maxX, &maxY)) {
+            info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, minX, maxX, 0.0f, 0.0f, 0.0f);
+            info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, minY, maxY, 0.0f, 0.0f, 0.0f);
+        }
+    } else {
+        info->addMotionRange(AMOTION_EVENT_AXIS_X, mSource, -1.0f, 1.0f, 0.0f, mXScale, 0.0f);
+        info->addMotionRange(AMOTION_EVENT_AXIS_Y, mSource, -1.0f, 1.0f, 0.0f, mYScale, 0.0f);
+    }
+    info->addMotionRange(AMOTION_EVENT_AXIS_PRESSURE, mSource, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
+
+    if (mCursorScrollAccumulator.haveRelativeVWheel()) {
+        info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
+    }
+    if (mCursorScrollAccumulator.haveRelativeHWheel()) {
+        info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
+    }
+}
+
+void CursorInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Cursor Input Mapper:\n");
+    dumpParameters(dump);
+    dump.appendFormat(INDENT3 "XScale: %0.3f\n", mXScale);
+    dump.appendFormat(INDENT3 "YScale: %0.3f\n", mYScale);
+    dump.appendFormat(INDENT3 "XPrecision: %0.3f\n", mXPrecision);
+    dump.appendFormat(INDENT3 "YPrecision: %0.3f\n", mYPrecision);
+    dump.appendFormat(INDENT3 "HaveVWheel: %s\n",
+            toString(mCursorScrollAccumulator.haveRelativeVWheel()));
+    dump.appendFormat(INDENT3 "HaveHWheel: %s\n",
+            toString(mCursorScrollAccumulator.haveRelativeHWheel()));
+    dump.appendFormat(INDENT3 "VWheelScale: %0.3f\n", mVWheelScale);
+    dump.appendFormat(INDENT3 "HWheelScale: %0.3f\n", mHWheelScale);
+    dump.appendFormat(INDENT3 "Orientation: %d\n", mOrientation);
+    dump.appendFormat(INDENT3 "ButtonState: 0x%08x\n", mButtonState);
+    dump.appendFormat(INDENT3 "Down: %s\n", toString(isPointerDown(mButtonState)));
+    dump.appendFormat(INDENT3 "DownTime: %lld\n", mDownTime);
+}
+
+void CursorInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    if (!changes) { // first time only
+        mCursorScrollAccumulator.configure(getDevice());
+
+        // Configure basic parameters.
+        configureParameters();
+
+        // Configure device mode.
+        switch (mParameters.mode) {
+        case Parameters::MODE_POINTER:
+            mSource = AINPUT_SOURCE_MOUSE;
+            mXPrecision = 1.0f;
+            mYPrecision = 1.0f;
+            mXScale = 1.0f;
+            mYScale = 1.0f;
+            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
+            break;
+        case Parameters::MODE_NAVIGATION:
+            mSource = AINPUT_SOURCE_TRACKBALL;
+            mXPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
+            mYPrecision = TRACKBALL_MOVEMENT_THRESHOLD;
+            mXScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
+            mYScale = 1.0f / TRACKBALL_MOVEMENT_THRESHOLD;
+            break;
+        }
+
+        mVWheelScale = 1.0f;
+        mHWheelScale = 1.0f;
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
+        mPointerVelocityControl.setParameters(config->pointerVelocityControlParameters);
+        mWheelXVelocityControl.setParameters(config->wheelVelocityControlParameters);
+        mWheelYVelocityControl.setParameters(config->wheelVelocityControlParameters);
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
+        if (mParameters.orientationAware && mParameters.hasAssociatedDisplay) {
+            DisplayViewport v;
+            if (config->getDisplayInfo(false /*external*/, &v)) {
+                mOrientation = v.orientation;
+            } else {
+                mOrientation = DISPLAY_ORIENTATION_0;
+            }
+        } else {
+            mOrientation = DISPLAY_ORIENTATION_0;
+        }
+        bumpGeneration();
+    }
+}
+
+void CursorInputMapper::configureParameters() {
+    mParameters.mode = Parameters::MODE_POINTER;
+    String8 cursorModeString;
+    if (getDevice()->getConfiguration().tryGetProperty(String8("cursor.mode"), cursorModeString)) {
+        if (cursorModeString == "navigation") {
+            mParameters.mode = Parameters::MODE_NAVIGATION;
+        } else if (cursorModeString != "pointer" && cursorModeString != "default") {
+            ALOGW("Invalid value for cursor.mode: '%s'", cursorModeString.string());
+        }
+    }
+
+    mParameters.orientationAware = false;
+    getDevice()->getConfiguration().tryGetProperty(String8("cursor.orientationAware"),
+            mParameters.orientationAware);
+
+    mParameters.hasAssociatedDisplay = false;
+    if (mParameters.mode == Parameters::MODE_POINTER || mParameters.orientationAware) {
+        mParameters.hasAssociatedDisplay = true;
+    }
+}
+
+void CursorInputMapper::dumpParameters(String8& dump) {
+    dump.append(INDENT3 "Parameters:\n");
+    dump.appendFormat(INDENT4 "HasAssociatedDisplay: %s\n",
+            toString(mParameters.hasAssociatedDisplay));
+
+    switch (mParameters.mode) {
+    case Parameters::MODE_POINTER:
+        dump.append(INDENT4 "Mode: pointer\n");
+        break;
+    case Parameters::MODE_NAVIGATION:
+        dump.append(INDENT4 "Mode: navigation\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
+            toString(mParameters.orientationAware));
+}
+
+void CursorInputMapper::reset(nsecs_t when) {
+    mButtonState = 0;
+    mDownTime = 0;
+
+    mPointerVelocityControl.reset();
+    mWheelXVelocityControl.reset();
+    mWheelYVelocityControl.reset();
+
+    mCursorButtonAccumulator.reset(getDevice());
+    mCursorMotionAccumulator.reset(getDevice());
+    mCursorScrollAccumulator.reset(getDevice());
+
+    InputMapper::reset(when);
+}
+
+void CursorInputMapper::process(const RawEvent* rawEvent) {
+    mCursorButtonAccumulator.process(rawEvent);
+    mCursorMotionAccumulator.process(rawEvent);
+    mCursorScrollAccumulator.process(rawEvent);
+
+    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+        sync(rawEvent->when);
+    }
+}
+
+void CursorInputMapper::sync(nsecs_t when) {
+    int32_t lastButtonState = mButtonState;
+    int32_t currentButtonState = mCursorButtonAccumulator.getButtonState();
+    mButtonState = currentButtonState;
+
+    bool wasDown = isPointerDown(lastButtonState);
+    bool down = isPointerDown(currentButtonState);
+    bool downChanged;
+    if (!wasDown && down) {
+        mDownTime = when;
+        downChanged = true;
+    } else if (wasDown && !down) {
+        downChanged = true;
+    } else {
+        downChanged = false;
+    }
+    nsecs_t downTime = mDownTime;
+    bool buttonsChanged = currentButtonState != lastButtonState;
+    bool buttonsPressed = currentButtonState & ~lastButtonState;
+
+    float deltaX = mCursorMotionAccumulator.getRelativeX() * mXScale;
+    float deltaY = mCursorMotionAccumulator.getRelativeY() * mYScale;
+    bool moved = deltaX != 0 || deltaY != 0;
+
+    // Rotate delta according to orientation if needed.
+    if (mParameters.orientationAware && mParameters.hasAssociatedDisplay
+            && (deltaX != 0.0f || deltaY != 0.0f)) {
+        rotateDelta(mOrientation, &deltaX, &deltaY);
+    }
+
+    // Move the pointer.
+    PointerProperties pointerProperties;
+    pointerProperties.clear();
+    pointerProperties.id = 0;
+    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_MOUSE;
+
+    PointerCoords pointerCoords;
+    pointerCoords.clear();
+
+    float vscroll = mCursorScrollAccumulator.getRelativeVWheel();
+    float hscroll = mCursorScrollAccumulator.getRelativeHWheel();
+    bool scrolled = vscroll != 0 || hscroll != 0;
+
+    mWheelYVelocityControl.move(when, NULL, &vscroll);
+    mWheelXVelocityControl.move(when, &hscroll, NULL);
+
+    mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+    int32_t displayId;
+    if (mPointerController != NULL) {
+        if (moved || scrolled || buttonsChanged) {
+            mPointerController->setPresentation(
+                    PointerControllerInterface::PRESENTATION_POINTER);
+
+            if (moved) {
+                mPointerController->move(deltaX, deltaY);
+            }
+
+            if (buttonsChanged) {
+                mPointerController->setButtonState(currentButtonState);
+            }
+
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        }
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        displayId = ADISPLAY_ID_DEFAULT;
+    } else {
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, deltaX);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, deltaY);
+        displayId = ADISPLAY_ID_NONE;
+    }
+
+    pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, down ? 1.0f : 0.0f);
+
+    // Moving an external trackball or mouse should wake the device.
+    // We don't do this for internal cursor devices to prevent them from waking up
+    // the device in your pocket.
+    // TODO: Use the input device configuration to control this behavior more finely.
+    uint32_t policyFlags = 0;
+    if ((buttonsPressed || moved || scrolled) && getDevice()->isExternal()) {
+        policyFlags |= POLICY_FLAG_WAKE_DROPPED;
+    }
+
+    // Synthesize key down from buttons if needed.
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
+            policyFlags, lastButtonState, currentButtonState);
+
+    // Send motion event.
+    if (downChanged || moved || scrolled || buttonsChanged) {
+        int32_t metaState = mContext->getGlobalMetaState();
+        int32_t motionEventAction;
+        if (downChanged) {
+            motionEventAction = down ? AMOTION_EVENT_ACTION_DOWN : AMOTION_EVENT_ACTION_UP;
+        } else if (down || mPointerController == NULL) {
+            motionEventAction = AMOTION_EVENT_ACTION_MOVE;
+        } else {
+            motionEventAction = AMOTION_EVENT_ACTION_HOVER_MOVE;
+        }
+
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                motionEventAction, 0, metaState, currentButtonState, 0,
+                displayId, 1, &pointerProperties, &pointerCoords,
+                mXPrecision, mYPrecision, downTime);
+        getListener()->notifyMotion(&args);
+
+        // Send hover move after UP to tell the application that the mouse is hovering now.
+        if (motionEventAction == AMOTION_EVENT_ACTION_UP
+                && mPointerController != NULL) {
+            NotifyMotionArgs hoverArgs(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                    metaState, currentButtonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                    displayId, 1, &pointerProperties, &pointerCoords,
+                    mXPrecision, mYPrecision, downTime);
+            getListener()->notifyMotion(&hoverArgs);
+        }
+
+        // Send scroll events.
+        if (scrolled) {
+            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
+            pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
+
+            NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_SCROLL, 0, metaState, currentButtonState,
+                    AMOTION_EVENT_EDGE_FLAG_NONE,
+                    displayId, 1, &pointerProperties, &pointerCoords,
+                    mXPrecision, mYPrecision, downTime);
+            getListener()->notifyMotion(&scrollArgs);
+        }
+    }
+
+    // Synthesize key up from buttons if needed.
+    synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
+            policyFlags, lastButtonState, currentButtonState);
+
+    mCursorMotionAccumulator.finishSync();
+    mCursorScrollAccumulator.finishSync();
+}
+
+int32_t CursorInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    if (scanCode >= BTN_MOUSE && scanCode < BTN_JOYSTICK) {
+        return getEventHub()->getScanCodeState(getDeviceId(), scanCode);
+    } else {
+        return AKEY_STATE_UNKNOWN;
+    }
+}
+
+void CursorInputMapper::fadePointer() {
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+    }
+}
+
+
+// --- TouchInputMapper ---
+
+TouchInputMapper::TouchInputMapper(InputDevice* device) :
+        InputMapper(device),
+        mSource(0), mDeviceMode(DEVICE_MODE_DISABLED),
+        mSurfaceWidth(-1), mSurfaceHeight(-1), mSurfaceLeft(0), mSurfaceTop(0),
+        mSurfaceOrientation(DISPLAY_ORIENTATION_0) {
+}
+
+TouchInputMapper::~TouchInputMapper() {
+}
+
+uint32_t TouchInputMapper::getSources() {
+    return mSource;
+}
+
+void TouchInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    if (mDeviceMode != DEVICE_MODE_DISABLED) {
+        info->addMotionRange(mOrientedRanges.x);
+        info->addMotionRange(mOrientedRanges.y);
+        info->addMotionRange(mOrientedRanges.pressure);
+
+        if (mOrientedRanges.haveSize) {
+            info->addMotionRange(mOrientedRanges.size);
+        }
+
+        if (mOrientedRanges.haveTouchSize) {
+            info->addMotionRange(mOrientedRanges.touchMajor);
+            info->addMotionRange(mOrientedRanges.touchMinor);
+        }
+
+        if (mOrientedRanges.haveToolSize) {
+            info->addMotionRange(mOrientedRanges.toolMajor);
+            info->addMotionRange(mOrientedRanges.toolMinor);
+        }
+
+        if (mOrientedRanges.haveOrientation) {
+            info->addMotionRange(mOrientedRanges.orientation);
+        }
+
+        if (mOrientedRanges.haveDistance) {
+            info->addMotionRange(mOrientedRanges.distance);
+        }
+
+        if (mOrientedRanges.haveTilt) {
+            info->addMotionRange(mOrientedRanges.tilt);
+        }
+
+        if (mCursorScrollAccumulator.haveRelativeVWheel()) {
+            info->addMotionRange(AMOTION_EVENT_AXIS_VSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
+                    0.0f);
+        }
+        if (mCursorScrollAccumulator.haveRelativeHWheel()) {
+            info->addMotionRange(AMOTION_EVENT_AXIS_HSCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
+                    0.0f);
+        }
+        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
+            const InputDeviceInfo::MotionRange& x = mOrientedRanges.x;
+            const InputDeviceInfo::MotionRange& y = mOrientedRanges.y;
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_1, mSource, x.min, x.max, x.flat,
+                    x.fuzz, x.resolution);
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_2, mSource, y.min, y.max, y.flat,
+                    y.fuzz, y.resolution);
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_3, mSource, x.min, x.max, x.flat,
+                    x.fuzz, x.resolution);
+            info->addMotionRange(AMOTION_EVENT_AXIS_GENERIC_4, mSource, y.min, y.max, y.flat,
+                    y.fuzz, y.resolution);
+        }
+        info->setButtonUnderPad(mParameters.hasButtonUnderPad);
+    }
+}
+
+void TouchInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Touch Input Mapper:\n");
+    dumpParameters(dump);
+    dumpVirtualKeys(dump);
+    dumpRawPointerAxes(dump);
+    dumpCalibration(dump);
+    dumpSurface(dump);
+
+    dump.appendFormat(INDENT3 "Translation and Scaling Factors:\n");
+    dump.appendFormat(INDENT4 "XTranslate: %0.3f\n", mXTranslate);
+    dump.appendFormat(INDENT4 "YTranslate: %0.3f\n", mYTranslate);
+    dump.appendFormat(INDENT4 "XScale: %0.3f\n", mXScale);
+    dump.appendFormat(INDENT4 "YScale: %0.3f\n", mYScale);
+    dump.appendFormat(INDENT4 "XPrecision: %0.3f\n", mXPrecision);
+    dump.appendFormat(INDENT4 "YPrecision: %0.3f\n", mYPrecision);
+    dump.appendFormat(INDENT4 "GeometricScale: %0.3f\n", mGeometricScale);
+    dump.appendFormat(INDENT4 "PressureScale: %0.3f\n", mPressureScale);
+    dump.appendFormat(INDENT4 "SizeScale: %0.3f\n", mSizeScale);
+    dump.appendFormat(INDENT4 "OrientationScale: %0.3f\n", mOrientationScale);
+    dump.appendFormat(INDENT4 "DistanceScale: %0.3f\n", mDistanceScale);
+    dump.appendFormat(INDENT4 "HaveTilt: %s\n", toString(mHaveTilt));
+    dump.appendFormat(INDENT4 "TiltXCenter: %0.3f\n", mTiltXCenter);
+    dump.appendFormat(INDENT4 "TiltXScale: %0.3f\n", mTiltXScale);
+    dump.appendFormat(INDENT4 "TiltYCenter: %0.3f\n", mTiltYCenter);
+    dump.appendFormat(INDENT4 "TiltYScale: %0.3f\n", mTiltYScale);
+
+    dump.appendFormat(INDENT3 "Last Button State: 0x%08x\n", mLastButtonState);
+
+    dump.appendFormat(INDENT3 "Last Raw Touch: pointerCount=%d\n",
+            mLastRawPointerData.pointerCount);
+    for (uint32_t i = 0; i < mLastRawPointerData.pointerCount; i++) {
+        const RawPointerData::Pointer& pointer = mLastRawPointerData.pointers[i];
+        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%d, y=%d, pressure=%d, "
+                "touchMajor=%d, touchMinor=%d, toolMajor=%d, toolMinor=%d, "
+                "orientation=%d, tiltX=%d, tiltY=%d, distance=%d, "
+                "toolType=%d, isHovering=%s\n", i,
+                pointer.id, pointer.x, pointer.y, pointer.pressure,
+                pointer.touchMajor, pointer.touchMinor,
+                pointer.toolMajor, pointer.toolMinor,
+                pointer.orientation, pointer.tiltX, pointer.tiltY, pointer.distance,
+                pointer.toolType, toString(pointer.isHovering));
+    }
+
+    dump.appendFormat(INDENT3 "Last Cooked Touch: pointerCount=%d\n",
+            mLastCookedPointerData.pointerCount);
+    for (uint32_t i = 0; i < mLastCookedPointerData.pointerCount; i++) {
+        const PointerProperties& pointerProperties = mLastCookedPointerData.pointerProperties[i];
+        const PointerCoords& pointerCoords = mLastCookedPointerData.pointerCoords[i];
+        dump.appendFormat(INDENT4 "[%d]: id=%d, x=%0.3f, y=%0.3f, pressure=%0.3f, "
+                "touchMajor=%0.3f, touchMinor=%0.3f, toolMajor=%0.3f, toolMinor=%0.3f, "
+                "orientation=%0.3f, tilt=%0.3f, distance=%0.3f, "
+                "toolType=%d, isHovering=%s\n", i,
+                pointerProperties.id,
+                pointerCoords.getX(),
+                pointerCoords.getY(),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_TILT),
+                pointerCoords.getAxisValue(AMOTION_EVENT_AXIS_DISTANCE),
+                pointerProperties.toolType,
+                toString(mLastCookedPointerData.isHovering(i)));
+    }
+
+    if (mDeviceMode == DEVICE_MODE_POINTER) {
+        dump.appendFormat(INDENT3 "Pointer Gesture Detector:\n");
+        dump.appendFormat(INDENT4 "XMovementScale: %0.3f\n",
+                mPointerXMovementScale);
+        dump.appendFormat(INDENT4 "YMovementScale: %0.3f\n",
+                mPointerYMovementScale);
+        dump.appendFormat(INDENT4 "XZoomScale: %0.3f\n",
+                mPointerXZoomScale);
+        dump.appendFormat(INDENT4 "YZoomScale: %0.3f\n",
+                mPointerYZoomScale);
+        dump.appendFormat(INDENT4 "MaxSwipeWidth: %f\n",
+                mPointerGestureMaxSwipeWidth);
+    }
+}
+
+void TouchInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    mConfig = *config;
+
+    if (!changes) { // first time only
+        // Configure basic parameters.
+        configureParameters();
+
+        // Configure common accumulators.
+        mCursorScrollAccumulator.configure(getDevice());
+        mTouchButtonAccumulator.configure(getDevice());
+
+        // Configure absolute axis information.
+        configureRawPointerAxes();
+
+        // Prepare input device calibration.
+        parseCalibration();
+        resolveCalibration();
+    }
+
+    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {
+        // Update pointer speed.
+        mPointerVelocityControl.setParameters(mConfig.pointerVelocityControlParameters);
+        mWheelXVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
+        mWheelYVelocityControl.setParameters(mConfig.wheelVelocityControlParameters);
+    }
+
+    bool resetNeeded = false;
+    if (!changes || (changes & (InputReaderConfiguration::CHANGE_DISPLAY_INFO
+            | InputReaderConfiguration::CHANGE_POINTER_GESTURE_ENABLEMENT
+            | InputReaderConfiguration::CHANGE_SHOW_TOUCHES))) {
+        // Configure device sources, surface dimensions, orientation and
+        // scaling factors.
+        configureSurface(when, &resetNeeded);
+    }
+
+    if (changes && resetNeeded) {
+        // Send reset, unless this is the first time the device has been configured,
+        // in which case the reader will call reset itself after all mappers are ready.
+        getDevice()->notifyReset(when);
+    }
+}
+
+void TouchInputMapper::configureParameters() {
+    // Use the pointer presentation mode for devices that do not support distinct
+    // multitouch.  The spot-based presentation relies on being able to accurately
+    // locate two or more fingers on the touch pad.
+    mParameters.gestureMode = getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_SEMI_MT)
+            ? Parameters::GESTURE_MODE_POINTER : Parameters::GESTURE_MODE_SPOTS;
+
+    String8 gestureModeString;
+    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.gestureMode"),
+            gestureModeString)) {
+        if (gestureModeString == "pointer") {
+            mParameters.gestureMode = Parameters::GESTURE_MODE_POINTER;
+        } else if (gestureModeString == "spots") {
+            mParameters.gestureMode = Parameters::GESTURE_MODE_SPOTS;
+        } else if (gestureModeString != "default") {
+            ALOGW("Invalid value for touch.gestureMode: '%s'", gestureModeString.string());
+        }
+    }
+
+    if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_DIRECT)) {
+        // The device is a touch screen.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
+    } else if (getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_POINTER)) {
+        // The device is a pointing device like a track pad.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
+    } else if (getEventHub()->hasRelativeAxis(getDeviceId(), REL_X)
+            || getEventHub()->hasRelativeAxis(getDeviceId(), REL_Y)) {
+        // The device is a cursor device with a touch pad attached.
+        // By default don't use the touch pad to move the pointer.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
+    } else {
+        // The device is a touch pad of unknown purpose.
+        mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
+    }
+
+    mParameters.hasButtonUnderPad=
+            getEventHub()->hasInputProperty(getDeviceId(), INPUT_PROP_BUTTONPAD);
+
+    String8 deviceTypeString;
+    if (getDevice()->getConfiguration().tryGetProperty(String8("touch.deviceType"),
+            deviceTypeString)) {
+        if (deviceTypeString == "touchScreen") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_SCREEN;
+        } else if (deviceTypeString == "touchPad") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_PAD;
+        } else if (deviceTypeString == "touchNavigation") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_TOUCH_NAVIGATION;
+        } else if (deviceTypeString == "pointer") {
+            mParameters.deviceType = Parameters::DEVICE_TYPE_POINTER;
+        } else if (deviceTypeString != "default") {
+            ALOGW("Invalid value for touch.deviceType: '%s'", deviceTypeString.string());
+        }
+    }
+
+    mParameters.orientationAware = mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN;
+    getDevice()->getConfiguration().tryGetProperty(String8("touch.orientationAware"),
+            mParameters.orientationAware);
+
+    mParameters.hasAssociatedDisplay = false;
+    mParameters.associatedDisplayIsExternal = false;
+    if (mParameters.orientationAware
+            || mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
+            || mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER) {
+        mParameters.hasAssociatedDisplay = true;
+        mParameters.associatedDisplayIsExternal =
+                mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
+                        && getDevice()->isExternal();
+    }
+}
+
+void TouchInputMapper::dumpParameters(String8& dump) {
+    dump.append(INDENT3 "Parameters:\n");
+
+    switch (mParameters.gestureMode) {
+    case Parameters::GESTURE_MODE_POINTER:
+        dump.append(INDENT4 "GestureMode: pointer\n");
+        break;
+    case Parameters::GESTURE_MODE_SPOTS:
+        dump.append(INDENT4 "GestureMode: spots\n");
+        break;
+    default:
+        assert(false);
+    }
+
+    switch (mParameters.deviceType) {
+    case Parameters::DEVICE_TYPE_TOUCH_SCREEN:
+        dump.append(INDENT4 "DeviceType: touchScreen\n");
+        break;
+    case Parameters::DEVICE_TYPE_TOUCH_PAD:
+        dump.append(INDENT4 "DeviceType: touchPad\n");
+        break;
+    case Parameters::DEVICE_TYPE_TOUCH_NAVIGATION:
+        dump.append(INDENT4 "DeviceType: touchNavigation\n");
+        break;
+    case Parameters::DEVICE_TYPE_POINTER:
+        dump.append(INDENT4 "DeviceType: pointer\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    dump.appendFormat(INDENT4 "AssociatedDisplay: hasAssociatedDisplay=%s, isExternal=%s\n",
+            toString(mParameters.hasAssociatedDisplay),
+            toString(mParameters.associatedDisplayIsExternal));
+    dump.appendFormat(INDENT4 "OrientationAware: %s\n",
+            toString(mParameters.orientationAware));
+}
+
+void TouchInputMapper::configureRawPointerAxes() {
+    mRawPointerAxes.clear();
+}
+
+void TouchInputMapper::dumpRawPointerAxes(String8& dump) {
+    dump.append(INDENT3 "Raw Touch Axes:\n");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.x, "X");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.y, "Y");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.pressure, "Pressure");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMajor, "TouchMajor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.touchMinor, "TouchMinor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMajor, "ToolMajor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.toolMinor, "ToolMinor");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.orientation, "Orientation");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.distance, "Distance");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltX, "TiltX");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.tiltY, "TiltY");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.trackingId, "TrackingId");
+    dumpRawAbsoluteAxisInfo(dump, mRawPointerAxes.slot, "Slot");
+}
+
+void TouchInputMapper::configureSurface(nsecs_t when, bool* outResetNeeded) {
+    int32_t oldDeviceMode = mDeviceMode;
+
+    // Determine device mode.
+    if (mParameters.deviceType == Parameters::DEVICE_TYPE_POINTER
+            && mConfig.pointerGesturesEnabled) {
+        mSource = AINPUT_SOURCE_MOUSE;
+        mDeviceMode = DEVICE_MODE_POINTER;
+        if (hasStylus()) {
+            mSource |= AINPUT_SOURCE_STYLUS;
+        }
+    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_SCREEN
+            && mParameters.hasAssociatedDisplay) {
+        mSource = AINPUT_SOURCE_TOUCHSCREEN;
+        mDeviceMode = DEVICE_MODE_DIRECT;
+        if (hasStylus()) {
+            mSource |= AINPUT_SOURCE_STYLUS;
+        }
+    } else if (mParameters.deviceType == Parameters::DEVICE_TYPE_TOUCH_NAVIGATION) {
+        mSource = AINPUT_SOURCE_TOUCH_NAVIGATION;
+        mDeviceMode = DEVICE_MODE_NAVIGATION;
+    } else {
+        mSource = AINPUT_SOURCE_TOUCHPAD;
+        mDeviceMode = DEVICE_MODE_UNSCALED;
+    }
+
+    // Ensure we have valid X and Y axes.
+    if (!mRawPointerAxes.x.valid || !mRawPointerAxes.y.valid) {
+        ALOGW(INDENT "Touch device '%s' did not report support for X or Y axis!  "
+                "The device will be inoperable.", getDeviceName().string());
+        mDeviceMode = DEVICE_MODE_DISABLED;
+        return;
+    }
+
+    // Raw width and height in the natural orientation.
+    int32_t rawWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
+    int32_t rawHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
+
+    // Get associated display dimensions.
+    DisplayViewport newViewport;
+    if (mParameters.hasAssociatedDisplay) {
+        if (!mConfig.getDisplayInfo(mParameters.associatedDisplayIsExternal, &newViewport)) {
+            ALOGI(INDENT "Touch device '%s' could not query the properties of its associated "
+                    "display.  The device will be inoperable until the display size "
+                    "becomes available.",
+                    getDeviceName().string());
+            mDeviceMode = DEVICE_MODE_DISABLED;
+            return;
+        }
+    } else {
+        newViewport.setNonDisplayViewport(rawWidth, rawHeight);
+    }
+    bool viewportChanged = mViewport != newViewport;
+    if (viewportChanged) {
+        mViewport = newViewport;
+
+        if (mDeviceMode == DEVICE_MODE_DIRECT || mDeviceMode == DEVICE_MODE_POINTER) {
+            // Convert rotated viewport to natural surface coordinates.
+            int32_t naturalLogicalWidth, naturalLogicalHeight;
+            int32_t naturalPhysicalWidth, naturalPhysicalHeight;
+            int32_t naturalPhysicalLeft, naturalPhysicalTop;
+            int32_t naturalDeviceWidth, naturalDeviceHeight;
+            switch (mViewport.orientation) {
+            case DISPLAY_ORIENTATION_90:
+                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalLeft = mViewport.deviceHeight - mViewport.physicalBottom;
+                naturalPhysicalTop = mViewport.physicalLeft;
+                naturalDeviceWidth = mViewport.deviceHeight;
+                naturalDeviceHeight = mViewport.deviceWidth;
+                break;
+            case DISPLAY_ORIENTATION_180:
+                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalLeft = mViewport.deviceWidth - mViewport.physicalRight;
+                naturalPhysicalTop = mViewport.deviceHeight - mViewport.physicalBottom;
+                naturalDeviceWidth = mViewport.deviceWidth;
+                naturalDeviceHeight = mViewport.deviceHeight;
+                break;
+            case DISPLAY_ORIENTATION_270:
+                naturalLogicalWidth = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalLogicalHeight = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalPhysicalWidth = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalHeight = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalLeft = mViewport.physicalTop;
+                naturalPhysicalTop = mViewport.deviceWidth - mViewport.physicalRight;
+                naturalDeviceWidth = mViewport.deviceHeight;
+                naturalDeviceHeight = mViewport.deviceWidth;
+                break;
+            case DISPLAY_ORIENTATION_0:
+            default:
+                naturalLogicalWidth = mViewport.logicalRight - mViewport.logicalLeft;
+                naturalLogicalHeight = mViewport.logicalBottom - mViewport.logicalTop;
+                naturalPhysicalWidth = mViewport.physicalRight - mViewport.physicalLeft;
+                naturalPhysicalHeight = mViewport.physicalBottom - mViewport.physicalTop;
+                naturalPhysicalLeft = mViewport.physicalLeft;
+                naturalPhysicalTop = mViewport.physicalTop;
+                naturalDeviceWidth = mViewport.deviceWidth;
+                naturalDeviceHeight = mViewport.deviceHeight;
+                break;
+            }
+
+            mSurfaceWidth = naturalLogicalWidth * naturalDeviceWidth / naturalPhysicalWidth;
+            mSurfaceHeight = naturalLogicalHeight * naturalDeviceHeight / naturalPhysicalHeight;
+            mSurfaceLeft = naturalPhysicalLeft * naturalLogicalWidth / naturalPhysicalWidth;
+            mSurfaceTop = naturalPhysicalTop * naturalLogicalHeight / naturalPhysicalHeight;
+
+            mSurfaceOrientation = mParameters.orientationAware ?
+                    mViewport.orientation : DISPLAY_ORIENTATION_0;
+        } else {
+            mSurfaceWidth = rawWidth;
+            mSurfaceHeight = rawHeight;
+            mSurfaceLeft = 0;
+            mSurfaceTop = 0;
+            mSurfaceOrientation = DISPLAY_ORIENTATION_0;
+        }
+    }
+
+    // If moving between pointer modes, need to reset some state.
+    bool deviceModeChanged = mDeviceMode != oldDeviceMode;
+    if (deviceModeChanged) {
+        mOrientedRanges.clear();
+    }
+
+    // Create pointer controller if needed.
+    if (mDeviceMode == DEVICE_MODE_POINTER ||
+            (mDeviceMode == DEVICE_MODE_DIRECT && mConfig.showTouches)) {
+        if (mPointerController == NULL) {
+            mPointerController = getPolicy()->obtainPointerController(getDeviceId());
+        }
+    } else {
+        mPointerController.clear();
+    }
+
+    if (viewportChanged || deviceModeChanged) {
+        ALOGI("Device reconfigured: id=%d, name='%s', size %dx%d, orientation %d, mode %d, "
+                "display id %d",
+                getDeviceId(), getDeviceName().string(), mSurfaceWidth, mSurfaceHeight,
+                mSurfaceOrientation, mDeviceMode, mViewport.displayId);
+
+        // Configure X and Y factors.
+        mXScale = float(mSurfaceWidth) / rawWidth;
+        mYScale = float(mSurfaceHeight) / rawHeight;
+        mXTranslate = -mSurfaceLeft;
+        mYTranslate = -mSurfaceTop;
+        mXPrecision = 1.0f / mXScale;
+        mYPrecision = 1.0f / mYScale;
+
+        mOrientedRanges.x.axis = AMOTION_EVENT_AXIS_X;
+        mOrientedRanges.x.source = mSource;
+        mOrientedRanges.y.axis = AMOTION_EVENT_AXIS_Y;
+        mOrientedRanges.y.source = mSource;
+
+        configureVirtualKeys();
+
+        // Scale factor for terms that are not oriented in a particular axis.
+        // If the pixels are square then xScale == yScale otherwise we fake it
+        // by choosing an average.
+        mGeometricScale = avg(mXScale, mYScale);
+
+        // Size of diagonal axis.
+        float diagonalSize = hypotf(mSurfaceWidth, mSurfaceHeight);
+
+        // Size factors.
+        if (mCalibration.sizeCalibration != Calibration::SIZE_CALIBRATION_NONE) {
+            if (mRawPointerAxes.touchMajor.valid
+                    && mRawPointerAxes.touchMajor.maxValue != 0) {
+                mSizeScale = 1.0f / mRawPointerAxes.touchMajor.maxValue;
+            } else if (mRawPointerAxes.toolMajor.valid
+                    && mRawPointerAxes.toolMajor.maxValue != 0) {
+                mSizeScale = 1.0f / mRawPointerAxes.toolMajor.maxValue;
+            } else {
+                mSizeScale = 0.0f;
+            }
+
+            mOrientedRanges.haveTouchSize = true;
+            mOrientedRanges.haveToolSize = true;
+            mOrientedRanges.haveSize = true;
+
+            mOrientedRanges.touchMajor.axis = AMOTION_EVENT_AXIS_TOUCH_MAJOR;
+            mOrientedRanges.touchMajor.source = mSource;
+            mOrientedRanges.touchMajor.min = 0;
+            mOrientedRanges.touchMajor.max = diagonalSize;
+            mOrientedRanges.touchMajor.flat = 0;
+            mOrientedRanges.touchMajor.fuzz = 0;
+            mOrientedRanges.touchMajor.resolution = 0;
+
+            mOrientedRanges.touchMinor = mOrientedRanges.touchMajor;
+            mOrientedRanges.touchMinor.axis = AMOTION_EVENT_AXIS_TOUCH_MINOR;
+
+            mOrientedRanges.toolMajor.axis = AMOTION_EVENT_AXIS_TOOL_MAJOR;
+            mOrientedRanges.toolMajor.source = mSource;
+            mOrientedRanges.toolMajor.min = 0;
+            mOrientedRanges.toolMajor.max = diagonalSize;
+            mOrientedRanges.toolMajor.flat = 0;
+            mOrientedRanges.toolMajor.fuzz = 0;
+            mOrientedRanges.toolMajor.resolution = 0;
+
+            mOrientedRanges.toolMinor = mOrientedRanges.toolMajor;
+            mOrientedRanges.toolMinor.axis = AMOTION_EVENT_AXIS_TOOL_MINOR;
+
+            mOrientedRanges.size.axis = AMOTION_EVENT_AXIS_SIZE;
+            mOrientedRanges.size.source = mSource;
+            mOrientedRanges.size.min = 0;
+            mOrientedRanges.size.max = 1.0;
+            mOrientedRanges.size.flat = 0;
+            mOrientedRanges.size.fuzz = 0;
+            mOrientedRanges.size.resolution = 0;
+        } else {
+            mSizeScale = 0.0f;
+        }
+
+        // Pressure factors.
+        mPressureScale = 0;
+        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_PHYSICAL
+                || mCalibration.pressureCalibration
+                        == Calibration::PRESSURE_CALIBRATION_AMPLITUDE) {
+            if (mCalibration.havePressureScale) {
+                mPressureScale = mCalibration.pressureScale;
+            } else if (mRawPointerAxes.pressure.valid
+                    && mRawPointerAxes.pressure.maxValue != 0) {
+                mPressureScale = 1.0f / mRawPointerAxes.pressure.maxValue;
+            }
+        }
+
+        mOrientedRanges.pressure.axis = AMOTION_EVENT_AXIS_PRESSURE;
+        mOrientedRanges.pressure.source = mSource;
+        mOrientedRanges.pressure.min = 0;
+        mOrientedRanges.pressure.max = 1.0;
+        mOrientedRanges.pressure.flat = 0;
+        mOrientedRanges.pressure.fuzz = 0;
+        mOrientedRanges.pressure.resolution = 0;
+
+        // Tilt
+        mTiltXCenter = 0;
+        mTiltXScale = 0;
+        mTiltYCenter = 0;
+        mTiltYScale = 0;
+        mHaveTilt = mRawPointerAxes.tiltX.valid && mRawPointerAxes.tiltY.valid;
+        if (mHaveTilt) {
+            mTiltXCenter = avg(mRawPointerAxes.tiltX.minValue,
+                    mRawPointerAxes.tiltX.maxValue);
+            mTiltYCenter = avg(mRawPointerAxes.tiltY.minValue,
+                    mRawPointerAxes.tiltY.maxValue);
+            mTiltXScale = M_PI / 180;
+            mTiltYScale = M_PI / 180;
+
+            mOrientedRanges.haveTilt = true;
+
+            mOrientedRanges.tilt.axis = AMOTION_EVENT_AXIS_TILT;
+            mOrientedRanges.tilt.source = mSource;
+            mOrientedRanges.tilt.min = 0;
+            mOrientedRanges.tilt.max = M_PI_2;
+            mOrientedRanges.tilt.flat = 0;
+            mOrientedRanges.tilt.fuzz = 0;
+            mOrientedRanges.tilt.resolution = 0;
+        }
+
+        // Orientation
+        mOrientationScale = 0;
+        if (mHaveTilt) {
+            mOrientedRanges.haveOrientation = true;
+
+            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
+            mOrientedRanges.orientation.source = mSource;
+            mOrientedRanges.orientation.min = -M_PI;
+            mOrientedRanges.orientation.max = M_PI;
+            mOrientedRanges.orientation.flat = 0;
+            mOrientedRanges.orientation.fuzz = 0;
+            mOrientedRanges.orientation.resolution = 0;
+        } else if (mCalibration.orientationCalibration !=
+                Calibration::ORIENTATION_CALIBRATION_NONE) {
+            if (mCalibration.orientationCalibration
+                    == Calibration::ORIENTATION_CALIBRATION_INTERPOLATED) {
+                if (mRawPointerAxes.orientation.valid) {
+                    if (mRawPointerAxes.orientation.maxValue > 0) {
+                        mOrientationScale = M_PI_2 / mRawPointerAxes.orientation.maxValue;
+                    } else if (mRawPointerAxes.orientation.minValue < 0) {
+                        mOrientationScale = -M_PI_2 / mRawPointerAxes.orientation.minValue;
+                    } else {
+                        mOrientationScale = 0;
+                    }
+                }
+            }
+
+            mOrientedRanges.haveOrientation = true;
+
+            mOrientedRanges.orientation.axis = AMOTION_EVENT_AXIS_ORIENTATION;
+            mOrientedRanges.orientation.source = mSource;
+            mOrientedRanges.orientation.min = -M_PI_2;
+            mOrientedRanges.orientation.max = M_PI_2;
+            mOrientedRanges.orientation.flat = 0;
+            mOrientedRanges.orientation.fuzz = 0;
+            mOrientedRanges.orientation.resolution = 0;
+        }
+
+        // Distance
+        mDistanceScale = 0;
+        if (mCalibration.distanceCalibration != Calibration::DISTANCE_CALIBRATION_NONE) {
+            if (mCalibration.distanceCalibration
+                    == Calibration::DISTANCE_CALIBRATION_SCALED) {
+                if (mCalibration.haveDistanceScale) {
+                    mDistanceScale = mCalibration.distanceScale;
+                } else {
+                    mDistanceScale = 1.0f;
+                }
+            }
+
+            mOrientedRanges.haveDistance = true;
+
+            mOrientedRanges.distance.axis = AMOTION_EVENT_AXIS_DISTANCE;
+            mOrientedRanges.distance.source = mSource;
+            mOrientedRanges.distance.min =
+                    mRawPointerAxes.distance.minValue * mDistanceScale;
+            mOrientedRanges.distance.max =
+                    mRawPointerAxes.distance.maxValue * mDistanceScale;
+            mOrientedRanges.distance.flat = 0;
+            mOrientedRanges.distance.fuzz =
+                    mRawPointerAxes.distance.fuzz * mDistanceScale;
+            mOrientedRanges.distance.resolution = 0;
+        }
+
+        // Compute oriented precision, scales and ranges.
+        // Note that the maximum value reported is an inclusive maximum value so it is one
+        // unit less than the total width or height of surface.
+        switch (mSurfaceOrientation) {
+        case DISPLAY_ORIENTATION_90:
+        case DISPLAY_ORIENTATION_270:
+            mOrientedXPrecision = mYPrecision;
+            mOrientedYPrecision = mXPrecision;
+
+            mOrientedRanges.x.min = mYTranslate;
+            mOrientedRanges.x.max = mSurfaceHeight + mYTranslate - 1;
+            mOrientedRanges.x.flat = 0;
+            mOrientedRanges.x.fuzz = 0;
+            mOrientedRanges.x.resolution = mRawPointerAxes.y.resolution * mYScale;
+
+            mOrientedRanges.y.min = mXTranslate;
+            mOrientedRanges.y.max = mSurfaceWidth + mXTranslate - 1;
+            mOrientedRanges.y.flat = 0;
+            mOrientedRanges.y.fuzz = 0;
+            mOrientedRanges.y.resolution = mRawPointerAxes.x.resolution * mXScale;
+            break;
+
+        default:
+            mOrientedXPrecision = mXPrecision;
+            mOrientedYPrecision = mYPrecision;
+
+            mOrientedRanges.x.min = mXTranslate;
+            mOrientedRanges.x.max = mSurfaceWidth + mXTranslate - 1;
+            mOrientedRanges.x.flat = 0;
+            mOrientedRanges.x.fuzz = 0;
+            mOrientedRanges.x.resolution = mRawPointerAxes.x.resolution * mXScale;
+
+            mOrientedRanges.y.min = mYTranslate;
+            mOrientedRanges.y.max = mSurfaceHeight + mYTranslate - 1;
+            mOrientedRanges.y.flat = 0;
+            mOrientedRanges.y.fuzz = 0;
+            mOrientedRanges.y.resolution = mRawPointerAxes.y.resolution * mYScale;
+            break;
+        }
+
+        if (mDeviceMode == DEVICE_MODE_POINTER) {
+            // Compute pointer gesture detection parameters.
+            float rawDiagonal = hypotf(rawWidth, rawHeight);
+            float displayDiagonal = hypotf(mSurfaceWidth, mSurfaceHeight);
+
+            // Scale movements such that one whole swipe of the touch pad covers a
+            // given area relative to the diagonal size of the display when no acceleration
+            // is applied.
+            // Assume that the touch pad has a square aspect ratio such that movements in
+            // X and Y of the same number of raw units cover the same physical distance.
+            mPointerXMovementScale = mConfig.pointerGestureMovementSpeedRatio
+                    * displayDiagonal / rawDiagonal;
+            mPointerYMovementScale = mPointerXMovementScale;
+
+            // Scale zooms to cover a smaller range of the display than movements do.
+            // This value determines the area around the pointer that is affected by freeform
+            // pointer gestures.
+            mPointerXZoomScale = mConfig.pointerGestureZoomSpeedRatio
+                    * displayDiagonal / rawDiagonal;
+            mPointerYZoomScale = mPointerXZoomScale;
+
+            // Max width between pointers to detect a swipe gesture is more than some fraction
+            // of the diagonal axis of the touch pad.  Touches that are wider than this are
+            // translated into freeform gestures.
+            mPointerGestureMaxSwipeWidth =
+                    mConfig.pointerGestureSwipeMaxWidthRatio * rawDiagonal;
+
+            // Abort current pointer usages because the state has changed.
+            abortPointerUsage(when, 0 /*policyFlags*/);
+        }
+
+        // Inform the dispatcher about the changes.
+        *outResetNeeded = true;
+        bumpGeneration();
+    }
+}
+
+void TouchInputMapper::dumpSurface(String8& dump) {
+    dump.appendFormat(INDENT3 "Viewport: displayId=%d, orientation=%d, "
+            "logicalFrame=[%d, %d, %d, %d], "
+            "physicalFrame=[%d, %d, %d, %d], "
+            "deviceSize=[%d, %d]\n",
+            mViewport.displayId, mViewport.orientation,
+            mViewport.logicalLeft, mViewport.logicalTop,
+            mViewport.logicalRight, mViewport.logicalBottom,
+            mViewport.physicalLeft, mViewport.physicalTop,
+            mViewport.physicalRight, mViewport.physicalBottom,
+            mViewport.deviceWidth, mViewport.deviceHeight);
+
+    dump.appendFormat(INDENT3 "SurfaceWidth: %dpx\n", mSurfaceWidth);
+    dump.appendFormat(INDENT3 "SurfaceHeight: %dpx\n", mSurfaceHeight);
+    dump.appendFormat(INDENT3 "SurfaceLeft: %d\n", mSurfaceLeft);
+    dump.appendFormat(INDENT3 "SurfaceTop: %d\n", mSurfaceTop);
+    dump.appendFormat(INDENT3 "SurfaceOrientation: %d\n", mSurfaceOrientation);
+}
+
+void TouchInputMapper::configureVirtualKeys() {
+    Vector<VirtualKeyDefinition> virtualKeyDefinitions;
+    getEventHub()->getVirtualKeyDefinitions(getDeviceId(), virtualKeyDefinitions);
+
+    mVirtualKeys.clear();
+
+    if (virtualKeyDefinitions.size() == 0) {
+        return;
+    }
+
+    mVirtualKeys.setCapacity(virtualKeyDefinitions.size());
+
+    int32_t touchScreenLeft = mRawPointerAxes.x.minValue;
+    int32_t touchScreenTop = mRawPointerAxes.y.minValue;
+    int32_t touchScreenWidth = mRawPointerAxes.x.maxValue - mRawPointerAxes.x.minValue + 1;
+    int32_t touchScreenHeight = mRawPointerAxes.y.maxValue - mRawPointerAxes.y.minValue + 1;
+
+    for (size_t i = 0; i < virtualKeyDefinitions.size(); i++) {
+        const VirtualKeyDefinition& virtualKeyDefinition =
+                virtualKeyDefinitions[i];
+
+        mVirtualKeys.add();
+        VirtualKey& virtualKey = mVirtualKeys.editTop();
+
+        virtualKey.scanCode = virtualKeyDefinition.scanCode;
+        int32_t keyCode;
+        uint32_t flags;
+        if (getEventHub()->mapKey(getDeviceId(), virtualKey.scanCode, 0, &keyCode, &flags)) {
+            ALOGW(INDENT "VirtualKey %d: could not obtain key code, ignoring",
+                    virtualKey.scanCode);
+            mVirtualKeys.pop(); // drop the key
+            continue;
+        }
+
+        virtualKey.keyCode = keyCode;
+        virtualKey.flags = flags;
+
+        // convert the key definition's display coordinates into touch coordinates for a hit box
+        int32_t halfWidth = virtualKeyDefinition.width / 2;
+        int32_t halfHeight = virtualKeyDefinition.height / 2;
+
+        virtualKey.hitLeft = (virtualKeyDefinition.centerX - halfWidth)
+                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
+        virtualKey.hitRight= (virtualKeyDefinition.centerX + halfWidth)
+                * touchScreenWidth / mSurfaceWidth + touchScreenLeft;
+        virtualKey.hitTop = (virtualKeyDefinition.centerY - halfHeight)
+                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
+        virtualKey.hitBottom = (virtualKeyDefinition.centerY + halfHeight)
+                * touchScreenHeight / mSurfaceHeight + touchScreenTop;
+    }
+}
+
+void TouchInputMapper::dumpVirtualKeys(String8& dump) {
+    if (!mVirtualKeys.isEmpty()) {
+        dump.append(INDENT3 "Virtual Keys:\n");
+
+        for (size_t i = 0; i < mVirtualKeys.size(); i++) {
+            const VirtualKey& virtualKey = mVirtualKeys.itemAt(i);
+            dump.appendFormat(INDENT4 "%d: scanCode=%d, keyCode=%d, "
+                    "hitLeft=%d, hitRight=%d, hitTop=%d, hitBottom=%d\n",
+                    i, virtualKey.scanCode, virtualKey.keyCode,
+                    virtualKey.hitLeft, virtualKey.hitRight,
+                    virtualKey.hitTop, virtualKey.hitBottom);
+        }
+    }
+}
+
+void TouchInputMapper::parseCalibration() {
+    const PropertyMap& in = getDevice()->getConfiguration();
+    Calibration& out = mCalibration;
+
+    // Size
+    out.sizeCalibration = Calibration::SIZE_CALIBRATION_DEFAULT;
+    String8 sizeCalibrationString;
+    if (in.tryGetProperty(String8("touch.size.calibration"), sizeCalibrationString)) {
+        if (sizeCalibrationString == "none") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
+        } else if (sizeCalibrationString == "geometric") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
+        } else if (sizeCalibrationString == "diameter") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_DIAMETER;
+        } else if (sizeCalibrationString == "box") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_BOX;
+        } else if (sizeCalibrationString == "area") {
+            out.sizeCalibration = Calibration::SIZE_CALIBRATION_AREA;
+        } else if (sizeCalibrationString != "default") {
+            ALOGW("Invalid value for touch.size.calibration: '%s'",
+                    sizeCalibrationString.string());
+        }
+    }
+
+    out.haveSizeScale = in.tryGetProperty(String8("touch.size.scale"),
+            out.sizeScale);
+    out.haveSizeBias = in.tryGetProperty(String8("touch.size.bias"),
+            out.sizeBias);
+    out.haveSizeIsSummed = in.tryGetProperty(String8("touch.size.isSummed"),
+            out.sizeIsSummed);
+
+    // Pressure
+    out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_DEFAULT;
+    String8 pressureCalibrationString;
+    if (in.tryGetProperty(String8("touch.pressure.calibration"), pressureCalibrationString)) {
+        if (pressureCalibrationString == "none") {
+            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
+        } else if (pressureCalibrationString == "physical") {
+            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
+        } else if (pressureCalibrationString == "amplitude") {
+            out.pressureCalibration = Calibration::PRESSURE_CALIBRATION_AMPLITUDE;
+        } else if (pressureCalibrationString != "default") {
+            ALOGW("Invalid value for touch.pressure.calibration: '%s'",
+                    pressureCalibrationString.string());
+        }
+    }
+
+    out.havePressureScale = in.tryGetProperty(String8("touch.pressure.scale"),
+            out.pressureScale);
+
+    // Orientation
+    out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_DEFAULT;
+    String8 orientationCalibrationString;
+    if (in.tryGetProperty(String8("touch.orientation.calibration"), orientationCalibrationString)) {
+        if (orientationCalibrationString == "none") {
+            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
+        } else if (orientationCalibrationString == "interpolated") {
+            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
+        } else if (orientationCalibrationString == "vector") {
+            out.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_VECTOR;
+        } else if (orientationCalibrationString != "default") {
+            ALOGW("Invalid value for touch.orientation.calibration: '%s'",
+                    orientationCalibrationString.string());
+        }
+    }
+
+    // Distance
+    out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_DEFAULT;
+    String8 distanceCalibrationString;
+    if (in.tryGetProperty(String8("touch.distance.calibration"), distanceCalibrationString)) {
+        if (distanceCalibrationString == "none") {
+            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
+        } else if (distanceCalibrationString == "scaled") {
+            out.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
+        } else if (distanceCalibrationString != "default") {
+            ALOGW("Invalid value for touch.distance.calibration: '%s'",
+                    distanceCalibrationString.string());
+        }
+    }
+
+    out.haveDistanceScale = in.tryGetProperty(String8("touch.distance.scale"),
+            out.distanceScale);
+
+    out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_DEFAULT;
+    String8 coverageCalibrationString;
+    if (in.tryGetProperty(String8("touch.coverage.calibration"), coverageCalibrationString)) {
+        if (coverageCalibrationString == "none") {
+            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
+        } else if (coverageCalibrationString == "box") {
+            out.coverageCalibration = Calibration::COVERAGE_CALIBRATION_BOX;
+        } else if (coverageCalibrationString != "default") {
+            ALOGW("Invalid value for touch.coverage.calibration: '%s'",
+                    coverageCalibrationString.string());
+        }
+    }
+}
+
+void TouchInputMapper::resolveCalibration() {
+    // Size
+    if (mRawPointerAxes.touchMajor.valid || mRawPointerAxes.toolMajor.valid) {
+        if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DEFAULT) {
+            mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_GEOMETRIC;
+        }
+    } else {
+        mCalibration.sizeCalibration = Calibration::SIZE_CALIBRATION_NONE;
+    }
+
+    // Pressure
+    if (mRawPointerAxes.pressure.valid) {
+        if (mCalibration.pressureCalibration == Calibration::PRESSURE_CALIBRATION_DEFAULT) {
+            mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_PHYSICAL;
+        }
+    } else {
+        mCalibration.pressureCalibration = Calibration::PRESSURE_CALIBRATION_NONE;
+    }
+
+    // Orientation
+    if (mRawPointerAxes.orientation.valid) {
+        if (mCalibration.orientationCalibration == Calibration::ORIENTATION_CALIBRATION_DEFAULT) {
+            mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_INTERPOLATED;
+        }
+    } else {
+        mCalibration.orientationCalibration = Calibration::ORIENTATION_CALIBRATION_NONE;
+    }
+
+    // Distance
+    if (mRawPointerAxes.distance.valid) {
+        if (mCalibration.distanceCalibration == Calibration::DISTANCE_CALIBRATION_DEFAULT) {
+            mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_SCALED;
+        }
+    } else {
+        mCalibration.distanceCalibration = Calibration::DISTANCE_CALIBRATION_NONE;
+    }
+
+    // Coverage
+    if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_DEFAULT) {
+        mCalibration.coverageCalibration = Calibration::COVERAGE_CALIBRATION_NONE;
+    }
+}
+
+void TouchInputMapper::dumpCalibration(String8& dump) {
+    dump.append(INDENT3 "Calibration:\n");
+
+    // Size
+    switch (mCalibration.sizeCalibration) {
+    case Calibration::SIZE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.size.calibration: none\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_GEOMETRIC:
+        dump.append(INDENT4 "touch.size.calibration: geometric\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_DIAMETER:
+        dump.append(INDENT4 "touch.size.calibration: diameter\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_BOX:
+        dump.append(INDENT4 "touch.size.calibration: box\n");
+        break;
+    case Calibration::SIZE_CALIBRATION_AREA:
+        dump.append(INDENT4 "touch.size.calibration: area\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    if (mCalibration.haveSizeScale) {
+        dump.appendFormat(INDENT4 "touch.size.scale: %0.3f\n",
+                mCalibration.sizeScale);
+    }
+
+    if (mCalibration.haveSizeBias) {
+        dump.appendFormat(INDENT4 "touch.size.bias: %0.3f\n",
+                mCalibration.sizeBias);
+    }
+
+    if (mCalibration.haveSizeIsSummed) {
+        dump.appendFormat(INDENT4 "touch.size.isSummed: %s\n",
+                toString(mCalibration.sizeIsSummed));
+    }
+
+    // Pressure
+    switch (mCalibration.pressureCalibration) {
+    case Calibration::PRESSURE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.pressure.calibration: none\n");
+        break;
+    case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
+        dump.append(INDENT4 "touch.pressure.calibration: physical\n");
+        break;
+    case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
+        dump.append(INDENT4 "touch.pressure.calibration: amplitude\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    if (mCalibration.havePressureScale) {
+        dump.appendFormat(INDENT4 "touch.pressure.scale: %0.3f\n",
+                mCalibration.pressureScale);
+    }
+
+    // Orientation
+    switch (mCalibration.orientationCalibration) {
+    case Calibration::ORIENTATION_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.orientation.calibration: none\n");
+        break;
+    case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
+        dump.append(INDENT4 "touch.orientation.calibration: interpolated\n");
+        break;
+    case Calibration::ORIENTATION_CALIBRATION_VECTOR:
+        dump.append(INDENT4 "touch.orientation.calibration: vector\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    // Distance
+    switch (mCalibration.distanceCalibration) {
+    case Calibration::DISTANCE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.distance.calibration: none\n");
+        break;
+    case Calibration::DISTANCE_CALIBRATION_SCALED:
+        dump.append(INDENT4 "touch.distance.calibration: scaled\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+
+    if (mCalibration.haveDistanceScale) {
+        dump.appendFormat(INDENT4 "touch.distance.scale: %0.3f\n",
+                mCalibration.distanceScale);
+    }
+
+    switch (mCalibration.coverageCalibration) {
+    case Calibration::COVERAGE_CALIBRATION_NONE:
+        dump.append(INDENT4 "touch.coverage.calibration: none\n");
+        break;
+    case Calibration::COVERAGE_CALIBRATION_BOX:
+        dump.append(INDENT4 "touch.coverage.calibration: box\n");
+        break;
+    default:
+        ALOG_ASSERT(false);
+    }
+}
+
+void TouchInputMapper::reset(nsecs_t when) {
+    mCursorButtonAccumulator.reset(getDevice());
+    mCursorScrollAccumulator.reset(getDevice());
+    mTouchButtonAccumulator.reset(getDevice());
+
+    mPointerVelocityControl.reset();
+    mWheelXVelocityControl.reset();
+    mWheelYVelocityControl.reset();
+
+    mCurrentRawPointerData.clear();
+    mLastRawPointerData.clear();
+    mCurrentCookedPointerData.clear();
+    mLastCookedPointerData.clear();
+    mCurrentButtonState = 0;
+    mLastButtonState = 0;
+    mCurrentRawVScroll = 0;
+    mCurrentRawHScroll = 0;
+    mCurrentFingerIdBits.clear();
+    mLastFingerIdBits.clear();
+    mCurrentStylusIdBits.clear();
+    mLastStylusIdBits.clear();
+    mCurrentMouseIdBits.clear();
+    mLastMouseIdBits.clear();
+    mPointerUsage = POINTER_USAGE_NONE;
+    mSentHoverEnter = false;
+    mDownTime = 0;
+
+    mCurrentVirtualKey.down = false;
+
+    mPointerGesture.reset();
+    mPointerSimple.reset();
+
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        mPointerController->clearSpots();
+    }
+
+    InputMapper::reset(when);
+}
+
+void TouchInputMapper::process(const RawEvent* rawEvent) {
+    mCursorButtonAccumulator.process(rawEvent);
+    mCursorScrollAccumulator.process(rawEvent);
+    mTouchButtonAccumulator.process(rawEvent);
+
+    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
+        sync(rawEvent->when);
+    }
+}
+
+void TouchInputMapper::sync(nsecs_t when) {
+    // Sync button state.
+    mCurrentButtonState = mTouchButtonAccumulator.getButtonState()
+            | mCursorButtonAccumulator.getButtonState();
+
+    // Sync scroll state.
+    mCurrentRawVScroll = mCursorScrollAccumulator.getRelativeVWheel();
+    mCurrentRawHScroll = mCursorScrollAccumulator.getRelativeHWheel();
+    mCursorScrollAccumulator.finishSync();
+
+    // Sync touch state.
+    bool havePointerIds = true;
+    mCurrentRawPointerData.clear();
+    syncTouch(when, &havePointerIds);
+
+#if DEBUG_RAW_EVENTS
+    if (!havePointerIds) {
+        ALOGD("syncTouch: pointerCount %d -> %d, no pointer ids",
+                mLastRawPointerData.pointerCount,
+                mCurrentRawPointerData.pointerCount);
+    } else {
+        ALOGD("syncTouch: pointerCount %d -> %d, touching ids 0x%08x -> 0x%08x, "
+                "hovering ids 0x%08x -> 0x%08x",
+                mLastRawPointerData.pointerCount,
+                mCurrentRawPointerData.pointerCount,
+                mLastRawPointerData.touchingIdBits.value,
+                mCurrentRawPointerData.touchingIdBits.value,
+                mLastRawPointerData.hoveringIdBits.value,
+                mCurrentRawPointerData.hoveringIdBits.value);
+    }
+#endif
+
+    // Reset state that we will compute below.
+    mCurrentFingerIdBits.clear();
+    mCurrentStylusIdBits.clear();
+    mCurrentMouseIdBits.clear();
+    mCurrentCookedPointerData.clear();
+
+    if (mDeviceMode == DEVICE_MODE_DISABLED) {
+        // Drop all input if the device is disabled.
+        mCurrentRawPointerData.clear();
+        mCurrentButtonState = 0;
+    } else {
+        // Preprocess pointer data.
+        if (!havePointerIds) {
+            assignPointerIds();
+        }
+
+        // Handle policy on initial down or hover events.
+        uint32_t policyFlags = 0;
+        bool initialDown = mLastRawPointerData.pointerCount == 0
+                && mCurrentRawPointerData.pointerCount != 0;
+        bool buttonsPressed = mCurrentButtonState & ~mLastButtonState;
+        if (initialDown || buttonsPressed) {
+            // If this is a touch screen, hide the pointer on an initial down.
+            if (mDeviceMode == DEVICE_MODE_DIRECT) {
+                getContext()->fadePointer();
+            }
+
+            // Initial downs on external touch devices should wake the device.
+            // We don't do this for internal touch screens to prevent them from waking
+            // up in your pocket.
+            // TODO: Use the input device configuration to control this behavior more finely.
+            if (getDevice()->isExternal()) {
+                policyFlags |= POLICY_FLAG_WAKE_DROPPED;
+            }
+        }
+
+        // Synthesize key down from raw buttons if needed.
+        synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_DOWN, when, getDeviceId(), mSource,
+                policyFlags, mLastButtonState, mCurrentButtonState);
+
+        // Consume raw off-screen touches before cooking pointer data.
+        // If touches are consumed, subsequent code will not receive any pointer data.
+        if (consumeRawTouches(when, policyFlags)) {
+            mCurrentRawPointerData.clear();
+        }
+
+        // Cook pointer data.  This call populates the mCurrentCookedPointerData structure
+        // with cooked pointer data that has the same ids and indices as the raw data.
+        // The following code can use either the raw or cooked data, as needed.
+        cookPointerData();
+
+        // Dispatch the touches either directly or by translation through a pointer on screen.
+        if (mDeviceMode == DEVICE_MODE_POINTER) {
+            for (BitSet32 idBits(mCurrentRawPointerData.touchingIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+                if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
+                        || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
+                    mCurrentStylusIdBits.markBit(id);
+                } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_FINGER
+                        || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+                    mCurrentFingerIdBits.markBit(id);
+                } else if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_MOUSE) {
+                    mCurrentMouseIdBits.markBit(id);
+                }
+            }
+            for (BitSet32 idBits(mCurrentRawPointerData.hoveringIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+                if (pointer.toolType == AMOTION_EVENT_TOOL_TYPE_STYLUS
+                        || pointer.toolType == AMOTION_EVENT_TOOL_TYPE_ERASER) {
+                    mCurrentStylusIdBits.markBit(id);
+                }
+            }
+
+            // Stylus takes precedence over all tools, then mouse, then finger.
+            PointerUsage pointerUsage = mPointerUsage;
+            if (!mCurrentStylusIdBits.isEmpty()) {
+                mCurrentMouseIdBits.clear();
+                mCurrentFingerIdBits.clear();
+                pointerUsage = POINTER_USAGE_STYLUS;
+            } else if (!mCurrentMouseIdBits.isEmpty()) {
+                mCurrentFingerIdBits.clear();
+                pointerUsage = POINTER_USAGE_MOUSE;
+            } else if (!mCurrentFingerIdBits.isEmpty() || isPointerDown(mCurrentButtonState)) {
+                pointerUsage = POINTER_USAGE_GESTURES;
+            }
+
+            dispatchPointerUsage(when, policyFlags, pointerUsage);
+        } else {
+            if (mDeviceMode == DEVICE_MODE_DIRECT
+                    && mConfig.showTouches && mPointerController != NULL) {
+                mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
+                mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+
+                mPointerController->setButtonState(mCurrentButtonState);
+                mPointerController->setSpots(mCurrentCookedPointerData.pointerCoords,
+                        mCurrentCookedPointerData.idToIndex,
+                        mCurrentCookedPointerData.touchingIdBits);
+            }
+
+            dispatchHoverExit(when, policyFlags);
+            dispatchTouches(when, policyFlags);
+            dispatchHoverEnterAndMove(when, policyFlags);
+        }
+
+        // Synthesize key up from raw buttons if needed.
+        synthesizeButtonKeys(getContext(), AKEY_EVENT_ACTION_UP, when, getDeviceId(), mSource,
+                policyFlags, mLastButtonState, mCurrentButtonState);
+    }
+
+    // Copy current touch to last touch in preparation for the next cycle.
+    mLastRawPointerData.copyFrom(mCurrentRawPointerData);
+    mLastCookedPointerData.copyFrom(mCurrentCookedPointerData);
+    mLastButtonState = mCurrentButtonState;
+    mLastFingerIdBits = mCurrentFingerIdBits;
+    mLastStylusIdBits = mCurrentStylusIdBits;
+    mLastMouseIdBits = mCurrentMouseIdBits;
+
+    // Clear some transient state.
+    mCurrentRawVScroll = 0;
+    mCurrentRawHScroll = 0;
+}
+
+void TouchInputMapper::timeoutExpired(nsecs_t when) {
+    if (mDeviceMode == DEVICE_MODE_POINTER) {
+        if (mPointerUsage == POINTER_USAGE_GESTURES) {
+            dispatchPointerGestures(when, 0 /*policyFlags*/, true /*isTimeout*/);
+        }
+    }
+}
+
+bool TouchInputMapper::consumeRawTouches(nsecs_t when, uint32_t policyFlags) {
+    // Check for release of a virtual key.
+    if (mCurrentVirtualKey.down) {
+        if (mCurrentRawPointerData.touchingIdBits.isEmpty()) {
+            // Pointer went up while virtual key was down.
+            mCurrentVirtualKey.down = false;
+            if (!mCurrentVirtualKey.ignored) {
+#if DEBUG_VIRTUAL_KEYS
+                ALOGD("VirtualKeys: Generating key up: keyCode=%d, scanCode=%d",
+                        mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
+#endif
+                dispatchVirtualKey(when, policyFlags,
+                        AKEY_EVENT_ACTION_UP,
+                        AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
+            }
+            return true;
+        }
+
+        if (mCurrentRawPointerData.touchingIdBits.count() == 1) {
+            uint32_t id = mCurrentRawPointerData.touchingIdBits.firstMarkedBit();
+            const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+            const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
+            if (virtualKey && virtualKey->keyCode == mCurrentVirtualKey.keyCode) {
+                // Pointer is still within the space of the virtual key.
+                return true;
+            }
+        }
+
+        // Pointer left virtual key area or another pointer also went down.
+        // Send key cancellation but do not consume the touch yet.
+        // This is useful when the user swipes through from the virtual key area
+        // into the main display surface.
+        mCurrentVirtualKey.down = false;
+        if (!mCurrentVirtualKey.ignored) {
+#if DEBUG_VIRTUAL_KEYS
+            ALOGD("VirtualKeys: Canceling key: keyCode=%d, scanCode=%d",
+                    mCurrentVirtualKey.keyCode, mCurrentVirtualKey.scanCode);
+#endif
+            dispatchVirtualKey(when, policyFlags,
+                    AKEY_EVENT_ACTION_UP,
+                    AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY
+                            | AKEY_EVENT_FLAG_CANCELED);
+        }
+    }
+
+    if (mLastRawPointerData.touchingIdBits.isEmpty()
+            && !mCurrentRawPointerData.touchingIdBits.isEmpty()) {
+        // Pointer just went down.  Check for virtual key press or off-screen touches.
+        uint32_t id = mCurrentRawPointerData.touchingIdBits.firstMarkedBit();
+        const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+        if (!isPointInsideSurface(pointer.x, pointer.y)) {
+            // If exactly one pointer went down, check for virtual key hit.
+            // Otherwise we will drop the entire stroke.
+            if (mCurrentRawPointerData.touchingIdBits.count() == 1) {
+                const VirtualKey* virtualKey = findVirtualKeyHit(pointer.x, pointer.y);
+                if (virtualKey) {
+                    mCurrentVirtualKey.down = true;
+                    mCurrentVirtualKey.downTime = when;
+                    mCurrentVirtualKey.keyCode = virtualKey->keyCode;
+                    mCurrentVirtualKey.scanCode = virtualKey->scanCode;
+                    mCurrentVirtualKey.ignored = mContext->shouldDropVirtualKey(
+                            when, getDevice(), virtualKey->keyCode, virtualKey->scanCode);
+
+                    if (!mCurrentVirtualKey.ignored) {
+#if DEBUG_VIRTUAL_KEYS
+                        ALOGD("VirtualKeys: Generating key down: keyCode=%d, scanCode=%d",
+                                mCurrentVirtualKey.keyCode,
+                                mCurrentVirtualKey.scanCode);
+#endif
+                        dispatchVirtualKey(when, policyFlags,
+                                AKEY_EVENT_ACTION_DOWN,
+                                AKEY_EVENT_FLAG_FROM_SYSTEM | AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+
+    // Disable all virtual key touches that happen within a short time interval of the
+    // most recent touch within the screen area.  The idea is to filter out stray
+    // virtual key presses when interacting with the touch screen.
+    //
+    // Problems we're trying to solve:
+    //
+    // 1. While scrolling a list or dragging the window shade, the user swipes down into a
+    //    virtual key area that is implemented by a separate touch panel and accidentally
+    //    triggers a virtual key.
+    //
+    // 2. While typing in the on screen keyboard, the user taps slightly outside the screen
+    //    area and accidentally triggers a virtual key.  This often happens when virtual keys
+    //    are layed out below the screen near to where the on screen keyboard's space bar
+    //    is displayed.
+    if (mConfig.virtualKeyQuietTime > 0 && !mCurrentRawPointerData.touchingIdBits.isEmpty()) {
+        mContext->disableVirtualKeysUntil(when + mConfig.virtualKeyQuietTime);
+    }
+    return false;
+}
+
+void TouchInputMapper::dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
+        int32_t keyEventAction, int32_t keyEventFlags) {
+    int32_t keyCode = mCurrentVirtualKey.keyCode;
+    int32_t scanCode = mCurrentVirtualKey.scanCode;
+    nsecs_t downTime = mCurrentVirtualKey.downTime;
+    int32_t metaState = mContext->getGlobalMetaState();
+    policyFlags |= POLICY_FLAG_VIRTUAL;
+
+    NotifyKeyArgs args(when, getDeviceId(), AINPUT_SOURCE_KEYBOARD, policyFlags,
+            keyEventAction, keyEventFlags, keyCode, scanCode, metaState, downTime);
+    getListener()->notifyKey(&args);
+}
+
+void TouchInputMapper::dispatchTouches(nsecs_t when, uint32_t policyFlags) {
+    BitSet32 currentIdBits = mCurrentCookedPointerData.touchingIdBits;
+    BitSet32 lastIdBits = mLastCookedPointerData.touchingIdBits;
+    int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mCurrentButtonState;
+
+    if (currentIdBits == lastIdBits) {
+        if (!currentIdBits.isEmpty()) {
+            // No pointer id changes so this is a move event.
+            // The listener takes care of batching moves so we don't have to deal with that here.
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState,
+                    AMOTION_EVENT_EDGE_FLAG_NONE,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    currentIdBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        }
+    } else {
+        // There may be pointers going up and pointers going down and pointers moving
+        // all at the same time.
+        BitSet32 upIdBits(lastIdBits.value & ~currentIdBits.value);
+        BitSet32 downIdBits(currentIdBits.value & ~lastIdBits.value);
+        BitSet32 moveIdBits(lastIdBits.value & currentIdBits.value);
+        BitSet32 dispatchedIdBits(lastIdBits.value);
+
+        // Update last coordinates of pointers that have moved so that we observe the new
+        // pointer positions at the same time as other pointers that have just gone up.
+        bool moveNeeded = updateMovedPointers(
+                mCurrentCookedPointerData.pointerProperties,
+                mCurrentCookedPointerData.pointerCoords,
+                mCurrentCookedPointerData.idToIndex,
+                mLastCookedPointerData.pointerProperties,
+                mLastCookedPointerData.pointerCoords,
+                mLastCookedPointerData.idToIndex,
+                moveIdBits);
+        if (buttonState != mLastButtonState) {
+            moveNeeded = true;
+        }
+
+        // Dispatch pointer up events.
+        while (!upIdBits.isEmpty()) {
+            uint32_t upId = upIdBits.clearFirstMarkedBit();
+
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_POINTER_UP, 0, metaState, buttonState, 0,
+                    mLastCookedPointerData.pointerProperties,
+                    mLastCookedPointerData.pointerCoords,
+                    mLastCookedPointerData.idToIndex,
+                    dispatchedIdBits, upId,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+            dispatchedIdBits.clearBit(upId);
+        }
+
+        // Dispatch move events if any of the remaining pointers moved from their old locations.
+        // Although applications receive new locations as part of individual pointer up
+        // events, they do not generally handle them except when presented in a move event.
+        if (moveNeeded) {
+            ALOG_ASSERT(moveIdBits.value == dispatchedIdBits.value);
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, 0,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    dispatchedIdBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        }
+
+        // Dispatch pointer down events using the new pointer locations.
+        while (!downIdBits.isEmpty()) {
+            uint32_t downId = downIdBits.clearFirstMarkedBit();
+            dispatchedIdBits.markBit(downId);
+
+            if (dispatchedIdBits.count() == 1) {
+                // First pointer is going down.  Set down time.
+                mDownTime = when;
+            }
+
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    dispatchedIdBits, downId,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        }
+    }
+}
+
+void TouchInputMapper::dispatchHoverExit(nsecs_t when, uint32_t policyFlags) {
+    if (mSentHoverEnter &&
+            (mCurrentCookedPointerData.hoveringIdBits.isEmpty()
+                    || !mCurrentCookedPointerData.touchingIdBits.isEmpty())) {
+        int32_t metaState = getContext()->getGlobalMetaState();
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastButtonState, 0,
+                mLastCookedPointerData.pointerProperties,
+                mLastCookedPointerData.pointerCoords,
+                mLastCookedPointerData.idToIndex,
+                mLastCookedPointerData.hoveringIdBits, -1,
+                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+        mSentHoverEnter = false;
+    }
+}
+
+void TouchInputMapper::dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags) {
+    if (mCurrentCookedPointerData.touchingIdBits.isEmpty()
+            && !mCurrentCookedPointerData.hoveringIdBits.isEmpty()) {
+        int32_t metaState = getContext()->getGlobalMetaState();
+        if (!mSentHoverEnter) {
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState, mCurrentButtonState, 0,
+                    mCurrentCookedPointerData.pointerProperties,
+                    mCurrentCookedPointerData.pointerCoords,
+                    mCurrentCookedPointerData.idToIndex,
+                    mCurrentCookedPointerData.hoveringIdBits, -1,
+                    mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+            mSentHoverEnter = true;
+        }
+
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState, mCurrentButtonState, 0,
+                mCurrentCookedPointerData.pointerProperties,
+                mCurrentCookedPointerData.pointerCoords,
+                mCurrentCookedPointerData.idToIndex,
+                mCurrentCookedPointerData.hoveringIdBits, -1,
+                mOrientedXPrecision, mOrientedYPrecision, mDownTime);
+    }
+}
+
+void TouchInputMapper::cookPointerData() {
+    uint32_t currentPointerCount = mCurrentRawPointerData.pointerCount;
+
+    mCurrentCookedPointerData.clear();
+    mCurrentCookedPointerData.pointerCount = currentPointerCount;
+    mCurrentCookedPointerData.hoveringIdBits = mCurrentRawPointerData.hoveringIdBits;
+    mCurrentCookedPointerData.touchingIdBits = mCurrentRawPointerData.touchingIdBits;
+
+    // Walk through the the active pointers and map device coordinates onto
+    // surface coordinates and adjust for display orientation.
+    for (uint32_t i = 0; i < currentPointerCount; i++) {
+        const RawPointerData::Pointer& in = mCurrentRawPointerData.pointers[i];
+
+        // Size
+        float touchMajor, touchMinor, toolMajor, toolMinor, size;
+        switch (mCalibration.sizeCalibration) {
+        case Calibration::SIZE_CALIBRATION_GEOMETRIC:
+        case Calibration::SIZE_CALIBRATION_DIAMETER:
+        case Calibration::SIZE_CALIBRATION_BOX:
+        case Calibration::SIZE_CALIBRATION_AREA:
+            if (mRawPointerAxes.touchMajor.valid && mRawPointerAxes.toolMajor.valid) {
+                touchMajor = in.touchMajor;
+                touchMinor = mRawPointerAxes.touchMinor.valid ? in.touchMinor : in.touchMajor;
+                toolMajor = in.toolMajor;
+                toolMinor = mRawPointerAxes.toolMinor.valid ? in.toolMinor : in.toolMajor;
+                size = mRawPointerAxes.touchMinor.valid
+                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
+            } else if (mRawPointerAxes.touchMajor.valid) {
+                toolMajor = touchMajor = in.touchMajor;
+                toolMinor = touchMinor = mRawPointerAxes.touchMinor.valid
+                        ? in.touchMinor : in.touchMajor;
+                size = mRawPointerAxes.touchMinor.valid
+                        ? avg(in.touchMajor, in.touchMinor) : in.touchMajor;
+            } else if (mRawPointerAxes.toolMajor.valid) {
+                touchMajor = toolMajor = in.toolMajor;
+                touchMinor = toolMinor = mRawPointerAxes.toolMinor.valid
+                        ? in.toolMinor : in.toolMajor;
+                size = mRawPointerAxes.toolMinor.valid
+                        ? avg(in.toolMajor, in.toolMinor) : in.toolMajor;
+            } else {
+                ALOG_ASSERT(false, "No touch or tool axes.  "
+                        "Size calibration should have been resolved to NONE.");
+                touchMajor = 0;
+                touchMinor = 0;
+                toolMajor = 0;
+                toolMinor = 0;
+                size = 0;
+            }
+
+            if (mCalibration.haveSizeIsSummed && mCalibration.sizeIsSummed) {
+                uint32_t touchingCount = mCurrentRawPointerData.touchingIdBits.count();
+                if (touchingCount > 1) {
+                    touchMajor /= touchingCount;
+                    touchMinor /= touchingCount;
+                    toolMajor /= touchingCount;
+                    toolMinor /= touchingCount;
+                    size /= touchingCount;
+                }
+            }
+
+            if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_GEOMETRIC) {
+                touchMajor *= mGeometricScale;
+                touchMinor *= mGeometricScale;
+                toolMajor *= mGeometricScale;
+                toolMinor *= mGeometricScale;
+            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_AREA) {
+                touchMajor = touchMajor > 0 ? sqrtf(touchMajor) : 0;
+                touchMinor = touchMajor;
+                toolMajor = toolMajor > 0 ? sqrtf(toolMajor) : 0;
+                toolMinor = toolMajor;
+            } else if (mCalibration.sizeCalibration == Calibration::SIZE_CALIBRATION_DIAMETER) {
+                touchMinor = touchMajor;
+                toolMinor = toolMajor;
+            }
+
+            mCalibration.applySizeScaleAndBias(&touchMajor);
+            mCalibration.applySizeScaleAndBias(&touchMinor);
+            mCalibration.applySizeScaleAndBias(&toolMajor);
+            mCalibration.applySizeScaleAndBias(&toolMinor);
+            size *= mSizeScale;
+            break;
+        default:
+            touchMajor = 0;
+            touchMinor = 0;
+            toolMajor = 0;
+            toolMinor = 0;
+            size = 0;
+            break;
+        }
+
+        // Pressure
+        float pressure;
+        switch (mCalibration.pressureCalibration) {
+        case Calibration::PRESSURE_CALIBRATION_PHYSICAL:
+        case Calibration::PRESSURE_CALIBRATION_AMPLITUDE:
+            pressure = in.pressure * mPressureScale;
+            break;
+        default:
+            pressure = in.isHovering ? 0 : 1;
+            break;
+        }
+
+        // Tilt and Orientation
+        float tilt;
+        float orientation;
+        if (mHaveTilt) {
+            float tiltXAngle = (in.tiltX - mTiltXCenter) * mTiltXScale;
+            float tiltYAngle = (in.tiltY - mTiltYCenter) * mTiltYScale;
+            orientation = atan2f(-sinf(tiltXAngle), sinf(tiltYAngle));
+            tilt = acosf(cosf(tiltXAngle) * cosf(tiltYAngle));
+        } else {
+            tilt = 0;
+
+            switch (mCalibration.orientationCalibration) {
+            case Calibration::ORIENTATION_CALIBRATION_INTERPOLATED:
+                orientation = in.orientation * mOrientationScale;
+                break;
+            case Calibration::ORIENTATION_CALIBRATION_VECTOR: {
+                int32_t c1 = signExtendNybble((in.orientation & 0xf0) >> 4);
+                int32_t c2 = signExtendNybble(in.orientation & 0x0f);
+                if (c1 != 0 || c2 != 0) {
+                    orientation = atan2f(c1, c2) * 0.5f;
+                    float confidence = hypotf(c1, c2);
+                    float scale = 1.0f + confidence / 16.0f;
+                    touchMajor *= scale;
+                    touchMinor /= scale;
+                    toolMajor *= scale;
+                    toolMinor /= scale;
+                } else {
+                    orientation = 0;
+                }
+                break;
+            }
+            default:
+                orientation = 0;
+            }
+        }
+
+        // Distance
+        float distance;
+        switch (mCalibration.distanceCalibration) {
+        case Calibration::DISTANCE_CALIBRATION_SCALED:
+            distance = in.distance * mDistanceScale;
+            break;
+        default:
+            distance = 0;
+        }
+
+        // Coverage
+        int32_t rawLeft, rawTop, rawRight, rawBottom;
+        switch (mCalibration.coverageCalibration) {
+        case Calibration::COVERAGE_CALIBRATION_BOX:
+            rawLeft = (in.toolMinor & 0xffff0000) >> 16;
+            rawRight = in.toolMinor & 0x0000ffff;
+            rawBottom = in.toolMajor & 0x0000ffff;
+            rawTop = (in.toolMajor & 0xffff0000) >> 16;
+            break;
+        default:
+            rawLeft = rawTop = rawRight = rawBottom = 0;
+            break;
+        }
+
+        // X, Y, and the bounding box for coverage information
+        // Adjust coords for surface orientation.
+        float x, y, left, top, right, bottom;
+        switch (mSurfaceOrientation) {
+        case DISPLAY_ORIENTATION_90:
+            x = float(in.y - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            y = float(mRawPointerAxes.x.maxValue - in.x) * mXScale + mXTranslate;
+            left = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            right = float(rawBottom- mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            bottom = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
+            top = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
+            orientation -= M_PI_2;
+            if (orientation < mOrientedRanges.orientation.min) {
+                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
+            }
+            break;
+        case DISPLAY_ORIENTATION_180:
+            x = float(mRawPointerAxes.x.maxValue - in.x) * mXScale + mXTranslate;
+            y = float(mRawPointerAxes.y.maxValue - in.y) * mYScale + mYTranslate;
+            left = float(mRawPointerAxes.x.maxValue - rawRight) * mXScale + mXTranslate;
+            right = float(mRawPointerAxes.x.maxValue - rawLeft) * mXScale + mXTranslate;
+            bottom = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
+            top = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
+            orientation -= M_PI;
+            if (orientation < mOrientedRanges.orientation.min) {
+                orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
+            }
+            break;
+        case DISPLAY_ORIENTATION_270:
+            x = float(mRawPointerAxes.y.maxValue - in.y) * mYScale + mYTranslate;
+            y = float(in.x - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            left = float(mRawPointerAxes.y.maxValue - rawBottom) * mYScale + mYTranslate;
+            right = float(mRawPointerAxes.y.maxValue - rawTop) * mYScale + mYTranslate;
+            bottom = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            top = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            orientation += M_PI_2;
+            if (orientation > mOrientedRanges.orientation.max) {
+                orientation -= (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
+            }
+            break;
+        default:
+            x = float(in.x - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            y = float(in.y - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            left = float(rawLeft - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            right = float(rawRight - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
+            bottom = float(rawBottom - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            top = float(rawTop - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
+            break;
+        }
+
+        // Write output coords.
+        PointerCoords& out = mCurrentCookedPointerData.pointerCoords[i];
+        out.clear();
+        out.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        out.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        out.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, pressure);
+        out.setAxisValue(AMOTION_EVENT_AXIS_SIZE, size);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MAJOR, touchMajor);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR, touchMinor);
+        out.setAxisValue(AMOTION_EVENT_AXIS_ORIENTATION, orientation);
+        out.setAxisValue(AMOTION_EVENT_AXIS_TILT, tilt);
+        out.setAxisValue(AMOTION_EVENT_AXIS_DISTANCE, distance);
+        if (mCalibration.coverageCalibration == Calibration::COVERAGE_CALIBRATION_BOX) {
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_1, left);
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_2, top);
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_3, right);
+            out.setAxisValue(AMOTION_EVENT_AXIS_GENERIC_4, bottom);
+        } else {
+            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR, toolMajor);
+            out.setAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR, toolMinor);
+        }
+
+        // Write output properties.
+        PointerProperties& properties = mCurrentCookedPointerData.pointerProperties[i];
+        uint32_t id = in.id;
+        properties.clear();
+        properties.id = id;
+        properties.toolType = in.toolType;
+
+        // Write id index.
+        mCurrentCookedPointerData.idToIndex[id] = i;
+    }
+}
+
+void TouchInputMapper::dispatchPointerUsage(nsecs_t when, uint32_t policyFlags,
+        PointerUsage pointerUsage) {
+    if (pointerUsage != mPointerUsage) {
+        abortPointerUsage(when, policyFlags);
+        mPointerUsage = pointerUsage;
+    }
+
+    switch (mPointerUsage) {
+    case POINTER_USAGE_GESTURES:
+        dispatchPointerGestures(when, policyFlags, false /*isTimeout*/);
+        break;
+    case POINTER_USAGE_STYLUS:
+        dispatchPointerStylus(when, policyFlags);
+        break;
+    case POINTER_USAGE_MOUSE:
+        dispatchPointerMouse(when, policyFlags);
+        break;
+    default:
+        break;
+    }
+}
+
+void TouchInputMapper::abortPointerUsage(nsecs_t when, uint32_t policyFlags) {
+    switch (mPointerUsage) {
+    case POINTER_USAGE_GESTURES:
+        abortPointerGestures(when, policyFlags);
+        break;
+    case POINTER_USAGE_STYLUS:
+        abortPointerStylus(when, policyFlags);
+        break;
+    case POINTER_USAGE_MOUSE:
+        abortPointerMouse(when, policyFlags);
+        break;
+    default:
+        break;
+    }
+
+    mPointerUsage = POINTER_USAGE_NONE;
+}
+
+void TouchInputMapper::dispatchPointerGestures(nsecs_t when, uint32_t policyFlags,
+        bool isTimeout) {
+    // Update current gesture coordinates.
+    bool cancelPreviousGesture, finishPreviousGesture;
+    bool sendEvents = preparePointerGestures(when,
+            &cancelPreviousGesture, &finishPreviousGesture, isTimeout);
+    if (!sendEvents) {
+        return;
+    }
+    if (finishPreviousGesture) {
+        cancelPreviousGesture = false;
+    }
+
+    // Update the pointer presentation and spots.
+    if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
+        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_SPOT);
+        if (finishPreviousGesture || cancelPreviousGesture) {
+            mPointerController->clearSpots();
+        }
+        mPointerController->setSpots(mPointerGesture.currentGestureCoords,
+                mPointerGesture.currentGestureIdToIndex,
+                mPointerGesture.currentGestureIdBits);
+    } else {
+        mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
+    }
+
+    // Show or hide the pointer if needed.
+    switch (mPointerGesture.currentGestureMode) {
+    case PointerGesture::NEUTRAL:
+    case PointerGesture::QUIET:
+        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS
+                && (mPointerGesture.lastGestureMode == PointerGesture::SWIPE
+                        || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)) {
+            // Remind the user of where the pointer is after finishing a gesture with spots.
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_GRADUAL);
+        }
+        break;
+    case PointerGesture::TAP:
+    case PointerGesture::TAP_DRAG:
+    case PointerGesture::BUTTON_CLICK_OR_DRAG:
+    case PointerGesture::HOVER:
+    case PointerGesture::PRESS:
+        // Unfade the pointer when the current gesture manipulates the
+        // area directly under the pointer.
+        mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        break;
+    case PointerGesture::SWIPE:
+    case PointerGesture::FREEFORM:
+        // Fade the pointer when the current gesture manipulates a different
+        // area and there are spots to guide the user experience.
+        if (mParameters.gestureMode == Parameters::GESTURE_MODE_SPOTS) {
+            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        } else {
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        }
+        break;
+    }
+
+    // Send events!
+    int32_t metaState = getContext()->getGlobalMetaState();
+    int32_t buttonState = mCurrentButtonState;
+
+    // Update last coordinates of pointers that have moved so that we observe the new
+    // pointer positions at the same time as other pointers that have just gone up.
+    bool down = mPointerGesture.currentGestureMode == PointerGesture::TAP
+            || mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG
+            || mPointerGesture.currentGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
+            || mPointerGesture.currentGestureMode == PointerGesture::PRESS
+            || mPointerGesture.currentGestureMode == PointerGesture::SWIPE
+            || mPointerGesture.currentGestureMode == PointerGesture::FREEFORM;
+    bool moveNeeded = false;
+    if (down && !cancelPreviousGesture && !finishPreviousGesture
+            && !mPointerGesture.lastGestureIdBits.isEmpty()
+            && !mPointerGesture.currentGestureIdBits.isEmpty()) {
+        BitSet32 movedGestureIdBits(mPointerGesture.currentGestureIdBits.value
+                & mPointerGesture.lastGestureIdBits.value);
+        moveNeeded = updateMovedPointers(mPointerGesture.currentGestureProperties,
+                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                mPointerGesture.lastGestureProperties,
+                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                movedGestureIdBits);
+        if (buttonState != mLastButtonState) {
+            moveNeeded = true;
+        }
+    }
+
+    // Send motion events for all pointers that went up or were canceled.
+    BitSet32 dispatchedGestureIdBits(mPointerGesture.lastGestureIdBits);
+    if (!dispatchedGestureIdBits.isEmpty()) {
+        if (cancelPreviousGesture) {
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                    AMOTION_EVENT_EDGE_FLAG_NONE,
+                    mPointerGesture.lastGestureProperties,
+                    mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                    dispatchedGestureIdBits, -1,
+                    0, 0, mPointerGesture.downTime);
+
+            dispatchedGestureIdBits.clear();
+        } else {
+            BitSet32 upGestureIdBits;
+            if (finishPreviousGesture) {
+                upGestureIdBits = dispatchedGestureIdBits;
+            } else {
+                upGestureIdBits.value = dispatchedGestureIdBits.value
+                        & ~mPointerGesture.currentGestureIdBits.value;
+            }
+            while (!upGestureIdBits.isEmpty()) {
+                uint32_t id = upGestureIdBits.clearFirstMarkedBit();
+
+                dispatchMotion(when, policyFlags, mSource,
+                        AMOTION_EVENT_ACTION_POINTER_UP, 0,
+                        metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                        mPointerGesture.lastGestureProperties,
+                        mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                        dispatchedGestureIdBits, id,
+                        0, 0, mPointerGesture.downTime);
+
+                dispatchedGestureIdBits.clearBit(id);
+            }
+        }
+    }
+
+    // Send motion events for all pointers that moved.
+    if (moveNeeded) {
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                mPointerGesture.currentGestureProperties,
+                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                dispatchedGestureIdBits, -1,
+                0, 0, mPointerGesture.downTime);
+    }
+
+    // Send motion events for all pointers that went down.
+    if (down) {
+        BitSet32 downGestureIdBits(mPointerGesture.currentGestureIdBits.value
+                & ~dispatchedGestureIdBits.value);
+        while (!downGestureIdBits.isEmpty()) {
+            uint32_t id = downGestureIdBits.clearFirstMarkedBit();
+            dispatchedGestureIdBits.markBit(id);
+
+            if (dispatchedGestureIdBits.count() == 1) {
+                mPointerGesture.downTime = when;
+            }
+
+            dispatchMotion(when, policyFlags, mSource,
+                    AMOTION_EVENT_ACTION_POINTER_DOWN, 0, metaState, buttonState, 0,
+                    mPointerGesture.currentGestureProperties,
+                    mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                    dispatchedGestureIdBits, id,
+                    0, 0, mPointerGesture.downTime);
+        }
+    }
+
+    // Send motion events for hover.
+    if (mPointerGesture.currentGestureMode == PointerGesture::HOVER) {
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                mPointerGesture.currentGestureProperties,
+                mPointerGesture.currentGestureCoords, mPointerGesture.currentGestureIdToIndex,
+                mPointerGesture.currentGestureIdBits, -1,
+                0, 0, mPointerGesture.downTime);
+    } else if (dispatchedGestureIdBits.isEmpty()
+            && !mPointerGesture.lastGestureIdBits.isEmpty()) {
+        // Synthesize a hover move event after all pointers go up to indicate that
+        // the pointer is hovering again even if the user is not currently touching
+        // the touch pad.  This ensures that a view will receive a fresh hover enter
+        // event after a tap.
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+
+        PointerProperties pointerProperties;
+        pointerProperties.clear();
+        pointerProperties.id = 0;
+        pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+
+        PointerCoords pointerCoords;
+        pointerCoords.clear();
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0,
+                metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+                mViewport.displayId, 1, &pointerProperties, &pointerCoords,
+                0, 0, mPointerGesture.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    // Update state.
+    mPointerGesture.lastGestureMode = mPointerGesture.currentGestureMode;
+    if (!down) {
+        mPointerGesture.lastGestureIdBits.clear();
+    } else {
+        mPointerGesture.lastGestureIdBits = mPointerGesture.currentGestureIdBits;
+        for (BitSet32 idBits(mPointerGesture.currentGestureIdBits); !idBits.isEmpty(); ) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
+            mPointerGesture.lastGestureProperties[index].copyFrom(
+                    mPointerGesture.currentGestureProperties[index]);
+            mPointerGesture.lastGestureCoords[index].copyFrom(
+                    mPointerGesture.currentGestureCoords[index]);
+            mPointerGesture.lastGestureIdToIndex[id] = index;
+        }
+    }
+}
+
+void TouchInputMapper::abortPointerGestures(nsecs_t when, uint32_t policyFlags) {
+    // Cancel previously dispatches pointers.
+    if (!mPointerGesture.lastGestureIdBits.isEmpty()) {
+        int32_t metaState = getContext()->getGlobalMetaState();
+        int32_t buttonState = mCurrentButtonState;
+        dispatchMotion(when, policyFlags, mSource,
+                AMOTION_EVENT_ACTION_CANCEL, 0, metaState, buttonState,
+                AMOTION_EVENT_EDGE_FLAG_NONE,
+                mPointerGesture.lastGestureProperties,
+                mPointerGesture.lastGestureCoords, mPointerGesture.lastGestureIdToIndex,
+                mPointerGesture.lastGestureIdBits, -1,
+                0, 0, mPointerGesture.downTime);
+    }
+
+    // Reset the current pointer gesture.
+    mPointerGesture.reset();
+    mPointerVelocityControl.reset();
+
+    // Remove any current spots.
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        mPointerController->clearSpots();
+    }
+}
+
+bool TouchInputMapper::preparePointerGestures(nsecs_t when,
+        bool* outCancelPreviousGesture, bool* outFinishPreviousGesture, bool isTimeout) {
+    *outCancelPreviousGesture = false;
+    *outFinishPreviousGesture = false;
+
+    // Handle TAP timeout.
+    if (isTimeout) {
+#if DEBUG_GESTURES
+        ALOGD("Gestures: Processing timeout");
+#endif
+
+        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
+            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
+                // The tap/drag timeout has not yet expired.
+                getContext()->requestTimeoutAtTime(mPointerGesture.tapUpTime
+                        + mConfig.pointerGestureTapDragInterval);
+            } else {
+                // The tap is finished.
+#if DEBUG_GESTURES
+                ALOGD("Gestures: TAP finished");
+#endif
+                *outFinishPreviousGesture = true;
+
+                mPointerGesture.activeGestureId = -1;
+                mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
+                mPointerGesture.currentGestureIdBits.clear();
+
+                mPointerVelocityControl.reset();
+                return true;
+            }
+        }
+
+        // We did not handle this timeout.
+        return false;
+    }
+
+    const uint32_t currentFingerCount = mCurrentFingerIdBits.count();
+    const uint32_t lastFingerCount = mLastFingerIdBits.count();
+
+    // Update the velocity tracker.
+    {
+        VelocityTracker::Position positions[MAX_POINTERS];
+        uint32_t count = 0;
+        for (BitSet32 idBits(mCurrentFingerIdBits); !idBits.isEmpty(); count++) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            const RawPointerData::Pointer& pointer = mCurrentRawPointerData.pointerForId(id);
+            positions[count].x = pointer.x * mPointerXMovementScale;
+            positions[count].y = pointer.y * mPointerYMovementScale;
+        }
+        mPointerGesture.velocityTracker.addMovement(when,
+                mCurrentFingerIdBits, positions);
+    }
+
+    // If the gesture ever enters a mode other than TAP, HOVER or TAP_DRAG, without first returning
+    // to NEUTRAL, then we should not generate tap event.
+    if (mPointerGesture.lastGestureMode != PointerGesture::HOVER
+            && mPointerGesture.lastGestureMode != PointerGesture::TAP
+            && mPointerGesture.lastGestureMode != PointerGesture::TAP_DRAG) {
+        mPointerGesture.resetTap();
+    }
+
+    // Pick a new active touch id if needed.
+    // Choose an arbitrary pointer that just went down, if there is one.
+    // Otherwise choose an arbitrary remaining pointer.
+    // This guarantees we always have an active touch id when there is at least one pointer.
+    // We keep the same active touch id for as long as possible.
+    bool activeTouchChanged = false;
+    int32_t lastActiveTouchId = mPointerGesture.activeTouchId;
+    int32_t activeTouchId = lastActiveTouchId;
+    if (activeTouchId < 0) {
+        if (!mCurrentFingerIdBits.isEmpty()) {
+            activeTouchChanged = true;
+            activeTouchId = mPointerGesture.activeTouchId =
+                    mCurrentFingerIdBits.firstMarkedBit();
+            mPointerGesture.firstTouchTime = when;
+        }
+    } else if (!mCurrentFingerIdBits.hasBit(activeTouchId)) {
+        activeTouchChanged = true;
+        if (!mCurrentFingerIdBits.isEmpty()) {
+            activeTouchId = mPointerGesture.activeTouchId =
+                    mCurrentFingerIdBits.firstMarkedBit();
+        } else {
+            activeTouchId = mPointerGesture.activeTouchId = -1;
+        }
+    }
+
+    // Determine whether we are in quiet time.
+    bool isQuietTime = false;
+    if (activeTouchId < 0) {
+        mPointerGesture.resetQuietTime();
+    } else {
+        isQuietTime = when < mPointerGesture.quietTime + mConfig.pointerGestureQuietInterval;
+        if (!isQuietTime) {
+            if ((mPointerGesture.lastGestureMode == PointerGesture::PRESS
+                    || mPointerGesture.lastGestureMode == PointerGesture::SWIPE
+                    || mPointerGesture.lastGestureMode == PointerGesture::FREEFORM)
+                    && currentFingerCount < 2) {
+                // Enter quiet time when exiting swipe or freeform state.
+                // This is to prevent accidentally entering the hover state and flinging the
+                // pointer when finishing a swipe and there is still one pointer left onscreen.
+                isQuietTime = true;
+            } else if (mPointerGesture.lastGestureMode == PointerGesture::BUTTON_CLICK_OR_DRAG
+                    && currentFingerCount >= 2
+                    && !isPointerDown(mCurrentButtonState)) {
+                // Enter quiet time when releasing the button and there are still two or more
+                // fingers down.  This may indicate that one finger was used to press the button
+                // but it has not gone up yet.
+                isQuietTime = true;
+            }
+            if (isQuietTime) {
+                mPointerGesture.quietTime = when;
+            }
+        }
+    }
+
+    // Switch states based on button and pointer state.
+    if (isQuietTime) {
+        // Case 1: Quiet time. (QUIET)
+#if DEBUG_GESTURES
+        ALOGD("Gestures: QUIET for next %0.3fms", (mPointerGesture.quietTime
+                + mConfig.pointerGestureQuietInterval - when) * 0.000001f);
+#endif
+        if (mPointerGesture.lastGestureMode != PointerGesture::QUIET) {
+            *outFinishPreviousGesture = true;
+        }
+
+        mPointerGesture.activeGestureId = -1;
+        mPointerGesture.currentGestureMode = PointerGesture::QUIET;
+        mPointerGesture.currentGestureIdBits.clear();
+
+        mPointerVelocityControl.reset();
+    } else if (isPointerDown(mCurrentButtonState)) {
+        // Case 2: Button is pressed. (BUTTON_CLICK_OR_DRAG)
+        // The pointer follows the active touch point.
+        // Emit DOWN, MOVE, UP events at the pointer location.
+        //
+        // Only the active touch matters; other fingers are ignored.  This policy helps
+        // to handle the case where the user places a second finger on the touch pad
+        // to apply the necessary force to depress an integrated button below the surface.
+        // We don't want the second finger to be delivered to applications.
+        //
+        // For this to work well, we need to make sure to track the pointer that is really
+        // active.  If the user first puts one finger down to click then adds another
+        // finger to drag then the active pointer should switch to the finger that is
+        // being dragged.
+#if DEBUG_GESTURES
+        ALOGD("Gestures: BUTTON_CLICK_OR_DRAG activeTouchId=%d, "
+                "currentFingerCount=%d", activeTouchId, currentFingerCount);
+#endif
+        // Reset state when just starting.
+        if (mPointerGesture.lastGestureMode != PointerGesture::BUTTON_CLICK_OR_DRAG) {
+            *outFinishPreviousGesture = true;
+            mPointerGesture.activeGestureId = 0;
+        }
+
+        // Switch pointers if needed.
+        // Find the fastest pointer and follow it.
+        if (activeTouchId >= 0 && currentFingerCount > 1) {
+            int32_t bestId = -1;
+            float bestSpeed = mConfig.pointerGestureDragMinSwitchSpeed;
+            for (BitSet32 idBits(mCurrentFingerIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                float vx, vy;
+                if (mPointerGesture.velocityTracker.getVelocity(id, &vx, &vy)) {
+                    float speed = hypotf(vx, vy);
+                    if (speed > bestSpeed) {
+                        bestId = id;
+                        bestSpeed = speed;
+                    }
+                }
+            }
+            if (bestId >= 0 && bestId != activeTouchId) {
+                mPointerGesture.activeTouchId = activeTouchId = bestId;
+                activeTouchChanged = true;
+#if DEBUG_GESTURES
+                ALOGD("Gestures: BUTTON_CLICK_OR_DRAG switched pointers, "
+                        "bestId=%d, bestSpeed=%0.3f", bestId, bestSpeed);
+#endif
+            }
+        }
+
+        if (activeTouchId >= 0 && mLastFingerIdBits.hasBit(activeTouchId)) {
+            const RawPointerData::Pointer& currentPointer =
+                    mCurrentRawPointerData.pointerForId(activeTouchId);
+            const RawPointerData::Pointer& lastPointer =
+                    mLastRawPointerData.pointerForId(activeTouchId);
+            float deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
+            float deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+            mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+            // Move the pointer using a relative motion.
+            // When using spots, the click will occur at the position of the anchor
+            // spot and all other spots will move there.
+            mPointerController->move(deltaX, deltaY);
+        } else {
+            mPointerVelocityControl.reset();
+        }
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+
+        mPointerGesture.currentGestureMode = PointerGesture::BUTTON_CLICK_OR_DRAG;
+        mPointerGesture.currentGestureIdBits.clear();
+        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
+        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
+        mPointerGesture.currentGestureProperties[0].clear();
+        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
+        mPointerGesture.currentGestureProperties[0].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+        mPointerGesture.currentGestureCoords[0].clear();
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+    } else if (currentFingerCount == 0) {
+        // Case 3. No fingers down and button is not pressed. (NEUTRAL)
+        if (mPointerGesture.lastGestureMode != PointerGesture::NEUTRAL) {
+            *outFinishPreviousGesture = true;
+        }
+
+        // Watch for taps coming out of HOVER or TAP_DRAG mode.
+        // Checking for taps after TAP_DRAG allows us to detect double-taps.
+        bool tapped = false;
+        if ((mPointerGesture.lastGestureMode == PointerGesture::HOVER
+                || mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG)
+                && lastFingerCount == 1) {
+            if (when <= mPointerGesture.tapDownTime + mConfig.pointerGestureTapInterval) {
+                float x, y;
+                mPointerController->getPosition(&x, &y);
+                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
+                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: TAP");
+#endif
+
+                    mPointerGesture.tapUpTime = when;
+                    getContext()->requestTimeoutAtTime(when
+                            + mConfig.pointerGestureTapDragInterval);
+
+                    mPointerGesture.activeGestureId = 0;
+                    mPointerGesture.currentGestureMode = PointerGesture::TAP;
+                    mPointerGesture.currentGestureIdBits.clear();
+                    mPointerGesture.currentGestureIdBits.markBit(
+                            mPointerGesture.activeGestureId);
+                    mPointerGesture.currentGestureIdToIndex[
+                            mPointerGesture.activeGestureId] = 0;
+                    mPointerGesture.currentGestureProperties[0].clear();
+                    mPointerGesture.currentGestureProperties[0].id =
+                            mPointerGesture.activeGestureId;
+                    mPointerGesture.currentGestureProperties[0].toolType =
+                            AMOTION_EVENT_TOOL_TYPE_FINGER;
+                    mPointerGesture.currentGestureCoords[0].clear();
+                    mPointerGesture.currentGestureCoords[0].setAxisValue(
+                            AMOTION_EVENT_AXIS_X, mPointerGesture.tapX);
+                    mPointerGesture.currentGestureCoords[0].setAxisValue(
+                            AMOTION_EVENT_AXIS_Y, mPointerGesture.tapY);
+                    mPointerGesture.currentGestureCoords[0].setAxisValue(
+                            AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+
+                    tapped = true;
+                } else {
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: Not a TAP, deltaX=%f, deltaY=%f",
+                            x - mPointerGesture.tapX,
+                            y - mPointerGesture.tapY);
+#endif
+                }
+            } else {
+#if DEBUG_GESTURES
+                if (mPointerGesture.tapDownTime != LLONG_MIN) {
+                    ALOGD("Gestures: Not a TAP, %0.3fms since down",
+                            (when - mPointerGesture.tapDownTime) * 0.000001f);
+                } else {
+                    ALOGD("Gestures: Not a TAP, incompatible mode transitions");
+                }
+#endif
+            }
+        }
+
+        mPointerVelocityControl.reset();
+
+        if (!tapped) {
+#if DEBUG_GESTURES
+            ALOGD("Gestures: NEUTRAL");
+#endif
+            mPointerGesture.activeGestureId = -1;
+            mPointerGesture.currentGestureMode = PointerGesture::NEUTRAL;
+            mPointerGesture.currentGestureIdBits.clear();
+        }
+    } else if (currentFingerCount == 1) {
+        // Case 4. Exactly one finger down, button is not pressed. (HOVER or TAP_DRAG)
+        // The pointer follows the active touch point.
+        // When in HOVER, emit HOVER_MOVE events at the pointer location.
+        // When in TAP_DRAG, emit MOVE events at the pointer location.
+        ALOG_ASSERT(activeTouchId >= 0);
+
+        mPointerGesture.currentGestureMode = PointerGesture::HOVER;
+        if (mPointerGesture.lastGestureMode == PointerGesture::TAP) {
+            if (when <= mPointerGesture.tapUpTime + mConfig.pointerGestureTapDragInterval) {
+                float x, y;
+                mPointerController->getPosition(&x, &y);
+                if (fabs(x - mPointerGesture.tapX) <= mConfig.pointerGestureTapSlop
+                        && fabs(y - mPointerGesture.tapY) <= mConfig.pointerGestureTapSlop) {
+                    mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
+                } else {
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: Not a TAP_DRAG, deltaX=%f, deltaY=%f",
+                            x - mPointerGesture.tapX,
+                            y - mPointerGesture.tapY);
+#endif
+                }
+            } else {
+#if DEBUG_GESTURES
+                ALOGD("Gestures: Not a TAP_DRAG, %0.3fms time since up",
+                        (when - mPointerGesture.tapUpTime) * 0.000001f);
+#endif
+            }
+        } else if (mPointerGesture.lastGestureMode == PointerGesture::TAP_DRAG) {
+            mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
+        }
+
+        if (mLastFingerIdBits.hasBit(activeTouchId)) {
+            const RawPointerData::Pointer& currentPointer =
+                    mCurrentRawPointerData.pointerForId(activeTouchId);
+            const RawPointerData::Pointer& lastPointer =
+                    mLastRawPointerData.pointerForId(activeTouchId);
+            float deltaX = (currentPointer.x - lastPointer.x)
+                    * mPointerXMovementScale;
+            float deltaY = (currentPointer.y - lastPointer.y)
+                    * mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+            mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+            // Move the pointer using a relative motion.
+            // When using spots, the hover or drag will occur at the position of the anchor spot.
+            mPointerController->move(deltaX, deltaY);
+        } else {
+            mPointerVelocityControl.reset();
+        }
+
+        bool down;
+        if (mPointerGesture.currentGestureMode == PointerGesture::TAP_DRAG) {
+#if DEBUG_GESTURES
+            ALOGD("Gestures: TAP_DRAG");
+#endif
+            down = true;
+        } else {
+#if DEBUG_GESTURES
+            ALOGD("Gestures: HOVER");
+#endif
+            if (mPointerGesture.lastGestureMode != PointerGesture::HOVER) {
+                *outFinishPreviousGesture = true;
+            }
+            mPointerGesture.activeGestureId = 0;
+            down = false;
+        }
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+
+        mPointerGesture.currentGestureIdBits.clear();
+        mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
+        mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
+        mPointerGesture.currentGestureProperties[0].clear();
+        mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
+        mPointerGesture.currentGestureProperties[0].toolType =
+                AMOTION_EVENT_TOOL_TYPE_FINGER;
+        mPointerGesture.currentGestureCoords[0].clear();
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
+                down ? 1.0f : 0.0f);
+
+        if (lastFingerCount == 0 && currentFingerCount != 0) {
+            mPointerGesture.resetTap();
+            mPointerGesture.tapDownTime = when;
+            mPointerGesture.tapX = x;
+            mPointerGesture.tapY = y;
+        }
+    } else {
+        // Case 5. At least two fingers down, button is not pressed. (PRESS, SWIPE or FREEFORM)
+        // We need to provide feedback for each finger that goes down so we cannot wait
+        // for the fingers to move before deciding what to do.
+        //
+        // The ambiguous case is deciding what to do when there are two fingers down but they
+        // have not moved enough to determine whether they are part of a drag or part of a
+        // freeform gesture, or just a press or long-press at the pointer location.
+        //
+        // When there are two fingers we start with the PRESS hypothesis and we generate a
+        // down at the pointer location.
+        //
+        // When the two fingers move enough or when additional fingers are added, we make
+        // a decision to transition into SWIPE or FREEFORM mode accordingly.
+        ALOG_ASSERT(activeTouchId >= 0);
+
+        bool settled = when >= mPointerGesture.firstTouchTime
+                + mConfig.pointerGestureMultitouchSettleInterval;
+        if (mPointerGesture.lastGestureMode != PointerGesture::PRESS
+                && mPointerGesture.lastGestureMode != PointerGesture::SWIPE
+                && mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
+            *outFinishPreviousGesture = true;
+        } else if (!settled && currentFingerCount > lastFingerCount) {
+            // Additional pointers have gone down but not yet settled.
+            // Reset the gesture.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: Resetting gesture since additional pointers went down for MULTITOUCH, "
+                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
+                            + mConfig.pointerGestureMultitouchSettleInterval - when)
+                            * 0.000001f);
+#endif
+            *outCancelPreviousGesture = true;
+        } else {
+            // Continue previous gesture.
+            mPointerGesture.currentGestureMode = mPointerGesture.lastGestureMode;
+        }
+
+        if (*outFinishPreviousGesture || *outCancelPreviousGesture) {
+            mPointerGesture.currentGestureMode = PointerGesture::PRESS;
+            mPointerGesture.activeGestureId = 0;
+            mPointerGesture.referenceIdBits.clear();
+            mPointerVelocityControl.reset();
+
+            // Use the centroid and pointer location as the reference points for the gesture.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: Using centroid as reference for MULTITOUCH, "
+                    "settle time remaining %0.3fms", (mPointerGesture.firstTouchTime
+                            + mConfig.pointerGestureMultitouchSettleInterval - when)
+                            * 0.000001f);
+#endif
+            mCurrentRawPointerData.getCentroidOfTouchingPointers(
+                    &mPointerGesture.referenceTouchX,
+                    &mPointerGesture.referenceTouchY);
+            mPointerController->getPosition(&mPointerGesture.referenceGestureX,
+                    &mPointerGesture.referenceGestureY);
+        }
+
+        // Clear the reference deltas for fingers not yet included in the reference calculation.
+        for (BitSet32 idBits(mCurrentFingerIdBits.value
+                & ~mPointerGesture.referenceIdBits.value); !idBits.isEmpty(); ) {
+            uint32_t id = idBits.clearFirstMarkedBit();
+            mPointerGesture.referenceDeltas[id].dx = 0;
+            mPointerGesture.referenceDeltas[id].dy = 0;
+        }
+        mPointerGesture.referenceIdBits = mCurrentFingerIdBits;
+
+        // Add delta for all fingers and calculate a common movement delta.
+        float commonDeltaX = 0, commonDeltaY = 0;
+        BitSet32 commonIdBits(mLastFingerIdBits.value
+                & mCurrentFingerIdBits.value);
+        for (BitSet32 idBits(commonIdBits); !idBits.isEmpty(); ) {
+            bool first = (idBits == commonIdBits);
+            uint32_t id = idBits.clearFirstMarkedBit();
+            const RawPointerData::Pointer& cpd = mCurrentRawPointerData.pointerForId(id);
+            const RawPointerData::Pointer& lpd = mLastRawPointerData.pointerForId(id);
+            PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
+            delta.dx += cpd.x - lpd.x;
+            delta.dy += cpd.y - lpd.y;
+
+            if (first) {
+                commonDeltaX = delta.dx;
+                commonDeltaY = delta.dy;
+            } else {
+                commonDeltaX = calculateCommonVector(commonDeltaX, delta.dx);
+                commonDeltaY = calculateCommonVector(commonDeltaY, delta.dy);
+            }
+        }
+
+        // Consider transitions from PRESS to SWIPE or MULTITOUCH.
+        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS) {
+            float dist[MAX_POINTER_ID + 1];
+            int32_t distOverThreshold = 0;
+            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
+                dist[id] = hypotf(delta.dx * mPointerXZoomScale,
+                        delta.dy * mPointerYZoomScale);
+                if (dist[id] > mConfig.pointerGestureMultitouchMinDistance) {
+                    distOverThreshold += 1;
+                }
+            }
+
+            // Only transition when at least two pointers have moved further than
+            // the minimum distance threshold.
+            if (distOverThreshold >= 2) {
+                if (currentFingerCount > 2) {
+                    // There are more than two pointers, switch to FREEFORM.
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: PRESS transitioned to FREEFORM, number of pointers %d > 2",
+                            currentFingerCount);
+#endif
+                    *outCancelPreviousGesture = true;
+                    mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+                } else {
+                    // There are exactly two pointers.
+                    BitSet32 idBits(mCurrentFingerIdBits);
+                    uint32_t id1 = idBits.clearFirstMarkedBit();
+                    uint32_t id2 = idBits.firstMarkedBit();
+                    const RawPointerData::Pointer& p1 = mCurrentRawPointerData.pointerForId(id1);
+                    const RawPointerData::Pointer& p2 = mCurrentRawPointerData.pointerForId(id2);
+                    float mutualDistance = distance(p1.x, p1.y, p2.x, p2.y);
+                    if (mutualDistance > mPointerGestureMaxSwipeWidth) {
+                        // There are two pointers but they are too far apart for a SWIPE,
+                        // switch to FREEFORM.
+#if DEBUG_GESTURES
+                        ALOGD("Gestures: PRESS transitioned to FREEFORM, distance %0.3f > %0.3f",
+                                mutualDistance, mPointerGestureMaxSwipeWidth);
+#endif
+                        *outCancelPreviousGesture = true;
+                        mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+                    } else {
+                        // There are two pointers.  Wait for both pointers to start moving
+                        // before deciding whether this is a SWIPE or FREEFORM gesture.
+                        float dist1 = dist[id1];
+                        float dist2 = dist[id2];
+                        if (dist1 >= mConfig.pointerGestureMultitouchMinDistance
+                                && dist2 >= mConfig.pointerGestureMultitouchMinDistance) {
+                            // Calculate the dot product of the displacement vectors.
+                            // When the vectors are oriented in approximately the same direction,
+                            // the angle betweeen them is near zero and the cosine of the angle
+                            // approches 1.0.  Recall that dot(v1, v2) = cos(angle) * mag(v1) * mag(v2).
+                            PointerGesture::Delta& delta1 = mPointerGesture.referenceDeltas[id1];
+                            PointerGesture::Delta& delta2 = mPointerGesture.referenceDeltas[id2];
+                            float dx1 = delta1.dx * mPointerXZoomScale;
+                            float dy1 = delta1.dy * mPointerYZoomScale;
+                            float dx2 = delta2.dx * mPointerXZoomScale;
+                            float dy2 = delta2.dy * mPointerYZoomScale;
+                            float dot = dx1 * dx2 + dy1 * dy2;
+                            float cosine = dot / (dist1 * dist2); // denominator always > 0
+                            if (cosine >= mConfig.pointerGestureSwipeTransitionAngleCosine) {
+                                // Pointers are moving in the same direction.  Switch to SWIPE.
+#if DEBUG_GESTURES
+                                ALOGD("Gestures: PRESS transitioned to SWIPE, "
+                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
+                                        "cosine %0.3f >= %0.3f",
+                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
+                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
+                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
+#endif
+                                mPointerGesture.currentGestureMode = PointerGesture::SWIPE;
+                            } else {
+                                // Pointers are moving in different directions.  Switch to FREEFORM.
+#if DEBUG_GESTURES
+                                ALOGD("Gestures: PRESS transitioned to FREEFORM, "
+                                        "dist1 %0.3f >= %0.3f, dist2 %0.3f >= %0.3f, "
+                                        "cosine %0.3f < %0.3f",
+                                        dist1, mConfig.pointerGestureMultitouchMinDistance,
+                                        dist2, mConfig.pointerGestureMultitouchMinDistance,
+                                        cosine, mConfig.pointerGestureSwipeTransitionAngleCosine);
+#endif
+                                *outCancelPreviousGesture = true;
+                                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+                            }
+                        }
+                    }
+                }
+            }
+        } else if (mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
+            // Switch from SWIPE to FREEFORM if additional pointers go down.
+            // Cancel previous gesture.
+            if (currentFingerCount > 2) {
+#if DEBUG_GESTURES
+                ALOGD("Gestures: SWIPE transitioned to FREEFORM, number of pointers %d > 2",
+                        currentFingerCount);
+#endif
+                *outCancelPreviousGesture = true;
+                mPointerGesture.currentGestureMode = PointerGesture::FREEFORM;
+            }
+        }
+
+        // Move the reference points based on the overall group motion of the fingers
+        // except in PRESS mode while waiting for a transition to occur.
+        if (mPointerGesture.currentGestureMode != PointerGesture::PRESS
+                && (commonDeltaX || commonDeltaY)) {
+            for (BitSet32 idBits(mPointerGesture.referenceIdBits); !idBits.isEmpty(); ) {
+                uint32_t id = idBits.clearFirstMarkedBit();
+                PointerGesture::Delta& delta = mPointerGesture.referenceDeltas[id];
+                delta.dx = 0;
+                delta.dy = 0;
+            }
+
+            mPointerGesture.referenceTouchX += commonDeltaX;
+            mPointerGesture.referenceTouchY += commonDeltaY;
+
+            commonDeltaX *= mPointerXMovementScale;
+            commonDeltaY *= mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &commonDeltaX, &commonDeltaY);
+            mPointerVelocityControl.move(when, &commonDeltaX, &commonDeltaY);
+
+            mPointerGesture.referenceGestureX += commonDeltaX;
+            mPointerGesture.referenceGestureY += commonDeltaY;
+        }
+
+        // Report gestures.
+        if (mPointerGesture.currentGestureMode == PointerGesture::PRESS
+                || mPointerGesture.currentGestureMode == PointerGesture::SWIPE) {
+            // PRESS or SWIPE mode.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: PRESS or SWIPE activeTouchId=%d,"
+                    "activeGestureId=%d, currentTouchPointerCount=%d",
+                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
+#endif
+            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
+
+            mPointerGesture.currentGestureIdBits.clear();
+            mPointerGesture.currentGestureIdBits.markBit(mPointerGesture.activeGestureId);
+            mPointerGesture.currentGestureIdToIndex[mPointerGesture.activeGestureId] = 0;
+            mPointerGesture.currentGestureProperties[0].clear();
+            mPointerGesture.currentGestureProperties[0].id = mPointerGesture.activeGestureId;
+            mPointerGesture.currentGestureProperties[0].toolType =
+                    AMOTION_EVENT_TOOL_TYPE_FINGER;
+            mPointerGesture.currentGestureCoords[0].clear();
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X,
+                    mPointerGesture.referenceGestureX);
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y,
+                    mPointerGesture.referenceGestureY);
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+        } else if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
+            // FREEFORM mode.
+#if DEBUG_GESTURES
+            ALOGD("Gestures: FREEFORM activeTouchId=%d,"
+                    "activeGestureId=%d, currentTouchPointerCount=%d",
+                    activeTouchId, mPointerGesture.activeGestureId, currentFingerCount);
+#endif
+            ALOG_ASSERT(mPointerGesture.activeGestureId >= 0);
+
+            mPointerGesture.currentGestureIdBits.clear();
+
+            BitSet32 mappedTouchIdBits;
+            BitSet32 usedGestureIdBits;
+            if (mPointerGesture.lastGestureMode != PointerGesture::FREEFORM) {
+                // Initially, assign the active gesture id to the active touch point
+                // if there is one.  No other touch id bits are mapped yet.
+                if (!*outCancelPreviousGesture) {
+                    mappedTouchIdBits.markBit(activeTouchId);
+                    usedGestureIdBits.markBit(mPointerGesture.activeGestureId);
+                    mPointerGesture.freeformTouchToGestureIdMap[activeTouchId] =
+                            mPointerGesture.activeGestureId;
+                } else {
+                    mPointerGesture.activeGestureId = -1;
+                }
+            } else {
+                // Otherwise, assume we mapped all touches from the previous frame.
+                // Reuse all mappings that are still applicable.
+                mappedTouchIdBits.value = mLastFingerIdBits.value
+                        & mCurrentFingerIdBits.value;
+                usedGestureIdBits = mPointerGesture.lastGestureIdBits;
+
+                // Check whether we need to choose a new active gesture id because the
+                // current went went up.
+                for (BitSet32 upTouchIdBits(mLastFingerIdBits.value
+                        & ~mCurrentFingerIdBits.value);
+                        !upTouchIdBits.isEmpty(); ) {
+                    uint32_t upTouchId = upTouchIdBits.clearFirstMarkedBit();
+                    uint32_t upGestureId = mPointerGesture.freeformTouchToGestureIdMap[upTouchId];
+                    if (upGestureId == uint32_t(mPointerGesture.activeGestureId)) {
+                        mPointerGesture.activeGestureId = -1;
+                        break;
+                    }
+                }
+            }
+
+#if DEBUG_GESTURES
+            ALOGD("Gestures: FREEFORM follow up "
+                    "mappedTouchIdBits=0x%08x, usedGestureIdBits=0x%08x, "
+                    "activeGestureId=%d",
+                    mappedTouchIdBits.value, usedGestureIdBits.value,
+                    mPointerGesture.activeGestureId);
+#endif
+
+            BitSet32 idBits(mCurrentFingerIdBits);
+            for (uint32_t i = 0; i < currentFingerCount; i++) {
+                uint32_t touchId = idBits.clearFirstMarkedBit();
+                uint32_t gestureId;
+                if (!mappedTouchIdBits.hasBit(touchId)) {
+                    gestureId = usedGestureIdBits.markFirstUnmarkedBit();
+                    mPointerGesture.freeformTouchToGestureIdMap[touchId] = gestureId;
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: FREEFORM "
+                            "new mapping for touch id %d -> gesture id %d",
+                            touchId, gestureId);
+#endif
+                } else {
+                    gestureId = mPointerGesture.freeformTouchToGestureIdMap[touchId];
+#if DEBUG_GESTURES
+                    ALOGD("Gestures: FREEFORM "
+                            "existing mapping for touch id %d -> gesture id %d",
+                            touchId, gestureId);
+#endif
+                }
+                mPointerGesture.currentGestureIdBits.markBit(gestureId);
+                mPointerGesture.currentGestureIdToIndex[gestureId] = i;
+
+                const RawPointerData::Pointer& pointer =
+                        mCurrentRawPointerData.pointerForId(touchId);
+                float deltaX = (pointer.x - mPointerGesture.referenceTouchX)
+                        * mPointerXZoomScale;
+                float deltaY = (pointer.y - mPointerGesture.referenceTouchY)
+                        * mPointerYZoomScale;
+                rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+
+                mPointerGesture.currentGestureProperties[i].clear();
+                mPointerGesture.currentGestureProperties[i].id = gestureId;
+                mPointerGesture.currentGestureProperties[i].toolType =
+                        AMOTION_EVENT_TOOL_TYPE_FINGER;
+                mPointerGesture.currentGestureCoords[i].clear();
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_X, mPointerGesture.referenceGestureX + deltaX);
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_Y, mPointerGesture.referenceGestureY + deltaY);
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+            }
+
+            if (mPointerGesture.activeGestureId < 0) {
+                mPointerGesture.activeGestureId =
+                        mPointerGesture.currentGestureIdBits.firstMarkedBit();
+#if DEBUG_GESTURES
+                ALOGD("Gestures: FREEFORM new "
+                        "activeGestureId=%d", mPointerGesture.activeGestureId);
+#endif
+            }
+        }
+    }
+
+    mPointerController->setButtonState(mCurrentButtonState);
+
+#if DEBUG_GESTURES
+    ALOGD("Gestures: finishPreviousGesture=%s, cancelPreviousGesture=%s, "
+            "currentGestureMode=%d, currentGestureIdBits=0x%08x, "
+            "lastGestureMode=%d, lastGestureIdBits=0x%08x",
+            toString(*outFinishPreviousGesture), toString(*outCancelPreviousGesture),
+            mPointerGesture.currentGestureMode, mPointerGesture.currentGestureIdBits.value,
+            mPointerGesture.lastGestureMode, mPointerGesture.lastGestureIdBits.value);
+    for (BitSet32 idBits = mPointerGesture.currentGestureIdBits; !idBits.isEmpty(); ) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t index = mPointerGesture.currentGestureIdToIndex[id];
+        const PointerProperties& properties = mPointerGesture.currentGestureProperties[index];
+        const PointerCoords& coords = mPointerGesture.currentGestureCoords[index];
+        ALOGD("  currentGesture[%d]: index=%d, toolType=%d, "
+                "x=%0.3f, y=%0.3f, pressure=%0.3f",
+                id, index, properties.toolType,
+                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
+    }
+    for (BitSet32 idBits = mPointerGesture.lastGestureIdBits; !idBits.isEmpty(); ) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t index = mPointerGesture.lastGestureIdToIndex[id];
+        const PointerProperties& properties = mPointerGesture.lastGestureProperties[index];
+        const PointerCoords& coords = mPointerGesture.lastGestureCoords[index];
+        ALOGD("  lastGesture[%d]: index=%d, toolType=%d, "
+                "x=%0.3f, y=%0.3f, pressure=%0.3f",
+                id, index, properties.toolType,
+                coords.getAxisValue(AMOTION_EVENT_AXIS_X),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_Y),
+                coords.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
+    }
+#endif
+    return true;
+}
+
+void TouchInputMapper::dispatchPointerStylus(nsecs_t when, uint32_t policyFlags) {
+    mPointerSimple.currentCoords.clear();
+    mPointerSimple.currentProperties.clear();
+
+    bool down, hovering;
+    if (!mCurrentStylusIdBits.isEmpty()) {
+        uint32_t id = mCurrentStylusIdBits.firstMarkedBit();
+        uint32_t index = mCurrentCookedPointerData.idToIndex[id];
+        float x = mCurrentCookedPointerData.pointerCoords[index].getX();
+        float y = mCurrentCookedPointerData.pointerCoords[index].getY();
+        mPointerController->setPosition(x, y);
+
+        hovering = mCurrentCookedPointerData.hoveringIdBits.hasBit(id);
+        down = !hovering;
+
+        mPointerController->getPosition(&x, &y);
+        mPointerSimple.currentCoords.copyFrom(mCurrentCookedPointerData.pointerCoords[index]);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerSimple.currentProperties.id = 0;
+        mPointerSimple.currentProperties.toolType =
+                mCurrentCookedPointerData.pointerProperties[index].toolType;
+    } else {
+        down = false;
+        hovering = false;
+    }
+
+    dispatchPointerSimple(when, policyFlags, down, hovering);
+}
+
+void TouchInputMapper::abortPointerStylus(nsecs_t when, uint32_t policyFlags) {
+    abortPointerSimple(when, policyFlags);
+}
+
+void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags) {
+    mPointerSimple.currentCoords.clear();
+    mPointerSimple.currentProperties.clear();
+
+    bool down, hovering;
+    if (!mCurrentMouseIdBits.isEmpty()) {
+        uint32_t id = mCurrentMouseIdBits.firstMarkedBit();
+        uint32_t currentIndex = mCurrentRawPointerData.idToIndex[id];
+        if (mLastMouseIdBits.hasBit(id)) {
+            uint32_t lastIndex = mCurrentRawPointerData.idToIndex[id];
+            float deltaX = (mCurrentRawPointerData.pointers[currentIndex].x
+                    - mLastRawPointerData.pointers[lastIndex].x)
+                    * mPointerXMovementScale;
+            float deltaY = (mCurrentRawPointerData.pointers[currentIndex].y
+                    - mLastRawPointerData.pointers[lastIndex].y)
+                    * mPointerYMovementScale;
+
+            rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
+            mPointerVelocityControl.move(when, &deltaX, &deltaY);
+
+            mPointerController->move(deltaX, deltaY);
+        } else {
+            mPointerVelocityControl.reset();
+        }
+
+        down = isPointerDown(mCurrentButtonState);
+        hovering = !down;
+
+        float x, y;
+        mPointerController->getPosition(&x, &y);
+        mPointerSimple.currentCoords.copyFrom(
+                mCurrentCookedPointerData.pointerCoords[currentIndex]);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
+                hovering ? 0.0f : 1.0f);
+        mPointerSimple.currentProperties.id = 0;
+        mPointerSimple.currentProperties.toolType =
+                mCurrentCookedPointerData.pointerProperties[currentIndex].toolType;
+    } else {
+        mPointerVelocityControl.reset();
+
+        down = false;
+        hovering = false;
+    }
+
+    dispatchPointerSimple(when, policyFlags, down, hovering);
+}
+
+void TouchInputMapper::abortPointerMouse(nsecs_t when, uint32_t policyFlags) {
+    abortPointerSimple(when, policyFlags);
+
+    mPointerVelocityControl.reset();
+}
+
+void TouchInputMapper::dispatchPointerSimple(nsecs_t when, uint32_t policyFlags,
+        bool down, bool hovering) {
+    int32_t metaState = getContext()->getGlobalMetaState();
+
+    if (mPointerController != NULL) {
+        if (down || hovering) {
+            mPointerController->setPresentation(PointerControllerInterface::PRESENTATION_POINTER);
+            mPointerController->clearSpots();
+            mPointerController->setButtonState(mCurrentButtonState);
+            mPointerController->unfade(PointerControllerInterface::TRANSITION_IMMEDIATE);
+        } else if (!down && !hovering && (mPointerSimple.down || mPointerSimple.hovering)) {
+            mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+        }
+    }
+
+    if (mPointerSimple.down && !down) {
+        mPointerSimple.down = false;
+
+        // Send up.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                 AMOTION_EVENT_ACTION_UP, 0, metaState, mLastButtonState, 0,
+                 mViewport.displayId,
+                 1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
+                 mOrientedXPrecision, mOrientedYPrecision,
+                 mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (mPointerSimple.hovering && !hovering) {
+        mPointerSimple.hovering = false;
+
+        // Send hover exit.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_HOVER_EXIT, 0, metaState, mLastButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.lastProperties, &mPointerSimple.lastCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (down) {
+        if (!mPointerSimple.down) {
+            mPointerSimple.down = true;
+            mPointerSimple.downTime = when;
+
+            // Send down.
+            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_DOWN, 0, metaState, mCurrentButtonState, 0,
+                    mViewport.displayId,
+                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                    mOrientedXPrecision, mOrientedYPrecision,
+                    mPointerSimple.downTime);
+            getListener()->notifyMotion(&args);
+        }
+
+        // Send move.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_MOVE, 0, metaState, mCurrentButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (hovering) {
+        if (!mPointerSimple.hovering) {
+            mPointerSimple.hovering = true;
+
+            // Send hover enter.
+            NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                    AMOTION_EVENT_ACTION_HOVER_ENTER, 0, metaState, mCurrentButtonState, 0,
+                    mViewport.displayId,
+                    1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                    mOrientedXPrecision, mOrientedYPrecision,
+                    mPointerSimple.downTime);
+            getListener()->notifyMotion(&args);
+        }
+
+        // Send hover move.
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_HOVER_MOVE, 0, metaState, mCurrentButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.currentProperties, &mPointerSimple.currentCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    if (mCurrentRawVScroll || mCurrentRawHScroll) {
+        float vscroll = mCurrentRawVScroll;
+        float hscroll = mCurrentRawHScroll;
+        mWheelYVelocityControl.move(when, NULL, &vscroll);
+        mWheelXVelocityControl.move(when, &hscroll, NULL);
+
+        // Send scroll.
+        PointerCoords pointerCoords;
+        pointerCoords.copyFrom(mPointerSimple.currentCoords);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_VSCROLL, vscroll);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_HSCROLL, hscroll);
+
+        NotifyMotionArgs args(when, getDeviceId(), mSource, policyFlags,
+                AMOTION_EVENT_ACTION_SCROLL, 0, metaState, mCurrentButtonState, 0,
+                mViewport.displayId,
+                1, &mPointerSimple.currentProperties, &pointerCoords,
+                mOrientedXPrecision, mOrientedYPrecision,
+                mPointerSimple.downTime);
+        getListener()->notifyMotion(&args);
+    }
+
+    // Save state.
+    if (down || hovering) {
+        mPointerSimple.lastCoords.copyFrom(mPointerSimple.currentCoords);
+        mPointerSimple.lastProperties.copyFrom(mPointerSimple.currentProperties);
+    } else {
+        mPointerSimple.reset();
+    }
+}
+
+void TouchInputMapper::abortPointerSimple(nsecs_t when, uint32_t policyFlags) {
+    mPointerSimple.currentCoords.clear();
+    mPointerSimple.currentProperties.clear();
+
+    dispatchPointerSimple(when, policyFlags, false, false);
+}
+
+void TouchInputMapper::dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
+        int32_t action, int32_t flags, int32_t metaState, int32_t buttonState, int32_t edgeFlags,
+        const PointerProperties* properties, const PointerCoords* coords,
+        const uint32_t* idToIndex, BitSet32 idBits,
+        int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime) {
+    PointerCoords pointerCoords[MAX_POINTERS];
+    PointerProperties pointerProperties[MAX_POINTERS];
+    uint32_t pointerCount = 0;
+    while (!idBits.isEmpty()) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t index = idToIndex[id];
+        pointerProperties[pointerCount].copyFrom(properties[index]);
+        pointerCoords[pointerCount].copyFrom(coords[index]);
+
+        if (changedId >= 0 && id == uint32_t(changedId)) {
+            action |= pointerCount << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+        }
+
+        pointerCount += 1;
+    }
+
+    ALOG_ASSERT(pointerCount != 0);
+
+    if (changedId >= 0 && pointerCount == 1) {
+        // Replace initial down and final up action.
+        // We can compare the action without masking off the changed pointer index
+        // because we know the index is 0.
+        if (action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
+            action = AMOTION_EVENT_ACTION_DOWN;
+        } else if (action == AMOTION_EVENT_ACTION_POINTER_UP) {
+            action = AMOTION_EVENT_ACTION_UP;
+        } else {
+            // Can't happen.
+            ALOG_ASSERT(false);
+        }
+    }
+
+    NotifyMotionArgs args(when, getDeviceId(), source, policyFlags,
+            action, flags, metaState, buttonState, edgeFlags,
+            mViewport.displayId, pointerCount, pointerProperties, pointerCoords,
+            xPrecision, yPrecision, downTime);
+    getListener()->notifyMotion(&args);
+}
+
+bool TouchInputMapper::updateMovedPointers(const PointerProperties* inProperties,
+        const PointerCoords* inCoords, const uint32_t* inIdToIndex,
+        PointerProperties* outProperties, PointerCoords* outCoords, const uint32_t* outIdToIndex,
+        BitSet32 idBits) const {
+    bool changed = false;
+    while (!idBits.isEmpty()) {
+        uint32_t id = idBits.clearFirstMarkedBit();
+        uint32_t inIndex = inIdToIndex[id];
+        uint32_t outIndex = outIdToIndex[id];
+
+        const PointerProperties& curInProperties = inProperties[inIndex];
+        const PointerCoords& curInCoords = inCoords[inIndex];
+        PointerProperties& curOutProperties = outProperties[outIndex];
+        PointerCoords& curOutCoords = outCoords[outIndex];
+
+        if (curInProperties != curOutProperties) {
+            curOutProperties.copyFrom(curInProperties);
+            changed = true;
+        }
+
+        if (curInCoords != curOutCoords) {
+            curOutCoords.copyFrom(curInCoords);
+            changed = true;
+        }
+    }
+    return changed;
+}
+
+void TouchInputMapper::fadePointer() {
+    if (mPointerController != NULL) {
+        mPointerController->fade(PointerControllerInterface::TRANSITION_GRADUAL);
+    }
+}
+
+bool TouchInputMapper::isPointInsideSurface(int32_t x, int32_t y) {
+    return x >= mRawPointerAxes.x.minValue && x <= mRawPointerAxes.x.maxValue
+            && y >= mRawPointerAxes.y.minValue && y <= mRawPointerAxes.y.maxValue;
+}
+
+const TouchInputMapper::VirtualKey* TouchInputMapper::findVirtualKeyHit(
+        int32_t x, int32_t y) {
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+
+#if DEBUG_VIRTUAL_KEYS
+        ALOGD("VirtualKeys: Hit test (%d, %d): keyCode=%d, scanCode=%d, "
+                "left=%d, top=%d, right=%d, bottom=%d",
+                x, y,
+                virtualKey.keyCode, virtualKey.scanCode,
+                virtualKey.hitLeft, virtualKey.hitTop,
+                virtualKey.hitRight, virtualKey.hitBottom);
+#endif
+
+        if (virtualKey.isHit(x, y)) {
+            return & virtualKey;
+        }
+    }
+
+    return NULL;
+}
+
+void TouchInputMapper::assignPointerIds() {
+    uint32_t currentPointerCount = mCurrentRawPointerData.pointerCount;
+    uint32_t lastPointerCount = mLastRawPointerData.pointerCount;
+
+    mCurrentRawPointerData.clearIdBits();
+
+    if (currentPointerCount == 0) {
+        // No pointers to assign.
+        return;
+    }
+
+    if (lastPointerCount == 0) {
+        // All pointers are new.
+        for (uint32_t i = 0; i < currentPointerCount; i++) {
+            uint32_t id = i;
+            mCurrentRawPointerData.pointers[i].id = id;
+            mCurrentRawPointerData.idToIndex[id] = i;
+            mCurrentRawPointerData.markIdBit(id, mCurrentRawPointerData.isHovering(i));
+        }
+        return;
+    }
+
+    if (currentPointerCount == 1 && lastPointerCount == 1
+            && mCurrentRawPointerData.pointers[0].toolType
+                    == mLastRawPointerData.pointers[0].toolType) {
+        // Only one pointer and no change in count so it must have the same id as before.
+        uint32_t id = mLastRawPointerData.pointers[0].id;
+        mCurrentRawPointerData.pointers[0].id = id;
+        mCurrentRawPointerData.idToIndex[id] = 0;
+        mCurrentRawPointerData.markIdBit(id, mCurrentRawPointerData.isHovering(0));
+        return;
+    }
+
+    // General case.
+    // We build a heap of squared euclidean distances between current and last pointers
+    // associated with the current and last pointer indices.  Then, we find the best
+    // match (by distance) for each current pointer.
+    // The pointers must have the same tool type but it is possible for them to
+    // transition from hovering to touching or vice-versa while retaining the same id.
+    PointerDistanceHeapElement heap[MAX_POINTERS * MAX_POINTERS];
+
+    uint32_t heapSize = 0;
+    for (uint32_t currentPointerIndex = 0; currentPointerIndex < currentPointerCount;
+            currentPointerIndex++) {
+        for (uint32_t lastPointerIndex = 0; lastPointerIndex < lastPointerCount;
+                lastPointerIndex++) {
+            const RawPointerData::Pointer& currentPointer =
+                    mCurrentRawPointerData.pointers[currentPointerIndex];
+            const RawPointerData::Pointer& lastPointer =
+                    mLastRawPointerData.pointers[lastPointerIndex];
+            if (currentPointer.toolType == lastPointer.toolType) {
+                int64_t deltaX = currentPointer.x - lastPointer.x;
+                int64_t deltaY = currentPointer.y - lastPointer.y;
+
+                uint64_t distance = uint64_t(deltaX * deltaX + deltaY * deltaY);
+
+                // Insert new element into the heap (sift up).
+                heap[heapSize].currentPointerIndex = currentPointerIndex;
+                heap[heapSize].lastPointerIndex = lastPointerIndex;
+                heap[heapSize].distance = distance;
+                heapSize += 1;
+            }
+        }
+    }
+
+    // Heapify
+    for (uint32_t startIndex = heapSize / 2; startIndex != 0; ) {
+        startIndex -= 1;
+        for (uint32_t parentIndex = startIndex; ;) {
+            uint32_t childIndex = parentIndex * 2 + 1;
+            if (childIndex >= heapSize) {
+                break;
+            }
+
+            if (childIndex + 1 < heapSize
+                    && heap[childIndex + 1].distance < heap[childIndex].distance) {
+                childIndex += 1;
+            }
+
+            if (heap[parentIndex].distance <= heap[childIndex].distance) {
+                break;
+            }
+
+            swap(heap[parentIndex], heap[childIndex]);
+            parentIndex = childIndex;
+        }
+    }
+
+#if DEBUG_POINTER_ASSIGNMENT
+    ALOGD("assignPointerIds - initial distance min-heap: size=%d", heapSize);
+    for (size_t i = 0; i < heapSize; i++) {
+        ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
+                i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
+                heap[i].distance);
+    }
+#endif
+
+    // Pull matches out by increasing order of distance.
+    // To avoid reassigning pointers that have already been matched, the loop keeps track
+    // of which last and current pointers have been matched using the matchedXXXBits variables.
+    // It also tracks the used pointer id bits.
+    BitSet32 matchedLastBits(0);
+    BitSet32 matchedCurrentBits(0);
+    BitSet32 usedIdBits(0);
+    bool first = true;
+    for (uint32_t i = min(currentPointerCount, lastPointerCount); heapSize > 0 && i > 0; i--) {
+        while (heapSize > 0) {
+            if (first) {
+                // The first time through the loop, we just consume the root element of
+                // the heap (the one with smallest distance).
+                first = false;
+            } else {
+                // Previous iterations consumed the root element of the heap.
+                // Pop root element off of the heap (sift down).
+                heap[0] = heap[heapSize];
+                for (uint32_t parentIndex = 0; ;) {
+                    uint32_t childIndex = parentIndex * 2 + 1;
+                    if (childIndex >= heapSize) {
+                        break;
+                    }
+
+                    if (childIndex + 1 < heapSize
+                            && heap[childIndex + 1].distance < heap[childIndex].distance) {
+                        childIndex += 1;
+                    }
+
+                    if (heap[parentIndex].distance <= heap[childIndex].distance) {
+                        break;
+                    }
+
+                    swap(heap[parentIndex], heap[childIndex]);
+                    parentIndex = childIndex;
+                }
+
+#if DEBUG_POINTER_ASSIGNMENT
+                ALOGD("assignPointerIds - reduced distance min-heap: size=%d", heapSize);
+                for (size_t i = 0; i < heapSize; i++) {
+                    ALOGD("  heap[%d]: cur=%d, last=%d, distance=%lld",
+                            i, heap[i].currentPointerIndex, heap[i].lastPointerIndex,
+                            heap[i].distance);
+                }
+#endif
+            }
+
+            heapSize -= 1;
+
+            uint32_t currentPointerIndex = heap[0].currentPointerIndex;
+            if (matchedCurrentBits.hasBit(currentPointerIndex)) continue; // already matched
+
+            uint32_t lastPointerIndex = heap[0].lastPointerIndex;
+            if (matchedLastBits.hasBit(lastPointerIndex)) continue; // already matched
+
+            matchedCurrentBits.markBit(currentPointerIndex);
+            matchedLastBits.markBit(lastPointerIndex);
+
+            uint32_t id = mLastRawPointerData.pointers[lastPointerIndex].id;
+            mCurrentRawPointerData.pointers[currentPointerIndex].id = id;
+            mCurrentRawPointerData.idToIndex[id] = currentPointerIndex;
+            mCurrentRawPointerData.markIdBit(id,
+                    mCurrentRawPointerData.isHovering(currentPointerIndex));
+            usedIdBits.markBit(id);
+
+#if DEBUG_POINTER_ASSIGNMENT
+            ALOGD("assignPointerIds - matched: cur=%d, last=%d, id=%d, distance=%lld",
+                    lastPointerIndex, currentPointerIndex, id, heap[0].distance);
+#endif
+            break;
+        }
+    }
+
+    // Assign fresh ids to pointers that were not matched in the process.
+    for (uint32_t i = currentPointerCount - matchedCurrentBits.count(); i != 0; i--) {
+        uint32_t currentPointerIndex = matchedCurrentBits.markFirstUnmarkedBit();
+        uint32_t id = usedIdBits.markFirstUnmarkedBit();
+
+        mCurrentRawPointerData.pointers[currentPointerIndex].id = id;
+        mCurrentRawPointerData.idToIndex[id] = currentPointerIndex;
+        mCurrentRawPointerData.markIdBit(id,
+                mCurrentRawPointerData.isHovering(currentPointerIndex));
+
+#if DEBUG_POINTER_ASSIGNMENT
+        ALOGD("assignPointerIds - assigned: cur=%d, id=%d",
+                currentPointerIndex, id);
+#endif
+    }
+}
+
+int32_t TouchInputMapper::getKeyCodeState(uint32_t sourceMask, int32_t keyCode) {
+    if (mCurrentVirtualKey.down && mCurrentVirtualKey.keyCode == keyCode) {
+        return AKEY_STATE_VIRTUAL;
+    }
+
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+        if (virtualKey.keyCode == keyCode) {
+            return AKEY_STATE_UP;
+        }
+    }
+
+    return AKEY_STATE_UNKNOWN;
+}
+
+int32_t TouchInputMapper::getScanCodeState(uint32_t sourceMask, int32_t scanCode) {
+    if (mCurrentVirtualKey.down && mCurrentVirtualKey.scanCode == scanCode) {
+        return AKEY_STATE_VIRTUAL;
+    }
+
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+        if (virtualKey.scanCode == scanCode) {
+            return AKEY_STATE_UP;
+        }
+    }
+
+    return AKEY_STATE_UNKNOWN;
+}
+
+bool TouchInputMapper::markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+        const int32_t* keyCodes, uint8_t* outFlags) {
+    size_t numVirtualKeys = mVirtualKeys.size();
+    for (size_t i = 0; i < numVirtualKeys; i++) {
+        const VirtualKey& virtualKey = mVirtualKeys[i];
+
+        for (size_t i = 0; i < numCodes; i++) {
+            if (virtualKey.keyCode == keyCodes[i]) {
+                outFlags[i] = 1;
+            }
+        }
+    }
+
+    return true;
+}
+
+
+// --- SingleTouchInputMapper ---
+
+SingleTouchInputMapper::SingleTouchInputMapper(InputDevice* device) :
+        TouchInputMapper(device) {
+}
+
+SingleTouchInputMapper::~SingleTouchInputMapper() {
+}
+
+void SingleTouchInputMapper::reset(nsecs_t when) {
+    mSingleTouchMotionAccumulator.reset(getDevice());
+
+    TouchInputMapper::reset(when);
+}
+
+void SingleTouchInputMapper::process(const RawEvent* rawEvent) {
+    TouchInputMapper::process(rawEvent);
+
+    mSingleTouchMotionAccumulator.process(rawEvent);
+}
+
+void SingleTouchInputMapper::syncTouch(nsecs_t when, bool* outHavePointerIds) {
+    if (mTouchButtonAccumulator.isToolActive()) {
+        mCurrentRawPointerData.pointerCount = 1;
+        mCurrentRawPointerData.idToIndex[0] = 0;
+
+        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
+                && (mTouchButtonAccumulator.isHovering()
+                        || (mRawPointerAxes.pressure.valid
+                                && mSingleTouchMotionAccumulator.getAbsolutePressure() <= 0));
+        mCurrentRawPointerData.markIdBit(0, isHovering);
+
+        RawPointerData::Pointer& outPointer = mCurrentRawPointerData.pointers[0];
+        outPointer.id = 0;
+        outPointer.x = mSingleTouchMotionAccumulator.getAbsoluteX();
+        outPointer.y = mSingleTouchMotionAccumulator.getAbsoluteY();
+        outPointer.pressure = mSingleTouchMotionAccumulator.getAbsolutePressure();
+        outPointer.touchMajor = 0;
+        outPointer.touchMinor = 0;
+        outPointer.toolMajor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
+        outPointer.toolMinor = mSingleTouchMotionAccumulator.getAbsoluteToolWidth();
+        outPointer.orientation = 0;
+        outPointer.distance = mSingleTouchMotionAccumulator.getAbsoluteDistance();
+        outPointer.tiltX = mSingleTouchMotionAccumulator.getAbsoluteTiltX();
+        outPointer.tiltY = mSingleTouchMotionAccumulator.getAbsoluteTiltY();
+        outPointer.toolType = mTouchButtonAccumulator.getToolType();
+        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+            outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+        }
+        outPointer.isHovering = isHovering;
+    }
+}
+
+void SingleTouchInputMapper::configureRawPointerAxes() {
+    TouchInputMapper::configureRawPointerAxes();
+
+    getAbsoluteAxisInfo(ABS_X, &mRawPointerAxes.x);
+    getAbsoluteAxisInfo(ABS_Y, &mRawPointerAxes.y);
+    getAbsoluteAxisInfo(ABS_PRESSURE, &mRawPointerAxes.pressure);
+    getAbsoluteAxisInfo(ABS_TOOL_WIDTH, &mRawPointerAxes.toolMajor);
+    getAbsoluteAxisInfo(ABS_DISTANCE, &mRawPointerAxes.distance);
+    getAbsoluteAxisInfo(ABS_TILT_X, &mRawPointerAxes.tiltX);
+    getAbsoluteAxisInfo(ABS_TILT_Y, &mRawPointerAxes.tiltY);
+}
+
+bool SingleTouchInputMapper::hasStylus() const {
+    return mTouchButtonAccumulator.hasStylus();
+}
+
+
+// --- MultiTouchInputMapper ---
+
+MultiTouchInputMapper::MultiTouchInputMapper(InputDevice* device) :
+        TouchInputMapper(device) {
+}
+
+MultiTouchInputMapper::~MultiTouchInputMapper() {
+}
+
+void MultiTouchInputMapper::reset(nsecs_t when) {
+    mMultiTouchMotionAccumulator.reset(getDevice());
+
+    mPointerIdBits.clear();
+
+    TouchInputMapper::reset(when);
+}
+
+void MultiTouchInputMapper::process(const RawEvent* rawEvent) {
+    TouchInputMapper::process(rawEvent);
+
+    mMultiTouchMotionAccumulator.process(rawEvent);
+}
+
+void MultiTouchInputMapper::syncTouch(nsecs_t when, bool* outHavePointerIds) {
+    size_t inCount = mMultiTouchMotionAccumulator.getSlotCount();
+    size_t outCount = 0;
+    BitSet32 newPointerIdBits;
+
+    for (size_t inIndex = 0; inIndex < inCount; inIndex++) {
+        const MultiTouchMotionAccumulator::Slot* inSlot =
+                mMultiTouchMotionAccumulator.getSlot(inIndex);
+        if (!inSlot->isInUse()) {
+            continue;
+        }
+
+        if (outCount >= MAX_POINTERS) {
+#if DEBUG_POINTERS
+            ALOGD("MultiTouch device %s emitted more than maximum of %d pointers; "
+                    "ignoring the rest.",
+                    getDeviceName().string(), MAX_POINTERS);
+#endif
+            break; // too many fingers!
+        }
+
+        RawPointerData::Pointer& outPointer = mCurrentRawPointerData.pointers[outCount];
+        outPointer.x = inSlot->getX();
+        outPointer.y = inSlot->getY();
+        outPointer.pressure = inSlot->getPressure();
+        outPointer.touchMajor = inSlot->getTouchMajor();
+        outPointer.touchMinor = inSlot->getTouchMinor();
+        outPointer.toolMajor = inSlot->getToolMajor();
+        outPointer.toolMinor = inSlot->getToolMinor();
+        outPointer.orientation = inSlot->getOrientation();
+        outPointer.distance = inSlot->getDistance();
+        outPointer.tiltX = 0;
+        outPointer.tiltY = 0;
+
+        outPointer.toolType = inSlot->getToolType();
+        if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+            outPointer.toolType = mTouchButtonAccumulator.getToolType();
+            if (outPointer.toolType == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) {
+                outPointer.toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+            }
+        }
+
+        bool isHovering = mTouchButtonAccumulator.getToolType() != AMOTION_EVENT_TOOL_TYPE_MOUSE
+                && (mTouchButtonAccumulator.isHovering()
+                        || (mRawPointerAxes.pressure.valid && inSlot->getPressure() <= 0));
+        outPointer.isHovering = isHovering;
+
+        // Assign pointer id using tracking id if available.
+        if (*outHavePointerIds) {
+            int32_t trackingId = inSlot->getTrackingId();
+            int32_t id = -1;
+            if (trackingId >= 0) {
+                for (BitSet32 idBits(mPointerIdBits); !idBits.isEmpty(); ) {
+                    uint32_t n = idBits.clearFirstMarkedBit();
+                    if (mPointerTrackingIdMap[n] == trackingId) {
+                        id = n;
+                    }
+                }
+
+                if (id < 0 && !mPointerIdBits.isFull()) {
+                    id = mPointerIdBits.markFirstUnmarkedBit();
+                    mPointerTrackingIdMap[id] = trackingId;
+                }
+            }
+            if (id < 0) {
+                *outHavePointerIds = false;
+                mCurrentRawPointerData.clearIdBits();
+                newPointerIdBits.clear();
+            } else {
+                outPointer.id = id;
+                mCurrentRawPointerData.idToIndex[id] = outCount;
+                mCurrentRawPointerData.markIdBit(id, isHovering);
+                newPointerIdBits.markBit(id);
+            }
+        }
+
+        outCount += 1;
+    }
+
+    mCurrentRawPointerData.pointerCount = outCount;
+    mPointerIdBits = newPointerIdBits;
+
+    mMultiTouchMotionAccumulator.finishSync();
+}
+
+void MultiTouchInputMapper::configureRawPointerAxes() {
+    TouchInputMapper::configureRawPointerAxes();
+
+    getAbsoluteAxisInfo(ABS_MT_POSITION_X, &mRawPointerAxes.x);
+    getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &mRawPointerAxes.y);
+    getAbsoluteAxisInfo(ABS_MT_TOUCH_MAJOR, &mRawPointerAxes.touchMajor);
+    getAbsoluteAxisInfo(ABS_MT_TOUCH_MINOR, &mRawPointerAxes.touchMinor);
+    getAbsoluteAxisInfo(ABS_MT_WIDTH_MAJOR, &mRawPointerAxes.toolMajor);
+    getAbsoluteAxisInfo(ABS_MT_WIDTH_MINOR, &mRawPointerAxes.toolMinor);
+    getAbsoluteAxisInfo(ABS_MT_ORIENTATION, &mRawPointerAxes.orientation);
+    getAbsoluteAxisInfo(ABS_MT_PRESSURE, &mRawPointerAxes.pressure);
+    getAbsoluteAxisInfo(ABS_MT_DISTANCE, &mRawPointerAxes.distance);
+    getAbsoluteAxisInfo(ABS_MT_TRACKING_ID, &mRawPointerAxes.trackingId);
+    getAbsoluteAxisInfo(ABS_MT_SLOT, &mRawPointerAxes.slot);
+
+    if (mRawPointerAxes.trackingId.valid
+            && mRawPointerAxes.slot.valid
+            && mRawPointerAxes.slot.minValue == 0 && mRawPointerAxes.slot.maxValue > 0) {
+        size_t slotCount = mRawPointerAxes.slot.maxValue + 1;
+        if (slotCount > MAX_SLOTS) {
+            ALOGW("MultiTouch Device %s reported %d slots but the framework "
+                    "only supports a maximum of %d slots at this time.",
+                    getDeviceName().string(), slotCount, MAX_SLOTS);
+            slotCount = MAX_SLOTS;
+        }
+        mMultiTouchMotionAccumulator.configure(getDevice(),
+                slotCount, true /*usingSlotsProtocol*/);
+    } else {
+        mMultiTouchMotionAccumulator.configure(getDevice(),
+                MAX_POINTERS, false /*usingSlotsProtocol*/);
+    }
+}
+
+bool MultiTouchInputMapper::hasStylus() const {
+    return mMultiTouchMotionAccumulator.hasStylus()
+            || mTouchButtonAccumulator.hasStylus();
+}
+
+
+// --- JoystickInputMapper ---
+
+JoystickInputMapper::JoystickInputMapper(InputDevice* device) :
+        InputMapper(device) {
+}
+
+JoystickInputMapper::~JoystickInputMapper() {
+}
+
+uint32_t JoystickInputMapper::getSources() {
+    return AINPUT_SOURCE_JOYSTICK;
+}
+
+void JoystickInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
+    InputMapper::populateDeviceInfo(info);
+
+    for (size_t i = 0; i < mAxes.size(); i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        addMotionRange(axis.axisInfo.axis, axis, info);
+
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            addMotionRange(axis.axisInfo.highAxis, axis, info);
+
+        }
+    }
+}
+
+void JoystickInputMapper::addMotionRange(int32_t axisId, const Axis& axis,
+        InputDeviceInfo* info) {
+    info->addMotionRange(axisId, AINPUT_SOURCE_JOYSTICK,
+            axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
+    /* In order to ease the transition for developers from using the old axes
+     * to the newer, more semantically correct axes, we'll continue to register
+     * the old axes as duplicates of their corresponding new ones.  */
+    int32_t compatAxis = getCompatAxis(axisId);
+    if (compatAxis >= 0) {
+        info->addMotionRange(compatAxis, AINPUT_SOURCE_JOYSTICK,
+                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
+    }
+}
+
+/* A mapping from axes the joystick actually has to the axes that should be
+ * artificially created for compatibility purposes.
+ * Returns -1 if no compatibility axis is needed. */
+int32_t JoystickInputMapper::getCompatAxis(int32_t axis) {
+    switch(axis) {
+    case AMOTION_EVENT_AXIS_LTRIGGER:
+        return AMOTION_EVENT_AXIS_BRAKE;
+    case AMOTION_EVENT_AXIS_RTRIGGER:
+        return AMOTION_EVENT_AXIS_GAS;
+    }
+    return -1;
+}
+
+void JoystickInputMapper::dump(String8& dump) {
+    dump.append(INDENT2 "Joystick Input Mapper:\n");
+
+    dump.append(INDENT3 "Axes:\n");
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        const char* label = getAxisLabel(axis.axisInfo.axis);
+        if (label) {
+            dump.appendFormat(INDENT4 "%s", label);
+        } else {
+            dump.appendFormat(INDENT4 "%d", axis.axisInfo.axis);
+        }
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            label = getAxisLabel(axis.axisInfo.highAxis);
+            if (label) {
+                dump.appendFormat(" / %s (split at %d)", label, axis.axisInfo.splitValue);
+            } else {
+                dump.appendFormat(" / %d (split at %d)", axis.axisInfo.highAxis,
+                        axis.axisInfo.splitValue);
+            }
+        } else if (axis.axisInfo.mode == AxisInfo::MODE_INVERT) {
+            dump.append(" (invert)");
+        }
+
+        dump.appendFormat(": min=%0.5f, max=%0.5f, flat=%0.5f, fuzz=%0.5f, resolution=%0.5f\n",
+                axis.min, axis.max, axis.flat, axis.fuzz, axis.resolution);
+        dump.appendFormat(INDENT4 "  scale=%0.5f, offset=%0.5f, "
+                "highScale=%0.5f, highOffset=%0.5f\n",
+                axis.scale, axis.offset, axis.highScale, axis.highOffset);
+        dump.appendFormat(INDENT4 "  rawAxis=%d, rawMin=%d, rawMax=%d, "
+                "rawFlat=%d, rawFuzz=%d, rawResolution=%d\n",
+                mAxes.keyAt(i), axis.rawAxisInfo.minValue, axis.rawAxisInfo.maxValue,
+                axis.rawAxisInfo.flat, axis.rawAxisInfo.fuzz, axis.rawAxisInfo.resolution);
+    }
+}
+
+void JoystickInputMapper::configure(nsecs_t when,
+        const InputReaderConfiguration* config, uint32_t changes) {
+    InputMapper::configure(when, config, changes);
+
+    if (!changes) { // first time only
+        // Collect all axes.
+        for (int32_t abs = 0; abs <= ABS_MAX; abs++) {
+            if (!(getAbsAxisUsage(abs, getDevice()->getClasses())
+                    & INPUT_DEVICE_CLASS_JOYSTICK)) {
+                continue; // axis must be claimed by a different device
+            }
+
+            RawAbsoluteAxisInfo rawAxisInfo;
+            getAbsoluteAxisInfo(abs, &rawAxisInfo);
+            if (rawAxisInfo.valid) {
+                // Map axis.
+                AxisInfo axisInfo;
+                bool explicitlyMapped = !getEventHub()->mapAxis(getDeviceId(), abs, &axisInfo);
+                if (!explicitlyMapped) {
+                    // Axis is not explicitly mapped, will choose a generic axis later.
+                    axisInfo.mode = AxisInfo::MODE_NORMAL;
+                    axisInfo.axis = -1;
+                }
+
+                // Apply flat override.
+                int32_t rawFlat = axisInfo.flatOverride < 0
+                        ? rawAxisInfo.flat : axisInfo.flatOverride;
+
+                // Calculate scaling factors and limits.
+                Axis axis;
+                if (axisInfo.mode == AxisInfo::MODE_SPLIT) {
+                    float scale = 1.0f / (axisInfo.splitValue - rawAxisInfo.minValue);
+                    float highScale = 1.0f / (rawAxisInfo.maxValue - axisInfo.splitValue);
+                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
+                            scale, 0.0f, highScale, 0.0f,
+                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
+                            rawAxisInfo.resolution * scale);
+                } else if (isCenteredAxis(axisInfo.axis)) {
+                    float scale = 2.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
+                    float offset = avg(rawAxisInfo.minValue, rawAxisInfo.maxValue) * -scale;
+                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
+                            scale, offset, scale, offset,
+                            -1.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
+                            rawAxisInfo.resolution * scale);
+                } else {
+                    float scale = 1.0f / (rawAxisInfo.maxValue - rawAxisInfo.minValue);
+                    axis.initialize(rawAxisInfo, axisInfo, explicitlyMapped,
+                            scale, 0.0f, scale, 0.0f,
+                            0.0f, 1.0f, rawFlat * scale, rawAxisInfo.fuzz * scale,
+                            rawAxisInfo.resolution * scale);
+                }
+
+                // To eliminate noise while the joystick is at rest, filter out small variations
+                // in axis values up front.
+                axis.filter = axis.fuzz ? axis.fuzz : axis.flat * 0.25f;
+
+                mAxes.add(abs, axis);
+            }
+        }
+
+        // If there are too many axes, start dropping them.
+        // Prefer to keep explicitly mapped axes.
+        if (mAxes.size() > PointerCoords::MAX_AXES) {
+            ALOGI("Joystick '%s' has %d axes but the framework only supports a maximum of %d.",
+                    getDeviceName().string(), mAxes.size(), PointerCoords::MAX_AXES);
+            pruneAxes(true);
+            pruneAxes(false);
+        }
+
+        // Assign generic axis ids to remaining axes.
+        int32_t nextGenericAxisId = AMOTION_EVENT_AXIS_GENERIC_1;
+        size_t numAxes = mAxes.size();
+        for (size_t i = 0; i < numAxes; i++) {
+            Axis& axis = mAxes.editValueAt(i);
+            if (axis.axisInfo.axis < 0) {
+                while (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16
+                        && haveAxis(nextGenericAxisId)) {
+                    nextGenericAxisId += 1;
+                }
+
+                if (nextGenericAxisId <= AMOTION_EVENT_AXIS_GENERIC_16) {
+                    axis.axisInfo.axis = nextGenericAxisId;
+                    nextGenericAxisId += 1;
+                } else {
+                    ALOGI("Ignoring joystick '%s' axis %d because all of the generic axis ids "
+                            "have already been assigned to other axes.",
+                            getDeviceName().string(), mAxes.keyAt(i));
+                    mAxes.removeItemsAt(i--);
+                    numAxes -= 1;
+                }
+            }
+        }
+    }
+}
+
+bool JoystickInputMapper::haveAxis(int32_t axisId) {
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        if (axis.axisInfo.axis == axisId
+                || (axis.axisInfo.mode == AxisInfo::MODE_SPLIT
+                        && axis.axisInfo.highAxis == axisId)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+void JoystickInputMapper::pruneAxes(bool ignoreExplicitlyMappedAxes) {
+    size_t i = mAxes.size();
+    while (mAxes.size() > PointerCoords::MAX_AXES && i-- > 0) {
+        if (ignoreExplicitlyMappedAxes && mAxes.valueAt(i).explicitlyMapped) {
+            continue;
+        }
+        ALOGI("Discarding joystick '%s' axis %d because there are too many axes.",
+                getDeviceName().string(), mAxes.keyAt(i));
+        mAxes.removeItemsAt(i);
+    }
+}
+
+bool JoystickInputMapper::isCenteredAxis(int32_t axis) {
+    switch (axis) {
+    case AMOTION_EVENT_AXIS_X:
+    case AMOTION_EVENT_AXIS_Y:
+    case AMOTION_EVENT_AXIS_Z:
+    case AMOTION_EVENT_AXIS_RX:
+    case AMOTION_EVENT_AXIS_RY:
+    case AMOTION_EVENT_AXIS_RZ:
+    case AMOTION_EVENT_AXIS_HAT_X:
+    case AMOTION_EVENT_AXIS_HAT_Y:
+    case AMOTION_EVENT_AXIS_ORIENTATION:
+    case AMOTION_EVENT_AXIS_RUDDER:
+    case AMOTION_EVENT_AXIS_WHEEL:
+        return true;
+    default:
+        return false;
+    }
+}
+
+void JoystickInputMapper::reset(nsecs_t when) {
+    // Recenter all axes.
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        Axis& axis = mAxes.editValueAt(i);
+        axis.resetValue();
+    }
+
+    InputMapper::reset(when);
+}
+
+void JoystickInputMapper::process(const RawEvent* rawEvent) {
+    switch (rawEvent->type) {
+    case EV_ABS: {
+        ssize_t index = mAxes.indexOfKey(rawEvent->code);
+        if (index >= 0) {
+            Axis& axis = mAxes.editValueAt(index);
+            float newValue, highNewValue;
+            switch (axis.axisInfo.mode) {
+            case AxisInfo::MODE_INVERT:
+                newValue = (axis.rawAxisInfo.maxValue - rawEvent->value)
+                        * axis.scale + axis.offset;
+                highNewValue = 0.0f;
+                break;
+            case AxisInfo::MODE_SPLIT:
+                if (rawEvent->value < axis.axisInfo.splitValue) {
+                    newValue = (axis.axisInfo.splitValue - rawEvent->value)
+                            * axis.scale + axis.offset;
+                    highNewValue = 0.0f;
+                } else if (rawEvent->value > axis.axisInfo.splitValue) {
+                    newValue = 0.0f;
+                    highNewValue = (rawEvent->value - axis.axisInfo.splitValue)
+                            * axis.highScale + axis.highOffset;
+                } else {
+                    newValue = 0.0f;
+                    highNewValue = 0.0f;
+                }
+                break;
+            default:
+                newValue = rawEvent->value * axis.scale + axis.offset;
+                highNewValue = 0.0f;
+                break;
+            }
+            axis.newValue = newValue;
+            axis.highNewValue = highNewValue;
+        }
+        break;
+    }
+
+    case EV_SYN:
+        switch (rawEvent->code) {
+        case SYN_REPORT:
+            sync(rawEvent->when, false /*force*/);
+            break;
+        }
+        break;
+    }
+}
+
+void JoystickInputMapper::sync(nsecs_t when, bool force) {
+    if (!filterAxes(force)) {
+        return;
+    }
+
+    int32_t metaState = mContext->getGlobalMetaState();
+    int32_t buttonState = 0;
+
+    PointerProperties pointerProperties;
+    pointerProperties.clear();
+    pointerProperties.id = 0;
+    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
+
+    PointerCoords pointerCoords;
+    pointerCoords.clear();
+
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        const Axis& axis = mAxes.valueAt(i);
+        setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.axis, axis.currentValue);
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            setPointerCoordsAxisValue(&pointerCoords, axis.axisInfo.highAxis,
+                    axis.highCurrentValue);
+        }
+    }
+
+    // Moving a joystick axis should not wake the device because joysticks can
+    // be fairly noisy even when not in use.  On the other hand, pushing a gamepad
+    // button will likely wake the device.
+    // TODO: Use the input device configuration to control this behavior more finely.
+    uint32_t policyFlags = 0;
+
+    NotifyMotionArgs args(when, getDeviceId(), AINPUT_SOURCE_JOYSTICK, policyFlags,
+            AMOTION_EVENT_ACTION_MOVE, 0, metaState, buttonState, AMOTION_EVENT_EDGE_FLAG_NONE,
+            ADISPLAY_ID_NONE, 1, &pointerProperties, &pointerCoords, 0, 0, 0);
+    getListener()->notifyMotion(&args);
+}
+
+void JoystickInputMapper::setPointerCoordsAxisValue(PointerCoords* pointerCoords,
+        int32_t axis, float value) {
+    pointerCoords->setAxisValue(axis, value);
+    /* In order to ease the transition for developers from using the old axes
+     * to the newer, more semantically correct axes, we'll continue to produce
+     * values for the old axes as mirrors of the value of their corresponding
+     * new axes. */
+    int32_t compatAxis = getCompatAxis(axis);
+    if (compatAxis >= 0) {
+        pointerCoords->setAxisValue(compatAxis, value);
+    }
+}
+
+bool JoystickInputMapper::filterAxes(bool force) {
+    bool atLeastOneSignificantChange = force;
+    size_t numAxes = mAxes.size();
+    for (size_t i = 0; i < numAxes; i++) {
+        Axis& axis = mAxes.editValueAt(i);
+        if (force || hasValueChangedSignificantly(axis.filter,
+                axis.newValue, axis.currentValue, axis.min, axis.max)) {
+            axis.currentValue = axis.newValue;
+            atLeastOneSignificantChange = true;
+        }
+        if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
+            if (force || hasValueChangedSignificantly(axis.filter,
+                    axis.highNewValue, axis.highCurrentValue, axis.min, axis.max)) {
+                axis.highCurrentValue = axis.highNewValue;
+                atLeastOneSignificantChange = true;
+            }
+        }
+    }
+    return atLeastOneSignificantChange;
+}
+
+bool JoystickInputMapper::hasValueChangedSignificantly(
+        float filter, float newValue, float currentValue, float min, float max) {
+    if (newValue != currentValue) {
+        // Filter out small changes in value unless the value is converging on the axis
+        // bounds or center point.  This is intended to reduce the amount of information
+        // sent to applications by particularly noisy joysticks (such as PS3).
+        if (fabs(newValue - currentValue) > filter
+                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, min)
+                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, max)
+                || hasMovedNearerToValueWithinFilteredRange(filter, newValue, currentValue, 0)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool JoystickInputMapper::hasMovedNearerToValueWithinFilteredRange(
+        float filter, float newValue, float currentValue, float thresholdValue) {
+    float newDistance = fabs(newValue - thresholdValue);
+    if (newDistance < filter) {
+        float oldDistance = fabs(currentValue - thresholdValue);
+        if (newDistance < oldDistance) {
+            return true;
+        }
+    }
+    return false;
+}
+
+} // namespace android
diff --git a/libs/input/InputReader.h b/libs/input/InputReader.h
new file mode 100644
index 0000000..674f67d
--- /dev/null
+++ b/libs/input/InputReader.h
@@ -0,0 +1,1817 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _UI_INPUT_READER_H
+#define _UI_INPUT_READER_H
+
+#include "EventHub.h"
+#include "PointerController.h"
+#include "InputListener.h"
+
+#include <input/Input.h>
+#include <input/VelocityControl.h>
+#include <input/VelocityTracker.h>
+#include <utils/KeyedVector.h>
+#include <utils/threads.h>
+#include <utils/Timers.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+#include <utils/BitSet.h>
+
+#include <stddef.h>
+#include <unistd.h>
+
+// Maximum supported size of a vibration pattern.
+// Must be at least 2.
+#define MAX_VIBRATE_PATTERN_SIZE 100
+
+// Maximum allowable delay value in a vibration pattern before
+// which the delay will be truncated.
+#define MAX_VIBRATE_PATTERN_DELAY_NSECS (1000000 * 1000000000LL)
+
+namespace android {
+
+class InputDevice;
+class InputMapper;
+
+/*
+ * Describes how coordinates are mapped on a physical display.
+ * See com.android.server.display.DisplayViewport.
+ */
+struct DisplayViewport {
+    int32_t displayId; // -1 if invalid
+    int32_t orientation;
+    int32_t logicalLeft;
+    int32_t logicalTop;
+    int32_t logicalRight;
+    int32_t logicalBottom;
+    int32_t physicalLeft;
+    int32_t physicalTop;
+    int32_t physicalRight;
+    int32_t physicalBottom;
+    int32_t deviceWidth;
+    int32_t deviceHeight;
+
+    DisplayViewport() :
+            displayId(ADISPLAY_ID_NONE), orientation(DISPLAY_ORIENTATION_0),
+            logicalLeft(0), logicalTop(0), logicalRight(0), logicalBottom(0),
+            physicalLeft(0), physicalTop(0), physicalRight(0), physicalBottom(0),
+            deviceWidth(0), deviceHeight(0) {
+    }
+
+    bool operator==(const DisplayViewport& other) const {
+        return displayId == other.displayId
+                && orientation == other.orientation
+                && logicalLeft == other.logicalLeft
+                && logicalTop == other.logicalTop
+                && logicalRight == other.logicalRight
+                && logicalBottom == other.logicalBottom
+                && physicalLeft == other.physicalLeft
+                && physicalTop == other.physicalTop
+                && physicalRight == other.physicalRight
+                && physicalBottom == other.physicalBottom
+                && deviceWidth == other.deviceWidth
+                && deviceHeight == other.deviceHeight;
+    }
+
+    bool operator!=(const DisplayViewport& other) const {
+        return !(*this == other);
+    }
+
+    inline bool isValid() const {
+        return displayId >= 0;
+    }
+
+    void setNonDisplayViewport(int32_t width, int32_t height) {
+        displayId = ADISPLAY_ID_NONE;
+        orientation = DISPLAY_ORIENTATION_0;
+        logicalLeft = 0;
+        logicalTop = 0;
+        logicalRight = width;
+        logicalBottom = height;
+        physicalLeft = 0;
+        physicalTop = 0;
+        physicalRight = width;
+        physicalBottom = height;
+        deviceWidth = width;
+        deviceHeight = height;
+    }
+};
+
+/*
+ * Input reader configuration.
+ *
+ * Specifies various options that modify the behavior of the input reader.
+ */
+struct InputReaderConfiguration {
+    // Describes changes that have occurred.
+    enum {
+        // The pointer speed changed.
+        CHANGE_POINTER_SPEED = 1 << 0,
+
+        // The pointer gesture control changed.
+        CHANGE_POINTER_GESTURE_ENABLEMENT = 1 << 1,
+
+        // The display size or orientation changed.
+        CHANGE_DISPLAY_INFO = 1 << 2,
+
+        // The visible touches option changed.
+        CHANGE_SHOW_TOUCHES = 1 << 3,
+
+        // The keyboard layouts must be reloaded.
+        CHANGE_KEYBOARD_LAYOUTS = 1 << 4,
+
+        // The device name alias supplied by the may have changed for some devices.
+        CHANGE_DEVICE_ALIAS = 1 << 5,
+
+        // All devices must be reopened.
+        CHANGE_MUST_REOPEN = 1 << 31,
+    };
+
+    // Gets the amount of time to disable virtual keys after the screen is touched
+    // in order to filter out accidental virtual key presses due to swiping gestures
+    // or taps near the edge of the display.  May be 0 to disable the feature.
+    nsecs_t virtualKeyQuietTime;
+
+    // The excluded device names for the platform.
+    // Devices with these names will be ignored.
+    Vector<String8> excludedDeviceNames;
+
+    // Velocity control parameters for mouse pointer movements.
+    VelocityControlParameters pointerVelocityControlParameters;
+
+    // Velocity control parameters for mouse wheel movements.
+    VelocityControlParameters wheelVelocityControlParameters;
+
+    // True if pointer gestures are enabled.
+    bool pointerGesturesEnabled;
+
+    // Quiet time between certain pointer gesture transitions.
+    // Time to allow for all fingers or buttons to settle into a stable state before
+    // starting a new gesture.
+    nsecs_t pointerGestureQuietInterval;
+
+    // The minimum speed that a pointer must travel for us to consider switching the active
+    // touch pointer to it during a drag.  This threshold is set to avoid switching due
+    // to noise from a finger resting on the touch pad (perhaps just pressing it down).
+    float pointerGestureDragMinSwitchSpeed; // in pixels per second
+
+    // Tap gesture delay time.
+    // The time between down and up must be less than this to be considered a tap.
+    nsecs_t pointerGestureTapInterval;
+
+    // Tap drag gesture delay time.
+    // The time between the previous tap's up and the next down must be less than
+    // this to be considered a drag.  Otherwise, the previous tap is finished and a
+    // new tap begins.
+    //
+    // Note that the previous tap will be held down for this entire duration so this
+    // interval must be shorter than the long press timeout.
+    nsecs_t pointerGestureTapDragInterval;
+
+    // The distance in pixels that the pointer is allowed to move from initial down
+    // to up and still be called a tap.
+    float pointerGestureTapSlop; // in pixels
+
+    // Time after the first touch points go down to settle on an initial centroid.
+    // This is intended to be enough time to handle cases where the user puts down two
+    // fingers at almost but not quite exactly the same time.
+    nsecs_t pointerGestureMultitouchSettleInterval;
+
+    // The transition from PRESS to SWIPE or FREEFORM gesture mode is made when
+    // at least two pointers have moved at least this far from their starting place.
+    float pointerGestureMultitouchMinDistance; // in pixels
+
+    // The transition from PRESS to SWIPE gesture mode can only occur when the
+    // cosine of the angle between the two vectors is greater than or equal to than this value
+    // which indicates that the vectors are oriented in the same direction.
+    // When the vectors are oriented in the exactly same direction, the cosine is 1.0.
+    // (In exactly opposite directions, the cosine is -1.0.)
+    float pointerGestureSwipeTransitionAngleCosine;
+
+    // The transition from PRESS to SWIPE gesture mode can only occur when the
+    // fingers are no more than this far apart relative to the diagonal size of
+    // the touch pad.  For example, a ratio of 0.5 means that the fingers must be
+    // no more than half the diagonal size of the touch pad apart.
+    float pointerGestureSwipeMaxWidthRatio;
+
+    // The gesture movement speed factor relative to the size of the display.
+    // Movement speed applies when the fingers are moving in the same direction.
+    // Without acceleration, a full swipe of the touch pad diagonal in movement mode
+    // will cover this portion of the display diagonal.
+    float pointerGestureMovementSpeedRatio;
+
+    // The gesture zoom speed factor relative to the size of the display.
+    // Zoom speed applies when the fingers are mostly moving relative to each other
+    // to execute a scale gesture or similar.
+    // Without acceleration, a full swipe of the touch pad diagonal in zoom mode
+    // will cover this portion of the display diagonal.
+    float pointerGestureZoomSpeedRatio;
+
+    // True to show the location of touches on the touch screen as spots.
+    bool showTouches;
+
+    InputReaderConfiguration() :
+            virtualKeyQuietTime(0),
+            pointerVelocityControlParameters(1.0f, 500.0f, 3000.0f, 3.0f),
+            wheelVelocityControlParameters(1.0f, 15.0f, 50.0f, 4.0f),
+            pointerGesturesEnabled(true),
+            pointerGestureQuietInterval(100 * 1000000LL), // 100 ms
+            pointerGestureDragMinSwitchSpeed(50), // 50 pixels per second
+            pointerGestureTapInterval(150 * 1000000LL), // 150 ms
+            pointerGestureTapDragInterval(150 * 1000000LL), // 150 ms
+            pointerGestureTapSlop(10.0f), // 10 pixels
+            pointerGestureMultitouchSettleInterval(100 * 1000000LL), // 100 ms
+            pointerGestureMultitouchMinDistance(15), // 15 pixels
+            pointerGestureSwipeTransitionAngleCosine(0.2588f), // cosine of 75 degrees
+            pointerGestureSwipeMaxWidthRatio(0.25f),
+            pointerGestureMovementSpeedRatio(0.8f),
+            pointerGestureZoomSpeedRatio(0.3f),
+            showTouches(false) { }
+
+    bool getDisplayInfo(bool external, DisplayViewport* outViewport) const;
+    void setDisplayInfo(bool external, const DisplayViewport& viewport);
+
+private:
+    DisplayViewport mInternalDisplay;
+    DisplayViewport mExternalDisplay;
+};
+
+
+/*
+ * Input reader policy interface.
+ *
+ * The input reader policy is used by the input reader to interact with the Window Manager
+ * and other system components.
+ *
+ * The actual implementation is partially supported by callbacks into the DVM
+ * via JNI.  This interface is also mocked in the unit tests.
+ *
+ * These methods must NOT re-enter the input reader since they may be called while
+ * holding the input reader lock.
+ */
+class InputReaderPolicyInterface : public virtual RefBase {
+protected:
+    InputReaderPolicyInterface() { }
+    virtual ~InputReaderPolicyInterface() { }
+
+public:
+    /* Gets the input reader configuration. */
+    virtual void getReaderConfiguration(InputReaderConfiguration* outConfig) = 0;
+
+    /* Gets a pointer controller associated with the specified cursor device (ie. a mouse). */
+    virtual sp<PointerControllerInterface> obtainPointerController(int32_t deviceId) = 0;
+
+    /* Notifies the input reader policy that some input devices have changed
+     * and provides information about all current input devices.
+     */
+    virtual void notifyInputDevicesChanged(const Vector<InputDeviceInfo>& inputDevices) = 0;
+
+    /* Gets the keyboard layout for a particular input device. */
+    virtual sp<KeyCharacterMap> getKeyboardLayoutOverlay(
+            const InputDeviceIdentifier& identifier) = 0;
+
+    /* Gets a user-supplied alias for a particular input device, or an empty string if none. */
+    virtual String8 getDeviceAlias(const InputDeviceIdentifier& identifier) = 0;
+};
+
+
+/* Processes raw input events and sends cooked event data to an input listener. */
+class InputReaderInterface : public virtual RefBase {
+protected:
+    InputReaderInterface() { }
+    virtual ~InputReaderInterface() { }
+
+public:
+    /* Dumps the state of the input reader.
+     *
+     * This method may be called on any thread (usually by the input manager). */
+    virtual void dump(String8& dump) = 0;
+
+    /* Called by the heatbeat to ensures that the reader has not deadlocked. */
+    virtual void monitor() = 0;
+
+    /* Runs a single iteration of the processing loop.
+     * Nominally reads and processes one incoming message from the EventHub.
+     *
+     * This method should be called on the input reader thread.
+     */
+    virtual void loopOnce() = 0;
+
+    /* Gets information about all input devices.
+     *
+     * This method may be called on any thread (usually by the input manager).
+     */
+    virtual void getInputDevices(Vector<InputDeviceInfo>& outInputDevices) = 0;
+
+    /* Query current input state. */
+    virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t scanCode) = 0;
+    virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t keyCode) = 0;
+    virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
+            int32_t sw) = 0;
+
+    /* Determine whether physical keys exist for the given framework-domain key codes. */
+    virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask,
+            size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags) = 0;
+
+    /* Requests that a reconfiguration of all input devices.
+     * The changes flag is a bitfield that indicates what has changed and whether
+     * the input devices must all be reopened. */
+    virtual void requestRefreshConfiguration(uint32_t changes) = 0;
+
+    /* Controls the vibrator of a particular input device. */
+    virtual void vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize,
+            ssize_t repeat, int32_t token) = 0;
+    virtual void cancelVibrate(int32_t deviceId, int32_t token) = 0;
+};
+
+
+/* Internal interface used by individual input devices to access global input device state
+ * and parameters maintained by the input reader.
+ */
+class InputReaderContext {
+public:
+    InputReaderContext() { }
+    virtual ~InputReaderContext() { }
+
+    virtual void updateGlobalMetaState() = 0;
+    virtual int32_t getGlobalMetaState() = 0;
+
+    virtual void disableVirtualKeysUntil(nsecs_t time) = 0;
+    virtual bool shouldDropVirtualKey(nsecs_t now,
+            InputDevice* device, int32_t keyCode, int32_t scanCode) = 0;
+
+    virtual void fadePointer() = 0;
+
+    virtual void requestTimeoutAtTime(nsecs_t when) = 0;
+    virtual int32_t bumpGeneration() = 0;
+
+    virtual InputReaderPolicyInterface* getPolicy() = 0;
+    virtual InputListenerInterface* getListener() = 0;
+    virtual EventHubInterface* getEventHub() = 0;
+};
+
+
+/* The input reader reads raw event data from the event hub and processes it into input events
+ * that it sends to the input listener.  Some functions of the input reader, such as early
+ * event filtering in low power states, are controlled by a separate policy object.
+ *
+ * The InputReader owns a collection of InputMappers.  Most of the work it does happens
+ * on the input reader thread but the InputReader can receive queries from other system
+ * components running on arbitrary threads.  To keep things manageable, the InputReader
+ * uses a single Mutex to guard its state.  The Mutex may be held while calling into the
+ * EventHub or the InputReaderPolicy but it is never held while calling into the
+ * InputListener.
+ */
+class InputReader : public InputReaderInterface {
+public:
+    InputReader(const sp<EventHubInterface>& eventHub,
+            const sp<InputReaderPolicyInterface>& policy,
+            const sp<InputListenerInterface>& listener);
+    virtual ~InputReader();
+
+    virtual void dump(String8& dump);
+    virtual void monitor();
+
+    virtual void loopOnce();
+
+    virtual void getInputDevices(Vector<InputDeviceInfo>& outInputDevices);
+
+    virtual int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t scanCode);
+    virtual int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask,
+            int32_t keyCode);
+    virtual int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask,
+            int32_t sw);
+
+    virtual bool hasKeys(int32_t deviceId, uint32_t sourceMask,
+            size_t numCodes, const int32_t* keyCodes, uint8_t* outFlags);
+
+    virtual void requestRefreshConfiguration(uint32_t changes);
+
+    virtual void vibrate(int32_t deviceId, const nsecs_t* pattern, size_t patternSize,
+            ssize_t repeat, int32_t token);
+    virtual void cancelVibrate(int32_t deviceId, int32_t token);
+
+protected:
+    // These members are protected so they can be instrumented by test cases.
+    virtual InputDevice* createDeviceLocked(int32_t deviceId, int32_t controllerNumber,
+            const InputDeviceIdentifier& identifier, uint32_t classes);
+
+    class ContextImpl : public InputReaderContext {
+        InputReader* mReader;
+
+    public:
+        ContextImpl(InputReader* reader);
+
+        virtual void updateGlobalMetaState();
+        virtual int32_t getGlobalMetaState();
+        virtual void disableVirtualKeysUntil(nsecs_t time);
+        virtual bool shouldDropVirtualKey(nsecs_t now,
+                InputDevice* device, int32_t keyCode, int32_t scanCode);
+        virtual void fadePointer();
+        virtual void requestTimeoutAtTime(nsecs_t when);
+        virtual int32_t bumpGeneration();
+        virtual InputReaderPolicyInterface* getPolicy();
+        virtual InputListenerInterface* getListener();
+        virtual EventHubInterface* getEventHub();
+    } mContext;
+
+    friend class ContextImpl;
+
+private:
+    Mutex mLock;
+
+    Condition mReaderIsAliveCondition;
+
+    sp<EventHubInterface> mEventHub;
+    sp<InputReaderPolicyInterface> mPolicy;
+    sp<QueuedInputListener> mQueuedListener;
+
+    InputReaderConfiguration mConfig;
+
+    // The event queue.
+    static const int EVENT_BUFFER_SIZE = 256;
+    RawEvent mEventBuffer[EVENT_BUFFER_SIZE];
+
+    KeyedVector<int32_t, InputDevice*> mDevices;
+
+    // low-level input event decoding and device management
+    void processEventsLocked(const RawEvent* rawEvents, size_t count);
+
+    void addDeviceLocked(nsecs_t when, int32_t deviceId);
+    void removeDeviceLocked(nsecs_t when, int32_t deviceId);
+    void processEventsForDeviceLocked(int32_t deviceId, const RawEvent* rawEvents, size_t count);
+    void timeoutExpiredLocked(nsecs_t when);
+
+    void handleConfigurationChangedLocked(nsecs_t when);
+
+    int32_t mGlobalMetaState;
+    void updateGlobalMetaStateLocked();
+    int32_t getGlobalMetaStateLocked();
+
+    void fadePointerLocked();
+
+    int32_t mGeneration;
+    int32_t bumpGenerationLocked();
+
+    void getInputDevicesLocked(Vector<InputDeviceInfo>& outInputDevices);
+
+    nsecs_t mDisableVirtualKeysTimeout;
+    void disableVirtualKeysUntilLocked(nsecs_t time);
+    bool shouldDropVirtualKeyLocked(nsecs_t now,
+            InputDevice* device, int32_t keyCode, int32_t scanCode);
+
+    nsecs_t mNextTimeout;
+    void requestTimeoutAtTimeLocked(nsecs_t when);
+
+    uint32_t mConfigurationChangesToRefresh;
+    void refreshConfigurationLocked(uint32_t changes);
+
+    // state queries
+    typedef int32_t (InputDevice::*GetStateFunc)(uint32_t sourceMask, int32_t code);
+    int32_t getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code,
+            GetStateFunc getStateFunc);
+    bool markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+};
+
+
+/* Reads raw events from the event hub and processes them, endlessly. */
+class InputReaderThread : public Thread {
+public:
+    InputReaderThread(const sp<InputReaderInterface>& reader);
+    virtual ~InputReaderThread();
+
+private:
+    sp<InputReaderInterface> mReader;
+
+    virtual bool threadLoop();
+};
+
+
+/* Represents the state of a single input device. */
+class InputDevice {
+public:
+    InputDevice(InputReaderContext* context, int32_t id, int32_t generation, int32_t
+            controllerNumber, const InputDeviceIdentifier& identifier, uint32_t classes);
+    ~InputDevice();
+
+    inline InputReaderContext* getContext() { return mContext; }
+    inline int32_t getId() const { return mId; }
+    inline int32_t getControllerNumber() const { return mControllerNumber; }
+    inline int32_t getGeneration() const { return mGeneration; }
+    inline const String8& getName() const { return mIdentifier.name; }
+    inline uint32_t getClasses() const { return mClasses; }
+    inline uint32_t getSources() const { return mSources; }
+
+    inline bool isExternal() { return mIsExternal; }
+    inline void setExternal(bool external) { mIsExternal = external; }
+
+    inline bool isIgnored() { return mMappers.isEmpty(); }
+
+    void dump(String8& dump);
+    void addMapper(InputMapper* mapper);
+    void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
+    void reset(nsecs_t when);
+    void process(const RawEvent* rawEvents, size_t count);
+    void timeoutExpired(nsecs_t when);
+
+    void getDeviceInfo(InputDeviceInfo* outDeviceInfo);
+    int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode);
+    bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+    void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat, int32_t token);
+    void cancelVibrate(int32_t token);
+
+    int32_t getMetaState();
+
+    void fadePointer();
+
+    void bumpGeneration();
+
+    void notifyReset(nsecs_t when);
+
+    inline const PropertyMap& getConfiguration() { return mConfiguration; }
+    inline EventHubInterface* getEventHub() { return mContext->getEventHub(); }
+
+    bool hasKey(int32_t code) {
+        return getEventHub()->hasScanCode(mId, code);
+    }
+
+    bool hasAbsoluteAxis(int32_t code) {
+        RawAbsoluteAxisInfo info;
+        getEventHub()->getAbsoluteAxisInfo(mId, code, &info);
+        return info.valid;
+    }
+
+    bool isKeyPressed(int32_t code) {
+        return getEventHub()->getScanCodeState(mId, code) == AKEY_STATE_DOWN;
+    }
+
+    int32_t getAbsoluteAxisValue(int32_t code) {
+        int32_t value;
+        getEventHub()->getAbsoluteAxisValue(mId, code, &value);
+        return value;
+    }
+
+private:
+    InputReaderContext* mContext;
+    int32_t mId;
+    int32_t mGeneration;
+    int32_t mControllerNumber;
+    InputDeviceIdentifier mIdentifier;
+    String8 mAlias;
+    uint32_t mClasses;
+
+    Vector<InputMapper*> mMappers;
+
+    uint32_t mSources;
+    bool mIsExternal;
+    bool mDropUntilNextSync;
+
+    typedef int32_t (InputMapper::*GetStateFunc)(uint32_t sourceMask, int32_t code);
+    int32_t getState(uint32_t sourceMask, int32_t code, GetStateFunc getStateFunc);
+
+    PropertyMap mConfiguration;
+};
+
+
+/* Keeps track of the state of mouse or touch pad buttons. */
+class CursorButtonAccumulator {
+public:
+    CursorButtonAccumulator();
+    void reset(InputDevice* device);
+
+    void process(const RawEvent* rawEvent);
+
+    uint32_t getButtonState() const;
+
+private:
+    bool mBtnLeft;
+    bool mBtnRight;
+    bool mBtnMiddle;
+    bool mBtnBack;
+    bool mBtnSide;
+    bool mBtnForward;
+    bool mBtnExtra;
+    bool mBtnTask;
+
+    void clearButtons();
+};
+
+
+/* Keeps track of cursor movements. */
+
+class CursorMotionAccumulator {
+public:
+    CursorMotionAccumulator();
+    void reset(InputDevice* device);
+
+    void process(const RawEvent* rawEvent);
+    void finishSync();
+
+    inline int32_t getRelativeX() const { return mRelX; }
+    inline int32_t getRelativeY() const { return mRelY; }
+
+private:
+    int32_t mRelX;
+    int32_t mRelY;
+
+    void clearRelativeAxes();
+};
+
+
+/* Keeps track of cursor scrolling motions. */
+
+class CursorScrollAccumulator {
+public:
+    CursorScrollAccumulator();
+    void configure(InputDevice* device);
+    void reset(InputDevice* device);
+
+    void process(const RawEvent* rawEvent);
+    void finishSync();
+
+    inline bool haveRelativeVWheel() const { return mHaveRelWheel; }
+    inline bool haveRelativeHWheel() const { return mHaveRelHWheel; }
+
+    inline int32_t getRelativeX() const { return mRelX; }
+    inline int32_t getRelativeY() const { return mRelY; }
+    inline int32_t getRelativeVWheel() const { return mRelWheel; }
+    inline int32_t getRelativeHWheel() const { return mRelHWheel; }
+
+private:
+    bool mHaveRelWheel;
+    bool mHaveRelHWheel;
+
+    int32_t mRelX;
+    int32_t mRelY;
+    int32_t mRelWheel;
+    int32_t mRelHWheel;
+
+    void clearRelativeAxes();
+};
+
+
+/* Keeps track of the state of touch, stylus and tool buttons. */
+class TouchButtonAccumulator {
+public:
+    TouchButtonAccumulator();
+    void configure(InputDevice* device);
+    void reset(InputDevice* device);
+
+    void process(const RawEvent* rawEvent);
+
+    uint32_t getButtonState() const;
+    int32_t getToolType() const;
+    bool isToolActive() const;
+    bool isHovering() const;
+    bool hasStylus() const;
+
+private:
+    bool mHaveBtnTouch;
+    bool mHaveStylus;
+
+    bool mBtnTouch;
+    bool mBtnStylus;
+    bool mBtnStylus2;
+    bool mBtnToolFinger;
+    bool mBtnToolPen;
+    bool mBtnToolRubber;
+    bool mBtnToolBrush;
+    bool mBtnToolPencil;
+    bool mBtnToolAirbrush;
+    bool mBtnToolMouse;
+    bool mBtnToolLens;
+    bool mBtnToolDoubleTap;
+    bool mBtnToolTripleTap;
+    bool mBtnToolQuadTap;
+
+    void clearButtons();
+};
+
+
+/* Raw axis information from the driver. */
+struct RawPointerAxes {
+    RawAbsoluteAxisInfo x;
+    RawAbsoluteAxisInfo y;
+    RawAbsoluteAxisInfo pressure;
+    RawAbsoluteAxisInfo touchMajor;
+    RawAbsoluteAxisInfo touchMinor;
+    RawAbsoluteAxisInfo toolMajor;
+    RawAbsoluteAxisInfo toolMinor;
+    RawAbsoluteAxisInfo orientation;
+    RawAbsoluteAxisInfo distance;
+    RawAbsoluteAxisInfo tiltX;
+    RawAbsoluteAxisInfo tiltY;
+    RawAbsoluteAxisInfo trackingId;
+    RawAbsoluteAxisInfo slot;
+
+    RawPointerAxes();
+    void clear();
+};
+
+
+/* Raw data for a collection of pointers including a pointer id mapping table. */
+struct RawPointerData {
+    struct Pointer {
+        uint32_t id;
+        int32_t x;
+        int32_t y;
+        int32_t pressure;
+        int32_t touchMajor;
+        int32_t touchMinor;
+        int32_t toolMajor;
+        int32_t toolMinor;
+        int32_t orientation;
+        int32_t distance;
+        int32_t tiltX;
+        int32_t tiltY;
+        int32_t toolType; // a fully decoded AMOTION_EVENT_TOOL_TYPE constant
+        bool isHovering;
+    };
+
+    uint32_t pointerCount;
+    Pointer pointers[MAX_POINTERS];
+    BitSet32 hoveringIdBits, touchingIdBits;
+    uint32_t idToIndex[MAX_POINTER_ID + 1];
+
+    RawPointerData();
+    void clear();
+    void copyFrom(const RawPointerData& other);
+    void getCentroidOfTouchingPointers(float* outX, float* outY) const;
+
+    inline void markIdBit(uint32_t id, bool isHovering) {
+        if (isHovering) {
+            hoveringIdBits.markBit(id);
+        } else {
+            touchingIdBits.markBit(id);
+        }
+    }
+
+    inline void clearIdBits() {
+        hoveringIdBits.clear();
+        touchingIdBits.clear();
+    }
+
+    inline const Pointer& pointerForId(uint32_t id) const {
+        return pointers[idToIndex[id]];
+    }
+
+    inline bool isHovering(uint32_t pointerIndex) {
+        return pointers[pointerIndex].isHovering;
+    }
+};
+
+
+/* Cooked data for a collection of pointers including a pointer id mapping table. */
+struct CookedPointerData {
+    uint32_t pointerCount;
+    PointerProperties pointerProperties[MAX_POINTERS];
+    PointerCoords pointerCoords[MAX_POINTERS];
+    BitSet32 hoveringIdBits, touchingIdBits;
+    uint32_t idToIndex[MAX_POINTER_ID + 1];
+
+    CookedPointerData();
+    void clear();
+    void copyFrom(const CookedPointerData& other);
+
+    inline const PointerCoords& pointerCoordsForId(uint32_t id) const {
+        return pointerCoords[idToIndex[id]];
+    }
+
+    inline bool isHovering(uint32_t pointerIndex) {
+        return hoveringIdBits.hasBit(pointerProperties[pointerIndex].id);
+    }
+};
+
+
+/* Keeps track of the state of single-touch protocol. */
+class SingleTouchMotionAccumulator {
+public:
+    SingleTouchMotionAccumulator();
+
+    void process(const RawEvent* rawEvent);
+    void reset(InputDevice* device);
+
+    inline int32_t getAbsoluteX() const { return mAbsX; }
+    inline int32_t getAbsoluteY() const { return mAbsY; }
+    inline int32_t getAbsolutePressure() const { return mAbsPressure; }
+    inline int32_t getAbsoluteToolWidth() const { return mAbsToolWidth; }
+    inline int32_t getAbsoluteDistance() const { return mAbsDistance; }
+    inline int32_t getAbsoluteTiltX() const { return mAbsTiltX; }
+    inline int32_t getAbsoluteTiltY() const { return mAbsTiltY; }
+
+private:
+    int32_t mAbsX;
+    int32_t mAbsY;
+    int32_t mAbsPressure;
+    int32_t mAbsToolWidth;
+    int32_t mAbsDistance;
+    int32_t mAbsTiltX;
+    int32_t mAbsTiltY;
+
+    void clearAbsoluteAxes();
+};
+
+
+/* Keeps track of the state of multi-touch protocol. */
+class MultiTouchMotionAccumulator {
+public:
+    class Slot {
+    public:
+        inline bool isInUse() const { return mInUse; }
+        inline int32_t getX() const { return mAbsMTPositionX; }
+        inline int32_t getY() const { return mAbsMTPositionY; }
+        inline int32_t getTouchMajor() const { return mAbsMTTouchMajor; }
+        inline int32_t getTouchMinor() const {
+            return mHaveAbsMTTouchMinor ? mAbsMTTouchMinor : mAbsMTTouchMajor; }
+        inline int32_t getToolMajor() const { return mAbsMTWidthMajor; }
+        inline int32_t getToolMinor() const {
+            return mHaveAbsMTWidthMinor ? mAbsMTWidthMinor : mAbsMTWidthMajor; }
+        inline int32_t getOrientation() const { return mAbsMTOrientation; }
+        inline int32_t getTrackingId() const { return mAbsMTTrackingId; }
+        inline int32_t getPressure() const { return mAbsMTPressure; }
+        inline int32_t getDistance() const { return mAbsMTDistance; }
+        inline int32_t getToolType() const;
+
+    private:
+        friend class MultiTouchMotionAccumulator;
+
+        bool mInUse;
+        bool mHaveAbsMTTouchMinor;
+        bool mHaveAbsMTWidthMinor;
+        bool mHaveAbsMTToolType;
+
+        int32_t mAbsMTPositionX;
+        int32_t mAbsMTPositionY;
+        int32_t mAbsMTTouchMajor;
+        int32_t mAbsMTTouchMinor;
+        int32_t mAbsMTWidthMajor;
+        int32_t mAbsMTWidthMinor;
+        int32_t mAbsMTOrientation;
+        int32_t mAbsMTTrackingId;
+        int32_t mAbsMTPressure;
+        int32_t mAbsMTDistance;
+        int32_t mAbsMTToolType;
+
+        Slot();
+        void clear();
+    };
+
+    MultiTouchMotionAccumulator();
+    ~MultiTouchMotionAccumulator();
+
+    void configure(InputDevice* device, size_t slotCount, bool usingSlotsProtocol);
+    void reset(InputDevice* device);
+    void process(const RawEvent* rawEvent);
+    void finishSync();
+    bool hasStylus() const;
+
+    inline size_t getSlotCount() const { return mSlotCount; }
+    inline const Slot* getSlot(size_t index) const { return &mSlots[index]; }
+
+private:
+    int32_t mCurrentSlot;
+    Slot* mSlots;
+    size_t mSlotCount;
+    bool mUsingSlotsProtocol;
+    bool mHaveStylus;
+
+    void clearSlots(int32_t initialSlot);
+};
+
+
+/* An input mapper transforms raw input events into cooked event data.
+ * A single input device can have multiple associated input mappers in order to interpret
+ * different classes of events.
+ *
+ * InputMapper lifecycle:
+ * - create
+ * - configure with 0 changes
+ * - reset
+ * - process, process, process (may occasionally reconfigure with non-zero changes or reset)
+ * - reset
+ * - destroy
+ */
+class InputMapper {
+public:
+    InputMapper(InputDevice* device);
+    virtual ~InputMapper();
+
+    inline InputDevice* getDevice() { return mDevice; }
+    inline int32_t getDeviceId() { return mDevice->getId(); }
+    inline const String8 getDeviceName() { return mDevice->getName(); }
+    inline InputReaderContext* getContext() { return mContext; }
+    inline InputReaderPolicyInterface* getPolicy() { return mContext->getPolicy(); }
+    inline InputListenerInterface* getListener() { return mContext->getListener(); }
+    inline EventHubInterface* getEventHub() { return mContext->getEventHub(); }
+
+    virtual uint32_t getSources() = 0;
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void dump(String8& dump);
+    virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent) = 0;
+    virtual void timeoutExpired(nsecs_t when);
+
+    virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode);
+    virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+    virtual void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+            int32_t token);
+    virtual void cancelVibrate(int32_t token);
+
+    virtual int32_t getMetaState();
+
+    virtual void fadePointer();
+
+protected:
+    InputDevice* mDevice;
+    InputReaderContext* mContext;
+
+    status_t getAbsoluteAxisInfo(int32_t axis, RawAbsoluteAxisInfo* axisInfo);
+    void bumpGeneration();
+
+    static void dumpRawAbsoluteAxisInfo(String8& dump,
+            const RawAbsoluteAxisInfo& axis, const char* name);
+};
+
+
+class SwitchInputMapper : public InputMapper {
+public:
+    SwitchInputMapper(InputDevice* device);
+    virtual ~SwitchInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual int32_t getSwitchState(uint32_t sourceMask, int32_t switchCode);
+
+private:
+    uint32_t mUpdatedSwitchValues;
+    uint32_t mUpdatedSwitchMask;
+
+    void processSwitch(int32_t switchCode, int32_t switchValue);
+    void sync(nsecs_t when);
+};
+
+
+class VibratorInputMapper : public InputMapper {
+public:
+    VibratorInputMapper(InputDevice* device);
+    virtual ~VibratorInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual void vibrate(const nsecs_t* pattern, size_t patternSize, ssize_t repeat,
+            int32_t token);
+    virtual void cancelVibrate(int32_t token);
+    virtual void timeoutExpired(nsecs_t when);
+    virtual void dump(String8& dump);
+
+private:
+    bool mVibrating;
+    nsecs_t mPattern[MAX_VIBRATE_PATTERN_SIZE];
+    size_t mPatternSize;
+    ssize_t mRepeat;
+    int32_t mToken;
+    ssize_t mIndex;
+    nsecs_t mNextStepTime;
+
+    void nextStep();
+    void stopVibrating();
+};
+
+
+class KeyboardInputMapper : public InputMapper {
+public:
+    KeyboardInputMapper(InputDevice* device, uint32_t source, int32_t keyboardType);
+    virtual ~KeyboardInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void dump(String8& dump);
+    virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+
+    virtual int32_t getMetaState();
+
+private:
+    struct KeyDown {
+        int32_t keyCode;
+        int32_t scanCode;
+    };
+
+    uint32_t mSource;
+    int32_t mKeyboardType;
+
+    int32_t mOrientation; // orientation for dpad keys
+
+    Vector<KeyDown> mKeyDowns; // keys that are down
+    int32_t mMetaState;
+    nsecs_t mDownTime; // time of most recent key down
+
+    int32_t mCurrentHidUsage; // most recent HID usage seen this packet, or 0 if none
+
+    struct LedState {
+        bool avail; // led is available
+        bool on;    // we think the led is currently on
+    };
+    LedState mCapsLockLedState;
+    LedState mNumLockLedState;
+    LedState mScrollLockLedState;
+
+    // Immutable configuration parameters.
+    struct Parameters {
+        bool hasAssociatedDisplay;
+        bool orientationAware;
+    } mParameters;
+
+    void configureParameters();
+    void dumpParameters(String8& dump);
+
+    bool isKeyboardOrGamepadKey(int32_t scanCode);
+
+    void processKey(nsecs_t when, bool down, int32_t keyCode, int32_t scanCode,
+            uint32_t policyFlags);
+
+    ssize_t findKeyDown(int32_t scanCode);
+
+    void resetLedState();
+    void initializeLedState(LedState& ledState, int32_t led);
+    void updateLedState(bool reset);
+    void updateLedStateForModifier(LedState& ledState, int32_t led,
+            int32_t modifier, bool reset);
+};
+
+
+class CursorInputMapper : public InputMapper {
+public:
+    CursorInputMapper(InputDevice* device);
+    virtual ~CursorInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void dump(String8& dump);
+    virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+
+    virtual void fadePointer();
+
+private:
+    // Amount that trackball needs to move in order to generate a key event.
+    static const int32_t TRACKBALL_MOVEMENT_THRESHOLD = 6;
+
+    // Immutable configuration parameters.
+    struct Parameters {
+        enum Mode {
+            MODE_POINTER,
+            MODE_NAVIGATION,
+        };
+
+        Mode mode;
+        bool hasAssociatedDisplay;
+        bool orientationAware;
+    } mParameters;
+
+    CursorButtonAccumulator mCursorButtonAccumulator;
+    CursorMotionAccumulator mCursorMotionAccumulator;
+    CursorScrollAccumulator mCursorScrollAccumulator;
+
+    int32_t mSource;
+    float mXScale;
+    float mYScale;
+    float mXPrecision;
+    float mYPrecision;
+
+    float mVWheelScale;
+    float mHWheelScale;
+
+    // Velocity controls for mouse pointer and wheel movements.
+    // The controls for X and Y wheel movements are separate to keep them decoupled.
+    VelocityControl mPointerVelocityControl;
+    VelocityControl mWheelXVelocityControl;
+    VelocityControl mWheelYVelocityControl;
+
+    int32_t mOrientation;
+
+    sp<PointerControllerInterface> mPointerController;
+
+    int32_t mButtonState;
+    nsecs_t mDownTime;
+
+    void configureParameters();
+    void dumpParameters(String8& dump);
+
+    void sync(nsecs_t when);
+};
+
+
+class TouchInputMapper : public InputMapper {
+public:
+    TouchInputMapper(InputDevice* device);
+    virtual ~TouchInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void dump(String8& dump);
+    virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent);
+
+    virtual int32_t getKeyCodeState(uint32_t sourceMask, int32_t keyCode);
+    virtual int32_t getScanCodeState(uint32_t sourceMask, int32_t scanCode);
+    virtual bool markSupportedKeyCodes(uint32_t sourceMask, size_t numCodes,
+            const int32_t* keyCodes, uint8_t* outFlags);
+
+    virtual void fadePointer();
+    virtual void timeoutExpired(nsecs_t when);
+
+protected:
+    CursorButtonAccumulator mCursorButtonAccumulator;
+    CursorScrollAccumulator mCursorScrollAccumulator;
+    TouchButtonAccumulator mTouchButtonAccumulator;
+
+    struct VirtualKey {
+        int32_t keyCode;
+        int32_t scanCode;
+        uint32_t flags;
+
+        // computed hit box, specified in touch screen coords based on known display size
+        int32_t hitLeft;
+        int32_t hitTop;
+        int32_t hitRight;
+        int32_t hitBottom;
+
+        inline bool isHit(int32_t x, int32_t y) const {
+            return x >= hitLeft && x <= hitRight && y >= hitTop && y <= hitBottom;
+        }
+    };
+
+    // Input sources and device mode.
+    uint32_t mSource;
+
+    enum DeviceMode {
+        DEVICE_MODE_DISABLED, // input is disabled
+        DEVICE_MODE_DIRECT, // direct mapping (touchscreen)
+        DEVICE_MODE_UNSCALED, // unscaled mapping (touchpad)
+        DEVICE_MODE_NAVIGATION, // unscaled mapping with assist gesture (touch navigation)
+        DEVICE_MODE_POINTER, // pointer mapping (pointer)
+    };
+    DeviceMode mDeviceMode;
+
+    // The reader's configuration.
+    InputReaderConfiguration mConfig;
+
+    // Immutable configuration parameters.
+    struct Parameters {
+        enum DeviceType {
+            DEVICE_TYPE_TOUCH_SCREEN,
+            DEVICE_TYPE_TOUCH_PAD,
+            DEVICE_TYPE_TOUCH_NAVIGATION,
+            DEVICE_TYPE_POINTER,
+        };
+
+        DeviceType deviceType;
+        bool hasAssociatedDisplay;
+        bool associatedDisplayIsExternal;
+        bool orientationAware;
+        bool hasButtonUnderPad;
+
+        enum GestureMode {
+            GESTURE_MODE_POINTER,
+            GESTURE_MODE_SPOTS,
+        };
+        GestureMode gestureMode;
+    } mParameters;
+
+    // Immutable calibration parameters in parsed form.
+    struct Calibration {
+        // Size
+        enum SizeCalibration {
+            SIZE_CALIBRATION_DEFAULT,
+            SIZE_CALIBRATION_NONE,
+            SIZE_CALIBRATION_GEOMETRIC,
+            SIZE_CALIBRATION_DIAMETER,
+            SIZE_CALIBRATION_BOX,
+            SIZE_CALIBRATION_AREA,
+        };
+
+        SizeCalibration sizeCalibration;
+
+        bool haveSizeScale;
+        float sizeScale;
+        bool haveSizeBias;
+        float sizeBias;
+        bool haveSizeIsSummed;
+        bool sizeIsSummed;
+
+        // Pressure
+        enum PressureCalibration {
+            PRESSURE_CALIBRATION_DEFAULT,
+            PRESSURE_CALIBRATION_NONE,
+            PRESSURE_CALIBRATION_PHYSICAL,
+            PRESSURE_CALIBRATION_AMPLITUDE,
+        };
+
+        PressureCalibration pressureCalibration;
+        bool havePressureScale;
+        float pressureScale;
+
+        // Orientation
+        enum OrientationCalibration {
+            ORIENTATION_CALIBRATION_DEFAULT,
+            ORIENTATION_CALIBRATION_NONE,
+            ORIENTATION_CALIBRATION_INTERPOLATED,
+            ORIENTATION_CALIBRATION_VECTOR,
+        };
+
+        OrientationCalibration orientationCalibration;
+
+        // Distance
+        enum DistanceCalibration {
+            DISTANCE_CALIBRATION_DEFAULT,
+            DISTANCE_CALIBRATION_NONE,
+            DISTANCE_CALIBRATION_SCALED,
+        };
+
+        DistanceCalibration distanceCalibration;
+        bool haveDistanceScale;
+        float distanceScale;
+
+        enum CoverageCalibration {
+            COVERAGE_CALIBRATION_DEFAULT,
+            COVERAGE_CALIBRATION_NONE,
+            COVERAGE_CALIBRATION_BOX,
+        };
+
+        CoverageCalibration coverageCalibration;
+
+        inline void applySizeScaleAndBias(float* outSize) const {
+            if (haveSizeScale) {
+                *outSize *= sizeScale;
+            }
+            if (haveSizeBias) {
+                *outSize += sizeBias;
+            }
+            if (*outSize < 0) {
+                *outSize = 0;
+            }
+        }
+    } mCalibration;
+
+    // Raw pointer axis information from the driver.
+    RawPointerAxes mRawPointerAxes;
+
+    // Raw pointer sample data.
+    RawPointerData mCurrentRawPointerData;
+    RawPointerData mLastRawPointerData;
+
+    // Cooked pointer sample data.
+    CookedPointerData mCurrentCookedPointerData;
+    CookedPointerData mLastCookedPointerData;
+
+    // Button state.
+    int32_t mCurrentButtonState;
+    int32_t mLastButtonState;
+
+    // Scroll state.
+    int32_t mCurrentRawVScroll;
+    int32_t mCurrentRawHScroll;
+
+    // Id bits used to differentiate fingers, stylus and mouse tools.
+    BitSet32 mCurrentFingerIdBits; // finger or unknown
+    BitSet32 mLastFingerIdBits;
+    BitSet32 mCurrentStylusIdBits; // stylus or eraser
+    BitSet32 mLastStylusIdBits;
+    BitSet32 mCurrentMouseIdBits; // mouse or lens
+    BitSet32 mLastMouseIdBits;
+
+    // True if we sent a HOVER_ENTER event.
+    bool mSentHoverEnter;
+
+    // The time the primary pointer last went down.
+    nsecs_t mDownTime;
+
+    // The pointer controller, or null if the device is not a pointer.
+    sp<PointerControllerInterface> mPointerController;
+
+    Vector<VirtualKey> mVirtualKeys;
+
+    virtual void configureParameters();
+    virtual void dumpParameters(String8& dump);
+    virtual void configureRawPointerAxes();
+    virtual void dumpRawPointerAxes(String8& dump);
+    virtual void configureSurface(nsecs_t when, bool* outResetNeeded);
+    virtual void dumpSurface(String8& dump);
+    virtual void configureVirtualKeys();
+    virtual void dumpVirtualKeys(String8& dump);
+    virtual void parseCalibration();
+    virtual void resolveCalibration();
+    virtual void dumpCalibration(String8& dump);
+    virtual bool hasStylus() const = 0;
+
+    virtual void syncTouch(nsecs_t when, bool* outHavePointerIds) = 0;
+
+private:
+    // The current viewport.
+    // The components of the viewport are specified in the display's rotated orientation.
+    DisplayViewport mViewport;
+
+    // The surface orientation, width and height set by configureSurface().
+    // The width and height are derived from the viewport but are specified
+    // in the natural orientation.
+    // The surface origin specifies how the surface coordinates should be translated
+    // to align with the logical display coordinate space.
+    // The orientation may be different from the viewport orientation as it specifies
+    // the rotation of the surface coordinates required to produce the viewport's
+    // requested orientation, so it will depend on whether the device is orientation aware.
+    int32_t mSurfaceWidth;
+    int32_t mSurfaceHeight;
+    int32_t mSurfaceLeft;
+    int32_t mSurfaceTop;
+    int32_t mSurfaceOrientation;
+
+    // Translation and scaling factors, orientation-independent.
+    float mXTranslate;
+    float mXScale;
+    float mXPrecision;
+
+    float mYTranslate;
+    float mYScale;
+    float mYPrecision;
+
+    float mGeometricScale;
+
+    float mPressureScale;
+
+    float mSizeScale;
+
+    float mOrientationScale;
+
+    float mDistanceScale;
+
+    bool mHaveTilt;
+    float mTiltXCenter;
+    float mTiltXScale;
+    float mTiltYCenter;
+    float mTiltYScale;
+
+    // Oriented motion ranges for input device info.
+    struct OrientedRanges {
+        InputDeviceInfo::MotionRange x;
+        InputDeviceInfo::MotionRange y;
+        InputDeviceInfo::MotionRange pressure;
+
+        bool haveSize;
+        InputDeviceInfo::MotionRange size;
+
+        bool haveTouchSize;
+        InputDeviceInfo::MotionRange touchMajor;
+        InputDeviceInfo::MotionRange touchMinor;
+
+        bool haveToolSize;
+        InputDeviceInfo::MotionRange toolMajor;
+        InputDeviceInfo::MotionRange toolMinor;
+
+        bool haveOrientation;
+        InputDeviceInfo::MotionRange orientation;
+
+        bool haveDistance;
+        InputDeviceInfo::MotionRange distance;
+
+        bool haveTilt;
+        InputDeviceInfo::MotionRange tilt;
+
+        OrientedRanges() {
+            clear();
+        }
+
+        void clear() {
+            haveSize = false;
+            haveTouchSize = false;
+            haveToolSize = false;
+            haveOrientation = false;
+            haveDistance = false;
+            haveTilt = false;
+        }
+    } mOrientedRanges;
+
+    // Oriented dimensions and precision.
+    float mOrientedXPrecision;
+    float mOrientedYPrecision;
+
+    struct CurrentVirtualKeyState {
+        bool down;
+        bool ignored;
+        nsecs_t downTime;
+        int32_t keyCode;
+        int32_t scanCode;
+    } mCurrentVirtualKey;
+
+    // Scale factor for gesture or mouse based pointer movements.
+    float mPointerXMovementScale;
+    float mPointerYMovementScale;
+
+    // Scale factor for gesture based zooming and other freeform motions.
+    float mPointerXZoomScale;
+    float mPointerYZoomScale;
+
+    // The maximum swipe width.
+    float mPointerGestureMaxSwipeWidth;
+
+    struct PointerDistanceHeapElement {
+        uint32_t currentPointerIndex : 8;
+        uint32_t lastPointerIndex : 8;
+        uint64_t distance : 48; // squared distance
+    };
+
+    enum PointerUsage {
+        POINTER_USAGE_NONE,
+        POINTER_USAGE_GESTURES,
+        POINTER_USAGE_STYLUS,
+        POINTER_USAGE_MOUSE,
+    };
+    PointerUsage mPointerUsage;
+
+    struct PointerGesture {
+        enum Mode {
+            // No fingers, button is not pressed.
+            // Nothing happening.
+            NEUTRAL,
+
+            // No fingers, button is not pressed.
+            // Tap detected.
+            // Emits DOWN and UP events at the pointer location.
+            TAP,
+
+            // Exactly one finger dragging following a tap.
+            // Pointer follows the active finger.
+            // Emits DOWN, MOVE and UP events at the pointer location.
+            //
+            // Detect double-taps when the finger goes up while in TAP_DRAG mode.
+            TAP_DRAG,
+
+            // Button is pressed.
+            // Pointer follows the active finger if there is one.  Other fingers are ignored.
+            // Emits DOWN, MOVE and UP events at the pointer location.
+            BUTTON_CLICK_OR_DRAG,
+
+            // Exactly one finger, button is not pressed.
+            // Pointer follows the active finger.
+            // Emits HOVER_MOVE events at the pointer location.
+            //
+            // Detect taps when the finger goes up while in HOVER mode.
+            HOVER,
+
+            // Exactly two fingers but neither have moved enough to clearly indicate
+            // whether a swipe or freeform gesture was intended.  We consider the
+            // pointer to be pressed so this enables clicking or long-pressing on buttons.
+            // Pointer does not move.
+            // Emits DOWN, MOVE and UP events with a single stationary pointer coordinate.
+            PRESS,
+
+            // Exactly two fingers moving in the same direction, button is not pressed.
+            // Pointer does not move.
+            // Emits DOWN, MOVE and UP events with a single pointer coordinate that
+            // follows the midpoint between both fingers.
+            SWIPE,
+
+            // Two or more fingers moving in arbitrary directions, button is not pressed.
+            // Pointer does not move.
+            // Emits DOWN, POINTER_DOWN, MOVE, POINTER_UP and UP events that follow
+            // each finger individually relative to the initial centroid of the finger.
+            FREEFORM,
+
+            // Waiting for quiet time to end before starting the next gesture.
+            QUIET,
+        };
+
+        // Time the first finger went down.
+        nsecs_t firstTouchTime;
+
+        // The active pointer id from the raw touch data.
+        int32_t activeTouchId; // -1 if none
+
+        // The active pointer id from the gesture last delivered to the application.
+        int32_t activeGestureId; // -1 if none
+
+        // Pointer coords and ids for the current and previous pointer gesture.
+        Mode currentGestureMode;
+        BitSet32 currentGestureIdBits;
+        uint32_t currentGestureIdToIndex[MAX_POINTER_ID + 1];
+        PointerProperties currentGestureProperties[MAX_POINTERS];
+        PointerCoords currentGestureCoords[MAX_POINTERS];
+
+        Mode lastGestureMode;
+        BitSet32 lastGestureIdBits;
+        uint32_t lastGestureIdToIndex[MAX_POINTER_ID + 1];
+        PointerProperties lastGestureProperties[MAX_POINTERS];
+        PointerCoords lastGestureCoords[MAX_POINTERS];
+
+        // Time the pointer gesture last went down.
+        nsecs_t downTime;
+
+        // Time when the pointer went down for a TAP.
+        nsecs_t tapDownTime;
+
+        // Time when the pointer went up for a TAP.
+        nsecs_t tapUpTime;
+
+        // Location of initial tap.
+        float tapX, tapY;
+
+        // Time we started waiting for quiescence.
+        nsecs_t quietTime;
+
+        // Reference points for multitouch gestures.
+        float referenceTouchX;    // reference touch X/Y coordinates in surface units
+        float referenceTouchY;
+        float referenceGestureX;  // reference gesture X/Y coordinates in pixels
+        float referenceGestureY;
+
+        // Distance that each pointer has traveled which has not yet been
+        // subsumed into the reference gesture position.
+        BitSet32 referenceIdBits;
+        struct Delta {
+            float dx, dy;
+        };
+        Delta referenceDeltas[MAX_POINTER_ID + 1];
+
+        // Describes how touch ids are mapped to gesture ids for freeform gestures.
+        uint32_t freeformTouchToGestureIdMap[MAX_POINTER_ID + 1];
+
+        // A velocity tracker for determining whether to switch active pointers during drags.
+        VelocityTracker velocityTracker;
+
+        void reset() {
+            firstTouchTime = LLONG_MIN;
+            activeTouchId = -1;
+            activeGestureId = -1;
+            currentGestureMode = NEUTRAL;
+            currentGestureIdBits.clear();
+            lastGestureMode = NEUTRAL;
+            lastGestureIdBits.clear();
+            downTime = 0;
+            velocityTracker.clear();
+            resetTap();
+            resetQuietTime();
+        }
+
+        void resetTap() {
+            tapDownTime = LLONG_MIN;
+            tapUpTime = LLONG_MIN;
+        }
+
+        void resetQuietTime() {
+            quietTime = LLONG_MIN;
+        }
+    } mPointerGesture;
+
+    struct PointerSimple {
+        PointerCoords currentCoords;
+        PointerProperties currentProperties;
+        PointerCoords lastCoords;
+        PointerProperties lastProperties;
+
+        // True if the pointer is down.
+        bool down;
+
+        // True if the pointer is hovering.
+        bool hovering;
+
+        // Time the pointer last went down.
+        nsecs_t downTime;
+
+        void reset() {
+            currentCoords.clear();
+            currentProperties.clear();
+            lastCoords.clear();
+            lastProperties.clear();
+            down = false;
+            hovering = false;
+            downTime = 0;
+        }
+    } mPointerSimple;
+
+    // The pointer and scroll velocity controls.
+    VelocityControl mPointerVelocityControl;
+    VelocityControl mWheelXVelocityControl;
+    VelocityControl mWheelYVelocityControl;
+
+    void sync(nsecs_t when);
+
+    bool consumeRawTouches(nsecs_t when, uint32_t policyFlags);
+    void dispatchVirtualKey(nsecs_t when, uint32_t policyFlags,
+            int32_t keyEventAction, int32_t keyEventFlags);
+
+    void dispatchTouches(nsecs_t when, uint32_t policyFlags);
+    void dispatchHoverExit(nsecs_t when, uint32_t policyFlags);
+    void dispatchHoverEnterAndMove(nsecs_t when, uint32_t policyFlags);
+    void cookPointerData();
+
+    void dispatchPointerUsage(nsecs_t when, uint32_t policyFlags, PointerUsage pointerUsage);
+    void abortPointerUsage(nsecs_t when, uint32_t policyFlags);
+
+    void dispatchPointerGestures(nsecs_t when, uint32_t policyFlags, bool isTimeout);
+    void abortPointerGestures(nsecs_t when, uint32_t policyFlags);
+    bool preparePointerGestures(nsecs_t when,
+            bool* outCancelPreviousGesture, bool* outFinishPreviousGesture,
+            bool isTimeout);
+
+    void dispatchPointerStylus(nsecs_t when, uint32_t policyFlags);
+    void abortPointerStylus(nsecs_t when, uint32_t policyFlags);
+
+    void dispatchPointerMouse(nsecs_t when, uint32_t policyFlags);
+    void abortPointerMouse(nsecs_t when, uint32_t policyFlags);
+
+    void dispatchPointerSimple(nsecs_t when, uint32_t policyFlags,
+            bool down, bool hovering);
+    void abortPointerSimple(nsecs_t when, uint32_t policyFlags);
+
+    // Dispatches a motion event.
+    // If the changedId is >= 0 and the action is POINTER_DOWN or POINTER_UP, the
+    // method will take care of setting the index and transmuting the action to DOWN or UP
+    // it is the first / last pointer to go down / up.
+    void dispatchMotion(nsecs_t when, uint32_t policyFlags, uint32_t source,
+            int32_t action, int32_t flags, int32_t metaState, int32_t buttonState,
+            int32_t edgeFlags,
+            const PointerProperties* properties, const PointerCoords* coords,
+            const uint32_t* idToIndex, BitSet32 idBits,
+            int32_t changedId, float xPrecision, float yPrecision, nsecs_t downTime);
+
+    // Updates pointer coords and properties for pointers with specified ids that have moved.
+    // Returns true if any of them changed.
+    bool updateMovedPointers(const PointerProperties* inProperties,
+            const PointerCoords* inCoords, const uint32_t* inIdToIndex,
+            PointerProperties* outProperties, PointerCoords* outCoords,
+            const uint32_t* outIdToIndex, BitSet32 idBits) const;
+
+    bool isPointInsideSurface(int32_t x, int32_t y);
+    const VirtualKey* findVirtualKeyHit(int32_t x, int32_t y);
+
+    void assignPointerIds();
+};
+
+
+class SingleTouchInputMapper : public TouchInputMapper {
+public:
+    SingleTouchInputMapper(InputDevice* device);
+    virtual ~SingleTouchInputMapper();
+
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent);
+
+protected:
+    virtual void syncTouch(nsecs_t when, bool* outHavePointerIds);
+    virtual void configureRawPointerAxes();
+    virtual bool hasStylus() const;
+
+private:
+    SingleTouchMotionAccumulator mSingleTouchMotionAccumulator;
+};
+
+
+class MultiTouchInputMapper : public TouchInputMapper {
+public:
+    MultiTouchInputMapper(InputDevice* device);
+    virtual ~MultiTouchInputMapper();
+
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent);
+
+protected:
+    virtual void syncTouch(nsecs_t when, bool* outHavePointerIds);
+    virtual void configureRawPointerAxes();
+    virtual bool hasStylus() const;
+
+private:
+    MultiTouchMotionAccumulator mMultiTouchMotionAccumulator;
+
+    // Specifies the pointer id bits that are in use, and their associated tracking id.
+    BitSet32 mPointerIdBits;
+    int32_t mPointerTrackingIdMap[MAX_POINTER_ID + 1];
+};
+
+
+class JoystickInputMapper : public InputMapper {
+public:
+    JoystickInputMapper(InputDevice* device);
+    virtual ~JoystickInputMapper();
+
+    virtual uint32_t getSources();
+    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
+    virtual void dump(String8& dump);
+    virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
+    virtual void reset(nsecs_t when);
+    virtual void process(const RawEvent* rawEvent);
+
+private:
+    struct Axis {
+        RawAbsoluteAxisInfo rawAxisInfo;
+        AxisInfo axisInfo;
+
+        bool explicitlyMapped; // true if the axis was explicitly assigned an axis id
+
+        float scale;   // scale factor from raw to normalized values
+        float offset;  // offset to add after scaling for normalization
+        float highScale;  // scale factor from raw to normalized values of high split
+        float highOffset; // offset to add after scaling for normalization of high split
+
+        float min;        // normalized inclusive minimum
+        float max;        // normalized inclusive maximum
+        float flat;       // normalized flat region size
+        float fuzz;       // normalized error tolerance
+        float resolution; // normalized resolution in units/mm
+
+        float filter;  // filter out small variations of this size
+        float currentValue; // current value
+        float newValue; // most recent value
+        float highCurrentValue; // current value of high split
+        float highNewValue; // most recent value of high split
+
+        void initialize(const RawAbsoluteAxisInfo& rawAxisInfo, const AxisInfo& axisInfo,
+                bool explicitlyMapped, float scale, float offset,
+                float highScale, float highOffset,
+                float min, float max, float flat, float fuzz, float resolution) {
+            this->rawAxisInfo = rawAxisInfo;
+            this->axisInfo = axisInfo;
+            this->explicitlyMapped = explicitlyMapped;
+            this->scale = scale;
+            this->offset = offset;
+            this->highScale = highScale;
+            this->highOffset = highOffset;
+            this->min = min;
+            this->max = max;
+            this->flat = flat;
+            this->fuzz = fuzz;
+            this->resolution = resolution;
+            this->filter = 0;
+            resetValue();
+        }
+
+        void resetValue() {
+            this->currentValue = 0;
+            this->newValue = 0;
+            this->highCurrentValue = 0;
+            this->highNewValue = 0;
+        }
+    };
+
+    // Axes indexed by raw ABS_* axis index.
+    KeyedVector<int32_t, Axis> mAxes;
+
+    void sync(nsecs_t when, bool force);
+
+    bool haveAxis(int32_t axisId);
+    void pruneAxes(bool ignoreExplicitlyMappedAxes);
+    bool filterAxes(bool force);
+
+    static bool hasValueChangedSignificantly(float filter,
+            float newValue, float currentValue, float min, float max);
+    static bool hasMovedNearerToValueWithinFilteredRange(float filter,
+            float newValue, float currentValue, float thresholdValue);
+
+    static bool isCenteredAxis(int32_t axis);
+    static int32_t getCompatAxis(int32_t axis);
+
+    static void addMotionRange(int32_t axisId, const Axis& axis, InputDeviceInfo* info);
+    static void setPointerCoordsAxisValue(PointerCoords* pointerCoords, int32_t axis,
+            float value);
+};
+
+} // namespace android
+
+#endif // _UI_INPUT_READER_H
diff --git a/libs/input/InputWindow.cpp b/libs/input/InputWindow.cpp
new file mode 100644
index 0000000..da59159
--- /dev/null
+++ b/libs/input/InputWindow.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "InputWindow"
+#define LOG_NDEBUG 0
+
+#include "InputWindow.h"
+
+#include <cutils/log.h>
+
+#include <ui/Rect.h>
+#include <ui/Region.h>
+
+namespace android {
+
+// --- InputWindowInfo ---
+void InputWindowInfo::addTouchableRegion(const Rect& region) {
+    touchableRegion.orSelf(region);
+}
+
+bool InputWindowInfo::touchableRegionContainsPoint(int32_t x, int32_t y) const {
+    return touchableRegion.contains(x,y);
+}
+
+bool InputWindowInfo::frameContainsPoint(int32_t x, int32_t y) const {
+    return x >= frameLeft && x <= frameRight
+            && y >= frameTop && y <= frameBottom;
+}
+
+bool InputWindowInfo::isTrustedOverlay() const {
+    return layoutParamsType == TYPE_INPUT_METHOD
+            || layoutParamsType == TYPE_INPUT_METHOD_DIALOG
+            || layoutParamsType == TYPE_SECURE_SYSTEM_OVERLAY;
+}
+
+bool InputWindowInfo::supportsSplitTouch() const {
+    return layoutParamsFlags & FLAG_SPLIT_TOUCH;
+}
+
+
+// --- InputWindowHandle ---
+
+InputWindowHandle::InputWindowHandle(const sp<InputApplicationHandle>& inputApplicationHandle) :
+    inputApplicationHandle(inputApplicationHandle), mInfo(NULL) {
+}
+
+InputWindowHandle::~InputWindowHandle() {
+    delete mInfo;
+}
+
+void InputWindowHandle::releaseInfo() {
+    if (mInfo) {
+        delete mInfo;
+        mInfo = NULL;
+    }
+}
+
+} // namespace android
diff --git a/libs/input/InputWindow.h b/libs/input/InputWindow.h
new file mode 100644
index 0000000..9618ffe
--- /dev/null
+++ b/libs/input/InputWindow.h
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _UI_INPUT_WINDOW_H
+#define _UI_INPUT_WINDOW_H
+
+#include <input/Input.h>
+#include <input/InputTransport.h>
+#include <ui/Rect.h>
+#include <ui/Region.h>
+#include <utils/RefBase.h>
+#include <utils/Timers.h>
+#include <utils/String8.h>
+
+#include "InputApplication.h"
+
+namespace android {
+
+
+/*
+ * Describes the properties of a window that can receive input.
+ */
+struct InputWindowInfo {
+    // Window flags from WindowManager.LayoutParams
+    enum {
+        FLAG_ALLOW_LOCK_WHILE_SCREEN_ON     = 0x00000001,
+        FLAG_DIM_BEHIND        = 0x00000002,
+        FLAG_BLUR_BEHIND        = 0x00000004,
+        FLAG_NOT_FOCUSABLE      = 0x00000008,
+        FLAG_NOT_TOUCHABLE      = 0x00000010,
+        FLAG_NOT_TOUCH_MODAL    = 0x00000020,
+        FLAG_TOUCHABLE_WHEN_WAKING = 0x00000040,
+        FLAG_KEEP_SCREEN_ON     = 0x00000080,
+        FLAG_LAYOUT_IN_SCREEN   = 0x00000100,
+        FLAG_LAYOUT_NO_LIMITS   = 0x00000200,
+        FLAG_FULLSCREEN      = 0x00000400,
+        FLAG_FORCE_NOT_FULLSCREEN   = 0x00000800,
+        FLAG_DITHER             = 0x00001000,
+        FLAG_SECURE             = 0x00002000,
+        FLAG_SCALED             = 0x00004000,
+        FLAG_IGNORE_CHEEK_PRESSES    = 0x00008000,
+        FLAG_LAYOUT_INSET_DECOR = 0x00010000,
+        FLAG_ALT_FOCUSABLE_IM = 0x00020000,
+        FLAG_WATCH_OUTSIDE_TOUCH = 0x00040000,
+        FLAG_SHOW_WHEN_LOCKED = 0x00080000,
+        FLAG_SHOW_WALLPAPER = 0x00100000,
+        FLAG_TURN_SCREEN_ON = 0x00200000,
+        FLAG_DISMISS_KEYGUARD = 0x00400000,
+        FLAG_SPLIT_TOUCH = 0x00800000,
+        FLAG_SLIPPERY = 0x20000000,
+        FLAG_NEEDS_MENU_KEY = 0x40000000,
+    };
+
+    // Private Window flags from WindowManager.LayoutParams
+    enum {
+        PRIVATE_FLAG_SYSTEM_ERROR = 0x00000100,
+    };
+
+    // Window types from WindowManager.LayoutParams
+    enum {
+        FIRST_APPLICATION_WINDOW = 1,
+        TYPE_BASE_APPLICATION   = 1,
+        TYPE_APPLICATION        = 2,
+        TYPE_APPLICATION_STARTING = 3,
+        LAST_APPLICATION_WINDOW = 99,
+        FIRST_SUB_WINDOW        = 1000,
+        TYPE_APPLICATION_PANEL  = FIRST_SUB_WINDOW,
+        TYPE_APPLICATION_MEDIA  = FIRST_SUB_WINDOW+1,
+        TYPE_APPLICATION_SUB_PANEL = FIRST_SUB_WINDOW+2,
+        TYPE_APPLICATION_ATTACHED_DIALOG = FIRST_SUB_WINDOW+3,
+        TYPE_APPLICATION_MEDIA_OVERLAY  = FIRST_SUB_WINDOW+4,
+        LAST_SUB_WINDOW         = 1999,
+        FIRST_SYSTEM_WINDOW     = 2000,
+        TYPE_STATUS_BAR         = FIRST_SYSTEM_WINDOW,
+        TYPE_SEARCH_BAR         = FIRST_SYSTEM_WINDOW+1,
+        TYPE_PHONE              = FIRST_SYSTEM_WINDOW+2,
+        TYPE_SYSTEM_ALERT       = FIRST_SYSTEM_WINDOW+3,
+        TYPE_KEYGUARD           = FIRST_SYSTEM_WINDOW+4,
+        TYPE_TOAST              = FIRST_SYSTEM_WINDOW+5,
+        TYPE_SYSTEM_OVERLAY     = FIRST_SYSTEM_WINDOW+6,
+        TYPE_PRIORITY_PHONE     = FIRST_SYSTEM_WINDOW+7,
+        TYPE_SYSTEM_DIALOG      = FIRST_SYSTEM_WINDOW+8,
+        TYPE_KEYGUARD_DIALOG    = FIRST_SYSTEM_WINDOW+9,
+        TYPE_SYSTEM_ERROR       = FIRST_SYSTEM_WINDOW+10,
+        TYPE_INPUT_METHOD       = FIRST_SYSTEM_WINDOW+11,
+        TYPE_INPUT_METHOD_DIALOG= FIRST_SYSTEM_WINDOW+12,
+        TYPE_WALLPAPER          = FIRST_SYSTEM_WINDOW+13,
+        TYPE_STATUS_BAR_PANEL   = FIRST_SYSTEM_WINDOW+14,
+        TYPE_SECURE_SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW+15,
+        TYPE_DRAG               = FIRST_SYSTEM_WINDOW+16,
+        TYPE_STATUS_BAR_SUB_PANEL  = FIRST_SYSTEM_WINDOW+17,
+        TYPE_POINTER            = FIRST_SYSTEM_WINDOW+18,
+        TYPE_NAVIGATION_BAR     = FIRST_SYSTEM_WINDOW+19,
+        TYPE_VOLUME_OVERLAY = FIRST_SYSTEM_WINDOW+20,
+        TYPE_BOOT_PROGRESS = FIRST_SYSTEM_WINDOW+21,
+        LAST_SYSTEM_WINDOW      = 2999,
+    };
+
+    enum {
+        INPUT_FEATURE_DISABLE_TOUCH_PAD_GESTURES = 0x00000001,
+        INPUT_FEATURE_NO_INPUT_CHANNEL = 0x00000002,
+        INPUT_FEATURE_DISABLE_USER_ACTIVITY = 0x00000004,
+    };
+
+    sp<InputChannel> inputChannel;
+    String8 name;
+    int32_t layoutParamsFlags;
+    int32_t layoutParamsPrivateFlags;
+    int32_t layoutParamsType;
+    nsecs_t dispatchingTimeout;
+    int32_t frameLeft;
+    int32_t frameTop;
+    int32_t frameRight;
+    int32_t frameBottom;
+    float scaleFactor;
+    Region touchableRegion;
+    bool visible;
+    bool canReceiveKeys;
+    bool hasFocus;
+    bool hasWallpaper;
+    bool paused;
+    int32_t layer;
+    int32_t ownerPid;
+    int32_t ownerUid;
+    int32_t inputFeatures;
+    int32_t displayId;
+
+    void addTouchableRegion(const Rect& region);
+
+    bool touchableRegionContainsPoint(int32_t x, int32_t y) const;
+    bool frameContainsPoint(int32_t x, int32_t y) const;
+
+    /* Returns true if the window is of a trusted type that is allowed to silently
+     * overlay other windows for the purpose of implementing the secure views feature.
+     * Trusted overlays, such as IME windows, can partly obscure other windows without causing
+     * motion events to be delivered to them with AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED.
+     */
+    bool isTrustedOverlay() const;
+
+    bool supportsSplitTouch() const;
+};
+
+
+/*
+ * Handle for a window that can receive input.
+ *
+ * Used by the native input dispatcher to indirectly refer to the window manager objects
+ * that describe a window.
+ */
+class InputWindowHandle : public RefBase {
+public:
+    const sp<InputApplicationHandle> inputApplicationHandle;
+
+    inline const InputWindowInfo* getInfo() const {
+        return mInfo;
+    }
+
+    inline sp<InputChannel> getInputChannel() const {
+        return mInfo ? mInfo->inputChannel : NULL;
+    }
+
+    inline String8 getName() const {
+        return mInfo ? mInfo->name : String8("<invalid>");
+    }
+
+    inline nsecs_t getDispatchingTimeout(nsecs_t defaultValue) const {
+        return mInfo ? mInfo->dispatchingTimeout : defaultValue;
+    }
+
+    /**
+     * Requests that the state of this object be updated to reflect
+     * the most current available information about the application.
+     *
+     * This method should only be called from within the input dispatcher's
+     * critical section.
+     *
+     * Returns true on success, or false if the handle is no longer valid.
+     */
+    virtual bool updateInfo() = 0;
+
+    /**
+     * Releases the storage used by the associated information when it is
+     * no longer needed.
+     */
+    void releaseInfo();
+
+protected:
+    InputWindowHandle(const sp<InputApplicationHandle>& inputApplicationHandle);
+    virtual ~InputWindowHandle();
+
+    InputWindowInfo* mInfo;
+};
+
+} // namespace android
+
+#endif // _UI_INPUT_WINDOW_H
diff --git a/libs/input/PointerController.h b/libs/input/PointerController.h
index b9e4ce7..790c0bb 100644
--- a/libs/input/PointerController.h
+++ b/libs/input/PointerController.h
@@ -21,7 +21,6 @@
 
 #include <ui/DisplayInfo.h>
 #include <input/Input.h>
-#include <inputflinger/PointerControllerInterface.h>
 #include <utils/BitSet.h>
 #include <utils/RefBase.h>
 #include <utils/Looper.h>
@@ -31,6 +30,84 @@
 
 namespace android {
 
+/**
+ * Interface for tracking a mouse / touch pad pointer and touch pad spots.
+ *
+ * The spots are sprites on screen that visually represent the positions of
+ * fingers
+ *
+ * The pointer controller is responsible for providing synchronization and for tracking
+ * display orientation changes if needed.
+ */
+class PointerControllerInterface : public virtual RefBase {
+protected:
+    PointerControllerInterface() { }
+    virtual ~PointerControllerInterface() { }
+
+public:
+    /* Gets the bounds of the region that the pointer can traverse.
+     * Returns true if the bounds are available. */
+    virtual bool getBounds(float* outMinX, float* outMinY,
+            float* outMaxX, float* outMaxY) const = 0;
+
+    /* Move the pointer. */
+    virtual void move(float deltaX, float deltaY) = 0;
+
+    /* Sets a mask that indicates which buttons are pressed. */
+    virtual void setButtonState(int32_t buttonState) = 0;
+
+    /* Gets a mask that indicates which buttons are pressed. */
+    virtual int32_t getButtonState() const = 0;
+
+    /* Sets the absolute location of the pointer. */
+    virtual void setPosition(float x, float y) = 0;
+
+    /* Gets the absolute location of the pointer. */
+    virtual void getPosition(float* outX, float* outY) const = 0;
+
+    enum Transition {
+        // Fade/unfade immediately.
+        TRANSITION_IMMEDIATE,
+        // Fade/unfade gradually.
+        TRANSITION_GRADUAL,
+    };
+
+    /* Fades the pointer out now. */
+    virtual void fade(Transition transition) = 0;
+
+    /* Makes the pointer visible if it has faded out.
+     * The pointer never unfades itself automatically.  This method must be called
+     * by the client whenever the pointer is moved or a button is pressed and it
+     * wants to ensure that the pointer becomes visible again. */
+    virtual void unfade(Transition transition) = 0;
+
+    enum Presentation {
+        // Show the mouse pointer.
+        PRESENTATION_POINTER,
+        // Show spots and a spot anchor in place of the mouse pointer.
+        PRESENTATION_SPOT,
+    };
+
+    /* Sets the mode of the pointer controller. */
+    virtual void setPresentation(Presentation presentation) = 0;
+
+    /* Sets the spots for the current gesture.
+     * The spots are not subject to the inactivity timeout like the pointer
+     * itself it since they are expected to remain visible for so long as
+     * the fingers are on the touch pad.
+     *
+     * The values of the AMOTION_EVENT_AXIS_PRESSURE axis is significant.
+     * For spotCoords, pressure != 0 indicates that the spot's location is being
+     * pressed (not hovering).
+     */
+    virtual void setSpots(const PointerCoords* spotCoords, const uint32_t* spotIdToIndex,
+            BitSet32 spotIdBits) = 0;
+
+    /* Removes all spots. */
+    virtual void clearSpots() = 0;
+};
+
+
 /*
  * Pointer resources.
  */