1 files changed, 303 insertions, 0 deletions
diff --git a/libs/androidfw/Keyboard.cpp b/libs/androidfw/Keyboard.cpp
new file mode 100644
index 0000000..e97a5eb
--- /dev/null
+++ b/libs/androidfw/Keyboard.cpp
@@ -0,0 +1,303 @@
+/*
+ * 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 "Keyboard"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include <androidfw/Keyboard.h>
+#include <androidfw/KeycodeLabels.h>
+#include <androidfw/KeyLayoutMap.h>
+#include <androidfw/KeyCharacterMap.h>
+#include <utils/Errors.h>
+#include <utils/Log.h>
+#include <cutils/properties.h>
+
+namespace android {
+
+// --- KeyMap ---
+
+KeyMap::KeyMap() :
+        keyLayoutMap(NULL), keyCharacterMap(NULL) {
+}
+
+KeyMap::~KeyMap() {
+    delete keyLayoutMap;
+    delete keyCharacterMap;
+}
+
+status_t KeyMap::load(const InputDeviceIdentifier& deviceIdenfifier,
+        const PropertyMap* deviceConfiguration) {
+    // Use the configured key layout if available.
+    if (deviceConfiguration) {
+        String8 keyLayoutName;
+        if (deviceConfiguration->tryGetProperty(String8("keyboard.layout"),
+                keyLayoutName)) {
+            status_t status = loadKeyLayout(deviceIdenfifier, keyLayoutName);
+            if (status == NAME_NOT_FOUND) {
+                ALOGE("Configuration for keyboard device '%s' requested keyboard layout '%s' but "
+                        "it was not found.",
+                        deviceIdenfifier.name.string(), keyLayoutName.string());
+            }
+        }
+
+        String8 keyCharacterMapName;
+        if (deviceConfiguration->tryGetProperty(String8("keyboard.characterMap"),
+                keyCharacterMapName)) {
+            status_t status = loadKeyCharacterMap(deviceIdenfifier, keyCharacterMapName);
+            if (status == NAME_NOT_FOUND) {
+                ALOGE("Configuration for keyboard device '%s' requested keyboard character "
+                        "map '%s' but it was not found.",
+                        deviceIdenfifier.name.string(), keyLayoutName.string());
+            }
+        }
+
+        if (isComplete()) {
+            return OK;
+        }
+    }
+
+    // Try searching by device identifier.
+    if (probeKeyMap(deviceIdenfifier, String8::empty())) {
+        return OK;
+    }
+
+    // Fall back on the Generic key map.
+    // TODO Apply some additional heuristics here to figure out what kind of
+    //      generic key map to use (US English, etc.) for typical external keyboards.
+    if (probeKeyMap(deviceIdenfifier, String8("Generic"))) {
+        return OK;
+    }
+
+    // Try the Virtual key map as a last resort.
+    if (probeKeyMap(deviceIdenfifier, String8("Virtual"))) {
+        return OK;
+    }
+
+    // Give up!
+    ALOGE("Could not determine key map for device '%s' and no default key maps were found!",
+            deviceIdenfifier.name.string());
+    return NAME_NOT_FOUND;
+}
+
+bool KeyMap::probeKeyMap(const InputDeviceIdentifier& deviceIdentifier,
+        const String8& keyMapName) {
+    if (!haveKeyLayout()) {
+        loadKeyLayout(deviceIdentifier, keyMapName);
+    }
+    if (!haveKeyCharacterMap()) {
+        loadKeyCharacterMap(deviceIdentifier, keyMapName);
+    }
+    return isComplete();
+}
+
+status_t KeyMap::loadKeyLayout(const InputDeviceIdentifier& deviceIdentifier,
+        const String8& name) {
+    String8 path(getPath(deviceIdentifier, name,
+            INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_LAYOUT));
+    if (path.isEmpty()) {
+        return NAME_NOT_FOUND;
+    }
+
+    KeyLayoutMap* map;
+    status_t status = KeyLayoutMap::load(path, &map);
+    if (status) {
+        return status;
+    }
+
+    keyLayoutFile.setTo(path);
+    keyLayoutMap = map;
+    return OK;
+}
+
+status_t KeyMap::loadKeyCharacterMap(const InputDeviceIdentifier& deviceIdentifier,
+        const String8& name) {
+    String8 path(getPath(deviceIdentifier, name,
+            INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_CHARACTER_MAP));
+    if (path.isEmpty()) {
+        return NAME_NOT_FOUND;
+    }
+
+    KeyCharacterMap* map;
+    status_t status = KeyCharacterMap::load(path, &map);
+    if (status) {
+        return status;
+    }
+
+    keyCharacterMapFile.setTo(path);
+    keyCharacterMap = map;
+    return OK;
+}
+
+String8 KeyMap::getPath(const InputDeviceIdentifier& deviceIdentifier,
+        const String8& name, InputDeviceConfigurationFileType type) {
+    return name.isEmpty()
+            ? getInputDeviceConfigurationFilePathByDeviceIdentifier(deviceIdentifier, type)
+            : getInputDeviceConfigurationFilePathByName(name, type);
+}
+
+
+// --- Global functions ---
+
+bool isEligibleBuiltInKeyboard(const InputDeviceIdentifier& deviceIdentifier,
+        const PropertyMap* deviceConfiguration, const KeyMap* keyMap) {
+    if (!keyMap->haveKeyCharacterMap()
+            || keyMap->keyCharacterMap->getKeyboardType()
+                    == KeyCharacterMap::KEYBOARD_TYPE_SPECIAL_FUNCTION) {
+        return false;
+    }
+
+    if (deviceConfiguration) {
+        bool builtIn = false;
+        if (deviceConfiguration->tryGetProperty(String8("keyboard.builtIn"), builtIn)
+                && builtIn) {
+            return true;
+        }
+    }
+
+    return strstr(deviceIdentifier.name.string(), "-keypad");
+}
+
+static int lookupValueByLabel(const char* literal, const KeycodeLabel *list) {
+    while (list->literal) {
+        if (strcmp(literal, list->literal) == 0) {
+            return list->value;
+        }
+        list++;
+    }
+    return list->value;
+}
+
+static const char* lookupLabelByValue(int value, const KeycodeLabel *list) {
+    while (list->literal) {
+        if (list->value == value) {
+            return list->literal;
+        }
+        list++;
+    }
+    return NULL;
+}
+
+int32_t getKeyCodeByLabel(const char* label) {
+    return int32_t(lookupValueByLabel(label, KEYCODES));
+}
+
+uint32_t getKeyFlagByLabel(const char* label) {
+    return uint32_t(lookupValueByLabel(label, FLAGS));
+}
+
+int32_t getAxisByLabel(const char* label) {
+    return int32_t(lookupValueByLabel(label, AXES));
+}
+
+const char* getAxisLabel(int32_t axisId) {
+    return lookupLabelByValue(axisId, AXES);
+}
+
+static int32_t setEphemeralMetaState(int32_t mask, bool down, int32_t oldMetaState) {
+    int32_t newMetaState;
+    if (down) {
+        newMetaState = oldMetaState | mask;
+    } else {
+        newMetaState = oldMetaState &
+                ~(mask | AMETA_ALT_ON | AMETA_SHIFT_ON | AMETA_CTRL_ON | AMETA_META_ON);
+    }
+
+    if (newMetaState & (AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON)) {
+        newMetaState |= AMETA_ALT_ON;
+    }
+
+    if (newMetaState & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) {
+        newMetaState |= AMETA_SHIFT_ON;
+    }
+
+    if (newMetaState & (AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON)) {
+        newMetaState |= AMETA_CTRL_ON;
+    }
+
+    if (newMetaState & (AMETA_META_LEFT_ON | AMETA_META_RIGHT_ON)) {
+        newMetaState |= AMETA_META_ON;
+    }
+    return newMetaState;
+}
+
+static int32_t toggleLockedMetaState(int32_t mask, bool down, int32_t oldMetaState) {
+    if (down) {
+        return oldMetaState;
+    } else {
+        return oldMetaState ^ mask;
+    }
+}
+
+int32_t updateMetaState(int32_t keyCode, bool down, int32_t oldMetaState) {
+    int32_t mask;
+    switch (keyCode) {
+    case AKEYCODE_ALT_LEFT:
+        return setEphemeralMetaState(AMETA_ALT_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_ALT_RIGHT:
+        return setEphemeralMetaState(AMETA_ALT_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_SHIFT_LEFT:
+        return setEphemeralMetaState(AMETA_SHIFT_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_SHIFT_RIGHT:
+        return setEphemeralMetaState(AMETA_SHIFT_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_SYM:
+        return setEphemeralMetaState(AMETA_SYM_ON, down, oldMetaState);
+    case AKEYCODE_FUNCTION:
+        return setEphemeralMetaState(AMETA_FUNCTION_ON, down, oldMetaState);
+    case AKEYCODE_CTRL_LEFT:
+        return setEphemeralMetaState(AMETA_CTRL_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_CTRL_RIGHT:
+        return setEphemeralMetaState(AMETA_CTRL_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_META_LEFT:
+        return setEphemeralMetaState(AMETA_META_LEFT_ON, down, oldMetaState);
+    case AKEYCODE_META_RIGHT:
+        return setEphemeralMetaState(AMETA_META_RIGHT_ON, down, oldMetaState);
+    case AKEYCODE_CAPS_LOCK:
+        return toggleLockedMetaState(AMETA_CAPS_LOCK_ON, down, oldMetaState);
+    case AKEYCODE_NUM_LOCK:
+        return toggleLockedMetaState(AMETA_NUM_LOCK_ON, down, oldMetaState);
+    case AKEYCODE_SCROLL_LOCK:
+        return toggleLockedMetaState(AMETA_SCROLL_LOCK_ON, down, oldMetaState);
+    default:
+        return oldMetaState;
+    }
+}
+
+bool isMetaKey(int32_t keyCode) {
+    switch (keyCode) {
+    case AKEYCODE_ALT_LEFT:
+    case AKEYCODE_ALT_RIGHT:
+    case AKEYCODE_SHIFT_LEFT:
+    case AKEYCODE_SHIFT_RIGHT:
+    case AKEYCODE_SYM:
+    case AKEYCODE_FUNCTION:
+    case AKEYCODE_CTRL_LEFT:
+    case AKEYCODE_CTRL_RIGHT:
+    case AKEYCODE_META_LEFT:
+    case AKEYCODE_META_RIGHT:
+    case AKEYCODE_CAPS_LOCK:
+    case AKEYCODE_NUM_LOCK:
+    case AKEYCODE_SCROLL_LOCK:
+        return true;
+    default:
+        return false;
+    }
+}
+
+
+} // namespace android