Add support for injecting events into ActivityContainers.

Enhanced the input system to support concurrent dispatch of touch
events on multiple displays which is required for this to work.

Add method to apply offset to PointerCoords.

Change-Id: I55fe4a9a8785ae5a2d3341d214fa3c5107f3963a

1 files changed, 115 insertions, 75 deletions

diff --git a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp
index c000460..f933681 100644
--- a/services/inputflinger/InputDispatcher.cpp
+++ b/services/inputflinger/InputDispatcher.cpp
@@ -1023,7 +1023,14 @@ void InputDispatcher::resumeAfterTargetsNotReadyTimeoutLocked(nsecs_t newTimeout
                 sp<InputWindowHandle> windowHandle = connection->inputWindowHandle;
 
                 if (windowHandle != NULL) {
-                    mTouchState.removeWindow(windowHandle);
+                    const InputWindowInfo* info = windowHandle->getInfo();
+                    if (info) {
+                        ssize_t stateIndex = mTouchStatesByDisplay.indexOfKey(info->displayId);
+                        if (stateIndex >= 0) {
+                            mTouchStatesByDisplay.editValueAt(stateIndex).removeWindow(
+                                    windowHandle);
+                        }
+                    }
                 }
 
                 if (connection->status == Connection::STATUS_NORMAL) {
@@ -1164,11 +1171,21 @@ int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
     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);
+    // Copy current touch state into mTempTouchState.
+    // This state is always reset at the end of this function, so if we don't find state
+    // for the specified display then our initial state will be empty.
+    const TouchState* oldState = NULL;
+    ssize_t oldStateIndex = mTouchStatesByDisplay.indexOfKey(displayId);
+    if (oldStateIndex >= 0) {
+        oldState = &mTouchStatesByDisplay.valueAt(oldStateIndex);
+        mTempTouchState.copyFrom(*oldState);
+    }
+
+    bool isSplit = mTempTouchState.split;
+    bool switchedDevice = mTempTouchState.deviceId >= 0 && mTempTouchState.displayId >= 0
+            && (mTempTouchState.deviceId != entry->deviceId
+                    || mTempTouchState.source != entry->source
+                    || mTempTouchState.displayId != displayId);
     bool isHoverAction = (maskedAction == AMOTION_EVENT_ACTION_HOVER_MOVE
             || maskedAction == AMOTION_EVENT_ACTION_HOVER_ENTER
             || maskedAction == AMOTION_EVENT_ACTION_HOVER_EXIT);
@@ -1178,11 +1195,10 @@ int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
     bool wrongDevice = false;
     if (newGesture) {
         bool down = maskedAction == AMOTION_EVENT_ACTION_DOWN;
-        if (switchedDevice && mTouchState.down && !down) {
+        if (switchedDevice && mTempTouchState.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;
@@ -1194,8 +1210,6 @@ int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
         mTempTouchState.source = entry->source;
         mTempTouchState.displayId = displayId;
         isSplit = false;
-    } else {
-        mTempTouchState.copyFrom(mTouchState);
     }
 
     if (newGesture || (isSplit && maskedAction == AMOTION_EVENT_ACTION_POINTER_DOWN)) {
@@ -1518,32 +1532,31 @@ Failed:
 
             if (isHoverAction) {
                 // Started hovering, therefore no longer down.
-                if (mTouchState.down) {
+                if (oldState && oldState->down) {
 #if DEBUG_FOCUS
                     ALOGD("Conflicting pointer actions: Hover received while pointer was down.");
 #endif
                     *outConflictingPointerActions = true;
                 }
-                mTouchState.reset();
+                mTempTouchState.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;
+                    mTempTouchState.deviceId = entry->deviceId;
+                    mTempTouchState.source = entry->source;
+                    mTempTouchState.displayId = displayId;
                 }
             } else if (maskedAction == AMOTION_EVENT_ACTION_UP
                     || maskedAction == AMOTION_EVENT_ACTION_CANCEL) {
                 // All pointers up or canceled.
-                mTouchState.reset();
+                mTempTouchState.reset();
             } else if (maskedAction == AMOTION_EVENT_ACTION_DOWN) {
                 // First pointer went down.
-                if (mTouchState.down) {
+                if (oldState && oldState->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) {
@@ -1562,12 +1575,20 @@ Failed:
                         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);
+            }
+
+            // Save changes unless the action was scroll in which case the temporary touch
+            // state was only valid for this one action.
+            if (maskedAction != AMOTION_EVENT_ACTION_SCROLL) {
+                if (mTempTouchState.displayId >= 0) {
+                    if (oldStateIndex >= 0) {
+                        mTouchStatesByDisplay.editValueAt(oldStateIndex).copyFrom(mTempTouchState);
+                    } else {
+                        mTouchStatesByDisplay.add(displayId, mTempTouchState);
+                    }
+                } else if (oldStateIndex >= 0) {
+                    mTouchStatesByDisplay.removeItemsAt(oldStateIndex);
+                }
             }
 
             // Update hover state.
@@ -2319,7 +2340,7 @@ InputDispatcher::splitMotionEvent(const MotionEntry* originalMotionEntry, BitSet
             originalMotionEntry->yPrecision,
             originalMotionEntry->downTime,
             originalMotionEntry->displayId,
-            splitPointerCount, splitPointerProperties, splitPointerCoords);
+            splitPointerCount, splitPointerProperties, splitPointerCoords, 0, 0);
 
     if (originalMotionEntry->injectionState) {
         splitMotionEntry->injectionState = originalMotionEntry->injectionState;
@@ -2491,7 +2512,7 @@ void InputDispatcher::notifyMotion(const NotifyMotionArgs* args) {
                 args->action, args->flags, args->metaState, args->buttonState,
                 args->edgeFlags, args->xPrecision, args->yPrecision, args->downTime,
                 args->displayId,
-                args->pointerCount, args->pointerProperties, args->pointerCoords);
+                args->pointerCount, args->pointerProperties, args->pointerCoords, 0, 0);
 
         needWake = enqueueInboundEventLocked(newEntry);
         mLock.unlock();
@@ -2539,7 +2560,7 @@ void InputDispatcher::notifyDeviceReset(const NotifyDeviceResetArgs* args) {
     }
 }
 
-int32_t InputDispatcher::injectInputEvent(const InputEvent* event,
+int32_t InputDispatcher::injectInputEvent(const InputEvent* event, int32_t displayId,
         int32_t injectorPid, int32_t injectorUid, int32_t syncMode, int32_t timeoutMillis,
         uint32_t policyFlags) {
 #if DEBUG_INBOUND_EVENT_DETAILS
@@ -2590,7 +2611,6 @@ int32_t InputDispatcher::injectInputEvent(const InputEvent* event,
 
     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();
@@ -2613,7 +2633,8 @@ int32_t InputDispatcher::injectInputEvent(const InputEvent* event,
                 motionEvent->getEdgeFlags(),
                 motionEvent->getXPrecision(), motionEvent->getYPrecision(),
                 motionEvent->getDownTime(), displayId,
-                uint32_t(pointerCount), pointerProperties, samplePointerCoords);
+                uint32_t(pointerCount), pointerProperties, samplePointerCoords,
+                motionEvent->getXOffset(), motionEvent->getYOffset());
         lastInjectedEntry = firstInjectedEntry;
         for (size_t i = motionEvent->getHistorySize(); i > 0; i--) {
             sampleEventTimes += 1;
@@ -2625,7 +2646,8 @@ int32_t InputDispatcher::injectInputEvent(const InputEvent* event,
                     motionEvent->getEdgeFlags(),
                     motionEvent->getXPrecision(), motionEvent->getYPrecision(),
                     motionEvent->getDownTime(), displayId,
-                    uint32_t(pointerCount), pointerProperties, samplePointerCoords);
+                    uint32_t(pointerCount), pointerProperties, samplePointerCoords,
+                    motionEvent->getXOffset(), motionEvent->getYOffset());
             lastInjectedEntry->next = nextInjectedEntry;
             lastInjectedEntry = nextInjectedEntry;
         }
@@ -2850,22 +2872,25 @@ void InputDispatcher::setInputWindows(const Vector<sp<InputWindowHandle> >& inpu
             mFocusedWindowHandle = newFocusedWindowHandle;
         }
 
-        for (size_t i = 0; i < mTouchState.windows.size(); i++) {
-            TouchedWindow& touchedWindow = mTouchState.windows.editItemAt(i);
-            if (!hasWindowHandleLocked(touchedWindow.windowHandle)) {
+        for (size_t d = 0; d < mTouchStatesByDisplay.size(); d++) {
+            TouchState& state = mTouchStatesByDisplay.editValueAt(d);
+            for (size_t i = 0; i < state.windows.size(); i++) {
+                TouchedWindow& touchedWindow = state.windows.editItemAt(i);
+                if (!hasWindowHandleLocked(touchedWindow.windowHandle)) {
 #if DEBUG_FOCUS
-                ALOGD("Touched window was removed: %s",
-                        touchedWindow.windowHandle->getName().string());
+                    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);
+                    sp<InputChannel> touchedInputChannel =
+                            touchedWindow.windowHandle->getInputChannel();
+                    if (touchedInputChannel != NULL) {
+                        CancelationOptions options(CancelationOptions::CANCEL_POINTER_EVENTS,
+                                "touched window was removed");
+                        synthesizeCancelationEventsForInputChannelLocked(
+                                touchedInputChannel, options);
+                    }
+                    state.windows.removeAt(i--);
                 }
-                mTouchState.windows.removeAt(i--);
             }
         }
 
@@ -3006,23 +3031,27 @@ bool InputDispatcher::transferTouchFocus(const sp<InputChannel>& fromChannel,
         }
 
         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;
+        for (size_t d = 0; d < mTouchStatesByDisplay.size(); d++) {
+            TouchState& state = mTouchStatesByDisplay.editValueAt(d);
+            for (size_t i = 0; i < state.windows.size(); i++) {
+                const TouchedWindow& touchedWindow = state.windows[i];
+                if (touchedWindow.windowHandle == fromWindowHandle) {
+                    int32_t oldTargetFlags = touchedWindow.targetFlags;
+                    BitSet32 pointerIds = touchedWindow.pointerIds;
+
+                    state.windows.removeAt(i);
+
+                    int32_t newTargetFlags = oldTargetFlags
+                            & (InputTarget::FLAG_FOREGROUND
+                                    | InputTarget::FLAG_SPLIT | InputTarget::FLAG_DISPATCH_AS_IS);
+                    state.addOrUpdateWindow(toWindowHandle, newTargetFlags, pointerIds);
+
+                    found = true;
+                    goto Found;
+                }
             }
         }
+Found:
 
         if (! found) {
 #if DEBUG_FOCUS
@@ -3066,7 +3095,7 @@ void InputDispatcher::resetAndDropEverythingLocked(const char* reason) {
     drainInboundQueueLocked();
     resetANRTimeoutsLocked();
 
-    mTouchState.reset();
+    mTouchStatesByDisplay.clear();
     mLastHoverWindowHandle.clear();
 }
 
@@ -3101,22 +3130,28 @@ void InputDispatcher::dumpDispatchStateLocked(String8& dump) {
     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);
+    if (!mTouchStatesByDisplay.isEmpty()) {
+        dump.appendFormat(INDENT "TouchStatesByDisplay:\n");
+        for (size_t i = 0; i < mTouchStatesByDisplay.size(); i++) {
+            const TouchState& state = mTouchStatesByDisplay.valueAt(i);
+            dump.appendFormat(INDENT2 "%d: down=%s, split=%s, deviceId=%d, source=0x%08x\n",
+                    state.displayId, toString(state.down), toString(state.split),
+                    state.deviceId, state.source);
+            if (!state.windows.isEmpty()) {
+                dump.append(INDENT3 "Windows:\n");
+                for (size_t i = 0; i < state.windows.size(); i++) {
+                    const TouchedWindow& touchedWindow = state.windows[i];
+                    dump.appendFormat(INDENT4 "%d: name='%s', pointerIds=0x%0x, targetFlags=0x%x\n",
+                            i, touchedWindow.windowHandle->getName().string(),
+                            touchedWindow.pointerIds.value,
+                            touchedWindow.targetFlags);
+                }
+            } else {
+                dump.append(INDENT3 "Windows: <none>\n");
+            }
         }
     } else {
-        dump.append(INDENT "TouchedWindows: <none>\n");
+        dump.append(INDENT "TouchStates: <no displays touched>\n");
     }
 
     if (!mWindowHandles.isEmpty()) {
@@ -3901,7 +3936,8 @@ InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime,
         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) :
+        const PointerProperties* pointerProperties, const PointerCoords* pointerCoords,
+        float xOffset, float yOffset) :
         EventEntry(TYPE_MOTION, eventTime, policyFlags),
         eventTime(eventTime),
         deviceId(deviceId), source(source), action(action), flags(flags),
@@ -3911,6 +3947,9 @@ InputDispatcher::MotionEntry::MotionEntry(nsecs_t eventTime,
     for (uint32_t i = 0; i < pointerCount; i++) {
         this->pointerProperties[i].copyFrom(pointerProperties[i]);
         this->pointerCoords[i].copyFrom(pointerCoords[i]);
+        if (xOffset || yOffset) {
+            this->pointerCoords[i].applyOffset(xOffset, yOffset);
+        }
     }
 }
 
@@ -4204,7 +4243,8 @@ void InputDispatcher::InputState::synthesizeCancelationEvents(nsecs_t currentTim
                     memento.flags, 0, 0, 0,
                     memento.xPrecision, memento.yPrecision, memento.downTime,
                     memento.displayId,
-                    memento.pointerCount, memento.pointerProperties, memento.pointerCoords));
+                    memento.pointerCount, memento.pointerProperties, memento.pointerCoords,
+                    0, 0));
         }
     }
 }