am d367b70c: Merge "Accessibility HOVER_ENTER / EXIT without enclosing... (c37dc69c) · Commits · e / os / android_frameworks_base

services/java/com/android/server/accessibility/TouchExplorer.java

+103 −78

Original line number	Diff line number	Diff line
		@@ -102,10 +102,6 @@ class TouchExplorer implements EventStreamTransformation {
		// The timeout after which we are no longer trying to detect a gesture.
		private static final int EXIT_GESTURE_DETECTION_TIMEOUT = 2000;

		// The timeout to send interaction end events in case we did not
		// receive the expected hover exit event due to a misbehaving app.
		private static final int SEND_INTERACTION_END_EVENTS_TIMEOUT = 200;

		// Temporary array for storing pointer IDs.
		private final int[] mTempPointerIds = new int[MAX_POINTER_COUNT];

		@@ -139,8 +135,11 @@ class TouchExplorer implements EventStreamTransformation {
		// Command for delayed sending of a hover exit event.
		private final SendHoverDelayed mSendHoverExitDelayed;

		// Command for delayed sending of interaction ending events.
		private final SendInteractionEndEventsDelayed mSendInteractionEndEventsDelayed;
		// Command for delayed sending of touch exploration end events.
		private final SendAccessibilityEventDelayed mSendTouchExplorationEndDelayed;

		// Command for delayed sending of touch interaction end events.
		private final SendAccessibilityEventDelayed mSendTouchInteractionEndDelayed;

		// Command for delayed sending of a long press.
		private final PerformLongPressDelayed mPerformLongPressDelayed;
		@@ -209,11 +208,8 @@ class TouchExplorer implements EventStreamTransformation {
		// The id of the last touch explored window.
		private int mLastTouchedWindowId;

		// Whether touch exploration gesture has ended.
		private boolean mTouchExplorationGestureEnded;

		// Whether touch interaction has ended.
		private boolean mTouchInteractionEnded;
		// Whether touch exploration is in progress.
		private boolean mTouchExplorationInProgress;

		/**
		* Creates a new instance.
		@@ -240,7 +236,12 @@ class TouchExplorer implements EventStreamTransformation {
		mGestureLibrary.load();
		mSendHoverEnterDelayed = new SendHoverDelayed(MotionEvent.ACTION_HOVER_ENTER, true);
		mSendHoverExitDelayed = new SendHoverDelayed(MotionEvent.ACTION_HOVER_EXIT, false);
		mSendInteractionEndEventsDelayed = new SendInteractionEndEventsDelayed();
		mSendTouchExplorationEndDelayed = new SendAccessibilityEventDelayed(
		AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END,
		mDetermineUserIntentTimeout);
		mSendTouchInteractionEndDelayed = new SendAccessibilityEventDelayed(
		AccessibilityEvent.TYPE_TOUCH_INTERACTION_END,
		mDetermineUserIntentTimeout);
		mDoubleTapDetector = new DoubleTapDetector();
		final float density = context.getResources().getDisplayMetrics().density;
		mScaledMinPointerDistanceToUseMiddleLocation =
		@@ -265,7 +266,7 @@ class TouchExplorer implements EventStreamTransformation {
		switch (mCurrentState) {
		case STATE_TOUCH_EXPLORING: {
		// If a touch exploration gesture is in progress send events for its end.
		sendExitEventsIfNeeded(policyFlags);
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(policyFlags);
		} break;
		case STATE_DRAGGING: {
		mDraggingPointerId = INVALID_POINTER_ID;
		@@ -286,7 +287,8 @@ class TouchExplorer implements EventStreamTransformation {
		mSendHoverExitDelayed.remove();
		mPerformLongPressDelayed.remove();
		mExitGestureDetectionModeDelayed.remove();
		mSendInteractionEndEventsDelayed.remove();
		mSendTouchExplorationEndDelayed.remove();
		mSendTouchInteractionEndDelayed.remove();
		// Reset the pointer trackers.
		mReceivedPointerTracker.clear();
		mInjectedPointerTracker.clear();
		@@ -301,6 +303,7 @@ class TouchExplorer implements EventStreamTransformation {
		if (mNext != null) {
		mNext.clear();
		}
		mTouchExplorationInProgress = false;
		}

		@Override
		@@ -341,19 +344,17 @@ class TouchExplorer implements EventStreamTransformation {

		// The event for gesture end should be strictly after the
		// last hover exit event.
		if (mTouchExplorationGestureEnded
		if (mSendTouchExplorationEndDelayed.isPending()
		&& eventType == AccessibilityEvent.TYPE_VIEW_HOVER_EXIT) {
		mSendInteractionEndEventsDelayed.remove();
		mTouchExplorationGestureEnded = false;
		mSendTouchExplorationEndDelayed.remove();
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END);
		}

		// The event for touch interaction end should be strictly after the
		// last hover exit and the touch exploration gesture end events.
		if (mTouchInteractionEnded
		if (mSendTouchInteractionEndDelayed.isPending()
		&& eventType == AccessibilityEvent.TYPE_VIEW_HOVER_EXIT) {
		mSendInteractionEndEventsDelayed.remove();
		mTouchInteractionEnded = false;
		mSendTouchInteractionEndDelayed.remove();
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_INTERACTION_END);
		}

		@@ -396,15 +397,6 @@ class TouchExplorer implements EventStreamTransformation {

		switch (event.getActionMasked()) {
		case MotionEvent.ACTION_DOWN:
		// The delayed enter not delivered implies that we have delivered
		// TYPE_TOUCH_INTERACTION_START and not TYPE_TOUCH_INTERACTION_END,
		// therefore we need to deliver the interaction end event here.
		if (mSendHoverEnterDelayed.isPending()) {
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_INTERACTION_END);
		}
		// Announce the start of a new touch interaction.
		sendAccessibilityEvent(
		AccessibilityEvent.TYPE_TOUCH_INTERACTION_START);
		// Pre-feed the motion events to the gesture detector since we
		// have a distance slop before getting into gesture detection
		// mode and not using the points within this slop significantly
		@@ -426,8 +418,20 @@ class TouchExplorer implements EventStreamTransformation {
		mSendHoverExitDelayed.remove();
		}

		if (mSendInteractionEndEventsDelayed.isPending()) {
		mSendInteractionEndEventsDelayed.forceSendAndRemove();
		if (mSendTouchExplorationEndDelayed.isPending()) {
		mSendTouchExplorationEndDelayed.forceSendAndRemove();
		}

		if (mSendTouchInteractionEndDelayed.isPending()) {
		mSendTouchInteractionEndDelayed.forceSendAndRemove();
		}

		// Every pointer that goes down is active until it moves or
		// another one goes down. Hence, having more than one pointer
		// down we have already send the interaction start event.
		if (event.getPointerCount() == 1) {
		sendAccessibilityEvent(
		AccessibilityEvent.TYPE_TOUCH_INTERACTION_START);
		}

		mPerformLongPressDelayed.remove();
		@@ -443,11 +447,13 @@ class TouchExplorer implements EventStreamTransformation {
		mPerformLongPressDelayed.post(event, policyFlags);
		break;
		}
		if (!mTouchExplorationInProgress) {
		// Deliver hover enter with a delay to have a chance
		// to detect what the user is trying to do.
		final int pointerId = receivedTracker.getPrimaryActivePointerId();
		final int pointerIdBits = (1 << pointerId);
		mSendHoverEnterDelayed.post(event, true, pointerIdBits, policyFlags);
		}
		} break;
		default: {
		/* do nothing - let the code for ACTION_MOVE decide what to do */
		@@ -512,12 +518,27 @@ class TouchExplorer implements EventStreamTransformation {
		break;
		}
		} else {
		// Cancel the long press if pending and the user
		// moved more than the slop.
		if (mPerformLongPressDelayed.isPending()) {
		final float deltaX =
		receivedTracker.getReceivedPointerDownX(pointerId)
		- rawEvent.getX(pointerIndex);
		final float deltaY =
		receivedTracker.getReceivedPointerDownY(pointerId)
		- rawEvent.getY(pointerIndex);
		final double moveDelta = Math.hypot(deltaX, deltaY);
		// The user has moved enough for us to decide.
		if (moveDelta > mTouchSlop) {
		mPerformLongPressDelayed.remove();
		}
		}
		// The user is wither double tapping or performing long
		// press so do not send move events yet.
		if (mDoubleTapDetector.firstTapDetected()) {
		break;
		}
		sendEnterEventsIfNeeded(policyFlags);
		sendTouchExplorationGestureStartAndHoverEnterIfNeeded(policyFlags);
		sendMotionEvent(event, MotionEvent.ACTION_HOVER_MOVE, pointerIdBits,
		policyFlags);
		}
		@@ -548,7 +569,7 @@ class TouchExplorer implements EventStreamTransformation {
		}
		// We are sending events so send exit and gesture
		// end since we transition to another state.
		sendExitEventsIfNeeded(policyFlags);
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(policyFlags);
		}

		// We know that a new state transition is to happen and the
		@@ -583,7 +604,7 @@ class TouchExplorer implements EventStreamTransformation {
		mPerformLongPressDelayed.remove();
		// We are sending events so send exit and gesture
		// end since we transition to another state.
		sendExitEventsIfNeeded(policyFlags);
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(policyFlags);
		}

		// More than two pointers are delegated to the view hierarchy.
		@@ -612,11 +633,14 @@ class TouchExplorer implements EventStreamTransformation {

		// If we have not delivered the enter schedule exit.
		if (mSendHoverEnterDelayed.isPending()) {
		mSendHoverEnterDelayed.mTouchExplorationInProgress = false;
		mSendHoverExitDelayed.post(event, false, pointerIdBits, policyFlags);
		} else {
		// The user is touch exploring so we send events for end.
		sendExitEventsIfNeeded(policyFlags);
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(policyFlags);
		}

		if (!mSendTouchInteractionEndDelayed.isPending()) {
		mSendTouchInteractionEndDelayed.post();
		}
		} break;
		}
		@@ -846,6 +870,14 @@ class TouchExplorer implements EventStreamTransformation {
		if (accessibilityManager.isEnabled()) {
		AccessibilityEvent event = AccessibilityEvent.obtain(type);
		accessibilityManager.sendAccessibilityEvent(event);
		switch (type) {
		case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START: {
		mTouchExplorationInProgress = true;
		} break;
		case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END: {
		mTouchExplorationInProgress = false;
		} break;
		}
		}
		}

		@@ -893,14 +925,12 @@ class TouchExplorer implements EventStreamTransformation {
		*
		* @param policyFlags The policy flags associated with the event.
		*/
		private void sendExitEventsIfNeeded(int policyFlags) {
		private void sendHoverExitAndTouchExplorationGestureEndIfNeeded(int policyFlags) {
		MotionEvent event = mInjectedPointerTracker.getLastInjectedHoverEvent();
		if (event != null && event.getActionMasked() != MotionEvent.ACTION_HOVER_EXIT) {
		final int pointerIdBits = event.getPointerIdBits();
		mTouchExplorationGestureEnded = true;
		mTouchInteractionEnded = true;
		if (!mSendInteractionEndEventsDelayed.isPending()) {
		mSendInteractionEndEventsDelayed.post();
		if (!mSendTouchExplorationEndDelayed.isPending()) {
		mSendTouchExplorationEndDelayed.post();
		}
		sendMotionEvent(event, MotionEvent.ACTION_HOVER_EXIT, pointerIdBits, policyFlags);
		}
		@@ -912,10 +942,11 @@ class TouchExplorer implements EventStreamTransformation {
		*
		* @param policyFlags The policy flags associated with the event.
		*/
		private void sendEnterEventsIfNeeded(int policyFlags) {
		private void sendTouchExplorationGestureStartAndHoverEnterIfNeeded(int policyFlags) {
		MotionEvent event = mInjectedPointerTracker.getLastInjectedHoverEvent();
		if (event != null && event.getActionMasked() == MotionEvent.ACTION_HOVER_EXIT) {
		final int pointerIdBits = event.getPointerIdBits();
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START);
		sendMotionEvent(event, MotionEvent.ACTION_HOVER_ENTER, pointerIdBits, policyFlags);
		}
		}
		@@ -1181,8 +1212,12 @@ class TouchExplorer implements EventStreamTransformation {
		mSendHoverExitDelayed.remove();
		mPerformLongPressDelayed.remove();

		// The touch interaction has ended since we will send a click.
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_INTERACTION_END);
		if (mSendTouchExplorationEndDelayed.isPending()) {
		mSendTouchExplorationEndDelayed.forceSendAndRemove();
		}
		if (mSendTouchInteractionEndDelayed.isPending()) {
		mSendTouchInteractionEndDelayed.forceSendAndRemove();
		}

		int clickLocationX;
		int clickLocationY;
		@@ -1416,7 +1451,7 @@ class TouchExplorer implements EventStreamTransformation {
		mLongPressingPointerDeltaX = (int) mEvent.getX(pointerIndex) - clickLocationX;
		mLongPressingPointerDeltaY = (int) mEvent.getY(pointerIndex) - clickLocationY;

		sendExitEventsIfNeeded(mPolicyFlags);
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(mPolicyFlags);

		mCurrentState = STATE_DELEGATING;
		sendDownForAllActiveNotInjectedPointers(mEvent, mPolicyFlags);
		@@ -1445,7 +1480,6 @@ class TouchExplorer implements EventStreamTransformation {
		private MotionEvent mPrototype;
		private int mPointerIdBits;
		private int mPolicyFlags;
		private boolean mTouchExplorationInProgress;

		public SendHoverDelayed(int hoverAction, boolean gestureStarted) {
		mHoverAction = hoverAction;
		@@ -1456,7 +1490,6 @@ class TouchExplorer implements EventStreamTransformation {
		int pointerIdBits, int policyFlags) {
		remove();
		mPrototype = MotionEvent.obtain(prototype);
		mTouchExplorationInProgress = touchExplorationInProgress;
		mPointerIdBits = pointerIdBits;
		mPolicyFlags = policyFlags;
		mHandler.postDelayed(this, mDetermineUserIntentTimeout);
		@@ -1493,7 +1526,6 @@ class TouchExplorer implements EventStreamTransformation {
		mPrototype = null;
		mPointerIdBits = -1;
		mPolicyFlags = 0;
		mTouchExplorationInProgress = false;
		}

		public void forceSendAndRemove() {
		@@ -1510,22 +1542,15 @@ class TouchExplorer implements EventStreamTransformation {
		Slog.d(LOG_TAG_SEND_HOVER_DELAYED, mGestureStarted ?
		"touchExplorationGestureStarted" : "touchExplorationGestureEnded");
		}
		if (mTouchExplorationInProgress) {
		if (mGestureStarted) {
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START);
		} else {
		mTouchExplorationGestureEnded = true;
		mTouchInteractionEnded = true;
		if (!mSendInteractionEndEventsDelayed.isPending()) {
		mSendInteractionEndEventsDelayed.post();
		}
		}
		} else {
		if (!mGestureStarted) {
		mTouchInteractionEnded = true;
		if (!mSendInteractionEndEventsDelayed.isPending()) {
		mSendInteractionEndEventsDelayed.post();
		if (!mSendTouchExplorationEndDelayed.isPending()) {
		mSendTouchExplorationEndDelayed.post();
		}
		if (mSendTouchInteractionEndDelayed.isPending()) {
		mSendTouchInteractionEndDelayed.remove();
		mSendTouchInteractionEndDelayed.post();
		}
		}
		sendMotionEvent(mPrototype, mHoverAction, mPointerIdBits, mPolicyFlags);
		@@ -1533,14 +1558,21 @@ class TouchExplorer implements EventStreamTransformation {
		}
		}

		private class SendInteractionEndEventsDelayed implements Runnable {
		private class SendAccessibilityEventDelayed implements Runnable {
		private final int mEventType;
		private final int mDelay;

		public SendAccessibilityEventDelayed(int eventType, int delay) {
		mEventType = eventType;
		mDelay = delay;
		}

		public void remove() {
		mHandler.removeCallbacks(this);
		}

		public void post() {
		mHandler.postDelayed(this, SEND_INTERACTION_END_EVENTS_TIMEOUT);
		mHandler.postDelayed(this, mDelay);
		}

		public boolean isPending() {
		@@ -1556,14 +1588,7 @@ class TouchExplorer implements EventStreamTransformation {

		@Override
		public void run() {
		if (mTouchExplorationGestureEnded) {
		mTouchExplorationGestureEnded = false;
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END);
		}
		if (mTouchInteractionEnded) {
		mTouchInteractionEnded = false;
		sendAccessibilityEvent(AccessibilityEvent.TYPE_TOUCH_INTERACTION_END);
		}
		sendAccessibilityEvent(mEventType);
		}
		}