Break up TouchExplorer.handleMotionEventStateTouchExploring for better readability. (0a142b5c) · Commits · e / os / android_frameworks_base

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

+162 −138

Original line number	Diff line number	Diff line
		@@ -409,10 +409,29 @@ class TouchExplorer extends BaseEventStreamTransformation
		* @param rawEvent The raw (unmodified) motion event.
		* @param policyFlags The policy flags associated with the event.
		*/
		private void handleMotionEventStateTouchExploring(MotionEvent event, MotionEvent rawEvent,
		int policyFlags) {
		private void handleMotionEventStateTouchExploring(
		MotionEvent event, MotionEvent rawEvent, int policyFlags) {
		switch (event.getActionMasked()) {
		case MotionEvent.ACTION_DOWN: {
		case MotionEvent.ACTION_DOWN:
		handleActionDownStateTouchExploring(event, policyFlags);
		break;
		case MotionEvent.ACTION_POINTER_DOWN:
		handleActionPointerDownStateTouchExploring();
		break;
		case MotionEvent.ACTION_MOVE:
		handleActionMoveStateTouchExploring(event, rawEvent, policyFlags);
		break;
		case MotionEvent.ACTION_UP:
		handleActionUpStateTouchExploring(event, policyFlags);
		break;
		}
		}

		/**
		* Handles ACTION_DOWN while in the default touch exploring state. This event represents the
		* first finger touching the screen.
		*/
		private void handleActionDownStateTouchExploring(MotionEvent event, int policyFlags) {
		mAms.onTouchInteractionStart();

		// If we still have not notified the user for the last
		@@ -426,7 +445,8 @@ class TouchExplorer extends BaseEventStreamTransformation
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(policyFlags);
		}

		// Avoid duplicated TYPE_TOUCH_INTERACTION_START event when 2nd tap of double tap.
		// Avoid duplicated TYPE_TOUCH_INTERACTION_START event when 2nd tap of double
		// tap.
		if (!mGestureDetector.firstTapDetected()) {
		mSendTouchExplorationEndDelayed.forceSendAndRemove();
		mSendTouchInteractionEndDelayed.forceSendAndRemove();
		@@ -436,48 +456,54 @@ class TouchExplorer extends BaseEventStreamTransformation
		mSendTouchInteractionEndDelayed.cancel();
		}

		if (!mGestureDetector.firstTapDetected()
		&& !mState.isTouchExplorationInProgress()) {
		if (!mGestureDetector.firstTapDetected() && !mState.isTouchExplorationInProgress()) {
		if (!mSendHoverEnterAndMoveDelayed.isPending()) {
		// Deliver hover enter with a delay to have a chance
		// to detect what the user is trying to do.
		final int pointerId = mReceivedPointerTracker.getPrimaryPointerId();
		final int pointerIdBits = (1 << pointerId);
		mSendHoverEnterAndMoveDelayed.post(event, true, pointerIdBits,
		policyFlags);
		mSendHoverEnterAndMoveDelayed.post(event, true, pointerIdBits, policyFlags);
		} else {
		// Cache the event until we discern exploration from gesturing.
		mSendHoverEnterAndMoveDelayed.addEvent(event);
		}
		}
		} break;
		case MotionEvent.ACTION_POINTER_DOWN: {
		}

		/**
		* Handles ACTION_POINTER_DOWN when in the touch exploring state. This event represents an
		* additional finger touching the screen.
		*/
		private void handleActionPointerDownStateTouchExploring() {
		// Another finger down means that if we have not started to deliver
		// hover events, we will not have to. The code for ACTION_MOVE will
		// decide what we will actually do next.
		mSendHoverEnterAndMoveDelayed.cancel();
		mSendHoverExitDelayed.cancel();
		} break;
		case MotionEvent.ACTION_MOVE: {
		}
		/**
		* Handles ACTION_MOVE while in the initial touch exploring state. This is where transitions to
		* delegating and dragging states are handled.
		*/
		private void handleActionMoveStateTouchExploring(
		MotionEvent event, MotionEvent rawEvent, int policyFlags) {
		final int pointerId = mReceivedPointerTracker.getPrimaryPointerId();
		final int pointerIndex = event.findPointerIndex(pointerId);
		final int pointerIdBits = (1 << pointerId);
		switch (event.getPointerCount()) {
		case 1: {
		case 1:
		// We have not started sending events since we try to
		// figure out what the user is doing.
		if (mSendHoverEnterAndMoveDelayed.isPending()) {
		// Cache the event until we discern exploration from gesturing.
		mSendHoverEnterAndMoveDelayed.addEvent(event);
		} else {
		if (mState.isTouchExplorationInProgress()) {
		} else if (mState.isTouchExplorationInProgress()) {
		sendTouchExplorationGestureStartAndHoverEnterIfNeeded(policyFlags);
		sendMotionEvent(event, MotionEvent.ACTION_HOVER_MOVE, pointerIdBits,
		policyFlags);
		sendMotionEvent(
		event, MotionEvent.ACTION_HOVER_MOVE, pointerIdBits, policyFlags);
		}
		}
		} break;
		case 2: {
		break;
		case 2:
		// More than one pointer so the user is not touch exploring
		// and now we have to decide whether to delegate or drag.
		if (mSendHoverEnterAndMoveDelayed.isPending()) {
		@@ -485,8 +511,7 @@ class TouchExplorer extends BaseEventStreamTransformation
		// scheduled sending events.
		mSendHoverEnterAndMoveDelayed.cancel();
		mSendHoverExitDelayed.cancel();
		} else {
		if (mState.isTouchExplorationInProgress()) {
		} else if (mState.isTouchExplorationInProgress()) {
		// If the user is touch exploring the second pointer may be
		// performing a double tap to activate an item without need
		// for the user to lift his exploring finger.
		@@ -496,8 +521,8 @@ class TouchExplorer extends BaseEventStreamTransformation
		mReceivedPointerTracker.getReceivedPointerDownX(pointerId)
		- rawEvent.getX(pointerIndex);
		final float deltaY =
		mReceivedPointerTracker.getReceivedPointerDownY(
		pointerId) - rawEvent.getY(pointerIndex);
		mReceivedPointerTracker.getReceivedPointerDownY(pointerId)
		- rawEvent.getY(pointerIndex);
		final double moveDelta = Math.hypot(deltaX, deltaY);
		if (moveDelta < mDoubleTapSlop) {
		break;
		@@ -506,7 +531,6 @@ class TouchExplorer extends BaseEventStreamTransformation
		// end since we transition to another state.
		sendHoverExitAndTouchExplorationGestureEndIfNeeded(policyFlags);
		}
		}

		// Remove move history before send injected non-move events
		event = MotionEvent.obtainNoHistory(event);
		@@ -515,17 +539,15 @@ class TouchExplorer extends BaseEventStreamTransformation
		// a given distance perform a drag.
		mState.startDragging();
		mDraggingPointerId = pointerId;
		event.setEdgeFlags(
		mReceivedPointerTracker.getLastReceivedDownEdgeFlags());
		sendMotionEvent(event, MotionEvent.ACTION_DOWN, pointerIdBits,
		policyFlags);
		event.setEdgeFlags(mReceivedPointerTracker.getLastReceivedDownEdgeFlags());
		sendMotionEvent(event, MotionEvent.ACTION_DOWN, pointerIdBits, policyFlags);
		} else {
		// Two pointers moving arbitrary are delegated to the view hierarchy.
		mState.startDelegating();
		sendDownForAllNotInjectedPointers(event, policyFlags);
		}
		} break;
		default: {
		break;
		default:
		// More than one pointer so the user is not touch exploring
		// and now we have to decide whether to delegate or drag.
		if (mSendHoverEnterAndMoveDelayed.isPending()) {
		@@ -543,10 +565,15 @@ class TouchExplorer extends BaseEventStreamTransformation
		mState.startDelegating();
		event = MotionEvent.obtainNoHistory(event);
		sendDownForAllNotInjectedPointers(event, policyFlags);
		break;
		}
		}
		} break;
		case MotionEvent.ACTION_UP: {

		/**
		* Handles ACTION_UP while in the initial touch exploring state. This event represents all
		* fingers being lifted from the screen.
		*/
		private void handleActionUpStateTouchExploring(MotionEvent event, int policyFlags) {
		mAms.onTouchInteractionEnd();
		final int pointerId = event.getPointerId(event.getActionIndex());
		final int pointerIdBits = (1 << pointerId);
		@@ -562,9 +589,6 @@ class TouchExplorer extends BaseEventStreamTransformation
		if (!mSendTouchInteractionEndDelayed.isPending()) {
		mSendTouchInteractionEndDelayed.post();
		}

		} break;
		}
		}

		/**