Merge "Fix a11y key event handling from multiple devices." into nyc-dev (4b88bddb) · Commits · e / os / android_frameworks_base

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

+26 −7

Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@ import android.content.Context;
		import android.os.PowerManager;
		import android.util.Pools.SimplePool;
		import android.util.Slog;
		import android.util.SparseBooleanArray;
		import android.view.Choreographer;
		import android.view.InputDevice;
		import android.view.InputEvent;
		@@ -637,10 +638,10 @@ class AccessibilityInputFilter extends InputFilter implements EventStreamTransfo
		}

		/**
		* Keeps state of stream of events from a keyboard device.
		* Keeps state of streams of events from all keyboard devices.
		*/
		private static class KeyboardEventStreamState extends EventStreamState {
		private boolean mEventSequenceStarted;
		private SparseBooleanArray mEventSequenceStartedMap = new SparseBooleanArray();

		public KeyboardEventStreamState() {
		reset();
		@@ -649,17 +650,35 @@ class AccessibilityInputFilter extends InputFilter implements EventStreamTransfo
		@Override
		final public void reset() {
		super.reset();
		mEventSequenceStarted = false;
		mEventSequenceStartedMap.clear();
		}

		/*
		* Key events from different devices may be interleaved. For example, the volume up and
		* down keys can come from different device IDs.
		*/
		@Override
		public boolean updateDeviceId(int deviceId) {
		return false;
		}

		// We manage all device ids simultaneously; there is no concept of validity.
		@Override
		public boolean deviceIdValid() {
		return true;
		}


		@Override
		final public boolean shouldProcessKeyEvent(KeyEvent event) {
		// Wait for a down key event to start processing.
		if (mEventSequenceStarted) {
		// For each keyboard device, wait for a down event from a device to start processing
		int deviceId = event.getDeviceId();
		if (mEventSequenceStartedMap.get(deviceId, false)) {
		return true;
		}
		mEventSequenceStarted = event.getAction() == KeyEvent.ACTION_DOWN;
		return mEventSequenceStarted;
		boolean shouldProcess = event.getAction() == KeyEvent.ACTION_DOWN;
		mEventSequenceStartedMap.put(deviceId, shouldProcess);
		return shouldProcess;
		}
		}
		}