Set accessibility ID to window surface (1d56ce37) · Commits · e / os / android_frameworks_base

core/java/android/view/SurfaceControl.java

+6 −0

Original line number	Diff line number	Diff line
		@@ -441,6 +441,12 @@ public final class SurfaceControl implements Parcelable {
		*/
		public static final int METADATA_TASK_ID = 3;

		/**
		* Accessibility ID to allow association between surfaces and accessibility tree.
		* @hide
		*/
		public static final int METADATA_ACCESSIBILITY_ID = 4;

		/**
		* A wrapper around GraphicBuffer that contains extra information about how to
		* interpret the screenshot GraphicBuffer.

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

+16 −4

Original line number	Diff line number	Diff line
		@@ -972,6 +972,9 @@ public class AccessibilityWindowManager {
		if (shouldComputeWindows) {
		mWindowManagerInternal.computeWindowsForAccessibility(displayId);
		}

		mWindowManagerInternal.setAccessibilityIdToSurfaceMetadata(
		windowToken.asBinder(), windowId);
		return windowId;
		}

		@@ -991,7 +994,7 @@ public class AccessibilityWindowManager {
		final int removedWindowId = removeAccessibilityInteractionConnectionInternalLocked(
		token, mGlobalWindowTokens, mGlobalInteractionConnections);
		if (removedWindowId >= 0) {
		onAccessibilityInteractionConnectionRemovedLocked(removedWindowId);
		onAccessibilityInteractionConnectionRemovedLocked(removedWindowId, token);
		if (DEBUG) {
		Slog.i(LOG_TAG, "Removed global connection for pid:" + Binder.getCallingPid()
		+ " with windowId: " + removedWindowId + " and token: "
		@@ -1007,7 +1010,8 @@ public class AccessibilityWindowManager {
		getWindowTokensForUserLocked(userId),
		getInteractionConnectionsForUserLocked(userId));
		if (removedWindowIdForUser >= 0) {
		onAccessibilityInteractionConnectionRemovedLocked(removedWindowIdForUser);
		onAccessibilityInteractionConnectionRemovedLocked(
		removedWindowIdForUser, token);
		if (DEBUG) {
		Slog.i(LOG_TAG, "Removed user connection for pid:" + Binder.getCallingPid()
		+ " with windowId: " + removedWindowIdForUser + " and userId:"
		@@ -1069,18 +1073,21 @@ public class AccessibilityWindowManager {
		* @param userId The userId to remove
		*/
		private void removeAccessibilityInteractionConnectionLocked(int windowId, int userId) {
		IBinder window = null;
		if (userId == UserHandle.USER_ALL) {
		window = mGlobalWindowTokens.get(windowId);
		mGlobalWindowTokens.remove(windowId);
		mGlobalInteractionConnections.remove(windowId);
		} else {
		if (isValidUserForWindowTokensLocked(userId)) {
		window = getWindowTokensForUserLocked(userId).get(windowId);
		getWindowTokensForUserLocked(userId).remove(windowId);
		}
		if (isValidUserForInteractionConnectionsLocked(userId)) {
		getInteractionConnectionsForUserLocked(userId).remove(windowId);
		}
		}
		onAccessibilityInteractionConnectionRemovedLocked(windowId);
		onAccessibilityInteractionConnectionRemovedLocked(windowId, window);
		if (DEBUG) {
		Slog.i(LOG_TAG, "Removing interaction connection to windowId: " + windowId);
		}
		@@ -1091,12 +1098,17 @@ public class AccessibilityWindowManager {
		*
		* @param windowId Removed windowId
		*/
		private void onAccessibilityInteractionConnectionRemovedLocked(int windowId) {
		private void onAccessibilityInteractionConnectionRemovedLocked(
		int windowId, @Nullable IBinder binder) {
		// Active window will not update, if windows callback is unregistered.
		// Update active window to invalid, when its a11y interaction connection is removed.
		if (!isTrackingWindowsLocked() && windowId >= 0 && mActiveWindowId == windowId) {
		mActiveWindowId = AccessibilityWindowInfo.UNDEFINED_WINDOW_ID;
		}
		if (binder != null) {
		mWindowManagerInternal.setAccessibilityIdToSurfaceMetadata(
		binder, AccessibilityWindowInfo.UNDEFINED_WINDOW_ID);
		}
		}

		/**

services/core/java/com/android/server/wm/WindowManagerInternal.java

+6 −0

Original line number	Diff line number	Diff line
		@@ -550,4 +550,10 @@ public abstract class WindowManagerInternal {
		* the next time the activities are opened.
		*/
		public abstract void clearSnapshotCache();

		/**
		* Assigns accessibility ID a window surface as a layer metadata.
		*/
		public abstract void setAccessibilityIdToSurfaceMetadata(
		IBinder windowToken, int accessibilityWindowId);
		}

services/core/java/com/android/server/wm/WindowManagerService.java

+21 −0

Original line number	Diff line number	Diff line
		@@ -7401,6 +7401,27 @@ public class WindowManagerService extends IWindowManager.Stub
		public @Nullable KeyInterceptionInfo getKeyInterceptionInfoFromToken(IBinder inputToken) {
		return mKeyInterceptionInfoForToken.get(inputToken);
		}

		@Override
		public void setAccessibilityIdToSurfaceMetadata(
		IBinder windowToken, int accessibilityWindowId) {
		synchronized (mGlobalLock) {
		final WindowState state = mWindowMap.get(windowToken);
		if (state == null) {
		Slog.w(TAG, "Cannot find window which accessibility connection is added to");
		return;
		}
		try (SurfaceControl.Transaction t = new SurfaceControl.Transaction()) {
		t.setMetadata(
		state.mSurfaceControl,
		SurfaceControl.METADATA_ACCESSIBILITY_ID,
		accessibilityWindowId);
		t.apply();
		} finally {
		SurfaceControl.closeTransaction();
		}
		}
		}
		}

		void registerAppFreezeListener(AppFreezeListener listener) {