Merge "Fix a11y cache correctness bug" into pi-dev (3fbe5664) · Commits · e / os / android_frameworks_base

core/java/android/view/accessibility/AccessibilityCache.java

+11 −3

Original line number	Diff line number	Diff line
		@@ -418,20 +418,28 @@ public class AccessibilityCache {
		*
		* @param nodes The nodes in the hosting window.
		* @param rootNodeId The id of the root to evict.
		*
		* @return {@code true} if the cache was cleared
		*/
		private void clearSubTreeRecursiveLocked(LongSparseArray<AccessibilityNodeInfo> nodes,
		private boolean clearSubTreeRecursiveLocked(LongSparseArray<AccessibilityNodeInfo> nodes,
		long rootNodeId) {
		AccessibilityNodeInfo current = nodes.get(rootNodeId);
		if (current == null) {
		return;
		// The node isn't in the cache, but its descendents might be.
		clear();
		return true;
		}
		nodes.remove(rootNodeId);
		final int childCount = current.getChildCount();
		for (int i = 0; i < childCount; i++) {
		final long childNodeId = current.getChildId(i);
		clearSubTreeRecursiveLocked(nodes, childNodeId);
		if (clearSubTreeRecursiveLocked(nodes, childNodeId)) {
		current.recycle();
		return true;
		}
		}
		current.recycle();
		return false;
		}

		/**

+20 −0

Original line number	Diff line number	Diff line
		@@ -299,6 +299,26 @@ public class AccessibilityCacheTest {
		}
		}

		@Test
		public void subTreeChangeEventFromUncachedNode_clearsNodeInCache() {
		AccessibilityNodeInfo nodeInfo = getNodeWithA11yAndWindowId(CHILD_VIEW_ID, WINDOW_ID_1);
		long id = nodeInfo.getSourceNodeId();
		mAccessibilityCache.add(nodeInfo);
		nodeInfo.recycle();

		AccessibilityEvent event = AccessibilityEvent
		.obtain(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
		event.setContentChangeTypes(AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE);
		event.setSource(getMockViewWithA11yAndWindowIds(PARENT_VIEW_ID, WINDOW_ID_1));

		mAccessibilityCache.onAccessibilityEvent(event);
		AccessibilityNodeInfo shouldBeNull = mAccessibilityCache.getNode(WINDOW_ID_1, id);
		if (shouldBeNull != null) {
		shouldBeNull.recycle();
		}
		assertNull(shouldBeNull);
		}

		@Test
		public void scrollEvent_clearsNodeAndChild() {
		AccessibilityEvent event = AccessibilityEvent