Merge "Allow ExploreByTouchHelper client to populate node/event for host" (6bc3cab9) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/widget/ExploreByTouchHelper.java

+35 −0

Original line number	Diff line number	Diff line
		@@ -307,6 +307,10 @@ public abstract class ExploreByTouchHelper extends View.AccessibilityDelegate {
		private AccessibilityEvent createEventForHost(int eventType) {
		final AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
		mView.onInitializeAccessibilityEvent(event);

		// Allow the client to populate the event.
		onPopulateEventForHost(event);

		return event;
		}

		@@ -369,6 +373,10 @@ public abstract class ExploreByTouchHelper extends View.AccessibilityDelegate {
		private AccessibilityNodeInfo createNodeForHost() {
		final AccessibilityNodeInfo node = AccessibilityNodeInfo.obtain(mView);
		mView.onInitializeAccessibilityNodeInfo(node);
		final int realNodeCount = node.getChildCount();

		// Allow the client to populate the host node.
		onPopulateNodeForHost(node);

		// Add the virtual descendants.
		if (mTempArray == null) {
		@@ -378,6 +386,9 @@ public abstract class ExploreByTouchHelper extends View.AccessibilityDelegate {
		}
		final IntArray virtualViewIds = mTempArray;
		getVisibleVirtualViews(virtualViewIds);
		if (realNodeCount > 0 && virtualViewIds.size() > 0) {
		throw new RuntimeException("Views cannot have both real and virtual children");
		}

		final int N = virtualViewIds.size();
		for (int i = 0; i < N; i++) {
		@@ -691,6 +702,18 @@ public abstract class ExploreByTouchHelper extends View.AccessibilityDelegate {
		protected abstract void onPopulateEventForVirtualView(
		int virtualViewId, AccessibilityEvent event);

		/**
		* Populates an {@link AccessibilityEvent} with information about the host
		* view.
		* <p>
		* The default implementation is a no-op.
		*
		* @param event the event to populate with information about the host view
		*/
		protected void onPopulateEventForHost(AccessibilityEvent event) {
		// Default implementation is no-op.
		}

		/**
		* Populates an {@link AccessibilityNodeInfo} with information
		* about the specified item.
		@@ -749,6 +772,18 @@ public abstract class ExploreByTouchHelper extends View.AccessibilityDelegate {
		protected abstract void onPopulateNodeForVirtualView(
		int virtualViewId, AccessibilityNodeInfo node);

		/**
		* Populates an {@link AccessibilityNodeInfo} with information about the
		* host view.
		* <p>
		* The default implementation is a no-op.
		*
		* @param node the node to populate with information about the host view
		*/
		protected void onPopulateNodeForHost(AccessibilityNodeInfo node) {
		// Default implementation is no-op.
		}

		/**
		* Performs the specified accessibility action on the item associated
		* with the virtual view identifier. See