Fixing issue where accessibility was reporting items behind an open folder. (Bug 8331717)

Change-Id: Ibaec4144ee911c6d784737cf56a4fc8a1dad2886

src/com/android/launcher2/DragLayer.java

@@ -34,6 +34,7 @@ import android.view.ViewGroup;
 import android.view.ViewParent;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;
+import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.animation.DecelerateInterpolator;
 import android.view.animation.Interpolator;
 import android.widget.FrameLayout;
@@ -221,6 +222,31 @@ public class DragLayer extends FrameLayout implements ViewGroup.OnHierarchyChang
         }
     }
 
+    @Override
+    public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
+        Folder currentFolder = mLauncher.getWorkspace().getOpenFolder();
+        if (currentFolder != null) {
+            if (child == currentFolder) {
+                return super.onRequestSendAccessibilityEvent(child, event);
+            }
+            // Skip propagating onRequestSendAccessibilityEvent all for other children
+            // when a folder is open
+            return false;
+        }
+        return super.onRequestSendAccessibilityEvent(child, event);
+    }
+
+    @Override
+    public void addChildrenForAccessibility(ArrayList<View> childrenForAccessibility) {
+        Folder currentFolder = mLauncher.getWorkspace().getOpenFolder();
+        if (currentFolder != null) {
+            // Only add the folder as a child for accessibility when it is open
+            childrenForAccessibility.add(currentFolder);
+        } else {
+            super.addChildrenForAccessibility(childrenForAccessibility);
+        }
+    }
+
     @Override
     public boolean onHoverEvent(MotionEvent ev) {
         // If we've received this, we've already done the necessary handling

src/com/android/launcher2/Launcher.java

@@ -2287,6 +2287,11 @@ public final class Launcher extends Activity
         }
         folder.animateOpen();
         growAndFadeOutFolderIcon(folderIcon);
+
+        // Notify the accessibility manager that this folder "window" has appeared and occluded
+        // the workspace items
+        folder.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
+        getDragLayer().sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
     }
 
     public void closeFolder() {
@@ -2311,6 +2316,10 @@ public final class Launcher extends Activity
             shrinkAndFadeInFolderIcon(fi);
         }
         folder.animateClosed();
+
+        // Notify the accessibility manager that this folder "window" has disappeard and no
+        // longer occludeds the workspace items
+        getDragLayer().sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
     }
 
     public boolean onLongClick(View v) {