Implement requestKeyboardShortcuts for PopupDecorView

A call to requestKeyboardShortcuts from popup menu might be dispatched
to PopupDecorView or DecorView depending on WindowManagerService's
focusedWindow at that moment.

In case it gets dispatched to PopupDecorView, we would like to resend it
to parent activity's decor view (which can then handle it
appropriately). The change adds a notion of mParentRootView which keeps
track of popup's parent's decor view. The request is then routed
appropriately so as to display the corresponding shortcuts. mAnchor
cannot be used as it gets nulled (by dismiss) by the time
requestKeyboardShortcuts gets called.

Bug: 31850671
Change-Id: I0ee3a1c7801c6d3fce8748bc7513382f250c5c63
Fixes: 31850671
Test: cts-tradefed run cts-dev -m CtsAppTestCases -t
android.app.cts.ActivityKeyboardShortcutsTest#testRequestShowKeyboardShortcuts

1 files changed, 20 insertions, 0 deletions

diff --git a/core/java/android/widget/PopupWindow.java b/core/java/android/widget/PopupWindow.java
index fc1520b84259..1de7eafa4b07 100644
--- a/core/java/android/widget/PopupWindow.java
+++ b/core/java/android/widget/PopupWindow.java
@@ -42,6 +42,7 @@ import android.transition.TransitionSet;
 import android.util.AttributeSet;
 import android.view.Gravity;
 import android.view.KeyEvent;
+import android.view.KeyboardShortcutGroup;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnAttachStateChangeListener;
@@ -57,6 +58,7 @@ import android.view.WindowManager.LayoutParams;
 import com.android.internal.R;
 
 import java.lang.ref.WeakReference;
+import java.util.List;
 
 /**
  * <p>
@@ -139,6 +141,12 @@ public class PopupWindow {
     private Context mContext;
     private WindowManager mWindowManager;
 
+    /**
+     * Keeps track of popup's parent's decor view. This is needed to dispatch
+     * requestKeyboardShortcuts to the owning Activity.
+     */
+    private WeakReference<View> mParentRootView;
+
     private boolean mIsShowing;
     private boolean mIsTransitioningToDismiss;
     private boolean mIsDropdown;
@@ -1119,6 +1127,7 @@ public class PopupWindow {
      * @param y the popup's y location offset
      */
     public void showAtLocation(View parent, int gravity, int x, int y) {
+        mParentRootView = new WeakReference<>(parent.getRootView());
         showAtLocation(parent.getWindowToken(), gravity, x, y);
     }
 
@@ -2229,6 +2238,7 @@ public class PopupWindow {
         mAnchor = new WeakReference<>(anchor);
         mAnchorRoot = new WeakReference<>(anchorRoot);
         mIsAnchorRootAttached = anchorRoot.isAttachedToWindow();
+        mParentRootView = mAnchorRoot;
 
         mAnchorXoff = xoff;
         mAnchorYoff = yoff;
@@ -2414,6 +2424,16 @@ public class PopupWindow {
                         TransitionManager.endTransitions(PopupDecorView.this);
                     }
                 };
+
+        @Override
+        public void requestKeyboardShortcuts(List<KeyboardShortcutGroup> list, int deviceId) {
+            if (mParentRootView != null) {
+                View parentRoot = mParentRootView.get();
+                if (parentRoot != null) {
+                    parentRoot.requestKeyboardShortcuts(list, deviceId);
+                }
+            }
+        }
     }
 
     private class PopupBackgroundView extends FrameLayout {