Cling allows touch explore and accessibility focus search behind it.

1. Touch exploration is performed through hover events and
   the cling has to consume them to prevent touch exploring
   content behind it to achieve modal window like behavior.

2. Since the cling should behave as a modal window, the
   accessibility focus search should not returning items
   behind the cling, so the focus search should use the
   cling as its root.

bug:6538549

Change-Id: I8545b6ae3ac85a363cc371e1a608d55b9abd5de8

2 files changed, 34 insertions, 0 deletions

diff --git a/src/com/android/launcher2/Cling.java b/src/com/android/launcher2/Cling.java
index d61b9883a..5cde0b447 100644
--- a/src/com/android/launcher2/Cling.java
+++ b/src/com/android/launcher2/Cling.java
@@ -28,6 +28,10 @@ import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
+import android.view.FocusFinder;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.accessibility.AccessibilityManager;
 import android.widget.FrameLayout;
 
 import com.android.launcher.R;
@@ -130,6 +134,35 @@ public class Cling extends FrameLayout {
     }
 
     @Override
+    public View findViewToTakeAccessibilityFocusFromHover(View child, View descendant) {
+        if (descendant.includeForAccessibility()) {
+            return descendant;
+        }
+        return null;
+    }
+
+    @Override
+    public View focusSearch(int direction) {
+        return this.focusSearch(null, direction);
+    }
+
+    @Override
+    public View focusSearch(View focused, int direction) {
+        return FocusFinder.getInstance().findNextFocus(this, focused, direction);
+    }
+
+    @Override
+    public boolean onHoverEvent(MotionEvent event) {
+        return (mDrawIdentifier.equals(WORKSPACE_PORTRAIT)
+                || mDrawIdentifier.equals(WORKSPACE_LANDSCAPE)
+                || mDrawIdentifier.equals(WORKSPACE_LARGE)
+                || mDrawIdentifier.equals(ALLAPPS_PORTRAIT)
+                || mDrawIdentifier.equals(ALLAPPS_LANDSCAPE)
+                || mDrawIdentifier.equals(ALLAPPS_LARGE)
+                || mDrawIdentifier.equals(WORKSPACE_CUSTOM));
+    }
+
+    @Override
     public boolean onTouchEvent(android.view.MotionEvent event) {
         if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT) ||
             mDrawIdentifier.equals(WORKSPACE_LANDSCAPE) ||
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index e6c25cbdc..87ca4c7c9 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -3466,6 +3466,7 @@ public final class Launcher extends Activity
             cling.init(this, positionData);
             cling.setVisibility(View.VISIBLE);
             cling.setLayerType(View.LAYER_TYPE_HARDWARE, null);
+            cling.requestAccessibilityFocus();
             if (animate) {
                 cling.buildLayer();
                 cling.setAlpha(0f);