[Android] Focus/Blur contents when window focus changes

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
index 3493dfef590fc0fe5740ccf545029b8efa968368..91ea2954f7e6e2d62aa9dc9942abcf4af4626453 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java
@@ -360,6 +360,11 @@ public class ContentViewCore
     // ResultReceiver in the InputMethodService (IME app) gets gc'ed.
     private ShowKeyboardResultReceiver mShowKeyboardResultReceiver;
 
+    // Whether this ContentViewCore has view focus.
+    private boolean mHasViewFocus;
+    // Whether this ContentViewCore has window focus.
+    private boolean mHasWindowFocus;
+
     // The list of observers that are notified when ContentViewCore changes its WindowAndroid.
     private final ObserverList<WindowAndroidChangedObserver> mWindowAndroidChangedObservers;
 
@@ -665,6 +670,8 @@ public class ContentViewCore
             }
 
             mContainerView = containerView;
+            onFocusChangedInternal(getRealWindowFocusedState(), containerView.hasFocus(),
+                    false /* hideKeyboardOnBlur */);
             mContainerView.setClickable(true);
             if (mSelectionPopupController != null) {
                 mSelectionPopupController.setContainerView(containerView);
@@ -680,6 +687,19 @@ public class ContentViewCore
         }
     }
 
+    /**
+     * Note: We don't use View#hasWindowFocus() because it returns incorrect values when the View
+     * doesn't have View focus.
+     * @return Whether the containerView actually has Window focus.
+     */
+    private boolean getRealWindowFocusedState() {
+        int[] states = mContainerView.getDrawableState();
+        for (int state : states) {
+            if ((state & android.R.attr.state_window_focused) != 0) return true;
+        }
+        return false;
+    }
+
     @CalledByNative
     private void onNativeContentViewCoreDestroyed(long nativeContentViewCore) {
         assert nativeContentViewCore == mNativeContentViewCore;
@@ -1329,22 +1349,35 @@ public class ContentViewCore
      * @see View#onWindowFocusChanged(boolean)
      */
     public void onWindowFocusChanged(boolean hasWindowFocus) {
+        if (mHasWindowFocus == hasWindowFocus) return;
         mImeAdapter.onWindowFocusChanged(hasWindowFocus);
         if (!hasWindowFocus) resetGestureDetection();
         mSelectionPopupController.onWindowFocusChanged(hasWindowFocus);
         for (mGestureStateListenersIterator.rewind(); mGestureStateListenersIterator.hasNext();) {
             mGestureStateListenersIterator.next().onWindowFocusChanged(hasWindowFocus);
         }
+        onFocusChangedInternal(hasWindowFocus, mHasViewFocus, true /* hideKeyboardOnBlur */);
+    }
+
+    public void onFocusChanged(boolean hasViewFocus, boolean hideKeyboardOnBlur) {
+        if (mHasViewFocus == hasViewFocus) return;
+        onFocusChangedInternal(mHasWindowFocus, hasViewFocus, hideKeyboardOnBlur);
     }
 
-    public void onFocusChanged(boolean gainFocus, boolean hideKeyboardOnBlur) {
-        mImeAdapter.onViewFocusChanged(gainFocus, hideKeyboardOnBlur);
+    private void onFocusChangedInternal(
+            boolean hasWindowFocus, boolean hasViewFocus, boolean hideKeyboardOnBlur) {
+        boolean hadInputFocus = mHasWindowFocus && mHasViewFocus;
+        boolean hasInputFocus = hasWindowFocus && hasViewFocus;
+        mHasWindowFocus = hasWindowFocus;
+        mHasViewFocus = hasViewFocus;
+        if (hasInputFocus == hadInputFocus) return;
+        mImeAdapter.onViewFocusChanged(hasInputFocus, hideKeyboardOnBlur);
 
         if (mJoystickScrollProvider != null) {
-            mJoystickScrollProvider.setEnabled(gainFocus && !isFocusedNodeEditable());
+            mJoystickScrollProvider.setEnabled(hasInputFocus && !isFocusedNodeEditable());
         }
 
-        if (gainFocus) {
+        if (hasInputFocus) {
             restoreSelectionPopupsIfNecessary();
         } else {
             cancelRequestToScrollFocusedEditableNodeIntoView();
@@ -1359,7 +1392,7 @@ public class ContentViewCore
                 clearSelection();
             }
         }
-        if (mNativeContentViewCore != 0) nativeSetFocus(mNativeContentViewCore, gainFocus);
+        if (mNativeContentViewCore != 0) nativeSetFocus(mNativeContentViewCore, hasInputFocus);
     }
 
     /**