Remove boolean return value of dismissing more keys panel

Bug: 9334755
Change-Id: Ic29ab69cfbf9007e98fe67695f1854b4876eb976

java/src/com/android/inputmethod/keyboard/MainKeyboardView.java

@@ -1050,14 +1050,12 @@ public final class MainKeyboardView extends KeyboardView implements PointerTrack
     }
 
     @Override
-    public boolean onDismissMoreKeysPanel() {
+    public void onDismissMoreKeysPanel() {
         dimEntireKeyboard(false /* dimmed */);
         if (isShowingMoreKeysPanel()) {
             mPreviewPlacerView.removeView(mMoreKeysPanel.getContainerView());
             mMoreKeysPanel = null;
-            return true;
         }
-        return false;
     }
 
     @Override

java/src/com/android/inputmethod/keyboard/MoreKeysKeyboardView.java

@@ -34,7 +34,7 @@ public class MoreKeysKeyboardView extends KeyboardView implements MoreKeysPanel
     private final int[] mCoordinates = CoordinateUtils.newInstance();
 
     protected final KeyDetector mKeyDetector;
-    private Controller mController;
+    private Controller mController = EMPTY_CONTROLLER;
     protected KeyboardActionListener mListener;
     private int mOriginX;
     private int mOriginY;
@@ -173,9 +173,11 @@ public class MoreKeysKeyboardView extends KeyboardView implements MoreKeysPanel
     }
 
     @Override
-    public boolean dismissMoreKeysPanel() {
-        if (mController == null) return false;
-        return mController.onDismissMoreKeysPanel();
+    public void dismissMoreKeysPanel() {
+        if (!isShowingInParent()) {
+            return;
+        }
+        mController.onDismissMoreKeysPanel();
     }
 
     @Override

java/src/com/android/inputmethod/keyboard/MoreKeysPanel.java

@@ -29,7 +29,7 @@ public interface MoreKeysPanel {
         /**
          * Remove the current {@link MoreKeysPanel} from the target view.
          */
-        public boolean onDismissMoreKeysPanel();
+        public void onDismissMoreKeysPanel();
 
         /**
          * Instructs the parent to cancel the panel (e.g., when entering a different input mode).
@@ -37,6 +37,15 @@ public interface MoreKeysPanel {
         public void onCancelMoreKeysPanel();
     }
 
+    public static final Controller EMPTY_CONTROLLER = new Controller() {
+        @Override
+        public void onShowMoreKeysPanel(final MoreKeysPanel panel) {}
+        @Override
+        public void onDismissMoreKeysPanel() {}
+        @Override
+        public void onCancelMoreKeysPanel() {}
+    };
+
     /**
      * Initializes the layout and event handling of this {@link MoreKeysPanel} and calls the
      * controller's onShowMoreKeysPanel to add the panel's container view.
@@ -57,7 +66,7 @@ public interface MoreKeysPanel {
      * Dismisses the more keys panel and calls the controller's onDismissMoreKeysPanel to remove
      * the panel's container view.
      */
-    public boolean dismissMoreKeysPanel();
+    public void dismissMoreKeysPanel();
 
     /**
      * Process a move event on the more keys panel.

java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java

@@ -162,27 +162,27 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
         mSuggestionsStrip.removeAllViews();
         removeAllViews();
         addView(mSuggestionsStrip);
-        dismissMoreSuggestions();
+        mMoreSuggestionsView.dismissMoreKeysPanel();
     }
 
     private final MoreSuggestionsListener mMoreSuggestionsListener = new MoreSuggestionsListener() {
         @Override
         public void onSuggestionSelected(final int index, final SuggestedWordInfo wordInfo) {
             mListener.pickSuggestionManually(index, wordInfo);
-            dismissMoreSuggestions();
+            mMoreSuggestionsView.dismissMoreKeysPanel();
         }
 
         @Override
         public void onCancelInput() {
-            dismissMoreSuggestions();
+            mMoreSuggestionsView.dismissMoreKeysPanel();
         }
     };
 
     private final MoreKeysPanel.Controller mMoreSuggestionsController =
             new MoreKeysPanel.Controller() {
         @Override
-        public boolean onDismissMoreKeysPanel() {
-            return mMainKeyboardView.onDismissMoreKeysPanel();
+        public void onDismissMoreKeysPanel() {
+            mMainKeyboardView.onDismissMoreKeysPanel();
         }
 
         @Override
@@ -192,14 +192,10 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
 
         @Override
         public void onCancelMoreKeysPanel() {
-            dismissMoreSuggestions();
+            mMoreSuggestionsView.dismissMoreKeysPanel();
         }
     };
 
-    boolean dismissMoreSuggestions() {
-        return mMoreSuggestionsView.dismissMoreKeysPanel();
-    }
-
     @Override
     public boolean onLongClick(final View view) {
         AudioAndHapticFeedbackManager.getInstance().hapticAndAudioFeedback(
@@ -330,6 +326,6 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
     @Override
     protected void onDetachedFromWindow() {
         super.onDetachedFromWindow();
-        dismissMoreSuggestions();
+        mMoreSuggestionsView.dismissMoreKeysPanel();
     }
 }