[Android] Hide handles when the containing view moves

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

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser;
 
 import android.app.Activity;
 import android.app.SearchManager;
 import android.content.ContentResolver;
 import android.content.Context;
@@ skipping 360 matching lines @@
     private ImeAdapter mImeAdapter;
     private ImeAdapter.AdapterInputConnectionFactory mAdapterInputConnectionFactory;
     private AdapterInputConnection mInputConnection;
 
     private SelectionHandleController mSelectionHandleController;
     private InsertionHandleController mInsertionHandleController;
 
     private Runnable mDeferredHandleFadeInRunnable;
 
     private PositionObserver mPositionObserver;
+    private PositionObserver.Listener mPositionListener;
 
     // Size of the viewport in physical pixels as set from onSizeChanged.
     private int mViewportWidthPix;
     private int mViewportHeightPix;
     private int mPhysicalBackingWidthPix;
     private int mPhysicalBackingHeightPix;
     private int mOverdrawBottomHeightPix;
     private int mViewportSizeOffsetWidthPix;
     private int mViewportSizeOffsetHeightPix;
 
@@ skipping 322 matching lines @@
         // up to the Android framework.
         //
         // TODO(husky): Once the native code has been updated so that the
         // HW acceleration flag can be set dynamically (Grace is doing this),
         // move this check into onAttachedToWindow(), where we can test for
         // HW support directly.
         mHardwareAccelerated = hasHardwareAcceleration(mContext);
 
         mContainerView = containerView;
         mPositionObserver = new ViewPositionObserver(mContainerView);
+        mPositionListener = new PositionObserver.Listener() {
+            @Override
+            public void onPositionChanged(int x, int y) {
+                if (isSelectionHandleShowing() || isInsertionHandleShowing()) {
+                    temporarilyHideTextHandles();
+                }
+            }
+        };
 
         int windowNativePointer = windowAndroid != null ? windowAndroid.getNativePointer() : 0;
 
         int viewAndroidNativePointer = 0;
         if (windowNativePointer != 0) {
             mViewAndroid = new ViewAndroid(windowAndroid, getViewAndroidDelegate());
             viewAndroidNativePointer = mViewAndroid.getNativePointer();
         }
 
         mNativeContentViewCore = nativeInit(mHardwareAccelerated,
@@ skipping 1357 matching lines @@
         }
     }
 
     private void hideHandles() {
         if (mSelectionHandleController != null) {
             mSelectionHandleController.hideAndDisallowAutomaticShowing();
         }
         if (mInsertionHandleController != null) {
             mInsertionHandleController.hideAndDisallowAutomaticShowing();
         }
+        mPositionObserver.removeListener(mPositionListener);
     }
 
     private void showSelectActionBar() {
         if (mActionMode != null) {
             mActionMode.invalidate();
             return;
         }
 
         // Start a new action mode with a SelectActionModeCallback.
         SelectActionModeCallback.ActionHandler actionHandler =
@@ skipping 410 matching lines @@
                 // Deselection
                 if (mSelectionHandleController != null) {
                     mSelectionHandleController.hideAndDisallowAutomaticShowing();
                 }
                 if (mInsertionHandleController != null) {
                     mInsertionHandleController.hideAndDisallowAutomaticShowing();
                 }
             }
             mHasSelection = false;
         }
+        if (isSelectionHandleShowing() || isInsertionHandleShowing()) {
+            mPositionObserver.addListener(mPositionListener);
+        }
     }
 
     @SuppressWarnings("unused")
     @CalledByNative
     private static void onEvaluateJavaScriptResult(
             String jsonResult, JavaScriptCallback callback) {
         callback.handleJavaScriptResult(jsonResult);
     }
 
     @SuppressWarnings("unused")
@@ skipping 726 matching lines @@
 
     private native void nativeAttachExternalVideoSurface(
             int nativeContentViewCoreImpl, int playerId, Surface surface);
 
     private native void nativeDetachExternalVideoSurface(
             int nativeContentViewCoreImpl, int playerId);
 
     private native void nativeSetAccessibilityEnabled(
             int nativeContentViewCoreImpl, boolean enabled);
 }