Show the image header for the Context Menu

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java

 // Copyright 2013 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.chrome.browser.contextmenu;
 
 import android.app.Activity;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.util.Pair;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.view.View;
 import android.view.View.OnCreateContextMenuListener;
 
 import org.chromium.base.Callback;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.metrics.RecordHistogram;
@@ skipping 11 matching lines @@
  */
 public class ContextMenuHelper implements OnCreateContextMenuListener {
     private long mNativeContextMenuHelper;
 
     private ContextMenuPopulator mPopulator;
     private ContextMenuParams mCurrentContextMenuParams;
     private Activity mActivity;
     private Callback<Integer> mCallback;
     private Runnable mOnMenuShown;
     private Runnable mOnMenuClosed;
+    private OnThumbnailReceivedListener mOnThumbnailReceivedListener;
+
+    interface OnThumbnailReceivedListener {
+        void onThumbnailReceived(Bitmap bitmap);
+    }
 
     private ContextMenuHelper(long nativeContextMenuHelper) {
         mNativeContextMenuHelper = nativeContextMenuHelper;
     }
 
     @CalledByNative
     private static ContextMenuHelper create(long nativeContextMenuHelper) {
         return new ContextMenuHelper(nativeContextMenuHelper);
     }
 
@@ skipping 51 matching lines @@
             public void run() {
                 if (mNativeContextMenuHelper == 0) return;
                 nativeOnContextMenuClosed(mNativeContextMenuHelper);
             }
         };
 
         if (ChromeFeatureList.isEnabled(ChromeFeatureList.CUSTOM_CONTEXT_MENU)) {
             List<Pair<Integer, List<ContextMenuItem>>> items =
                     mPopulator.buildContextMenu(null, mActivity, mCurrentContextMenuParams);
 
-            ContextMenuUi menuUi = new TabularContextMenuUi();
+            ContextMenuUi menuUi = new TabularContextMenuUi(this);
             menuUi.displayMenu(mActivity, mCurrentContextMenuParams, items, mCallback, mOnMenuShown,
                     mOnMenuClosed);
             return;
         }
 
         // The Platform Context Menu requires the listener within this hepler since this helper and
         // provides context menu for us to show.
         view.setOnCreateContextMenuListener(this);
         if (view.showContextMenu()) {
             mOnMenuShown.run();
@@ skipping 35 matching lines @@
 
     @CalledByNative
     private void onShareImageReceived(
             WindowAndroid windowAndroid, byte[] jpegImageData) {
         Activity activity = windowAndroid.getActivity().get();
         if (activity == null) return;
 
         ShareHelper.shareImage(activity, jpegImageData);
     }
 
+    public void getThumbnail() {

[Theresa, 2017/03/27 18:28:26]

nit: this needs a JavaDoc

[JJ, 2017/03/27 20:47:12]

Done.

+        if (mNativeContextMenuHelper == 0) return;
+        nativeRetrieveHeaderThumbnail(mNativeContextMenuHelper);
+    }
+
+    @CalledByNative
+    private void onHeaderThumbnailReceived(WindowAndroid windowAndroid, byte[] jpegImageData) {
+        Bitmap bitmap = BitmapFactory.decodeByteArray(jpegImageData, 0, jpegImageData.length);
+        if (mOnThumbnailReceivedListener != null) {
+            mOnThumbnailReceivedListener.onThumbnailReceived(bitmap);
+        }
+    }
+
     @Override
     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
         List<Pair<Integer, List<ContextMenuItem>>> items =
                 mPopulator.buildContextMenu(menu, v.getContext(), mCurrentContextMenuParams);
         ContextMenuUi menuUi = new PlatformContextMenuUi(menu);
         menuUi.displayMenu(mActivity, mCurrentContextMenuParams, items, mCallback, mOnMenuShown,
                 mOnMenuClosed);
     }
 
+    public void setOnThumbnailReceivedListener(OnThumbnailReceivedListener listener) {
+        mOnThumbnailReceivedListener = listener;
+    }
+
     /**
      * @return The {@link ContextMenuPopulator} responsible for populating the context menu.
      */
     @VisibleForTesting
     public ContextMenuPopulator getPopulator() {
         return mPopulator;
     }
 
     private native void nativeOnStartDownload(
             long nativeContextMenuHelper, boolean isLink, boolean isDataReductionProxyEnabled);
     private native void nativeSearchForImage(long nativeContextMenuHelper);
     private native void nativeShareImage(long nativeContextMenuHelper);
     private native void nativeOnContextMenuClosed(long nativeContextMenuHelper);
+    private native void nativeRetrieveHeaderThumbnail(long nativeContextMenuHelper);
 }