Show the image header for the Context Menu

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

Index: chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
index add1beea26b99973b26161438dc23c41689de6b0..6f7f4ad22dcb4a2b2bd4f5d5383183bc385668f1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuHelper.java
@@ -5,6 +5,8 @@
 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;
@@ -36,6 +38,11 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
     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;
@@ -107,7 +114,7 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
             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;
@@ -163,6 +170,19 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
         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 =
@@ -172,6 +192,10 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
                 mOnMenuClosed);
     }
 
+    public void setOnThumbnailReceivedListener(OnThumbnailReceivedListener listener) {
+        mOnThumbnailReceivedListener = listener;
+    }
+
     /**
      * @return The {@link ContextMenuPopulator} responsible for populating the context menu.
      */
@@ -185,4 +209,5 @@ public class ContextMenuHelper implements OnCreateContextMenuListener {
     private native void nativeSearchForImage(long nativeContextMenuHelper);
     private native void nativeShareImage(long nativeContextMenuHelper);
     private native void nativeOnContextMenuClosed(long nativeContextMenuHelper);
+    private native void nativeRetrieveHeaderThumbnail(long nativeContextMenuHelper);
 }