Implement "Copy image" for canvas (blink side).

Source/web/ContextMenuClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 206 matching lines @@
     // We can always select all...
     data.editFlags |= WebContextMenuData::CanSelectAll;
     data.editFlags |= WebContextMenuData::CanTranslate;
 
     // Links, Images, Media tags, and Image/Media-Links take preference over
     // all else.
     data.linkURL = r.absoluteLinkURL();
 
     if (isHTMLCanvasElement(r.innerNonSharedNode())) {
         data.mediaType = WebContextMenuData::MediaTypeCanvas;
+        data.hasImageContents = true;
     } else if (!r.absoluteImageURL().isEmpty()) {
         data.srcURL = r.absoluteImageURL();
         data.mediaType = WebContextMenuData::MediaTypeImage;
         data.mediaFlags |= WebContextMenuData::MediaCanPrint;
+
+        // An image can to be null for many reasons, like being blocked, no image
+        // data received from server yet.
+        data.hasImageContents = r.image() && !(r.image()->isNull());

[yosin_UTC9, 2014/06/20 04:24:10]

nit: We don't need to have parenthesis,  |!r.image()->isNull()| is fine.

     } else if (!r.absoluteMediaURL().isEmpty()) {
         data.srcURL = r.absoluteMediaURL();
 
         // We know that if absoluteMediaURL() is not empty, then this
         // is a media element.
         HTMLMediaElement* mediaElement = toHTMLMediaElement(r.innerNonSharedNode());
         if (isHTMLVideoElement(*mediaElement))
             data.mediaType = WebContextMenuData::MediaTypeVideo;
         else if (isHTMLAudioElement(*mediaElement))
             data.mediaType = WebContextMenuData::MediaTypeAudio;
@@ skipping 39 matching lines @@
                 data.srcURL = pluginElement->document().completeURL(pluginElement->url());
                 data.mediaFlags |= WebContextMenuData::MediaCanSave;
 
                 // Add context menu commands that are supported by the plugin.
                 if (plugin->plugin()->canRotateView())
                     data.mediaFlags |= WebContextMenuData::MediaCanRotate;
             }
         }
     }
 
-    // An image can to be null for many reasons, like being blocked, no image
-    // data received from server yet.
-    data.hasImageContents =
-        (data.mediaType == WebContextMenuData::MediaTypeImage)
-        && r.image() && !(r.image()->isNull());
-
     // If it's not a link, an image, a media element, or an image/media link,
     // show a selection menu or a more generic page menu.
     if (selectedFrame->document()->loader())
         data.frameEncoding = selectedFrame->document()->encodingName();
 
     // Send the frame and page URLs in any case.
     data.pageURL = urlFromFrame(m_webView->mainFrameImpl()->frame());
     if (selectedFrame != m_webView->mainFrameImpl()->frame()) {
         data.frameURL = urlFromFrame(selectedFrame);
         RefPtr<HistoryItem> historyItem = selectedFrame->loader().currentItem();
@@ skipping 120 matching lines @@
         outputItems[i] = subItems[i];
     subMenuItems.swap(outputItems);
 }
 
 void ContextMenuClientImpl::populateCustomMenuItems(const WebCore::ContextMenu* defaultMenu, WebContextMenuData* data)
 {
     populateSubMenuItems(defaultMenu->items(), data->customItems);
 }
 
 } // namespace blink