Added RenderView.DocumentHasImages query method

content/renderer/render_view_impl.cc

 // Copyright (c) 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.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <vector>
@@ skipping 947 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_ContextMenuClosed, OnContextMenuClosed)
     // TODO(viettrungluu): Move to a separate message filter.
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(ViewMsg_SetInLiveResize, OnSetInLiveResize)
 #endif
     IPC_MESSAGE_HANDLER(ViewMsg_SetHistoryLengthAndPrune,
                         OnSetHistoryLengthAndPrune)
     IPC_MESSAGE_HANDLER(ViewMsg_EnableViewSourceMode, OnEnableViewSourceMode)
     IPC_MESSAGE_HANDLER(JavaBridgeMsg_Init, OnJavaBridgeInit)
     IPC_MESSAGE_HANDLER(ViewMsg_SetAccessibilityMode, OnSetAccessibilityMode)
+    IPC_MESSAGE_HANDLER(ViewMsg_DocumentHasImages, OnDocumentHasImagesRequest)
 
     // Have the super handle all other messages.
     IPC_MESSAGE_UNHANDLED(handled = RenderWidget::OnMessageReceived(message))
   IPC_END_MESSAGE_MAP()
 
   if (!msg_is_ok) {
     // The message had a handler, but its deserialization failed.
     // Kill the renderer to avoid potential spoofing attacks.
     CHECK(false) << "Unable to deserialize message in RenderViewImpl.";
   }
@@ skipping 3474 matching lines @@
   // We must pass in the target_origin to do the security check on this side,
   // since it may have changed since the original postMessage call was made.
   WebSecurityOrigin target_origin;
   if (!params.target_origin.empty()) {
     target_origin =
         WebSecurityOrigin::createFromString(WebString(params.target_origin));
   }
   frame->dispatchMessageEventWithOriginCheck(target_origin, msg_event);
 }
 
+void RenderViewImpl::OnDocumentHasImagesRequest(int id) {
+  bool hasImages = false;
+  if (webview()) {
+    WebVector<WebElement> images;
+    webview()->mainFrame()->document().images(images);
+    hasImages = !images.isEmpty();
+  }
+  Send(new ViewHostMsg_DocumentHasImagesResponse(routing_id_, id, hasImages));
+}
+
 void RenderViewImpl::OnCSSInsertRequest(const string16& frame_xpath,
                                         const std::string& css) {
   WebFrame* frame = GetChildFrame(frame_xpath);
   if (!frame)
     return;
 
   frame->document().insertUserStyleSheet(
       WebString::fromUTF8(css),
       WebDocument::UserStyleAuthorLevel);
 }
@@ skipping 1189 matching lines @@
 bool RenderViewImpl::WebWidgetHandlesCompositorScheduling() const {
   return !!RenderThreadImpl::current()->compositor_thread();
 }
 
 void RenderViewImpl::OnJavaBridgeInit() {
   DCHECK(!java_bridge_dispatcher_);
 #if defined(ENABLE_JAVA_BRIDGE)
   java_bridge_dispatcher_ = new JavaBridgeDispatcher(this);
 #endif
 }