Implemented GetWindowSnapshot on RenderViewImpl

content/renderer/render_view_impl.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 347 matching lines @@
                                     std::string* actual_mime_type);
 
   void TransferActiveWheelFlingAnimation(
       const WebKit::WebActiveWheelFlingParameters& params);
 
   // Returns true if the focused element is editable text from the perspective
   // of IME support (also used for on-screen keyboard). Works correctly inside
   // supported PPAPI plug-ins.
   bool HasIMETextFocus();
 
+  // Callback for use with GetWindowSnapshot.
+  typedef base::Callback<void(
+      const gfx::Size&, const std::vector<unsigned char>&)>
+      WindowSnapshotCallback;
+
+  void GetWindowSnapshot(const WindowSnapshotCallback& callback);
+
   // IPC::Listener implementation ----------------------------------------------
 
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   // WebKit::WebWidgetClient implementation ------------------------------------
 
   // Most methods are handled by RenderWidget.
   virtual void didFocus();
   virtual void didBlur();
   virtual void show(WebKit::WebNavigationPolicy policy);
@@ skipping 637 matching lines @@
 #elif defined(OS_MACOSX)
   void OnCopyToFindPboard();
   void OnPluginImeCompositionCompleted(const string16& text, int plugin_id);
   CONTENT_EXPORT void OnSelectPopupMenuItem(int selected_index);
   void OnSetInLiveResize(bool in_live_resize);
   void OnSetWindowVisibility(bool visible);
   void OnWindowFrameChanged(const gfx::Rect& window_frame,
                             const gfx::Rect& view_frame);
 #endif
 
+  void OnWindowSnapshotCompleted(const int snapshot_id,
+      const gfx::Size& size, const std::vector<unsigned char>& png);
+
 
   // Adding a new message handler? Please add it in alphabetical order above
   // and put it in the same position in the .cc file.
 
   // Misc private functions ----------------------------------------------------
   void ZoomFactorHelper(PageZoom zoom, int zoom_center_x, int zoom_center_y,
                         float scaling_increment);
 
   void AltErrorPageFinished(WebKit::WebFrame* frame,
                             const WebKit::WebURLError& original_error,
@@ skipping 452 matching lines @@
   // is fine.
   ObserverList<RenderViewObserver> observers_;
 
   // Used to inform didChangeSelection() when it is called in the context
   // of handling a ViewMsg_SelectRange IPC.
   bool handling_select_range_;
 
   // Wraps the |webwidget_| as a MouseLockDispatcher::LockTarget interface.
   scoped_ptr<MouseLockDispatcher::LockTarget> webwidget_mouse_lock_target_;
 
+  // State associated with the GetWindowSnapshot function.
+  int next_snapshot_id_;
+  typedef std::map<int, WindowSnapshotCallback>
+      PendingSnapshotMap;
+  PendingSnapshotMap pending_snapshots_;
+
   // Plugins -------------------------------------------------------------------
 
   // All the currently active plugin delegates for this RenderView; kept so
   // that we can enumerate them to send updates about things like window
   // location or tab focus and visibily. These are non-owning references.
   std::set<WebPluginDelegateProxy*> plugin_delegates_;
 
 #if defined(OS_WIN)
   // The ID of the focused NPAPI plug-in.
   int focused_plugin_id_;
@@ skipping 48 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_