Drag-and-drop: updateDragCursor

content/browser/browser_plugin/browser_plugin_embedder.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.
 
 // A BrowserPluginEmbedder handles messages coming from a BrowserPlugin's
 // embedder that are not directed at any particular existing guest process.
 // In the beginning, when a BrowserPlugin instance in the embedder renderer
 // process requests an initial navigation, the WebContents for that renderer
 // renderer creates a BrowserPluginEmbedder for itself. The
 // BrowserPluginEmbedder, in turn, forwards the requests to a
@@ skipping 20 matching lines @@
 class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
  public:
   ~BrowserPluginEmbedder() override;
 
   static BrowserPluginEmbedder* Create(WebContentsImpl* web_contents);
 
   // Called when embedder's |rwh| has sent screen rects to renderer.
   void DidSendScreenRects();
 
   // WebContentsObserver implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
   bool OnMessageReceived(const IPC::Message& message,
                          RenderFrameHost* render_frame_host) override;
 
   // Sends a 'dragend' message to the guest that started the drag.
   void DragSourceEndedAt(int client_x, int client_y, int screen_x,
       int screen_y, blink::WebDragOperation operation);
 
   // Indicates that a drag operation has entered into the bounds of a given
   // |guest|. Returns whether the |guest| also started the operation.
   bool DragEnteredGuest(BrowserPluginGuest* guest);
 
   // Indicates that a drag operation has left the bounds of a given |guest|.
   void DragLeftGuest(BrowserPluginGuest* guest);
 
   // Called when the screen info has changed.
   void ScreenInfoChanged();
 
   // Closes modal dialogs in all of the guests.
   void CancelGuestDialogs();
 
   // Called by WebContentsViewGuest when a drag operation is started within
   // |guest|. This |guest| will be signaled at the end of the drag operation.
   void StartDrag(BrowserPluginGuest* guest);
 
   // Sends EndSystemDrag message to the guest that initiated the last drag/drop
   // operation, if there's any.
   void SystemDragEnded();
 
+  // The page wants to update the mouse cursor during a drag & drop
+  // operation. This update will be suppressed if the cursor is dragging over a
+  // guest.
+  bool OnUpdateDragCursor();
+
   // Used to handle special keyboard events.
   bool HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
 
   // Find the given |search_text| in the page. Returns true if the find request
   // is handled by this browser plugin embedder.
   bool Find(int request_id,
             const base::string16& search_text,
             const blink::WebFindOptions& options);
   bool StopFinding(StopFindAction action);
 
@@ skipping 30 matching lines @@
                           WebContents* guest);
   static bool StopFindingInGuest(StopFindAction action, WebContents* guest);
 
   static bool GuestRecentlyAudibleCallback(WebContents* guest);
 
   // Message handlers.
 
   void OnAttach(RenderFrameHost* render_frame_host,
                 int instance_id,
                 const BrowserPluginHostMsg_Attach_Params& params);
-  void OnUpdateDragCursor(bool* handled);
 
   // Used to correctly update the cursor when dragging over a guest, and to
   // handle a race condition when dropping onto the guest that started the drag
   // (the race is that the dragend message arrives before the drop message so
   // the drop never takes place).
   // crbug.com/233571
   base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
 
   // Pointer to the guest that started the drag, used to forward necessary drag
   // status messages to the correct guest.
   base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
 
   // Keeps track of "dragend" state.
   bool guest_drag_ending_;
 
   base::WeakPtrFactory<BrowserPluginEmbedder> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_