browser-plugin: Allow accepting drag-n-drop events.

content/browser/browser_plugin/browser_plugin_guest.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 BrowserPluginGuest represents the browser side of browser <--> renderer
 // communication. A BrowserPlugin (a WebPlugin) is on the renderer side of
 // browser <--> guest renderer communication. The 'guest' renderer is a
 // <browser> tag.
 //
 // BrowserPluginGuest lives on the UI thread of the browser process. It has a
@@ skipping 20 matching lines @@
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
 #include "base/time.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragStatus.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/gfx/rect.h"
 #include "webkit/glue/webcursor.h"
 
 class TransportDIB;
 struct ViewHostMsg_UpdateRect_Params;
+struct WebDropData;
 
 namespace WebKit {
 class WebInputEvent;
 }
 
 namespace content {
 
 class BrowserPluginHostFactory;
 class BrowserPluginEmbedder;
 class RenderProcessHost;
@@ skipping 20 matching lines @@
   }
 
   void set_guest_hang_timeout_for_testing(const base::TimeDelta& timeout) {
     guest_hang_timeout_ = timeout;
   }
 
   void set_embedder_render_process_host(
       RenderProcessHost* render_process_host) {
     embedder_render_process_host_ = render_process_host;
   }
+  void set_embedder_render_view_host(RenderViewHost* render_view_host) {
+    embedder_render_view_host_ = render_view_host;
+  }
 
   bool visible() const { return visible_; }
 
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
   // WebContentsObserver implementation.
   virtual void DidStartProvisionalLoadForFrame(
@@ skipping 57 matching lines @@
   //
   // It will also send a message to the guest renderer process to cleanup
   // resources such as dropping back buffers and adjusting memory limits (if in
   // compositing mode, see CCLayerTreeHost::setVisible).
   //
   // Additionally it will slow down Javascript execution and garbage collection.
   // See RenderThreadImpl::IdleHandler (executed when hidden) and
   // RenderThreadImpl::IdleHandlerInForegroundTab (executed when visible).
   void SetVisibility(bool embedder_visible, bool visible);
 
+  // Handles drag events from the embedder.
+  // When dragging, the drag events go to the embedder first, and if the drag
+  // happens on the browser plugin, then the plugin sends a corresponding
+  // drag-message to the guest. This routes the drag-message to the guest
+  // renderer.
+  void DragStatusUpdate(WebKit::WebDragStatus drag_status,
+                        const WebDropData& drop_data,
+                        WebKit::WebDragOperationsMask drag_mask,
+                        const gfx::Point& location);
+
+  // Updates the cursor during dragging.
+  // During dragging, if the guest notifies to update the cursor for a drag,
+  // then it is necessary to route the cursor update to the embedder correctly
+  // so that the cursor updates properly.
+  void UpdateDragCursor(WebKit::WebDragOperation operation);
+
   // Exposes the protected web_contents() from WebContentsObserver.
   WebContents* GetWebContents();
 
   // Kill the guest process.
   void Terminate();
 
   // Overridden in tests.
   virtual bool ViewTakeFocus(bool reverse);
   // If possible, navigate the guest to |relative_index| entries away from the
   // current navigation entry.
@@ skipping 38 matching lines @@
   // Called when a redirect notification occurs.
   void LoadRedirect(const GURL& old_url,
                     const GURL& new_url,
                     bool is_top_level);
 
   // Static factory instance (always NULL for non-test).
   static content::BrowserPluginHostFactory* factory_;
 
   NotificationRegistrar notification_registrar_;
   RenderProcessHost* embedder_render_process_host_;
+  RenderViewHost* embedder_render_view_host_;
   // An identifier that uniquely identifies a browser plugin guest within an
   // embedder.
   int instance_id_;
   scoped_ptr<TransportDIB> damage_buffer_;
 #if defined(OS_WIN)
   size_t damage_buffer_size_;
 #endif
   gfx::Size damage_view_size_;
   float damage_buffer_scale_factor_;
   scoped_ptr<IPC::Message> pending_input_event_reply_;
   gfx::Rect guest_rect_;
   WebCursor cursor_;
   IDMap<RenderViewHost> pending_updates_;
   int pending_update_counter_;
   base::TimeDelta guest_hang_timeout_;
   bool visible_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_