1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // A BrowserPluginEmbedder handles messages coming from a BrowserPlugin's 6 // embedder that are not directed at any particular existing guest process. 7 // In the beginning, when a BrowserPlugin instance in the embedder renderer 8 // process requests an initial navigation, the WebContents for that renderer 9 // renderer creates a BrowserPluginEmbedder for itself. The 10 // BrowserPluginEmbedder, in turn, forwards the requests to a 11 // BrowserPluginGuestManager, which creates and manages the lifetime of the new 12 // guest. 13 14 #ifndef CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_ 15 #define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_ 16 17 #include <map> 18 19 #include "base/memory/weak_ptr.h" 20 #include "base/values.h" 21 #include "content/public/browser/web_contents.h" 22 #include "content/public/browser/web_contents_observer.h" 23 #include "third_party/WebKit/public/web/WebDragOperation.h" 24 25 struct BrowserPluginHostMsg_Attach_Params; 26 struct BrowserPluginHostMsg_ResizeGuest_Params; 27 28 namespace gfx { 29 class Point; 30 } 31 32 namespace content { 33 34 class BrowserPluginGuest; 35 class BrowserPluginGuestManager; 36 class RenderWidgetHostImpl; 37 class WebContentsImpl; 38 struct NativeWebKeyboardEvent; 39 40 class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver { 41 public: 42 virtual ~BrowserPluginEmbedder(); 43 44 static BrowserPluginEmbedder* Create(WebContentsImpl* web_contents); 45 46 // Returns this embedder's WebContentsImpl. 47 WebContentsImpl* GetWebContents() const; 48 49 // Called when embedder's |rwh| has sent screen rects to renderer. 50 void DidSendScreenRects(); 51 52 // WebContentsObserver implementation. 53 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 54 55 void DragSourceEndedAt(int client_x, int client_y, int screen_x, 56 int screen_y, blink::WebDragOperation operation); 57 58 void OnUpdateDragCursor(bool* handled); 59 60 void DragEnteredGuest(BrowserPluginGuest* guest); 61 62 void DragLeftGuest(BrowserPluginGuest* guest); 63 64 void StartDrag(BrowserPluginGuest* guest); 65 66 // Sends EndSystemDrag message to the guest that initiated the last drag/drop 67 // operation, if there's any. 68 void SystemDragEnded(); 69 70 // Used to handle special keyboard events. 71 bool HandleKeyboardEvent(const NativeWebKeyboardEvent& event); 72 73 private: 74 explicit BrowserPluginEmbedder(WebContentsImpl* web_contents); 75 76 BrowserPluginGuestManager* GetBrowserPluginGuestManager() const; 77 78 void ClearGuestDragStateIfApplicable(); 79 80 bool DidSendScreenRectsCallback(WebContents* guest_web_contents); 81 82 bool SetZoomLevelCallback(double level, WebContents* guest_web_contents); 83 84 bool UnlockMouseIfNecessaryCallback(bool* mouse_unlocked, WebContents* guest); 85 86 // Message handlers. 87 void OnAttach(int instance_id, 88 const BrowserPluginHostMsg_Attach_Params& params); 89 void OnPluginAtPositionResponse(int instance_id, 90 int request_id, 91 const gfx::Point& position); 92 93 // Used to correctly update the cursor when dragging over a guest, and to 94 // handle a race condition when dropping onto the guest that started the drag 95 // (the race is that the dragend message arrives before the drop message so 96 // the drop never takes place). 97 // crbug.com/233571 98 base::WeakPtr<BrowserPluginGuest> guest_dragging_over_; 99 100 // Pointer to the guest that started the drag, used to forward necessary drag 101 // status messages to the correct guest. 102 base::WeakPtr<BrowserPluginGuest> guest_started_drag_; 103 104 // Keeps track of "dragend" state. 105 bool guest_drag_ending_; 106 107 base::WeakPtrFactory<BrowserPluginEmbedder> weak_ptr_factory_; 108 109 DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder); 110 }; 111 112 } // namespace content 113 114 #endif // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_ 115