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      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 #ifndef CONTENT_RENDERER_DOM_STORAGE_DOM_STORAGE_DISPATCHER_H_
      6 #define CONTENT_RENDERER_DOM_STORAGE_DOM_STORAGE_DISPATCHER_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 
     10 class GURL;
     11 struct DOMStorageMsg_Event_Params;
     12 
     13 namespace IPC {
     14 class Message;
     15 }
     16 
     17 namespace content {
     18 
     19 class DOMStorageCachedArea;
     20 
     21 // Dispatches DomStorage related messages sent to a renderer process from the
     22 // main browser process. There is one instance per child process. Messages
     23 // are dispatched on the main renderer thread. The RenderThreadImpl
     24 // creates an instance and delegates calls to it. This classes also manages
     25 // the collection of DOMStorageCachedAreas that are active in the process.
     26 class DomStorageDispatcher {
     27  public:
     28   DomStorageDispatcher();
     29   ~DomStorageDispatcher();
     30 
     31   // Each call to open should be balanced with a call to close.
     32   scoped_refptr<DOMStorageCachedArea> OpenCachedArea(int connection_id,
     33                                                      int64 namespace_id,
     34                                                      const GURL& origin);
     35   void CloseCachedArea(int connection_id, DOMStorageCachedArea* area);
     36 
     37   bool OnMessageReceived(const IPC::Message& msg);
     38 
     39  private:
     40   class ProxyImpl;
     41 
     42   // IPC message handlers
     43   void OnStorageEvent(const DOMStorageMsg_Event_Params& params);
     44   void OnAsyncOperationComplete(bool success);
     45   void OnResetCachedValues(int64 namespace_id);
     46 
     47   scoped_refptr<ProxyImpl> proxy_;
     48 };
     49 
     50 }  // namespace content
     51 
     52 #endif  // CONTENT_RENDERER_DOM_STORAGE_DOM_STORAGE_DISPATCHER_H_
     53