Home | History | Annotate | Download | only in extensions 
      1 // Copyright (c) 2013 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_RENDERER_STATE_H_
      6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_RENDERER_STATE_H_
      7 
      8 #include <map>
      9 #include <set>
     10 #include <utility>
     11 
     12 #include "base/basictypes.h"
     13 #include "base/memory/singleton.h"
     14 
     15 class WebViewGuest;
     16 
     17 // This class keeps track of renderer state for use on the IO thread. All
     18 // methods should be called on the IO thread except for Init and Shutdown.
     19 class ExtensionRendererState {
     20  public:
     21   struct WebViewInfo {
     22     int embedder_process_id;
     23     int embedder_routing_id;
     24     int instance_id;
     25   };
     26 
     27   static ExtensionRendererState* GetInstance();
     28 
     29   // These are called on the UI thread to start and stop listening to tab
     30   // notifications.
     31   void Init();
     32   void Shutdown();
     33 
     34   // Looks up the information for the embedder <webview> for a given render
     35   // view, if one exists. Called on the IO thread.
     36   bool GetWebViewInfo(int guest_process_id, int guest_routing_id,
     37                       WebViewInfo* webview_info);
     38 
     39   // Looks up the tab and window ID for a given render view. Returns true
     40   // if we have the IDs in our map. Called on the IO thread.
     41   bool GetTabAndWindowId(
     42       int render_process_host_id, int routing_id, int* tab_id, int* window_id);
     43 
     44  private:
     45   class RenderViewHostObserver;
     46   class TabObserver;
     47   friend class TabObserver;
     48   friend class WebViewGuest;
     49   friend struct DefaultSingletonTraits<ExtensionRendererState>;
     50 
     51   typedef std::pair<int, int> RenderId;
     52   typedef std::pair<int, int> TabAndWindowId;
     53   typedef std::map<RenderId, TabAndWindowId> TabAndWindowIdMap;
     54   typedef std::map<RenderId, WebViewInfo> WebViewInfoMap;
     55 
     56   ExtensionRendererState();
     57   ~ExtensionRendererState();
     58 
     59   // Adds or removes a render view from our map.
     60   void SetTabAndWindowId(
     61       int render_process_host_id, int routing_id, int tab_id, int window_id);
     62   void ClearTabAndWindowId(
     63       int render_process_host_id, int routing_id);
     64 
     65   // Adds or removes a <webview> guest render process from the set.
     66   void AddWebView(int render_process_host_id, int routing_id,
     67                   const WebViewInfo& webview_info);
     68   void RemoveWebView(int render_process_host_id, int routing_id);
     69 
     70   TabObserver* observer_;
     71   TabAndWindowIdMap map_;
     72   WebViewInfoMap webview_info_map_;
     73 
     74   DISALLOW_COPY_AND_ASSIGN(ExtensionRendererState);
     75 };
     76 
     77 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_RENDERER_STATE_H_
     78