chrome/browser/extensions/extension_renderer_state.h

   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_