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 <string>
  11 #include <utility>
  12
  13 #include "base/basictypes.h"
  14 #include "base/memory/singleton.h"
  15
  16 class WebViewGuest;
  17
  18 namespace content {
  19 class ResourceRequestInfo;
  20 }
  21
  22 // This class keeps track of renderer state for use on the IO thread. All
  23 // methods should be called on the IO thread except for Init and Shutdown.
  24 class ExtensionRendererState {
  25  public:
  26   struct WebViewInfo {
  27     int embedder_process_id;
  28     int instance_id;
  29     std::string partition_id;
  30     std::string extension_id;
  31   };
  32
  33   static ExtensionRendererState* GetInstance();
  34
  35   // These are called on the UI thread to start and stop listening to tab
  36   // notifications.
  37   void Init();
  38   void Shutdown();
  39
  40   // Looks up the information for the embedder <webview> for a given render
  41   // view, if one exists. Called on the IO thread.
  42   bool GetWebViewInfo(int guest_process_id, int guest_routing_id,
  43                       WebViewInfo* webview_info);
  44
  45   // Looks up the tab and window ID for a given request. Returns true if we have
  46   // the IDs in our map. Called on the IO thread.
  47   bool GetTabAndWindowId(
  48       const content::ResourceRequestInfo* info, int* tab_id, int* window_id);
  49
  50   // Returns true if the given renderer is used by webviews.
  51   bool IsWebViewRenderer(int render_process_id);
  52
  53  private:
  54   class RenderViewHostObserver;
  55   class TabObserver;
  56   friend class TabObserver;
  57   friend class WebViewGuest;
  58   friend struct DefaultSingletonTraits<ExtensionRendererState>;
  59
  60   typedef std::pair<int, int> RenderId;
  61   typedef std::pair<int, int> TabAndWindowId;
  62   typedef std::map<RenderId, TabAndWindowId> TabAndWindowIdMap;
  63   typedef std::map<RenderId, WebViewInfo> WebViewInfoMap;
  64
  65   ExtensionRendererState();
  66   ~ExtensionRendererState();
  67
  68   // Adds or removes a render view from our map.
  69   void SetTabAndWindowId(
  70       int render_process_host_id, int routing_id, int tab_id, int window_id);
  71   void ClearTabAndWindowId(
  72       int render_process_host_id, int routing_id);
  73
  74   // Adds or removes a <webview> guest render process from the set.
  75   void AddWebView(int render_process_host_id, int routing_id,
  76                   const WebViewInfo& webview_info);
  77   void RemoveWebView(int render_process_host_id, int routing_id);
  78
  79   TabObserver* observer_;
  80   TabAndWindowIdMap map_;
  81   WebViewInfoMap webview_info_map_;
  82
  83   DISALLOW_COPY_AND_ASSIGN(ExtensionRendererState);
  84 };
  85
  86 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_RENDERER_STATE_H_