extensions/browser/guest_view/web_view/web_view_renderer_state.h

   1 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_
   6 #define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <utility>
  11
  12 #include "base/memory/singleton.h"
  13
  14 namespace extensions {
  15
  16 class WebViewGuest;
  17
  18 // This class keeps track of <webview> renderer state for use on the IO thread.
  19 // All methods should be called on the IO thread.
  20 class WebViewRendererState {
  21  public:
  22   struct WebViewInfo {
  23     int embedder_process_id;
  24     int instance_id;
  25     std::string partition_id;
  26     std::string embedder_extension_id;
  27   };
  28
  29   static WebViewRendererState* GetInstance();
  30
  31   // Looks up the information for the embedder <webview> for a given render
  32   // view, if one exists. Called on the IO thread.
  33   bool GetInfo(int guest_process_id, int guest_routing_id,
  34                WebViewInfo* webview_info);
  35
  36   // Looks up the partition info for the embedder <webview> for a given guest
  37   // process. Called on the IO thread.
  38   bool GetPartitionID(int guest_process_id, std::string* partition_id);
  39
  40   // Returns true if the given renderer is used by webviews.
  41   bool IsGuest(int render_process_id);
  42
  43  private:
  44   friend class WebViewGuest;
  45   friend struct DefaultSingletonTraits<WebViewRendererState>;
  46
  47   typedef std::pair<int, int> RenderId;
  48   typedef std::map<RenderId, WebViewInfo> WebViewInfoMap;
  49
  50   struct WebViewPartitionInfo {
  51     int web_view_count;
  52     std::string partition_id;
  53     WebViewPartitionInfo() {}
  54     WebViewPartitionInfo(int count, std::string partition):
  55       web_view_count(count),
  56       partition_id(partition) {}
  57   };
  58
  59   typedef std::map<int, WebViewPartitionInfo> WebViewPartitionIDMap;
  60
  61   WebViewRendererState();
  62   ~WebViewRendererState();
  63
  64   // Adds or removes a <webview> guest render process from the set.
  65   void AddGuest(int render_process_host_id, int routing_id,
  66                 const WebViewInfo& webview_info);
  67   void RemoveGuest(int render_process_host_id, int routing_id);
  68
  69   WebViewInfoMap webview_info_map_;
  70   WebViewPartitionIDMap webview_partition_id_map_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(WebViewRendererState);
  73 };
  74
  75 }  // namespace extensions
  76
  77 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_