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     int rules_registry_id;
  26     std::string partition_id;
  27     std::string owner_extension_id;
  28   };
  29
  30   static WebViewRendererState* GetInstance();
  31
  32   // Looks up the information for the embedder <webview> for a given render
  33   // view, if one exists. Called on the IO thread.
  34   bool GetInfo(int guest_process_id, int guest_routing_id,
  35                WebViewInfo* webview_info);
  36
  37   // Looks up the information for the owner for a given guest process in a
  38   // <webview>. Called on the IO thread.
  39   bool GetOwnerInfo(int guest_process_id,
  40                     int* owner_process_id,
  41                     std::string* owner_extension_id) const;
  42
  43   // Looks up the partition info for the embedder <webview> for a given guest
  44   // process. Called on the IO thread.
  45   bool GetPartitionID(int guest_process_id, std::string* partition_id);
  46
  47   // Returns true if the given renderer is used by webviews.
  48   bool IsGuest(int render_process_id);
  49
  50  private:
  51   friend class WebViewGuest;
  52   friend struct DefaultSingletonTraits<WebViewRendererState>;
  53
  54   typedef std::pair<int, int> RenderId;
  55   typedef std::map<RenderId, WebViewInfo> WebViewInfoMap;
  56
  57   struct WebViewPartitionInfo {
  58     int web_view_count;
  59     std::string partition_id;
  60     WebViewPartitionInfo() {}
  61     WebViewPartitionInfo(int count, std::string partition):
  62       web_view_count(count),
  63       partition_id(partition) {}
  64   };
  65
  66   typedef std::map<int, WebViewPartitionInfo> WebViewPartitionIDMap;
  67
  68   WebViewRendererState();
  69   ~WebViewRendererState();
  70
  71   // Adds or removes a <webview> guest render process from the set.
  72   void AddGuest(int render_process_host_id, int routing_id,
  73                 const WebViewInfo& webview_info);
  74   void RemoveGuest(int render_process_host_id, int routing_id);
  75
  76   WebViewInfoMap webview_info_map_;
  77   WebViewPartitionIDMap webview_partition_id_map_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(WebViewRendererState);
  80 };
  81
  82 }  // namespace extensions
  83
  84 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_RENDERER_STATE_H_