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      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_
     78