extensions/browser/extension_message_filter.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_EXTENSION_MESSAGE_FILTER_H_
   6 #define EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/macros.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "content/public/browser/browser_message_filter.h"
  15 #include "url/gurl.h"
  16
  17 struct ExtensionHostMsg_Request_Params;
  18
  19 namespace base {
  20 class DictionaryValue;
  21 }
  22
  23 namespace content {
  24 class BrowserContext;
  25 }
  26
  27 namespace extensions {
  28
  29 class InfoMap;
  30
  31 // This class filters out incoming extension-specific IPC messages from the
  32 // renderer process. It is created on the UI thread. Messages may be handled on
  33 // the IO thread or the UI thread.
  34 class ExtensionMessageFilter : public content::BrowserMessageFilter {
  35  public:
  36   ExtensionMessageFilter(int render_process_id,
  37                          content::BrowserContext* context);
  38
  39   int render_process_id() { return render_process_id_; }
  40
  41  private:
  42   friend class content::BrowserThread;
  43   friend class base::DeleteHelper<ExtensionMessageFilter>;
  44
  45   virtual ~ExtensionMessageFilter();
  46
  47   // content::BrowserMessageFilter implementation.
  48   virtual void OverrideThreadForMessage(
  49       const IPC::Message& message,
  50       content::BrowserThread::ID* thread) OVERRIDE;
  51   virtual void OnDestruct() const OVERRIDE;
  52   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  53
  54   // Message handlers on the UI thread.
  55   void OnExtensionAddListener(const std::string& extension_id,
  56                               const GURL& listener_url,
  57                               const std::string& event_name);
  58   void OnExtensionRemoveListener(const std::string& extension_id,
  59                                  const GURL& listener_url,
  60                                  const std::string& event_name);
  61   void OnExtensionAddLazyListener(const std::string& extension_id,
  62                                   const std::string& event_name);
  63   void OnExtensionAttachGuest(int routing_id,
  64                               int element_instance_id,
  65                               int guest_instance_id,
  66                               const base::DictionaryValue& attach_params);
  67   void OnExtensionRemoveLazyListener(const std::string& extension_id,
  68                                      const std::string& event_name);
  69   void OnExtensionAddFilteredListener(const std::string& extension_id,
  70                                       const std::string& event_name,
  71                                       const base::DictionaryValue& filter,
  72                                       bool lazy);
  73   void OnExtensionRemoveFilteredListener(const std::string& extension_id,
  74                                          const std::string& event_name,
  75                                          const base::DictionaryValue& filter,
  76                                          bool lazy);
  77   void OnExtensionShouldSuspendAck(const std::string& extension_id,
  78                                    int sequence_id);
  79   void OnExtensionSuspendAck(const std::string& extension_id);
  80   void OnExtensionTransferBlobsAck(const std::vector<std::string>& blob_uuids);
  81
  82   // Message handlers on the IO thread.
  83   void OnExtensionGenerateUniqueID(int* unique_id);
  84   void OnExtensionResumeRequests(int route_id);
  85   void OnExtensionRequestForIOThread(
  86       int routing_id,
  87       const ExtensionHostMsg_Request_Params& params);
  88
  89   const int render_process_id_;
  90
  91   // Should only be accessed on the UI thread.
  92   content::BrowserContext* browser_context_;
  93
  94   scoped_refptr<extensions::InfoMap> extension_info_map_;
  95
  96   // Weak pointers produced by this factory are bound to the IO thread.
  97   base::WeakPtrFactory<ExtensionMessageFilter> weak_ptr_factory_;
  98
  99   DISALLOW_COPY_AND_ASSIGN(ExtensionMessageFilter);
 100 };
 101
 102 }  // namespace extensions
 103
 104 #endif  // EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_