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 "components/keyed_service/core/keyed_service_shutdown_notifier.h"
  15 #include "content/public/browser/browser_message_filter.h"
  16
  17 class GURL;
  18
  19 namespace content {
  20 class BrowserContext;
  21 }
  22
  23 namespace gfx {
  24 class Size;
  25 }
  26
  27 namespace extensions {
  28
  29 class ExtensionSystem;
  30 class ProcessManager;
  31
  32 // This class filters out incoming extension-specific IPC messages from the
  33 // renderer process. It is created and destroyed on the UI thread and handles
  34 // messages there.
  35 class ExtensionMessageFilter : public content::BrowserMessageFilter {
  36  public:
  37   ExtensionMessageFilter(int render_process_id,
  38                          content::BrowserContext* context);
  39
  40   int render_process_id() { return render_process_id_; }
  41
  42   static void EnsureShutdownNotifierFactoryBuilt();
  43
  44  private:
  45   friend class base::DeleteHelper<ExtensionMessageFilter>;
  46   friend class content::BrowserThread;
  47
  48   ~ExtensionMessageFilter() override;
  49
  50   void ShutdownOnUIThread();
  51
  52   // content::BrowserMessageFilter implementation.
  53   void OverrideThreadForMessage(const IPC::Message& message,
  54                                 content::BrowserThread::ID* thread) override;
  55   void OnDestruct() const override;
  56   bool OnMessageReceived(const IPC::Message& message) override;
  57
  58   // Message handlers on the UI thread.
  59   void OnExtensionAddListener(const std::string& extension_id,
  60                               const GURL& listener_url,
  61                               const std::string& event_name);
  62   void OnExtensionRemoveListener(const std::string& extension_id,
  63                                  const GURL& listener_url,
  64                                  const std::string& event_name);
  65   void OnExtensionAddLazyListener(const std::string& extension_id,
  66                                   const std::string& event_name);
  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   const int render_process_id_;
  83
  84   scoped_ptr<KeyedServiceShutdownNotifier::Subscription> shutdown_notifier_;
  85
  86   // Owned by the browser context; should only be accessed on the UI thread.
  87   ExtensionSystem* extension_system_;
  88   ProcessManager* process_manager_;
  89
  90   DISALLOW_COPY_AND_ASSIGN(ExtensionMessageFilter);
  91 };
  92
  93 }  // namespace extensions
  94
  95 #endif  // EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_