extensions/browser/extension_user_script_loader.h

   1 // Copyright 2015 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_USER_SCRIPT_LOADER_H_
   6 #define EXTENSIONS_BROWSER_EXTENSION_USER_SCRIPT_LOADER_H_
   7
   8 #include "base/memory/shared_memory.h"
   9 #include "extensions/browser/extension_registry_observer.h"
  10 #include "extensions/browser/user_script_loader.h"
  11 #include "extensions/common/extension.h"
  12
  13 namespace content {
  14 class BrowserContext;
  15 }
  16
  17 namespace extensions {
  18
  19 class ExtensionRegistry;
  20
  21 // UserScriptLoader for extensions.
  22 class ExtensionUserScriptLoader : public UserScriptLoader,
  23                                   public ExtensionRegistryObserver {
  24  public:
  25   // The listen_for_extension_system_loaded is only set true when initilizing
  26   // the Extension System, e.g, when constructs SharedUserScriptMaster in
  27   // ExtensionSystemImpl.
  28   ExtensionUserScriptLoader(content::BrowserContext* browser_context,
  29                             const HostID& host_id,
  30                             bool listen_for_extension_system_loaded);
  31   ~ExtensionUserScriptLoader() override;
  32
  33  private:
  34   // UserScriptLoader:
  35   void UpdateHostsInfo(const std::set<HostID>& changed_hosts) override;
  36   LoadUserScriptsContentFunction GetLoadUserScriptsFunction() override;
  37
  38   // ExtensionRegistryObserver:
  39   void OnExtensionUnloaded(content::BrowserContext* browser_context,
  40                            const Extension* extension,
  41                            UnloadedExtensionInfo::Reason reason) override;
  42
  43   // Initiates script load when we have been waiting for the extension system
  44   // to be ready.
  45   void OnExtensionSystemReady();
  46
  47   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  48       extension_registry_observer_;
  49
  50   base::WeakPtrFactory<ExtensionUserScriptLoader> weak_factory_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(ExtensionUserScriptLoader);
  53 };
  54
  55 }  // namespace extensions
  56
  57 #endif  // EXTENSIONS_BROWSER_EXTENSION_USER_SCRIPT_LOADER_H_