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 "extensions/browser/extension_registry_observer.h"
   9 #include "extensions/browser/user_script_loader.h"
  10 #include "extensions/common/extension.h"
  11
  12 namespace content {
  13 class BrowserContext;
  14 }
  15
  16 namespace extensions {
  17
  18 class ContentVerifier;
  19 class ExtensionRegistry;
  20
  21 // UserScriptLoader for extensions.
  22 class ExtensionUserScriptLoader : public UserScriptLoader,
  23                                   public ExtensionRegistryObserver {
  24  public:
  25   using PathAndDefaultLocale = std::pair<base::FilePath, std::string>;
  26   using HostsInfo = std::map<HostID, PathAndDefaultLocale>;
  27
  28   // The listen_for_extension_system_loaded is only set true when initilizing
  29   // the Extension System, e.g, when constructs SharedUserScriptMaster in
  30   // ExtensionSystemImpl.
  31   ExtensionUserScriptLoader(content::BrowserContext* browser_context,
  32                             const HostID& host_id,
  33                             bool listen_for_extension_system_loaded);
  34   ~ExtensionUserScriptLoader() override;
  35
  36   // A wrapper around the method to load user scripts, which is normally run on
  37   // the file thread. Exposed only for tests.
  38   void LoadScriptsForTest(UserScriptList* user_scripts);
  39
  40  private:
  41   // UserScriptLoader:
  42   void LoadScripts(scoped_ptr<UserScriptList> user_scripts,
  43                    const std::set<HostID>& changed_hosts,
  44                    const std::set<int>& added_script_ids,
  45                    LoadScriptsCallback callback) override;
  46
  47   // Updates |hosts_info_| to contain info for each element of
  48   //  |changed_hosts_|.
  49   void UpdateHostsInfo(const std::set<HostID>& changed_hosts);
  50
  51   // ExtensionRegistryObserver:
  52   void OnExtensionUnloaded(content::BrowserContext* browser_context,
  53                            const Extension* extension,
  54                            UnloadedExtensionInfo::Reason reason) override;
  55
  56   // Initiates script load when we have been waiting for the extension system
  57   // to be ready.
  58   void OnExtensionSystemReady();
  59
  60   // Maps host info needed for localization to a host ID.
  61   HostsInfo hosts_info_;
  62
  63   // Manages content verification of the loaded user scripts.
  64   scoped_refptr<ContentVerifier> content_verifier_;
  65
  66   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  67       extension_registry_observer_;
  68
  69   base::WeakPtrFactory<ExtensionUserScriptLoader> weak_factory_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(ExtensionUserScriptLoader);
  72 };
  73
  74 }  // namespace extensions
  75
  76 #endif  // EXTENSIONS_BROWSER_EXTENSION_USER_SCRIPT_LOADER_H_