chrome/browser/extensions/declarative_user_script_master.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 CHROME_BROWSER_EXTENSIONS_DECLARATIVE_USER_SCRIPT_MASTER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_DECLARATIVE_USER_SCRIPT_MASTER_H_
   7
   8 #include "base/scoped_observer.h"
   9 #include "chrome/browser/extensions/user_script_loader.h"
  10 #include "extensions/browser/extension_registry_observer.h"
  11 #include "extensions/common/extension.h"
  12
  13 class Profile;
  14
  15 namespace extensions {
  16
  17 class ExtensionRegistry;
  18 class UserScript;
  19
  20 // Manages declarative user scripts for a single extension. Owns a
  21 // UserScriptLoader to which file loading and shared memory management
  22 // operations are delegated, and provides an interface for adding, removing,
  23 // and clearing scripts.
  24 class DeclarativeUserScriptMaster : public ExtensionRegistryObserver {
  25  public:
  26   DeclarativeUserScriptMaster(Profile* profile,
  27                               const ExtensionId& extension_id);
  28   ~DeclarativeUserScriptMaster() override;
  29
  30   // Adds script to shared memory region. This may not happen right away if a
  31   // script load is in progress.
  32   void AddScript(const UserScript& script);
  33
  34   // Removes script from shared memory region. This may not happen right away if
  35   // a script load is in progress.
  36   void RemoveScript(const UserScript& script);
  37
  38   // Removes all scripts from shared memory region. This may not happen right
  39   // away if a script load is in progress.
  40   void ClearScripts();
  41
  42   const ExtensionId& extension_id() const { return extension_id_; }
  43
  44  private:
  45   // ExtensionRegistryObserver implementation.
  46   void OnExtensionUnloaded(content::BrowserContext* browser_context,
  47                            const Extension* extension,
  48                            UnloadedExtensionInfo::Reason reason) override;
  49
  50   // ID of extension that owns scripts that this component manages.
  51   ExtensionId extension_id_;
  52
  53   // Script loader that handles loading contents of scripts into shared memory
  54   // and notifying renderers of script updates.
  55   UserScriptLoader loader_;
  56
  57   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  58       extension_registry_observer_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(DeclarativeUserScriptMaster);
  61 };
  62
  63 }  // namespace extensions
  64
  65 #endif  // CHROME_BROWSER_EXTENSIONS_DECLARATIVE_USER_SCRIPT_MASTER_H_