extensions/browser/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 EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MASTER_H_
   6 #define EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MASTER_H_
   7
   8 #include "base/scoped_observer.h"
   9 #include "extensions/browser/extension_user_script_loader.h"
  10
  11 namespace content {
  12 class BrowserContext;
  13 }
  14
  15 namespace extensions {
  16
  17 class UserScript;
  18
  19 // Manages declarative user scripts for a single extension. Owns a
  20 // UserScriptLoader to which file loading and shared memory management
  21 // operations are delegated, and provides an interface for adding, removing,
  22 // and clearing scripts.
  23 class DeclarativeUserScriptMaster {
  24  public:
  25   DeclarativeUserScriptMaster(content::BrowserContext* browser_context,
  26                               const HostID& host_id);
  27   ~DeclarativeUserScriptMaster();
  28
  29   // Adds script to shared memory region. This may not happen right away if a
  30   // script load is in progress.
  31   void AddScript(const UserScript& script);
  32
  33   // Removes script from shared memory region. This may not happen right away if
  34   // a script load is in progress.
  35   void RemoveScript(const UserScript& script);
  36
  37   // Removes all scripts from shared memory region. This may not happen right
  38   // away if a script load is in progress.
  39   void ClearScripts();
  40
  41   const HostID& host_id() const { return host_id_; }
  42
  43  private:
  44   // ID of host that owns scripts that this component manages.
  45   HostID host_id_;
  46
  47   // Script loader that handles loading contents of scripts into shared memory
  48   // and notifying renderers of script updates.
  49   ExtensionUserScriptLoader loader_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(DeclarativeUserScriptMaster);
  52 };
  53
  54 }  // namespace extensions
  55
  56 #endif  // EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MASTER_H_