core_chromeos_options_handler.h revision ddb351dbec246cf1fab5ec20d2d5520909041de1 
1// Copyright (c) 2011 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_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
6#define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
7#pragma once
8
9#include "chrome/browser/ui/webui/options/core_options_handler.h"
10
11namespace chromeos {
12
13// CoreChromeOSOptionsHandler handles ChromeOS settings.
14class CoreChromeOSOptionsHandler : public CoreOptionsHandler {
15 public:
16  CoreChromeOSOptionsHandler();
17
18 protected:
19  // ::CoreOptionsHandler overrides
20  virtual Value* FetchPref(const std::string& pref_name);
21  virtual void ObservePref(const std::string& pref_name);
22  virtual void SetPref(const std::string& pref_name,
23                       const Value* value,
24                       const std::string& metric);
25  virtual void StopObservingPref(const std::string& path);
26
27  // NotificationObserver implementation.
28  virtual void Observe(NotificationType type,
29                       const NotificationSource& source,
30                       const NotificationDetails& details);
31
32 private:
33  // Notifies registered JS callbacks on ChromeOS setting change.
34  void NotifySettingsChanged(const std::string* setting_name);
35
36  // Keeps the track of change caused by the handler to make sure
37  // it does not signal itself again.
38  bool handling_change_;
39};
40
41}  // namespace chromeos
42
43#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
44