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_SYSTEM_SETTINGS_PROVIDER_H_
6#define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_
7
8#include <vector>
9
10#include "base/string16.h"
11#include "chrome/browser/chromeos/cros_settings_provider.h"
12#include "chrome/browser/chromeos/system_access.h"
13#include "third_party/icu/public/i18n/unicode/timezone.h"
14
15class Value;
16class ListValue;
17
18namespace chromeos {
19
20class SystemSettingsProvider : public CrosSettingsProvider,
21                               public SystemAccess::Observer {
22 public:
23  SystemSettingsProvider();
24  virtual ~SystemSettingsProvider();
25
26  // CrosSettingsProvider overrides.
27  virtual bool Get(const std::string& path, Value** out_value) const;
28  virtual bool HandlesSetting(const std::string& path);
29
30  // Overridden from SystemAccess::Observer:
31  virtual void TimezoneChanged(const icu::TimeZone& timezone);
32
33  // Creates the map of timezones used by the options page.
34  ListValue* GetTimezoneList();
35
36 private:
37  // CrosSettingsProvider overrides.
38  virtual void DoSet(const std::string& path, Value* in_value);
39
40  // Gets timezone name.
41  static string16 GetTimezoneName(const icu::TimeZone& timezone);
42
43  // Gets timezone ID which is also used as timezone pref value.
44  static string16 GetTimezoneID(const icu::TimeZone& timezone);
45
46  // Gets timezone object from its id.
47  const icu::TimeZone* GetTimezone(const string16& timezone_id);
48
49  // Gets a timezone id from a timezone in |timezones_| that has the same
50  // rule of given |timezone|.
51  // One timezone could have multiple timezones,
52  // e.g.
53  //   US/Pacific == America/Los_Angeles
54  // We should always use the known timezone id when passing back as
55  // pref values.
56  string16 GetKnownTimezoneID(const icu::TimeZone& timezone) const;
57
58  // Timezones.
59  std::vector<icu::TimeZone*> timezones_;
60
61  DISALLOW_COPY_AND_ASSIGN(SystemSettingsProvider);
62};
63
64}  // namespace chromeos
65
66#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_
67