chromeos/settings/timezone_settings.h

   1 // Copyright 2013 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 CHROMEOS_SETTINGS_TIMEZONE_SETTINGS_H_
   6 #define CHROMEOS_SETTINGS_TIMEZONE_SETTINGS_H_
   7
   8 #include <vector>
   9
  10 #include "base/strings/string16.h"
  11 #include "chromeos/settings/cros_settings_provider.h"
  12 #include "third_party/icu/source/i18n/unicode/timezone.h"
  13
  14 namespace chromeos {
  15 namespace system {
  16
  17 // This interface provides access to Chrome OS timezone settings.
  18 class CHROMEOS_EXPORT TimezoneSettings {
  19  public:
  20   class Observer {
  21    public:
  22     // Called when the timezone has changed. |timezone| is non-null.
  23     virtual void TimezoneChanged(const icu::TimeZone& timezone) = 0;
  24    protected:
  25     virtual ~Observer();
  26   };
  27
  28   static TimezoneSettings* GetInstance();
  29
  30   // Returns the current timezone as an icu::Timezone object.
  31   virtual const icu::TimeZone& GetTimezone() = 0;
  32   virtual base::string16 GetCurrentTimezoneID() = 0;
  33
  34   // Sets the current timezone and notifies all Observers.
  35   virtual void SetTimezone(const icu::TimeZone& timezone) = 0;
  36   virtual void SetTimezoneFromID(const base::string16& timezone_id) = 0;
  37
  38   virtual void AddObserver(Observer* observer) = 0;
  39   virtual void RemoveObserver(Observer* observer) = 0;
  40
  41   virtual const std::vector<icu::TimeZone*>& GetTimezoneList() const = 0;
  42
  43   // Gets timezone ID which is also used as timezone pref value.
  44   static base::string16 GetTimezoneID(const icu::TimeZone& timezone);
  45
  46  protected:
  47   virtual ~TimezoneSettings() {}
  48 };
  49
  50 }  // namespace system
  51 }  // namespace chromeos
  52
  53 #endif  // CHROMEOS_SETTINGS_TIMEZONE_SETTINGS_H_