chrome/browser/chromeos/system_settings_provider.h

   1 // Copyright (c) 2012 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_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_
   6 #define CHROME_BROWSER_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/callback.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/string16.h"
  14 #include "chrome/browser/chromeos/cros_settings_provider.h"
  15 #include "chrome/browser/chromeos/system/timezone_settings.h"
  16 #include "third_party/icu/public/i18n/unicode/timezone.h"
  17
  18 namespace base {
  19 class ListValue;
  20 class Value;
  21 }
  22
  23 namespace chromeos {
  24
  25 class SystemSettingsProvider : public CrosSettingsProvider,
  26                                public system::TimezoneSettings::Observer {
  27  public:
  28   explicit SystemSettingsProvider(const NotifyObserversCallback& notify_cb);
  29   virtual ~SystemSettingsProvider();
  30
  31   // CrosSettingsProvider implementation.
  32   virtual const base::Value* Get(const std::string& path) const OVERRIDE;
  33   virtual TrustedStatus PrepareTrustedValues(
  34       const base::Closure& callback) OVERRIDE;
  35   virtual bool HandlesSetting(const std::string& path) const OVERRIDE;
  36   virtual void Reload() OVERRIDE;
  37
  38   // TimezoneSettings::Observer implementation.
  39   virtual void TimezoneChanged(const icu::TimeZone& timezone) OVERRIDE;
  40
  41   // Creates the map of timezones used by the options page.
  42   base::ListValue* GetTimezoneList();
  43
  44  private:
  45   // CrosSettingsProvider implementation.
  46   virtual void DoSet(const std::string& path,
  47                      const base::Value& in_value) OVERRIDE;
  48
  49   // Gets timezone name.
  50   static string16 GetTimezoneName(const icu::TimeZone& timezone);
  51
  52   // Gets timezone ID which is also used as timezone pref value.
  53   static string16 GetTimezoneID(const icu::TimeZone& timezone);
  54
  55   // Gets timezone object from its id.
  56   const icu::TimeZone* GetTimezone(const string16& timezone_id);
  57
  58   // Gets a timezone id from a timezone in |timezones_| that has the same
  59   // rule of given |timezone|.
  60   // One timezone could have multiple timezones,
  61   // e.g.
  62   //   US/Pacific == America/Los_Angeles
  63   // We should always use the known timezone id when passing back as
  64   // pref values.
  65   string16 GetKnownTimezoneID(const icu::TimeZone& timezone) const;
  66
  67   // Timezones.
  68   std::vector<icu::TimeZone*> timezones_;
  69
  70   scoped_ptr<base::Value> timezone_value_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(SystemSettingsProvider);
  73 };
  74
  75 }  // namespace chromeos
  76
  77 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_SETTINGS_PROVIDER_H_