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 #include "chrome/browser/chromeos/settings/system_settings_provider.h" 6 7 #include "base/strings/string16.h" 8 #include "base/time/time.h" 9 #include "base/values.h" 10 #include "chrome/browser/chromeos/login/user_manager.h" 11 #include "chrome/browser/chromeos/settings/cros_settings.h" 12 #include "chrome/browser/chromeos/settings/cros_settings_names.h" 13 #include "grit/generated_resources.h" 14 #include "ui/base/l10n/l10n_util.h" 15 16 namespace chromeos { 17 18 SystemSettingsProvider::SystemSettingsProvider( 19 const NotifyObserversCallback& notify_cb) 20 : CrosSettingsProvider(notify_cb) { 21 system::TimezoneSettings *timezone_settings = 22 system::TimezoneSettings::GetInstance(); 23 timezone_settings->AddObserver(this); 24 timezone_value_.reset(new base::StringValue( 25 timezone_settings->GetCurrentTimezoneID())); 26 } 27 28 SystemSettingsProvider::~SystemSettingsProvider() { 29 system::TimezoneSettings::GetInstance()->RemoveObserver(this); 30 } 31 32 void SystemSettingsProvider::DoSet(const std::string& path, 33 const base::Value& in_value) { 34 // Non-guest users can change the time zone. 35 if (UserManager::Get()->IsLoggedInAsGuest()) 36 return; 37 38 if (path == kSystemTimezone) { 39 string16 timezone_id; 40 if (!in_value.GetAsString(&timezone_id)) 41 return; 42 // This will call TimezoneChanged. 43 system::TimezoneSettings::GetInstance()->SetTimezoneFromID(timezone_id); 44 } 45 } 46 47 const base::Value* SystemSettingsProvider::Get(const std::string& path) const { 48 if (path == kSystemTimezone) 49 return timezone_value_.get(); 50 return NULL; 51 } 52 53 // The timezone is always trusted. 54 CrosSettingsProvider::TrustedStatus 55 SystemSettingsProvider::PrepareTrustedValues(const base::Closure& cb) { 56 return TRUSTED; 57 } 58 59 bool SystemSettingsProvider::HandlesSetting(const std::string& path) const { 60 return path == kSystemTimezone; 61 } 62 63 void SystemSettingsProvider::TimezoneChanged(const icu::TimeZone& timezone) { 64 // Fires system setting change notification. 65 timezone_value_.reset(new base::StringValue( 66 system::TimezoneSettings::GetTimezoneID(timezone))); 67 NotifyObservers(kSystemTimezone); 68 } 69 70 } // namespace chromeos 71