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_LOCALE_CHANGE_GUARD_H_ 6 #define CHROME_BROWSER_CHROMEOS_LOCALE_CHANGE_GUARD_H_ 7 8 #include <string> 9 10 #include "ash/system/locale/locale_observer.h" 11 #include "base/compiler_specific.h" 12 #include "base/lazy_instance.h" 13 #include "base/memory/scoped_ptr.h" 14 #include "base/memory/weak_ptr.h" 15 #include "base/strings/string16.h" 16 #include "content/public/browser/notification_observer.h" 17 #include "content/public/browser/notification_registrar.h" 18 #include "content/public/browser/notification_types.h" 19 20 class Profile; 21 22 namespace base { 23 class ListValue; 24 } 25 26 namespace chromeos { 27 28 // Performs check whether locale has been changed automatically recently 29 // (based on synchronized user preference). If so: shows notification that 30 // allows user to revert change. 31 class LocaleChangeGuard : public content::NotificationObserver, 32 public ash::LocaleObserver::Delegate, 33 public base::SupportsWeakPtr<LocaleChangeGuard> { 34 public: 35 explicit LocaleChangeGuard(Profile* profile); 36 virtual ~LocaleChangeGuard(); 37 38 // ash::LocaleChangeDelegate implementation. 39 virtual void AcceptLocaleChange() OVERRIDE; 40 virtual void RevertLocaleChange() OVERRIDE; 41 42 // Called just before changing locale. 43 void PrepareChangingLocale( 44 const std::string& from_locale, const std::string& to_locale); 45 46 // Called after login. 47 void OnLogin(); 48 49 private: 50 void RevertLocaleChangeCallback(const base::ListValue* list); 51 void Check(); 52 53 // content::NotificationObserver implementation. 54 virtual void Observe(int type, 55 const content::NotificationSource& source, 56 const content::NotificationDetails& details) OVERRIDE; 57 58 std::string from_locale_; 59 std::string to_locale_; 60 Profile* profile_; 61 bool reverted_; 62 bool session_started_; 63 bool main_frame_loaded_; 64 content::NotificationRegistrar registrar_; 65 66 // We want to show locale change notification in previous language however 67 // we cannot directly load strings for non-current locale. So we cache 68 // messages before locale change. 69 base::string16 title_text_; 70 base::string16 message_text_; 71 base::string16 revert_link_text_; 72 }; 73 74 } // namespace chromeos 75 76 #endif // CHROME_BROWSER_CHROMEOS_LOCALE_CHANGE_GUARD_H_ 77