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 class Delegate; 51 52 void RevertLocaleChangeCallback(const base::ListValue* list); 53 void Check(); 54 55 // content::NotificationObserver implementation. 56 virtual void Observe(int type, 57 const content::NotificationSource& source, 58 const content::NotificationDetails& details) OVERRIDE; 59 60 std::string from_locale_; 61 std::string to_locale_; 62 Profile* profile_; 63 bool reverted_; 64 bool session_started_; 65 bool main_frame_loaded_; 66 content::NotificationRegistrar registrar_; 67 68 // We want to show locale change notification in previous language however 69 // we cannot directly load strings for non-current locale. So we cache 70 // messages before locale change. 71 base::string16 title_text_; 72 base::string16 message_text_; 73 base::string16 revert_link_text_; 74 }; 75 76 } // namespace chromeos 77 78 #endif // CHROME_BROWSER_CHROMEOS_LOCALE_CHANGE_GUARD_H_ 79