chrome/browser/chromeos/locale_change_guard.h

   1 // Copyright (c) 2011 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 #pragma once
   8
   9 #include <string>
  10
  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 "chrome/browser/chromeos/notifications/system_notification.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 base::SupportsWeakPtr<LocaleChangeGuard> {
  33  public:
  34   explicit LocaleChangeGuard(Profile* profile);
  35   virtual ~LocaleChangeGuard();
  36
  37   // Called just before changing locale.
  38   void PrepareChangingLocale(
  39       const std::string& from_locale, const std::string& to_locale);
  40
  41   // Called after login.
  42   void OnLogin();
  43
  44  private:
  45   class Delegate;
  46
  47   void RevertLocaleChange(const base::ListValue* list);
  48   void AcceptLocaleChange();
  49   void Check();
  50
  51   // content::NotificationObserver implementation.
  52   virtual void Observe(int type,
  53                        const content::NotificationSource& source,
  54                        const content::NotificationDetails& details) OVERRIDE;
  55
  56   std::string from_locale_;
  57   std::string to_locale_;
  58   Profile* profile_;
  59   scoped_ptr<chromeos::SystemNotification> note_;
  60   bool reverted_;
  61   content::NotificationRegistrar registrar_;
  62
  63   // We want to show locale change notification in previous language however
  64   // we cannot directly load strings for non-current locale.  So we cache
  65   // messages before locale change.
  66   string16 title_text_;
  67   string16 message_text_;
  68   string16 revert_link_text_;
  69 };
  70
  71 }  // namespace chromeos
  72
  73 #endif  // CHROME_BROWSER_CHROMEOS_LOCALE_CHANGE_GUARD_H_