chrome/browser/chromeos/locale_change_guard.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_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/gtest_prod_util.h"
  13 #include "base/lazy_instance.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "base/strings/string16.h"
  17 #include "content/public/browser/notification_observer.h"
  18 #include "content/public/browser/notification_registrar.h"
  19 #include "content/public/browser/notification_types.h"
  20
  21 class Profile;
  22
  23 namespace base {
  24 class ListValue;
  25 }
  26
  27 namespace chromeos {
  28
  29 // Performs check whether locale has been changed automatically recently
  30 // (based on synchronized user preference).  If so: shows notification that
  31 // allows user to revert change.
  32 class LocaleChangeGuard : public content::NotificationObserver,
  33                           public ash::LocaleObserver::Delegate,
  34                           public base::SupportsWeakPtr<LocaleChangeGuard> {
  35  public:
  36   explicit LocaleChangeGuard(Profile* profile);
  37   virtual ~LocaleChangeGuard();
  38
  39   // ash::LocaleChangeDelegate implementation.
  40   virtual void AcceptLocaleChange() override;
  41   virtual void RevertLocaleChange() override;
  42
  43   // Called just before changing locale.
  44   void PrepareChangingLocale(
  45       const std::string& from_locale, const std::string& to_locale);
  46
  47   // Called after login.
  48   void OnLogin();
  49
  50  private:
  51   FRIEND_TEST_ALL_PREFIXES(LocaleChangeGuardTest,
  52                            ShowNotificationLocaleChanged);
  53   FRIEND_TEST_ALL_PREFIXES(LocaleChangeGuardTest,
  54                            ShowNotificationLocaleChangedList);
  55
  56   void RevertLocaleChangeCallback(const base::ListValue* list);
  57   void Check();
  58
  59   // content::NotificationObserver implementation.
  60   virtual void Observe(int type,
  61                        const content::NotificationSource& source,
  62                        const content::NotificationDetails& details) override;
  63
  64   // Returns true if we should notify user about automatic locale change.
  65   static bool ShouldShowLocaleChangeNotification(const std::string& from_locale,
  66                                                  const std::string& to_locale);
  67
  68   static const char* const* GetSkipShowNotificationLanguagesForTesting();
  69   static size_t GetSkipShowNotificationLanguagesSizeForTesting();
  70
  71   std::string from_locale_;
  72   std::string to_locale_;
  73   Profile* profile_;
  74   bool reverted_;
  75   bool session_started_;
  76   bool main_frame_loaded_;
  77   content::NotificationRegistrar registrar_;
  78
  79   // We want to show locale change notification in previous language however
  80   // we cannot directly load strings for non-current locale.  So we cache
  81   // messages before locale change.
  82   base::string16 title_text_;
  83   base::string16 message_text_;
  84   base::string16 revert_link_text_;
  85 };
  86
  87 }  // namespace chromeos
  88
  89 #endif  // CHROME_BROWSER_CHROMEOS_LOCALE_CHANGE_GUARD_H_