recommendation_restorer.h revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace
1// Copyright 2013 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_POLICY_RECOMMENDATION_RESTORER_H_ 6#define CHROME_BROWSER_CHROMEOS_POLICY_RECOMMENDATION_RESTORER_H_ 7 8#include <string> 9 10#include "ash/wm/user_activity_observer.h" 11#include "base/basictypes.h" 12#include "base/compiler_specific.h" 13#include "base/prefs/pref_change_registrar.h" 14#include "base/timer/timer.h" 15#include "components/browser_context_keyed_service/browser_context_keyed_service.h" 16#include "content/public/browser/notification_observer.h" 17#include "content/public/browser/notification_registrar.h" 18 19class Profile; 20 21namespace policy { 22 23// Observes a set of prefs in the login profile. If any of the prefs has a 24// recommended value, its user setting is cleared so that the recommendation can 25// take effect. This happens immediately when the login screen is shown, when 26// a session is being started and whenever recommended values change during a 27// user session. On the login screen, user settings are cleared when the user 28// becomes idle for one minute. 29class RecommendationRestorer : public BrowserContextKeyedService, 30 public content::NotificationObserver, 31 public ash::UserActivityObserver { 32 public: 33 explicit RecommendationRestorer(Profile* profile); 34 virtual ~RecommendationRestorer(); 35 36 // BrowserContextKeyedService: 37 virtual void Shutdown() OVERRIDE; 38 39 // content::NotificationObserver: 40 virtual void Observe(int type, 41 const content::NotificationSource& source, 42 const content::NotificationDetails& details) OVERRIDE; 43 44 // ash::UserActivityObserver::Observer: 45 virtual void OnUserActivity() OVERRIDE; 46 47 // If a recommended value and a user setting exist for |pref_name|, clears the 48 // user setting so that the recommended value can take effect. If 49 // |allow_delay| is |true| and the login screen is being shown, a timer is 50 // started that will clear the setting when the user becomes idle for one 51 // minute. Otherwise, the setting is cleared immediately. 52 void Restore(bool allow_delay, const std::string& pref_name); 53 54 private: 55 friend class RecommendationRestorerTest; 56 57 void RestoreAll(); 58 59 void StartTimer(); 60 void StopTimer(); 61 62 PrefChangeRegistrar pref_change_registrar_; 63 content::NotificationRegistrar notification_registrar_; 64 65 bool logged_in_; 66 67 base::OneShotTimer<RecommendationRestorer> restore_timer_; 68 69 DISALLOW_COPY_AND_ASSIGN(RecommendationRestorer); 70}; 71 72} // namespace policy 73 74#endif // CHROME_BROWSER_CHROMEOS_POLICY_RECOMMENDATION_RESTORER_H_ 75