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_NOTIFICATIONS_LOGIN_STATE_NOTIFICATION_BLOCKER_CHROMEOS_H_ 6 #define CHROME_BROWSER_NOTIFICATIONS_LOGIN_STATE_NOTIFICATION_BLOCKER_CHROMEOS_H_ 7 8 #include "ash/shell_observer.h" 9 #include "chrome/browser/chromeos/login/ui/user_adding_screen.h" 10 #include "chromeos/login/login_state.h" 11 #include "ui/message_center/notification_blocker.h" 12 13 // A notification blocker which checks screen lock / login state for ChromeOS. 14 // This is different from ScreenLockNotificationBlocker because: 15 // - ScreenLockNotificationBlocker only cares about lock status but ChromeOS 16 // needs to care about login-screen. 17 // - ScreenLockNotificationBlocker needs a timer to check the screen lock state 18 // periodically, but ash::ShellObserver gets the events directly in ChromeOS. 19 // - In ChromeOS, some system notifications are allowed to be shown as popups. 20 class LoginStateNotificationBlockerChromeOS 21 : public message_center::NotificationBlocker, 22 public ash::ShellObserver, 23 public chromeos::LoginState::Observer, 24 public chromeos::UserAddingScreen::Observer { 25 public: 26 explicit LoginStateNotificationBlockerChromeOS( 27 message_center::MessageCenter* message_center); 28 virtual ~LoginStateNotificationBlockerChromeOS(); 29 30 private: 31 // message_center::NotificationBlocker overrides: 32 virtual bool ShouldShowNotificationAsPopup( 33 const message_center::NotifierId& notifier_id) const OVERRIDE; 34 35 // ash::ShellObserver overrides: 36 virtual void OnLockStateChanged(bool locked) OVERRIDE; 37 virtual void OnAppTerminating() OVERRIDE; 38 39 // chromeos::LoginState::Observer overrides: 40 virtual void LoggedInStateChanged() OVERRIDE; 41 42 // chromeos::UserAddingScreen::Observer overrides: 43 virtual void OnUserAddingStarted() OVERRIDE; 44 virtual void OnUserAddingFinished() OVERRIDE; 45 46 bool locked_; 47 bool observing_; 48 49 DISALLOW_COPY_AND_ASSIGN(LoginStateNotificationBlockerChromeOS); 50 }; 51 52 #endif // CHROME_BROWSER_NOTIFICATIONS_LOGIN_STATE_NOTIFICATION_BLOCKER_CHROMEOS_H_ 53