chrome/browser/notifications/login_state_notification_blocker_chromeos.h

   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/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_