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_SCREEN_LOCK_NOTIFICATION_BLOCKER_H_
6#define CHROME_BROWSER_NOTIFICATIONS_SCREEN_LOCK_NOTIFICATION_BLOCKER_H_
7
8#include "base/basictypes.h"
9#include "base/observer_list.h"
10#include "base/timer/timer.h"
11#include "ui/message_center/notification_blocker.h"
12
13// A notification blocker which checks the screen lock state constantly.
14class ScreenLockNotificationBlocker
15    : public message_center::NotificationBlocker {
16 public:
17  explicit ScreenLockNotificationBlocker(
18      message_center::MessageCenter* message_center);
19  virtual ~ScreenLockNotificationBlocker();
20
21  bool is_locked() const { return is_locked_; }
22
23  // message_center::NotificationBlocker overrides:
24  virtual void CheckState() OVERRIDE;
25  virtual bool ShouldShowNotificationAsPopup(
26      const message_center::NotifierId& notifier_id) const OVERRIDE;
27
28 private:
29  bool is_locked_;
30
31  base::OneShotTimer<ScreenLockNotificationBlocker> timer_;
32
33  DISALLOW_COPY_AND_ASSIGN(ScreenLockNotificationBlocker);
34};
35
36#endif  // CHROME_BROWSER_NOTIFICATIONS_SCREEN_LOCK_NOTIFICATION_BLOCKER_H_
37