| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_BROWSER_SCREENLOCK_MONITOR_SCREENLOCK_MONITOR_H_ |
| #define CONTENT_BROWSER_SCREENLOCK_MONITOR_SCREENLOCK_MONITOR_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/observer_list_threadsafe.h" |
| #include "content/common/content_export.h" |
| #include "content/public/browser/screenlock_observer.h" |
| |
| namespace content { |
| |
| class ScreenlockMonitorSource; |
| |
| // A class used to monitor the screenlock state change and notify the observers |
| // about the change event. |
| // Currently available on Win/MacOSX/ChromOS only. |
| // TODO(crbug.com/887585): Keep studying for a solid way to do this on Linux. |
| class CONTENT_EXPORT ScreenlockMonitor { |
| public: |
| ScreenlockMonitor(std::unique_ptr<ScreenlockMonitorSource> source); |
| ~ScreenlockMonitor(); |
| |
| // Get the process-wide ScreenlockMonitor (if not present, returns NULL). |
| static ScreenlockMonitor* Get(); |
| |
| // Add and remove an observer. |
| // Can be called from any thread. |observer| is notified on the sequence |
| // from which it was registered. |
| // Must not be called from within a notification callback. |
| void AddObserver(ScreenlockObserver* observer); |
| void RemoveObserver(ScreenlockObserver* observer); |
| |
| private: |
| friend class ScreenlockMonitorSource; |
| |
| void NotifyScreenLocked(); |
| void NotifyScreenUnlocked(); |
| |
| scoped_refptr<base::ObserverListThreadSafe<ScreenlockObserver>> observers_; |
| std::unique_ptr<ScreenlockMonitorSource> source_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScreenlockMonitor); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_SCREENLOCK_MONITOR_SCREENLOCK_MONITOR_H_ |