blob: 81b1e7c867c6f9f75ae307d63676cec340590a81 [file] [log] [blame]
// 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.
#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( Keep studying for a solid way to do this on Linux.
class CONTENT_EXPORT ScreenlockMonitor {
ScreenlockMonitor(std::unique_ptr<ScreenlockMonitorSource> source);
// 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);
friend class ScreenlockMonitorSource;
void NotifyScreenLocked();
void NotifyScreenUnlocked();
scoped_refptr<base::ObserverListThreadSafe<ScreenlockObserver>> observers_;
std::unique_ptr<ScreenlockMonitorSource> source_;
} // namespace content