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// Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_CROS_SCREEN_LOCK_LIBRARY_H_
#define CHROME_BROWSER_CHROMEOS_CROS_SCREEN_LOCK_LIBRARY_H_
#include "base/observer_list.h"
#include "cros/chromeos_screen_lock.h"
namespace chromeos {
// This interface defines interaction with the ChromeOS screen lock
// APIs.
class ScreenLockLibrary {
public:
class Observer {
public:
virtual ~Observer() {}
virtual void LockScreen(ScreenLockLibrary* obj) = 0;
virtual void UnlockScreen(ScreenLockLibrary* obj) = 0;
virtual void UnlockScreenFailed(ScreenLockLibrary* obj) = 0;
};
ScreenLockLibrary() {}
virtual ~ScreenLockLibrary() {}
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
// Notifies PowerManager that screen lock has been completed.
virtual void NotifyScreenLockCompleted() = 0;
// Notifies PowerManager that a user requested to lock the screen.
virtual void NotifyScreenLockRequested() = 0;
// Notifies PowerManager that a user unlocked the screen.
virtual void NotifyScreenUnlockRequested() = 0;
// Notifies PowerManager that screen is unlocked.
virtual void NotifyScreenUnlockCompleted() = 0;
};
// This class handles the interaction with the ChromeOS screen lock APIs.
class ScreenLockLibraryImpl : public ScreenLockLibrary {
public:
ScreenLockLibraryImpl();
virtual ~ScreenLockLibraryImpl();
// ScreenLockLibrary implementations:
virtual void AddObserver(Observer* observer);
virtual void RemoveObserver(Observer* observer);
virtual void NotifyScreenLockRequested();
virtual void NotifyScreenLockCompleted();
virtual void NotifyScreenUnlockRequested();
virtual void NotifyScreenUnlockCompleted();
private:
// This method is called when PowerManager requests to lock the screen.
// This method is called on a background thread.
static void ScreenLockedHandler(void* object, ScreenLockEvent event);
// This methods starts the monitoring of screen lock request.
void Init();
// Called by the handler to notify the screen lock request from
// SessionManager.
void LockScreen();
// Called by the handler to notify the screen unlock request from
// SessionManager.
void UnlockScreen();
// Called by the handler to notify the screen unlock request has been
// failed.
void UnlockScreenFailed();
ObserverList<Observer> observers_;
// A reference to the screen lock api
chromeos::ScreenLockConnection screen_lock_connection_;
DISALLOW_COPY_AND_ASSIGN(ScreenLockLibraryImpl);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_CROS_SCREEN_LOCK_LIBRARY_H_
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