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// Copyright 2018 The Chromium Authors
// 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_DEVICE_SOURCE_H_
#define CONTENT_BROWSER_SCREENLOCK_MONITOR_SCREENLOCK_MONITOR_DEVICE_SOURCE_H_
#include <memory>
#include "build/build_config.h"
#include "content/browser/screenlock_monitor/screenlock_monitor_source.h"
#include "content/common/content_export.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include <wtsapi32.h>
#endif // BUILDFLAG(IS_WIN)
#if BUILDFLAG(IS_CHROMEOS)
#include <optional>
#include "components/session_manager/core/session_manager_observer.h"
#endif // BUILDFLAG(IS_CHROMEOS)
#if BUILDFLAG(IS_WIN)
namespace gfx {
class SingletonHwndObserver;
} // namespace gfx
#endif // BUILDFLAG(IS_WIN)
namespace content {
// A class used to monitor the screenlock state change on each supported
// platform and notify the change event to monitor.
class CONTENT_EXPORT ScreenlockMonitorDeviceSource
: public ScreenlockMonitorSource {
public:
ScreenlockMonitorDeviceSource();
ScreenlockMonitorDeviceSource(const ScreenlockMonitorDeviceSource&) = delete;
ScreenlockMonitorDeviceSource& operator=(
const ScreenlockMonitorDeviceSource&) = delete;
~ScreenlockMonitorDeviceSource() override;
#if BUILDFLAG(IS_WIN)
// Fake session notification registration/unregistration APIs allow us to test
// receiving and handling messages that look as if they are sent by other
// sessions, without having to create a session host and a second session.
using WTSRegisterSessionNotificationFunction = bool (*)(HWND hwnd,
DWORD flags);
using WTSUnRegisterSessionNotificationFunction = bool (*)(HWND hwnd);
static void SetFakeNotificationAPIsForTesting(
WTSRegisterSessionNotificationFunction register_function,
WTSUnRegisterSessionNotificationFunction unregister_function);
#endif // BUILDFLAG(IS_WIN)
private:
#if BUILDFLAG(IS_WIN)
// Represents a singleton hwnd for screenlock message handling on Win.
// Only allow ScreenlockMonitor to create it.
class SessionMessageWindow {
public:
SessionMessageWindow();
SessionMessageWindow(const SessionMessageWindow&) = delete;
SessionMessageWindow& operator=(const SessionMessageWindow&) = delete;
~SessionMessageWindow();
static void SetFakeNotificationAPIsForTesting(
WTSRegisterSessionNotificationFunction register_function,
WTSUnRegisterSessionNotificationFunction unregister_function);
private:
void OnWndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
void ProcessWTSSessionLockMessage(WPARAM event_id);
static WTSRegisterSessionNotificationFunction
register_session_notification_function_;
static WTSUnRegisterSessionNotificationFunction
unregister_session_notification_function_;
std::unique_ptr<gfx::SingletonHwndObserver> singleton_hwnd_observer_;
};
SessionMessageWindow session_message_window_;
#endif // BUILDFLAG(IS_WIN)
#if BUILDFLAG(IS_MAC)
void StartListeningForScreenlock();
void StopListeningForScreenlock();
#endif // BUILDFLAG(IS_MAC)
#if BUILDFLAG(IS_CHROMEOS)
class ScreenLockListener : public session_manager::SessionManagerObserver {
public:
ScreenLockListener();
ScreenLockListener(const ScreenLockListener&) = delete;
ScreenLockListener& operator=(const ScreenLockListener&) = delete;
~ScreenLockListener() override;
// session_manager::SessionManagerObserver:
void OnSessionStateChanged() override;
private:
std::optional<ScreenlockEvent> prev_event_;
};
ScreenLockListener screenlock_listener_;
#endif // BUILDFLAG(IS_CHROMEOS)
};
} // namespace content
#endif // CONTENT_BROWSER_SCREENLOCK_MONITOR_SCREENLOCK_MONITOR_DEVICE_SOURCE_H_
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