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/*
* ScreenLockFeaturePlugin.cpp - implementation of ScreenLockFeaturePlugin class
*
* Copyright (c) 2017-2025 Tobias Junghans <tobydox@veyon.io>
*
* This file is part of Veyon - https://veyon.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include <QCoreApplication>
#include "ScreenLockFeaturePlugin.h"
#include "FeatureWorkerManager.h"
#include "LockWidget.h"
#include "PlatformCoreFunctions.h"
#include "PlatformSessionFunctions.h"
#include "VeyonServerInterface.h"
ScreenLockFeaturePlugin::ScreenLockFeaturePlugin( QObject* parent ) :
QObject( parent ),
m_screenLockFeature( QStringLiteral( "ScreenLock" ),
Feature::Flag::Mode | Feature::Flag::AllComponents,
Feature::Uid( "ccb535a2-1d24-4cc1-a709-8b47d2b2ac79" ),
Feature::Uid(),
tr( "Lock" ), tr( "Unlock" ),
tr( "To reclaim all user's full attention you can lock "
"their computers using this button. "
"In this mode all input devices are locked and "
"the screens are blacked." ),
QStringLiteral(":/screenlock/system-lock-screen.png") ),
m_lockInputDevicesFeature( QStringLiteral( "InputDevicesLock" ),
Feature::Flag::Mode | Feature::Flag::AllComponents | Feature::Flag::Meta,
Feature::Uid( "e4a77879-e544-4fec-bc18-e534f33b934c" ),
{},
tr( "Lock input devices" ), tr( "Unlock input devices" ),
tr( "To reclaim all user's full attention you can lock "
"their computers using this button. "
"In this mode all input devices are locked while the desktop is still visible." ),
QStringLiteral(":/screenlock/system-lock-screen.png") ),
m_features( { m_screenLockFeature, m_lockInputDevicesFeature } ),
m_lockWidget( nullptr )
{
}
ScreenLockFeaturePlugin::~ScreenLockFeaturePlugin()
{
delete m_lockWidget;
}
bool ScreenLockFeaturePlugin::controlFeature( Feature::Uid featureUid, Operation operation,
const QVariantMap& arguments,
const ComputerControlInterfaceList& computerControlInterfaces )
{
Q_UNUSED(arguments)
if( hasFeature( featureUid ) == false )
{
return false;
}
if( operation == Operation::Start )
{
sendFeatureMessage( FeatureMessage{ featureUid, StartLockCommand }, computerControlInterfaces );
return true;
}
if( operation == Operation::Stop )
{
sendFeatureMessage( FeatureMessage{ featureUid, StopLockCommand }, computerControlInterfaces );
return true;
}
return false;
}
bool ScreenLockFeaturePlugin::handleFeatureMessage( VeyonServerInterface& server,
const MessageContext& messageContext,
const FeatureMessage& message )
{
Q_UNUSED(messageContext)
if( message.featureUid() == m_screenLockFeature.uid() ||
message.featureUid() == m_lockInputDevicesFeature.uid() )
{
if( server.featureWorkerManager().isWorkerRunning( message.featureUid() ) == false &&
message.command() == StopLockCommand )
{
return true;
}
if( VeyonCore::platform().sessionFunctions().currentSessionHasUser() == false )
{
vDebug() << "not locking screen since not running in a user session";
return true;
}
// forward message to worker
server.featureWorkerManager().sendMessageToManagedSystemWorker( message );
return true;
}
return false;
}
bool ScreenLockFeaturePlugin::handleFeatureMessage( VeyonWorkerInterface& worker, const FeatureMessage& message )
{
Q_UNUSED(worker);
if( message.featureUid() == m_screenLockFeature.uid() ||
message.featureUid() == m_lockInputDevicesFeature.uid() )
{
switch( message.command() )
{
case StartLockCommand:
if( m_lockWidget == nullptr )
{
VeyonCore::platform().coreFunctions().disableScreenSaver();
auto mode = LockWidget::BackgroundPixmap;
if( message.featureUid() == m_lockInputDevicesFeature.uid() )
{
mode = LockWidget::DesktopVisible;
}
m_lockWidget = new LockWidget( mode,
QPixmap( QStringLiteral(":/screenlock/locked-screen-background.png" ) ) );
}
return true;
case StopLockCommand:
delete m_lockWidget;
m_lockWidget = nullptr;
VeyonCore::platform().coreFunctions().restoreScreenSaverSettings();
QCoreApplication::quit();
return true;
default:
break;
}
}
return false;
}
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