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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2013 Martin Gräßlin <mgraesslin@kde.org>
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. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "screenlockerwatcher.h"
#include "wayland_server.h"
#include <QFutureWatcher>
#include <QtConcurrentRun>
// dbus generated
#include "screenlocker_interface.h"
namespace KWin
{
KWIN_SINGLETON_FACTORY(ScreenLockerWatcher)
static const QString SCREEN_LOCKER_SERVICE_NAME = QStringLiteral("org.freedesktop.ScreenSaver");
ScreenLockerWatcher::ScreenLockerWatcher(QObject *parent)
: QObject(parent)
, m_interface(NULL)
, m_serviceWatcher(new QDBusServiceWatcher(this))
, m_locked(false)
{
if (waylandServer() && waylandServer()->hasScreenLockerIntegration()) {
connect(waylandServer(), &WaylandServer::initialized, this, &ScreenLockerWatcher::initialize);
} else {
initialize();
}
}
ScreenLockerWatcher::~ScreenLockerWatcher()
{
}
void ScreenLockerWatcher::initialize()
{
connect(m_serviceWatcher, SIGNAL(serviceOwnerChanged(QString,QString,QString)), SLOT(serviceOwnerChanged(QString,QString,QString)));
m_serviceWatcher->setWatchMode(QDBusServiceWatcher::WatchForOwnerChange);
m_serviceWatcher->addWatchedService(SCREEN_LOCKER_SERVICE_NAME);
// check whether service is registered
QFutureWatcher<QDBusReply<bool> > *watcher = new QFutureWatcher<QDBusReply<bool> >(this);
connect(watcher, SIGNAL(finished()), SLOT(serviceRegisteredQueried()));
connect(watcher, SIGNAL(canceled()), watcher, SLOT(deleteLater()));
watcher->setFuture(QtConcurrent::run(QDBusConnection::sessionBus().interface(),
&QDBusConnectionInterface::isServiceRegistered,
SCREEN_LOCKER_SERVICE_NAME));
}
void ScreenLockerWatcher::serviceOwnerChanged(const QString &serviceName, const QString &oldOwner, const QString &newOwner)
{
Q_UNUSED(oldOwner)
if (serviceName != SCREEN_LOCKER_SERVICE_NAME) {
return;
}
delete m_interface;
m_interface = NULL;
m_locked = false;
if (!newOwner.isEmpty()) {
m_interface = new OrgFreedesktopScreenSaverInterface(newOwner, QStringLiteral("/ScreenSaver"), QDBusConnection::sessionBus(), this);
connect(m_interface, SIGNAL(ActiveChanged(bool)), SLOT(setLocked(bool)));
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(m_interface->GetActive(), this);
connect(watcher, SIGNAL(finished(QDBusPendingCallWatcher*)), SLOT(activeQueried(QDBusPendingCallWatcher*)));
}
}
void ScreenLockerWatcher::serviceRegisteredQueried()
{
QFutureWatcher<QDBusReply<bool> > *watcher = dynamic_cast<QFutureWatcher<QDBusReply<bool> > *>(sender());
if (!watcher) {
return;
}
const QDBusReply<bool> &reply = watcher->result();
if (reply.isValid() && reply.value()) {
QFutureWatcher<QDBusReply<QString> > *ownerWatcher = new QFutureWatcher<QDBusReply<QString> >(this);
connect(ownerWatcher, SIGNAL(finished()), SLOT(serviceOwnerQueried()));
connect(ownerWatcher, SIGNAL(canceled()), ownerWatcher, SLOT(deleteLater()));
ownerWatcher->setFuture(QtConcurrent::run(QDBusConnection::sessionBus().interface(),
&QDBusConnectionInterface::serviceOwner,
SCREEN_LOCKER_SERVICE_NAME));
}
watcher->deleteLater();
}
void ScreenLockerWatcher::serviceOwnerQueried()
{
QFutureWatcher<QDBusReply<QString> > *watcher = dynamic_cast<QFutureWatcher<QDBusReply<QString> > *>(sender());
if (!watcher) {
return;
}
const QDBusReply<QString> reply = watcher->result();
if (reply.isValid()) {
serviceOwnerChanged(SCREEN_LOCKER_SERVICE_NAME, QString(), reply.value());
}
watcher->deleteLater();
}
void ScreenLockerWatcher::activeQueried(QDBusPendingCallWatcher *watcher)
{
QDBusPendingReply<bool> reply = *watcher;
if (!reply.isError()) {
setLocked(reply.value());
}
watcher->deleteLater();
}
void ScreenLockerWatcher::setLocked(bool activated)
{
if (m_locked == activated) {
return;
}
m_locked = activated;
emit locked(m_locked);
}
}
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