151 lines
4.8 KiB
C++
151 lines
4.8 KiB
C++
/*
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Gwenview: an image viewer
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Copyright 2013 Martin Gräßlin <mgraesslin@kde.org>
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Copyright 2018 Friedrich W. H. Kossebau <kossebau@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "lockscreenwatcher.h"
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// lib
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#include <screensaverdbusinterface.h>
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// Qt
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#include <QDBusServiceWatcher>
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#include <QFutureWatcher>
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#include <QtConcurrentRun>
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namespace Gwenview
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{
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using DBusBoolReplyWatcher = QFutureWatcher<QDBusReply<bool>>;
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using DBusStringReplyWatcher = QFutureWatcher<QDBusReply<QString>>;
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inline QString screenSaverServiceName()
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{
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return QStringLiteral("org.freedesktop.ScreenSaver");
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}
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LockScreenWatcher::LockScreenWatcher(QObject *parent)
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: QObject(parent)
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{
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auto screenLockServiceWatcher = new QDBusServiceWatcher(this);
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connect(screenLockServiceWatcher, &QDBusServiceWatcher::serviceOwnerChanged, this, &LockScreenWatcher::onScreenSaverServiceOwnerChanged);
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screenLockServiceWatcher->setWatchMode(QDBusServiceWatcher::WatchForOwnerChange);
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screenLockServiceWatcher->addWatchedService(screenSaverServiceName());
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if (QDBusConnection::sessionBus().interface()) {
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auto watcher = new DBusBoolReplyWatcher(this);
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connect(watcher, &DBusBoolReplyWatcher::finished, this, &LockScreenWatcher::onServiceRegisteredQueried);
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connect(watcher, &DBusBoolReplyWatcher::canceled, watcher, &DBusBoolReplyWatcher::deleteLater);
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watcher->setFuture(
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QtConcurrent::run(&QDBusConnectionInterface::isServiceRegistered, QDBusConnection::sessionBus().interface(), screenSaverServiceName()));
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}
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}
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LockScreenWatcher::~LockScreenWatcher() = default;
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bool LockScreenWatcher::isLocked() const
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{
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return mLocked;
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}
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void LockScreenWatcher::onScreenSaverServiceOwnerChanged(const QString &serviceName, const QString &oldOwner, const QString &newOwner)
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{
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Q_UNUSED(oldOwner)
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if (serviceName != screenSaverServiceName()) {
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return;
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}
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delete mScreenSaverInterface;
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mScreenSaverInterface = nullptr;
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if (!newOwner.isEmpty()) {
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mScreenSaverInterface = new OrgFreedesktopScreenSaverInterface(newOwner, QStringLiteral("/ScreenSaver"), QDBusConnection::sessionBus(), this);
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connect(mScreenSaverInterface, &OrgFreedesktopScreenSaverInterface::ActiveChanged, this, &LockScreenWatcher::onScreenSaverActiveChanged);
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auto watcher = new QDBusPendingCallWatcher(mScreenSaverInterface->GetActive(), this);
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connect(watcher, &QDBusPendingCallWatcher::finished, this, &LockScreenWatcher::onActiveQueried);
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} else {
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if (mLocked) {
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// reset
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mLocked = false;
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Q_EMIT isLockedChanged(mLocked);
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}
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}
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}
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void LockScreenWatcher::onServiceRegisteredQueried()
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{
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auto watcher = dynamic_cast<DBusBoolReplyWatcher *>(sender());
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if (!watcher) {
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return;
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}
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const QDBusReply<bool> &reply = watcher->result();
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if (reply.isValid() && reply.value()) {
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auto ownerWatcher = new DBusStringReplyWatcher(this);
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connect(ownerWatcher, &DBusStringReplyWatcher::finished, this, &LockScreenWatcher::onServiceOwnerQueried);
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connect(ownerWatcher, &DBusStringReplyWatcher::canceled, ownerWatcher, &DBusStringReplyWatcher::deleteLater);
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ownerWatcher->setFuture(
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QtConcurrent::run(&QDBusConnectionInterface::serviceOwner, QDBusConnection::sessionBus().interface(), screenSaverServiceName()));
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}
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watcher->deleteLater();
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}
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void LockScreenWatcher::onServiceOwnerQueried()
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{
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auto watcher = dynamic_cast<DBusStringReplyWatcher *>(sender());
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if (!watcher) {
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return;
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}
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const QDBusReply<QString> reply = watcher->result();
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if (reply.isValid()) {
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onScreenSaverServiceOwnerChanged(screenSaverServiceName(), QString(), reply.value());
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}
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watcher->deleteLater();
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}
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void LockScreenWatcher::onActiveQueried(QDBusPendingCallWatcher *watcher)
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{
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QDBusPendingReply<bool> reply = *watcher;
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if (!reply.isError()) {
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onScreenSaverActiveChanged(reply.value());
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}
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watcher->deleteLater();
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}
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void LockScreenWatcher::onScreenSaverActiveChanged(bool isActive)
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{
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if (mLocked == isActive) {
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return;
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}
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mLocked = isActive;
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Q_EMIT isLockedChanged(mLocked);
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}
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}
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#include "moc_lockscreenwatcher.cpp"
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