/* Gwenview: an image viewer Copyright 2013 Martin Gräßlin Copyright 2018 Friedrich W. H. Kossebau 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "lockscreenwatcher.h" // lib #include // Qt #include #include #include namespace Gwenview { using DBusBoolReplyWatcher = QFutureWatcher>; using DBusStringReplyWatcher = QFutureWatcher>; inline QString screenSaverServiceName() { return QStringLiteral("org.freedesktop.ScreenSaver"); } LockScreenWatcher::LockScreenWatcher(QObject *parent) : QObject(parent) { auto screenLockServiceWatcher = new QDBusServiceWatcher(this); connect(screenLockServiceWatcher, &QDBusServiceWatcher::serviceOwnerChanged, this, &LockScreenWatcher::onScreenSaverServiceOwnerChanged); screenLockServiceWatcher->setWatchMode(QDBusServiceWatcher::WatchForOwnerChange); screenLockServiceWatcher->addWatchedService(screenSaverServiceName()); if (QDBusConnection::sessionBus().interface()) { auto watcher = new DBusBoolReplyWatcher(this); connect(watcher, &DBusBoolReplyWatcher::finished, this, &LockScreenWatcher::onServiceRegisteredQueried); connect(watcher, &DBusBoolReplyWatcher::canceled, watcher, &DBusBoolReplyWatcher::deleteLater); watcher->setFuture( QtConcurrent::run(&QDBusConnectionInterface::isServiceRegistered, QDBusConnection::sessionBus().interface(), screenSaverServiceName())); } } LockScreenWatcher::~LockScreenWatcher() = default; bool LockScreenWatcher::isLocked() const { return mLocked; } void LockScreenWatcher::onScreenSaverServiceOwnerChanged(const QString &serviceName, const QString &oldOwner, const QString &newOwner) { Q_UNUSED(oldOwner) if (serviceName != screenSaverServiceName()) { return; } delete mScreenSaverInterface; mScreenSaverInterface = nullptr; if (!newOwner.isEmpty()) { mScreenSaverInterface = new OrgFreedesktopScreenSaverInterface(newOwner, QStringLiteral("/ScreenSaver"), QDBusConnection::sessionBus(), this); connect(mScreenSaverInterface, &OrgFreedesktopScreenSaverInterface::ActiveChanged, this, &LockScreenWatcher::onScreenSaverActiveChanged); auto watcher = new QDBusPendingCallWatcher(mScreenSaverInterface->GetActive(), this); connect(watcher, &QDBusPendingCallWatcher::finished, this, &LockScreenWatcher::onActiveQueried); } else { if (mLocked) { // reset mLocked = false; Q_EMIT isLockedChanged(mLocked); } } } void LockScreenWatcher::onServiceRegisteredQueried() { auto watcher = dynamic_cast(sender()); if (!watcher) { return; } const QDBusReply &reply = watcher->result(); if (reply.isValid() && reply.value()) { auto ownerWatcher = new DBusStringReplyWatcher(this); connect(ownerWatcher, &DBusStringReplyWatcher::finished, this, &LockScreenWatcher::onServiceOwnerQueried); connect(ownerWatcher, &DBusStringReplyWatcher::canceled, ownerWatcher, &DBusStringReplyWatcher::deleteLater); ownerWatcher->setFuture( QtConcurrent::run(&QDBusConnectionInterface::serviceOwner, QDBusConnection::sessionBus().interface(), screenSaverServiceName())); } watcher->deleteLater(); } void LockScreenWatcher::onServiceOwnerQueried() { auto watcher = dynamic_cast(sender()); if (!watcher) { return; } const QDBusReply reply = watcher->result(); if (reply.isValid()) { onScreenSaverServiceOwnerChanged(screenSaverServiceName(), QString(), reply.value()); } watcher->deleteLater(); } void LockScreenWatcher::onActiveQueried(QDBusPendingCallWatcher *watcher) { QDBusPendingReply reply = *watcher; if (!reply.isError()) { onScreenSaverActiveChanged(reply.value()); } watcher->deleteLater(); } void LockScreenWatcher::onScreenSaverActiveChanged(bool isActive) { if (mLocked == isActive) { return; } mLocked = isActive; Q_EMIT isLockedChanged(mLocked); } } #include "moc_lockscreenwatcher.cpp"