File indexing completed on 2024-04-21 14:56:11

 /*
     Copyright 2006-2007 Kevin Ottens <ervin@kde.org>
     Copyright 2013 Lukas Tinkl <ltinkl@redhat.com>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) version 3, or any
     later version accepted by the membership of KDE e.V. (or its
     successor approved by the membership of KDE e.V.), which shall
     act as a proxy defined in Section 6 of version 3 of the license.
 
     This library 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
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "powermanagement.h"
 #include "powermanagement_p.h"
 
 #include <QCoreApplication>
 
 Q_GLOBAL_STATIC(Solid::PowerManagementPrivate, globalPowerManager)
 
 Solid::PowerManagementPrivate::PowerManagementPrivate()
     : managerIface("org.freedesktop.PowerManagement",
                    "/org/freedesktop/PowerManagement",
                    QDBusConnection::sessionBus()),
     policyAgentIface("org.kde.Solid.PowerManagement.PolicyAgent",
                      "/org/kde/Solid/PowerManagement/PolicyAgent",
                      QDBusConnection::sessionBus()),
     inhibitIface("org.freedesktop.PowerManagement.Inhibit",
                  "/org/freedesktop/PowerManagement/Inhibit",
                  QDBusConnection::sessionBus()),
     serviceWatcher("org.kde.Solid.PowerManagement",
                    QDBusConnection::sessionBus(),
                    QDBusServiceWatcher::WatchForRegistration | QDBusServiceWatcher::WatchForUnregistration),
     powerSaveStatus(false)
 {
     serviceWatcher.addWatchedService(QLatin1String("org.freedesktop.PowerManagement"));
 
     connect(&managerIface, SIGNAL(CanSuspendChanged(bool)),
             this, SLOT(slotCanSuspendChanged(bool)));
     connect(&managerIface, SIGNAL(CanHibernateChanged(bool)),
             this, SLOT(slotCanHibernateChanged(bool)));
     connect(&managerIface, SIGNAL(CanHybridSuspendChanged(bool)),
             this, SLOT(slotCanHybridSuspendChanged(bool)));
     connect(&managerIface, SIGNAL(PowerSaveStatusChanged(bool)),
             this, SLOT(slotPowerSaveStatusChanged(bool)));
     connect(&serviceWatcher, SIGNAL(serviceRegistered(QString)),
             this, SLOT(slotServiceRegistered(QString)));
     connect(&serviceWatcher, SIGNAL(serviceUnregistered(QString)),
             this, SLOT(slotServiceUnregistered(QString)));
 
     // If the service is registered, trigger the connection immediately
     if (QDBusConnection::sessionBus().interface()->isServiceRegistered("org.kde.Solid.PowerManagement")) {
         slotServiceRegistered("org.kde.Solid.PowerManagement");
     }
     if (QDBusConnection::sessionBus().interface()->isServiceRegistered(QLatin1String("org.freedesktop.PowerManagement"))) {
         slotServiceRegistered(QLatin1String("org.freedesktop.PowerManagement"));
     }
 }
 
 Solid::PowerManagementPrivate::~PowerManagementPrivate()
 {
 }
 
 Solid::PowerManagement::Notifier::Notifier()
 {
 }
 
 bool Solid::PowerManagement::appShouldConserveResources()
 {
     return globalPowerManager->managerIface.GetPowerSaveStatus();
 }
 
 QSet<Solid::PowerManagement::SleepState> Solid::PowerManagement::supportedSleepStates()
 {
     return globalPowerManager->supportedSleepStates;
 }
 
 void Solid::PowerManagement::requestSleep(SleepState state, QObject *receiver, const char *member)
 {
     Q_UNUSED(receiver)
     Q_UNUSED(member)
 
     if (!globalPowerManager->supportedSleepStates.contains(state)) {
         return;
     }
 
     switch (state) {
     case StandbyState:
     case SuspendState:
         globalPowerManager->managerIface.Suspend();
         break;
     case HibernateState:
         globalPowerManager->managerIface.Hibernate();
         break;
     }
 }
 
 int Solid::PowerManagement::beginSuppressingSleep(const QString &reason)
 {
     QDBusReply<uint> reply;
     if (globalPowerManager->policyAgentIface.isValid()) {
         reply = globalPowerManager->policyAgentIface.AddInhibition(
                     (uint)PowerManagementPrivate::InterruptSession,
                     QCoreApplication::applicationName(), reason);
     } else {
         // Fallback to the fd.o Inhibit interface
         reply = globalPowerManager->inhibitIface.Inhibit(QCoreApplication::applicationName(), reason);
     }
 
     if (reply.isValid()) {
         return reply;
     } else {
         return -1;
     }
 }
 
 bool Solid::PowerManagement::stopSuppressingSleep(int cookie)
 {
     if (globalPowerManager->policyAgentIface.isValid()) {
         return globalPowerManager->policyAgentIface.ReleaseInhibition(cookie).isValid();
     } else {
         // Fallback to the fd.o Inhibit interface
         return globalPowerManager->inhibitIface.UnInhibit(cookie).isValid();
     }
 }
 
 int Solid::PowerManagement::beginSuppressingScreenPowerManagement(const QString &reason)
 {
     if (globalPowerManager->policyAgentIface.isValid()) {
         QDBusReply<uint> reply = globalPowerManager->policyAgentIface.AddInhibition(
                                      (uint)PowerManagementPrivate::ChangeScreenSettings,
                                      QCoreApplication::applicationName(), reason);
 
         if (reply.isValid()) {
             QDBusMessage message = QDBusMessage::createMethodCall("org.freedesktop.ScreenSaver", "/ScreenSaver",
                                    "org.freedesktop.ScreenSaver", "Inhibit");
             message << QCoreApplication::applicationName();
             message << reason;
 
             QDBusPendingReply<uint> ssReply = QDBusConnection::sessionBus().asyncCall(message);
             ssReply.waitForFinished();
             if (ssReply.isValid()) {
                 globalPowerManager->screensaverCookiesForPowerDevilCookies.insert(reply, ssReply.value());
             }
 
             return reply;
         } else {
             return -1;
         }
     } else {
         // No way to fallback on something, hence return failure
         return -1;
     }
 }
 
 bool Solid::PowerManagement::stopSuppressingScreenPowerManagement(int cookie)
 {
     if (globalPowerManager->policyAgentIface.isValid()) {
         bool result = globalPowerManager->policyAgentIface.ReleaseInhibition(cookie).isValid();
 
         if (globalPowerManager->screensaverCookiesForPowerDevilCookies.contains(cookie)) {
             QDBusMessage message = QDBusMessage::createMethodCall("org.freedesktop.ScreenSaver", "/ScreenSaver",
                                    "org.freedesktop.ScreenSaver", "UnInhibit");
             message << globalPowerManager->screensaverCookiesForPowerDevilCookies.take(cookie);
             QDBusConnection::sessionBus().asyncCall(message);
         }
 
         return result;
     } else {
         // No way to fallback on something, hence return failure
         return false;
     }
 }
 
 Solid::PowerManagement::Notifier *Solid::PowerManagement::notifier()
 {
     return globalPowerManager;
 }
 
 void Solid::PowerManagementPrivate::slotCanSuspendChanged(bool newState)
 {
     if (supportedSleepStates.contains(Solid::PowerManagement::SuspendState) == newState) {
         return;
     }
 
     if (newState) {
         supportedSleepStates += Solid::PowerManagement::SuspendState;
     } else {
         supportedSleepStates -= Solid::PowerManagement::SuspendState;
     }
 }
 
 void Solid::PowerManagementPrivate::slotCanHibernateChanged(bool newState)
 {
     if (supportedSleepStates.contains(Solid::PowerManagement::HibernateState) == newState) {
         return;
     }
 
     if (newState) {
         supportedSleepStates += Solid::PowerManagement::HibernateState;
     } else {
         supportedSleepStates -= Solid::PowerManagement::HibernateState;
     }
 }
 
 void Solid::PowerManagementPrivate::slotCanHybridSuspendChanged(bool newState)
 {
     if (supportedSleepStates.contains(Solid::PowerManagement::HybridSuspendState) == newState) {
         return;
     }
 
     if (newState) {
         supportedSleepStates += Solid::PowerManagement::HybridSuspendState;
     } else {
         supportedSleepStates -= Solid::PowerManagement::HybridSuspendState;
     }
 }
 
 void Solid::PowerManagementPrivate::slotPowerSaveStatusChanged(bool newState)
 {
     if (powerSaveStatus == newState) {
         return;
     }
 
     powerSaveStatus = newState;
     emit appShouldConserveResourcesChanged(powerSaveStatus);
 }
 
 void Solid::PowerManagementPrivate::slotServiceRegistered(const QString &serviceName)
 {
     if (serviceName == QLatin1String("org.freedesktop.PowerManagement")) {
         // Load all the properties
         QDBusPendingReply<bool> suspendReply = managerIface.CanSuspend();
         suspendReply.waitForFinished();
         slotCanSuspendChanged(suspendReply.isValid() ? suspendReply.value() : false);
 
         QDBusPendingReply<bool> hibernateReply = managerIface.CanHibernate();
         hibernateReply.waitForFinished();
         slotCanHibernateChanged(hibernateReply.isValid() ? hibernateReply.value() : false);
 
         QDBusPendingReply<bool> hybridSuspendReply = managerIface.CanHybridSuspend();
         hybridSuspendReply.waitForFinished();
         slotCanHybridSuspendChanged(hybridSuspendReply.isValid() ? hybridSuspendReply.value() : false);
 
         QDBusPendingReply<bool> saveStatusReply = managerIface.GetPowerSaveStatus();
         saveStatusReply.waitForFinished();
         slotPowerSaveStatusChanged(saveStatusReply.isValid() ? saveStatusReply.value() : false);
     } else {
         // Is the resume signal available?
         QDBusMessage call = QDBusMessage::createMethodCall("org.kde.Solid.PowerManagement",
                             "/org/kde/Solid/PowerManagement",
                             "org.kde.Solid.PowerManagement",
                             "backendCapabilities");
         QDBusPendingReply< uint > reply = QDBusConnection::sessionBus().asyncCall(call);
         reply.waitForFinished();
 
         if (reply.isValid() && reply.value() > 0) {
             // Connect the signal
             QDBusConnection::sessionBus().connect(QLatin1String("org.kde.Solid.PowerManagement"),
                                                   QLatin1String("/org/kde/Solid/PowerManagement/Actions/SuspendSession"),
                                                   QLatin1String("org.kde.Solid.PowerManagement.Actions.SuspendSession"),
                                                   QLatin1String("resumingFromSuspend"),
                                                   this,
                                                   SIGNAL(resumingFromSuspend()));
         }
     }
 }
 
 void Solid::PowerManagementPrivate::slotServiceUnregistered(const QString &serviceName)
 {
     if (serviceName == QLatin1String("org.freedesktop.PowerManagement")) {
         // Reset the values
         slotCanSuspendChanged(false);
         slotCanHibernateChanged(false);
         slotCanHybridSuspendChanged(false);
         slotPowerSaveStatusChanged(false);
     } else {
         // Disconnect the signal
         QDBusConnection::sessionBus().disconnect(QLatin1String("org.kde.Solid.PowerManagement"),
                 QLatin1String("/org/kde/Solid/PowerManagement"),
                 QLatin1String("org.kde.Solid.PowerManagement"),
                 QLatin1String("resumingFromSuspend"),
                 this,
                 SIGNAL(resumingFromSuspend()));
     }
 }
 
 #include "moc_powermanagement.cpp"
 #include "moc_powermanagement_p.cpp"