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/*
SPDX-FileCopyrightText: 2016 Martin Gräßlin <mgraesslin@kde.org>
SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
#include "powermanagement.h"
#include <QDBusConnection>
#include <QDBusConnectionInterface>
#include <QDBusServiceWatcher>
static const QString s_fdoPowerService = QStringLiteral("org.freedesktop.PowerManagement");
static const QString s_fdoPowerPath = QStringLiteral("/org/freedesktop/PowerManagement");
class PowerManagementInstance : public PowerManagement
{
Q_OBJECT
public:
explicit PowerManagementInstance()
: PowerManagement()
{
}
};
Q_GLOBAL_STATIC(PowerManagementInstance, s_instance)
class PowerManagement::Private
{
public:
Private(PowerManagement *q);
void update();
void setCanSuspend(bool set);
void setCanHibernate(bool set);
bool serviceRegistered;
bool canSuspend;
bool canHibernate;
QScopedPointer<QDBusServiceWatcher> fdoPowerServiceWatcher;
private:
void updateProperty(const QString &dbusName, void (Private::*setter)(bool));
PowerManagement *q;
};
PowerManagement::Private::Private(PowerManagement *q)
: serviceRegistered(false)
, canSuspend(false)
, canHibernate(false)
, fdoPowerServiceWatcher(new QDBusServiceWatcher(s_fdoPowerService,
QDBusConnection::sessionBus(),
QDBusServiceWatcher::WatchForUnregistration | QDBusServiceWatcher::WatchForRegistration))
, q(q)
{
}
void PowerManagement::Private::update()
{
serviceRegistered = true;
updateProperty(QStringLiteral("CanSuspend"), &Private::setCanSuspend);
updateProperty(QStringLiteral("CanHibernate"), &Private::setCanHibernate);
}
void PowerManagement::Private::updateProperty(const QString &dbusName, void (Private::*setter)(bool))
{
QDBusMessage message = QDBusMessage::createMethodCall(s_fdoPowerService, s_fdoPowerPath, s_fdoPowerService, dbusName);
QDBusPendingReply<bool> reply = QDBusConnection::sessionBus().asyncCall(message);
QDBusPendingCallWatcher *callWatcher = new QDBusPendingCallWatcher(reply, q);
QObject::connect(callWatcher, &QDBusPendingCallWatcher::finished, q, [this, setter](QDBusPendingCallWatcher *self) {
QDBusPendingReply<bool> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
return;
}
((this)->*setter)(reply.value());
});
}
void PowerManagement::Private::setCanHibernate(bool set)
{
if (canHibernate == set) {
return;
}
canHibernate = set;
Q_EMIT q->canHibernateChanged();
}
void PowerManagement::Private::setCanSuspend(bool set)
{
if (canSuspend == set) {
return;
}
canSuspend = set;
Q_EMIT q->canSuspendChanged();
}
PowerManagement *PowerManagement::instance()
{
return s_instance;
}
PowerManagement::PowerManagement()
: QObject()
, d(new Private(this))
{
connect(d->fdoPowerServiceWatcher.data(), &QDBusServiceWatcher::serviceRegistered, this, [this] {
d->update();
});
connect(d->fdoPowerServiceWatcher.data(), &QDBusServiceWatcher::serviceUnregistered, this, [this] {
d->serviceRegistered = false;
d->setCanSuspend(false);
d->setCanHibernate(false);
});
// check whether the service is registered
QDBusMessage message = QDBusMessage::createMethodCall(QStringLiteral("org.freedesktop.DBus"),
QStringLiteral("/"),
QStringLiteral("org.freedesktop.DBus"),
QStringLiteral("ListNames"));
QDBusPendingReply<QStringList> async = QDBusConnection::sessionBus().asyncCall(message);
QDBusPendingCallWatcher *callWatcher = new QDBusPendingCallWatcher(async, this);
connect(callWatcher, &QDBusPendingCallWatcher::finished, this, [this](QDBusPendingCallWatcher *self) {
QDBusPendingReply<QStringList> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
return;
}
if (reply.value().contains(s_fdoPowerService)) {
d->update();
}
});
}
PowerManagement::~PowerManagement()
{
}
void PowerManagement::suspend()
{
if (!d->serviceRegistered) {
return;
}
if (!d->canSuspend) {
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_fdoPowerService, s_fdoPowerPath, s_fdoPowerService, QStringLiteral("Suspend"));
QDBusConnection::sessionBus().asyncCall(message);
}
void PowerManagement::hibernate()
{
if (!d->serviceRegistered) {
return;
}
if (!d->canHibernate) {
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_fdoPowerService, s_fdoPowerPath, s_fdoPowerService, QStringLiteral("Hibernate"));
QDBusConnection::sessionBus().asyncCall(message);
}
bool PowerManagement::canSuspend() const
{
return d->canSuspend;
}
bool PowerManagement::canHibernate() const
{
return d->canHibernate;
}
#include "powermanagement.moc"
#include "moc_powermanagement.cpp"
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