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/*
* Copyright 2007 Aaron Seigo <aseigo@kde.org>
* Copyright 2008 Alex Merry <alex.merry@kdemail.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 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 Library 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 "timeengine.h"
#include <QDate>
#include <QDBusConnection>
#include <QStringList>
#include <QTime>
#include <QSocketNotifier>
#include <QTimeZone>
#include <Solid/PowerManagement>
#ifdef Q_OS_LINUX
#include <sys/timerfd.h>
#include <unistd.h>
#include <fcntl.h>
#endif
#include "timesource.h"
//timezone is defined in msvc
#ifdef timezone
#undef timezone
#endif
TimeEngine::TimeEngine(QObject *parent, const QVariantList &args)
: Plasma::DataEngine(parent, args)
{
Q_UNUSED(args)
setMinimumPollingInterval(333);
// To have translated timezone names
// (effectively a noop if the catalog is already present).
////KF5 port: remove this line and define TRANSLATION_DOMAIN in CMakeLists.txt instead
//KLocale::global()->insertCatalog("timezones4");
QTimer::singleShot(0, this, &TimeEngine::init);
}
TimeEngine::~TimeEngine()
{
}
void TimeEngine::init()
{
QDBusConnection dbus = QDBusConnection::sessionBus();
dbus.connect(QString(), QString(), QStringLiteral("org.kde.KTimeZoned"), QStringLiteral("timeZoneChanged"), this, SLOT(tzConfigChanged()));
#ifdef Q_OS_LINUX
//monitor for the system clock being changed
auto timeChangedFd = timerfd_create(CLOCK_REALTIME, O_CLOEXEC | O_NONBLOCK);
itimerspec timespec;
memset(×pec, 0, sizeof(timespec)); //set all timers to 0 seconds, which creates a timer that won't do anything
int err = timerfd_settime(timeChangedFd, 3, ×pec, 0); //monitor for the time changing
//(flags == TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET). However these are not exposed in glibc so value is hardcoded
if (err) {
qWarning() << "Could not create timer with TFD_TIMER_CANCEL_ON_SET. Clock skews will not be detected. Error:" << qPrintable(strerror(err));
}
connect(this, &QObject::destroyed, [timeChangedFd]() {
close(timeChangedFd);
});
auto notifier = new QSocketNotifier(timeChangedFd, QSocketNotifier::Read, this);
connect(notifier, &QSocketNotifier::activated, this, [this](int fd) {
uint64_t c;
read(fd, &c, 8);
clockSkewed();
});
#else
dbus.connect(QString(), "/org/kde/kcmshell_clock", "org.kde.kcmshell_clock", "clockUpdated", this, SLOT(clockSkewed()));
connect( Solid::PowerManagement::notifier(), SIGNAL(resumingFromSuspend()), this , SLOT(clockSkewed()) );
#endif
}
void TimeEngine::clockSkewed()
{
qDebug() << "Time engine Clock skew signaled";
updateAllSources();
forceImmediateUpdateOfAllVisualizations();
}
void TimeEngine::tzConfigChanged()
{
qDebug() << "Local timezone changed signaled";
TimeSource *s = qobject_cast<TimeSource *>(containerForSource(QStringLiteral("Local")));
if (s) {
s->setTimeZone(QStringLiteral("Local"));
}
updateAllSources();
forceImmediateUpdateOfAllVisualizations();
}
QStringList TimeEngine::sources() const
{
QStringList sources;
Q_FOREACH(const QByteArray &tz, QTimeZone::availableTimeZoneIds()) {
sources << QString(tz.constData());
}
sources << QStringLiteral("Local");
return sources;
}
bool TimeEngine::sourceRequestEvent(const QString &name)
{
addSource(new TimeSource(name, this));
return true;
}
bool TimeEngine::updateSourceEvent(const QString &tz)
{
TimeSource *s = qobject_cast<TimeSource *>(containerForSource(tz));
if (s) {
s->updateTime();
return true;
}
return false;
}
K_EXPORT_PLASMA_DATAENGINE_WITH_JSON(time, TimeEngine, "plasma-dataengine-time.json")
#include "timeengine.moc"
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