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/*
* Copyright 2018 David Edmundson <davidedmundson@kde.org>
*
* 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 "kconfigwatcher.h"
#include "config-kconfig.h"
#include "kconfig_core_log_settings.h"
#if KCONFIG_USE_DBUS
#include <QDBusConnection>
#include <QDBusMessage>
#include <QDBusMetaType>
#endif
#include <QDebug>
#include <QThreadStorage>
#include <QHash>
class KConfigWatcherPrivate {
public:
KSharedConfig::Ptr m_config;
};
KConfigWatcher::Ptr KConfigWatcher::create(const KSharedConfig::Ptr &config)
{
static QThreadStorage<QHash<KSharedConfig*, QWeakPointer<KConfigWatcher>>> watcherList;
auto c = config.data();
KConfigWatcher::Ptr watcher;
if (!watcherList.localData().contains(c)) {
watcher = KConfigWatcher::Ptr(new KConfigWatcher(config));
watcherList.localData().insert(c, watcher.toWeakRef());
QObject::connect(watcher.data(), &QObject::destroyed, [c]() {
watcherList.localData().remove(c);
});
}
return watcherList.localData().value(c).toStrongRef();
}
KConfigWatcher::KConfigWatcher(const KSharedConfig::Ptr &config):
QObject (nullptr),
d(new KConfigWatcherPrivate)
{
Q_ASSERT(config);
#if KCONFIG_USE_DBUS
qDBusRegisterMetaType<QByteArrayList>();
qDBusRegisterMetaType<QHash<QString, QByteArrayList>>();
d->m_config = config;
QStringList watchedPaths;
watchedPaths <<QStringLiteral("/") + d->m_config->name();
for (const QString file: d->m_config->additionalConfigSources()) {
watchedPaths << QStringLiteral("/") + file;
}
if (d->m_config->openFlags() & KConfig::IncludeGlobals) {
watchedPaths << QStringLiteral("/kdeglobals");
}
for(const QString &path: qAsConst(watchedPaths)) {
QDBusConnection::sessionBus().connect(QString(),
path,
QStringLiteral("org.kde.kconfig.notify"),
QStringLiteral("ConfigChanged"),
this,
SLOT(onConfigChangeNotification(QHash<QString,QByteArrayList>)));
}
#else
qCWarning(KCONFIG_CORE_LOG) << "Use of KConfigWatcher without DBus support. You will not receive updates";
#endif
}
KConfigWatcher::~KConfigWatcher() = default;
void KConfigWatcher::onConfigChangeNotification(const QHash<QString, QByteArrayList> &changes)
{
//should we ever need it we can determine the file changed with QDbusContext::message().path(), but it doesn't seem too useful
d->m_config->reparseConfiguration();
for(auto it = changes.constBegin(); it != changes.constEnd(); it++) {
KConfigGroup group = d->m_config->group(QString());//top level group
const auto parts = it.key().split(QLatin1Char('\x1d')); //magic char, see KConfig
for(const QString &groupName: parts) {
group = group.group(groupName);
}
emit configChanged(group, it.value());
}
}
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