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/*
SPDX-FileCopyrightText: 2018 David Edmundson <davidedmundson@kde.org>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#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 <QHash>
#include <QThreadStorage>
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 << QLatin1Char('/') + d->m_config->name();
const auto cfgSources = d->m_config->additionalConfigSources();
for (const QString &file : cfgSources) {
watchedPaths << QLatin1Char('/') + file;
}
if (d->m_config->openFlags() & KConfig::IncludeGlobals) {
watchedPaths << QStringLiteral("/kdeglobals");
}
for (const QString &path : std::as_const(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;
KSharedConfig::Ptr KConfigWatcher::config() const
{
return d->m_config;
}
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);
}
Q_EMIT configChanged(group, it.value());
}
}
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