Add QDBusServiceWatcher class.

1 files changed, 211 insertions, 0 deletions

diff --git a/src/dbus/qdbusservicewatcher.cpp b/src/dbus/qdbusservicewatcher.cpp
new file mode 100644
index 0000000..d8a33c3
--- /dev/null
+++ b/src/dbus/qdbusservicewatcher.cpp
@@ -0,0 +1,211 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDBus module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdbusservicewatcher.h"
+#include "qdbusconnection.h"
+#include "qdbus_symbols_p.h"
+
+#include <QStringList>
+
+#include <private/qobject_p.h>
+
+Q_GLOBAL_STATIC_WITH_ARGS(QString, busService, (QLatin1String(DBUS_SERVICE_DBUS)))
+Q_GLOBAL_STATIC_WITH_ARGS(QString, busPath, (QLatin1String(DBUS_PATH_DBUS)))
+Q_GLOBAL_STATIC_WITH_ARGS(QString, busInterface, (QLatin1String(DBUS_INTERFACE_DBUS)))
+Q_GLOBAL_STATIC_WITH_ARGS(QString, signalName, (QLatin1String("NameOwnerChanged")))
+
+class QDBusServiceWatcherPrivate: public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QDBusServiceWatcher)
+public:
+    QDBusServiceWatcherPrivate(const QDBusConnection &c, QDBusServiceWatcher::WatchMode wm)
+        : connection(c), watchMode(wm)
+    {
+    }
+
+    QStringList servicesWatched;
+    QDBusConnection connection;
+    QDBusServiceWatcher::WatchMode watchMode;
+
+    void _q_serviceOwnerChanged(const QString &, const QString &, const QString &);
+    void setConnection(const QStringList &services, const QDBusConnection &c, QDBusServiceWatcher::WatchMode watchMode);
+
+    QStringList matchArgsForService(const QString &service);
+    void addService(const QString &service);
+    void removeService(const QString &service);
+};
+
+void QDBusServiceWatcherPrivate::_q_serviceOwnerChanged(const QString &service, const QString &oldOwner, const QString &newOwner)
+{
+    Q_Q(QDBusServiceWatcher);
+    emit q->serviceOwnerChanged(service, oldOwner, newOwner);
+    if (oldOwner.isEmpty())
+        emit q->serviceRegistered(service);
+    else if (newOwner.isEmpty())
+        emit q->serviceUnregistered(service);
+}
+
+void QDBusServiceWatcherPrivate::setConnection(const QStringList &s, const QDBusConnection &c, QDBusServiceWatcher::WatchMode wm)
+{
+    if (connection.isConnected()) {
+        // remove older rules
+        foreach (const QString &s, servicesWatched)
+            removeService(s);
+    }
+
+    connection = c;
+    watchMode = wm;
+    servicesWatched = s;
+
+    if (connection.isConnected()) {
+        // add new rules
+        foreach (const QString &s, servicesWatched)
+            addService(s);
+    }
+}
+
+QStringList QDBusServiceWatcherPrivate::matchArgsForService(const QString &service)
+{
+    QStringList matchArgs;
+    matchArgs << service;
+
+    switch (watchMode) {
+    case QDBusServiceWatcher::WatchForOwnerChange:
+        break;
+
+    case QDBusServiceWatcher::WatchForRegistration:
+        matchArgs << QString::fromLatin1("", 0);
+        break;
+
+    case QDBusServiceWatcher::WatchForUnregistration:
+        matchArgs << QString() << QString::fromLatin1("", 0);
+        break;
+    }
+    return matchArgs;
+}
+
+void QDBusServiceWatcherPrivate::addService(const QString &service)
+{
+    QStringList matchArgs = matchArgsForService(service);
+    connection.connect(*busService(), *busPath(), *busInterface(), *signalName(),
+                       matchArgs, QString(), q_func(),
+                       SLOT(_q_serviceOwnerChanged(QString,QString,QString)));
+}
+
+void QDBusServiceWatcherPrivate::removeService(const QString &service)
+{
+    QStringList matchArgs = matchArgsForService(service);
+    connection.disconnect(*busService(), *busPath(), *busInterface(), *signalName(),
+                          matchArgs, QString(), q_func(),
+                          SLOT(_q_serviceOwnerChanged(QString,QString,QString)));
+}
+
+QDBusServiceWatcher::QDBusServiceWatcher(QObject *parent)
+    : QObject(*new QDBusServiceWatcherPrivate(QDBusConnection(QString()), WatchForOwnerChange), parent)
+{
+}
+
+QDBusServiceWatcher::QDBusServiceWatcher(const QString &service, const QDBusConnection &connection, WatchMode watchMode, QObject *parent)
+    : QObject(*new QDBusServiceWatcherPrivate(connection, watchMode), parent)
+{
+    d_func()->setConnection(QStringList() << service, connection, watchMode);
+}
+
+QDBusServiceWatcher::~QDBusServiceWatcher()
+{
+}
+
+QStringList QDBusServiceWatcher::watchedServices() const
+{
+    return d_func()->servicesWatched;
+}
+
+void QDBusServiceWatcher::setWatchedServices(const QStringList &services)
+{
+    Q_D(QDBusServiceWatcher);
+    if (services == d->servicesWatched)
+        return;
+    d->setConnection(services, d->connection, d->watchMode);
+}
+
+void QDBusServiceWatcher::addWatchedService(const QString &newService)
+{
+    Q_D(QDBusServiceWatcher);
+    if (d->servicesWatched.contains(newService))
+        return;
+    d->addService(newService);
+    d->servicesWatched << newService;
+}
+
+bool QDBusServiceWatcher::removeWatchedService(const QString &service)
+{
+    Q_D(QDBusServiceWatcher);
+    d->removeService(service);
+    return d->servicesWatched.removeOne(service);
+}
+
+QDBusServiceWatcher::WatchMode QDBusServiceWatcher::watchMode() const
+{
+    return d_func()->watchMode;
+}
+
+void QDBusServiceWatcher::setWatchMode(WatchMode mode)
+{
+    Q_D(QDBusServiceWatcher);
+    if (mode == d->watchMode)
+        return;
+    d->setConnection(d->servicesWatched, d->connection, mode);
+}
+
+QDBusConnection QDBusServiceWatcher::connection() const
+{
+    return d_func()->connection;
+}
+
+void QDBusServiceWatcher::setConnection(const QDBusConnection &connection)
+{
+    Q_D(QDBusServiceWatcher);
+    if (connection.name() == d->connection.name())
+        return;
+    d->setConnection(d->servicesWatched, connection, d->watchMode);
+}
+
+#include "moc_qdbusservicewatcher.cpp"