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/***************************************************************************
* Copyright (C) 2014 by Frank Reininghaus <[email protected]> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, 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 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 "mountpointobservercache.h"
#include "mountpointobserver.h"
#include <KGlobal>
#include <KMountPoint>
#include <QTimer>
class MountPointObserverCacheSingleton
{
public:
MountPointObserverCache instance;
};
K_GLOBAL_STATIC(MountPointObserverCacheSingleton, s_MountPointObserverCache)
MountPointObserverCache::MountPointObserverCache() :
m_observerForMountPoint(),
m_mountPointForObserver(),
m_updateTimer(0)
{
m_updateTimer = new QTimer(this);
}
MountPointObserverCache::~MountPointObserverCache()
{
}
MountPointObserverCache* MountPointObserverCache::instance()
{
return &s_MountPointObserverCache->instance;
}
MountPointObserver* MountPointObserverCache::observerForPath(const QString& path)
{
// Try to share the observer with other paths that have the same mount point.
QString mountPointPath;
KMountPoint::Ptr mountPoint = KMountPoint::currentMountPoints().findByPath(path);
if (mountPoint) {
mountPointPath = mountPoint->mountPoint();
} else {
// Even if determining the mount point failed, KDiskFreeSpaceInfo might still
// be able to retrieve information about the path.
mountPointPath = path;
}
MountPointObserver* observer = m_observerForMountPoint.value(mountPointPath);
if (!observer) {
observer = new MountPointObserver(mountPointPath, this);
m_observerForMountPoint.insert(mountPointPath, observer);
m_mountPointForObserver.insert(observer, mountPointPath);
Q_ASSERT(m_observerForMountPoint.count() == m_mountPointForObserver.count());
connect(observer, SIGNAL(destroyed(QObject*)), this, SLOT(slotObserverDestroyed(QObject*)));
if (!m_updateTimer->isActive()) {
m_updateTimer->start(10000);
}
connect(m_updateTimer, SIGNAL(timeout()), observer, SLOT(update()));
}
return observer;
}
void MountPointObserverCache::slotObserverDestroyed(QObject* observer)
{
Q_ASSERT(m_mountPointForObserver.contains(observer));
const QString& path = m_mountPointForObserver.value(observer);
Q_ASSERT(m_observerForMountPoint.contains(path));
m_observerForMountPoint.remove(path);
m_mountPointForObserver.remove(observer);
Q_ASSERT(m_observerForMountPoint.count() == m_mountPointForObserver.count());
if (m_mountPointForObserver.isEmpty()) {
m_updateTimer->stop();
}
}
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