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/*****************************************************************************
* Copyright (C) 2010 by Peter Penz <[email protected]> *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
* This library 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 *
* Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public License *
* along with this library; see the file COPYING.LIB. If not, write to *
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, *
* Boston, MA 02110-1301, USA. *
*****************************************************************************/
#include "kmetadatamodel.h"
#include <kfileitem.h>
#include "kloadmetadatathread_p.h"
#include <kurl.h>
class KMetaDataModel::Private
{
public:
Private(KMetaDataModel* parent);
~Private();
void slotLoadingFinished();
QList<KFileItem> m_fileItems;
#ifdef HAVE_NEPOMUK
QHash<KUrl, Nepomuk::Variant> m_data;
QList<KLoadMetaDataThread*> m_metaDataThreads;
KLoadMetaDataThread* m_latestMetaDataThread;
#endif
private:
KMetaDataModel* const q;
};
KMetaDataModel::Private::Private(KMetaDataModel* parent) :
m_fileItems(),
#ifdef HAVE_NEPOMUK
m_data(),
m_metaDataThreads(),
m_latestMetaDataThread(0),
#endif
q(parent)
{
}
KMetaDataModel::Private::~Private()
{
}
KMetaDataModel::KMetaDataModel(QObject* parent) :
QObject(parent),
d(new Private(this))
{
}
KMetaDataModel::~KMetaDataModel()
{
delete d;
}
void KMetaDataModel::Private::slotLoadingFinished()
{
#ifdef HAVE_NEPOMUK
// The thread that has emitted the finished() signal
// will get deleted and removed from m_metaDataThreads.
const int threadsCount = m_metaDataThreads.count();
for (int i = 0; i < threadsCount; ++i) {
KLoadMetaDataThread* thread = m_metaDataThreads[i];
if (thread == q->sender()) {
m_metaDataThreads.removeAt(i);
if (thread != m_latestMetaDataThread) {
// Ignore data of older threads, as the data got
// obsolete by m_latestMetaDataThread.
thread->deleteLater();
return;
}
}
}
m_data = m_latestMetaDataThread->data();
m_latestMetaDataThread->deleteLater();
#endif
emit q->loadingFinished();
}
void KMetaDataModel::setItems(const KFileItemList& items)
{
d->m_fileItems = items;
#ifdef HAVE_NEPOMUK
QList<KUrl> urls;
foreach (const KFileItem& item, items) {
const KUrl url = item.nepomukUri();
if (url.isValid()) {
urls.append(url);
}
}
// Cancel all threads that have not emitted a finished() signal.
// The deleting of those threads is done in slotLoadingFinished().
foreach (KLoadMetaDataThread* thread, d->m_metaDataThreads) {
thread->cancel();
}
// create a new thread that will provide the meeta data for the items
d->m_latestMetaDataThread = new KLoadMetaDataThread(this);
connect(d->m_latestMetaDataThread, SIGNAL(finished()), this, SLOT(slotLoadingFinished()));
d->m_latestMetaDataThread->load(urls);
d->m_metaDataThreads.append(d->m_latestMetaDataThread);
#endif
}
QString KMetaDataModel::group(const KUrl& metaDataUri) const
{
QString group; // return value
const QString uri = metaDataUri.url();
if (uri == QLatin1String("http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#width")) {
group = QLatin1String("0sizeA");
} else if (uri == QLatin1String("http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#height")) {
group = QLatin1String("0sizeB");
}
return group;
}
KFileItemList KMetaDataModel::items() const
{
return d->m_fileItems;
}
#ifdef HAVE_NEPOMUK
QHash<KUrl, Nepomuk::Variant> KMetaDataModel::data() const
{
return d->m_data;
}
QHash<KUrl, Nepomuk::Variant> KMetaDataModel::loadData() const
{
return QHash<KUrl, Nepomuk::Variant>();
}
#endif
#include "kmetadatamodel.moc"
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