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/**
* projectM-qt -- Qt4 based projectM GUI
* Copyright (C)2003-2004 projectM Team
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* See 'LICENSE.txt' included within this release
*
*/
#ifndef QXML_PLAYLIST_HANDLER_HPP
#define QXML_PLAYLIST_HANDLER_HPP
#include <QXmlStreamReader>
#include <QXmlStreamWriter>
class QXmlPlaylistHandler {
public :
template <class ReadFunctor>
static QXmlStreamReader::Error readPlaylist (QIODevice * device, ReadFunctor & readFunc);
template <class WriteFunctor>
static void writePlaylist (QIODevice * device, WriteFunctor & writeFunc);
private:
template <class ReadFunctor>
static QXmlStreamReader::Error readPlaylistItem(QXmlStreamReader & reader, ReadFunctor & functor);
};
template <class ReadFunctor>
QXmlStreamReader::Error QXmlPlaylistHandler::readPlaylist (QIODevice * device, ReadFunctor & readFunc)
{
QXmlStreamReader reader ( device );
QXmlStreamReader::TokenType token;
try {
while ( !reader.atEnd() ) {
token = reader.readNext();
switch ( token )
{
case QXmlStreamReader::StartElement:
if (reader.name() == "presetplaylist") {
}
else if (reader.name() == "description") {
reader.readNext();
readFunc.setPlaylistDesc(reader.text().toString().replace("&", "&"));
}
else if (reader.name() == "item") {
readPlaylistItem<ReadFunctor>(reader, readFunc);
break;
}
break;
case QXmlStreamReader::NoToken:
break;
case QXmlStreamReader::Invalid:
break;
case QXmlStreamReader::StartDocument:
break;
case QXmlStreamReader::EndDocument:
break;
case QXmlStreamReader::EndElement:
break;
case QXmlStreamReader::Characters:
case QXmlStreamReader::Comment:
case QXmlStreamReader::DTD:
case QXmlStreamReader::EntityReference:
case QXmlStreamReader::ProcessingInstruction:
default:
break;
}
}
} catch (const QXmlStreamReader::Error & id) {
return id;
}
if (reader.hasError())
return reader.error();
else
return QXmlStreamReader::NoError;
}
template <class ReadFunctor>
QXmlStreamReader::Error QXmlPlaylistHandler::readPlaylistItem(QXmlStreamReader & reader, ReadFunctor & readFunctor) {
QString url, name;
int rating, breedability;
while (reader.readNext() != QXmlStreamReader::EndElement)
if (reader.name() == "url") {
bool repeat;
int result;
while (repeat = (result = reader.readNext()) == QXmlStreamReader::Characters)
url += reader.text().toString();
} else if (reader.name() == "rating") {
reader.readNext();
rating = reader.text().toString().toInt();
reader.readNext();
} else if (reader.name() == "breedability") {
reader.readNext();
breedability = reader.text().toString().toInt();
reader.readNext();
} else if (reader.name() == "name") {
bool repeat;
int result;
while (repeat = (result = reader.readNext()) == QXmlStreamReader::Characters)
name += reader.text().toString();
} else {
if (reader.name() == "")
continue;
else if (reader.hasError())
return reader.error();
else {
try {
reader.raiseError(QString("Unknown element name %1 ").arg(reader.name().toString()));
} catch (...) {
return reader.error();
}
}
}
readFunctor.appendItem(url, QFileInfo(url).fileName(), rating, breedability);
return QXmlStreamReader::NoError;
}
template <class WriteFunctor>
void QXmlPlaylistHandler::writePlaylist (QIODevice * device, WriteFunctor & writeFunctor ) {
QXmlStreamWriter writer(device);
writer.writeStartDocument();
writer.writeStartElement("presetplaylist");
writer.writeStartElement("description");
writer.writeCharacters(writeFunctor.playlistDesc());
writer.writeEndElement();
QString name;
QString url;
int rating;
int breedability;
while (writeFunctor.nextItem(name, url, rating, breedability)) {
writer.writeStartElement("item");
writer.writeStartElement("name");
writer.writeCharacters(name.replace("&", "&"));
writer.writeEndElement();
writer.writeStartElement("url");
writer.writeCharacters(url.replace("&", "&"));
writer.writeEndElement();
writer.writeStartElement("rating");
writer.writeCharacters(QString("%1").arg(rating)+"\n");
writer.writeEndElement();
writer.writeStartElement("breedability");
writer.writeCharacters(QString("%1").arg(breedability)+"\n");
writer.writeEndElement();
writer.writeEndElement();
}
writer.writeEndElement();
writer.writeEndDocument();
return;
}
/// @idea Instead of templates, allow subclassing of the playlist handler
#if 0
virtual void QXmlPlaylistHandler::readPresetItem(const QString & url, int rating) {}
virtual bool QXmlPlaylistHandler::nextPresetItem(QString & url, int & rating) {
return false;
}
#endif
#endif
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