KmlHandler.cpp

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/*
    This file is part of Rocs.
    Copyright 2010  Tomaz Canabrava <tomaz.canabrava@gmail.com>
    Copyright 2010  Wagner Reck <wagner.reck@gmail.com>
    Copyright 2012  Andreas Cord-Landwehr <cola@uni-paderborn.de>

    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, see <http://www.gnu.org/licenses/>.
*/

#include "KmlHandler.h"
#include "DataStructure.h"
#include "Data.h"
#include <KDebug>


KmlHandler::KmlHandler(DataStructurePtr doc): QXmlDefaultHandler(), m_graph(doc)
{

}


KmlHandler::~KmlHandler()
{

}


bool KmlHandler::characters(const QString& str)
{
    currentText += str;
    return true;
}


bool KmlHandler::endElement(const QString& /*namespaceURI*/, const QString& /*localName*/, const QString& qName)
{
    DataPtr n;
    if (qName == "coordinates") {
        m_coordinates = currentText;
    } else if (qName == "name") {
        m_name = currentText;
    } else if (qName == "description") {
        m_description = currentText;
    } else if (qName == "Placemark"  && !m_coordinates.isEmpty()) {
        if (m_name.isEmpty()) {
            m_name = QString::number(qrand());
        }
        n = m_graph->createData(m_name, 0);
        QStringList values = m_coordinates.split(',');
        if (values.count() >= 2) {

            n->setX(values.at(0).toDouble());
            n->addDynamicProperty("Longitude", values.at(0).toDouble());
            n->setY(values.at(1).toDouble());
            n->addDynamicProperty("Latitude", values.at(1).toDouble());
            if (values.count() > 2) {
                n->addDynamicProperty("Elevation", values.at(2).toDouble());
            }
        }
        if (!m_description.isEmpty()) {
            n->addDynamicProperty("Description", m_description);
        }
        m_coordinates.clear();
        m_description.clear();
        m_name.clear();
    }
    if (qName == "LineString" && !m_coordinates.isEmpty()) {
        QStringList points = m_coordinates.split('\n');
        int count = 0;
        DataPtr n_old;
        foreach(const QString& point, points) {
            count++;

            QStringList values = point.split(',');
            if (values.count() >= 2) {
                n = m_graph->createData(m_name + '_' + QString::number(count + 1), 0);

                n->setX(values.at(0).toDouble());
                n->addDynamicProperty("Longitude", values.at(0).toDouble());
                n->setY(values.at(1).toDouble());
                n->addDynamicProperty("Latitude", values.at(1).toDouble());
                if (values.count() > 2) {
                    n->addDynamicProperty("Elevation", values.at(2).toDouble());
                }
            }
            if (!m_description.isEmpty()) {
                n->addDynamicProperty("Description", m_description);
            }
            if (n_old) {
                m_graph->createPointer(n_old, n, 0);
            }
            n_old = n;
        }
        m_coordinates.clear();
        m_description.clear();
        m_name.clear();
    }
    kDebug() << qName;
    return true;
}


QString KmlHandler::errorString() const
{
    return QXmlDefaultHandler::errorString();
}


bool KmlHandler::fatalError(const QXmlParseException& exception)
{
    return QXmlDefaultHandler::fatalError(exception);
}


bool KmlHandler::startElement(const QString& /*namespaceURI*/, const QString& /*localName*/, const QString& /*qName*/, const QXmlAttributes& /*attributes*/)
{
    currentText.clear();
    return true;
}