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355 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 2023-05-15
* Description : geolocation engine based on Marble.
* (c) 2007-2022 Marble Team
* https://invent.kde.org/education/marble/-/raw/master/data/credits_authors.html
*
* SPDX-FileCopyrightText: 2023-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* ============================================================ */
#include "OsmParser.h"
// Qt includes
#include <QColor>
#include <QFile>
#include <QFileInfo>
#include <QBuffer>
#include <QSet>
// KDE includes
#include <klocalizedstring.h>
// Local includes
#include "OsmElementDictionary.h"
#include "OsmObjectManager.h"
#include "GeoDataDocument.h"
#include "GeoDataPoint.h"
#include "GeoDataStyle.h"
#include "GeoDataPolyStyle.h"
#include "MarbleZipReader.h"
#include "o5mreader.h"
#include "OsmPbfParser.h"
namespace Marble
{
GeoDataDocument* OsmParser::parse(const QString& filename, QString& error)
{
QFileInfo const fileInfo(filename);
if (!fileInfo.exists() || !fileInfo.isReadable())
{
error = QString::fromUtf8("Cannot read file %1").arg(filename);
return nullptr;
}
if (fileInfo.suffix() == QLatin1String("o5m"))
{
return parseO5m(filename, error);
}
else if (filename.endsWith(QLatin1String(".osm.pbf")))
{
return parseOsmPbf(filename, error);
}
else
{
return parseXml(filename, error);
}
}
GeoDataDocument* OsmParser::parseO5m(const QString& filename, QString& error)
{
O5mreader* reader;
O5mreaderDataset data;
O5mreaderIterateRet outerState, innerState;
char* key, *value;
// share string data on the heap at least for this file
QSet<QString> stringPool;
OsmNodes nodes;
OsmWays ways;
OsmRelations relations;
QHash<uint8_t, QString> relationTypes;
relationTypes[O5MREADER_DS_NODE] = QStringLiteral("node");
relationTypes[O5MREADER_DS_WAY] = QStringLiteral("way");
relationTypes[O5MREADER_DS_REL] = QStringLiteral("relation");
auto file = fopen(filename.toStdString().c_str(), "rb");
o5mreader_open(&reader, file);
while ((outerState = o5mreader_iterateDataSet(reader, &data)) == O5MREADER_ITERATE_RET_NEXT)
{
switch (data.type)
{
case O5MREADER_DS_NODE:
{
OsmNode& node = nodes[data.id];
node.osmData().setId(data.id);
node.setCoordinates(GeoDataCoordinates(data.lon * 1.0e-7, data.lat * 1.0e-7,
0.0, GeoDataCoordinates::Degree));
while ((innerState = o5mreader_iterateTags(reader, &key, &value)) == O5MREADER_ITERATE_RET_NEXT)
{
const QString keyString = *stringPool.insert(QString::fromUtf8(key));
const QString valueString = *stringPool.insert(QString::fromUtf8(value));
node.osmData().addTag(keyString, valueString);
}
}
break;
case O5MREADER_DS_WAY:
{
OsmWay& way = ways[data.id];
way.osmData().setId(data.id);
uint64_t nodeId;
while ((innerState = o5mreader_iterateNds(reader, &nodeId)) == O5MREADER_ITERATE_RET_NEXT)
{
way.addReference(nodeId);
}
while ((innerState = o5mreader_iterateTags(reader, &key, &value)) == O5MREADER_ITERATE_RET_NEXT)
{
const QString keyString = *stringPool.insert(QString::fromUtf8(key));
const QString valueString = *stringPool.insert(QString::fromUtf8(value));
way.osmData().addTag(keyString, valueString);
}
}
break;
case O5MREADER_DS_REL:
{
OsmRelation& relation = relations[data.id];
relation.osmData().setId(data.id);
char* role;
uint8_t type;
uint64_t refId;
while ((innerState = o5mreader_iterateRefs(reader, &refId, &type, &role)) == O5MREADER_ITERATE_RET_NEXT)
{
const QString roleString = *stringPool.insert(QString::fromUtf8(role));
relation.addMember(refId, roleString, relationTypes[type]);
}
while ((innerState = o5mreader_iterateTags(reader, &key, &value)) == O5MREADER_ITERATE_RET_NEXT)
{
const QString keyString = *stringPool.insert(QString::fromUtf8(key));
const QString valueString = *stringPool.insert(QString::fromUtf8(value));
relation.osmData().addTag(keyString, valueString);
}
}
break;
}
}
fclose(file);
error = QString::fromUtf8(reader->errMsg);
o5mreader_close(reader);
return createDocument(nodes, ways, relations);
}
GeoDataDocument* OsmParser::parseXml(const QString& filename, QString& error)
{
QXmlStreamReader parser;
QFile file;
QBuffer buffer;
QFileInfo fileInfo(filename);
if (fileInfo.completeSuffix() == QLatin1String("osm.zip"))
{
MarbleZipReader zipReader(filename);
if (zipReader.fileInfoList().size() != 1)
{
int const fileNumber = zipReader.fileInfoList().size();
error = QStringLiteral("Unexpected number of files (%1) in %2").arg(fileNumber).arg(filename);
return nullptr;
}
QByteArray const data = zipReader.fileData(zipReader.fileInfoList().first().filePath);
buffer.setData(data);
buffer.open(QBuffer::ReadOnly);
parser.setDevice(&buffer);
}
else
{
file.setFileName(filename);
if (!file.open(QFile::ReadOnly))
{
error = QStringLiteral("Cannot open file %1").arg(filename);
return nullptr;
}
parser.setDevice(&file);
}
OsmPlacemarkData* osmData(nullptr);
QString parentTag;
qint64 parentId(0);
// share string data on the heap at least for this file
QSet<QString> stringPool;
OsmNodes m_nodes;
OsmWays m_ways;
OsmRelations m_relations;
while (!parser.atEnd())
{
parser.readNext();
if (!parser.isStartElement())
{
continue;
}
QStringView const tagName = parser.name();
if (tagName == QString::fromUtf8(osm::osmTag_node) || tagName == QString::fromUtf8(osm::osmTag_way) || tagName == QString::fromUtf8(osm::osmTag_relation))
{
parentTag = parser.name().toString();
parentId = parser.attributes().value(QLatin1String("id")).toLongLong();
if (tagName == QString::fromUtf8(osm::osmTag_node))
{
m_nodes[parentId].osmData() = OsmPlacemarkData::fromParserAttributes(parser.attributes());
m_nodes[parentId].parseCoordinates(parser.attributes());
osmData = &m_nodes[parentId].osmData();
}
else if (tagName == QString::fromUtf8(osm::osmTag_way))
{
m_ways[parentId].osmData() = OsmPlacemarkData::fromParserAttributes(parser.attributes());
osmData = &m_ways[parentId].osmData();
}
else
{
Q_ASSERT(tagName == QString::fromUtf8(osm::osmTag_relation));
m_relations[parentId].osmData() = OsmPlacemarkData::fromParserAttributes(parser.attributes());
osmData = &m_relations[parentId].osmData();
}
}
else if (osmData && tagName == QString::fromUtf8(osm::osmTag_tag))
{
const QXmlStreamAttributes& attributes = parser.attributes();
const QString keyString = *stringPool.insert(attributes.value(QLatin1String("k")).toString());
const QString valueString = *stringPool.insert(attributes.value(QLatin1String("v")).toString());
osmData->addTag(keyString, valueString);
}
else if (tagName == QString::fromUtf8(osm::osmTag_nd) && parentTag == QString::fromUtf8(osm::osmTag_way))
{
m_ways[parentId].addReference(parser.attributes().value(QLatin1String("ref")).toLongLong());
}
else if (tagName == QString::fromUtf8(osm::osmTag_member) && parentTag == QString::fromUtf8(osm::osmTag_relation))
{
m_relations[parentId].parseMember(parser.attributes());
} // other tags like osm, bounds ignored
}
if (parser.hasError())
{
error = parser.errorString();
return nullptr;
}
return createDocument(m_nodes, m_ways, m_relations);
}
GeoDataDocument* OsmParser::parseOsmPbf(const QString& filename, QString& error)
{
QFile f(filename);
if (!f.open(QFile::ReadOnly))
{
error = f.errorString();
return nullptr;
}
const auto data = f.map(0, f.size());
OsmPbfParser p;
p.parse(data, f.size());
return createDocument(p.m_nodes, p.m_ways, p.m_relations);
}
GeoDataDocument* OsmParser::createDocument(OsmNodes& nodes, OsmWays& ways, OsmRelations& relations)<--- Parameter 'relations' can be declared as reference to const
{
GeoDataDocument* document = new GeoDataDocument;
GeoDataPolyStyle backgroundPolyStyle;
backgroundPolyStyle.setFill(true);
backgroundPolyStyle.setOutline(false);
backgroundPolyStyle.setColor(QStringLiteral("#f1eee8"));
GeoDataStyle::Ptr backgroundStyle(new GeoDataStyle);
backgroundStyle->setPolyStyle(backgroundPolyStyle);
backgroundStyle->setId(QStringLiteral("background"));
document->addStyle(backgroundStyle);
QSet<qint64> usedNodes, usedWays;
for (auto const& relation : relations)
{
relation.createMultipolygon(document, ways, nodes, usedNodes, usedWays);
}
for (auto id : usedWays)
{
ways.remove(id);
}
QHash<qint64, GeoDataPlacemark*> placemarks;
for (auto iter = ways.constBegin(), end = ways.constEnd(); iter != end; ++iter)
{
auto placemark = iter.value().create(nodes, usedNodes);
if (placemark)
{
document->append(placemark);
placemarks[placemark->osmData().oid()] = placemark;
}
}
for (auto id : usedNodes)
{
if (nodes[id].osmData().isEmpty())
{
nodes.remove(id);
}
}
for (auto const& node : nodes)
{
auto placemark = node.create();
if (placemark)
{
document->append(placemark);
placemarks[placemark->osmData().oid()] = placemark;
}
}
for (auto const& relation : relations)
{
relation.createRelation(document, placemarks);
}
return document;
}
} // namespace Marble
|