mirror of
https://github.com/tumic0/GPXSee.git
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374 lines
10 KiB
C++
374 lines
10 KiB
C++
#include <QXmlStreamReader>
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#include <QFile>
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#include <QFileInfo>
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#include <QEventLoop>
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#include <QTextStream>
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#include <QStringList>
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#include <QtAlgorithms>
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#include <QXmlStreamReader>
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#include "downloader.h"
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#include "pcs.h"
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#include "crs.h"
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#include "wmts.h"
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static void skipParentElement(QXmlStreamReader &reader)
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{
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while (reader.readNextStartElement())
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reader.skipCurrentElement();
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}
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WMTS::TileMatrix WMTS::tileMatrix(QXmlStreamReader &reader)
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{
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TileMatrix matrix;
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while (reader.readNextStartElement()) {
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if (reader.name() == "Identifier")
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matrix.id = reader.readElementText();
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else if (reader.name() == "ScaleDenominator")
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matrix.scaleDenominator = reader.readElementText().toDouble();
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else if (reader.name() == "TopLeftCorner") {
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QString str = reader.readElementText();
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QTextStream ts(&str);
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ts >> matrix.topLeft.rx() >> matrix.topLeft.ry();
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} else if (reader.name() == "TileWidth")
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matrix.tile.setWidth(reader.readElementText().toInt());
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else if (reader.name() == "TileHeight")
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matrix.tile.setHeight(reader.readElementText().toInt());
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else if (reader.name() == "MatrixWidth")
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matrix.matrix.setWidth(reader.readElementText().toInt());
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else if (reader.name() == "MatrixHeight")
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matrix.matrix.setHeight(reader.readElementText().toInt());
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else
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reader.skipCurrentElement();
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}
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if (!matrix.isValid())
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reader.raiseError("Invalid TileMatrix definition");
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return matrix;
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}
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void WMTS::tileMatrixSet(QXmlStreamReader &reader, CTX &ctx)
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{
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while (reader.readNextStartElement()) {
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if (reader.name() == "Identifier") {
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if (reader.readElementText() != ctx.setup.set()) {
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skipParentElement(reader);
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return;
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}
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} else if (reader.name() == "SupportedCRS")
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ctx.crs = reader.readElementText();
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else if (reader.name() == "TileMatrix")
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ctx.matrixes.insert(tileMatrix(reader));
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else
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reader.skipCurrentElement();
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}
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}
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WMTS::MatrixLimits WMTS::tileMatrixLimits(QXmlStreamReader &reader)
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{
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MatrixLimits limits;
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while (reader.readNextStartElement()) {
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if (reader.name() == "TileMatrix")
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limits.id = reader.readElementText();
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else if (reader.name() == "MinTileRow")
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limits.rect.setTop(reader.readElementText().toInt());
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else if (reader.name() == "MaxTileRow")
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limits.rect.setBottom(reader.readElementText().toInt());
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else if (reader.name() == "MinTileCol")
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limits.rect.setLeft(reader.readElementText().toInt());
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else if (reader.name() == "MaxTileCol")
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limits.rect.setRight(reader.readElementText().toInt());
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else
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reader.skipCurrentElement();
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}
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if (!limits.isValid())
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reader.raiseError("Invalid TileMatrixLimits definition");
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return limits;
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}
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QSet<WMTS::MatrixLimits> WMTS::tileMatrixSetLimits(QXmlStreamReader &reader)
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{
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QSet<MatrixLimits> limits;
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while (reader.readNextStartElement()) {
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if (reader.name() == "TileMatrixLimits")
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limits.insert(tileMatrixLimits(reader));
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else
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reader.skipCurrentElement();
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}
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return limits;
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}
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void WMTS::tileMatrixSetLink(QXmlStreamReader &reader, CTX &ctx)
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{
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while (reader.readNextStartElement()) {
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if (reader.name() == "TileMatrixSet") {
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if (reader.readElementText() == ctx.setup.set())
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ctx.hasSet = true;
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else {
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skipParentElement(reader);
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return;
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}
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} else if (reader.name() == "TileMatrixSetLimits")
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ctx.limits = tileMatrixSetLimits(reader);
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else
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reader.skipCurrentElement();
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}
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}
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RectC WMTS::wgs84BoundingBox(QXmlStreamReader &reader)
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{
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Coordinates topLeft, bottomRight;
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while (reader.readNextStartElement()) {
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if (reader.name() == "LowerCorner") {
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QString str = reader.readElementText();
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QTextStream(&str) >> topLeft.rlon() >> bottomRight.rlat();
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} else if (reader.name() == "UpperCorner") {
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QString str = reader.readElementText();
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QTextStream(&str) >> bottomRight.rlon() >> topLeft.rlat();
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} else
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reader.skipCurrentElement();
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}
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return RectC(topLeft, bottomRight);
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}
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QString WMTS::style(QXmlStreamReader &reader)
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{
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QString id;
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while (reader.readNextStartElement()) {
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if (reader.name() == "Identifier")
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id = reader.readElementText();
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else
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reader.skipCurrentElement();
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}
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return id;
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}
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void WMTS::layer(QXmlStreamReader &reader, CTX &ctx)
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{
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while (reader.readNextStartElement()) {
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if (reader.name() == "Identifier") {
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if (reader.readElementText() == ctx.setup.layer())
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ctx.hasLayer = true;
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else {
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skipParentElement(reader);
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return;
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}
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} else if (reader.name() == "TileMatrixSetLink")
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tileMatrixSetLink(reader, ctx);
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else if (reader.name() == "WGS84BoundingBox")
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_bounds = wgs84BoundingBox(reader);
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else if (reader.name() == "ResourceURL") {
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const QXmlStreamAttributes &attr = reader.attributes();
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if (attr.value("resourceType") == "tile" && ctx.setup.rest())
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_tileUrl = attr.value("template").toString();
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reader.skipCurrentElement();
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} else if (reader.name() == "Style") {
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const QXmlStreamAttributes &attr = reader.attributes();
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bool isDefault = (attr.value("isDefault") == "true");
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QString s = style(reader);
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if (isDefault)
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ctx.defaultStyle = s;
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if (s == ctx.setup.style())
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ctx.hasStyle = true;
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} else if (reader.name() == "Format") {
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if (reader.readElementText() == ctx.setup.format())
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ctx.hasFormat = true;
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} else
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reader.skipCurrentElement();
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}
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}
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void WMTS::contents(QXmlStreamReader &reader, CTX &ctx)
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{
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while (reader.readNextStartElement()) {
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if (reader.name() == "TileMatrixSet")
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tileMatrixSet(reader, ctx);
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else if (reader.name() == "Layer")
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layer(reader, ctx);
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else
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reader.skipCurrentElement();
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}
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}
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void WMTS::capabilities(QXmlStreamReader &reader, CTX &ctx)
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{
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while (reader.readNextStartElement()) {
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if (reader.name() == "Contents")
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contents(reader, ctx);
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else
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reader.skipCurrentElement();
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}
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}
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void WMTS::createZooms(const CTX &ctx)
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{
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for (QSet<TileMatrix>::const_iterator mi = ctx.matrixes.constBegin();
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mi != ctx.matrixes.constEnd(); ++mi) {
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QSet<MatrixLimits>::const_iterator li = ctx.limits.find(
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MatrixLimits(mi->id));
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if (!ctx.limits.isEmpty() && li == ctx.limits.constEnd())
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continue;
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_zooms.append(Zoom(mi->id, mi->scaleDenominator, mi->topLeft, mi->tile,
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mi->matrix, li == ctx.limits.constEnd() ? QRect() : li->rect));
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}
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qSort(_zooms);
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}
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bool WMTS::parseCapabilities(const QString &path, CTX &ctx)
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{
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QFile file(path);
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QXmlStreamReader reader;
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if (!file.open(QFile::ReadOnly | QFile::Text)) {
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_errorString = file.errorString();
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return false;
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}
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reader.setDevice(&file);
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if (reader.readNextStartElement()) {
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if (reader.name() == "Capabilities")
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capabilities(reader, ctx);
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else
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reader.raiseError("Not a Capabilities XML file");
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}
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if (reader.error()) {
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_errorString = QString("%1:%2: %3").arg(path).arg(reader.lineNumber())
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.arg(reader.errorString());
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return false;
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}
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if (!ctx.hasLayer) {
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_errorString = ctx.setup.layer() + ": layer not provided";
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return false;
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}
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if (!ctx.hasStyle && !ctx.setup.style().isEmpty()) {
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_errorString = ctx.setup.style() + ": style not provided";
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return false;
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}
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if (!ctx.hasStyle && ctx.setup.style().isEmpty()
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&& ctx.defaultStyle.isEmpty()) {
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_errorString = "Default style not provided";
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return false;
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}
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if (!ctx.setup.rest() && !ctx.hasFormat) {
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_errorString = ctx.setup.format() + ": format not provided";
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return false;
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}
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if (!ctx.hasSet) {
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_errorString = ctx.setup.set() + ": set not provided";
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return false;
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}
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if (ctx.crs.isNull()) {
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_errorString = "Missing CRS definition";
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return false;
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}
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_projection = CRS::projection(ctx.crs);
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if (!_projection.isValid()) {
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_errorString = ctx.crs + ": unknown CRS";
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return false;
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}
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createZooms(ctx);
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if (_zooms.isEmpty()) {
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_errorString = "No usable tile matrix found";
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return false;
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}
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if (ctx.setup.rest() && _tileUrl.isNull()) {
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_errorString = "Missing tile URL template";
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return false;
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}
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return true;
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}
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bool WMTS::downloadCapabilities(const QString &url, const QString &file,
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const Authorization &authorization)
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{
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Downloader d;
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QList<Download> dl;
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dl.append(Download(url, file));
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QEventLoop wait;
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QObject::connect(&d, SIGNAL(finished()), &wait, SLOT(quit()));
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if (d.get(dl, authorization))
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wait.exec();
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if (!QFileInfo(file).exists()) {
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_errorString = "Error downloading capabilities XML file";
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return false;
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}
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return true;
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}
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WMTS::WMTS(const QString &file, const WMTS::Setup &setup) : _valid(false)
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{
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QUrl url(setup.rest() ? setup.url() : QString(
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"%1%2service=WMTS&Version=1.0.0&request=GetCapabilities").arg(setup.url(),
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setup.url().contains('?') ? "&" : "?"));
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if (!url.isLocalFile() && !QFileInfo(file).exists())
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if (!downloadCapabilities(url.toString(), file, setup.authorization()))
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return;
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CTX ctx(setup);
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if (!parseCapabilities(url.isLocalFile() ? url.toLocalFile() : file, ctx))
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return;
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QString style = setup.style().isEmpty() ? ctx.defaultStyle : setup.style();
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if (!setup.rest()) {
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_tileUrl = QString("%1%2service=WMTS&Version=1.0.0&request=GetTile"
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"&Format=%3&Layer=%4&Style=%5&TileMatrixSet=%6&TileMatrix=$z"
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"&TileRow=$y&TileCol=$x").arg(setup.url(),
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setup.url().contains('?') ? "&" : "?" , setup.format(),
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setup.layer(), style, setup.set());
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for (int i = 0; i < setup.dimensions().size(); i++) {
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const KV &dim = setup.dimensions().at(i);
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_tileUrl.append(QString("&%1=%2").arg(dim.key(), dim.value()));
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}
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} else {
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_tileUrl.replace("{Style}", style, Qt::CaseInsensitive);
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_tileUrl.replace("{TileMatrixSet}", setup.set(), Qt::CaseInsensitive);
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_tileUrl.replace("{TileMatrix}", "$z", Qt::CaseInsensitive);
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_tileUrl.replace("{TileRow}", "$y", Qt::CaseInsensitive);
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_tileUrl.replace("{TileCol}", "$x", Qt::CaseInsensitive);
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for (int i = 0; i < setup.dimensions().size(); i++) {
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const KV &dim = setup.dimensions().at(i);
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_tileUrl.replace(QString("{%1}").arg(dim.key()), dim.value(),
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Qt::CaseInsensitive);
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}
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}
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_valid = true;
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}
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#ifndef QT_NO_DEBUG
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QDebug operator<<(QDebug dbg, const WMTS::Setup &setup)
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{
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dbg.nospace() << "Setup(" << setup.url() << ", " << setup.layer() << ", "
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<< setup.set() << ", " << setup.style() << ", " << setup.format() << ", "
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<< setup.rest() << ")";
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return dbg.space();
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}
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QDebug operator<<(QDebug dbg, const WMTS::Zoom &zoom)
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{
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dbg.nospace() << "Zoom(" << zoom.id() << ", " << zoom.scaleDenominator()
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<< ", " << zoom.topLeft() << ", " << zoom.tile() << ", " << zoom.matrix()
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<< ", " << zoom.limits() << ")";
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return dbg.space();
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}
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#endif // QT_NO_DEBUG
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