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Properly handle WMTS TileMatrixLimits and default style

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This commit is contained in:
Martin Tůma 2018-10-15 00:20:20 +02:00
parent 8f4ce8d38c
commit 4a612f12bb
2 changed files with 81 additions and 81 deletions
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151
src/map/wmts.cpp
View File

@ -12,6 +12,12 @@
#include "wmts.h"
static void skipParentElement(QXmlStreamReader &reader)
{
while (reader.readNextStartElement())
reader.skipCurrentElement();
}
WMTS::TileMatrix WMTS::tileMatrix(QXmlStreamReader &reader)
{
TileMatrix matrix;
@ -45,24 +51,19 @@ WMTS::TileMatrix WMTS::tileMatrix(QXmlStreamReader &reader)
void WMTS::tileMatrixSet(QXmlStreamReader &reader, CTX &ctx)
{
QString id, crs;
QSet<TileMatrix> matrixes;
while (reader.readNextStartElement()) {
if (reader.name() == "Identifier")
id = reader.readElementText();
else if (reader.name() == "SupportedCRS")
crs = reader.readElementText();
if (reader.name() == "Identifier") {
if (reader.readElementText() != ctx.setup.set()) {
skipParentElement(reader);
return;
}
} else if (reader.name() == "SupportedCRS")
ctx.crs = reader.readElementText();
else if (reader.name() == "TileMatrix")
matrixes.insert(tileMatrix(reader));
ctx.matrixes.insert(tileMatrix(reader));
else
reader.skipCurrentElement();
}
if (id == ctx.setup.set()) {
ctx.crs = crs;
_matrixes = matrixes;
}
}
WMTS::MatrixLimits WMTS::tileMatrixLimits(QXmlStreamReader &reader)
@ -106,22 +107,19 @@ QSet<WMTS::MatrixLimits> WMTS::tileMatrixSetLimits(QXmlStreamReader &reader)
void WMTS::tileMatrixSetLink(QXmlStreamReader &reader, CTX &ctx)
{
QString id;
QSet<MatrixLimits> limits;
while (reader.readNextStartElement()) {
if (reader.name() == "TileMatrixSet")
id = reader.readElementText();
else if (reader.name() == "TileMatrixSetLimits")
limits = tileMatrixSetLimits(reader);
if (reader.name() == "TileMatrixSet") {
if (reader.readElementText() == ctx.setup.set())
ctx.hasSet = true;
else {
skipParentElement(reader);
return;
}
} else if (reader.name() == "TileMatrixSetLimits")
ctx.limits = tileMatrixSetLimits(reader);
else
reader.skipCurrentElement();
}
if (id == ctx.setup.set()) {
ctx.hasSet = true;
_limits = limits;
}
}
RectC WMTS::wgs84BoundingBox(QXmlStreamReader &reader)
@ -158,40 +156,37 @@ QString WMTS::style(QXmlStreamReader &reader)
void WMTS::layer(QXmlStreamReader &reader, CTX &ctx)
{
QString id, tpl;
RectC bounds;
QStringList formats, styles;
while (reader.readNextStartElement()) {
if (reader.name() == "Identifier")
id = reader.readElementText();
else if (reader.name() == "TileMatrixSetLink")
if (reader.name() == "Identifier") {
if (reader.readElementText() == ctx.setup.layer())
ctx.hasLayer = true;
else {
skipParentElement(reader);
return;
}
} else if (reader.name() == "TileMatrixSetLink")
tileMatrixSetLink(reader, ctx);
else if (reader.name() == "WGS84BoundingBox")
bounds = wgs84BoundingBox(reader);
_bounds = wgs84BoundingBox(reader);
else if (reader.name() == "ResourceURL") {
const QXmlStreamAttributes &attr = reader.attributes();
if (attr.value("resourceType") == "tile")
tpl = attr.value("template").toString();
if (attr.value("resourceType") == "tile" && ctx.setup.rest())
_tileUrl = attr.value("template").toString();
reader.skipCurrentElement();
} else if (reader.name() == "Style")
styles.append(style(reader));
else if (reader.name() == "Format")
formats.append(reader.readElementText());
else
} else if (reader.name() == "Style") {
const QXmlStreamAttributes &attr = reader.attributes();
bool isDefault = (attr.value("isDefault") == "true");
QString s = style(reader);
if (isDefault)
ctx.defaultStyle = s;
if (!s.isEmpty() && s == ctx.setup.style())
ctx.hasStyle = true;
} else if (reader.name() == "Format") {
if (reader.readElementText() == ctx.setup.format())
ctx.hasFormat = true;
} else
reader.skipCurrentElement();
}
if (id == ctx.setup.layer()) {
ctx.hasLayer = true;
_bounds = bounds;
if (ctx.setup.rest())
_tileUrl = tpl;
if (styles.contains(ctx.setup.style()) || ctx.setup.style().isEmpty())
ctx.hasStyle = true;
if (formats.contains(ctx.setup.format()))
ctx.hasFormat = true;
}
}
void WMTS::contents(QXmlStreamReader &reader, CTX &ctx)
@ -216,10 +211,24 @@ void WMTS::capabilities(QXmlStreamReader &reader, CTX &ctx)
}
}
bool WMTS::parseCapabilities(const QString &path, const Setup &setup)
void WMTS::createZooms(const CTX &ctx)
{
for (QSet<TileMatrix>::const_iterator mi = ctx.matrixes.constBegin();
mi != ctx.matrixes.constEnd(); ++mi) {
QSet<MatrixLimits>::const_iterator li = ctx.limits.find(
MatrixLimits(mi->id));
if (!ctx.limits.isEmpty() && li == ctx.limits.constEnd())
continue;
_zooms.append(Zoom(mi->id, mi->scaleDenominator, mi->topLeft, mi->tile,
mi->matrix, li == ctx.limits.constEnd() ? QRect() : li->rect));
}
qSort(_zooms);
}
bool WMTS::parseCapabilities(const QString &path, CTX &ctx)
{
QFile file(path);
CTX ctx(setup);
QXmlStreamReader reader;
if (!file.open(QFile::ReadOnly | QFile::Text)) {
@ -240,14 +249,20 @@ bool WMTS::parseCapabilities(const QString &path, const Setup &setup)
return false;
}
createZooms(ctx);
if (!ctx.hasLayer) {
_errorString = ctx.setup.layer() + ": layer not provided";
return false;
}
if (!ctx.hasStyle) {
if (!ctx.hasStyle && !ctx.setup.style().isEmpty()) {
_errorString = ctx.setup.style() + ": style not provided";
return false;
}
if (ctx.setup.style().isEmpty() && ctx.defaultStyle.isEmpty()) {
_errorString = "Default style not provided";
return false;
}
if (!ctx.setup.rest() && !ctx.hasFormat) {
_errorString = ctx.setup.format() + ": format not provided";
return false;
@ -265,7 +280,7 @@ bool WMTS::parseCapabilities(const QString &path, const Setup &setup)
_errorString = ctx.crs + ": unknown CRS";
return false;
}
if (_matrixes.isEmpty()) {
if (ctx.matrixes.isEmpty()) {
_errorString = "No usable tile matrix found";
return false;
}
@ -307,10 +322,12 @@ WMTS::WMTS(const QString &file, const WMTS::Setup &setup) : _valid(false)
if (!url.isLocalFile() && !QFileInfo(file).exists())
if (!downloadCapabilities(url.toString(), file, setup.authorization()))
return;
if (!parseCapabilities(url.isLocalFile() ? url.toLocalFile() : file, setup))
CTX ctx(setup);
if (!parseCapabilities(url.isLocalFile() ? url.toLocalFile() : file, ctx))
return;
QString style = setup.style().isEmpty() ? "default" : setup.style();
QString style = setup.style().isEmpty() ? ctx.defaultStyle : setup.style();
if (!setup.rest()) {
_tileUrl = QString("%1%2service=WMTS&Version=1.0.0&request=GetTile"
"&Format=%3&Layer=%4&Style=%5&TileMatrixSet=%6&TileMatrix=$z"
@ -337,26 +354,6 @@ WMTS::WMTS(const QString &file, const WMTS::Setup &setup) : _valid(false)
_valid = true;
}
QList<WMTS::Zoom> WMTS::zooms() const
{
QList<Zoom> zooms;
QSet<TileMatrix>::const_iterator mi;
QSet<MatrixLimits>::const_iterator li;
for (mi = _matrixes.constBegin(); mi != _matrixes.constEnd(); ++mi) {
if ((li = _limits.find(MatrixLimits(mi->id))) == _limits.constEnd())
zooms.append(Zoom(mi->id, mi->scaleDenominator, mi->topLeft,
mi->tile, mi->matrix, QRect()));
else
zooms.append(Zoom(mi->id, mi->scaleDenominator, mi->topLeft,
mi->tile, mi->matrix, li->rect));
}
qSort(zooms);
return zooms;
}
#ifndef QT_NO_DEBUG
QDebug operator<<(QDebug dbg, const WMTS::Setup &setup)
{

11
src/map/wmts.h
View File

@ -80,7 +80,7 @@ public:
WMTS(const QString &path, const Setup &setup);
const RectC &bounds() const {return _bounds;}
QList<Zoom> zooms() const;
const QList<Zoom> &zooms() const {return _zooms;}
const Projection &projection() const {return _projection;}
const QString &tileUrl() const {return _tileUrl;}
@ -117,7 +117,10 @@ private:
struct CTX {
const Setup &setup;
QSet<TileMatrix> matrixes;
QSet<MatrixLimits> limits;
QString crs;
QString defaultStyle;
bool hasLayer;
bool hasStyle;
bool hasFormat;
@ -137,12 +140,12 @@ private:
void layer(QXmlStreamReader &reader, CTX &ctx);
void contents(QXmlStreamReader &reader, CTX &ctx);
void capabilities(QXmlStreamReader &reader, CTX &ctx);
bool parseCapabilities(const QString &path, const Setup &setup);
bool parseCapabilities(const QString &path, CTX &ctx);
bool downloadCapabilities(const QString &url, const QString &file,
const Authorization &authorization);
void createZooms(const CTX &ctx);
QSet<TileMatrix> _matrixes;
QSet<MatrixLimits> _limits;
QList<Zoom> _zooms;
RectC _bounds;
Projection _projection;
QString _tileUrl;