From b99def1b300cef4fc5843a86c8b215c5eb8a5d7f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Mon, 24 Oct 2016 20:00:29 +0200
Subject: [PATCH] Added support for KML files Fixed some minor parser issues

---
 src/kmlparser.cpp | 177 ++++++++++++++++++++++++++++++++++++++++++++++
 src/kmlparser.h   |  37 ++++++++++
 2 files changed, 214 insertions(+)
 create mode 100644 src/kmlparser.cpp
 create mode 100644 src/kmlparser.h

diff --git a/src/kmlparser.cpp b/src/kmlparser.cpp
new file mode 100644
index 00000000..78c7a2f8
--- /dev/null
+++ b/src/kmlparser.cpp
@@ -0,0 +1,177 @@
+#include "kmlparser.h"
+
+
+bool KMLParser::pointCoordinates()
+{
+	QString data = _reader.readElementText();
+	const QChar *sp, *ep, *cp, *vp;
+	int c = 0;
+	qreal val[3];
+	bool res;
+
+
+	sp = data.constData();
+	ep = sp + data.size();
+
+	for (cp = sp, vp = sp; cp <= ep; cp++) {
+		if (*cp == ',' || cp->isNull()) {
+			if (c > 2)
+				return false;
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
+			val[c] = QString(vp, cp - vp).toDouble(&res);
+#else // QT_VERSION < 5
+			val[c] = QStringRef(&data, vp - sp, cp - vp).toDouble(&res);
+#endif // QT_VERSION < 5
+			if (!res)
+				return false;
+
+			if (c == 2) {
+				Waypoint w(Coordinates(val[0], val[1]));
+				w.setElevation(val[2]);
+				_waypoints.append(w);
+			}
+
+			c++;
+			vp = cp + 1;
+		}
+	}
+
+	return true;
+}
+
+bool KMLParser::lineCoordinates()
+{
+	QString data = _reader.readElementText();
+	const QChar *sp, *ep, *cp, *vp;
+	int c = 0;
+	qreal val[3];
+	bool res;
+
+
+	sp = data.constData();
+	ep = sp + data.size();
+
+	for (cp = sp, vp = sp; cp <= ep; cp++) {
+		if (*cp == ',' || cp->isSpace() || cp->isNull()) {
+			if (c > 2)
+				return false;
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
+			val[c] = QString(vp, cp - vp).toDouble(&res);
+#else // QT_VERSION < 5
+			val[c] = QStringRef(&data, vp - sp, cp - vp).toDouble(&res);
+#endif // QT_VERSION < 5
+			if (!res)
+				return false;
+
+			if (c == 2) {
+				Waypoint w(Coordinates(val[0], val[1]));
+				w.setElevation(val[2]);
+				_route->append(w);
+			}
+
+			c++;
+			vp = cp + 1;
+		}
+		if (cp->isSpace()) {
+			if (c < 3)
+				return false;
+			while (cp->isSpace())
+				cp++;
+			c = 0;
+		}
+	}
+
+	return true;
+}
+
+void KMLParser::lineString()
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "coordinates") {
+			_routes.append(QVector<Waypoint>());
+			_route = &_routes.back();
+			if (!lineCoordinates())
+				_reader.raiseError("Invalid coordinates.");
+		} else
+			_reader.skipCurrentElement();
+	}
+}
+
+void KMLParser::point()
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "coordinates") {
+			if (!pointCoordinates())
+				_reader.raiseError("Invalid coordinates.");
+		} else
+			_reader.skipCurrentElement();
+	}
+}
+
+void KMLParser::multiGeometry()
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "Point")
+			point();
+		else if (_reader.name() == "LineString")
+			lineString();
+		else
+			_reader.skipCurrentElement();
+	}
+}
+
+void KMLParser::placemark()
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "Point")
+			point();
+		else if (_reader.name() == "LineString")
+			lineString();
+		else if (_reader.name() == "MultiGeometry")
+			multiGeometry();
+		else
+			_reader.skipCurrentElement();
+	}
+}
+
+void KMLParser::document()
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "Placemark")
+			placemark();
+		else
+			_reader.skipCurrentElement();
+	}
+}
+
+void KMLParser::kml()
+{
+	while (_reader.readNextStartElement()) {
+		if (_reader.name() == "Document")
+			document();
+		else
+			_reader.skipCurrentElement();
+	}
+}
+
+bool KMLParser::parse()
+{
+	if (_reader.readNextStartElement()) {
+		if (_reader.name() == "kml")
+			kml();
+		else
+			_reader.raiseError("Not a KML file.");
+	}
+
+	return !_reader.error();
+}
+
+bool KMLParser::loadFile(QIODevice *device)
+{
+	_reader.clear();
+	_reader.setDevice(device);
+
+	return parse();
+}
diff --git a/src/kmlparser.h b/src/kmlparser.h
new file mode 100644
index 00000000..b27f348f
--- /dev/null
+++ b/src/kmlparser.h
@@ -0,0 +1,37 @@
+#ifndef KMLPARSER_H
+#define KMLPARSER_H
+
+#include <QXmlStreamReader>
+#include <QVector>
+#include "parser.h"
+
+class KMLParser : public Parser
+{
+public:
+	KMLParser(QList<QVector<Trackpoint> > &tracks,
+	  QList<QVector<Waypoint> > &routes, QList<Waypoint> &waypoints)
+	  : Parser(tracks, routes, waypoints) {_track = 0; _route = 0;}
+	~KMLParser() {}
+
+	bool loadFile(QIODevice *device);
+	QString errorString() const {return _reader.errorString();}
+	int errorLine() const {return _reader.lineNumber();}
+	const char *name() const {return "KML";}
+
+private:
+	bool parse();
+	void kml();
+	void document();
+	void placemark();
+	void multiGeometry();
+	void lineString();
+	void point();
+	bool pointCoordinates();
+	bool lineCoordinates();
+
+	QXmlStreamReader _reader;
+	QVector<Trackpoint> *_track;
+	QVector<Waypoint> *_route;
+};
+
+#endif // KMLPARSER_H