From 0ed630dd20575568a513a9e900035eaafec76ca9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Mon, 20 Jan 2025 23:27:44 +0100
Subject: [PATCH] Added support for geo URIs (RFC 5870)

---
 src/GUI/gui.cpp   | 40 +++++++++++++++++++++++++++++
 src/GUI/gui.h     |  1 +
 src/data/data.cpp | 64 +++++++++++++++++++++++++++++++++++++++++++++++
 src/data/data.h   |  1 +
 4 files changed, 106 insertions(+)

diff --git a/src/GUI/gui.cpp b/src/GUI/gui.cpp
index 5102305e..627a0484 100644
--- a/src/GUI/gui.cpp
+++ b/src/GUI/gui.cpp
@@ -1069,6 +1069,16 @@ void GUI::openDir()
 
 bool GUI::openFile(const QString &fileName, bool tryUnknown, int &showError)
 {
+	QUrl url(fileName);
+	if (url.scheme() == "geo") {
+		if (loadURL(url, showError)) {
+			_fileActionGroup->setEnabled(true);
+			_reloadFileAction->setEnabled(false);
+			return true;
+		} else if (showError)
+			return false;
+	}
+
 	QFileInfo fi(fileName);
 	QString canonicalFileName(fi.canonicalFilePath());
 
@@ -1099,6 +1109,36 @@ bool GUI::openFile(const QString &fileName, bool tryUnknown, int &showError)
 	return true;
 }
 
+bool GUI::loadURL(const QUrl &url, int &showError)
+{
+	Data data(url);
+
+	if (data.isValid()) {
+		loadData(data);
+		return true;
+	} else {
+		if (showError) {
+			QString error = tr("Error loading geo URI:") + "\n" + url.toString()
+			  + ": " + data.errorString();
+
+			if (showError > 1) {
+				QMessageBox message(QMessageBox::Critical, APP_NAME, error,
+				  QMessageBox::Ok, this);
+				QCheckBox checkBox(tr("Don't show again"));
+				message.setCheckBox(&checkBox);
+				message.exec();
+				if (checkBox.isChecked())
+					showError = 0;
+			} else
+				QMessageBox::critical(this, APP_NAME, error);
+		} else
+			qWarning("%s: %s", qUtf8Printable(url.toString()),
+			  qUtf8Printable(data.errorString()));
+
+		return false;
+	}
+}
+
 bool GUI::loadFile(const QString &fileName, bool tryUnknown, int &showError)
 {
 	Data data(fileName, tryUnknown);
diff --git a/src/GUI/gui.h b/src/GUI/gui.h
index 3b3dd7cc..f8020de7 100644
--- a/src/GUI/gui.h
+++ b/src/GUI/gui.h
@@ -158,6 +158,7 @@ private:
 #endif // Q_OS_ANDROID
 	bool openPOIFile(const QString &fileName);
 	bool loadFile(const QString &fileName, bool tryUnknown, int &showError);
+	bool loadURL(const QUrl &url, int &showError);
 	void loadData(const Data &data);
 	bool loadMapNode(const TreeNode<Map*> &node, MapAction *&action,
 	  const QList<QAction*> &existingActions, int &showError);
diff --git a/src/data/data.cpp b/src/data/data.cpp
index e9b7a888..c88bec56 100644
--- a/src/data/data.cpp
+++ b/src/data/data.cpp
@@ -2,6 +2,7 @@
 #include <QFile>
 #include <QFileInfo>
 #include "common/util.h"
+#include "map/crs.h"
 #include "gpxparser.h"
 #include "tcxparser.h"
 #include "csvparser.h"
@@ -154,6 +155,69 @@ Data::Data(const QString &fileName, bool tryUnknown)
 	}
 }
 
+Data::Data(const QUrl &url)
+{
+	bool caOk, cbOk, ccOk;
+	Coordinates c;
+	Projection proj;
+
+	_valid = false;
+
+	QStringList parts(url.path().split(';'));
+	if (parts.size() < 1) {
+		_errorString = "Syntax error";
+		return;
+	}
+	QStringList coords(parts.at(0).split(','));
+	if (coords.size() < 2 || coords.size() > 3) {
+		_errorString = "Syntax error";
+		return;
+	}
+	double ca = coords.at(0).toDouble(&caOk);
+	double cb = coords.at(1).toDouble(&cbOk);
+	double cc = NAN;
+	if (!(caOk && cbOk)) {
+		_errorString = "Invalid coordinates";
+		return;
+	}
+	if (coords.size() > 2) {
+		cc = coords.at(2).toDouble(&ccOk);
+		if (!ccOk) {
+			_errorString = "Invalid elevation";
+			return;
+		}
+	}
+
+	if (parts.size() > 1) {
+		QStringList crsp(parts.at(1).split('='));
+		if (crsp.size() != 2) {
+			_errorString = "Syntax error";
+			return;
+		}
+		if (!crsp.at(0).compare("crs", Qt::CaseInsensitive)) {
+			if (crsp.at(1).compare("wgs84", Qt::CaseInsensitive)) {
+				proj = CRS::projection(crsp.at(1));
+				if (!proj.isValid()) {
+					_errorString = "Unknown CRS";
+					return;
+				}
+			}
+		}
+	}
+
+	c = proj.isValid() ? proj.xy2ll(PointD(ca, cb)) : Coordinates(cb, ca);
+	if (!c.isValid()) {
+		_errorString = "Invalid coordinates";
+		return;
+	}
+
+	Waypoint w(c);
+	w.setElevation(cc);
+	_waypoints.append(w);
+
+	_valid = true;
+}
+
 QString Data::formats()
 {
 	return
diff --git a/src/data/data.h b/src/data/data.h
index 257f6263..0e27bd9a 100644
--- a/src/data/data.h
+++ b/src/data/data.h
@@ -14,6 +14,7 @@ class Data
 {
 public:
 	Data(const QString &fileName, bool tryUnknown = true);
+	Data(const QUrl &url);
 
 	bool isValid() const {return _valid;}
 	const QString &errorString() const {return _errorString;}