Method load

src/backend/core/Project.cpp:533–638

}

bool Project::load(const QString& filename, bool preview) {
	setFileName(filename);
	DEBUG(Q_FUNC_INFO << ", LOADING file " << STDSTRING(filename))
	QIODevice* file;
	if (filename.endsWith(QLatin1String(".lml"), Qt::CaseInsensitive)) {
		DEBUG(Q_FUNC_INFO << ", filename ends with .lml")

		// check compression
		file = new QFile(filename);
		if (!file->open(QIODevice::ReadOnly)) {
			KMessageBox::error(nullptr, i18n("Sorry. Could not open file for reading."));
			delete file;
			return false;
		}
		QDataStream in(file);
		quint16 magic;
		in >> magic;
		file->close();
		delete file;

		if (!magic) {
			KMessageBox::error(nullptr, i18n("The project file is empty."), i18n("Error opening project"));
			return false;
		}
		QDEBUG(Q_FUNC_INFO << ", got magic: " << magic << Qt::hex << "0x" << magic)

		if (magic == 0xfd37) // XZ compressed data
			file = new KCompressionDevice(filename, KCompressionDevice::Xz);
		else // gzip or not compressed data
			file = new KCompressionDevice(filename, KCompressionDevice::GZip);
	} else { // opens filename using file ending
		// DEBUG(Q_FUNC_INFO << ", filename does not end with .lml. Guessing by extension")
		file = new KCompressionDevice(filename);
		DEBUG(Q_FUNC_INFO << ", found compression type " << ((KCompressionDevice*)file)->compressionType())
	}

	if (!file)
		file = new QFile(filename);

	if (!file->open(QIODevice::ReadOnly)) {
		KMessageBox::error(nullptr, i18n("Sorry. Could not open file for reading."));
		return false;
	}

	char c;
	bool rc = file->getChar(&c);
	if (!rc) {
		KMessageBox::error(nullptr, i18n("The project file is empty."), i18n("Error opening project"));
		file->close();
		delete file;
		return false;
	}
	file->seek(0);

	// parse XML
	XmlStreamReader reader(file);
	setIsLoading(true);
	ProjectPrivate::mXmlVersion =