implemented xml parser

tools/settingsgenerator/main.cpp

@@ -1,8 +1,57 @@
 #include <QCoreApplication>
+#include <QCommandLineParser>
+#include <QFile>
+#include <QXmlStreamReader>
+#include <QDebug>
+
+#include "settingsgenerator.h"
 
 int main(int argc, char *argv[])
 {
 	QCoreApplication a(argc, argv);
+	QCoreApplication::setApplicationName(QStringLiteral(TARGET));
+	QCoreApplication::setApplicationVersion(QStringLiteral(VERSION));
+	QCoreApplication::setOrganizationName(QStringLiteral(COMPANY));
+	QCoreApplication::setOrganizationDomain(QStringLiteral(BUNDLE_PREFIX));
+
+	QCommandLineParser parser;
+	parser.setApplicationDescription(QStringLiteral("A tool to...")); //TODO description
+	parser.addVersionOption();
+	parser.addHelpOption();
+
+	parser.addOption({
+						 {QStringLiteral("t"), QStringLiteral("translate")},
+						 QStringLiteral("Translate the given settings file. The output will be"
+						 "a dummy cpp file, writte to --impl.")
+					 });
+	parser.addOption({
+						 QStringLiteral("in"),
+						 QStringLiteral("The input XML <file> containing the settings definition"),
+						 QStringLiteral("file")
+					 });
+	parser.addOption({
+						 QStringLiteral("header"),
+						 QStringLiteral("The <name> of the header file to generate"),
+						 QStringLiteral("name")
+					 });
+	parser.addOption({
+						 QStringLiteral("impl"),
+						 QStringLiteral("The <name> of the implementation file to generate"),
+						 QStringLiteral("name")
+					 });
 
-	return a.exec();
+	parser.process(a);
+
+	try {
+		SettingsGenerator generator {
+			parser.value(QStringLiteral("in")),
+			parser.value(QStringLiteral("header")),
+			parser.value(QStringLiteral("impl"))
+		};
+		generator.process();
+		return EXIT_SUCCESS;
+	} catch (const QString &str) {
+		qCritical() << qUtf8Printable(str);
+		return EXIT_FAILURE;
+	}
 }

tools/settingsgenerator/qsettingsgenerator.xsd

@@ -14,7 +14,7 @@
 		<xs:simpleContent>
 			<xs:extension base="xs:string">
 				<xs:attribute default="true" name="required" type="xs:boolean" use="optional"/>
-				<xs:attribute name="rootnode" type="xs:string" use="optional"/>
+				<xs:attribute name="rootNode" type="xs:string" use="optional"/>
 			</xs:extension>
 		</xs:simpleContent>
 	</xs:complexType>
@@ -62,7 +62,7 @@
 				<xs:attribute name="qmlGroupKey" type="xs:string" use="optional"/>
 				<xs:attribute name="default" type="xs:string" use="optional"/>
 				<xs:attribute default="false" name="tr" type="xs:boolean" use="optional"/>
-				<xs:attribute name="trcontext" type="xs:string" use="optional"/>
+				<xs:attribute name="trContext" type="xs:string" use="optional"/>
 			</xs:extension>
 		</xs:complexContent>
 	</xs:complexType>

tools/settingsgenerator/settingsgenerator.cpp

@@ -0,0 +1,214 @@
+#include "settingsgenerator.h"
+#include <QDebug>
+
+SettingsGenerator::SettingsGenerator(const QString &inPath, const QString &hdrPath, const QString &srcPath) :
+	_inFile{inPath},
+	_hdrFile{hdrPath},
+	_srcFile{srcPath},
+	_xml{&_inFile},
+	_hdr{&_hdrFile},
+	_src{&_srcFile}
+{}
+
+void SettingsGenerator::process()
+{
+	if(!_inFile.open(QIODevice::ReadOnly | QIODevice::Text))
+		throwFile(_inFile);
+	if(!_hdrFile.open(QIODevice::WriteOnly | QIODevice::Text))
+		throwFile(_hdrFile);
+	if(!_srcFile.open(QIODevice::WriteOnly | QIODevice::Text))
+		throwFile(_srcFile);
+
+	readData();
+}
+
+void SettingsGenerator::readData()
+{
+	if(!_xml.readNextStartElement())
+		throwReader();
+	if(_xml.name() != QStringLiteral("Settings"))
+		throwChild();
+
+	_data = readSettings();
+	checkError();
+	qDebug() << "Completed parsing xml - it is valid";
+}
+
+SettingsGenerator::Include SettingsGenerator::readInclude()
+{
+	Include include;
+	include.local = readAttrib<bool>(QStringLiteral("local"), false);
+	include.include = _xml.readElementText();
+	checkError();
+	return include;
+}
+
+SettingsGenerator::Param SettingsGenerator::readParam()
+{
+	Param param;
+	param.key = readAttrib(QStringLiteral("key"), {}, true);
+	param.type = readAttrib(QStringLiteral("type"), {}, true);
+	param.asStr = readAttrib<bool>(QStringLiteral("asStr"), false);
+	param.value = _xml.readElementText();
+	checkError();
+	return param;
+}
+
+QSharedPointer<SettingsGenerator::Backend> SettingsGenerator::readBackend()
+{
+	auto backend = QSharedPointer<Backend>::create();
+	backend->className = readAttrib(QStringLiteral("class"), {}, true);
+	while(_xml.readNextStartElement()) {
+		if(_xml.name() == QStringLiteral("Param"))
+			backend->params.append(readParam());
+		else
+			throwChild();
+	}
+	checkError();
+	return backend;
+}
+
+QPair<QString, QString> SettingsGenerator::readTypeMapping()
+{
+	QPair<QString, QString> mapping;
+	mapping.first = readAttrib(QStringLiteral("key"), {}, true);
+	mapping.second = readAttrib(QStringLiteral("type"), {}, true);
+	checkError();
+	return mapping;
+}
+
+SettingsGenerator::Node SettingsGenerator::readNode()
+{
+	Node node;
+	node.key = readAttrib(QStringLiteral("key"), {}, true);
+	while(_xml.readNextStartElement()) {
+		if(_xml.name() == QStringLiteral("Node"))
+			node.subNodes.append(readNode());
+		else if(_xml.name() == QStringLiteral("Entry"))
+			node.subEntries.append(readEntry());
+		else if(_xml.name() == QStringLiteral("Import"))
+			node.subImports.append(readImport());
+		else
+			throwChild();
+	}
+	checkError();
+	return node;
+}
+
+SettingsGenerator::Entry SettingsGenerator::readEntry()
+{
+	Entry entry;
+	entry.key = readAttrib(QStringLiteral("key"), {}, true);
+	entry.type = readAttrib(QStringLiteral("type"), {}, true);
+	entry.qmlGroupKey = readAttrib(QStringLiteral("qmlGroupKey"));
+	entry.defaultValue = readAttrib(QStringLiteral("default"));
+	entry.tr = readAttrib<bool>(QStringLiteral("tr"), false);
+	entry.trContext = readAttrib(QStringLiteral("trContext"));
+	while(_xml.readNextStartElement()) {
+		if(_xml.name() == QStringLiteral("Code")) {
+			if(!entry.defaultValue.isNull())
+				throwChild();
+			entry.defaultValue = _xml.readElementText();
+			entry.defaultIsCode = true;
+			checkError();
+		} else if(_xml.name() == QStringLiteral("Node"))
+			entry.subNodes.append(readNode());
+		else if(_xml.name() == QStringLiteral("Entry"))
+			entry.subEntries.append(readEntry());
+		else if(_xml.name() == QStringLiteral("Import"))
+			entry.subImports.append(readImport());
+		else
+			throwChild();
+	}
+	checkError();
+	return entry;
+}
+
+SettingsGenerator::Import SettingsGenerator::readImport()
+{
+	Import import;
+	import.required = readAttrib<bool>(QStringLiteral("required"), true);
+	import.rootNode = readAttrib(QStringLiteral("rootNode"));
+	import.import = _xml.readElementText();
+	checkError();
+	return import;
+}
+
+SettingsGenerator::Settings SettingsGenerator::readSettings()
+{
+	Settings settings;
+	settings.name = readAttrib(QStringLiteral("name"), {}, true);
+	settings.prefix = readAttrib(QStringLiteral("prefix"));
+
+	while(_xml.readNextStartElement()) {
+		if(_xml.name() == QStringLiteral("Include"))
+			settings.includes.append(readInclude());
+		else if(_xml.name() == QStringLiteral("Backend"))
+			settings.backend = readBackend();
+		else if(_xml.name() == QStringLiteral("TypeMapping")) {
+			auto mapping = readTypeMapping();
+			settings.typeMapping.insert(mapping.first, mapping.second);
+		} else if(_xml.name() == QStringLiteral("Node"))
+			settings.subNodes.append(readNode());
+		else if(_xml.name() == QStringLiteral("Entry"))
+			settings.subEntries.append(readEntry());
+		else if(_xml.name() == QStringLiteral("Import"))
+			settings.subImports.append(readImport());
+		else
+			throwChild();
+	}
+	checkError();
+	return settings;
+}
+
+void SettingsGenerator::checkError() const
+{
+	if(_xml.hasError())
+		throwReader();
+}
+
+template<typename T>
+T SettingsGenerator::readAttrib(const QString &key, const T &defaultValue, bool required) const
+{
+	if(_xml.attributes().hasAttribute(key))
+		return QVariant(_xml.attributes().value(key).toString()).template value<T>();
+	else if(required)
+		throwReader(QStringLiteral("Required attribute \"%1\" but was not set").arg(key));
+	else
+		return defaultValue;
+}
+
+template<>
+bool SettingsGenerator::readAttrib<bool>(const QString &key, const bool &defaultValue, bool required) const
+{
+	if(_xml.attributes().hasAttribute(key)) {
+		if(_xml.attributes().value(key) == QStringLiteral("true"))
+			return true;
+		else if(_xml.attributes().value(key) == QStringLiteral("false"))
+			return false;
+		else
+			throwReader(QStringLiteral("Value of attribute \"%1\" is not a xs:boolean!").arg(key));
+	} else if(required)
+		throwReader(QStringLiteral("Required attribute \"%1\" but was not set").arg(key));
+	else
+		return defaultValue;
+}
+
+void SettingsGenerator::throwFile(const QFileDevice &file) const
+{
+	throw QStringLiteral("%1: %2").arg(file.fileName(), file.errorString());
+}
+
+void SettingsGenerator::throwReader(const QString &overwriteError) const
+{
+	throw QStringLiteral("%1:%2:%3: %4")
+			.arg(dynamic_cast<QFileDevice*>(_xml.device())->fileName())
+			.arg(_xml.lineNumber())
+			.arg(_xml.columnNumber())
+			.arg(overwriteError.isNull() ? _xml.errorString() : overwriteError);
+}
+
+void SettingsGenerator::throwChild()
+{
+	throwReader(QStringLiteral("Unexpected child element: %1").arg(_xml.name()));
+}

tools/settingsgenerator/settingsgenerator.h

@@ -0,0 +1,102 @@
+#ifndef SETTINGSGENERATOR_H
+#define SETTINGSGENERATOR_H
+
+#include <QFile>
+#include <QXmlStreamReader>
+#include <QTextStream>
+#include <QSharedPointer>
+
+class SettingsGenerator
+{
+public:
+	SettingsGenerator(const QString &inPath,
+					  const QString &hdrPath,
+					  const QString &srcPath);
+
+	void process();
+
+private:
+	QFile _inFile;
+	QFile _hdrFile;
+	QFile _srcFile;
+
+	QXmlStreamReader _xml;
+	QTextStream _hdr;
+	QTextStream _src;
+
+	struct Include{
+		bool local;
+		QString include;
+	};
+
+	struct Param {
+		QString key;
+		QString type;
+		bool asStr;
+		QString value;
+	};
+
+	struct Backend {
+		QString className;
+		QList<Param> params;
+	};
+
+	struct Entry;
+	struct Import;
+	struct Node {
+		QString key;
+		QList<Node> subNodes;
+		QList<Entry> subEntries;
+		QList<Import> subImports;
+	};
+
+	struct Entry : public Node {
+		QString type;
+		QString qmlGroupKey;
+		QString defaultValue;
+		bool defaultIsCode = false;
+		bool tr;
+		QString trContext;
+	};
+
+	struct Import {
+		bool required;
+		QString rootNode;
+		QString import;
+	};
+
+	struct Settings : public Node {
+		QString name;
+		QString prefix;
+
+		QList<Include> includes;
+		QSharedPointer<Backend> backend;
+		QHash<QString, QString> typeMapping;
+	} _data;
+
+	void readData();
+
+	Include readInclude();
+	Param readParam();
+	QSharedPointer<Backend> readBackend();
+	QPair<QString, QString> readTypeMapping();
+
+	Node readNode();
+	Entry readEntry();
+	Import readImport();
+
+	Settings readSettings();
+
+	template <typename T = QString>
+	T readAttrib(const QString &key, const T &defaultValue = {}, bool required = false) const;
+
+	void checkError() const;
+	Q_NORETURN void throwFile(const QFileDevice &file) const;
+	Q_NORETURN void throwReader(const QString &overwriteError = {}) const;
+	Q_NORETURN void throwChild();
+};
+
+template<>
+bool SettingsGenerator::readAttrib<bool>(const QString &key, const bool &defaultValue, bool required) const;
+
+#endif // SETTINGSGENERATOR_H

tools/settingsgenerator/settingsgenerator.pro

@@ -13,10 +13,12 @@ DEFINES += "VERSION=\\\"$$VERSION\\\""
 DEFINES += "COMPANY=\\\"$$COMPANY\\\""
 DEFINES += "BUNDLE_PREFIX=\\\"$$BUNDLE_PREFIX\\\""
 
-HEADERS +=
+HEADERS += \
+    settingsgenerator.h
 
 SOURCES += \
-	main.cpp
+	main.cpp \
+    settingsgenerator.cpp
 
 load(qt_tool)