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#include <qxml.h>

#include <qregexp.h>

#include "parser.h"

class ContentHandler : public QXmlDefaultHandler

{

    public:

	ContentHandler();

	// QXmlContentHandler methods

	bool startDocument();

	bool endDocument();

	bool startElement(const QString &namespaceURI,

			    const QString &localName,

			    const QString &qName,

			    const QXmlAttributes & atts);

	bool endElement(const QString &namespaceURI,

			    const QString &localName,

			    const QString &qName);

	bool characters(const QString &ch);

	void setDocumentLocator(QXmlLocator *locator);

	bool startPrefixMapping (const QString &prefix, const QString & uri);

	bool endPrefixMapping(const QString &prefix);

	bool ignorableWhitespace (const QString & ch);

	bool processingInstruction(const QString &target, const QString &data);

	bool skippedEntity (const QString & name);

	// QXmlErrorHandler methods

	bool warning (const QXmlParseException & exception);

	bool error (const QXmlParseException & exception);

	bool fatalError (const QXmlParseException & exception);

	// QXmlDTDHandler methods

	bool notationDecl ( const QString & name, const QString & publicId,

				const QString & systemId );

	bool unparsedEntityDecl ( const QString & name,

				    const QString & publicId,

				    const QString & systemId,

				    const QString & notationName );

	// QXmlEntityResolver methods

	bool resolveEntity ( const QString & publicId,

				const QString & systemId,

				QXmlInputSource *&);

	// QXmlLexicalHandler methods

	bool startDTD ( const QString & name, const QString & publicId, const QString & systemId );

	bool endDTD ();

	bool startEntity ( const QString & name );

	bool endEntity ( const QString & name );

	bool startCDATA ();

	bool endCDATA ();

	bool comment ( const QString & ch );

	// QXmlDeclHandler methods

	bool attributeDecl ( const QString & eName, const QString & aName, const QString & type, const QString & valueDefault, const QString & value );

	bool internalEntityDecl ( const QString & name, const QString & value );

	bool externalEntityDecl ( const QString & name, const QString & publicId, const QString & systemId );

	const QString &result() const { return m_result; }

        const QString &errorMsg() const { return m_error_msg; }

    private:

        QString nestPrefix() const { return QString().fill(' ', 3*m_nest); }

	QString formatAttributes(const QXmlAttributes & atts);

	QString escapeStr(const QString &s);

	unsigned m_nest;

	QString m_result, m_error_msg;

};

ContentHandler::ContentHandler()

{

    m_nest = 0;

}

bool ContentHandler::startDocument()

{

    m_result += nestPrefix();

    m_result += "startDocument()\n";

    ++m_nest;

    return TRUE;

}

bool ContentHandler::endDocument()

{

    --m_nest;

    m_result += nestPrefix();

    m_result += "endDocument()\n";

    return TRUE;

}

bool ContentHandler::startElement(const QString &namespaceURI,

				    const QString &localName,

				    const QString &qName,

				    const QXmlAttributes & atts)

{

    m_result += nestPrefix();

    m_result += "startElement(namespaceURI=\"" + escapeStr(namespaceURI)

		+ "\", localName=\"" + escapeStr(localName)

		+ "\", qName=\"" + escapeStr(qName)

		+ "\", atts=[" + formatAttributes(atts) + "])\n";

    ++m_nest;

    return TRUE;

}

QString ContentHandler::escapeStr(const QString &s)

{

    QString result = s;

    result.replace(QRegExp("\""), "\\\"");

    result.replace(QRegExp("\\"), "\\\\");

    result.replace(QRegExp("\n"), "\\n");

    result.replace(QRegExp("\r"), "\\r");

    result.replace(QRegExp("\t"), "\\t");

    return result;

}

QString ContentHandler::formatAttributes(const QXmlAttributes &atts)

{

    QString result;

    for (int i = 0, cnt = atts.count(); i < cnt; ++i) {

	if (i != 0) result += ", ";

	result += "{localName=\"" + escapeStr(atts.localName(i))

		    + "\", qName=\"" + escapeStr(atts.qName(i))

		    + "\", uri=\"" + escapeStr(atts.uri(i))

		    + "\", type=\"" + escapeStr(atts.type(i))

		    + "\", value=\"" + escapeStr(atts.value(i)) + "\"}";

    }

    return result;

}

bool ContentHandler::endElement(const QString &namespaceURI,

				const QString &localName,

				const QString &qName)

{

    --m_nest;

    m_result += nestPrefix();

    m_result += "endElement(namespaceURI=\"" + escapeStr(namespaceURI)

		+ "\", localName=\"" + escapeStr(localName)

		+ "\", qName=\"" + escapeStr(qName) + "\")\n";

    return TRUE;

}

bool ContentHandler::characters(const QString &ch)

{

    m_result += nestPrefix();

    m_result += "characters(ch=\"" + escapeStr(ch) + "\")\n";

    return TRUE;

}

void ContentHandler::setDocumentLocator(QXmlLocator *locator)

{

    m_result += nestPrefix();

    m_result += "setDocumentLocator(locator={columnNumber="

		+ QString::number(locator->columnNumber())

		+ ", lineNumber=" + QString::number(locator->lineNumber())

		+ "})\n";

}

bool ContentHandler::startPrefixMapping (const QString &prefix, const QString & uri)

{

    m_result += nestPrefix();

    m_result += "startPrefixMapping(prefix=\"" + escapeStr(prefix)

		    + "\", uri=\"" + escapeStr(uri) + "\")\n";

    ++m_nest;

    return TRUE;

}

bool ContentHandler::endPrefixMapping(const QString &prefix)

{

    --m_nest;

    m_result += nestPrefix();

    m_result += "endPrefixMapping(prefix=\"" + escapeStr(prefix) + "\")\n";

    return TRUE;

}

bool ContentHandler::ignorableWhitespace(const QString & ch)

{

    m_result += nestPrefix();

    m_result += "ignorableWhitespace(ch=\"" + escapeStr(ch) + "\")\n";

    return TRUE;

}

bool ContentHandler::processingInstruction(const QString &target, const QString &data)

{

    m_result += nestPrefix();

    m_result += "processingInstruction(target=\"" + escapeStr(target)

		+ "\", data=\"" + escapeStr(data) + "\")\n";

    return TRUE;

}

bool ContentHandler::skippedEntity (const QString & name)

{

    m_result += nestPrefix();

    m_result += "skippedEntity(name=\"" + escapeStr(name) + "\")\n";

    return TRUE;

}

bool ContentHandler::warning(const QXmlParseException & exception)

{

    m_error_msg = QString("Warning %1:%2: %3")

                    .arg(exception.columnNumber())

                    .arg(exception.lineNumber())

                    .arg(exception.message());

    m_result += nestPrefix();

    m_result += "warning(exception={columnNumber="

		    + QString::number(exception.columnNumber())

		    + ", lineNumber="

		    + QString::number(exception.lineNumber())

		    + ", publicId=\"" + escapeStr(exception.publicId())

		    + "\", systemId=\"" + escapeStr(exception.systemId())

		    + "\", message=\"" + escapeStr(exception.message())

		    + "\"})\n";

    return TRUE;

}

bool ContentHandler::error(const QXmlParseException & exception)

{

    m_error_msg = QString("Error %1:%2: %3")

                    .arg(exception.columnNumber())

                    .arg(exception.lineNumber())

                    .arg(exception.message());

    m_result += nestPrefix();

    m_result += "error(exception={columnNumber="

		    + QString::number(exception.columnNumber())

		    + ", lineNumber="

		    + QString::number(exception.lineNumber())

		    + ", publicId=\"" + escapeStr(exception.publicId())

		    + "\", systemId=\"" + escapeStr(exception.systemId())

		    + "\", message=\"" + escapeStr(exception.message())

		    + "\"})\n";

    return TRUE;

}

bool ContentHandler::fatalError(const QXmlParseException & exception)

{

    m_error_msg = QString("Fatal error %1:%2: %3")

                    .arg(exception.columnNumber())

                    .arg(exception.lineNumber())

                    .arg(exception.message());

    m_result += nestPrefix();

    m_result += "fatalError(exception={columnNumber="

		    + QString::number(exception.columnNumber())

		    + ", lineNumber="

		    + QString::number(exception.lineNumber())

		    + ", publicId=\"" + escapeStr(exception.publicId())

		    + "\", systemId=\"" + escapeStr(exception.systemId())

		    + "\", message=\"" + escapeStr(exception.message())

		    + "\"})\n";

    return TRUE;

}

bool ContentHandler::notationDecl ( const QString & name,

				    const QString & publicId,

				    const QString & systemId )

{

    m_result += nestPrefix();

    m_result += "notationDecl(name=\"" + escapeStr(name) + "\", publicId=\""

		    + escapeStr(publicId) + "\", systemId=\""

		    + escapeStr(systemId) + "\")\n";

    return TRUE;

}

bool ContentHandler::unparsedEntityDecl ( const QString & name,

					    const QString & publicId,

					    const QString & systemId,

					    const QString & notationName )

{

    m_result += nestPrefix();

    m_result += "unparsedEntityDecl(name=\"" + escapeStr(name)

		    + "\", publicId=\"" + escapeStr(publicId)

		    + "\", systemId=\"" + escapeStr(systemId)

		    + "\", notationName=\"" + escapeStr(notationName)

		    + "\")\n";

    return TRUE;

}

bool ContentHandler::resolveEntity(const QString & publicId,

				    const QString & systemId,

				    QXmlInputSource *&)

{

    m_result += nestPrefix();

    m_result += "resolveEntity(publicId=\"" + escapeStr(publicId)

		    + "\", systemId=\"" + escapeStr(systemId)

		    + "\", ret={})\n";

    return TRUE;

}

bool ContentHandler::startDTD ( const QString & name, const QString & publicId, const QString & systemId )

{

    m_result += nestPrefix();

    m_result += "startDTD(name=\"" + escapeStr(name)

		    + "\", publicId=\"" + escapeStr(publicId)

		    + "\", systemId=\"" + escapeStr(systemId) + "\")\n";

    ++m_nest;

    return TRUE;

}

bool ContentHandler::endDTD ()

{

    --m_nest;

    m_result += nestPrefix();

    m_result += "endDTD()\n";

    return TRUE;

}

bool ContentHandler::startEntity ( const QString & name )

{

    m_result += nestPrefix();

    m_result += "startEntity(name=\"" + escapeStr(name) + "\")\n";

    ++m_nest;

    return TRUE;

}

bool ContentHandler::endEntity ( const QString & name )

{

    --m_nest;

    m_result += nestPrefix();

    m_result += "endEntity(name=\"" + escapeStr(name) + "\")\n";

    return TRUE;

}

bool ContentHandler::startCDATA ()

{

    m_result += nestPrefix();

    m_result += "startCDATA()\n";

    ++m_nest;

    return TRUE;

}

bool ContentHandler::endCDATA ()

{

    --m_nest;

    m_result += nestPrefix();

    m_result += "endCDATA()\n";

    return TRUE;

}

bool ContentHandler::comment ( const QString & ch )

{

    m_result += nestPrefix();

    m_result += "comment(ch=\"" + escapeStr(ch) + "\")\n";

    return TRUE;

}

bool ContentHandler::attributeDecl ( const QString & eName,

					const QString & aName,

					const QString & type,

					const QString & valueDefault,

					const QString & value )

{

    m_result += nestPrefix();

    m_result += "attributeDecl(eName=\"" + escapeStr(eName) + "\", aName=\""

		+ escapeStr(aName) + "\", type=\"" + escapeStr(type)

		+ "\", valueDefault=\"" + escapeStr(valueDefault)

		+ "\", value=\"" + escapeStr(value) + "\")\n";

    return TRUE;

}

bool ContentHandler::internalEntityDecl ( const QString & name,

					    const QString & value )

{

    m_result += nestPrefix();

    m_result += "internatlEntityDecl(name=\"" + escapeStr(name)

		    + "\", value=\"" + escapeStr(value) + "\")\n";

    return TRUE;

}

bool ContentHandler::externalEntityDecl ( const QString & name,

					    const QString & publicId,

					    const QString & systemId )

{

    m_result += nestPrefix();

    m_result += "externalEntityDecl(name=\"" + escapeStr(name)

		    + "\", publicId=\"" + escapeStr(publicId)

		    + "\", systemId=\"" + escapeStr(systemId) + "\")\n";

    return TRUE;

}

Parser::Parser()

{

    handler = new ContentHandler;

    setContentHandler(handler);

    setDTDHandler(handler);

    setDeclHandler(handler);

    setEntityResolver(handler);

    setErrorHandler(handler);

    setLexicalHandler(handler);

}

Parser::~Parser()

{

    delete handler;

}

bool Parser::parseFile(QFile *file)

{

    QXmlInputSource source(file);

    return parse(source);

}

QString Parser::result() const

{

    return handler->result();

}

QString Parser::errorMsg() const

{

    return handler->errorMsg();

}