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#include "lupdate.h"

#include <translator.h>

#include <QtCore/QDebug>

#include <QtCore/QFile>

#include <QtCore/QString>

#include <QtXml/QXmlAttributes>

#include <QtXml/QXmlDefaultHandler>

#include <QtXml/QXmlLocator>

#include <QtXml/QXmlParseException>

QT_BEGIN_NAMESPACE

class UiReader : public QXmlDefaultHandler

{

public:

    UiReader(Translator &translator, ConversionData &cd)

      : m_translator(translator), m_cd(cd), m_lineNumber(-1), m_isTrString(false),

        m_needUtf8(translator.codecName() != "UTF-8")

    {}

    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);

    bool fatalError(const QXmlParseException &exception);

    void setDocumentLocator(QXmlLocator *locator) { m_locator = locator; }

private:

    void flush();

    Translator &m_translator;

    ConversionData &m_cd;

    QString m_context;

    QString m_source;

    QString m_comment;

    QString m_extracomment;

    QXmlLocator *m_locator;

    QString m_accum;

    int m_lineNumber;

    bool m_isTrString;

    bool m_needUtf8;

};

bool UiReader::startElement(const QString &namespaceURI,

    const QString &localName, const QString &qName, const QXmlAttributes &atts)

{

    Q_UNUSED(namespaceURI);

    Q_UNUSED(localName);

    if (qName == QLatin1String("item")) { // UI3 menu entries

        flush();

        if (!atts.value(QLatin1String("text")).isEmpty()) {

            m_source = atts.value(QLatin1String("text"));

            m_isTrString = true;

            if (!m_cd.m_noUiLines)

                m_lineNumber = m_locator->lineNumber();

        }

    } else if (qName == QLatin1String("string")) {

        flush();

        if (atts.value(QLatin1String("notr")).isEmpty() ||

            atts.value(QLatin1String("notr")) != QLatin1String("true")) {

            m_isTrString = true;

            m_comment = atts.value(QLatin1String("comment"));

            m_extracomment = atts.value(QLatin1String("extracomment"));

            if (!m_cd.m_noUiLines)

                m_lineNumber = m_locator->lineNumber();

        } else {

            m_isTrString = false;

        }

    }

    m_accum.clear();

    return true;

}

bool UiReader::endElement(const QString &namespaceURI,

    const QString &localName, const QString &qName)

{

    Q_UNUSED(namespaceURI);

    Q_UNUSED(localName);

    m_accum.replace(QLatin1String("\r\n"), QLatin1String("\n"));

    if (qName == QLatin1String("class")) { // UI "header"

        if (m_context.isEmpty())

            m_context = m_accum;

    } else if (qName == QLatin1String("string") && m_isTrString) {

        m_source = m_accum;

    } else if (qName == QLatin1String("comment")) { // FIXME: what's that?

        m_comment = m_accum;

        flush();

    } else if (qName == QLatin1String("function")) { // UI3 embedded code

        fetchtrInlinedCpp(m_accum, m_translator, m_context);

    } else {

        flush();

    }

    return true;

}

bool UiReader::characters(const QString &ch)

{

    m_accum += ch;

    return true;

}

bool UiReader::fatalError(const QXmlParseException &exception)

{

    QString msg;

    msg.sprintf("XML error: Parse error at line %d, column %d (%s).",

                 exception.lineNumber(), exception.columnNumber(),

                 exception.message().toLatin1().data());

    m_cd.appendError(msg); 

    return false;

}

void UiReader::flush()

{

    if (!m_context.isEmpty() && !m_source.isEmpty()) {

        TranslatorMessage msg(m_context, m_source,

           m_comment, QString(), m_cd.m_sourceFileName,

           m_lineNumber, QStringList());

        msg.setExtraComment(m_extracomment);

        if (m_needUtf8 && msg.needs8Bit())

            msg.setUtf8(true);

        m_translator.extend(msg);

    }

    m_source.clear();

    m_comment.clear();

    m_extracomment.clear();

}

bool loadUI(Translator &translator, const QString &filename, ConversionData &cd)

{

    cd.m_sourceFileName = filename;

    QFile file(filename);

    if (!file.open(QIODevice::ReadOnly)) {

        cd.appendError(QString::fromLatin1("Cannot open %1: %2")

            .arg(filename, file.errorString()));

        return false;

    }

    QXmlInputSource in(&file);

    QXmlSimpleReader reader;

    reader.setFeature(QLatin1String("http://xml.org/sax/features/namespaces"), false);

    reader.setFeature(QLatin1String("http://xml.org/sax/features/namespace-prefixes"), true);

    reader.setFeature(QLatin1String(

            "http://trolltech.com/xml/features/report-whitespace-only-CharData"), false);

    UiReader handler(translator, cd);

    reader.setContentHandler(&handler);

    reader.setErrorHandler(&handler);

    bool result = reader.parse(in);

    if (!result)

        cd.appendError(QLatin1String("Parse error in UI file"));

    reader.setContentHandler(0);

    reader.setErrorHandler(0);

    return result;

}

QT_END_NAMESPACE