/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt Linguist of the Qt Toolkit.

**

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

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** $QT_END_LICENSE$

**

****************************************************************************/

#include "translator.h"

#include <QtCore/QByteArray>

#include <QtCore/QDebug>

#include <QtCore/QTextCodec>

#include <QtCore/QTextStream>

#include <QtXml/QXmlStreamReader>

#include <QtXml/QXmlStreamAttribute>

QT_BEGIN_NAMESPACE

class QPHReader : public QXmlStreamReader

{

public:

    QPHReader(QIODevice &dev)

      : QXmlStreamReader(&dev)

    {}

    // the "real thing"

    bool read(Translator &translator);

private:

    bool isWhiteSpace() const

    {

        return isCharacters() && text().toString().trimmed().isEmpty();

    }

    enum DataField { NoField, SourceField, TargetField, DefinitionField };

    DataField m_currentField;

    QString m_currentSource;

    QString m_currentTarget;

    QString m_currentDefinition;

};

bool QPHReader::read(Translator &translator)

{

    m_currentField = NoField;

    QString result;

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("source")) {

                m_currentField = SourceField;

            } else if (name() == QLatin1String("target")) {

                m_currentField = TargetField;

            } else if (name() == QLatin1String("definition")) {

                m_currentField = DefinitionField;

            } else {

                m_currentField = NoField;

                if (name() == QLatin1String("QPH")) {

                    QXmlStreamAttributes atts = attributes();

                    translator.setLanguageCode(atts.value(QLatin1String("language")).toString());

                    translator.setSourceLanguageCode(atts.value(QLatin1String("sourcelanguage")).toString());

                }

            }

        } else if (isWhiteSpace()) {

            // ignore these

        } else if (isCharacters()) {

            if (m_currentField == SourceField)

                m_currentSource += text();

            else if (m_currentField == TargetField)

                m_currentTarget += text();

            else if (m_currentField == DefinitionField)

                m_currentDefinition += text();

        } else if (isEndElement() && name() == QLatin1String("phrase")) {

            m_currentTarget.replace(QChar(Translator::TextVariantSeparator),

                                    QChar(Translator::BinaryVariantSeparator));

            TranslatorMessage msg;

            msg.setSourceText(m_currentSource);

            msg.setTranslation(m_currentTarget);

            msg.setComment(m_currentDefinition);

            translator.append(msg);

            m_currentSource.clear();

            m_currentTarget.clear();

            m_currentDefinition.clear();

        }

    }

    return true;

}

static bool loadQPH(Translator &translator, QIODevice &dev, ConversionData &)

{

    translator.setLocationsType(Translator::NoLocations);

    QPHReader reader(dev);

    return reader.read(translator);

}

static QString protect(const QString &str)

{

    QString result;

    result.reserve(str.length() * 12 / 10);

    for (int i = 0; i != str.size(); ++i) {

        uint c = str.at(i).unicode();

        switch (c) {

        case '\"':

            result += QLatin1String(""");

            break;

        case '&':

            result += QLatin1String("&");

            break;

        case '>':

            result += QLatin1String(">");

            break;

        case '<':

            result += QLatin1String("<");

            break;

        case '\'':

            result += QLatin1String("'");

            break;

        default:

            if (c < 0x20 && c != '\r' && c != '\n' && c != '\t')

                result += QString(QLatin1String("&#%1;")).arg(c);

            else // this also covers surrogates

                result += QChar(c);

        }

    }

    return result;

}

static bool saveQPH(const Translator &translator, QIODevice &dev, ConversionData &)

{

    QTextStream t(&dev);

    t.setCodec(QTextCodec::codecForName("UTF-8"));

    t << "<!DOCTYPE QPH>\n<QPH";

    QString languageCode = translator.languageCode();

    if (!languageCode.isEmpty() && languageCode != QLatin1String("C"))

        t << " language=\"" << languageCode << "\"";

    languageCode = translator.sourceLanguageCode();

    if (!languageCode.isEmpty() && languageCode != QLatin1String("C"))

        t << " sourcelanguage=\"" << languageCode << "\"";

    t << ">\n";

    foreach (const TranslatorMessage &msg, translator.messages()) {

        t << "<phrase>\n";

        t << "    <source>" << protect(msg.sourceText()) << "</source>\n";

        QString str = msg.translations().join(QLatin1String("@"));

        str.replace(QChar(Translator::BinaryVariantSeparator),

                    QChar(Translator::TextVariantSeparator));

        t << "    <target>" << protect(str)

            << "</target>\n";

        if (!msg.comment().isEmpty())

            t << "    <definition>" << protect(msg.comment()) << "</definition>\n";

        t << "</phrase>\n";

    }

    t << "</QPH>\n";

    return true;

}

int initQPH()

{

    Translator::FileFormat format;

    format.extension = QLatin1String("qph");

    format.description = QObject::tr("Qt Linguist 'Phrase Book'");

    format.fileType = Translator::FileFormat::TranslationSource;

    format.priority = 0;

    format.loader = &loadQPH;

    format.saver = &saveQPH;

    Translator::registerFileFormat(format);

    return 1;

}

Q_CONSTRUCTOR_FUNCTION(initQPH)

QT_END_NAMESPACE