/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the tools applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qt3to4.h"+
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+
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#include <QApplication>+
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#include <QDir>+
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#include <QFile>+
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#include <QHash>+
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#include <QLibraryInfo>+
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#include <QXmlDefaultHandler>+
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#include <QXmlSimpleReader>+
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+
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QT_BEGIN_NAMESPACE+
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+
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class ContentHandler: public QXmlDefaultHandler+
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{+
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public:+
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    typedef QPair<QString, QString> Rule;+
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    typedef QList<Rule> RuleList;+
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+
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public:+
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    ContentHandler() {}+
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+
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    inline RuleList renamedHeaders() const+
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    { return rules(QString::fromLatin1("RenamedHeader")); }+
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+
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    inline RuleList renamedClasses() const+
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    { return rules(QString::fromLatin1("RenamedClass")); }+
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+
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    inline RuleList renamedEnums() const+
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    { return rules(QString::fromLatin1("RenamedEnumvalue")); }+
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+
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    inline RuleList rules(const QString &kind) const+
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    { return m_rules.value(kind); }+
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+
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    virtual bool startDocument()+
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    {+
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        m_rules.clear();+
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        m_state.current.clear();+
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        m_state.kind.clear();+
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        m_state.q3.clear();+
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        m_state.q4.clear();+
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+
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        return true;+
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    }+
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+
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    virtual bool startElement(const QString &, const QString &, const QString &qName, const QXmlAttributes &attrs)+
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    {+
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        if (qName == QLatin1String("item")) {+
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            m_state.kind = attrs.value(QLatin1String("Type"));+
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+
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            m_state.current.clear();+
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            m_state.q3.clear();+
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            m_state.q4.clear();+
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+
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            if (!m_rules.contains(m_state.kind))+
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                m_rules[m_state.kind].clear();+
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+
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            return true;+
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        }+
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+
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        return true; // ### only if it is a valid tag+
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    }+
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+
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+
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    virtual bool endElement(const QString &, const QString &, const QString &qName)+
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    {+
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        if (qName == QLatin1String("Qt3")) {+
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            m_state.q3 = m_state.current.trimmed();+
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        } else if (qName == QLatin1String("Qt4")) {+
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            m_state.q4 = m_state.current.trimmed();+
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        } else if (qName == QLatin1String("item")+
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                   && (m_state.kind == QLatin1String("RenamedHeader")+
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                       || m_state.kind == QLatin1String("RenamedEnumvalue")+
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                       || m_state.kind == QLatin1String("RenamedClass"))) {+
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            Rule r(m_state.q3, m_state.q4);+
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            m_rules[m_state.kind].append(r);+
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        }+
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+
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        m_state.current.clear();+
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        return true;+
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    }+
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+
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    virtual bool characters(const QString &ch)+
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    { m_state.current += ch; return true; }+
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+
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    virtual bool error(const QXmlParseException &e)+
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    { Q_UNUSED(e); Q_ASSERT(0); return true; }+
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+
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    virtual bool fatalError(const QXmlParseException &e)+
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    { Q_UNUSED(e); Q_ASSERT(0); return true; }+
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+
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    virtual bool warning(const QXmlParseException &e)+
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    { Q_UNUSED(e); Q_ASSERT(0); return true; }+
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+
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private:+
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    QHash<QString, RuleList> m_rules;+
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+
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    struct state+
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    {+
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        QString current;+
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        QString kind;+
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        QString q3;+
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        QString q4;+
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    } m_state;+
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};+
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+
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void Porting::readXML(RuleList *renamedHeaders, RuleList *renamedClasses, RuleList *renamedEnums)+
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{+
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    QString fileName = QLatin1String("q3porting.xml");+
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    QString filePath;+
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    //check QLibraryInfo::DataPath/filename+
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    filePath = QDir::cleanPath(QLibraryInfo::location(QLibraryInfo::DataPath) + QLatin1Char('/') + fileName)  ;+
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+
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    //check QLibraryInfo::PrefixPath/tools/porting/src/filename+
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    if (!QFile::exists(filePath))+
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        filePath = QDir::cleanPath(QLibraryInfo::location(QLibraryInfo::PrefixPath) + QLatin1String("/tools/porting/src/") + fileName);+
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+
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    // for bootstrapping, look in the rules file in a location+
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    // relative to where it would be in the source tree+
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    if (!QFile::exists(filePath))+
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        filePath = QDir::cleanPath(QApplication::instance()->applicationDirPath() + QLatin1String("/../tools/porting/src/") + fileName);+
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+
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    if (!QFile::exists(filePath)) {+
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        fprintf(stderr, "Error: Could not find rules file: %s\n", fileName.toLatin1().constData());+
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        Q_ASSERT(0);+
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    }+
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+
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    ContentHandler handler;+
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+
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    QXmlSimpleReader reader;+
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    reader.setContentHandler(&handler);+
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    reader.setErrorHandler(&handler);+
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+
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    QFile file(filePath);+
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    file.open(QFile::ReadOnly);+
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+
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    QXmlInputSource source(file);+
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    bool ok = reader.parse(&source);+
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    Q_UNUSED(ok);+
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    Q_ASSERT(ok);+
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+
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    if (renamedHeaders)+
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        *renamedHeaders = handler.renamedHeaders();+
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    if (renamedClasses)+
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        *renamedClasses = handler.renamedClasses();+
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    if (renamedEnums)+
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        *renamedEnums = handler.renamedEnums();+
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+
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}+
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+
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Porting::Porting()+
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{+
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    readXML(&m_renamedHeaders, &m_renamedClasses, &m_renamedEnums);+
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}+
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+
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int Porting::findRule(const RuleList &rules, const QString &q3)+
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{+
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    for (int i=0; i<rules.count(); ++i)+
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        if (rules.at(i).first == q3)+
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            return i;+
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    return -1;+
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}+
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+
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QString Porting::renameHeader(const QString &headerName) const+
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{+
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    int index = findRule(m_renamedHeaders, headerName);+
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    return index == -1 ? headerName : m_renamedHeaders.at(index).second;+
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}+
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+
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QString Porting::renameClass(const QString &className) const+
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{+
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    if (className == QLatin1String("QSplitter"))  // We don't want a Q3Splitter, ever!+
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        return className;+
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+
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    int index = findRule(m_renamedClasses, className);+
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    return index == -1 ? className : m_renamedClasses.at(index).second;+
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}+
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+
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QString Porting::renameEnumerator(const QString &enumName) const+
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{+
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    int index = findRule(m_renamedEnums, enumName);+
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    return index == -1 ? QString() : m_renamedEnums.at(index).second;+
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}+
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+
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QT_END_NAMESPACE+
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