/****************************************************************************+
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**+
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** Copyright (C) 2009 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 qmake application 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 "xmloutput.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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XmlOutput::XmlOutput(QTextStream &file, ConverstionType type)+
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    : xmlFile(file), indent("\t"), currentLevel(0), currentState(Bare), format(NewLine),+
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      conversion(type)+
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{+
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    tagStack.clear();+
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}+
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+
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XmlOutput::~XmlOutput()+
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{+
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    closeAll();+
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}+
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+
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// Settings ------------------------------------------------------------------+
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void XmlOutput::setIndentString(const QString &indentString)+
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{+
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    indent = indentString;+
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}+
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+
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QString XmlOutput::indentString()+
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{+
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    return indent;+
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}+
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+
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void XmlOutput::setIndentLevel(int level)+
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{+
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    currentLevel = level;+
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}+
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+
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int XmlOutput::indentLevel()+
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{+
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    return currentLevel;+
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}+
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+
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void XmlOutput::setState(XMLState state)+
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{+
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    currentState = state;+
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}+
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+
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XmlOutput::XMLState XmlOutput::state()+
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{+
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    return currentState;+
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}+
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+
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void XmlOutput::updateIndent()+
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{+
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    currentIndent.clear();+
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    for (int i = 0; i < currentLevel; ++i)+
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        currentIndent.append(indent);+
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}+
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+
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void XmlOutput::increaseIndent()+
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{+
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    ++currentLevel;+
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    updateIndent();+
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}+
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+
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void XmlOutput::decreaseIndent()+
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{+
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    if (currentLevel)+
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        --currentLevel;+
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    updateIndent();+
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    if (!currentLevel)+
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        currentState = Bare;+
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}+
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+
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QString XmlOutput::doConversion(const QString &text)+
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{+
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    if (!text.count())+
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        return QString();+
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    else if (conversion == NoConversion)+
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        return text;+
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+
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    QString output;+
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    if (conversion == XMLConversion) {+
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+
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        // this is a way to escape characters that shouldn't be converted+
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        for (int i=0; i<text.count(); ++i) {+
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            if (text.at(i) == QLatin1Char('&')) {+
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                if ( (i + 7) < text.count() &&+
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                    text.at(i + 1) == QLatin1Char('#') &&+
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                    text.at(i + 2) == QLatin1Char('x') &&+
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                    text.at(i + 7) == QLatin1Char(';') ) {+
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                    output += text.at(i);+
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                } else {+
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                    output += QLatin1String("&amp;");+
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                }+
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            } else {+
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                QChar c = text.at(i);+
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                if (c.unicode() < 0x20) {+
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                    output += QString("&#x%1;").arg(c.unicode(), 2, 16, QLatin1Char('0'));+
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                } else {+
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                    output += text.at(i);+
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                }+
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            }+
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        }+
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    } else {+
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        output = text;+
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    }+
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+
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    if (conversion == XMLConversion) {+
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        output.replace('\"', "&quot;");+
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        output.replace('\'', "&apos;");+
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    } else if (conversion == EscapeConversion) {+
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        output.replace('\"', "\\\"");+
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        output.replace('\'', "\\\'");+
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    }+
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    return output;+
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}+
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+
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// Stream functions ----------------------------------------------------------+
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XmlOutput& XmlOutput::operator<<(const QString& o)+
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{+
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    return operator<<(data(o));+
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}+
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+
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XmlOutput& XmlOutput::operator<<(const xml_output& o)+
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{+
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    switch(o.xo_type) {+
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    case tNothing:+
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        break;+
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    case tRaw:+
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        addRaw(o.xo_text);+
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        break;+
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    case tDeclaration:+
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        addDeclaration(o.xo_text, o.xo_value);+
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        break;+
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    case tTag:+
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        newTagOpen(o.xo_text);+
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        break;+
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    case tCloseTag:+
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        if (o.xo_value.count())+
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            closeAll();+
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        else if (o.xo_text.count())+
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            closeTo(o.xo_text);+
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        else+
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            closeTag();+
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        break;+
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    case tAttribute:+
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        addAttribute(o.xo_text, o.xo_value);+
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        break;+
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    case tData:+
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        {+
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            // Special case to be able to close tag in normal+
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            // way ("</tag>", not "/>") without using addRaw()..+
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            if (!o.xo_text.count()) {+
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                closeOpen();+
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                break;+
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            }+
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            QString output = doConversion(o.xo_text);+
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            output.replace('\n', "\n" + currentIndent);+
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            addRaw(QString("\n%1%2").arg(currentIndent).arg(output));+
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        }+
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        break;+
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    case tComment:+
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        {+
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            QString output("<!--%1-->");+
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            addRaw(output.arg(o.xo_text));+
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        }+
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        break;+
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    case tCDATA:+
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        {+
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            QString output("<![CDATA[\n%1\n]]>");+
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            addRaw(output.arg(o.xo_text));+
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        }+
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        break;+
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    }+
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    return *this;+
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}+
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+
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+
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// Output functions ----------------------------------------------------------+
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void XmlOutput::newTag(const QString &tag)+
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{+
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    Q_ASSERT_X(tag.count(), "XmlOutput", "Cannot open an empty tag");+
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    newTagOpen(tag);+
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    closeOpen();+
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}+
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+
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void XmlOutput::newTagOpen(const QString &tag)+
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{+
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    Q_ASSERT_X(tag.count(), "XmlOutput", "Cannot open an empty tag");+
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    closeOpen();+
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+
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    if (format == NewLine)+
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        xmlFile << endl << currentIndent;+
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    xmlFile << '<' << doConversion(tag);+
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    currentState = Attribute;+
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    tagStack.append(tag);+
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    increaseIndent(); // ---> indent+
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}+
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+
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void XmlOutput::closeOpen()+
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{+
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    switch(currentState) {+
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        case Bare:+
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        case Tag:+
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            return;+
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        case Attribute:+
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            break;+
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    }+
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    xmlFile << '>';+
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    currentState = Tag;+
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}+
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+
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void XmlOutput::closeTag()+
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{+
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    switch(currentState) {+
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        case Bare:+
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            if (tagStack.count())+
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                //warn_msg(WarnLogic, "<Root>: Cannot close tag in Bare state, %d tags on stack", tagStack.count());+
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                qDebug("<Root>: Cannot close tag in Bare state, %d tags on stack", tagStack.count());+
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            else+
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                //warn_msg(WarnLogic, "<Root>: Cannot close tag, no tags on stack");+
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                qDebug("<Root>: Cannot close tag, no tags on stack");+
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            return;+
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        case Tag:+
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            decreaseIndent(); // <--- Pre-decrease indent+
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            if (format == NewLine)+
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                xmlFile << endl << currentIndent;+
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            xmlFile << "</" << doConversion(tagStack.last()) << '>';+
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            tagStack.pop_back();+
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            break;+
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        case Attribute:+
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            xmlFile << "/>";+
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            tagStack.pop_back();+
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            currentState = Tag;+
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            decreaseIndent(); // <--- Post-decrease indent+
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            break;+
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    }+
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}+
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+
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void XmlOutput::closeTo(const QString &tag)+
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{+
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    bool cont = true;+
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    if (!tagStack.contains(tag) && !tag.isNull()) {+
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        //warn_msg(WarnLogic, "<%s>: Cannot close to tag <%s>, not on stack", tagStack.last().latin1(), tag.latin1());+
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        qDebug("<%s>: Cannot close to tag <%s>, not on stack", tagStack.last().toLatin1().constData(), tag.toLatin1().constData());+
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        return;+
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    }+
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    int left = tagStack.count();+
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    while (left-- && cont) {+
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        cont = tagStack.last().compare(tag) != 0;+
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        closeTag();+
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    }+
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}+
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+
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void XmlOutput::closeAll()+
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{+
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    if (!tagStack.count())+
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        return;+
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    closeTo(QString());+
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}+
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+
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void XmlOutput::addDeclaration(const QString &version, const QString &encoding)+
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{+
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    switch(currentState) {+
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        case Bare:+
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            break;+
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        case Tag:+
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        case Attribute:+
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            //warn_msg(WarnLogic, "<%s>: Cannot add declaration when not in bare state", tagStack.last().toLatin1().constData());+
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            qDebug("<%s>: Cannot add declaration when not in bare state", tagStack.last().toLatin1().constData());+
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            return;+
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    }+
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    QString outData = QString("<?xml version=\"%1\" encoding = \"%2\"?>")+
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                              .arg(doConversion(version))+
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                              .arg(doConversion(encoding));+
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    addRaw(outData);+
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}+
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+
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void XmlOutput::addRaw(const QString &rawText)+
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{+
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    closeOpen();+
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    xmlFile << rawText;+
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}+
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+
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void XmlOutput::addAttribute(const QString &attribute, const QString &value)+
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{+
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     switch(currentState) {+
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        case Bare:+
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        case Tag:+
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            //warn_msg(WarnLogic, "<%s>: Cannot add attribute since tags not open", tagStack.last().toLatin1().constData());+
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            qDebug("<%s>: Cannot add attribute (%s) since tag's not open",+
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                   (tagStack.count() ? tagStack.last().toLatin1().constData() : "Root"),+
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                   attribute.toLatin1().constData());+
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            return;+
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        case Attribute:+
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            break;+
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    }+
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    if (format == NewLine)+
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        xmlFile << endl;+
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    xmlFile << currentIndent << doConversion(attribute) << "=\"" << doConversion(value) << "\"";+
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}+
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+
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QT_END_NAMESPACE+
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