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# xbelgenerator.cpp Example File
xml/saxbookmarks/xbelgenerator.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QtGui>

    #include "xbelgenerator.h"

    XbelGenerator::XbelGenerator(QTreeWidget *treeWidget)
        : treeWidget(treeWidget)
    {
    }

    bool XbelGenerator::write(QIODevice *device)
    {
        out.setDevice(device);
        out.setCodec("UTF-8");
        out << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
            << "<!DOCTYPE xbel>\n"
            << "<xbel version=\"1.0\">\n";

        for (int i = 0; i < treeWidget->topLevelItemCount(); ++i)
            generateItem(treeWidget->topLevelItem(i), 1);

        out << "</xbel>\n";
        return true;
    }

    QString XbelGenerator::indent(int depth)
    {
        const int IndentSize = 4;
        return QString(IndentSize * depth, ' ');
    }

    QString XbelGenerator::escapedText(const QString &str)
    {
        QString result = str;
        result.replace("&", "&amp;");
        result.replace("<", "&lt;");
        result.replace(">", "&gt;");
        return result;
    }

    QString XbelGenerator::escapedAttribute(const QString &str)
    {
        QString result = escapedText(str);
        result.replace("\"", "&quot;");
        result.prepend("\"");
        result.append("\"");
        return result;
    }

    void XbelGenerator::generateItem(QTreeWidgetItem *item, int depth)
    {
        QString tagName = item->data(0, Qt::UserRole).toString();
        if (tagName == "folder") {
            bool folded = !treeWidget->isItemExpanded(item);
            out << indent(depth) << "<folder folded=\"" << (folded ? "yes" : "no")
                                 << "\">\n"
                << indent(depth + 1) << "<title>" << escapedText(item->text(0))
                                     << "</title>\n";

            for (int i = 0; i < item->childCount(); ++i)
                generateItem(item->child(i), depth + 1);

            out << indent(depth) << "</folder>\n";
        } else if (tagName == "bookmark") {
            out << indent(depth) << "<bookmark";
            if (!item->text(1).isEmpty())
                out << " href=" << escapedAttribute(item->text(1));
            out << ">\n"
                << indent(depth + 1) << "<title>" << escapedText(item->text(0))
                                     << "</title>\n"
                << indent(depth) << "</bookmark>\n";
        } else if (tagName == "separator") {
            out << indent(depth) << "<separator/>\n";
        }
    }