- Qt 5.5
- Qt XML
- SAX Bookmarks Example
- xbelgenerator.cpp Example File
- Qt 5.5.1 Reference Documentation

# xbelgenerator.cpp Example File

saxbookmarks/xbelgenerator.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    #include <QtWidgets>

    #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";
        }
    }