/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#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";
    }
}