/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui>

#include "xbelhandler.h"

XbelHandler::XbelHandler(QTreeWidget *treeWidget)
    : treeWidget(treeWidget)
{
    item = 0;
    metXbelTag = false;

    QStyle *style = treeWidget->style();

    folderIcon.addPixmap(style->standardPixmap(QStyle::SP_DirClosedIcon),
                         QIcon::Normal, QIcon::Off);
    folderIcon.addPixmap(style->standardPixmap(QStyle::SP_DirOpenIcon),
                         QIcon::Normal, QIcon::On);
    bookmarkIcon.addPixmap(style->standardPixmap(QStyle::SP_FileIcon));
}

bool XbelHandler::startElement(const QString & /* namespaceURI */,
                               const QString & /* localName */,
                               const QString &qName,
                               const QXmlAttributes &attributes)
{
    if (!metXbelTag && qName != "xbel") {
        errorStr = QObject::tr("The file is not an XBEL file.");
        return false;
    }

    if (qName == "xbel") {
        QString version = attributes.value("version");
        if (!version.isEmpty() && version != "1.0") {
            errorStr = QObject::tr("The file is not an XBEL version 1.0 file.");
            return false;
        }
        metXbelTag = true;
    } else if (qName == "folder") {
        item = createChildItem(qName);
        item->setFlags(item->flags() | Qt::ItemIsEditable);
        item->setIcon(0, folderIcon);
        item->setText(0, QObject::tr("Folder"));
        bool folded = (attributes.value("folded") != "no");
        treeWidget->setItemExpanded(item, !folded);
    } else if (qName == "bookmark") {
        item = createChildItem(qName);
        item->setFlags(item->flags() | Qt::ItemIsEditable);
        item->setIcon(0, bookmarkIcon);
        item->setText(0, QObject::tr("Unknown title"));
        item->setText(1, attributes.value("href"));
    } else if (qName == "separator") {
        item = createChildItem(qName);
        item->setFlags(item->flags() & ~Qt::ItemIsSelectable);
        item->setText(0, QString(30, 0xB7));
    }

    currentText.clear();
    return true;
}

bool XbelHandler::endElement(const QString & /* namespaceURI */,
                             const QString & /* localName */,
                             const QString &qName)
{
    if (qName == "title") {
        if (item)
            item->setText(0, currentText);
    } else if (qName == "folder" || qName == "bookmark"
               || qName == "separator") {
        item = item->parent();
    }
    return true;
}

bool XbelHandler::characters(const QString &str)
{
    currentText += str;
    return true;
}

bool XbelHandler::fatalError(const QXmlParseException &exception)
{
    QMessageBox::information(treeWidget->window(), QObject::tr("SAX Bookmarks"),
                             QObject::tr("Parse error at line %1, column %2:\n"
                                         "%3")
                             .arg(exception.lineNumber())
                             .arg(exception.columnNumber())
                             .arg(exception.message()));
    return false;
}

QString XbelHandler::errorString() const
{
    return errorStr;
}

QTreeWidgetItem *XbelHandler::createChildItem(const QString &tagName)
{
    QTreeWidgetItem *childItem;
    if (item) {
        childItem = new QTreeWidgetItem(item);
    } else {
        childItem = new QTreeWidgetItem(treeWidget);
    }
    childItem->setData(0, Qt::UserRole, tagName);
    return childItem;
}