/****************************************************************************+
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**+
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** Copyright (C) 2010 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 demonstration applications 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 "xbel.h"+
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+
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#include <QtCore/QFile>+
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+
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BookmarkNode::BookmarkNode(BookmarkNode::Type type, BookmarkNode *parent) :+
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     expanded(false)+
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   , m_parent(parent)+
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   , m_type(type)+
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{+
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    if (parent)+
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        parent->add(this);+
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}+
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+
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BookmarkNode::~BookmarkNode()+
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{+
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    if (m_parent)+
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        m_parent->remove(this);+
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    qDeleteAll(m_children);+
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    m_parent = 0;+
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    m_type = BookmarkNode::Root;+
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}+
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+
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bool BookmarkNode::operator==(const BookmarkNode &other)+
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{+
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    if (url != other.url+
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        || title != other.title+
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        || desc != other.desc+
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        || expanded != other.expanded+
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        || m_type != other.m_type+
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        || m_children.count() != other.m_children.count())+
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        return false;+
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+
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    for (int i = 0; i < m_children.count(); ++i)+
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        if (!((*(m_children[i])) == (*(other.m_children[i]))))+
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            return false;+
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    return true;+
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}+
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+
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BookmarkNode::Type BookmarkNode::type() const+
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{+
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    return m_type;+
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}+
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+
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void BookmarkNode::setType(Type type)+
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{+
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    m_type = type;+
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}+
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+
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QList<BookmarkNode *> BookmarkNode::children() const+
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{+
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    return m_children;+
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}+
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+
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BookmarkNode *BookmarkNode::parent() const+
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{+
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    return m_parent;+
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}+
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+
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void BookmarkNode::add(BookmarkNode *child, int offset)+
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{+
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    Q_ASSERT(child->m_type != Root);+
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    if (child->m_parent)+
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        child->m_parent->remove(child);+
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    child->m_parent = this;+
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    if (-1 == offset)+
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        offset = m_children.size();+
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    m_children.insert(offset, child);+
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}+
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+
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void BookmarkNode::remove(BookmarkNode *child)+
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{+
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    child->m_parent = 0;+
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    m_children.removeAll(child);+
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}+
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+
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+
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XbelReader::XbelReader()+
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{+
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}+
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+
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BookmarkNode *XbelReader::read(const QString &fileName)+
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{+
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    QFile file(fileName);+
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    if (!file.exists()) {+
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        return new BookmarkNode(BookmarkNode::Root);+
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    }+
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    file.open(QFile::ReadOnly);+
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    return read(&file);+
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}+
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+
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BookmarkNode *XbelReader::read(QIODevice *device)+
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{+
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    BookmarkNode *root = new BookmarkNode(BookmarkNode::Root);+
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    setDevice(device);+
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    if (readNextStartElement()) {+
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        QString version = attributes().value(QLatin1String("version")).toString();+
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        if (name() == QLatin1String("xbel")+
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            && (version.isEmpty() || version == QLatin1String("1.0"))) {+
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            readXBEL(root);+
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        } else {+
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            raiseError(QObject::tr("The file is not an XBEL version 1.0 file."));+
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        }+
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    }+
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    return root;+
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}+
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+
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void XbelReader::readXBEL(BookmarkNode *parent)+
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{+
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    Q_ASSERT(isStartElement() && name() == QLatin1String("xbel"));+
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+
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    while (readNextStartElement()) {+
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        if (name() == QLatin1String("folder"))+
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            readFolder(parent);+
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        else if (name() == QLatin1String("bookmark"))+
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            readBookmarkNode(parent);+
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        else if (name() == QLatin1String("separator"))+
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            readSeparator(parent);+
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        else+
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            skipCurrentElement();+
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    }+
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}+
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+
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void XbelReader::readFolder(BookmarkNode *parent)+
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{+
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    Q_ASSERT(isStartElement() && name() == QLatin1String("folder"));+
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+
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    BookmarkNode *folder = new BookmarkNode(BookmarkNode::Folder, parent);+
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    folder->expanded = (attributes().value(QLatin1String("folded")) == QLatin1String("no"));+
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+
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    while (readNextStartElement()) {+
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        if (name() == QLatin1String("title"))+
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            readTitle(folder);+
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        else if (name() == QLatin1String("desc"))+
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            readDescription(folder);+
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        else if (name() == QLatin1String("folder"))+
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            readFolder(folder);+
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        else if (name() == QLatin1String("bookmark"))+
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            readBookmarkNode(folder);+
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        else if (name() == QLatin1String("separator"))+
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            readSeparator(folder);+
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        else+
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            skipCurrentElement();+
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    }+
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}+
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+
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void XbelReader::readTitle(BookmarkNode *parent)+
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{+
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    Q_ASSERT(isStartElement() && name() == QLatin1String("title"));+
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    parent->title = readElementText();+
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}+
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+
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void XbelReader::readDescription(BookmarkNode *parent)+
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{+
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    Q_ASSERT(isStartElement() && name() == QLatin1String("desc"));+
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    parent->desc = readElementText();+
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}+
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+
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void XbelReader::readSeparator(BookmarkNode *parent)+
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{+
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    new BookmarkNode(BookmarkNode::Separator, parent);+
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    // empty elements have a start and end element+
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    readNext();+
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}+
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+
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void XbelReader::readBookmarkNode(BookmarkNode *parent)+
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{+
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    Q_ASSERT(isStartElement() && name() == QLatin1String("bookmark"));+
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    BookmarkNode *bookmark = new BookmarkNode(BookmarkNode::Bookmark, parent);+
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    bookmark->url = attributes().value(QLatin1String("href")).toString();+
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    while (readNextStartElement()) {+
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        if (name() == QLatin1String("title"))+
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            readTitle(bookmark);+
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        else if (name() == QLatin1String("desc"))+
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            readDescription(bookmark);+
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        else+
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            skipCurrentElement();+
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    }+
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    if (bookmark->title.isEmpty())+
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        bookmark->title = QObject::tr("Unknown title");+
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}+
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+
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+
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XbelWriter::XbelWriter()+
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{+
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    setAutoFormatting(true);+
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}+
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+
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bool XbelWriter::write(const QString &fileName, const BookmarkNode *root)+
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{+
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    QFile file(fileName);+
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    if (!root || !file.open(QFile::WriteOnly))+
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        return false;+
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    return write(&file, root);+
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}+
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+
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bool XbelWriter::write(QIODevice *device, const BookmarkNode *root)+
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{+
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    setDevice(device);+
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+
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    writeStartDocument();+
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    writeDTD(QLatin1String("<!DOCTYPE xbel>"));+
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    writeStartElement(QLatin1String("xbel"));+
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    writeAttribute(QLatin1String("version"), QLatin1String("1.0"));+
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    if (root->type() == BookmarkNode::Root) {+
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        for (int i = 0; i < root->children().count(); ++i)+
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            writeItem(root->children().at(i));+
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    } else {+
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        writeItem(root);+
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    }+
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+
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    writeEndDocument();+
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    return true;+
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}+
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+
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void XbelWriter::writeItem(const BookmarkNode *parent)+
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{+
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    switch (parent->type()) {+
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    case BookmarkNode::Folder:+
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        writeStartElement(QLatin1String("folder"));+
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        writeAttribute(QLatin1String("folded"), parent->expanded ? QLatin1String("no") : QLatin1String("yes"));+
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        writeTextElement(QLatin1String("title"), parent->title);+
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        for (int i = 0; i < parent->children().count(); ++i)+
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            writeItem(parent->children().at(i));+
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        writeEndElement();+
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        break;+
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    case BookmarkNode::Bookmark:+
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        writeStartElement(QLatin1String("bookmark"));+
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        if (!parent->url.isEmpty())+
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            writeAttribute(QLatin1String("href"), parent->url);+
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        writeTextElement(QLatin1String("title"), parent->title);+
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        if (!parent->desc.isEmpty())+
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            writeAttribute(QLatin1String("desc"), parent->desc);+
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        writeEndElement();+
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        break;+
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    case BookmarkNode::Separator:+
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        writeEmptyElement(QLatin1String("separator"));+
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        break;+
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    default:+
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        break;+
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    }+
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}+
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+
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