/****************************************************************************
**
** 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 <QtCore/QFileInfo>
#include <QtCore/QDir>
#include <QtCore/QVector>
#include <QtXmlPatterns/QSimpleXmlNodeModel>

class FileTree : public QSimpleXmlNodeModel
{
public:
    FileTree(const QXmlNamePool &namePool);

    QXmlNodeModelIndex nodeFor(const QString &fileName) const;

    virtual QXmlNodeModelIndex::DocumentOrder compareOrder(const QXmlNodeModelIndex&, const QXmlNodeModelIndex&) const;
    virtual QXmlName name(const QXmlNodeModelIndex &node) const;
    virtual QUrl documentUri(const QXmlNodeModelIndex &node) const;
    virtual QXmlNodeModelIndex::NodeKind kind(const QXmlNodeModelIndex &node) const;
    virtual QXmlNodeModelIndex root(const QXmlNodeModelIndex &node) const;
    virtual QVariant typedValue(const QXmlNodeModelIndex &node) const;
protected:
    virtual QVector<QXmlNodeModelIndex> attributes(const QXmlNodeModelIndex &element) const;
    virtual QXmlNodeModelIndex nextFromSimpleAxis(SimpleAxis, const QXmlNodeModelIndex&) const;

private:
    enum Type {
        File,
        Directory,
        AttributeFileName,
        AttributeFilePath,
        AttributeSize,
        AttributeMIMEType,
        AttributeSuffix
    };

    inline QXmlNodeModelIndex nextSibling(const QXmlNodeModelIndex &nodeIndex,
                                          const QFileInfo &from,
                                          qint8 offset) const;
    inline const QFileInfo &toFileInfo(const QXmlNodeModelIndex &index) const;
    inline QXmlNodeModelIndex toNodeIndex(const QFileInfo &index,
                                          Type attributeName) const;
    inline QXmlNodeModelIndex toNodeIndex(const QFileInfo &index) const;

    /*
     One possible improvement is to use a hash, and use the &*&value()
     trick to get a pointer, which would be stored in data() instead
     of the index.
    */
    mutable QVector<QFileInfo>  m_fileInfos;
    const QDir::Filters         m_filterAllowAll;
    const QDir::SortFlags       m_sortFlags;
    QVector<QXmlName>           m_names;
};