/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef Patternist_QObjectNodeModel_H

#define Patternist_QObjectNodeModel_H

#include <QSimpleXmlNodeModel>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QObject;

class PropertyToAtomicValue;

/**

 * @short Delegates QtCore's QObject into Patternist's QAbstractXmlNodeModel.

 * known as pre/post numbering.

 *

 * QObjectXmlModel sets the toggle on QXmlNodeModelIndex to @c true, if it

 * represents a property of the QObject. That is, if the QXmlNodeModelIndex is

 * an attribute.

 *

 * @author Frans Englich <frans.englich@nokia.com>

 */

class QObjectXmlModel : public QSimpleXmlNodeModel

{

  public:

    QObjectXmlModel(QObject *const object, const QXmlNamePool &np);

    QXmlNodeModelIndex root() const;

//! [0]

    virtual QXmlNodeModelIndex::DocumentOrder compareOrder(const QXmlNodeModelIndex &n1, const QXmlNodeModelIndex &n2) const;

    virtual QXmlName name(const QXmlNodeModelIndex &n) const;

    virtual QUrl documentUri(const QXmlNodeModelIndex &n) const;

    virtual QXmlNodeModelIndex::NodeKind kind(const QXmlNodeModelIndex &n) const;

    virtual QXmlNodeModelIndex root(const QXmlNodeModelIndex &n) const;

    virtual QVariant typedValue(const QXmlNodeModelIndex &n) const;

    virtual QVector<QXmlNodeModelIndex> attributes(const QXmlNodeModelIndex&) const;

    virtual QXmlNodeModelIndex nextFromSimpleAxis(SimpleAxis, const QXmlNodeModelIndex&) const;

//! [0]

  private:

    /**

     * The highest three bits are used to signify whether the node index

     * is an artificial node.

     *

     * @short if QXmlNodeModelIndex::additionalData() has the

     * QObjectPropery flag set, then the QXmlNodeModelIndex is an

     * attribute of the QObject element, and the remaining bits form

     * an offset to the QObject property that the QXmlNodeModelIndex

     * refers to.

     *

     */

//! [3]

    enum QObjectNodeType

    {

        IsQObject               = 0,

        QObjectProperty         = 1 << 26,

        MetaObjects             = 2 << 26,

        MetaObject              = 3 << 26,

        MetaObjectClassName     = 4 << 26,

        MetaObjectSuperClass    = 5 << 26,

        QObjectClassName        = 6 << 26

    };

//! [3]

//! [1]

    typedef QVector<const QMetaObject *> AllMetaObjects;

//! [1]

    AllMetaObjects allMetaObjects() const;

    static QObjectNodeType toNodeType(const QXmlNodeModelIndex &n);

    static bool isTypeSupported(QVariant::Type type);

    static inline QObject *asQObject(const QXmlNodeModelIndex &n);

    static inline bool isProperty(const QXmlNodeModelIndex n);

    static inline QMetaProperty toMetaProperty(const QXmlNodeModelIndex &n);

    /**

     * Returns the ancestors of @p n. Does therefore not include

     * @p n.

     */

    inline QXmlNodeModelIndex::List ancestors(const QXmlNodeModelIndex n) const;

    QXmlNodeModelIndex qObjectSibling(const int pos,

                                      const QXmlNodeModelIndex &n) const;

    QXmlNodeModelIndex metaObjectSibling(const int pos,

                                         const QXmlNodeModelIndex &n) const;

//! [2]

    const QUrl              m_baseURI;

    QObject *const          m_root;

//! [4]

    const AllMetaObjects    m_allMetaObjects;

//! [4]

//! [2]

};

QT_END_NAMESPACE

QT_END_HEADER

#endif