source: trunk/src/xmlpatterns/api/qabstractxmlnodemodel.h@ 846

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#ifndef QABSTRACTXMLNODEMODEL_H
#define QABSTRACTXMLNODEMODEL_H

#include <QtXmlPatterns/QXmlName>
#include <QtCore/QSharedData>
#include <QtCore/QScopedPointer>

QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE

QT_MODULE(XmlPatterns)

/* This file contains the classes QXmlNodeModelIndex, QAbstractXmlNodeModel,
 * QXmlItem and QPatternist::NodeIndexStorage. */

class QAbstractXmlNodeModel;
class QAbstractXmlNodeModelPrivate;
class QAbstractXmlReceiver;
class QSourceLocation;
class QUrl;
class QXmlName;
class QXmlNodeModelIndex;
template<typename T> class QAbstractXmlForwardIterator;
template<typename T> class QVector;

/* The members in the namespace QPatternist are internal, not part of the public API, and
 * unsupported. Using them leads to undefined behavior. */
namespace QPatternist
{
    class DynamicContext;
    class Item;
    class ItemType;
    class XsdValidatedXmlNodeModel;
    template<typename TResult, typename TSource, typename TMapper, typename Context> class ItemMappingIterator;
    template<typename TResult, typename TSource, typename TMapper> class SequenceMappingIterator;
    typedef QExplicitlySharedDataPointer<ItemType> ItemTypePtr;
    typedef QExplicitlySharedDataPointer<QAbstractXmlForwardIterator<Item> > ItemIteratorPtr;
    typedef QVector<QXmlName> QXmlNameVector;

    class NodeIndexStorage
    {
    public:
        typedef qint64 Data;

        /*!
          \note Changing merely the order of these two members, ptr and data,
                is a binary incompatible change on Mac Power PC.
         */
        union
        {
            void *ptr; // Do not use ptr directy, use pointer() instead.
            Data data;
        };
        void *pointer() const
        {
            /* Constructing to qptrdiff means we avoid the warning "cast to pointer
             * from integer of different size."
             */
            return (void *)qptrdiff(data);
        }

        Data additionalData;
        const QAbstractXmlNodeModel *model;

        /* Implementation is in qabstractxmlnodemodel.cpp. */
        inline bool operator!=(const NodeIndexStorage &other) const;
    };
}

class Q_XMLPATTERNS_EXPORT QXmlNodeModelIndex
{
    enum Constants
    {
        ForwardAxis         = 8192,
        ReverseAxis         = 16384
    };

public:
    inline QXmlNodeModelIndex()
    {
        reset();