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#include <QSimpleXmlNodeModel>
#include <QVector>

class LoadingModel : public QSimpleXmlNodeModel
{
public:
    virtual ~LoadingModel();
    static QAbstractXmlNodeModel::Ptr create(const QXmlNamePool &np);

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

private:
    friend class Loader;
    class Node
    {
    public:
        inline Node(const QXmlNodeModelIndex::NodeKind k,
                    const Node *const p,
                    const QString &v = QString(),
                    const QXmlName &n = QXmlName()) : kind(k)
                                                    , value(v)
                                                    , parent(p)
                                                    , precedingSibling(0)
                                                    , followingSibling(0)
                                                    , firstChild(0)
                                                    , name(n)
        {
        }

        typedef QVector<const Node *> Vector;
        QXmlNodeModelIndex::NodeKind    kind;
        QString                         value;
        const Node *                    parent;
        const Node *                    precedingSibling;
        const Node *                    followingSibling;
        const Node *                    firstChild;
        Node::Vector                    attributes;
        QXmlName                        name;
    };

    inline const Node *toInternal(const QXmlNodeModelIndex &ni) const;
    inline QXmlNodeModelIndex createIndex(const Node *const internal) const;

    LoadingModel(const Node::Vector &content,
                 const QXmlNamePool &np);

    Node::Vector m_nodes;
};