/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
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** This file is part of the QtDeclarative module of the Qt Toolkit.
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
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** packaging of this file.  Please review the following information to
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****************************************************************************/

#ifndef QMLXMLLISTMODEL_H
#define QMLXMLLISTMODEL_H

#include <QtDeclarative/qml.h>
#include <QtDeclarative/QListModelInterface>
#include <QtDeclarative/qmlinfo.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Declarative)

class QmlContext;
class Q_DECLARATIVE_EXPORT XmlListModelRole : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString name READ name WRITE setName)
    Q_PROPERTY(QString query READ query WRITE setQuery)

public:
    XmlListModelRole() {}
    ~XmlListModelRole() {}

    QString name() const { return m_name; }
    void setName(const QString &name) { m_name = name; }

    QString query() const { return m_query; }
    void setQuery(const QString &query)
    {
        if (query.startsWith(QLatin1Char('/'))) {
            qmlInfo(this) << "An XmlRole query must not start with '/'";
            return;
        }
        m_query = query;
    }

    bool isValid() {
        return !m_name.isEmpty() && !m_query.isEmpty();
    }

private:
    QString m_name;
    QString m_query;
};

class QmlXmlListModelPrivate;
class Q_DECLARATIVE_EXPORT QmlXmlListModel : public QListModelInterface, public QmlParserStatus
{
    Q_OBJECT
    Q_INTERFACES(QmlParserStatus)
    Q_ENUMS(Status)

    Q_PROPERTY(Status status READ status NOTIFY statusChanged)
    Q_PROPERTY(qreal progress READ progress NOTIFY progressChanged)
    Q_PROPERTY(QUrl source READ source WRITE setSource)
    Q_PROPERTY(QString query READ query WRITE setQuery)
    Q_PROPERTY(QString namespaceDeclarations READ namespaceDeclarations WRITE setNamespaceDeclarations)
    Q_PROPERTY(QmlList<XmlListModelRole *> *roles READ roleObjects)
    Q_CLASSINFO("DefaultProperty", "roles")

public:
    QmlXmlListModel(QObject *parent = 0);
    ~QmlXmlListModel();

    virtual QHash<int,QVariant> data(int index, const QList<int> &roles = (QList<int>())) const;
    virtual int count() const;
    virtual QList<int> roles() const;
    virtual QString toString(int role) const;

    QmlList<XmlListModelRole *> *roleObjects();

    QUrl source() const;
    void setSource(const QUrl&);

    QString query() const;
    void setQuery(const QString&);

    QString namespaceDeclarations() const;
    void setNamespaceDeclarations(const QString&);

    enum Status { Idle, Loading, Error };
    Status status() const;
    qreal progress() const;

    virtual void classBegin();
    virtual void componentComplete();

signals:
    void statusChanged(Status);
    void progressChanged(qreal progress);

public Q_SLOTS:
    void reload();

private Q_SLOTS:
    void requestFinished();
    void requestProgress(qint64,qint64);
    void queryCompleted(int,int);

private:
    Q_DECLARE_PRIVATE(QmlXmlListModel)
    Q_DISABLE_COPY(QmlXmlListModel)
};

QT_END_NAMESPACE

QML_DECLARE_TYPE(XmlListModelRole)
QML_DECLARE_TYPE(QmlXmlListModel)

QT_END_HEADER

#endif // QMLXMLLISTMODEL_H