/****************************************************************************
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the QtQml module of the Qt Toolkit.
**
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
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** 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 QACCESSIBLEQUICKITEM_H
#define QACCESSIBLEQUICKITEM_H

#include <QtQuick/QQuickItem>
#include <QtQuick/QQuickView>
#include "qqmlaccessible.h"

QT_BEGIN_NAMESPACE

#ifndef QT_NO_ACCESSIBILITY

class QAccessibleQuickItem : public QQmlAccessible, public QAccessibleValueInterface, public QAccessibleTextInterface
{
public:
    QAccessibleQuickItem(QQuickItem *item);

    QRect rect() const;
    QRect viewRect() const;

    bool clipsChildren() const;

    QAccessibleInterface *parent() const;
    QAccessibleInterface *child(int index) const;
    int childCount() const;
    int indexOfChild(const QAccessibleInterface *iface) const;
    QList<QQuickItem *> childItems() const;

    QAccessible::State state() const;
    QAccessible::Role role() const;
    QString text(QAccessible::Text) const;

    bool isAccessible() const;

    // Value Interface
    QVariant currentValue() const;
    void setCurrentValue(const QVariant &value);
    QVariant maximumValue() const;
    QVariant minimumValue() const;
    QVariant minimumStepSize() const;


    // Text Interface
    // selection (ignored for now)
    void selection(int selectionIndex, int *startOffset, int *endOffset) const { *startOffset = 0; *endOffset = 0; }
    int selectionCount() const { return 0; }
    void addSelection(int startOffset, int endOffset) {}
    void removeSelection(int selectionIndex) {}
    void setSelection(int selectionIndex, int startOffset, int endOffset) {}

    // cursor
    int cursorPosition() const { return 0; }
    void setCursorPosition(int position) {}

    // text
    QString text(int startOffset, int endOffset) const { return text(QAccessible::Name).mid(startOffset, endOffset - startOffset); }
//    QString textBeforeOffset(int offset, QAccessible2::BoundaryType boundaryType,
//                                     int *startOffset, int *endOffset) const;
//    QString textAfterOffset(int offset, QAccessible2::BoundaryType boundaryType,
//                                    int *startOffset, int *endOffset) const;
//    QString textAtOffset(int offset, QAccessible2::BoundaryType boundaryType,
//                                 int *startOffset, int *endOffset) const;
    int characterCount() const { return text(QAccessible::Name).count(); }

    // character <-> geometry
    QRect characterRect(int offset) const { return QRect(); }
    int offsetAtPoint(const QPoint &point) const { return -1; }

    void scrollToSubstring(int startIndex, int endIndex) {}
    QString attributes(int offset, int *startOffset, int *endOffset) const { return QString(); }

protected:
    QQuickItem *item() const { return static_cast<QQuickItem*>(object()); }
    void *interface_cast(QAccessible::InterfaceType t);
};

QRect itemScreenRect(QQuickItem *item);


#endif // QT_NO_ACCESSIBILITY

QT_END_NAMESPACE

#endif // QACCESSIBLEQUICKITEM_H
