/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** 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
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
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**************************************************************************/

#ifndef MODELNODEPOSITIONSTORAGE_H
#define MODELNODEPOSITIONSTORAGE_H

#include "modelnode.h"

namespace QmlDesigner {
namespace Internal {

class ModelNodePositionStorage
{
public:
    void clear()
    { m_rewriterData.clear(); }

    int nodeOffset(const ModelNode &modelNode);
    void setNodeOffset(const ModelNode &modelNode, int fileOffset);
    void cleanupInvalidOffsets();
    void removeNodeOffset(const ModelNode &node)
    { m_rewriterData.remove(node); }

    QList<ModelNode> modelNodes() const;

public:
    static const int INVALID_LOCATION = -1;

private:
    class RewriterData { //custom rewriter data for each node can be kept here
    public:
        RewriterData(int offset = INVALID_LOCATION)
            : _offset(offset)
        {}

        bool isValid() const
        { return _offset != INVALID_LOCATION; }

        int offset() const
        { return _offset; }

        void setOffset(int offset)
        { _offset = offset; }

    private:
        int _offset;
    };

private:
    QHash<ModelNode, RewriterData> m_rewriterData;
};

} // namespace Internal
} // namespace QmlDesigner

#endif // MODELNODEPOSITIONSTORAGE_H
