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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** No Commercial Usage
**
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#ifndef MODIFICATIONGROUPTOKEN_H
#define MODIFICATIONGROUPTOKEN_H
#include <corelib_global.h>
namespace QmlDesigner {
namespace Internal {
class ModelRewriter;
class ModelPrivate;
}
/*!
\class QmlDesigner::ModificationGroupToken
\ingroup CoreModel
\brief TBD
*/
class CORESHARED_EXPORT ModificationGroupToken
{
friend class Internal::ModelRewriter;
friend class Internal::ModelPrivate;
public:
ModificationGroupToken(): m_depth(0), m_uniqueNumber(-1) {}
unsigned depth() const { return m_depth; }
bool isValid() const { return m_uniqueNumber != -1; }
bool operator==(const ModificationGroupToken& token) const { return m_uniqueNumber == token.m_uniqueNumber; }
bool operator!=(const ModificationGroupToken& token) const { return m_uniqueNumber != token.m_uniqueNumber; }
private:
void makeInvalid() { m_uniqueNumber = -1; }
ModificationGroupToken(unsigned depth);
private:
static long uniqueNumberCounter;
unsigned m_depth;
long m_uniqueNumber;
};
}
#endif // MODIFICATIONGROUPTOKEN_H
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