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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#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;
};
}
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