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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqmlabstractexpression_p.h"
QT_BEGIN_NAMESPACE
QQmlAbstractExpression::QQmlAbstractExpression()
: m_prevExpression(0), m_nextExpression(0)
{
}
QQmlAbstractExpression::~QQmlAbstractExpression()
{
if (m_prevExpression) {
*m_prevExpression = m_nextExpression;
if (m_nextExpression)
m_nextExpression->m_prevExpression = m_prevExpression;
}
if (m_context.isT2())
m_context.asT2()->_s = 0;
}
QQmlContextData *QQmlAbstractExpression::context() const
{
if (m_context.isT1()) return m_context.asT1();
else return m_context.asT2()->_c;
}
void QQmlAbstractExpression::setContext(QQmlContextData *context)
{
if (m_prevExpression) {
*m_prevExpression = m_nextExpression;
if (m_nextExpression)
m_nextExpression->m_prevExpression = m_prevExpression;
m_prevExpression = 0;
m_nextExpression = 0;
}
if (m_context.isT1()) m_context = context;
else m_context.asT2()->_c = context;
if (context) {
m_nextExpression = context->expressions;
if (m_nextExpression)
m_nextExpression->m_prevExpression = &m_nextExpression;
m_prevExpression = &context->expressions;
context->expressions = this;
}
}
void QQmlAbstractExpression::refresh()
{
}
bool QQmlAbstractExpression::isValid() const
{
return context() != 0;
}
QT_END_NAMESPACE
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