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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "qitem_p.h"
#include "qintersectiterator_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
IntersectIterator::IntersectIterator(const Item::Iterator::Ptr &it1,
const Item::Iterator::Ptr &it2) : m_it1(it1),
m_it2(it2),
m_position(0),
m_node1(m_it1->next()),
m_node2(m_it2->next())
{
Q_ASSERT(m_it1);
Q_ASSERT(m_it2);
}
Item IntersectIterator::next()
{
if(!m_node1 || !m_node2)
return closedExit();
do
{
if(m_node1.asNode().model() == m_node2.asNode().model())
{
switch(m_node1.asNode().compareOrder(m_node2.asNode()))
{
case QXmlNodeModelIndex::Precedes:
{
m_node1 = m_it1->next();
break;
}
case QXmlNodeModelIndex::Follows:
{
m_node2 = m_it2->next();
break;
}
default:
{
m_current = m_node2;
m_node1 = m_it1->next();
m_node2 = m_it2->next();
++m_position;
return m_current;
}
}
}
else
m_node2 = m_it2->next();
}
while(m_node1 && m_node2);
return Item();
}
Item IntersectIterator::current() const
{
return m_current;
}
xsInteger IntersectIterator::position() const
{
return m_position;
}
Item::Iterator::Ptr IntersectIterator::copy() const
{
return Item::Iterator::Ptr(new IntersectIterator(m_it1->copy(), m_it2->copy()));
}
QT_END_NAMESPACE
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