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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 "qremovaliterator_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
RemovalIterator::RemovalIterator(const Item::Iterator::Ptr &target,
const xsInteger pos) : m_target(target),
m_removalPos(pos),
m_position(0)
{
Q_ASSERT(target);
Q_ASSERT(pos >= 1);
}
Item RemovalIterator::next()
{
if(m_position == -1)
return Item();
m_current = m_target->next();
if(!m_current)
{
m_position = -1;
m_current.reset();
return Item();
}
++m_position;
if(m_position == m_removalPos)
{
next(); /* Recurse, return the next item. */
--m_position; /* Don't count the one we removed. */
return m_current;
}
return m_current;
}
xsInteger RemovalIterator::count()
{
const xsInteger itc = m_target->count();
if(itc < m_removalPos)
return itc;
else
return itc - 1;
}
Item RemovalIterator::current() const
{
return m_current;
}
xsInteger RemovalIterator::position() const
{
return m_position;
}
Item::Iterator::Ptr RemovalIterator::copy() const
{
return Item::Iterator::Ptr(new RemovalIterator(m_target->copy(), m_removalPos));
}
QT_END_NAMESPACE
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