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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/rendering/OrderIterator.h"
#include "core/rendering/RenderBox.h"
namespace WebCore {
OrderIterator::OrderIterator(const RenderBox* containerBox)
: m_containerBox(containerBox)
, m_currentChild(0)
, m_isReset(false)
{
}
RenderBox* OrderIterator::first()
{
reset();
return next();
}
RenderBox* OrderIterator::next()
{
do {
if (!m_currentChild) {
if (m_orderValuesIterator == m_orderValues.end())
return 0;
if (!m_isReset) {
++m_orderValuesIterator;
if (m_orderValuesIterator == m_orderValues.end())
return 0;
} else {
m_isReset = false;
}
m_currentChild = m_containerBox->firstChildBox();
} else {
m_currentChild = m_currentChild->nextSiblingBox();
}
} while (!m_currentChild || m_currentChild->style()->order() != *m_orderValuesIterator);
return m_currentChild;
}
void OrderIterator::reset()
{
m_currentChild = 0;
m_orderValuesIterator = m_orderValues.begin();
m_isReset = true;
}
OrderIteratorPopulator::~OrderIteratorPopulator()
{
m_iterator.reset();
}
void OrderIteratorPopulator::collectChild(const RenderBox* child)
{
m_iterator.m_orderValues.insert(child->style()->order());
}
} // namespace WebCore
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