/*
* 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.
*/
#ifndef OrderIterator_h
#define OrderIterator_h
#include "wtf/Noncopyable.h"
#include "wtf/Vector.h"
#include <set>
namespace WebCore {
class RenderBox;
class OrderIterator {
WTF_MAKE_NONCOPYABLE(OrderIterator);
public:
friend class OrderIteratorPopulator;
OrderIterator(const RenderBox*);
RenderBox* currentChild() const { return m_currentChild; }
RenderBox* first();
RenderBox* next();
void reset();
private:
RenderBox* firstChildBox();
RenderBox* nextSiblingBox();
// If |m_children| is not empty, we will use it to iterate over this fixed subset.
const RenderBox* m_containerBox;
Vector<RenderBox*> m_children;
RenderBox* m_currentChild;
size_t m_childIndex;
typedef std::set<int> OrderValues;
OrderValues m_orderValues;
OrderValues::const_iterator m_orderValuesIterator;
bool m_isReset;
};
class OrderIteratorPopulator {
public:
explicit OrderIteratorPopulator(OrderIterator& iterator)
: m_iterator(iterator)
{
m_iterator.m_orderValues.clear();
}
~OrderIteratorPopulator();
void storeChild(RenderBox*);
void collectChild(const RenderBox*);
private:
OrderIterator& m_iterator;
};
} // namespace WebCore
#endif // OrderIterator_h