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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2004, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef TreeWalker_h
#define TreeWalker_h
#include "NodeFilter.h"
#include "ScriptWrappable.h"
#include "Traversal.h"
#include <wtf/RefCounted.h>
namespace WebCore {
typedef int ExceptionCode;
class TreeWalker : public ScriptWrappable, public RefCounted<TreeWalker>, public NodeIteratorBase {
public:
static Ref<TreeWalker> create(Node& rootNode, unsigned long whatToShow, RefPtr<NodeFilter>&& filter)
{
return adoptRef(*new TreeWalker(rootNode, whatToShow, WTFMove(filter)));
}
Node* currentNode() const { return m_current.get(); }
void setCurrentNode(Node*, ExceptionCode&);
Node* parentNode();
Node* firstChild();
Node* lastChild();
Node* previousSibling();
Node* nextSibling();
Node* previousNode();
Node* nextNode();
private:
TreeWalker(Node&, unsigned long whatToShow, RefPtr<NodeFilter>&&);
enum class SiblingTraversalType { Previous, Next };
template<SiblingTraversalType> Node* traverseSiblings();
Node* setCurrent(RefPtr<Node>&&);
RefPtr<Node> m_current;
};
} // namespace WebCore
#endif // TreeWalker_h
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