blob: e1eec74ba3ab41e1279014a8e60e7431693d0254 [file] [log] [blame]
/*
* 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.
*
*/
#pragma once
#include "ExceptionOr.h"
#include "NodeFilter.h"
#include "ScriptWrappable.h"
#include "Traversal.h"
#include <wtf/RefCounted.h>
namespace WebCore {
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() { return m_current.get(); }
const Node& currentNode() const { return m_current.get(); }
WEBCORE_EXPORT void setCurrentNode(Node&);
WEBCORE_EXPORT ExceptionOr<Node*> parentNode();
WEBCORE_EXPORT ExceptionOr<Node*> firstChild();
WEBCORE_EXPORT ExceptionOr<Node*> lastChild();
WEBCORE_EXPORT ExceptionOr<Node*> previousSibling();
WEBCORE_EXPORT ExceptionOr<Node*> nextSibling();
WEBCORE_EXPORT ExceptionOr<Node*> previousNode();
WEBCORE_EXPORT ExceptionOr<Node*> nextNode();
private:
TreeWalker(Node&, unsigned long whatToShow, RefPtr<NodeFilter>&&);
enum class SiblingTraversalType { Previous, Next };
template<SiblingTraversalType> ExceptionOr<Node*> traverseSiblings();
Node* setCurrent(Ref<Node>&&);
Ref<Node> m_current;
};
} // namespace WebCore