69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
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* Copyright (C) 2001 Peter Kelly (pmk@post.com)
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* Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
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* Copyright (C) 2004-2019 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#pragma once
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#include "ExceptionOr.h"
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#include "NodeFilter.h"
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#include "ScriptWrappable.h"
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#include "Traversal.h"
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#include <wtf/IsoMalloc.h>
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#include <wtf/RefCounted.h>
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namespace WebCore {
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class TreeWalker final : public ScriptWrappable, public RefCounted<TreeWalker>, public NodeIteratorBase {
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WTF_MAKE_ISO_ALLOCATED_EXPORT(TreeWalker, WEBCORE_EXPORT);
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public:
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static Ref<TreeWalker> create(Node& rootNode, unsigned long whatToShow, RefPtr<NodeFilter>&& filter)
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{
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return adoptRef(*new TreeWalker(rootNode, whatToShow, WTFMove(filter)));
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}
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Node& currentNode() { return m_current.get(); }
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const Node& currentNode() const { return m_current.get(); }
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WEBCORE_EXPORT void setCurrentNode(Node&);
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WEBCORE_EXPORT ExceptionOr<Node*> parentNode();
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WEBCORE_EXPORT ExceptionOr<Node*> firstChild();
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WEBCORE_EXPORT ExceptionOr<Node*> lastChild();
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WEBCORE_EXPORT ExceptionOr<Node*> previousSibling();
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WEBCORE_EXPORT ExceptionOr<Node*> nextSibling();
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WEBCORE_EXPORT ExceptionOr<Node*> previousNode();
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WEBCORE_EXPORT ExceptionOr<Node*> nextNode();
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private:
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TreeWalker(Node&, unsigned long whatToShow, RefPtr<NodeFilter>&&);
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enum class SiblingTraversalType { Previous, Next };
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template<SiblingTraversalType> ExceptionOr<Node*> traverseSiblings();
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Node* setCurrent(Ref<Node>&&);
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Ref<Node> m_current;
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};
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} // namespace WebCore
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