/* * 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" namespace WebCore { class NodeIterator : public ScriptWrappable, public RefCounted<NodeIterator>, public NodeIteratorBase { public: static Ref<NodeIterator> create(Node&, unsigned whatToShow, RefPtr<NodeFilter>&&); WEBCORE_EXPORT ~NodeIterator(); WEBCORE_EXPORT ExceptionOr<RefPtr<Node>> nextNode(); WEBCORE_EXPORT ExceptionOr<RefPtr<Node>> previousNode(); void detach() { } // This is now a no-op as per the DOM specification. Node* referenceNode() const { return m_referenceNode.node.get(); } bool pointerBeforeReferenceNode() const { return m_referenceNode.isPointerBeforeNode; } // This function is called before any node is removed from the document tree. void nodeWillBeRemoved(Node&); private: NodeIterator(Node&, unsigned whatToShow, RefPtr<NodeFilter>&&); struct NodePointer { RefPtr<Node> node; bool isPointerBeforeNode { true }; NodePointer() = default; NodePointer(Node&, bool); void clear(); bool moveToNext(Node& root); bool moveToPrevious(Node& root); }; void updateForNodeRemoval(Node& nodeToBeRemoved, NodePointer&) const; NodePointer m_referenceNode; NodePointer m_candidateNode; }; } // namespace WebCore