2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 1999 Antti Koivisto (koivisto@kde.org)
4 * (C) 2001 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2004, 2007 Apple Inc. All rights reserved.
6 * Copyright (C) 2014 Samsung Electronics. All rights reserved.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 #ifndef ChildNodeList_h
26 #define ChildNodeList_h
28 #include "core/dom/NodeList.h"
29 #include "core/html/CollectionIndexCache.h"
30 #include "wtf/PassRefPtr.h"
34 class ChildNodeList FINAL : public NodeList {
36 static PassRefPtr<ChildNodeList> create(ContainerNode& rootNode)
38 return adoptRef(new ChildNodeList(rootNode));
41 virtual ~ChildNodeList();
44 virtual unsigned length() const OVERRIDE { return m_collectionIndexCache.nodeCount(*this); }
45 virtual Node* item(unsigned index) const OVERRIDE { return m_collectionIndexCache.nodeAt(*this, index); }
48 void invalidateCache() { m_collectionIndexCache.invalidate(); }
49 ContainerNode& ownerNode() const { return *m_parent; }
51 ContainerNode& rootNode() const { return ownerNode(); }
53 // CollectionIndexCache API.
54 bool canTraverseBackward() const { return true; }
55 Node* traverseToFirstElement() const { return rootNode().firstChild(); }
56 Node* traverseToLastElement() const { return rootNode().lastChild(); }
57 Node* traverseForwardToOffset(unsigned offset, Node& currentNode, unsigned& currentOffset) const;
58 Node* traverseBackwardToOffset(unsigned offset, Node& currentNode, unsigned& currentOffset) const;
61 explicit ChildNodeList(ContainerNode& rootNode);
63 virtual bool isChildNodeList() const OVERRIDE { return true; }
64 virtual Node* virtualOwnerNode() const OVERRIDE;
66 RefPtr<ContainerNode> m_parent;
67 mutable CollectionIndexCache<ChildNodeList, Node> m_collectionIndexCache;
70 DEFINE_TYPE_CASTS(ChildNodeList, NodeList, nodeList, nodeList->isChildNodeList(), nodeList.isChildNodeList());
72 } // namespace WebCore
74 #endif // ChildNodeList_h