| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2001 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2007 Apple Inc. All rights reserved. |
| * Copyright (C) 2014 Samsung Electronics. 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 ChildNodeList_h |
| #define ChildNodeList_h |
| |
| #include "core/dom/ContainerNode.h" |
| #include "core/dom/NodeList.h" |
| #include "core/html/CollectionIndexCache.h" |
| #include "wtf/PassRefPtr.h" |
| |
| namespace blink { |
| |
| class ChildNodeList final : public NodeList { |
| public: |
| static PassRefPtrWillBeRawPtr<ChildNodeList> create(ContainerNode& rootNode) |
| { |
| return adoptRefWillBeNoop(new ChildNodeList(rootNode)); |
| } |
| |
| virtual ~ChildNodeList(); |
| |
| // DOM API. |
| virtual unsigned length() const override { return m_collectionIndexCache.nodeCount(*this); } |
| virtual Node* item(unsigned index) const override { return m_collectionIndexCache.nodeAt(*this, index); } |
| |
| // Non-DOM API. |
| void invalidateCache() { m_collectionIndexCache.invalidate(); } |
| ContainerNode& ownerNode() const { return *m_parent; } |
| |
| ContainerNode& rootNode() const { return ownerNode(); } |
| |
| // CollectionIndexCache API. |
| bool canTraverseBackward() const { return true; } |
| Node* traverseToFirst() const { return rootNode().firstChild(); } |
| Node* traverseToLast() const { return rootNode().lastChild(); } |
| Node* traverseForwardToOffset(unsigned offset, Node& currentNode, unsigned& currentOffset) const; |
| Node* traverseBackwardToOffset(unsigned offset, Node& currentNode, unsigned& currentOffset) const; |
| |
| virtual void trace(Visitor*) override; |
| |
| private: |
| explicit ChildNodeList(ContainerNode& rootNode); |
| |
| virtual bool isChildNodeList() const override { return true; } |
| virtual Node* virtualOwnerNode() const override; |
| |
| RefPtrWillBeMember<ContainerNode> m_parent; |
| mutable CollectionIndexCache<ChildNodeList, Node> m_collectionIndexCache; |
| }; |
| |
| DEFINE_TYPE_CASTS(ChildNodeList, NodeList, nodeList, nodeList->isChildNodeList(), nodeList.isChildNodeList()); |
| |
| } // namespace blink |
| |
| #endif // ChildNodeList_h |