| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHILD_NODE_LIST_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHILD_NODE_LIST_H_ |
| |
| #include "third_party/blink/renderer/core/dom/collection_index_cache.h" |
| #include "third_party/blink/renderer/core/dom/container_node.h" |
| #include "third_party/blink/renderer/core/dom/node_list.h" |
| |
| namespace blink { |
| |
| class ChildNodeList final : public NodeList { |
| public: |
| explicit ChildNodeList(ContainerNode& root_node); |
| ~ChildNodeList() override; |
| |
| // DOM API. |
| unsigned length() const override { |
| return collection_index_cache_.NodeCount(*this); |
| } |
| Node* item(unsigned index) const override; |
| |
| // Non-DOM API. |
| void ChildrenChanged(const ContainerNode::ChildrenChange&); |
| void InvalidateCache() { collection_index_cache_.Invalidate(); } |
| ContainerNode& OwnerNode() const { return *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& current_node, |
| unsigned& current_offset) const; |
| Node* TraverseBackwardToOffset(unsigned offset, |
| Node& current_node, |
| unsigned& current_offset) const; |
| |
| void Trace(Visitor*) const override; |
| |
| private: |
| bool IsChildNodeList() const override { return true; } |
| Node* VirtualOwnerNode() const override; |
| |
| Member<ContainerNode> parent_; |
| mutable CollectionIndexCache<ChildNodeList, Node> collection_index_cache_; |
| }; |
| |
| template <> |
| struct DowncastTraits<ChildNodeList> { |
| static bool AllowFrom(const NodeList& nodeList) { |
| return nodeList.IsChildNodeList(); |
| } |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_CHILD_NODE_LIST_H_ |