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/*
* 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, 2006, 2007 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.
*
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_LIVE_NODE_LIST_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_LIVE_NODE_LIST_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/live_node_list_base.h"
#include "third_party/blink/renderer/core/dom/node_list.h"
#include "third_party/blink/renderer/core/html/collection_items_cache.h"
#include "third_party/blink/renderer/core/html/collection_type.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class Element;
class CORE_EXPORT LiveNodeList : public NodeList, public LiveNodeListBase {
USING_GARBAGE_COLLECTED_MIXIN(LiveNodeList);
public:
LiveNodeList(ContainerNode& owner_node,
CollectionType collection_type,
NodeListInvalidationType invalidation_type,
NodeListSearchRoot search_root = NodeListSearchRoot::kOwnerNode)
: LiveNodeListBase(owner_node,
search_root,
invalidation_type,
collection_type) {
// Keep this in the child class because |registerNodeList| requires wrapper
// tracing and potentially calls virtual methods which is not allowed in a
// base class constructor.
GetDocument().RegisterNodeList(this);
}
unsigned length() const final;
Element* item(unsigned offset) const final;
virtual bool ElementMatches(const Element&) const = 0;
void InvalidateCache(Document* old_document = nullptr) const final;
void InvalidateCacheForAttribute(const QualifiedName*) const;
// Collection IndexCache API.
bool CanTraverseBackward() const { return true; }
Element* TraverseToFirst() const;
Element* TraverseToLast() const;
Element* TraverseForwardToOffset(unsigned offset,
Element& current_node,
unsigned& current_offset) const;
Element* TraverseBackwardToOffset(unsigned offset,
Element& current_node,
unsigned& current_offset) const;
void Trace(Visitor*) const override;
private:
Node* VirtualOwnerNode() const final;
mutable CollectionItemsCache<LiveNodeList, Element> collection_items_cache_;
};
template <>
struct DowncastTraits<LiveNodeList> {
static bool AllowFrom(const LiveNodeListBase& list) {
return IsLiveNodeListType(list.GetType());
}
};
inline void LiveNodeList::InvalidateCacheForAttribute(
const QualifiedName* attr_name) const {
if (!attr_name ||
ShouldInvalidateTypeOnAttributeChange(InvalidationType(), *attr_name))
InvalidateCache();
}
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_LIVE_NODE_LIST_H_
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