1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2001 Dirk Mueller (mueller (at) kde.org) 5 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24 #ifndef LiveNodeList_h 25 #define LiveNodeList_h 26 27 #include "core/dom/LiveNodeListBase.h" 28 #include "core/dom/NodeList.h" 29 #include "core/html/CollectionItemsCache.h" 30 #include "core/html/CollectionType.h" 31 #include "platform/heap/Handle.h" 32 #include "wtf/PassRefPtr.h" 33 34 namespace blink { 35 36 class Element; 37 38 class LiveNodeList : public NodeList, public LiveNodeListBase { 39 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(LiveNodeList); 40 public: 41 LiveNodeList(ContainerNode& ownerNode, CollectionType collectionType, NodeListInvalidationType invalidationType, NodeListRootType rootType = NodeListIsRootedAtNode) 42 : LiveNodeListBase(ownerNode, rootType, invalidationType, collectionType) { } 43 44 virtual unsigned length() const OVERRIDE FINAL; 45 virtual Element* item(unsigned offset) const OVERRIDE FINAL; 46 virtual bool elementMatches(const Element&) const = 0; 47 48 virtual void invalidateCache(Document* oldDocument = 0) const OVERRIDE FINAL; 49 void invalidateCacheForAttribute(const QualifiedName*) const; 50 51 // Collection IndexCache API. 52 bool canTraverseBackward() const { return true; } 53 Element* traverseToFirst() const; 54 Element* traverseToLast() const; 55 Element* traverseForwardToOffset(unsigned offset, Element& currentNode, unsigned& currentOffset) const; 56 Element* traverseBackwardToOffset(unsigned offset, Element& currentNode, unsigned& currentOffset) const; 57 58 virtual void trace(Visitor*) OVERRIDE; 59 60 private: 61 virtual Node* virtualOwnerNode() const OVERRIDE FINAL; 62 63 mutable CollectionItemsCache<LiveNodeList, Element> m_collectionItemsCache; 64 }; 65 66 DEFINE_TYPE_CASTS(LiveNodeList, LiveNodeListBase, list, isLiveNodeListType(list->type()), isLiveNodeListType(list.type())); 67 68 inline void LiveNodeList::invalidateCacheForAttribute(const QualifiedName* attrName) const 69 { 70 if (!attrName || shouldInvalidateTypeOnAttributeChange(invalidationType(), *attrName)) 71 invalidateCache(); 72 } 73 74 } // namespace blink 75 76 #endif // LiveNodeList_h 77
