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, 2008, 2010 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 #include "config.h" 24 #include "core/dom/LiveNodeList.h" 25 26 #include "core/dom/Document.h" 27 #include "core/dom/Element.h" 28 #include "core/html/HTMLCollection.h" 29 30 namespace WebCore { 31 32 Node* LiveNodeListBase::rootNode() const 33 { 34 if (isRootedAtDocument() && m_ownerNode->inDocument()) 35 return m_ownerNode->document(); 36 return m_ownerNode.get(); 37 } 38 39 ContainerNode* LiveNodeListBase::rootContainerNode() const 40 { 41 Node* rootNode = this->rootNode(); 42 if (!rootNode->isContainerNode()) 43 return 0; 44 return toContainerNode(rootNode); 45 } 46 47 void LiveNodeListBase::invalidateCache() const 48 { 49 m_cachedItem = 0; 50 m_isLengthCacheValid = false; 51 m_isItemCacheValid = false; 52 m_isNameCacheValid = false; 53 m_isItemRefElementsCacheValid = false; 54 if (isNodeList(type())) 55 return; 56 57 const HTMLCollection* cacheBase = static_cast<const HTMLCollection*>(this); 58 cacheBase->m_idCache.clear(); 59 cacheBase->m_nameCache.clear(); 60 cacheBase->m_cachedElementsArrayOffset = 0; 61 } 62 63 void LiveNodeListBase::invalidateIdNameCacheMaps() const 64 { 65 ASSERT(hasIdNameCache()); 66 const HTMLCollection* cacheBase = static_cast<const HTMLCollection*>(this); 67 cacheBase->m_idCache.clear(); 68 cacheBase->m_nameCache.clear(); 69 } 70 71 Node* LiveNodeList::namedItem(const AtomicString& elementId) const 72 { 73 Node* rootNode = this->rootNode(); 74 75 if (rootNode->inDocument()) { 76 Element* element = rootNode->treeScope()->getElementById(elementId); 77 if (element && nodeMatches(element) && element->isDescendantOf(rootNode)) 78 return element; 79 if (!element) 80 return 0; 81 // In the case of multiple nodes with the same name, just fall through. 82 } 83 84 unsigned length = this->length(); 85 for (unsigned i = 0; i < length; i++) { 86 Node* node = item(i); 87 // FIXME: This should probably be using getIdAttribute instead of idForStyleResolution. 88 if (node->hasID() && toElement(node)->idForStyleResolution() == elementId) 89 return node; 90 } 91 92 return 0; 93 } 94 95 } // namespace WebCore 96