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00001 /* 00002 * Licensed to the Apache Software Foundation (ASF) under one or more 00003 * contributor license agreements. See the NOTICE file distributed with 00004 * this work for additional information regarding copyright ownership. 00005 * The ASF licenses this file to You under the Apache License, Version 2.0 00006 * (the "License"); you may not use this file except in compliance with 00007 * the License. You may obtain a copy of the License at 00008 * 00009 * http://www.apache.org/licenses/LICENSE-2.0 00010 * 00011 * Unless required by applicable law or agreed to in writing, software 00012 * distributed under the License is distributed on an "AS IS" BASIS, 00013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00014 * See the License for the specific language governing permissions and 00015 * limitations under the License. 00016 */ 00017 00018 /* 00019 * $Id: DOMChildNode.cpp 471747 2006-11-06 14:31:56Z amassari $ 00020 */ 00021 00022 // This class only adds the ability to have siblings 00023 00024 #include <xercesc/util/XercesDefs.hpp> 00025 #include "DOMNodeImpl.hpp" 00026 #include "DOMChildNode.hpp" 00027 #include "DOMCasts.hpp" 00028 00029 XERCES_CPP_NAMESPACE_BEGIN 00030 00031 00032 DOMChildNode::DOMChildNode() 00033 { 00034 this->previousSibling = 0; 00035 this->nextSibling = 0; 00036 } 00037 00038 // This only makes a shallow copy, cloneChildren must also be called for a 00039 // deep clone 00040 DOMChildNode::DOMChildNode(const DOMChildNode &) 00041 { 00042 // Need to break the association w/ original siblings and parent 00043 this->previousSibling = 0; 00044 this->nextSibling = 0; 00045 } 00046 00047 DOMChildNode::~DOMChildNode() { 00048 } 00049 00050 00051 DOMNode * DOMChildNode::getNextSibling() const { 00052 return nextSibling; 00053 } 00054 00055 // 00056 // Note: for getParentNode and getPreviousSibling(), below, an 00057 // extra paramter "thisNode" is required. This is because there 00058 // is no way to cast from a DOMChildNode pointer back to the 00059 // DOMNodeImpl that it is part of. Our "this" may or may not 00060 // be preceded by a fParent in the object layout, and there's no 00061 // practical way to tell, so we just take an extra parameter instead. 00062 00063 DOMNode * DOMChildNode::getParentNode(const DOMNode *thisNode) const 00064 { 00065 // if we have an owner, ownerNode is our parent, otherwise it's 00066 // our ownerDocument and we don't have a parent 00067 DOMNodeImpl *thisNodeImpl = castToNodeImpl(thisNode); 00068 return thisNodeImpl->isOwned() ? thisNodeImpl->fOwnerNode : 0; 00069 } 00070 00071 DOMNode * DOMChildNode::getPreviousSibling(const DOMNode *thisNode) const { 00072 // if we are the firstChild, previousSibling actually refers to our 00073 // parent's lastChild, but we hide that 00074 return castToNodeImpl(thisNode)->isFirstChild() ? 0 : previousSibling; 00075 } 00076 00077 XERCES_CPP_NAMESPACE_END 00078