unoxml/source/dom/elementlist.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: elementlist.cxx,v $
  10  * $Revision: 1.7 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 #include "elementlist.hxx"
  32
  33 #include <string.h>
  34
  35 namespace DOM
  36 {
  37
  38     CElementList::CElementList(const CElement* aElement, const OUString& aName)
  39         : m_pElement(aElement)
  40         , m_aName(aName)
  41         , xURI(0)
  42         , m_bRebuild(sal_True)
  43     {
  44         OString o1 = OUStringToOString(aName, RTL_TEXTENCODING_UTF8);
  45         xName = new xmlChar[o1.getLength()];
  46         strcpy((char*)xName, o1.getStr());
  47         registerListener(aElement);
  48     }
  49
  50     CElementList::CElementList(const CElement* aElement, const OUString& aName, const OUString& aURI)
  51         : m_pElement(aElement)
  52         , m_aName(aName)
  53         , m_aURI(aURI)
  54         , m_bRebuild(sal_True)
  55     {
  56         OString o1 = OUStringToOString(aName, RTL_TEXTENCODING_UTF8);
  57         xName = new xmlChar[o1.getLength()];
  58         strcpy((char*)xName, o1.getStr());
  59         OString o2 = OUStringToOString(aURI, RTL_TEXTENCODING_UTF8);
  60         xURI = new xmlChar[o2.getLength()];
  61         strcpy((char*)xURI, o2.getStr());
  62         registerListener(aElement);
  63     }
  64
  65     void CElementList::registerListener(const CElement* pElement)
  66     {
  67         try {
  68             // get the XNode
  69             Reference< XNode > xNode(CNode::get(static_cast<const CNode*>(pElement)->m_aNodePtr));
  70             Reference< XEventTarget > xTarget(xNode, UNO_QUERY_THROW);
  71             OUString aType = OUString::createFromAscii("DOMSubtreeModified");
  72             sal_Bool capture = sal_False;
  73             xTarget->addEventListener(aType, Reference< XEventListener >(this), capture);
  74         } catch (Exception &e){
  75             OString aMsg("Exception caught while registering NodeList as listener:\n");
  76             aMsg += OUStringToOString(e.Message, RTL_TEXTENCODING_ASCII_US);
  77             OSL_ENSURE(sal_False, aMsg.getStr());
  78         }
  79     }
  80
  81     void CElementList::buildlist(xmlNodePtr pNode, sal_Bool start)
  82     {
  83         // bail out if no rebuild is needed
  84         if (start) {
  85             if (!m_bRebuild)
  86             {
  87                 return;
  88             } else {
  89                 m_nodevector.erase(m_nodevector.begin(), m_nodevector.end());
  90                 m_bRebuild = sal_False; // don't rebuild until tree is mutated
  91             }
  92         }
  93
  94         while (pNode != NULL )
  95         {
  96             if (pNode->type == XML_ELEMENT_NODE && strcmp((char*)pNode->name, (char*)xName)==0)
  97             {
  98                 if (xURI == NULL)
  99                     m_nodevector.push_back(pNode);
 100                 else
 101                     if (pNode->ns != NULL && strcmp((char*)pNode->ns->href, (char*)xURI) == 0)
 102                         m_nodevector.push_back(pNode);
 103             }
 104             if (pNode->children != NULL) buildlist(pNode->children, sal_False);
 105
 106             if (!start) pNode = pNode->next;
 107             else break; // fold back
 108         }
 109     }
 110
 111     /**
 112     The number of nodes in the list.
 113     */
 114     sal_Int32 SAL_CALL CElementList::getLength() throw (RuntimeException)
 115     {
 116         // this has to be 'live'
 117         buildlist(static_cast<const CNode*>(m_pElement)->m_aNodePtr);
 118         return m_nodevector.size();
 119     }
 120     /**
 121     Returns the indexth item in the collection.
 122     */
 123     Reference< XNode > SAL_CALL CElementList::item(sal_Int32 index) throw (RuntimeException)
 124     {
 125         if (index < 0) throw RuntimeException();
 126         buildlist(static_cast<const CNode*>(m_pElement)->m_aNodePtr);
 127         return Reference< XNode >(CNode::get(m_nodevector[index]));
 128     }
 129
 130     // tree mutations can change the list
 131     void SAL_CALL CElementList::handleEvent(const Reference< XEvent >& evt) throw (RuntimeException)
 132     {
 133       Reference< XEvent > aEvent = evt;
 134         m_bRebuild = sal_True;
 135     }
 136 }