*************************************************** XWeb XParser 0.8

  Browsers Supported
  MSIE 6
  Mozilla 1+
  Firefox 0.8+
  
  Online documentation at http://www.wdonline.com/javascript/xparser/
  (c) 2004  Jeremy McPeak  jwmcpeak@gmail.com
  *****************************************************/
  function XParser(sFileName,bIsXml) {
      var oThis = this;
      this.title=this.link=this.description=this.copyright=this.generator=this.modified=this.author=new XParserElement();
      this.onload = null;
      if (bIsXml) this.load(sFileName);
      else {
                  var oReq = zXmlHttp.createRequest();
                  oReq.onreadystatechange = function () {
                          if (oReq.readyState == 4) {
                      // only if "OK"
                                  if (oReq.status == 200) {
                          oThis.load(oReq.responseText);
                                  }
                          }
                  };
                  oReq.open("GET", sFileName, true);
                  oReq.send(null);
      }
  }
  
  XParser.prototype.load = function (sXml) {
          var oXmlDom = zXmlDom.createDocument();
          oXmlDom.loadXML(sXml);
          
          this.root = oXmlDom.documentElement;
          this.isRss = (this.root.tagName.toLowerCase() == "rss");
          if (this.isRss && parseInt(this.root.getAttribute("version")) < 2) 
                  throw new Error("RSS Version is less than 2");;
          this.isAtom = (this.root.tagName.toLowerCase() == "feed");
          this.type = (this.isRss)?"RSS":"Atom";
          var oChannel = (this.isRss)?this.root.getElementsByTagName("channel")[0]:this.root;
          
          for (var i = 0; i < oChannel.childNodes.length; i++) {
                  var oNode = oChannel.childNodes[i];
                  if (oNode.nodeType == 1) {
                          switch (oNode.tagName.toLowerCase()) {
                                  //Shared Tags
                                  case "title":
                                          this.title = new XParserElement(oNode);
                                  break;
                                  case "link":
                                          if (this.isAtom) {
                                                  if (oNode.getAttribute("rel").toLowerCase() == "alternate") {
                                                          this.link = new XParserElement(oNode,oNode.getAttribute("href"));
                                                  }
                                          } else {
                                                  this.link = new XParserElement(oNode);
                                          }
                                  break;
                                  case "copyright":
                                          this.copyright = new XParserElement(oNode);
                                  break;
                                  case "generator":
                                          this.generator = new XParserElement(oNode);
                                  break;
                                  //RSS Tags
                                  case "description":
                                          this.description = new XParserElement(oNode);
                                  break;
                                  case "lastbuilddate":
                                          this.modified = new XParserElement(oNode);
                                  break;
                                  case "managingeditor":
                                          this.author = new XParserElement(oNode);
                                  break;
                                  //Atom Tags
                                  case "tagline":
                                          this.description = new XParserElement(oNode);
                                  break;
                                  case "modified":
                                          this.modified = new XParserElement(oNode);
                                  break;
                                  case "author":
                                          this.author = new XParserElement(oNode);
                                  break;
                                  default:
                                  break;
                          }
                  }
          }
          this.items = [];
          
          var oItems = null;
          if (this.isRss) {
                  oItems = oChannel.getElementsByTagName("item");
          } else {
                  try {
                          oXmlDom.setProperty("SelectionNamespaces","xmlns:atom='http://www.w3.org/2005/Atom'");
                          oItems = oXmlDom.selectNodes("/atom:feed/atom:entry");
                  } catch (oError) {
                          oItems = oChannel.getElementsByTagName("entry");
                  }
          }
  
          for (var i = 0; i < oItems.length; i++) {
                  this.items[i] = new XParserItem(oItems[i]);
          }
          
          if (typeof this.onload == "function")
                  this.onload();
  }
  
  function XParserElement(oNode,sValue) {
          this.node = oNode || false;
          this.value = sValue || (this.node && this.node.text) || false;
          
          if (this.node) {
                  this.attributes = [];
                  var oAtts = this.node.attributes;
                  for (var i = 0; i < oAtts.length; i++) {
                          this.attributes[i] = new XParserAttribute(oAtts[i]);
                          this.attributes[oAtts[i].nodeName] = new XParserAttribute(oAtts[i]);
                  }
          } else this.attributes = 0;
          
          this.isNull = (!this.node && !this.value && !this.attributes);
  }
  
  function XParserAttribute(oNode) {
          this.value = oNode.nodeValue;
  }
  
  function XParserItem(itemNode) {
          this.title=this.link=this.author=this.description=this.date=new XParserElement();
          for (var i = 0; i < itemNode.childNodes.length; i++) {
                  var oNode = itemNode.childNodes[i];
                  if (oNode.nodeType == 1) {
                          switch (oNode.tagName.toLowerCase()) {
                                  //Shared Tags
                                  case "title":
                                          this.title = new XParserElement(oNode);
                                  break;
                                  case "link":
                                          if (oNode.getAttribute("href"))
                                                  this.link = new XParserElement(oNode,oNode.getAttribute("href"));
                                          else this.link = new XParserElement(oNode);
                                  break;
                                  case "author":
                                          this.author = new XParserElement(oNode);
                                  break;
                                  //RSS Tags
                                  case "description":
                                          this.description = new XParserElement(oNode);
                                  break;
                                  case "pubdate":
                                          this.date = new XParserElement(oNode);
                                  break;
                                  //Atom Tags
                                  case "content":
                                          this.description = new XParserElement(oNode);
                                  break;
                                  case "issued":
                                          this.date = new XParserElement(oNode);
                                  break;
                                  //Extensions
                                  case "dc:date":
                                          this.date = new XParserElement(oNode);
                                  break;
                                  default:
                                  break;
                          }
                  }
          }
  }
  
  /*
    Text Getter
    Written by Erik, http://webfx.eae.net
  */
  if (navigator.product == "Gecko") 
  {
          Text.prototype.__defineGetter__( "text", function ()
          {
             return this.nodeValue;
          } );
          
          Node.prototype.__defineGetter__( "text", function ()
          {
             var colNodes = this.childNodes;
             var iLen = colNodes.length;
             var arrText = new Array(iLen);
             for ( var i = 0; i < iLen; i++ )
                arrText[i] = colNodes[i].text;
             return arrText.join("");
          } );
  
  }

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[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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(C) Æliens 20/2/2008

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