390 lines
11 KiB
JavaScript
390 lines
11 KiB
JavaScript
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dojo.provide("dojox.xml.DomParser");
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dojox.xml.DomParser=new (function(){
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/**********************************************************
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* The DomParser is a close-to (but not entirely)
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* conforming XML parser based on regular
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* expressions. It will take any XML fragment
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* and return a lightweight JS structure that is
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* similar to (but not exactly) the DOM specification.
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*
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* Getter and setter methods are NOT available; the goal
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* was to keep the resulting object model entirely JS-like.
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*
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* All node types but document fragments are supported;
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* all nodes support getElementsByTagName and
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* getElementsByTagNameNS (with short names byName and
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* byNameNS). The document node supports getElementById
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* (byId), and all nodes support a supplimental
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* childrenByName/childrenByNameNS method as well.
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*
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* The object model is intended to be a READONLY format;
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* mutation events are NOT supported, and though you
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* can change properties on a node-by-node basis, certain
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* operations are not supported (such as changing the ID
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* of an element).
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**********************************************************/
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// internal use only.
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var nodeTypes={ ELEMENT:1, ATTRIBUTE:2, TEXT:3, CDATA_SECTION:4, PROCESSING_INSTRUCTION:7, COMMENT:8, DOCUMENT:9 };
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// compile the regular expressions once.
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var reTags=/<([^>\/\s+]*)([^>]*)>([^<]*)/g;
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var reAttr=/([^=]*)=(("([^"]*)")|('([^']*)'))/g; // patch from tdedischew AT gmail, with additional grouping
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var reEntity=/<!ENTITY\s+([^"]*)\s+"([^"]*)">/g;
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var reCData=/<!\[CDATA\[([\u0001-\uFFFF]*?)\]\]>/g;
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var reComments=/<!--([\u0001-\uFFFF]*?)-->/g;
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var trim=/^\s+|\s+$/g;
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var normalize=/\s+/g;
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var egt=/\>/g;
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var elt=/\</g;
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var equot=/\"/g;
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var eapos=/\'/g;
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var eamp=/\&/g;
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var dNs="_def_";
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// create a root node.
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function _doc(){
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return new (function(){
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var all={};
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this.nodeType=nodeTypes.DOCUMENT;
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this.nodeName="#document";
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this.namespaces={};
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this._nsPaths={};
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this.childNodes=[];
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this.documentElement=null;
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// any element with an ID attribute will be added to the internal hashtable.
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this._add=function(obj){
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if(typeof(obj.id)!="undefined"){ all[obj.id]=obj; }
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};
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this._remove=function(id){
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if(all[id]){ delete all[id]; }
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};
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this.byId=this.getElementById=function(id){ return all[id]; };
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this.byName=this.getElementsByTagName=byName;
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this.byNameNS=this.getElementsByTagNameNS=byNameNS;
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this.childrenByName=childrenByName;
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this.childrenByNameNS=childrenByNameNS;
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})();
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}
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// functions attached to element nodes
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function byName(name){
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// return all descendants with name. Fully qualified (i.e. svg:svg)
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function __(node, name, arr){
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dojo.forEach(node.childNodes, function(c){
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if(c.nodeType==nodeTypes.ELEMENT){
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if(name=="*"){ arr.push(c); }
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else if(c.nodeName==name){ arr.push(c); }
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__(c, name, arr);
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}
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});
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}
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var a=[];
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__(this, name, a);
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return a;
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}
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function byNameNS(name, ns){
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// return all descendants with name by namespace. If no namespace passed, the default is used.
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function __(node, name, ns, arr){
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dojo.forEach(node.childNodes, function(c){
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if(c.nodeType==nodeTypes.ELEMENT){
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if(name=="*"&&c.ownerDocument._nsPaths[ns]==c.namespace){ arr.push(c); }
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else if(c.localName==name&&c.ownerDocument._nsPaths[ns]==c.namespace){ arr.push(c); }
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__(c, name, ns, arr);
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}
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});
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}
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if(!ns){ ns=dNs; }
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var a=[];
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__(this, name, ns, a);
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return a;
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}
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// Only child nodes with name.
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function childrenByName(name){
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var a=[];
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dojo.forEach(this.childNodes, function(c){
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if(c.nodeType==nodeTypes.ELEMENT){
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if(name=="*"){ a.push(c); }
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else if(c.nodeName==name){ a.push(c); }
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}
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});
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return a;
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}
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function childrenByNameNS(name, ns){
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var a=[];
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dojo.forEach(this.childNodes, function(c){
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if(c.nodeType==nodeTypes.ELEMENT){
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if(name=="*"&&c.ownerDocument._nsPaths[ns]==c.namespace){ a.push(c); }
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else if(c.localName==name&&c.ownerDocument._nsPaths[ns]==c.namespace){ a.push(c); }
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}
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});
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return a;
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}
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function _createTextNode(v){
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return {
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nodeType:nodeTypes.TEXT,
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nodeName:"#text",
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nodeValue:v.replace(normalize," ").replace(egt,">").replace(elt,"<").replace(eapos,"'").replace(equot,'"').replace(eamp,"&")
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};
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}
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// attribute functions
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function getAttr(name){
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for(var i=0; i<this.attributes.length; i++){
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if(this.attributes[i].nodeName==name){
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return this.attributes[i].nodeValue;
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}
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}
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return null;
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}
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function getAttrNS(name, ns){
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for(var i=0; i<this.attributes.length; i++){
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if(this.ownerDocument._nsPaths[ns]==this.attributes[i].namespace
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&&this.attributes[i].localName==name
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){
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return this.attributes[i].nodeValue;
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}
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}
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return null;
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}
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// note that you can only swap IDs using setAttribute, NOT with setAttributeNS.
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function setAttr(name, val){
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var old=null;
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for(var i=0; i<this.attributes.length; i++){
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if(this.attributes[i].nodeName==name){
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old=this.attributes[i].nodeValue;
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this.attributes[i].nodeValue=val;
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break;
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}
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}
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if(name=="id"){
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if(old!=null){ this.ownerDocument._remove(old); }
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this.ownerDocument._add(this);
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}
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}
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function setAttrNS(name, val, ns){
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for(var i=0; i<this.attributes.length; i++){
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if(this.ownerDocument._nsPaths[ns]==this.attributes[i].namespace
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&&this.attributes[i].localName==name
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){
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this.attributes[i].nodeValue=val;
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return;
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}
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}
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}
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// navigation
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function prev(){
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var p=this.parentNode;
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if(p){
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for(var i=0;i<p.childNodes.length;i++){
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if(p.childNodes[i]==this&&i>0){
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return p.childNodes[i-1];
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}
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}
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}
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return null;
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}
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function next(){
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var p=this.parentNode;
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if(p){
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for(var i=0;i<p.childNodes.length;i++){
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if(p.childNodes[i]==this&&(i+1)<p.childNodes.length){
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return p.childNodes[i+1];
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}
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}
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}
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return null;
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}
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// the main method.
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this.parse=function(/* String */str){
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var root=_doc();
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if(str==null){ return root; }
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if(str.length==0){ return root; }
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// preprocess custom entities
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if(str.indexOf("<!ENTITY")>0){
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var entity, eRe=[];
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if(reEntity.test(str)){
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reEntity.lastIndex=0;
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// match entities
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while((entity=reEntity.exec(str))!=null){
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eRe.push({
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entity:"&"+entity[1].replace(trim,"")+";",
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expression:entity[2]
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});
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}
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// replace instances in the document.
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for(var i=0; i<eRe.length; i++){
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str=str.replace(new RegExp(eRe[i].entity, "g"), eRe[i].expression);
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}
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}
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}
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// pre-parse for CData, and tokenize.
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var cdSections=[], cdata;
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while((cdata=reCData.exec(str))!=null){ cdSections.push(cdata[1]); }
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for(var i=0; i<cdSections.length; i++){ str=str.replace(cdSections[i], i); }
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// pre-parse for comments, and tokenize.
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var comments=[], comment;
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while((comment=reComments.exec(str))!=null){ comments.push(comment[1]); }
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for(i=0; i<comments.length; i++){ str=str.replace(comments[i], i); }
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// parse the document
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var res, obj=root;
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while((res=reTags.exec(str))!=null){
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// closing tags.
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if(res[2].charAt(0)=="/" && res[2].replace(trim, "").length>1){
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if(obj.parentNode){
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obj=obj.parentNode;
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}
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var text=(res[3]||"").replace(trim, "");
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if(text.length>0) {
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obj.childNodes.push(_createTextNode(text));
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}
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}
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// open tags.
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else if(res[1].length>0){
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// figure out the type of node.
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if(res[1].charAt(0)=="?"){
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// processing instruction
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var name=res[1].substr(1);
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var target=res[2].substr(0,res[2].length-2);
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obj.childNodes.push({
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nodeType:nodeTypes.PROCESSING_INSTRUCTION,
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nodeName:name,
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nodeValue:target
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});
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}
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else if(res[1].charAt(0)=="!"){
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// CDATA; skip over any declaration elements.
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if(res[1].indexOf("![CDATA[")==0){
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var val=parseInt(res[1].replace("![CDATA[","").replace("]]",""));
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obj.childNodes.push({
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nodeType:nodeTypes.CDATA_SECTION,
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nodeName:"#cdata-section",
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nodeValue:cdSections[val]
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});
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}
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// Comments.
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else if(res[1].substr(0,3)=="!--"){
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var val=parseInt(res[1].replace("!--","").replace("--",""));
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obj.childNodes.push({
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nodeType:nodeTypes.COMMENT,
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nodeName:"#comment",
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nodeValue:comments[val]
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});
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}
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}
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else {
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// Elements (with attribute and text)
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var name=res[1].replace(trim,"");
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var o={
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nodeType:nodeTypes.ELEMENT,
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nodeName:name,
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localName:name,
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namespace:dNs,
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ownerDocument:root,
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attributes:[],
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parentNode:null,
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childNodes:[]
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};
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// check to see if it's namespaced.
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if(name.indexOf(":")>-1){
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var t=name.split(":");
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o.namespace=t[0];
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o.localName=t[1];
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}
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// set the function references.
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o.byName=o.getElementsByTagName=byName;
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o.byNameNS=o.getElementsByTagNameNS=byNameNS;
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o.childrenByName=childrenByName;
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o.childrenByNameNS=childrenByNameNS;
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o.getAttribute=getAttr;
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o.getAttributeNS=getAttrNS;
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o.setAttribute=setAttr;
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o.setAttributeNS=setAttrNS;
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o.previous=o.previousSibling=prev;
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o.next=o.nextSibling=next;
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// parse the attribute string.
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var attr;
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while((attr=reAttr.exec(res[2]))!=null){
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if(attr.length>0){
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var name=attr[1].replace(trim,"");
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var val=(attr[4]||attr[6]||"").replace(normalize," ")
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.replace(egt,">")
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.replace(elt,"<")
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.replace(eapos,"'")
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.replace(equot,'"')
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.replace(eamp,"&");
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if(name.indexOf("xmlns")==0){
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if(name.indexOf(":")>0){
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var ns=name.split(":");
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root.namespaces[ns[1]]=val;
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root._nsPaths[val]=ns[1];
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} else {
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root.namespaces[dNs]=val;
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root._nsPaths[val]=dNs;
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}
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} else {
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var ln=name;
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var ns=dNs;
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if(name.indexOf(":")>0){
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var t=name.split(":");
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ln=t[1];
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ns=t[0];
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}
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o.attributes.push({
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nodeType:nodeTypes.ATTRIBUTE,
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nodeName:name,
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localName:ln,
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namespace:ns,
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nodeValue:val
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});
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// only add id as a property.
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if(ln=="id"){ o.id=val; }
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}
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}
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}
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root._add(o);
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if(obj){
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obj.childNodes.push(o);
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o.parentNode=obj;
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// if it's not a self-closing node.
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if(res[2].charAt(res[2].length-1)!="/"){
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obj=o;
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}
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}
|
||
|
|
var text=res[3];
|
||
|
|
if(text.length>0){
|
||
|
|
obj.childNodes.push(_createTextNode(text));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// set the document element
|
||
|
|
for(var i=0; i<root.childNodes.length; i++){
|
||
|
|
var e=root.childNodes[i];
|
||
|
|
if(e.nodeType==nodeTypes.ELEMENT){
|
||
|
|
root.documentElement=e;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return root;
|
||
|
|
};
|
||
|
|
})();
|