156 lines
6.4 KiB
JavaScript
156 lines
6.4 KiB
JavaScript
/* This work is licensed under Creative Commons GNU LGPL License.
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License: http://creativecommons.org/licenses/LGPL/2.1/
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Version: 0.9
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Author: Stefan Goessner/2006
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Web: http://goessner.net/
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*/
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function xml2json(xml, tab) {
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var X = {
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toObj: function(xml) {
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var o = {};
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if (xml.nodeType==1) { // element node ..
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if (xml.attributes.length) // element with attributes ..
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for (var i=0; i<xml.attributes.length; i++)
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o["@"+xml.attributes[i].nodeName] = (xml.attributes[i].nodeValue||"").toString();
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if (xml.firstChild) { // element has child nodes ..
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var textChild=0, cdataChild=0, hasElementChild=false;
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for (var n=xml.firstChild; n; n=n.nextSibling) {
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if (n.nodeType==1) hasElementChild = true;
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else if (n.nodeType==3 && n.nodeValue.match(/[^ \f\n\r\t\v]/)) textChild++; // non-whitespace text
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else if (n.nodeType==4) cdataChild++; // cdata section node
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}
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if (hasElementChild) {
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if (textChild < 2 && cdataChild < 2) { // structured element with evtl. a single text or/and cdata node ..
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X.removeWhite(xml);
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for (var n=xml.firstChild; n; n=n.nextSibling) {
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if (n.nodeType == 3) // text node
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o["#text"] = X.escape(n.nodeValue);
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else if (n.nodeType == 4) // cdata node
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o["#cdata"] = X.escape(n.nodeValue);
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else if (o[n.nodeName]) { // multiple occurence of element ..
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if (o[n.nodeName] instanceof Array)
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o[n.nodeName][o[n.nodeName].length] = X.toObj(n);
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else
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o[n.nodeName] = [o[n.nodeName], X.toObj(n)];
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}
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else // first occurence of element..
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o[n.nodeName] = X.toObj(n);
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}
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}
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else { // mixed content
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if (!xml.attributes.length)
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o = X.escape(X.innerXml(xml));
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else
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o["#text"] = X.escape(X.innerXml(xml));
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}
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}
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else if (textChild) { // pure text
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if (!xml.attributes.length)
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o = X.escape(X.innerXml(xml));
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else
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o["#text"] = X.escape(X.innerXml(xml));
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}
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else if (cdataChild) { // cdata
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if (cdataChild > 1)
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o = X.escape(X.innerXml(xml));
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else
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for (var n=xml.firstChild; n; n=n.nextSibling)
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o["#cdata"] = X.escape(n.nodeValue);
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}
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}
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if (!xml.attributes.length && !xml.firstChild) o = null;
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}
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else if (xml.nodeType==9) { // document.node
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o = X.toObj(xml.documentElement);
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}
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else
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alert("unhandled node type: " + xml.nodeType);
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return o;
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},
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toJson: function(o, name, ind) {
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var json = name ? ("\""+name+"\"") : "";
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if (o instanceof Array) {
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for (var i=0,n=o.length; i<n; i++)
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o[i] = X.toJson(o[i], "", ind+"\t");
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json += (name?":[":"[") + (o.length > 1 ? ("\n"+ind+"\t"+o.join(",\n"+ind+"\t")+"\n"+ind) : o.join("")) + "]";
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}
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else if (o == null)
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json += (name&&":") + "null";
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else if (typeof(o) == "object") {
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var arr = [];
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for (var m in o)
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arr[arr.length] = X.toJson(o[m], m, ind+"\t");
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json += (name?":{":"{") + (arr.length > 1 ? ("\n"+ind+"\t"+arr.join(",\n"+ind+"\t")+"\n"+ind) : arr.join("")) + "}";
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}
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else if (typeof(o) == "string")
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json += (name&&":") + "\"" + o.toString() + "\"";
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else
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json += (name&&":") + o.toString();
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return json;
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},
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innerXml: function(node) {
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var s = ""
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if ("innerHTML" in node)
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s = node.innerHTML;
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else {
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var asXml = function(n) {
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var s = "";
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if (n.nodeType == 1) {
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s += "<" + n.nodeName;
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for (var i=0; i<n.attributes.length;i++)
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s += " " + n.attributes[i].nodeName + "=\"" + (n.attributes[i].nodeValue||"").toString() + "\"";
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if (n.firstChild) {
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s += ">";
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for (var c=n.firstChild; c; c=c.nextSibling)
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s += asXml(c);
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s += "</"+n.nodeName+">";
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}
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else
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s += "/>";
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}
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else if (n.nodeType == 3)
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s += n.nodeValue;
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else if (n.nodeType == 4)
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s += "<![CDATA[" + n.nodeValue + "]]>";
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return s;
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};
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for (var c=node.firstChild; c; c=c.nextSibling)
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s += asXml(c);
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}
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return s;
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},
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escape: function(txt) {
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return txt.replace(/[\\]/g, "\\\\")
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.replace(/[\"]/g, '\\"')
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.replace(/[\n]/g, '\\n')
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.replace(/[\r]/g, '\\r');
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},
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removeWhite: function(e) {
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e.normalize();
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for (var n = e.firstChild; n; ) {
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if (n.nodeType == 3) { // text node
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if (!n.nodeValue.match(/[^ \f\n\r\t\v]/)) { // pure whitespace text node
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var nxt = n.nextSibling;
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e.removeChild(n);
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n = nxt;
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}
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else
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n = n.nextSibling;
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}
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else if (n.nodeType == 1) { // element node
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X.removeWhite(n);
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n = n.nextSibling;
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}
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else // any other node
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n = n.nextSibling;
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}
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return e;
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}
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};
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if (xml.nodeType == 9) // document node
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xml = xml.documentElement;
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var json = X.toJson(X.toObj(X.removeWhite(xml)), xml.nodeName, "\t");
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return "{\n" + tab + (tab ? json.replace(/\t/g, tab) : json.replace(/\t|\n/g, "")) + "\n}";
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}
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