RE: [xsl] escaping from CDATA

["Chris Bayes" <chris at bayes dot co dot uk>]

> Within XPath and XSLT, a node-set consisting of a single text 
> node can be used anywhere that a string is expected. But not 
> when you call JavaScript; your JavaScript function is 
> expecting a string, and it doesn't know what to do if you 
> give it a node-set instead.

But that can easily be fixed in all cases with something like this. 

    function Fun(ctx) {
		vat ipString = "";
		if (typeof(ctx) == "object"){
		   if (ctx.length){
			for (var i=0; i < 1; i++){
				ctxN  = ctx.item(i);
				if (ctxN.nodeType == 1)
					ipString +=  _wander(ctxN);
				if (ctxN.nodeType == 2)
					ipString += ctxN.nodeValue;
			}
		   }else{
			return '';
		   }
		}else{
			ipString = ctx;
		}
		var xml = new ActiveXObject("msxml2.domdocument");
		xml.loadXML(ipString);
		return xml.selectSingleNode("/");
   }
function   _wander(ctx){
	var retStr = "";
	for (var i=0; i < ctx.childNodes.length; i++){
		ctxN = ctx.childNodes[i];
		switch(ctxN.nodeType){
			case 1:
				retStr +=   _wander(ctxN);
				break;
			case 3:
				retStr += ctxN.nodeValue;
				break;
			default:
				break;
		}
	}
	return retStr;
}

Which says if the argument is type object then it is either an attribute
node so use that value or an element/nodelist so wander the subtree
getting the string value, else the argument is a string so use that.
The _wander function probably isn't needed in this case and you could
just use ipString += ctxN.nodeValue; but it allows situation like

<parts><![CDATA[<element>]]>
<part1>
<![CDATA[<element attr="100"><a>100</a><b>200</b></element>]]>
</part1>
<part2>
<![CDATA[<element attr="100"><a>100</a><b>200</b></element>]]>
</part2>
<![CDATA[</element>]]></parts>

If anyone is perverse enough to want to do that.
If you are limiting to one cdata then you could just do

function Fun(ctx) {
	var ipString = "";
	if (typeof(ctx) == "object"){
		if (ctx.length){
			ipString = ctxN.nodeValue;
		}else{
			return '';
		}
	}else{
		ipString = ctx;
	}
	var xml = new ActiveXObject("msxml2.domdocument");
	xml.loadXML(ipString);
	return xml.selectSingleNode("/");
}

That way you can pass any type and not have to worry about converting it
to a string first.

Ciao Chris

XML/XSL Portal
http://www.bayes.co.uk/xml


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