[原创]GT-Template, 一个超轻量级的js模板工具

示例:

字符串 inTmp :   Hello,#{ VAR.custName /},My name is #{ VAR.myName /}.

var templateC= GT.compileTemplate(inTmp);

var inArg= {
	custName 'Tom',
	myName: 'fins'
}

var outResult = GT.runTemplate(templateC,inArg);

字符串 outResult :  Hello,Tom,My name is fins.

在#{ .../} 也可以写如相对 复杂的 js脚本, 例如  #{ VAR.gender==1?'男':'女'  /}
如果再复杂些建议写成 function,然后在 #{ /}内部调用 (可以写成内联的function 也可以用调用时传参的).

if (!GT){
	GT={};
}
// template为 一个字符串, 返回的是编译好的一个字符串数组,该数组为 runTemplate:方法的输入参数之一.
GT.compileTemplate= function(template){
			var TEMPLATE_START="#{";
			var TEMPLATE_END="/}";
			var templateC=[];
			var snippets=[];
			var current=0;
			while(true){
				var start= template.indexOf( TEMPLATE_START ,current);
				var sBegin=start+2;
				var sEnd=template.indexOf( TEMPLATE_END ,sBegin);

				if (sBegin>=2 && sEnd>sBegin){
					templateC.push(template.substring(current,start) );
					var sn=template.substring(sBegin,sEnd);
					if (sn.indexOf("#")==0){
						sn=eval( sn.substring(1) );
					}else{
						snippets.push(templateC.length);
					}
					templateC.push( sn );
				}else{
					templateC.push( template.substring(current) );
					break;
				}
				current=sEnd+2;
			}
			templateC.push(snippets);
			return templateC;
	};

// templateC为编译好的字符串数组, invar为模板中要传入的变量.
// 如果要传入多个变量, 请使用 {},或[] .
GT.runTemplate= function(templateC,invar){
		var VAR=invar;

		var snippets=templateC[templateC.length-1];

		var rs=[];
		var sIdx=0;

		for (var i=0;i<templateC.length-1;i++ ){
			if (snippets[sIdx]==i){
				rs.push(  eval(templateC[i]) );
				sIdx++;
			}else {
				rs.push( templateC[i] )
			}
		}

		return rs.join("");

	};

the "macro" can be placed anywhere in the template.

ex:

{for vo in tdata}
${testMacro(vo)}
{/for}


{macro testMacro(v)}
....
{/macro}




change log:



build 20060817:

1 a new better parse() Method.  shorter ,faster , clearer. 

2 add a Debuger interface method. it can help developer to debug.

3 fix a bug in emitSectionText() Method ;



build 20060813:

1 add some statement.  (for  foreach  while  switch  inline ....)

2 add some modifier    (transform  times ...)

3 change block function  (  cdata  eval minify ) extract them  from parse Method.

4 change the statement-RegularExpressions and blockFunction-RegularExpressions .
	now they are built automatically.

5 add TrimPath.tagMaxLength . 
 in ver1.0.38 ,the maximum statement tag length is 10 and 10 is a hardcode.

6  extract them:	
	var self_OUT=" var _OUT_arr = []; var _OUT = { write: function(m) { if (m) _OUT_arr.push(m); } }; ";
	var self_OUTResultArr = "_OUT_arr.join('')" ;

7 add a helper function  TrimPath.replaceAll();
	the replace method in javascript is  cann't replace all match substring except use RegularExpressions.
	the TrimPath.replaceAll(str,oldsubstring,newsubstring) don't use RegularExpressions.
 
8  add TrimPath.parseXMLTemplate.
	now you can save the template in the CDATA node of any XML File.


9 etc.

....