yaya-template.js

/*
 * YayaTemplate - A fast javascript template engine
 * https://github.com/zinkey/YayaTemplate
 * @copyright yaya&jihu
 * 2012 MIT License
 */
;(function (name, factory, context) {  
    'use strict';
   
    if (typeof module != 'undefined' && module.exports) {  
        module.exports = factory();  
    } else if (typeof context["define"] === "function" && context["define"].amd) {  
        define(name,factory);  
    } else {  
        context[name] = factory();  
    }  
})("YayaTemplate",function(){
    'use strict';
    
    var _s,
        _sl,
        _sn,
        _sd,
        temp,
        array,
        len,
        identifierstr,
        value,
        valuemap,
        temnum,
        temarr,
        keyword,
        render;

    if (typeof document === "object"&&typeof navigator === "object")
    {
        _s = /msie (\d+\.\d+)/i.test(navigator.userAgent)?(document || + RegExp['$1'])>=8:true;
    }
    else{
        _s = true;
    }

    if (_s)
    {
        _sl = "+=";
        _sd = "''";
        _sn = "";
    }
    else{
        _sl = ".push";
        _sd = "[]";
        _sn = ".join('')";
    }

    function isKeyword(id) {
        keyword = false;
        switch (id.length) {
        case 2:
            keyword = (id === 'if') || (id === 'in') || (id === 'do');
            break;
        case 3:
            keyword = (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try') || (id === 'let');
            break;
        case 4:
            keyword = (id === 'this') || (id === 'else') || (id === 'case') || (id === 'void') || (id === 'with') ||(id === 'enum');
            break;
        case 5:
            keyword = (id === 'while') || (id === 'break') || (id === 'catch') || (id === 'throw') || (id === 'const') || (id === 'yield') || (id === 'class') || (id === 'export') || (id === 'import') || (id === 'super');
            break;
        case 6:
            keyword = (id === 'return') || (id === 'typeof') || (id === 'delete') || (id === 'switch') || (id === 'public') || (id === 'static');
            break;
        case 7:
            keyword = (id === 'default') || (id === 'finally') || (id === 'package') || (id === 'private') || (id === 'extends');
            break;
        case 8:
            keyword = (id === 'function') || (id === 'continue') || (id === 'debugger');
            break;
        case 9:
            keyword = (id === 'interface') || (id === 'protected');
            break;
        case 10:
            keyword = (id === 'instanceof') || (id === 'implements');
            break;
        }
        return keyword;
    }
    
    function analyze(text){
        temnum=-1;
        temarr=[];
        temp =  text.replace(/{\%([\s\S]*?)\%}/g,function(a,b){
            temarr[++temnum] = '");_YayaTemplateString'+_sl+'('+b+');_YayaTemplateString'+_sl+'("';
            return "YayaTemplateFLAG"+temnum
        }).replace(/{\$([\s\S]*?)\$}/g,function(a,b){
            return '_YayaTemplateString'+_sl+'("'+b.replace(/("|\\|\r|\n)/g,"\\$1")+'");';
        }).replace(/YayaTemplateFLAG(\d+)/g,function(a,b){
            return temarr[b];
        });
        array = temp.replace(/"([^\\"]|\\[\s\S])*"|'([^\\']|\\[\s\S])*'/g,"").replace(/\.[\_\$\w]+/g,"").match(/[\_\$a-zA-Z]+[0-9]*/g);
        len = array.length;
        valuemap = {};
        identifierstr = '';
        while(len--)
        {
            value = array[len];
            if (!valuemap[value]&&!isKeyword(value))
            {
                identifierstr+=value+'=_YayaTemplateObject["'+value+'"],';
                valuemap[value] = true;
            }
        }
        return "var "+identifierstr+"_YayaTemplateString="+_sd+";"+temp+" return _YayaTemplateString"+_sn+";";
    }

    return function(str){
        return {
            render:new Function("_YayaTemplateObject",analyze(str))
        };
    };

},this);