echajoa/common/daumeditor/js/lib/template.js

/**
 * Template - Very Very Simple Template Engine
 *  similar prototype.js template engine
 *  add syntax > #{for:name:maxCount:cutCount} template #{/for:name}
 *  add syntax > #{if:name sign value} template #{/if:name}
 */
(function(){
	
	function evaluate(data, tpl) {
		if (!data) {
			return '';
		}
		if (tpl.indexOf("\{if:") > -1) {
			tpl = tpl.replace(/#\{if:([_\w]+)([=><!]+)([_'"\-\w]+)\}([\s\S]*?)#\{\/if:\1\}/gm, function(full, start, sign, value, condtpl){
				if (data[start] == _NULL) {
					return full;
				}
				var _condition = _FALSE;
				try {
					sign = ((sign=="=")? "==": sign);
					var _left = "\"" + (data[start] + "").replace(/['"]/g, "") + "\"";
					var _right = "\"" + value.replace(/['"]/g, "") + "\"";
					_condition = txEval("(" + _left + sign + _right + ")");
				}catch(e) { _condition = _FALSE; }
				if(_condition) {
					return evaluate(data, condtpl);
				} else {
					return "";
				}
			});
		}
		if (tpl.indexOf("\{for:") > -1) {
			tpl = tpl.replace(/#\{for:([_\w]+):?(\d*):?(\d*)\}([\s\S]*?)#\{\/for:\1\}/gm, function(full, start, maxCnt, cutCnt, looptpl) {
				if (!data[start] || !data[start].length) {
					return full;
				}
				var _list = data[start];
				var _listTpl = [];
				maxCnt = !!maxCnt? (isNaN(maxCnt)? _list.length: parseInt(maxCnt)): _list.length;
				cutCnt = !!cutCnt? (isNaN(cutCnt)? 0: parseInt(cutCnt)): 0;
				for (var i = 0, len = Math.min(_list.length, maxCnt); i < len; i++) {
					_listTpl.push(evaluate(_list[i], looptpl));
				}
				return _listTpl.join("").substring(cutCnt);
			});
		}
		return tpl.replace(/#\{([_\w]+)\}/g, function(full, name) {
			if(data[name] != _NULL) {
				return data[name];
			} else {
				return full;
			}
		});
	}
	
	var tmp = _WIN.Template = function(template) {
		this.template = template;
	};
	
	tmp.prototype = {
		evaluate : function(data) {
			return evaluate(data, this.template);
		},
		evaluateToDom : function(data, element) {
			if(typeof(element) === 'string') {
				element = _DOC.getElementById(element);
			}
			element.innerHTML = evaluate(data, this.template);
		},
		evaluateAsDom : function(data, context) {
			var _tmpNode = (context || document).createElement('div');
			_tmpNode.innerHTML = evaluate(data, this.template);
			return _tmpNode.firstChild;
		}
	};
	/*
	Template.prototype.evaluate = function(data) {
		return evaluate(data, this.template);
	};
	
	Template.prototype.evaluateToDom = function(data, element) {
		if(typeof(element) === 'string') {
			element = _DOC.getElementById(element);
		}
		element.innerHTML = evaluate(data, this.template);
	};
	
	Template.prototype.evaluateAsDom = function(data, context) {
		var _tmpNode = (context || document).createElement('div');
		_tmpNode.innerHTML = evaluate(data, this.template);
		return _tmpNode.firstChild;
	};
	*/

})();