https://hosting.show/engine/lib/internal/template/js/hook.js

1/**
2 * JavaScript-hooks
3 *
4 * Examples:
5 *
6 * - inject function call/code at top of function body
7 * ls.hook.inject([ls.lang,'get'], function(){ls.msg.notice('lang debug');})});
8 * ls.hook.inject([ls,'ajax'], 'alert(url)');
9 *
10 * - add and call hooks
11 * ls.hook.add('somefunc_hook1_name', function(param1, param2){ ... });
12 *
13 * function someFunc(..params..){
14 * 	//code
15 * 	ls.hook.run('somefunc_hook1_name', [param1,param2], thisArg);
16 * 	//code
17 * }
18 *
19 * @author Sergey S Yaglov
20 * @link http://livestreet.ru/profile/1d10t
21 */
22ls.hook = (function ($) {
23	this.hooks = {};
24
25	this.cloneFunc = function(func,as_text,no_def) {
26		var f;
27		if($.type(func)=='string'){
28			eval('f = '+func+';');
29		}else if($.type(func)=='array'){
30			f = func[0][func[1]];
31		}else{
32			f = func;
33		}
34		if($.type(f)=='function'){
35			var fbody = f.toString().replace(/^(function)([^\(]*)\(/gi, '$1 (');
36			if(typeof as_text!='undefined' && as_text){
37				if(typeof no_def!='undefined' && no_def){
38					return fbody.replace(/^[^\{]*\{/gi, '').replace(/\}$/gi, '');
39				}else{
40					return fbody;
41				}
42			}
43			return eval('('+fbody+')');
44		}
45		return function(){};
46	};
47
48	/**
49	 * @param func functionName|object[parentObject,functionName] Name of function that will be modified
50	 * @param funcInj function|string Function or code to be injected
51	 * @param marker string
52	 */
53	this.inject = function(func,funcInj,marker) {
54		var funcBody = ls.hook.cloneFunc(func, 1);
55		var funcDefinition = ($.type(func)=='string'?func:($.type(func)=='array'?'func[0][func[1]]':'func'))+' = ';
56		var replaceFrom = /\{/m;
57		var replaceTo = '{ ';
58		if($.type(marker) == 'string'){
59			//replaceFrom = new RegExp('(\'\\*'+marker+'\\*\'[\r\n\t ]*;?)', 'm');
60			replaceFrom = new RegExp('(ls\\.hook\\.marker\\(([\'"])'+marker+'(\\2)\\)[\\r\\n\\t ]*;?)','m');
61			replaceTo = '$1';
62		}
63		if($.type(funcInj)=='function'){
64			var funcInjName = 'funcInj'+Math.floor(Math.random()*1000000);
65			eval('window["'+funcInjName+'"] = funcInj;');
66			eval(funcDefinition + funcBody.replace(replaceFrom,replaceTo+funcInjName+'.apply(this, arguments); '));
67		}else{
68			eval(funcDefinition  + funcBody.replace(replaceFrom,replaceTo+funcInj+'; '));
69		}
70	};
71
72	this.add = function(name,callback,priority) {
73		var priority = priority || 0;
74		if(typeof ls.hook.hooks[name] == 'undefined'){
75			ls.hook.hooks[name] = [];
76		}
77		ls.hook.hooks[name].push({
78			'callback': callback,
79			'priority': priority
80		});
81	};
82
83	this.run = function(name,params,o) {
84		var params = params || [];
85		var hooks = ls.hook.hooks;
86		if(typeof hooks[name] != 'undefined'){
87			hooks[name].sort(function(a,b){
88				return a.priority > b.priority ?
89					1
90					: (a.priority < b.priority ? -1 : 0)
91					;
92			});
93			$.each(hooks[name], function(i){
94				var callback = hooks[name][i].callback;
95				if($.type(callback) == 'function'){
96					callback.apply(o, params);
97				}else if($.type(callback) == 'array'){
98					//console.log(callback);
99					callback[0][callback[1]].apply(o, params);
100				}else if($.type(callback) == 'string'){
101					eval('(function(){'+callback+'}).apply(o, params);');
102				}else{
103					ls.debug('cant call hook "'+name+'"['+i+']');
104				}
105			});
106		}
107	};
108
109	this.marker = function(name){
110		// noop
111	};
112
113	return this;
114}).call(ls.hook || {},jQuery);