https://www.wkforum.org/2022/assets/js/FWDRLEventDispatcher.js?v=1790289095

1(function (){
2	
3	var FWDRLEventDispatcher = function (){
4		
5	    this.listeners = {events_ar:[]};
6	     
7	    this.addListener = function (type, listener){
8	    	
9	    	if(type == undefined) throw Error("type is required.");
10	    	if(typeof type === "object") throw Error("type must be of type String.");
11	    	if(typeof listener != "function") throw Error("listener must be of type Function.");
12	    	
13	    	
14	        var event = {};
15	        event.type = type;
16	        event.listener = listener;
17	        event.target = this;
18	        this.listeners.events_ar.push(event);
19	    };
20	    
21	    this.dispatchEvent = function(type, props){
22	    	if(this.listeners == null) return;
23	    	if(type == undefined) throw Error("type is required.");
24	    	if(typeof type === "object") throw Error("type must be of type String.");
25	    	
26	        for (var i=0, len=this.listeners.events_ar.length; i < len; i++){
27	        	if(this.listeners.events_ar[i].target === this && this.listeners.events_ar[i].type === type){		
28	    	        if(props){
29	    	        	for(var prop in props){
30	    	        		this.listeners.events_ar[i][prop] = props[prop];
31	    	        	}
32	    	        }
33	        		this.listeners.events_ar[i].listener.call(this, this.listeners.events_ar[i]);
34	        	}
35	        }
36	    };
37	    
38	   this.removeListener = function(type, listener){
39	    	
40	    	if(type == undefined) throw Error("type is required.");
41	    	if(typeof type === "object") throw Error("type must be of type String.");
42	    	if(typeof listener != "function") throw Error("listener must be of type Function." + type);
43	    	
44	        for (var i=0, len=this.listeners.events_ar.length; i < len; i++){
45	        	if(this.listeners.events_ar[i].target === this 
46	        			&& this.listeners.events_ar[i].type === type
47	        			&& this.listeners.events_ar[i].listener ===  listener
48	        	){
49	        		this.listeners.events_ar.splice(i,1);
50	        		break;
51	        	}
52	        }  
53	    };
54	    
55	    /* destroy */
56	    this.destroy = function(){
57	    	this.listeners = null;
58	    	
59	    	this.addListener = null;
60		    this.dispatchEvent = null;
61		    this.removeListener = null;
62	    };
63	    
64	};	
65	
66	window.FWDRLEventDispatcher = FWDRLEventDispatcher;
67}(window));