https://subs.springwise.com/JavaScript/mootools/core/Class/Class.Extras.js

1/*
2---
3
4name: Class.Extras
5
6description: Contains Utility Classes that can be implemented into your own Classes to ease the execution of many common tasks.
7
8license: MIT-style license.
9
10requires: Class
11
12provides: [Class.Extras, Chain, Events, Options]
13
14...
15*/
16
17(function(){
18
19this.Chain = new Class({
20
21	$chain: [],
22
23	chain: function(){
24		this.$chain.append(Array.flatten(arguments));
25		return this;
26	},
27
28	callChain: function(){
29		return (this.$chain.length) ? this.$chain.shift().apply(this, arguments) : false;
30	},
31
32	clearChain: function(){
33		this.$chain.empty();
34		return this;
35	}
36
37});
38
39var removeOn = function(string){
40	return string.replace(/^on([A-Z])/, function(full, first){
41		return first.toLowerCase();
42	});
43};
44
45this.Events = new Class({
46
47	$events: {},
48
49	addEvent: function(type, fn, internal){
50		type = removeOn(type);
51
52		/*<1.2compat>*/
53		if (fn == $empty) return this;
54		/*</1.2compat>*/
55
56		this.$events[type] = (this.$events[type] || []).include(fn);
57		if (internal) fn.internal = true;
58		return this;
59	},
60
61	addEvents: function(events){
62		for (var type in events) this.addEvent(type, events[type]);
63		return this;
64	},
65
66	fireEvent: function(type, args, delay){
67		type = removeOn(type);
68		var events = this.$events[type];
69		if (!events) return this;
70		args = Array.from(args);
71		events.each(function(fn){
72			if (delay) fn.delay(delay, this, args);
73			else fn.apply(this, args);
74		}, this);
75		return this;
76	},
77
78	removeEvent: function(type, fn){
79		type = removeOn(type);
80		var events = this.$events[type];
81		if (events && !fn.internal){
82			var index = events.indexOf(fn);
83			if (index != -1) delete events[index];
84		}
85		return this;
86	},
87
88	removeEvents: function(events){
89		var type;
90		if (typeOf(events) == 'object'){
91			for (type in events) this.removeEvent(type, events[type]);
92			return this;
93		}
94		if (events) events = removeOn(events);
95		for (type in this.$events){
96			if (events && events != type) continue;
97			var fns = this.$events[type];
98			for (var i = fns.length; i--;) if (i in fns){
99				this.removeEvent(type, fns[i]);
100			}
101		}
102		return this;
103	}
104
105});
106
107this.Options = new Class({
108
109	setOptions: function(){
110		var options = this.options = Object.merge.apply(null, [{}, this.options].append(arguments));
111		if (this.addEvent) for (var option in options){
112			if (typeOf(options[option]) != 'function' || !(/^on[A-Z]/).test(option)) continue;
113			this.addEvent(option, options[option]);
114			delete options[option];
115		}
116		return this;
117	}
118
119});
120
121})();