source: trip-planner-front/node_modules/sockjs-client/lib/event/emitter.js@ e29cc2e

Last change on this file since e29cc2e was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 1.2 KB
Line 
1'use strict';
2
3var inherits = require('inherits')
4 , EventTarget = require('./eventtarget')
5 ;
6
7function EventEmitter() {
8 EventTarget.call(this);
9}
10
11inherits(EventEmitter, EventTarget);
12
13EventEmitter.prototype.removeAllListeners = function(type) {
14 if (type) {
15 delete this._listeners[type];
16 } else {
17 this._listeners = {};
18 }
19};
20
21EventEmitter.prototype.once = function(type, listener) {
22 var self = this
23 , fired = false;
24
25 function g() {
26 self.removeListener(type, g);
27
28 if (!fired) {
29 fired = true;
30 listener.apply(this, arguments);
31 }
32 }
33
34 this.on(type, g);
35};
36
37EventEmitter.prototype.emit = function() {
38 var type = arguments[0];
39 var listeners = this._listeners[type];
40 if (!listeners) {
41 return;
42 }
43 // equivalent of Array.prototype.slice.call(arguments, 1);
44 var l = arguments.length;
45 var args = new Array(l - 1);
46 for (var ai = 1; ai < l; ai++) {
47 args[ai - 1] = arguments[ai];
48 }
49 for (var i = 0; i < listeners.length; i++) {
50 listeners[i].apply(this, args);
51 }
52};
53
54EventEmitter.prototype.on = EventEmitter.prototype.addListener = EventTarget.prototype.addEventListener;
55EventEmitter.prototype.removeListener = EventTarget.prototype.removeEventListener;
56
57module.exports.EventEmitter = EventEmitter;
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