Module 20816

function(e){"use strict";var t=Object.prototype.hasOwnProperty,r="~";function n(){}function i(e,t,r){this.fn=e,this.context=t,this.once=r||!1}function o(e,t,n,o,a){if("function"!=typeof n)throw TypeError("The listener must be a function");var s=new i(n,o||e,a),l=r?r+t:t;return e._events[l]?e._events[l].fn?e._events[l]=[e._events[l],s]:e._events[l].push(s):(e._events[l]=s,e._eventsCount++),e}function a(e,t){0==--e._eventsCount?e._events=new n:delete e._events[t]}function s(){this._events=new n,this._eventsCount=0}Object.create&&(n.prototype=Object.create(null),new n().__proto__||(r=!1)),s.prototype.eventNames=function(){var e,n,i=[];if(0===this._eventsCount)return i;for(n in e=this._events)t.call(e,n)&&i.push(r?n.slice(1):n);return Object.getOwnPropertySymbols?i.concat(Object.getOwnPropertySymbols(e)):i},s.prototype.listeners=function(e){var t=r?r+e:e,n=this._events[t];if(!n)return[];if(n.fn)return[n.fn];for(var i=0,o=n.length,a=Array(o);i<o;i++)a[i]=n[i].fn;return a},s.prototype.listenerCount=function(e){var t=r?r+e:e,n=this._events[t];return n?n.fn?1:n.length:0},s.prototype.emit=function(e,t,n,i,o,a){var s=r?r+e:e;if(!this._events[s])return!1;var l,u,c=this._events[s],f=arguments.length;if(c.fn){switch(c.once&&this.removeListener(e,c.fn,void 0,!0),f){case 1:return c.fn.call(c.context),!0;case 2:return c.fn.call(c.context,t),!0;case 3:return c.fn.call(c.context,t,n),!0;case 4:return c.fn.call(c.context,t,n,i),!0;case 5:return c.fn.call(c.context,t,n,i,o),!0;case 6:return c.fn.call(c.context,t,n,i,o,a),!0}for(u=1,l=Array(f-1);u<f;u++)l[u-1]=arguments[u];c.fn.apply(c.context,l)}else{var d,p=c.length;for(u=0;u<p;u++)switch(c[u].once&&this.removeListener(e,c[u].fn,void 0,!0),f){case 1:c[u].fn.call(c[u].context);break;case 2:c[u].fn.call(c[u].context,t);break;case 3:c[u].fn.call(c[u].context,t,n);break;case 4:c[u].fn.call(c[u].context,t,n,i);break;default:if(!l)for(d=1,l=Array(f-1);d<f;d++)l[d-1]=arguments[d];c[u].fn.apply(c[u].context,l)}}return!0},s.prototype.on=function(e,t,r){return o(this,e,t,r,!1)},s.prototype.once=function(e,t,r){return o(this,e,t,r,!0)},s.prototype.removeListener=function(e,t,n,i){var o=r?r+e:e;if(!this._events[o])return this;if(!t)return a(this,o),this;var s=this._events[o];if(s.fn)s.fn!==t||i&&!s.once||n&&s.context!==n||a(this,o);else{for(var l=0,u=[],c=s.length;l<c;l++)(s[l].fn!==t||i&&!s[l].once||n&&s[l].context!==n)&&u.push(s[l]);u.length?this._events[o]=1===u.length?u[0]:u:a(this,o)}return this},s.prototype.removeAllListeners=function(e){var t;return e?(t=r?r+e:e,this._events[t]&&a(this,t)):(this._events=new n,this._eventsCount=0),this},s.prototype.off=s.prototype.removeListener,s.prototype.addListener=s.prototype.on,s.prefixed=r,s.EventEmitter=s,e.exports=s}