Module 20816

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