Module 20816

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