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143 lines
3.1 KiB
143 lines
3.1 KiB
'use strict'; |
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function EventPubSub() { |
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this._events_={}; |
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this.publish=this.trigger=this.emit=emit; |
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this.subscribe=this.on=on; |
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this.once=once; |
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this.unSubscribe=this.off=off; |
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this.emit$=emit$; |
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function on(type,handler,once){ |
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if(!handler){ |
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throw new ReferenceError('handler not defined.'); |
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} |
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if(!this._events_[type]){ |
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this._events_[type]=[]; |
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} |
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if(once){ |
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handler._once_ = once; |
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} |
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this._events_[type].push(handler); |
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return this; |
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} |
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function once(type,handler){ |
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return this.on(type, handler, true); |
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} |
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function off(type,handler){ |
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if(!this._events_[type]){ |
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return this; |
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} |
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if(!handler){ |
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throw new ReferenceError('handler not defined. if you wish to remove all handlers from the event please pass "*" as the handler'); |
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} |
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if(handler=='*'){ |
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delete this._events_[type]; |
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return this; |
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} |
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var handlers=this._events_[type]; |
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while(handlers.includes(handler)){ |
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handlers.splice( |
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handlers.indexOf(handler), |
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1 |
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); |
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} |
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if(handlers.length<1){ |
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delete this._events_[type]; |
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} |
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return this; |
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} |
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function emit(type){ |
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this.emit$.apply(this, arguments); |
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if(!this._events_[type]){ |
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return this; |
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} |
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arguments.splice=Array.prototype.splice; |
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arguments.splice(0,1); |
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var handlers=this._events_[type]; |
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var onceHandled=[]; |
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for(var i in handlers){ |
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var handler=handlers[i]; |
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handler.apply(this, arguments); |
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if(handler._once_){ |
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onceHandled.push(handler); |
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} |
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} |
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for(var i in onceHandled){ |
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this.off( |
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type, |
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onceHandled[i] |
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); |
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} |
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return this; |
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} |
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function emit$(type, args){ |
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if(!this._events_['*']){ |
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return this; |
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} |
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var catchAll=this._events_['*']; |
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args.shift=Array.prototype.shift; |
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args.shift(type); |
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for(var handler of catchAll){ |
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handler.apply(this, args); |
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} |
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return this; |
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} |
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return this; |
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} |
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if (!Array.prototype.includes) { |
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Array.prototype.includes = function(searchElement /*, fromIndex*/) { |
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'use strict'; |
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if (this == null) { |
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throw new TypeError('Array.prototype.includes called on null or undefined'); |
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} |
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var O = Object(this); |
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var len = parseInt(O.length, 10) || 0; |
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if (len === 0) { |
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return false; |
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} |
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var n = parseInt(arguments[1], 10) || 0; |
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var k; |
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if (n >= 0) { |
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k = n; |
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} else { |
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k = len + n; |
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if (k < 0) {k = 0;} |
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} |
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var currentElement; |
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while (k < len) { |
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currentElement = O[k]; |
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if (searchElement === currentElement || |
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(searchElement !== searchElement && currentElement !== currentElement)) { // NaN !== NaN |
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return true; |
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} |
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k++; |
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} |
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return false; |
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}; |
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} |
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module.exports=EventPubSub;
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