144 lines
3.1 KiB
JavaScript
144 lines
3.1 KiB
JavaScript
'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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