@arcgis/core/layers/support/PromiseQueue.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/*
All material copyright ESRI, All Rights Reserved, unless otherwise specified.
See https://js.arcgis.com/4.32/esri/copyright.txt for details.
*/
import{isAborted as s,createAbortError as t,isPromiseLike as e}from"../../core/promiseUtils.js";import{signal as r}from"../../core/signal.js";import{Yield as n}from"../../views/support/Yield.js";class i{constructor(){this._tasks=new Array,this._runningTasks=r(0)}get length(){return this._tasks.length}get running(){return this._runningTasks.value>0}destroy(){this.cancelAll()}runTask(s){if(0===this.length)return n;for(;!s.done&&this._process(s);)s.madeProgress()}push(s,t,e){return++this._runningTasks.value,new Promise(((r,n)=>this._tasks.push(new a(r,n,s,t,e)))).finally((()=>--this._runningTasks.value))}unshift(s,t,e){return++this._runningTasks.value,new Promise(((r,n)=>this._tasks.unshift(new a(r,n,s,t,e)))).finally((()=>--this._runningTasks.value))}_process(r){if(0===this._tasks.length)return!1;const n=this._tasks.shift();try{const i=s(n.signal);if(i&&!n.abortCallback)n.reject(t());else{const s=i?n.abortCallback?.(t()):n.callback(r);e(s)?s.then(n.resolve,n.reject):n.resolve(s)}}catch(i){n.reject(i)}return!0}cancelAll(){const s=t();for(const t of this._tasks)if(t.abortCallback){const e=t.abortCallback(s);t.resolve(e)}else t.reject(s);this._tasks.length=0}}class a{constructor(s,t,e,r=void 0,n=void 0){this.resolve=s,this.reject=t,this.callback=e,this.signal=r,this.abortCallback=n}}export{i as PromiseQueue};