@arcgis/core/views/2d/tiling/TileQueue.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/4.33/esri/copyright.txt for details.
*/
import{_ as e}from"../../../chunks/tslib.es6.js";import t from"../../../core/Accessor.js";import{getOrCreateMapValue as s}from"../../../core/MapUtils.js";import{destroyMaybe as o}from"../../../core/maybe.js";import{someSet as r}from"../../../core/SetUtils.js";import{property as i}from"../../../core/accessorSupport/decorators/property.js";import"../../../core/has.js";import"../../../core/Logger.js";import"../../../core/RandomLCG.js";import{subclass as c}from"../../../core/accessorSupport/decorators/subclass.js";import{distance as u}from"../../../core/libs/gl-matrix-2/math/vec2.js";import{ScheduledQueueProcessor as n}from"../../support/ScheduledQueueProcessor.js";const l=[0,0];let h=class extends t{constructor(e){super(e),this._keyToItem=new Map,this._tilesByScale=new Map,this.concurrency=6}initialize(){const{concurrency:e,process:t,scheduler:s,priority:o}=this;this._queue=new n({concurrency:e,scheduler:s,priority:o,process:(e,s)=>{const o=this._keyToItem.get(e);return t(o,{signal:s})},peeker:e=>this._peek(e)})}destroy(){this.clear(),this._queue=o(this._queue)}get length(){return this._queue?this._queue.length:0}abort(e){const t="string"==typeof e?e:e.id;this._queue.abort(t)}clear(){this._queue.clear(),this._keyToItem.clear(),this._tilesByScale.clear()}has(e){return"string"==typeof e?this._keyToItem.has(e):this._keyToItem.has(e.id)}pause(){this._queue.pause()}push(e){const t=e.key.id;if(this._queue.has(t))return this._queue.get(t);const o=this._queue.push(t),r=this.tileInfoView.getTileScale(e.key),i=s(this._tilesByScale,r,(()=>new Set)),c=()=>{i.delete(e.key),0===i.size&&this._tilesByScale.delete(r),this._keyToItem.delete(t)};return i.add(e.key),this._keyToItem.set(t,e),o.then(c,c),o}reset(){this._queue.reset()}resume(){this._queue.resume()}_peek(e){if(!this.state)return e.values().next().value;const t=new Set;for(const r of e)t.add(this._keyToItem.get(r).key);const s=this.state.scale;let o,i=Number.POSITIVE_INFINITY;for(const[c,u]of this._tilesByScale){if(r(u,(e=>t.has(e)))){const e=Math.abs(c-s);e<i&&(o=u,i=e)}}return this._getClosestTileKey(o,e).id}_getClosestTileKey(e,t){const s=this.tileInfoView,o=this.state.center;let r,i=Number.POSITIVE_INFINITY;for(const c of e)if(t.has(c.id)){s.getTileCoords(l,c);const e=u(l,o);e<i&&(i=e,r=c)}return r}};e([i({constructOnly:!0})],h.prototype,"concurrency",void 0),e([i({constructOnly:!0})],h.prototype,"priority",void 0),e([i({constructOnly:!0})],h.prototype,"process",void 0),e([i({constructOnly:!0})],h.prototype,"scheduler",void 0),e([i()],h.prototype,"state",void 0),e([i({constructOnly:!0})],h.prototype,"tileInfoView",void 0),h=e([c("esri.views.2d.tiling.TileQueue")],h);const p=h;export{p as default};