@arcgis/core/views/2d/layers/features/support/DisplayIdGenerator.js

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

/* COPYRIGHT Esri - https://js.arcgis.com/5.0.19/LICENSE.txt */
import{estimateNumberArrayMemory as e}from"../../../../../core/memoryEstimations.js";import{createDisplayId as t}from"../../../engine/webgl/DisplayId.js";class s{constructor(e){this.data=e,this._referenceCount=0}static{this.estimatedMemory=20}increment(){this._referenceCount+=1}decrement(){this._referenceCount-=1}empty(){return 0===this._referenceCount}}class r{constructor(){this._freeIdsGenerationA=[],this._freeIdsGenerationB=[],this._idCounter=1,this._freeIds=this._freeIdsGenerationA,this._objectIdToDisplayId=new Map}get usedMemory(){let t=0;return t+=e(this._freeIdsGenerationA),t+=e(this._freeIdsGenerationB),t+=this._objectIdToDisplayId.size*(s.estimatedMemory+8),t}createIdForObjectId(e){let r=this._objectIdToDisplayId.get(e);return r?r.increment():(r=new s(t(this._getFreeId(),!1)),r.increment(),this._objectIdToDisplayId.set(e,r)),r.data}releaseIdForObjectId(e){const t=this._objectIdToDisplayId.get(e);t&&(t.decrement(),t.empty()&&(this._objectIdToDisplayId.delete(e),this._freeIds.push(t.data)))}getDisplayIdForObjectId(e){const t=this._objectIdToDisplayId.get(e);return null!=t?t.data:null}releaseAll(){for(const e of this._objectIdToDisplayId.values())this._freeIds.push(e.data);this._objectIdToDisplayId.clear()}incrementGeneration(){this._freeIds=this._freeIds===this._freeIdsGenerationA?this._freeIdsGenerationB:this._freeIdsGenerationA}_getFreeId(){return this._freeIds.length?this._freeIds.pop():this._idCounter++}}export{r as DisplayIdGenerator};