@arcgis/core/views/2d/tiling/TileCache.js

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

/* COPYRIGHT Esri - https://js.arcgis.com/5.0.8/LICENSE.txt */
import{squaredDistance as e}from"../../../core/libs/gl-matrix-2/math/vec2.js";class t{constructor(e,t,i){this.maxSize=e,this._tilingScheme=t,this._removedFunc=i,this._tilePerId=new Map,this._tileKeysPerLevel=[]}clear(){if(this._removedFunc)for(const e of this._tilePerId.values())this._removedFunc(e);this._tilePerId.clear(),this._tileKeysPerLevel=[]}has(e){return this._tilePerId.has(e)}get(e){return this._tilePerId.get(e)}pop(e){const t=this._tilePerId.get(e);if(!t)return;const r=t.key.level,s=this._tileKeysPerLevel[r];i(this._tilePerId,e);for(let i=0;i<s.length;i++)if(s[i].id===e){s.splice(i,1);break}return t.visible=!0,t}add(e){e.visible=!1;const t=e.key,i=t.id;if(this._tilePerId.has(i))return;this._tilePerId.set(i,e);const r=t.level;this._tileKeysPerLevel[r]||(this._tileKeysPerLevel[r]=[]),this._tileKeysPerLevel[r].push(t)}prune(e,t,i){let r=this._tilePerId.size;if(r<=this.maxSize)return;let s=this._tileKeysPerLevel.length-1;for(;r>this.maxSize&&s>=0;)s!==e&&(r=this._pruneAroundCenterTile(r,t,i,s)),s--;r>this.maxSize&&(r=this._pruneAroundCenterTile(r,t,i,e))}_pruneAroundCenterTile(t,i,r,s){const l=this._tileKeysPerLevel[s];if(!l||0===l.length)return t;const{size:h,origin:n}=this._tilingScheme,o=r*h[0],_=r*h[1],c=[0,0],d=[0,0];for(l.sort((t,r)=>(c[0]=n.x+o*(t.col+.5),c[1]=n.y-_*(t.row+.5),d[0]=n.x+o*(r.col+.5),d[1]=n.y-_*(r.row+.5),e(c,i)-e(d,i)));l.length>0;){const e=l.pop();if(this._removeTile(e.id),--t===this.maxSize)break}return t}_removeTile(e){const t=this._tilePerId.get(e);this._removedFunc&&t&&this._removedFunc(t),i(this._tilePerId,e)}}function i(e,t){e.delete(t)}export{t as default};