@arcgis/core/views/2d/constraints/ZoomConstraint.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{__decorate as e}from"tslib";import t from"../../../core/Accessor.js";import{NumericIdentifiableMixin as o}from"../../../core/NumericIdentifiable.js";import{property as s,subclass as i}from"../../../core/accessorSupport/decorators.js";var a;let c=a=class extends(o(t)){constructor(e){super(e),this._lodByScale={},this._scales=[],this.effectiveLODs=null,this.effectiveMinZoom=-1,this.effectiveMaxZoom=-1,this.effectiveMinScale=0,this.effectiveMaxScale=0,this.lods=null,this.minZoom=-1,this.maxZoom=-1,this.minScale=0,this.maxScale=0,this.snapToZoom=!0}initialize(){let e,{lods:t,minScale:o,maxScale:s,minZoom:i,maxZoom:a}=this,c=-1,l=-1,r=!1,n=!1;if(0!==o&&0!==s&&o<s&&([o,s]=[s,o]),!t?.length)return this._set("effectiveMinScale",o),void this._set("effectiveMaxScale",s);t=t.map(e=>e.clone()),t.sort((e,t)=>t.scale-e.scale),t.forEach((e,t)=>e.level=t);for(const f of t)!r&&o>0&&o>=f.scale&&(c=f.level,r=!0),!n&&s>0&&s>=f.scale&&(l=e?e.level:-1,n=!0),e=f;-1===i&&(i=0===o?0:c),-1===a&&(a=0===s?t.length-1:l),i=Math.max(i,0),i=Math.min(i,t.length-1),a=Math.max(a,0),a=Math.min(a,t.length-1),i>a&&([i,a]=[a,i]),o=t[i].scale,s=t[a].scale,t.splice(0,i),t.splice(a-i+1),t.forEach((e,t)=>{this._lodByScale[e.scale]=e,this._scales[t]=e.scale}),this._set("effectiveLODs",t),this._set("effectiveMinZoom",i),this._set("effectiveMaxZoom",a),this._set("effectiveMinScale",o),this._set("effectiveMaxScale",s)}constrain(e,t){if(e.scale===t?.scale)return e;const o=this.effectiveMinScale,s=this.effectiveMaxScale,i=e.targetGeometry,a=t&&t.targetGeometry,c=0!==s&&e.scale<s,l=0!==o&&e.scale>o;if(c||l){const c=l?o:s;if(t&&a){const o=(c-t.scale)/(e.scale-t.scale);i.x=a.x+(i.x-a.x)*o,i.y=a.y+(i.y-a.y)*o}e.scale=c}return this.snapToZoom&&this.effectiveLODs&&(e.scale=this._getClosestScale(e.scale)),e}fit(e){if(!this.effectiveLODs||!this.snapToZoom)return this.constrain(e,null);const t=this.scaleToZoom(e.scale),o=Math.abs(t-Math.floor(t));return e.scale=this.zoomToScale(o>.99?Math.round(t):Math.floor(t)),e}zoomToScale(e){if(!this.effectiveLODs)return 0;e-=this.effectiveMinZoom,e=Math.max(0,e);const t=this._scales;if(e<=0)return t[0];if(e>=t.length)return t[t.length-1];const o=Math.floor(e),s=Math.ceil(e);return t[o]+(e-o)*(t[s]-t[o])}scaleToZoom(e){if(!this.effectiveLODs)return-1;const t=this._scales;let o,s;if(e>=t[0])return this.effectiveMinZoom;if(e<=t[t.length-1])return this.effectiveMaxZoom;for(let i=0;i<t.length-1;i++){if(o=t[i],s=t[i+1],s===e){return i+this.effectiveMinZoom+1}if(o>e&&s<e){return i+this.effectiveMinZoom+1-(e-s)/(o-s)}}return-1}snapToClosestScale(e){if(!this.effectiveLODs)return e;const t=this.scaleToZoom(e);return this.zoomToScale(Math.round(t))}snapToNextScale(e,t=.5){if(!this.effectiveLODs)return e*t;const o=Math.round(this.scaleToZoom(e));return this.zoomToScale(o+1)}snapToPreviousScale(e,t=2){if(!this.effectiveLODs)return e*t;const o=Math.round(this.scaleToZoom(e));return this.zoomToScale(o-1)}clone(){return new a({lods:this.lods,minZoom:this.minZoom,maxZoom:this.maxZoom,minScale:this.minScale,maxScale:this.maxScale})}_getClosestScale(e){return this._lodByScale[e]||(e=this._scales.reduce((t,o)=>Math.abs(o-e)<=Math.abs(t-e)?o:t,this._scales[0])),this._lodByScale[e].scale}};e([s({readOnly:!0})],c.prototype,"effectiveLODs",void 0),e([s({readOnly:!0})],c.prototype,"effectiveMinZoom",void 0),e([s({readOnly:!0})],c.prototype,"effectiveMaxZoom",void 0),e([s({readOnly:!0})],c.prototype,"effectiveMinScale",void 0),e([s({readOnly:!0})],c.prototype,"effectiveMaxScale",void 0),e([s()],c.prototype,"lods",void 0),e([s()],c.prototype,"minZoom",void 0),e([s()],c.prototype,"maxZoom",void 0),e([s()],c.prototype,"minScale",void 0),e([s()],c.prototype,"maxScale",void 0),e([s()],c.prototype,"snapToZoom",void 0),c=a=e([i("esri.views.2d.constraints.ZoomConstraint")],c);const l=c;export{l as default};