mapcomplete/Logic/AvailableBaseLayers.ts

184 lines
No EOL
6.2 KiB
TypeScript

import * as editorlayerindex from "../assets/editor-layer-index.json"
import {UIEventSource} from "./UIEventSource";
import {GeoOperations} from "./GeoOperations";
import {State} from "../State";
import {Basemap} from "./Leaflet/Basemap";
import {QueryParameters} from "./Web/QueryParameters";
import {BaseLayer} from "./BaseLayer";
/**
* Calculates which layers are available at the current location
*/
export default class AvailableBaseLayers {
public static layerOverview = AvailableBaseLayers.LoadRasterIndex().concat(AvailableBaseLayers.LoadProviderIndex());
public availableEditorLayers: UIEventSource<BaseLayer[]>;
constructor(state: State) {
const self = this;
this.availableEditorLayers =
state.locationControl.map(
(currentLocation) => {
const currentLayers = self.availableEditorLayers?.data;
const newLayers = AvailableBaseLayers.AvailableLayersAt(currentLocation?.lon, currentLocation?.lat);
if (currentLayers === undefined) {
return newLayers;
}
if (newLayers.length !== currentLayers.length) {
return newLayers;
}
for (let i = 0; i < newLayers.length; i++) {
if (newLayers[i].name !== currentLayers[i].name) {
return newLayers;
}
}
return currentLayers;
});
this.availableEditorLayers.addCallbackAndRun(availableLayers => {
const layerControl = (state.bm as Basemap).CurrentLayer;
const currentLayer = layerControl.data.id;
for (const availableLayer of availableLayers) {
if (availableLayer.id === currentLayer) {
if (availableLayer.max_zoom < state.locationControl.data.zoom) {
break;
}
if (availableLayer.min_zoom > state.locationControl.data.zoom) {
break;
}
return; // All good!
}
}
// Oops, we panned out of range for this layer!
console.log("AvailableBaseLayers-actor: detected that the current bounds aren't sufficient anymore - reverting to OSM standard")
layerControl.setData(Basemap.osmCarto);
});
}
public static AvailableLayersAt(lon: number, lat: number): BaseLayer[] {
const availableLayers = [Basemap.osmCarto]
const globalLayers = [];
for (const i in AvailableBaseLayers.layerOverview) {
const layer = AvailableBaseLayers.layerOverview[i];
if (layer.feature?.geometry === undefined || layer.feature?.geometry === null) {
globalLayers.push(layer);
continue;
}
if (lon === undefined || lat === undefined) {
continue;
}
if (GeoOperations.inside([lon, lat], layer.feature)) {
availableLayers.push(layer);
}
}
return availableLayers.concat(globalLayers);
}
private static LoadRasterIndex(): BaseLayer[] {
const layers: BaseLayer[] = []
// @ts-ignore
const features = editorlayerindex.features;
for (const i in features) {
const layer = features[i];
const props = layer.properties;
if (props.id === "Bing") {
// Doesnt work
continue;
}
if (props.id === "MAPNIK") {
// Already added by default
continue;
}
if (props.overlay) {
continue;
}
if (props.url.toLowerCase().indexOf("apikey") > 0) {
continue;
}
if(props.max_zoom < 19){
// We want users to zoom to level 19 when adding a point
// If they are on a layer which hasn't enough precision, they can not zoom far enough. This is confusing, so we don't use this layer
continue;
}
if(props.name === undefined){
console.warn("Editor layer index: name not defined on ", props)
continue
}
const leafletLayer = Basemap.CreateBackgroundLayer(
props.id,
props.name,
props.url,
props.name,
props.license_url,
props.max_zoom,
props.type.toLowerCase() === "wms",
props.type.toLowerCase() === "wmts"
)
// Note: if layer.geometry is null, there is global coverage for this layer
layers.push({
id: props.id,
max_zoom: props.max_zoom ?? 25,
min_zoom: props.min_zoom ?? 1,
name: props.name,
layer: leafletLayer,
feature: layer
});
}
return layers;
}
private static LoadProviderIndex(): BaseLayer[] {
function l(id: string, name: string){
const layer = Basemap.ProvidedLayer(id);
return {
feature: null,
id: id,
name: name,
layer: layer,
min_zoom: layer.minzoom,
max_zoom: layer.maxzoom
}
}
return [
l("Stamen.TonerLite", "Toner Lite (by Stamen)"),
l("Stamen.TonerBackground", "Toner Background - no labels (by Stamen)"),
l("Stamen.Watercolor", "Watercolor (by Stamen)"),
l("Stadia.AlidadeSmooth", "Alidade Smooth (by Stadia)"),
l("Stadia.AlidadeSmoothDark", "Alidade Smooth Dark (by Stadia)"),
l("Stadia.OSMBright", "Osm Bright (by Stadia)"),
l("CartoDB.Positron", "Positron (by CartoDB)"),
l("CartoDB.PositronNoLabels", "Positron - no labels (by CartoDB)"),
l("CartoDB.Voyager", "Voyager (by CartoDB)"),
l("CartoDB.VoyagerNoLabels", "Voyager - no labels (by CartoDB)"),
];
}
}