mapcomplete/UI/ShowDataLayer.ts
2021-01-04 18:55:10 +01:00

147 lines
No EOL
5.1 KiB
TypeScript

/**
* The data layer shows all the given geojson elements with the appropriate icon etc
*/
import {UIEventSource} from "../Logic/UIEventSource";
import * as L from "leaflet"
import "leaflet.markercluster"
import LayerConfig from "../Customizations/JSON/LayerConfig";
import State from "../State";
import LazyElement from "./Base/LazyElement";
import Hash from "../Logic/Web/Hash";
import {GeoOperations} from "../Logic/GeoOperations";
import FeatureInfoBox from "./Popup/FeatureInfoBox";
import LayoutConfig from "../Customizations/JSON/LayoutConfig";
export default class ShowDataLayer {
private readonly _layerDict;
private readonly _leafletMap: UIEventSource<L.Map>;
constructor(features: UIEventSource<{ feature: any, freshness: Date }[]>,
leafletMap: UIEventSource<L.Map>,
layoutToUse: LayoutConfig) {
this._leafletMap = leafletMap;
const self = this;
let oldGeoLayer: L.Layer = undefined;
this._layerDict = {};
for (const layer of layoutToUse.layers) {
this._layerDict[layer.id] = layer;
}
function update() {
if (features.data === undefined) {
return;
}
if (leafletMap.data === undefined) {
return;
}
const mp = leafletMap.data;
const feats = features.data.map(ff => ff.feature);
let geoLayer = self.CreateGeojsonLayer(feats)
const cl = window["L"];
const cluster = cl.markerClusterGroup();
cluster.addLayer(geoLayer);
geoLayer = cluster;
if (oldGeoLayer) {
mp.removeLayer(oldGeoLayer);
}
mp.addLayer(geoLayer);
oldGeoLayer = geoLayer;
}
features.addCallbackAndRun(() => update());
leafletMap.addCallback(() => update());
}
private createStyleFor(feature) {
const tagsSource = State.state.allElements.getEventSourceFor(feature);
// Every object is tied to exactly one layer
const layer = this._layerDict[feature._matching_layer_id];
return layer.GenerateLeafletStyle(tagsSource, layer._showOnPopup !== undefined);
}
private pointToLayer(feature, latLng): L.Layer {
// Leaflet cannot handle geojson points natively
// We have to convert them to the appropriate icon
// Click handling is done in the next step
const tagSource = State.state.allElements.getEventSourceFor(feature);
const layer: LayerConfig = this._layerDict[feature._matching_layer_id];
const style = layer.GenerateLeafletStyle(tagSource, !(layer.title === undefined && (layer.tagRenderings ?? []).length === 0));
return L.marker(latLng, {
icon: L.divIcon({
html: style.icon.html.Render(),
className: style.icon.className,
iconAnchor: style.icon.iconAnchor,
iconUrl: style.icon.iconUrl,
popupAnchor: style.icon.popupAnchor,
iconSize: style.icon.iconSize
})
});
}
private postProcessFeature(feature, leafletLayer: L.Layer) {
const layer: LayerConfig = this._layerDict[feature._matching_layer_id];
if (layer.title === undefined && (layer.tagRenderings ?? []).length === 0) {
// No popup action defined -> Don't do anything
return;
}
const popup = L.popup({
autoPan: true,
closeOnEscapeKey: true,
}, leafletLayer);
const tags = State.state.allElements.getEventSourceFor(feature);
let uiElement: LazyElement = new LazyElement(() => new FeatureInfoBox(tags, layer));
popup.setContent(uiElement.Render());
leafletLayer.bindPopup(popup);
// We first render the UIelement (which'll still need an update later on...)
// But at least it'll be visible already
leafletLayer.on("click", (e) => {
// We set the element as selected...
uiElement.Activate();
State.state.selectedElement.setData(feature);
});
if (feature.properties.id.replace(/\//g, "_") === Hash.Get().data) {
// This element is in the URL, so this is a share link
// We already open it
uiElement.Activate();
popup.setContent(uiElement.Render());
const center = GeoOperations.centerpoint(feature).geometry.coordinates;
popup.setLatLng({lat: center[1], lng: center[0]});
popup.openOn(State.state.leafletMap.data);
State.state.selectedElement.setData(feature);
uiElement.Update();
}
}
private CreateGeojsonLayer(features: any[]): L.Layer {
const self = this;
const data = {
type: "FeatureCollection",
features: features
}
return L.geoJSON(data, {
style: feature => self.createStyleFor(feature),
pointToLayer: (feature, latLng) => self.pointToLayer(feature, latLng),
onEachFeature: (feature, leafletLayer) => self.postProcessFeature(feature, leafletLayer)
});
}
}