forked from MapComplete/MapComplete
332 lines
12 KiB
TypeScript
332 lines
12 KiB
TypeScript
import { Utils } from "../../Utils"
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import BaseUIElement from "../BaseUIElement"
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import { UIEventSource } from "../../Logic/UIEventSource"
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import Loc from "../../Models/Loc"
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import BaseLayer from "../../Models/BaseLayer"
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import AvailableBaseLayers from "../../Logic/Actors/AvailableBaseLayers"
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import * as L from "leaflet"
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import { Map } from "leaflet"
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import Minimap, { MinimapObj, MinimapOptions } from "./Minimap"
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import { BBox } from "../../Logic/BBox"
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import "leaflet-polylineoffset"
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import { SimpleMapScreenshoter } from "leaflet-simple-map-screenshoter"
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import BackgroundMapSwitch from "../BigComponents/BackgroundMapSwitch"
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import AvailableBaseLayersImplementation from "../../Logic/Actors/AvailableBaseLayersImplementation"
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import ShowDataLayer from "../ShowDataLayer/ShowDataLayer"
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import ShowDataLayerImplementation from "../ShowDataLayer/ShowDataLayerImplementation"
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export default class MinimapImplementation extends BaseUIElement implements MinimapObj {
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private static _nextId = 0
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public readonly leafletMap: UIEventSource<Map>
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public readonly location: UIEventSource<Loc>
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public readonly bounds: UIEventSource<BBox> | undefined
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private readonly _id: string
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private readonly _background: UIEventSource<BaseLayer>
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private _isInited = false
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private _allowMoving: boolean
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private readonly _leafletoptions: any
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private readonly _onFullyLoaded: (leaflet: L.Map) => void
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private readonly _attribution: BaseUIElement | boolean
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private readonly _addLayerControl: boolean
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private readonly _options: MinimapOptions
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private constructor(options?: MinimapOptions) {
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super()
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options = options ?? {}
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this._id = "minimap" + MinimapImplementation._nextId
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MinimapImplementation._nextId++
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this.leafletMap = options.leafletMap ?? new UIEventSource<Map>(undefined)
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this._background =
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options?.background ?? new UIEventSource<BaseLayer>(AvailableBaseLayers.osmCarto)
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this.location = options?.location ?? new UIEventSource<Loc>({ lat: 0, lon: 0, zoom: 1 })
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this.bounds = options?.bounds
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this._allowMoving = options.allowMoving ?? true
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this._leafletoptions = options.leafletOptions ?? {}
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this._onFullyLoaded = options.onFullyLoaded
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this._attribution = options.attribution
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this._addLayerControl = options.addLayerControl ?? false
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this._options = options
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this.SetClass("relative")
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}
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public static initialize() {
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AvailableBaseLayers.implement(new AvailableBaseLayersImplementation())
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Minimap.createMiniMap = (options) => new MinimapImplementation(options)
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ShowDataLayer.actualContstructor = (options) => new ShowDataLayerImplementation(options)
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}
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public installBounds(factor: number | BBox, showRange?: boolean) {
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this.leafletMap.addCallbackD((leaflet) => {
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let bounds: { getEast(); getNorth(); getWest(); getSouth() }
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if (typeof factor === "number") {
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const lbounds = leaflet.getBounds().pad(factor)
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leaflet.setMaxBounds(lbounds)
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bounds = lbounds
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} else {
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// @ts-ignore
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leaflet.setMaxBounds(factor.toLeaflet())
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bounds = factor
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}
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if (showRange) {
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const data = {
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type: "FeatureCollection",
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features: [
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{
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type: "Feature",
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geometry: {
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type: "LineString",
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coordinates: [
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[bounds.getEast(), bounds.getNorth()],
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[bounds.getWest(), bounds.getNorth()],
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[bounds.getWest(), bounds.getSouth()],
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[bounds.getEast(), bounds.getSouth()],
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[bounds.getEast(), bounds.getNorth()],
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],
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},
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},
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],
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}
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// @ts-ignore
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L.geoJSON(data, {
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style: {
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color: "#f44",
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weight: 4,
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opacity: 0.7,
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},
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}).addTo(leaflet)
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}
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})
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}
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Destroy() {
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super.Destroy()
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console.warn("Decomissioning minimap", this._id)
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const mp = this.leafletMap.data
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this.leafletMap.setData(null)
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mp.off()
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mp.remove()
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}
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/**
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* Takes a screenshot of the current map
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* @param format: image: give a base64 encoded png image;
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* @constructor
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*/
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public async TakeScreenshot(): Promise<string>
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public async TakeScreenshot(format: "image"): Promise<string>
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public async TakeScreenshot(format: "blob"): Promise<Blob>
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public async TakeScreenshot(format: "image" | "blob"): Promise<string | Blob>
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public async TakeScreenshot(format: "image" | "blob" = "image"): Promise<string | Blob> {
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console.log("Taking a screenshot...")
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const screenshotter = new SimpleMapScreenshoter()
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screenshotter.addTo(this.leafletMap.data)
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const result = <any>await screenshotter.takeScreen(<any>format ?? "image")
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if (format === "image" && typeof result === "string") {
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return result
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}
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if (format === "blob" && result instanceof Blob) {
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return result
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}
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throw "Something went wrong while creating the screenshot: " + result
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}
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protected InnerConstructElement(): HTMLElement {
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const div = document.createElement("div")
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div.id = this._id
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div.style.height = "100%"
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div.style.width = "100%"
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div.style.minWidth = "40px"
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div.style.minHeight = "40px"
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div.style.position = "relative"
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const wrapper = document.createElement("div")
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wrapper.appendChild(div)
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const self = this
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// @ts-ignore
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const resizeObserver = new ResizeObserver((_) => {
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if (wrapper.clientHeight === 0 || wrapper.clientWidth === 0) {
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return
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}
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if (
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wrapper.offsetParent === null ||
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window.getComputedStyle(wrapper).display === "none"
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) {
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// Not visible
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return
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}
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try {
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self.InitMap()
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} catch (e) {
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console.warn("Could not construct a minimap:", e)
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}
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try {
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self.leafletMap?.data?.invalidateSize()
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} catch (e) {
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console.warn("Could not invalidate size of a minimap:", e)
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}
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})
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resizeObserver.observe(div)
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if (this._addLayerControl) {
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const switcher = new BackgroundMapSwitch(
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{
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locationControl: this.location,
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backgroundLayer: this._background,
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},
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this._background
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).SetClass("top-0 right-0 z-above-map absolute")
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wrapper.appendChild(switcher.ConstructElement())
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}
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return wrapper
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}
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private InitMap() {
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if (this._constructedHtmlElement === undefined) {
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// This element isn't initialized yet
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return
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}
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if (document.getElementById(this._id) === null) {
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// not yet attached, we probably got some other event
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return
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}
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if (this._isInited) {
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return
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}
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this._isInited = true
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const location = this.location
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const self = this
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let currentLayer = this._background.data.layer()
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let latLon = <[number, number]>[location.data?.lat ?? 0, location.data?.lon ?? 0]
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if (isNaN(latLon[0]) || isNaN(latLon[1])) {
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latLon = [0, 0]
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}
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const options = {
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center: latLon,
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zoom: location.data?.zoom ?? 2,
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layers: [currentLayer],
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zoomControl: false,
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attributionControl: this._attribution !== undefined,
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dragging: this._allowMoving,
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scrollWheelZoom: this._allowMoving,
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doubleClickZoom: this._allowMoving,
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keyboard: this._allowMoving,
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touchZoom: this._allowMoving,
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// Disabling this breaks the geojson layer - don't ask me why! zoomAnimation: this._allowMoving,
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fadeAnimation: this._allowMoving,
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maxZoom: 21,
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}
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Utils.Merge(this._leafletoptions, options)
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/*
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* Somehow, the element gets '_leaflet_id' set on chrome.
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* When attempting to init this leaflet map, it'll throw an exception and the map won't show up.
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* Simply removing '_leaflet_id' fixes the issue.
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* See https://github.com/pietervdvn/MapComplete/issues/726
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* */
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delete document.getElementById(this._id)["_leaflet_id"]
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const map = L.map(this._id, options)
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if (self._onFullyLoaded !== undefined) {
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currentLayer.on("load", () => {
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console.log("Fully loaded all tiles!")
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self._onFullyLoaded(map)
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})
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}
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// Users are not allowed to zoom to the 'copies' on the left and the right, stuff goes wrong then
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// We give a bit of leeway for people on the edges
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// Also see: https://www.reddit.com/r/openstreetmap/comments/ih4zzc/mapcomplete_a_new_easytouse_editor/g31ubyv/
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map.setMaxBounds([
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[-100, -200],
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[100, 200],
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])
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if (this._attribution !== undefined) {
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if (this._attribution === true) {
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map.attributionControl.setPrefix(false)
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} else {
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map.attributionControl.setPrefix("<span id='leaflet-attribution'></span>")
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}
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}
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this._background.addCallbackAndRun((layer) => {
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const newLayer = layer.layer()
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if (currentLayer !== undefined) {
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map.removeLayer(currentLayer)
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}
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currentLayer = newLayer
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if (self._onFullyLoaded !== undefined) {
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currentLayer.on("load", () => {
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console.log("Fully loaded all tiles!")
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self._onFullyLoaded(map)
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})
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}
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map.addLayer(newLayer)
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if (self._attribution !== true && self._attribution !== false) {
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self._attribution?.AttachTo("leaflet-attribution")
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}
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})
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let isRecursing = false
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map.on("moveend", function () {
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if (isRecursing) {
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return
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}
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if (
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map.getZoom() === location.data.zoom &&
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map.getCenter().lat === location.data.lat &&
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map.getCenter().lng === location.data.lon
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) {
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return
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}
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location.data.zoom = map.getZoom()
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location.data.lat = map.getCenter().lat
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location.data.lon = map.getCenter().lng
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isRecursing = true
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location.ping()
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if (self.bounds !== undefined) {
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self.bounds.setData(BBox.fromLeafletBounds(map.getBounds()))
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}
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isRecursing = false // This is ugly, I know
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})
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location.addCallback((loc) => {
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const mapLoc = map.getCenter()
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const dlat = Math.abs(loc.lat - mapLoc[0])
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const dlon = Math.abs(loc.lon - mapLoc[1])
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if (dlat < 0.000001 && dlon < 0.000001 && map.getZoom() === loc.zoom) {
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return
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}
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map.setView([loc.lat, loc.lon], loc.zoom)
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})
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if (self.bounds !== undefined) {
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self.bounds.setData(BBox.fromLeafletBounds(map.getBounds()))
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}
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if (this._options.lastClickLocation) {
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const lastClickLocation = this._options.lastClickLocation
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map.on("click", function (e) {
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// @ts-ignore
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lastClickLocation?.setData({ lat: e.latlng.lat, lon: e.latlng.lng })
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})
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map.on("contextmenu", function (e) {
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// @ts-ignore
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lastClickLocation?.setData({ lat: e.latlng.lat, lon: e.latlng.lng })
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})
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}
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this.leafletMap.setData(map)
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}
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}
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