479 lines
17 KiB
TypeScript
479 lines
17 KiB
TypeScript
import {Store, UIEventSource} from "../../Logic/UIEventSource"
|
|
import type {Map as MLMap} from "maplibre-gl"
|
|
import {Map as MlMap, SourceSpecification} from "maplibre-gl"
|
|
import {RasterLayerPolygon} from "../../Models/RasterLayers"
|
|
import {Utils} from "../../Utils"
|
|
import {BBox} from "../../Logic/BBox"
|
|
import {ExportableMap, MapProperties} from "../../Models/MapProperties"
|
|
import SvelteUIElement from "../Base/SvelteUIElement"
|
|
import MaplibreMap from "./MaplibreMap.svelte"
|
|
import {RasterLayerProperties} from "../../Models/RasterLayerProperties"
|
|
import * as htmltoimage from 'html-to-image';
|
|
|
|
/**
|
|
* The 'MapLibreAdaptor' bridges 'MapLibre' with the various properties of the `MapProperties`
|
|
*/
|
|
export class MapLibreAdaptor implements MapProperties, ExportableMap {
|
|
private static maplibre_control_handlers = [
|
|
// "scrollZoom",
|
|
// "boxZoom",
|
|
// "doubleClickZoom",
|
|
"dragRotate",
|
|
"dragPan",
|
|
"keyboard",
|
|
"touchZoomRotate",
|
|
]
|
|
private static maplibre_zoom_handlers = [
|
|
"scrollZoom",
|
|
"boxZoom",
|
|
"doubleClickZoom",
|
|
"touchZoomRotate",
|
|
]
|
|
readonly location: UIEventSource<{ lon: number; lat: number }>
|
|
readonly zoom: UIEventSource<number>
|
|
readonly bounds: UIEventSource<BBox>
|
|
readonly rasterLayer: UIEventSource<RasterLayerPolygon | undefined>
|
|
readonly maxbounds: UIEventSource<BBox | undefined>
|
|
readonly allowMoving: UIEventSource<true | boolean | undefined>
|
|
readonly allowZooming: UIEventSource<true | boolean | undefined>
|
|
readonly lastClickLocation: Store<undefined | { lon: number; lat: number }>
|
|
readonly minzoom: UIEventSource<number>
|
|
readonly maxzoom: UIEventSource<number>
|
|
private readonly _maplibreMap: Store<MLMap>
|
|
/**
|
|
* Used for internal bookkeeping (to remove a rasterLayer when done loading)
|
|
* @private
|
|
*/
|
|
private _currentRasterLayer: string
|
|
|
|
constructor(maplibreMap: Store<MLMap>, state?: Partial<MapProperties>) {
|
|
this._maplibreMap = maplibreMap
|
|
|
|
this.location = state?.location ?? new UIEventSource({lon: 0, lat: 0})
|
|
if (this.location.data) {
|
|
// The MapLibre adaptor updates the element in the location and then pings them
|
|
// Often, code setting this up doesn't expect the object they pass in to be changed, so we create a copy
|
|
this.location.setData({...this.location.data})
|
|
}
|
|
this.zoom = state?.zoom ?? new UIEventSource(1)
|
|
this.minzoom = state?.minzoom ?? new UIEventSource(0)
|
|
this.maxzoom = state?.maxzoom ?? new UIEventSource(24)
|
|
this.zoom.addCallbackAndRunD((z) => {
|
|
if (z < this.minzoom.data) {
|
|
this.zoom.setData(this.minzoom.data)
|
|
}
|
|
const max = Math.min(24, this.maxzoom.data ?? 24)
|
|
if (z > max) {
|
|
this.zoom.setData(max)
|
|
}
|
|
})
|
|
this.maxbounds = state?.maxbounds ?? new UIEventSource(undefined)
|
|
this.allowMoving = state?.allowMoving ?? new UIEventSource(true)
|
|
this.allowZooming = state?.allowZooming ?? new UIEventSource(true)
|
|
this.bounds = state?.bounds ?? new UIEventSource(undefined)
|
|
this.rasterLayer =
|
|
state?.rasterLayer ?? new UIEventSource<RasterLayerPolygon | undefined>(undefined)
|
|
|
|
const lastClickLocation = new UIEventSource<{ lon: number; lat: number }>(undefined)
|
|
this.lastClickLocation = lastClickLocation
|
|
const self = this
|
|
|
|
function handleClick(e) {
|
|
if (e.originalEvent["consumed"]) {
|
|
// Workaround, 'ShowPointLayer' sets this flag
|
|
return
|
|
}
|
|
console.log(e)
|
|
const lon = e.lngLat.lng
|
|
const lat = e.lngLat.lat
|
|
lastClickLocation.setData({lon, lat})
|
|
}
|
|
|
|
maplibreMap.addCallbackAndRunD((map) => {
|
|
map.on("load", () => {
|
|
self.setBackground()
|
|
self.MoveMapToCurrentLoc(self.location.data)
|
|
self.SetZoom(self.zoom.data)
|
|
self.setMaxBounds(self.maxbounds.data)
|
|
self.setAllowMoving(self.allowMoving.data)
|
|
self.setAllowZooming(self.allowZooming.data)
|
|
self.setMinzoom(self.minzoom.data)
|
|
self.setMaxzoom(self.maxzoom.data)
|
|
self.setBounds(self.bounds.data)
|
|
this.updateStores(true)
|
|
})
|
|
self.MoveMapToCurrentLoc(self.location.data)
|
|
self.SetZoom(self.zoom.data)
|
|
self.setMaxBounds(self.maxbounds.data)
|
|
self.setAllowMoving(self.allowMoving.data)
|
|
self.setAllowZooming(self.allowZooming.data)
|
|
self.setMinzoom(self.minzoom.data)
|
|
self.setMaxzoom(self.maxzoom.data)
|
|
self.setBounds(self.bounds.data)
|
|
this.updateStores(true)
|
|
map.on("moveend", () => this.updateStores())
|
|
map.on("click", (e) => {
|
|
handleClick(e)
|
|
})
|
|
map.on("contextmenu", (e) => {
|
|
handleClick(e)
|
|
})
|
|
map.on("dblclick", (e) => {
|
|
handleClick(e)
|
|
})
|
|
})
|
|
|
|
this.rasterLayer.addCallback((_) =>
|
|
self.setBackground().catch((_) => {
|
|
console.error("Could not set background")
|
|
})
|
|
)
|
|
|
|
this.location.addCallbackAndRunD((loc) => {
|
|
self.MoveMapToCurrentLoc(loc)
|
|
})
|
|
this.zoom.addCallbackAndRunD((z) => self.SetZoom(z))
|
|
this.maxbounds.addCallbackAndRun((bbox) => self.setMaxBounds(bbox))
|
|
this.allowMoving.addCallbackAndRun((allowMoving) => self.setAllowMoving(allowMoving))
|
|
this.allowZooming.addCallbackAndRun((allowZooming) => self.setAllowZooming(allowZooming))
|
|
this.bounds.addCallbackAndRunD((bounds) => self.setBounds(bounds))
|
|
}
|
|
|
|
/**
|
|
* Convenience constructor
|
|
*/
|
|
public static construct(): {
|
|
map: Store<MLMap>
|
|
ui: SvelteUIElement
|
|
mapproperties: MapProperties
|
|
} {
|
|
const mlmap = new UIEventSource<MlMap>(undefined)
|
|
return {
|
|
map: mlmap,
|
|
ui: new SvelteUIElement(MaplibreMap, {
|
|
map: mlmap,
|
|
}),
|
|
mapproperties: new MapLibreAdaptor(mlmap),
|
|
}
|
|
}
|
|
|
|
public static prepareWmsSource(layer: RasterLayerProperties): SourceSpecification {
|
|
return {
|
|
type: "raster",
|
|
// use the tiles option to specify a 256WMS tile source URL
|
|
// https://maplibre.org/maplibre-gl-js-docs/style-spec/sources/
|
|
tiles: [MapLibreAdaptor.prepareWmsURL(layer.url, layer["tile-size"] ?? 256)],
|
|
tileSize: layer["tile-size"] ?? 256,
|
|
minzoom: layer["min_zoom"] ?? 1,
|
|
maxzoom: layer["max_zoom"] ?? 25,
|
|
// scheme: background["type"] === "tms" ? "tms" : "xyz",
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prepares an ELI-URL to be compatible with mapbox
|
|
*/
|
|
private static prepareWmsURL(url: string, size: number = 256): string {
|
|
// ELI: LAYERS=OGWRGB13_15VL&STYLES=&FORMAT=image/jpeg&CRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}&VERSION=1.3.0&SERVICE=WMS&REQUEST=GetMap
|
|
// PROD: SERVICE=WMS&REQUEST=GetMap&LAYERS=OGWRGB13_15VL&STYLES=&FORMAT=image/jpeg&TRANSPARENT=false&VERSION=1.3.0&WIDTH=256&HEIGHT=256&CRS=EPSG:3857&BBOX=488585.4847988467,6590094.830634755,489196.9810251281,6590706.32686104
|
|
|
|
const toReplace = {
|
|
"{bbox}": "{bbox-epsg-3857}",
|
|
"{proj}": "EPSG:3857",
|
|
"{width}": "" + size,
|
|
"{height}": "" + size,
|
|
"{zoom}": "{z}",
|
|
}
|
|
|
|
for (const key in toReplace) {
|
|
url = url.replace(new RegExp(key), toReplace[key])
|
|
}
|
|
|
|
const subdomains = url.match(/\{switch:([a-zA-Z0-9,]*)}/)
|
|
if (subdomains !== null) {
|
|
const options = subdomains[1].split(",")
|
|
const option = options[Math.floor(Math.random() * options.length)]
|
|
url = url.replace(subdomains[0], option)
|
|
}
|
|
|
|
return url
|
|
}
|
|
|
|
public static setDpi(drawOn: HTMLCanvasElement, ctx: CanvasRenderingContext2D, dpiFactor: number) {
|
|
drawOn.style.width = drawOn.style.width || drawOn.width + "px"
|
|
drawOn.style.height = drawOn.style.height || drawOn.height + "px"
|
|
|
|
|
|
// Resize canvas and scale future draws.
|
|
drawOn.width = Math.ceil(drawOn.width * dpiFactor)
|
|
drawOn.height = Math.ceil(drawOn.height * dpiFactor)
|
|
ctx.scale(dpiFactor, dpiFactor)
|
|
console.log("Resizing canvas with setDPI:", drawOn.width, drawOn.height, drawOn.style.width, drawOn.style.height)
|
|
}
|
|
|
|
public async exportAsPng(dpiFactor: number): Promise<Blob> {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return undefined
|
|
}
|
|
const drawOn = document.createElement("canvas")
|
|
drawOn.width = map.getCanvas().width
|
|
drawOn.height = map.getCanvas().height
|
|
|
|
console.log("Canvas size:", drawOn.width, drawOn.height)
|
|
const ctx = drawOn.getContext("2d")
|
|
// Set up CSS size.
|
|
MapLibreAdaptor.setDpi(drawOn, ctx, dpiFactor / map.getPixelRatio())
|
|
|
|
await this.exportBackgroundOnCanvas(ctx)
|
|
|
|
console.log("Getting markers")
|
|
// MapLibreAdaptor.setDpi(drawOn, ctx, 1)
|
|
const markers = await this.drawMarkers(dpiFactor)
|
|
console.log("Drawing markers (" + markers.width + "*" + markers.height + ") onto drawOn (" + drawOn.width + "*" + drawOn.height + ")")
|
|
ctx.drawImage(markers, 0, 0, drawOn.width, drawOn.height)
|
|
ctx.scale(dpiFactor, dpiFactor)
|
|
this._maplibreMap.data?.resize()
|
|
return await new Promise<Blob>(resolve => drawOn.toBlob(blob => resolve(blob)))
|
|
}
|
|
|
|
/**
|
|
* Exports the background map and lines to PNG.
|
|
* Markers are _not_ rendered
|
|
*/
|
|
private async exportBackgroundOnCanvas(ctx: CanvasRenderingContext2D): Promise<void> {
|
|
const map = this._maplibreMap.data
|
|
// We draw the maplibre-map onto the canvas. This does not export markers
|
|
// Inspiration by https://github.com/mapbox/mapbox-gl-js/issues/2766
|
|
|
|
// Total hack - see https://stackoverflow.com/questions/42483449/mapbox-gl-js-export-map-to-png-or-pdf
|
|
const promise = new Promise<void>((resolve) => {
|
|
map.once("render", () => {
|
|
ctx.drawImage(map.getCanvas(), 0, 0)
|
|
resolve()
|
|
})
|
|
})
|
|
|
|
while (!map.isStyleLoaded()) {
|
|
console.log("Waiting to fully load the style...")
|
|
await Utils.waitFor(100)
|
|
}
|
|
map.triggerRepaint()
|
|
await promise
|
|
map.resize()
|
|
}
|
|
|
|
private async drawMarkers(dpiFactor: number): Promise<HTMLCanvasElement> {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return undefined
|
|
}
|
|
const width = map.getCanvas().clientWidth
|
|
const height = map.getCanvas().clientHeight
|
|
console.log("Canvas size markers:", map.getCanvas().width, map.getCanvas().height, "canvasClientRect:", width, height)
|
|
map.getCanvas().style.display = "none"
|
|
const img = await htmltoimage.toCanvas(map.getCanvasContainer(), {
|
|
pixelRatio: dpiFactor,
|
|
canvasWidth: width,
|
|
canvasHeight: height,
|
|
width: width,
|
|
height: height,
|
|
})
|
|
map.getCanvas().style.display = "unset"
|
|
return img
|
|
}
|
|
|
|
private updateStores(isSetup: boolean = false): void {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
if (!isSetup || this.location.data === undefined) {
|
|
const dt = this.location.data
|
|
dt.lon = map.getCenter().lng
|
|
dt.lat = map.getCenter().lat
|
|
this.location.ping()
|
|
}
|
|
this.zoom.setData(Math.round(map.getZoom() * 10) / 10)
|
|
const bounds = map.getBounds()
|
|
const bbox = new BBox([
|
|
[bounds.getEast(), bounds.getNorth()],
|
|
[bounds.getWest(), bounds.getSouth()],
|
|
])
|
|
if (this.bounds.data === undefined || !isSetup) {
|
|
this.bounds.setData(bbox)
|
|
}
|
|
}
|
|
|
|
private SetZoom(z: number): void {
|
|
const map = this._maplibreMap.data
|
|
if (!map || z === undefined) {
|
|
return
|
|
}
|
|
if (Math.abs(map.getZoom() - z) > 0.01) {
|
|
map.setZoom(z)
|
|
}
|
|
}
|
|
|
|
private MoveMapToCurrentLoc(loc: { lat: number; lon: number }): void {
|
|
const map = this._maplibreMap.data
|
|
if (!map || loc === undefined) {
|
|
return
|
|
}
|
|
|
|
const center = map.getCenter()
|
|
if (center.lng !== loc.lon || center.lat !== loc.lat) {
|
|
map.setCenter({lng: loc.lon, lat: loc.lat})
|
|
}
|
|
}
|
|
|
|
private async awaitStyleIsLoaded(): Promise<void> {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
while (!map?.isStyleLoaded()) {
|
|
await Utils.waitFor(250)
|
|
}
|
|
}
|
|
|
|
private removeCurrentLayer(map: MLMap): void {
|
|
if (this._currentRasterLayer) {
|
|
// hide the previous layer
|
|
map.removeLayer(this._currentRasterLayer)
|
|
map.removeSource(this._currentRasterLayer)
|
|
}
|
|
}
|
|
|
|
private async setBackground(): Promise<void> {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
const background: RasterLayerProperties = this.rasterLayer?.data?.properties
|
|
if (background !== undefined && this._currentRasterLayer === background.id) {
|
|
// already the correct background layer, nothing to do
|
|
return
|
|
}
|
|
// await this.awaitStyleIsLoaded()
|
|
|
|
if (background !== this.rasterLayer?.data?.properties) {
|
|
// User selected another background in the meantime... abort
|
|
return
|
|
}
|
|
|
|
if (background !== undefined && this._currentRasterLayer === background.id) {
|
|
// already the correct background layer, nothing to do
|
|
return
|
|
}
|
|
if (!background?.url) {
|
|
// no background to set
|
|
this.removeCurrentLayer(map)
|
|
this._currentRasterLayer = undefined
|
|
return
|
|
}
|
|
|
|
map.addSource(background.id, MapLibreAdaptor.prepareWmsSource(background))
|
|
|
|
map.resize()
|
|
|
|
let addLayerBeforeId = "aeroway_fill"// this is the first non-landuse item in the stylesheet, we add the raster layer before the roads but above the landuse
|
|
if(background.category === "osmbasedmap" || background.category === "map"){
|
|
// The background layer is already an OSM-based map or another map, so we don't want anything from the baselayer
|
|
let layers = map.getStyle().layers
|
|
// THe last index of the maptiler layers
|
|
let lastIndex = layers.findIndex(layer => layer.id === "housenumber")
|
|
addLayerBeforeId = layers[lastIndex + 1]?.id ?? "housenumber"
|
|
}
|
|
|
|
map.addLayer(
|
|
{
|
|
id: background.id,
|
|
type: "raster",
|
|
source: background.id,
|
|
paint: {},
|
|
},addLayerBeforeId
|
|
)
|
|
await this.awaitStyleIsLoaded()
|
|
this.removeCurrentLayer(map)
|
|
this._currentRasterLayer = background?.id
|
|
}
|
|
|
|
private setMaxBounds(bbox: undefined | BBox) {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
if (bbox) {
|
|
map?.setMaxBounds(bbox.toLngLat())
|
|
} else {
|
|
map?.setMaxBounds(null)
|
|
}
|
|
}
|
|
|
|
private setAllowMoving(allow: true | boolean | undefined) {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
if (allow === false) {
|
|
for (const id of MapLibreAdaptor.maplibre_control_handlers) {
|
|
map[id].disable()
|
|
}
|
|
} else {
|
|
for (const id of MapLibreAdaptor.maplibre_control_handlers) {
|
|
map[id].enable()
|
|
}
|
|
}
|
|
}
|
|
|
|
private setMinzoom(minzoom: number) {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
map.setMinZoom(minzoom)
|
|
}
|
|
|
|
private setMaxzoom(maxzoom: number) {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
map.setMaxZoom(maxzoom)
|
|
}
|
|
|
|
private setAllowZooming(allow: true | boolean | undefined) {
|
|
const map = this._maplibreMap.data
|
|
if (!map) {
|
|
return
|
|
}
|
|
if (allow === false) {
|
|
for (const id of MapLibreAdaptor.maplibre_zoom_handlers) {
|
|
map[id].disable()
|
|
}
|
|
} else {
|
|
for (const id of MapLibreAdaptor.maplibre_zoom_handlers) {
|
|
map[id].enable()
|
|
}
|
|
}
|
|
}
|
|
|
|
private setBounds(bounds: BBox) {
|
|
const map = this._maplibreMap.data
|
|
if (!map || bounds === undefined) {
|
|
return
|
|
}
|
|
const oldBounds = map.getBounds()
|
|
const e = 0.0000001
|
|
const hasDiff =
|
|
Math.abs(oldBounds.getWest() - bounds.getWest()) > e &&
|
|
Math.abs(oldBounds.getEast() - bounds.getEast()) > e &&
|
|
Math.abs(oldBounds.getNorth() - bounds.getNorth()) > e &&
|
|
Math.abs(oldBounds.getSouth() - bounds.getSouth()) > e
|
|
if (!hasDiff) {
|
|
return
|
|
}
|
|
map.fitBounds(bounds.toLngLat())
|
|
}
|
|
}
|