forked from MapComplete/MapComplete
91 lines
3 KiB
TypeScript
91 lines
3 KiB
TypeScript
import FeatureSwitchState from "./FeatureSwitchState"
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import { ElementStorage } from "../ElementStorage"
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import { Changes } from "../Osm/Changes"
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import LayoutConfig from "../../Models/ThemeConfig/LayoutConfig"
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import { UIEventSource } from "../UIEventSource"
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import Loc from "../../Models/Loc"
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import { BBox } from "../BBox"
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import { QueryParameters } from "../Web/QueryParameters"
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import { LocalStorageSource } from "../Web/LocalStorageSource"
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import { Utils } from "../../Utils"
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import ChangeToElementsActor from "../Actors/ChangeToElementsActor"
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import PendingChangesUploader from "../Actors/PendingChangesUploader"
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/**
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* The part of the state keeping track of where the elements, loading them, configuring the feature pipeline etc
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*/
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export default class ElementsState extends FeatureSwitchState {
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/**
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The mapping from id -> UIEventSource<properties>
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*/
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public allElements: ElementStorage = new ElementStorage()
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/**
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The latest element that was selected
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*/
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public readonly selectedElement = new UIEventSource<any>(undefined, "Selected element")
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/**
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* The map location: currently centered lat, lon and zoom
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*/
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public readonly locationControl = new UIEventSource<Loc>(undefined, "locationControl")
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/**
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* The current visible extent of the screen
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*/
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public readonly currentBounds = new UIEventSource<BBox>(undefined)
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constructor(layoutToUse: LayoutConfig) {
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super(layoutToUse)
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function localStorageSynced(
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key: string,
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deflt: number,
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docs: string
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): UIEventSource<number> {
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const localStorage = LocalStorageSource.Get(key)
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const previousValue = localStorage.data
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const src = UIEventSource.asFloat(
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QueryParameters.GetQueryParameter(key, "" + deflt, docs).syncWith(localStorage)
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)
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if (src.data === deflt) {
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const prev = Number(previousValue)
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if (!isNaN(prev)) {
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src.setData(prev)
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}
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}
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return src
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}
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// -- Location control initialization
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const zoom = localStorageSynced(
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"z",
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layoutToUse?.startZoom ?? 1,
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"The initial/current zoom level"
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)
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const lat = localStorageSynced(
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"lat",
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layoutToUse?.startLat ?? 0,
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"The initial/current latitude"
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)
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const lon = localStorageSynced(
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"lon",
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layoutToUse?.startLon ?? 0,
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"The initial/current longitude of the app"
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)
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this.locationControl.setData({
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zoom: Utils.asFloat(zoom.data),
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lat: Utils.asFloat(lat.data),
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lon: Utils.asFloat(lon.data),
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})
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this.locationControl.addCallback((latlonz) => {
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// Sync the location controls
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zoom.setData(latlonz.zoom)
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lat.setData(latlonz.lat)
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lon.setData(latlonz.lon)
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})
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}
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}
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