Refactoring: split 'ThemeViewState' into many classes

scripts/handleErrors.ts

@@ -1,11 +1,10 @@
 import Script from "./Script"
-import { appendFileSync, readFileSync, writeFile, writeFileSync } from "fs"
+import { readFileSync, writeFileSync } from "fs"
 import { ChangeDescription } from "../src/Logic/Osm/Actions/ChangeDescription"
 import { Changes } from "../src/Logic/Osm/Changes"
 import { OsmObject } from "../src/Logic/Osm/OsmObject"
 import OsmObjectDownloader from "../src/Logic/Osm/OsmObjectDownloader"
 import { OsmConnection } from "../src/Logic/Osm/OsmConnection"
-import { ImmutableStore } from "../src/Logic/UIEventSource"
 import Constants from "../src/Models/Constants"
 
 type ErrorMessage = {
@@ -130,11 +129,10 @@ ${changeset}`
 
         const changesObj = new Changes(
             {
-                dryRun: new ImmutableStore(true),
                 osmConnection,
+                reportError: (err) => console.error(err)
             },
             false,
-            (err) => console.error(err)
         )
 
         const all: ErrorMessage[] = []

src/Logic/Actors/GeoLocationHandler.ts

@@ -2,18 +2,17 @@ import { QueryParameters } from "../Web/QueryParameters"
 import { BBox } from "../BBox"
 import Constants from "../../Models/Constants"
 import { GeoLocationState } from "../State/GeoLocationState"
-import { UIEventSource } from "../UIEventSource"
+import { Store, UIEventSource } from "../UIEventSource"
 import { Feature, LineString, Point } from "geojson"
 import { FeatureSource, WritableFeatureSource } from "../FeatureSource/FeatureSource"
 import { LocalStorageSource } from "../Web/LocalStorageSource"
 import { GeoOperations } from "../GeoOperations"
 import { OsmTags } from "../../Models/OsmFeature"
-import StaticFeatureSource, {
+import StaticFeatureSource, { WritableStaticFeatureSource } from "../FeatureSource/Sources/StaticFeatureSource"
-    WritableStaticFeatureSource,
-} from "../FeatureSource/Sources/StaticFeatureSource"
 import { MapProperties } from "../../Models/MapProperties"
 import { Orientation } from "../../Sensors/Orientation"
-;("use strict")
+
+("use strict")
 /**
  * The geolocation-handler takes a map-location and a geolocation state.
  * It'll move the map as appropriate given the state of the geolocation-API
@@ -45,14 +44,14 @@ export default class GeoLocationHandler {
     public readonly mapHasMoved: UIEventSource<Date | undefined> = new UIEventSource<
         Date | undefined
     >(undefined)
-    private readonly selectedElement: UIEventSource<Feature>
+    private readonly selectedElement: Store<object>
-    private readonly mapProperties?: MapProperties
+    private readonly mapProperties: MapProperties
     private readonly gpsLocationHistoryRetentionTime?: UIEventSource<number>
 
     constructor(
         geolocationState: GeoLocationState,
-        selectedElement: UIEventSource<Feature>,
+        selectedElement: Store<object>,
-        mapProperties?: MapProperties,
+        mapProperties: MapProperties,
         gpsLocationHistoryRetentionTime?: UIEventSource<number>
     ) {
         this.geolocationState = geolocationState
@@ -62,7 +61,7 @@ export default class GeoLocationHandler {
         this.gpsLocationHistoryRetentionTime = gpsLocationHistoryRetentionTime
         // Did an interaction move the map?
         const initTime = new Date()
-        mapLocation.addCallbackD(() => {
+        mapLocation?.addCallbackD(() => {
             if (new Date().getTime() - initTime.getTime() < 250) {
                 return
             }
@@ -139,7 +138,7 @@ export default class GeoLocationHandler {
             }
         }
 
-        mapLocation.setData({
+        mapLocation?.setData({
             lon: newLocation.longitude,
             lat: newLocation.latitude,
         })

src/Logic/Actors/NoElementsInViewDetector.ts

@@ -1,7 +1,7 @@
 import { BBox } from "../BBox"
 import { Store } from "../UIEventSource"
-import ThemeViewState from "../../Models/ThemeViewState"
 import Constants from "../../Models/Constants"
+import { WithChangesState } from "../../Models/ThemeViewState/WithChangesState"
 
 export type FeatureViewState =
     | "no-data"
@@ -11,7 +11,7 @@ export type FeatureViewState =
 export default class NoElementsInViewDetector {
     public readonly hasFeatureInView: Store<FeatureViewState>
 
-    constructor(themeViewState: ThemeViewState) {
+    constructor(themeViewState: WithChangesState) {
         const state = themeViewState
         const minZoom = Math.min(
             ...themeViewState.theme.layers
@@ -32,7 +32,6 @@ export default class NoElementsInViewDetector {
                     return "zoom-to-low"
                 }
 
-                let minzoomWithData = 9999
 
                 for (const [layerName, source] of themeViewState.perLayerFiltered) {
                     if (priviliged.has(layerName)) {
@@ -45,7 +44,6 @@ export default class NoElementsInViewDetector {
                     }
                     const layer = themeViewState.theme.getLayer(layerName)
                     if (mapProperties.zoom.data < layer.minzoom) {
-                        minzoomWithData = Math.min(layer.minzoom)
                         continue
                     }
                     if (!state.layerState.filteredLayers.get(layerName).isDisplayed.data) {

src/Logic/Actors/SelectedElementTagsUpdater.ts

@@ -4,10 +4,12 @@
 import SimpleMetaTagger from "../SimpleMetaTagger"
 import { OsmTags } from "../../Models/OsmFeature"
 import { Utils } from "../../Utils"
-import ThemeViewState from "../../Models/ThemeViewState"
 import { BBox } from "../BBox"
 import { Feature } from "geojson"
-import { SpecialVisualizationState } from "../../UI/SpecialVisualization"
+import { Changes } from "../Osm/Changes"
+import ThemeConfig from "../../Models/ThemeConfig/ThemeConfig"
+import FeaturePropertiesStore from "../FeatureSource/Actors/FeaturePropertiesStore"
+import { WithChangesState } from "../../Models/ThemeViewState/WithChangesState"
 
 export default class SelectedElementTagsUpdater {
     private static readonly metatags = new Set([
@@ -18,9 +20,9 @@ export default class SelectedElementTagsUpdater {
         "uid",
         "id",
     ])
-    private readonly state: ThemeViewState
+    private readonly state: WithChangesState
 
-    constructor(state: ThemeViewState) {
+    constructor(state: WithChangesState) {
         this.state = state
         state.osmConnection.isLoggedIn.addCallbackAndRun((isLoggedIn) => {
             if (!isLoggedIn && !Utils.runningFromConsole) {
@@ -32,7 +34,11 @@ export default class SelectedElementTagsUpdater {
         })
     }
 
-    public static applyUpdate(latestTags: OsmTags, id: string, state: SpecialVisualizationState) {
+    public static applyUpdate(latestTags: OsmTags, id: string, state: {
+        theme: ThemeConfig,
+        changes: Changes,
+        featureProperties: FeaturePropertiesStore
+    }) {
         try {
             const leftRightSensitive = state.theme.isLeftRightSensitive()
 

src/Logic/FeatureSource/Sources/FavouritesFeatureSource.ts

@@ -6,8 +6,11 @@ import { OsmId } from "../../../Models/OsmFeature"
 import { GeoOperations } from "../../GeoOperations"
 import { IndexedFeatureSource } from "../FeatureSource"
 import OsmObjectDownloader from "../../Osm/OsmObjectDownloader"
-import { SpecialVisualizationState } from "../../../UI/SpecialVisualization"
 import SelectedElementTagsUpdater from "../../Actors/SelectedElementTagsUpdater"
+import FeaturePropertiesStore from "../Actors/FeaturePropertiesStore"
+import ThemeConfig from "../../../Models/ThemeConfig/ThemeConfig"
+import { Changes } from "../../Osm/Changes"
+import { WithChangesState } from "../../../Models/ThemeViewState/WithChangesState"
 
 /**
  * Generates the favourites from the preferences and marks them as favourite
@@ -22,7 +25,7 @@ export default class FavouritesFeatureSource extends StaticFeatureSource {
      */
     public readonly allFavourites: Store<Feature[]>
 
-    constructor(state: SpecialVisualizationState) {
+    constructor(state: WithChangesState) {
         const features: Store<Feature[]> = Stores.ListStabilized(
             state.osmConnection.preferencesHandler.allPreferences.map((prefs) => {
                 const feats: Feature[] = []
@@ -71,7 +74,7 @@ export default class FavouritesFeatureSource extends StaticFeatureSource {
 
         this.allFavourites.addCallbackD((features) => {
             for (const feature of features) {
-                this.updateFeature(feature, state.osmObjectDownloader, state)
+                this.updateFeature(feature, state)
             }
 
             return true
@@ -80,11 +83,15 @@ export default class FavouritesFeatureSource extends StaticFeatureSource {
 
     private async updateFeature(
         feature: Feature,
-        osmObjectDownloader: OsmObjectDownloader,
+        state: {
-        state: SpecialVisualizationState
+            theme: ThemeConfig,
+            changes: Changes,
+            featureProperties: FeaturePropertiesStore,
+            osmObjectDownloader: OsmObjectDownloader,
+        }
     ) {
         const id = feature.properties.id
-        const upstream = await osmObjectDownloader.DownloadObjectAsync(id)
+        const upstream = await state.osmObjectDownloader.DownloadObjectAsync(id)
         if (upstream === "deleted") {
             this.removeFavourite(feature)
             return

src/Logic/Osm/Changes.ts

@@ -46,7 +46,7 @@ export class Changes {
 
     constructor(
         state: {
-            featureSwitches: {
+            featureSwitches?: {
                 featureSwitchMorePrivacy?: Store<boolean>
                 featureSwitchIsTesting?: Store<boolean>
             }
@@ -56,8 +56,7 @@ export class Changes {
             historicalUserLocations?: FeatureSource
             allElements?: IndexedFeatureSource
         },
-        leftRightSensitive: boolean = false,
+        leftRightSensitive: boolean = false
-        reportError?: (string: string | Error, extramessage?: string) => void
     ) {
         this._leftRightSensitive = leftRightSensitive
         // We keep track of all changes just as well
@@ -73,7 +72,7 @@ export class Changes {
         }
         this.state = state
         this.backend = state.osmConnection.Backend()
-        this._reportError = reportError
+        this._reportError = state.reportError
         this._changesetHandler = new ChangesetHandler(
             state.featureSwitches?.featureSwitchIsTesting ?? new ImmutableStore(false),
             state.osmConnection,

src/Logic/Search/OpenStreetMapIdSearch.ts

@@ -1,8 +1,8 @@
 import { Store, UIEventSource } from "../UIEventSource"
-import GeocodingProvider, { GeocodingOptions, GeocodeResult } from "./GeocodingProvider"
+import GeocodingProvider, { GeocodeResult, GeocodingOptions } from "./GeocodingProvider"
 import { OsmId } from "../../Models/OsmFeature"
-import { SpecialVisualizationState } from "../../UI/SpecialVisualization"
 import { Utils } from "../../Utils"
+import OsmObjectDownloader from "../Osm/OsmObjectDownloader"
 
 export default class OpenStreetMapIdSearch implements GeocodingProvider {
     private static readonly regex =
@@ -13,11 +13,11 @@ export default class OpenStreetMapIdSearch implements GeocodingProvider {
         w: "way",
         r: "relation",
     }
+    private readonly _osmObjectDownloader: OsmObjectDownloader
 
-    private readonly _state: SpecialVisualizationState
 
-    constructor(state: SpecialVisualizationState) {
+    constructor(osmObjectDownloader: OsmObjectDownloader) {
-        this._state = state
+        this._osmObjectDownloader = osmObjectDownloader
     }
 
     /**
@@ -49,7 +49,7 @@ export default class OpenStreetMapIdSearch implements GeocodingProvider {
 
     private async getInfoAbout(id: OsmId): Promise<GeocodeResult> {
         const [osm_type, osm_id] = id.split("/")
-        const obj = await this._state.osmObjectDownloader.DownloadObjectAsync(id)
+        const obj = await this._osmObjectDownloader.DownloadObjectAsync(id)
         if (obj === "deleted") {
             return {
                 display_name: id + " was deleted",
@@ -74,13 +74,13 @@ export default class OpenStreetMapIdSearch implements GeocodingProvider {
         }
     }
 
-    async search(query: string, options?: GeocodingOptions): Promise<GeocodeResult[]> {
+    async search(query: string, _: GeocodingOptions): Promise<GeocodeResult[]> {
         if (!isNaN(Number(query))) {
             const n = Number(query)
             return Utils.NoNullInplace(
                 await Promise.all([
-                    this.getInfoAbout(`node/${n}`).catch((x) => undefined),
+                    this.getInfoAbout(`node/${n}`).catch(() => undefined),
-                    this.getInfoAbout(`way/${n}`).catch((x) => undefined),
+                    this.getInfoAbout(`way/${n}`).catch(() => undefined),
                     this.getInfoAbout(`relation/${n}`).catch(() => undefined),
                 ])
             )

src/Logic/State/SearchState.ts

@@ -39,9 +39,9 @@ export default class SearchState {
             new LocalElementSearch(state, 5),
             new CoordinateSearch(),
             new OpenLocationCodeSearch(),
-            new OpenStreetMapIdSearch(state),
+            new OpenStreetMapIdSearch(state.osmObjectDownloader),
             new PhotonSearch(true, 2),
-            new PhotonSearch(),
+            new PhotonSearch()
             // new NominatimGeocoding(),
         ]
 
@@ -122,7 +122,7 @@ export default class SearchState {
 
         const layersToShow = payload.map((fsr) => fsr.layer.id)
         console.log("Layers to show are", layersToShow)
-        for (const [name, otherLayer] of state.layerState.filteredLayers) {
+        for (const otherLayer of state.layerState.filteredLayers.values()) {
             const layer = otherLayer.layerDef
             if (!layer.isNormal()) {
                 continue

src/Logic/State/UserRelatedState.ts

@@ -17,7 +17,6 @@ import FeatureSwitchState from "./FeatureSwitchState"
 import Constants from "../../Models/Constants"
 import { QueryParameters } from "../Web/QueryParameters"
 import { ThemeMetaTagging } from "./UserSettingsMetaTagging"
-import { MapProperties } from "../../Models/MapProperties"
 import Showdown from "showdown"
 import { LocalStorageSource } from "../Web/LocalStorageSource"
 import { GeocodeResult } from "../Search/GeocodingProvider"
@@ -53,7 +52,7 @@ export class OptionallySyncedHistory<T> {
         ))
         this.syncPreference.addCallback((syncmode) => {
             if (syncmode === "sync") {
-                let list = [...thisSession.data, ...synced.data].slice(0, maxHistory)
+                const list = [...thisSession.data, ...synced.data].slice(0, maxHistory)
                 if (this._isSame) {
                     for (let i = 0; i < list.length; i++) {
                         for (let j = i + 1; j < list.length; j++) {
@@ -178,7 +177,6 @@ export default class UserRelatedState {
      * Note: these are linked via OsmConnection.preferences which exports all preferences as UIEventSource
      */
     public readonly preferencesAsTags: UIEventSource<Record<string, string>>
-    private readonly _mapProperties: MapProperties
 
     public readonly recentlyVisitedThemes: OptionallySyncedHistory<string>
     public readonly recentlyVisitedSearch: OptionallySyncedHistory<GeocodeResult>
@@ -187,10 +185,9 @@ export default class UserRelatedState {
         osmConnection: OsmConnection,
         layout?: ThemeConfig,
         featureSwitches?: FeatureSwitchState,
-        mapProperties?: MapProperties
+        currentRasterLayer?: Store<{ properties: { id: string } }>
     ) {
         this.osmConnection = osmConnection
-        this._mapProperties = mapProperties
 
         this.showAllQuestionsAtOnce = UIEventSource.asBoolean(
             this.osmConnection.getPreference("show-all-questions", "false")
@@ -224,7 +221,7 @@ export default class UserRelatedState {
         this.translationMode = this.initTranslationMode()
         this.homeLocation = this.initHomeLocation()
 
-        this.preferencesAsTags = this.initAmendedPrefs(layout, featureSwitches)
+        this.preferencesAsTags = this.initAmendedPrefs(layout, featureSwitches, currentRasterLayer)
 
         this.recentlyVisitedThemes = new OptionallySyncedHistory<string>(
             "theme",
@@ -405,7 +402,8 @@ export default class UserRelatedState {
      * */
     private initAmendedPrefs(
         layout?: ThemeConfig,
-        featureSwitches?: FeatureSwitchState
+        featureSwitches?: FeatureSwitchState,
+        currentRasterLayer?: Store<{ properties: { id: string } }>
     ): UIEventSource<Record<string, string>> {
         const amendedPrefs = new UIEventSource<Record<string, string>>({
             _theme: layout?.id,
@@ -541,7 +539,7 @@ export default class UserRelatedState {
                 if (tags[key] === null) {
                     continue
                 }
-                let pref = this.osmConnection.GetPreference(key, undefined, { prefix: "" })
+                const pref = this.osmConnection.GetPreference(key, undefined, { prefix: "" })
 
                 pref.set(tags[key])
             }
@@ -560,7 +558,7 @@ export default class UserRelatedState {
             }
         }
 
-        this._mapProperties?.rasterLayer?.addCallbackAndRun((l) => {
+        currentRasterLayer?.addCallbackAndRun((l) => {
             amendedPrefs.data["__current_background"] = l?.properties?.id
             amendedPrefs.ping()
         })

src/Logic/Web/ThemeViewStateHashActor.ts

@@ -1,9 +1,16 @@
-import ThemeViewState from "../../Models/ThemeViewState"
 import Hash from "./Hash"
 import { MenuState } from "../../Models/MenuState"
+import { IndexedFeatureSource } from "../FeatureSource/FeatureSource"
+import { Feature } from "geojson"
+import { UIEventSource } from "../UIEventSource"
 
 export default class ThemeViewStateHashActor {
-    private readonly _state: ThemeViewState
+    private readonly _state: {
+        indexedFeatures: IndexedFeatureSource,
+        selectedElement: UIEventSource<Feature>,
+        guistate: MenuState,
+        previewedImage: UIEventSource<object>
+    }
     private isUpdatingHash = false
 
     public static readonly documentation = [
@@ -16,7 +23,7 @@ export default class ThemeViewStateHashActor {
         "",
         "The possible hashes are:",
         "",
-        MenuState.pageNames.map((tab) => "`" + tab + "`").join(","),
+        MenuState.pageNames.map((tab) => "`" + tab + "`").join(",")
     ]
 
     /**
@@ -28,7 +35,12 @@ export default class ThemeViewStateHashActor {
      * As such, we use a change in the hash to close the appropriate windows
      *
      */
-    constructor(state: ThemeViewState) {
+    constructor(state: {
+        indexedFeatures: IndexedFeatureSource,
+        selectedElement: UIEventSource<Feature>,
+        guistate: MenuState,
+        previewedImage: UIEventSource<object>
+    }) {
         this._state = state
 
         const hashOnLoad = Hash.hash.data

src/Models/ThemeViewState/UserMapFeatureswitchState.ts

@@ -0,0 +1,292 @@
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { Store, UIEventSource } from "../../Logic/UIEventSource"
+import { Map as MlMap } from "maplibre-gl"
+import { GeoLocationState } from "../../Logic/State/GeoLocationState"
+import InitialMapPositioning from "../../Logic/Actors/InitialMapPositioning"
+import { MapLibreAdaptor } from "../../UI/Map/MapLibreAdaptor"
+import { ExportableMap, MapProperties } from "../MapProperties"
+import { LastClickFeatureSource } from "../../Logic/FeatureSource/Sources/LastClickFeatureSource"
+import { PreferredRasterLayerSelector } from "../../Logic/Actors/PreferredRasterLayerSelector"
+import { AvailableRasterLayers, RasterLayerPolygon, RasterLayerUtils } from "../RasterLayers"
+import BackgroundLayerResetter from "../../Logic/Actors/BackgroundLayerResetter"
+import Hotkeys from "../../UI/Base/Hotkeys"
+import Translations from "../../UI/i18n/Translations"
+import { EliCategory } from "../RasterLayerProperties"
+import StaticFeatureSource from "../../Logic/FeatureSource/Sources/StaticFeatureSource"
+import { Feature, Point, Polygon } from "geojson"
+import { FeatureSource, WritableFeatureSource } from "../../Logic/FeatureSource/FeatureSource"
+import FullNodeDatabaseSource from "../../Logic/FeatureSource/TiledFeatureSource/FullNodeDatabaseSource"
+import { WithUserRelatedState } from "./WithUserRelatedState"
+import GeoLocationHandler from "../../Logic/Actors/GeoLocationHandler"
+import { GeolocationControlState } from "../../UI/BigComponents/GeolocationControl"
+import ShowOverlayRasterLayer from "../../UI/Map/ShowOverlayRasterLayer"
+import { BBox } from "../../Logic/BBox"
+import ShowDataLayer from "../../UI/Map/ShowDataLayer"
+
+/**
+ * The first core of the state management; everything related to:
+ * - the OSM connection
+ * - setting up the basemap
+ * - the feature switches
+ * - the GPS-location
+ *
+ * Anything that handles editable elements is _not_ done on this level.
+ * Anything that handles the UI is not done on this level
+ */
+
+export class UserMapFeatureswitchState extends WithUserRelatedState {
+
+    readonly map: UIEventSource<MlMap>
+
+
+    readonly mapProperties: MapLibreAdaptor & MapProperties & ExportableMap
+    readonly lastClickObject: LastClickFeatureSource
+
+    readonly geolocationState: GeoLocationState
+    readonly geolocation: GeoLocationHandler
+    readonly geolocationControl: GeolocationControlState
+    readonly historicalUserLocations: WritableFeatureSource<Feature<Point>>
+
+
+    readonly availableLayers: { store: Store<RasterLayerPolygon[]> }
+    readonly currentView: FeatureSource<Feature<Polygon>>
+    readonly fullNodeDatabase?: FullNodeDatabaseSource
+
+
+    constructor(theme: ThemeConfig, selectedElement: Store<object>) {
+        const rasterLayer: UIEventSource<RasterLayerPolygon> = new UIEventSource<RasterLayerPolygon>(undefined)
+        super(theme, rasterLayer)
+        this.geolocationState = new GeoLocationState()
+        const initial = new InitialMapPositioning(theme, this.geolocationState, this.osmConnection)
+        this.map = new UIEventSource<MlMap>(undefined)
+        this.mapProperties = new MapLibreAdaptor(this.map, { rasterLayer, ...initial }, { correctClick: 20 })
+
+        this.geolocation = new GeoLocationHandler(
+            this.geolocationState,
+            selectedElement,
+            this.mapProperties,
+            this.userRelatedState.gpsLocationHistoryRetentionTime
+        )
+        this.geolocationControl = new GeolocationControlState(this.geolocation, this.mapProperties)
+        this.historicalUserLocations = this.geolocation.historicalUserLocations
+
+
+        this.userRelatedState.fixateNorth.addCallbackAndRunD((fixated) => {
+            this.mapProperties.allowRotating.setData(fixated !== "yes")
+        })
+
+        this.availableLayers = AvailableRasterLayers.layersAvailableAt(
+            this.mapProperties.location,
+            this.osmConnection.isLoggedIn
+        )
+
+        this.userRelatedState.markLayoutAsVisited(this.theme)
+
+        this.lastClickObject = new LastClickFeatureSource(
+            this.theme,
+            this.mapProperties.lastClickLocation,
+            this.userRelatedState.addNewFeatureMode
+        )
+        {
+            let currentViewIndex = 0
+            const empty = []
+            this.currentView = new StaticFeatureSource(
+                this.mapProperties.bounds.map((bbox) => {
+                    if (!bbox) {
+                        return empty
+                    }
+                    currentViewIndex++
+                    return <Feature[]>[
+                        bbox.asGeoJson({
+                            zoom: this.mapProperties.zoom.data,
+                            ...this.mapProperties.location.data,
+                            id: "current_view_" + currentViewIndex
+                        })
+                    ]
+                })
+            )
+        }
+
+        if (this.theme.layers.some((l) => l._needsFullNodeDatabase)) {
+            this.fullNodeDatabase = new FullNodeDatabaseSource()
+        }
+
+
+        ///////// Actors ///////////////
+
+        new BackgroundLayerResetter(this.mapProperties.rasterLayer, this.availableLayers)
+
+
+        this.userRelatedState.showScale.addCallbackAndRun((showScale) => {
+            this.mapProperties.showScale.set(showScale)
+        })
+        new PreferredRasterLayerSelector(
+            this.mapProperties.rasterLayer,
+            this.availableLayers,
+            this.featureSwitches.backgroundLayerId,
+            this.userRelatedState.preferredBackgroundLayer
+        )
+
+
+        this.initHotkeys()
+        this.drawOverlayLayers()
+        this.drawLock()
+
+    }
+
+
+    /**
+     * If the map is locked to a certain area _and_ we are in test mode, draw this on the map
+     * @private
+     */
+    private drawLock() {
+        if (!this.theme?.lockLocation) {
+            return
+        }
+        const bbox = new BBox(<[[number, number], [number, number]]>this.theme.lockLocation)
+        this.mapProperties.maxbounds.setData(bbox)
+        ShowDataLayer.showRange(
+            this.map,
+            new StaticFeatureSource([bbox.asGeoJson({ id: "range" })]),
+            this.featureSwitches.featureSwitchIsTesting
+        )
+    }
+
+    private drawOverlayLayers() {
+        for (const rasterInfo of this.theme.tileLayerSources) {
+            const state = this.overlayLayerStates.get(rasterInfo.id)
+            new ShowOverlayRasterLayer(rasterInfo, this.map, this.mapProperties, state)
+        }
+    }
+
+
+    /* By focussing on the map, the keyboard panning and zoom with '+' and '+' works */
+    public focusOnMap() {
+        if (this.map.data) {
+            this.map.data.getCanvas().focus()
+            return
+        }
+        this.map.addCallbackAndRunD((map) => {
+            map.on("load", () => {
+                map.getCanvas().focus()
+            })
+            return true
+        })
+    }
+
+    private initHotkeys() {
+        const docs = Translations.t.hotkeyDocumentation
+
+        this.featureSwitches.featureSwitchBackgroundSelection.addCallbackAndRun((enable) => {
+            if (!enable) {
+                return
+            }
+
+            const setLayerCategory = (category: EliCategory, skipLayers: number = 0) => {
+                const timeOfCall = new Date()
+                this.availableLayers.store.addCallbackAndRunD((available) => {
+                    const now = new Date()
+                    const timeDiff = (now.getTime() - timeOfCall.getTime()) / 1000
+                    if (timeDiff > 3) {
+                        return true // unregister
+                    }
+                    const current = this.mapProperties.rasterLayer
+                    const best = RasterLayerUtils.SelectBestLayerAccordingTo(
+                        available,
+                        category,
+                        current.data,
+                        skipLayers
+                    )
+                    if (!best) {
+                        return
+                    }
+                    console.log("Best layer for category", category, "is", best?.properties?.id)
+                    current.setData(best)
+                })
+            }
+
+            Hotkeys.RegisterHotkey(
+                { nomod: "O" },
+                docs.selectOsmbasedmap,
+                () => setLayerCategory("osmbasedmap")
+            )
+
+            Hotkeys.RegisterHotkey(
+                { nomod: "M" },
+                docs.selectMap,
+                () => setLayerCategory("map")
+            )
+
+            Hotkeys.RegisterHotkey(
+                { nomod: "P" },
+                docs.selectAerial,
+                () => setLayerCategory("photo")
+            )
+            Hotkeys.RegisterHotkey(
+                { shift: "O" },
+                docs.selectOsmbasedmap,
+                () => setLayerCategory("osmbasedmap", 2)
+            )
+
+            Hotkeys.RegisterHotkey(
+                { shift: "M" },
+                docs.selectMap,
+                () => setLayerCategory("map", 2)
+            )
+
+            Hotkeys.RegisterHotkey(
+                { shift: "P" },
+                docs.selectAerial,
+                () => setLayerCategory("photo", 2)
+            )
+
+            return true
+        })
+
+        Hotkeys.RegisterHotkey(
+            { nomod: "L" },
+            Translations.t.hotkeyDocumentation.geolocate,
+            () => {
+                this.geolocationControl.handleClick()
+            }
+        )
+
+        Hotkeys.RegisterHotkey(
+            {
+                shift: "T"
+            },
+            docs.translationMode,
+            () => {
+                const tm = this.userRelatedState.translationMode
+                if (tm.data === "false") {
+                    tm.setData("true")
+                } else {
+                    tm.setData("false")
+                }
+            }
+        )
+    }
+
+    /**
+     * Shows the current GPS-location marker on the given map.
+     * This is used to show the location on _other_ maps, e.g. on the map to add a new feature.
+     *
+     * This is _NOT_ to be used on the main map!
+     */
+    public showCurrentLocationOn(map: Store<MlMap>) {
+        const id = "gps_location"
+        const layer = this.theme.getLayer(id)
+        if (layer === undefined) {
+            return
+        }
+        if (map === this.map) {
+            throw "Invalid use of showCurrentLocationOn"
+        }
+        const features = this.geolocation.currentUserLocation
+        return new ShowDataLayer(map, {
+            features,
+            layer,
+            metaTags: this.userRelatedState.preferencesAsTags
+        })
+    }
+}

src/Models/ThemeViewState/WithChangesState.ts

@@ -0,0 +1,236 @@
+import { Changes } from "../../Logic/Osm/Changes"
+import {
+    NewGeometryFromChangesFeatureSource
+} from "../../Logic/FeatureSource/Sources/NewGeometryFromChangesFeatureSource"
+import { WithLayoutSourceState } from "./WithLayoutSourceState"
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { Utils } from "../../Utils"
+import Constants from "../Constants"
+import { WritableFeatureSource } from "../../Logic/FeatureSource/FeatureSource"
+import OsmObjectDownloader from "../../Logic/Osm/OsmObjectDownloader"
+import ChangeToElementsActor from "../../Logic/Actors/ChangeToElementsActor"
+import MetaTagging from "../../Logic/MetaTagging"
+import { GeoIndexedStoreForLayer } from "../../Logic/FeatureSource/Actors/GeoIndexedStore"
+import SaveFeatureSourceToLocalStorage from "../../Logic/FeatureSource/Actors/SaveFeatureSourceToLocalStorage"
+import ThemeSource from "../../Logic/FeatureSource/Sources/ThemeSource"
+import PerLayerFeatureSourceSplitter from "../../Logic/FeatureSource/PerLayerFeatureSourceSplitter"
+import ChangeGeometryApplicator from "../../Logic/FeatureSource/Sources/ChangeGeometryApplicator"
+import { Store } from "../../Logic/UIEventSource"
+import { Map as MlMap } from "maplibre-gl"
+import FilteringFeatureSource from "../../Logic/FeatureSource/Sources/FilteringFeatureSource"
+import ShowDataLayer from "../../UI/Map/ShowDataLayer"
+import SelectedElementTagsUpdater from "../../Logic/Actors/SelectedElementTagsUpdater"
+import NoElementsInViewDetector, { FeatureViewState } from "../../Logic/Actors/NoElementsInViewDetector"
+
+export class WithChangesState extends WithLayoutSourceState {
+
+    readonly changes: Changes
+    readonly newFeatures: WritableFeatureSource
+    readonly osmObjectDownloader: OsmObjectDownloader
+    readonly perLayer: ReadonlyMap<string, GeoIndexedStoreForLayer>
+    readonly perLayerFiltered: ReadonlyMap<string, FilteringFeatureSource>
+    readonly toCacheSavers: ReadonlyMap<string, SaveFeatureSourceToLocalStorage>
+    /**
+     * Indicates if there is _some_ data in view, even if it is not shown due to the filters
+     */
+    readonly hasDataInView: Store<FeatureViewState>
+
+    constructor(theme: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(theme, mvtAvailableLayers)
+        this.changes = new Changes(
+            {
+                featureSwitches: this.featureSwitches,
+                allElements: this.indexedFeatures,
+                osmConnection: this.osmConnection,
+                featureProperties: this.featureProperties,
+                historicalUserLocations: this.historicalUserLocations,
+                reportError: this.reportError
+            },
+            theme?.isLeftRightSensitive() ?? false
+        )
+        this.newFeatures = new NewGeometryFromChangesFeatureSource(
+            this.changes,
+            this.indexedFeatures,
+            this.featureProperties
+        )
+        this.indexedFeatures.addSource(this.newFeatures)
+
+        this.osmObjectDownloader = new OsmObjectDownloader(
+            this.osmConnection.Backend(),
+            this.changes
+        )
+
+        const perLayer = new PerLayerFeatureSourceSplitter(
+            Array.from(this.layerState.filteredLayers.values()).filter(
+                (l) => l.layerDef?.source !== null
+            ),
+            new ChangeGeometryApplicator(this.indexedFeatures, this.changes),
+            {
+                constructStore: (features, layer) =>
+                    new GeoIndexedStoreForLayer(features, layer),
+                handleLeftovers: (features) => {
+                    console.warn(
+                        "Got ",
+                        features.length,
+                        "leftover features, such as",
+                        features[0].properties
+                    )
+                }
+            }
+        )
+        this.perLayer = perLayer.perLayer
+        this.perLayerFiltered = this.showNormalDataOn(this.map)
+
+        this.hasDataInView = new NoElementsInViewDetector(this).hasFeatureInView
+        
+        this.toCacheSavers = theme.enableCache ? this.initSaveToLocalStorage() : undefined
+
+
+        ////// ACTORS ////////
+
+        new ChangeToElementsActor(this.changes, this.featureProperties)
+        new SelectedElementTagsUpdater(this)
+
+        new MetaTagging({
+            theme: this.theme,
+            selectedElement: this.selectedElement,
+            featureProperties: this.featureProperties,
+            indexedFeatures: this.indexedFeatures,
+            osmObjectDownloader: this.osmObjectDownloader,
+            perLayer: this.perLayer
+        })
+    }
+
+    public async reportError(message: string | Error | XMLHttpRequest, extramessage: string = "") {
+        if (Utils.runningFromConsole) {
+            console.error("Got (in themeViewSTate.reportError):", message, extramessage)
+            return
+        }
+        const isTesting = this.featureSwitchIsTesting?.data
+        console.log(
+            isTesting
+                ? ">>> _Not_ reporting error to report server as testmode is on"
+                : ">>> Reporting error to",
+            Constants.ErrorReportServer,
+            message
+        )
+        if (isTesting) {
+            return
+        }
+
+        if ("" + message === "[object XMLHttpRequest]") {
+            const req = <XMLHttpRequest>message
+            let body = ""
+            try {
+                body = req.responseText
+            } catch (e) {
+                // pass
+            }
+            message =
+                "XMLHttpRequest with status code " +
+                req.status +
+                ", " +
+                req.statusText +
+                ", received: " +
+                body
+        }
+
+        if (extramessage) {
+            message += " (" + extramessage + ")"
+        }
+
+        const stacktrace: string = new Error().stack
+
+        try {
+            await fetch(Constants.ErrorReportServer, {
+                method: "POST",
+                body: JSON.stringify({
+                    stacktrace,
+                    message: "" + message,
+                    theme: this.theme.id,
+                    version: Constants.vNumber,
+                    language: this.userRelatedState.language.data,
+                    username: this.osmConnection.userDetails.data?.name,
+                    userid: this.osmConnection.userDetails.data?.uid,
+                    pendingChanges: this.changes.pendingChanges.data,
+                    previousChanges: this.changes.allChanges.data,
+                    changeRewrites: Utils.MapToObj(this.changes._changesetHandler._remappings)
+                })
+            })
+        } catch (e) {
+            console.error("Could not upload an error report")
+        }
+    }
+
+    public initSaveToLocalStorage() {
+        const toLocalStorage = new Map<string, SaveFeatureSourceToLocalStorage>()
+        this.perLayer.forEach((fs, layerId) => {
+            if (fs.layer.layerDef.source.geojsonSource !== undefined) {
+                return // We don't cache external data layers
+            }
+            const storage = new SaveFeatureSourceToLocalStorage(
+                this.osmConnection.Backend(),
+                fs.layer.layerDef.id,
+                ThemeSource.fromCacheZoomLevel,
+                fs,
+                this.featureProperties,
+                fs.layer.layerDef.maxAgeOfCache
+            )
+            toLocalStorage.set(layerId, storage)
+        })
+        return toLocalStorage
+    }
+
+    public showNormalDataOn(map: Store<MlMap>): ReadonlyMap<string, FilteringFeatureSource> {
+        const filteringFeatureSource = new Map<string, FilteringFeatureSource>()
+        this.perLayer.forEach((fs, layerName) => {
+            const doShowLayer = this.mapProperties.zoom.map(
+                (z) => {
+                    if (
+                        (fs.layer.isDisplayed?.data ?? true) &&
+                        z >= (fs.layer.layerDef?.minzoom ?? 0)
+                    ) {
+                        return true
+                    }
+                    if (this.layerState.globalFilters.data.some((f) => f.forceShowOnMatch)) {
+                        return true
+                    }
+                    return false
+                },
+                [fs.layer.isDisplayed, this.layerState.globalFilters]
+            )
+
+            if (!doShowLayer.data && this.featureSwitches.featureSwitchFilter.data === false) {
+                /* This layer is hidden and there is no way to enable it (filterview is disabled or this layer doesn't show up in the filter view as the name is not defined)
+                 *
+                 * This means that we don't have to filter it, nor do we have to display it
+                 *
+                 * Note: it is tempting to also permanently disable the layer if it is not visible _and_ the layer name is hidden.
+                 * However, this is _not_ correct: the layer might be hidden because zoom is not enough. Zooming in more _will_ reveal the layer!
+                 * */
+                return
+            }
+            const filtered = new FilteringFeatureSource(
+                fs.layer,
+                fs,
+                (id) => this.featureProperties.getStore(id),
+                this.layerState.globalFilters,
+                undefined,
+                this.mapProperties.zoom,
+                this.selectedElement
+            )
+            filteringFeatureSource.set(layerName, filtered)
+
+            new ShowDataLayer(map, {
+                layer: fs.layer.layerDef,
+                features: filtered,
+                doShowLayer,
+                metaTags: this.userRelatedState.preferencesAsTags,
+                selectedElement: this.selectedElement,
+                fetchStore: (id) => this.featureProperties.getStore(id)
+            })
+        })
+        return filteringFeatureSource
+    }
+
+}

src/Models/ThemeViewState/WithGuiState.ts

@@ -0,0 +1,72 @@
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { MenuState } from "../MenuState"
+import Hotkeys from "../../UI/Base/Hotkeys"
+import Translations from "../../UI/i18n/Translations"
+import { WithSpecialLayers } from "./WithSpecialLayers"
+
+/**
+ * Does all things related to:
+ * - The UI state
+ */
+export class WithGuiState extends WithSpecialLayers {
+    readonly guistate: MenuState
+
+    constructor(theme: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(theme, mvtAvailableLayers)
+        this.guistate = new MenuState(
+            this.featureSwitches.featureSwitchWelcomeMessage.data,
+            theme.id
+        )
+
+        Object.values(this.guistate.pageStates).forEach((toggle) => {
+            toggle.addCallbackD((isOpened) => {
+                // When a panel is closed: focus on the map again
+                if (!isOpened) {
+                    if (!this.guistate.isSomethingOpen()) {
+                        this.focusOnMap()
+                    }
+                }
+            })
+        })
+
+        this.initHotkeysGui()
+    }
+
+
+    private initHotkeysGui() {
+        const docs = Translations.t.hotkeyDocumentation
+
+        Hotkeys.RegisterHotkey({ nomod: "f" }, docs.selectFavourites, () => {
+            this.guistate.pageStates.favourites.set(true)
+        })
+
+        Hotkeys.RegisterHotkey(
+            {
+                nomod: "b"
+            },
+            docs.openLayersPanel,
+            () => {
+                if (this.featureSwitches.featureSwitchBackgroundSelection.data) {
+                    this.guistate.pageStates.background.setData(true)
+                }
+            }
+        )
+        Hotkeys.RegisterHotkey(
+            {
+                nomod: "s"
+            },
+            Translations.t.hotkeyDocumentation.openFilterPanel,
+            () => {
+                if (this.featureSwitches.featureSwitchFilter.data) {
+                    this.guistate.openFilterView()
+                }
+            }
+        )
+    }
+
+    public selectCurrentView() {
+        this.guistate.closeAll()
+        this.selectedElement.setData(this.currentView.features?.data?.[0])
+    }
+
+}

src/Models/ThemeViewState/WithImageState.ts

@@ -0,0 +1,68 @@
+import { ImageUploadManager } from "../../Logic/ImageProviders/ImageUploadManager"
+import { UIEventSource } from "../../Logic/UIEventSource"
+import { ProvidedImage } from "../../Logic/ImageProviders/ImageProvider"
+import { CombinedFetcher } from "../../Logic/Web/NearbyImagesSearch"
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { PanoramaxUploader } from "../../Logic/ImageProviders/Panoramax"
+import Constants from "../Constants"
+import Hash from "../../Logic/Web/Hash"
+import ThemeViewStateHashActor from "../../Logic/Web/ThemeViewStateHashActor"
+import PendingChangesUploader from "../../Logic/Actors/PendingChangesUploader"
+import { WithGuiState } from "./WithGuiState"
+import { SpecialVisualizationState } from "../../UI/SpecialVisualization"
+
+export class WithImageState extends WithGuiState implements SpecialVisualizationState {
+
+    readonly imageUploadManager: ImageUploadManager
+    readonly previewedImage = new UIEventSource<ProvidedImage>(undefined)
+    readonly nearbyImageSearcher: CombinedFetcher
+
+
+    constructor(layout: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(layout, mvtAvailableLayers)
+        this.imageUploadManager = new ImageUploadManager(
+            layout,
+            new PanoramaxUploader(
+                Constants.panoramax.url,
+                Constants.panoramax.token,
+                this.featureSwitchIsTesting.map((t) =>
+                    t ? Constants.panoramax.testsequence : Constants.panoramax.sequence
+                )
+            ),
+            this.featureProperties,
+            this.osmConnection,
+            this.changes,
+            this.geolocation.geolocationState.currentGPSLocation,
+            this.indexedFeatures,
+            this.reportError
+        )
+        const longAgo = new Date()
+        longAgo.setTime(new Date().getTime() - 5 * 365 * 24 * 60 * 60 * 1000)
+        this.nearbyImageSearcher = new CombinedFetcher(50, longAgo, this.indexedFeatures)
+
+
+        this.initActors()
+        Hash.hash.addCallbackAndRunD((hash) => {
+            if (hash === "current_view" || hash.match(/current_view_[0-9]+/)) {
+                this.selectCurrentView()
+            }
+        })
+
+    }
+
+    /**
+     * Setup various services for which no reference are needed
+     */
+    private initActors() {
+
+        new ThemeViewStateHashActor({
+            previewedImage: this.previewedImage,
+            selectedElement: this.selectedElement,
+            indexedFeatures: this.indexedFeatures,
+            guistate: this.guistate
+        })
+        new PendingChangesUploader(this.changes, this.selectedElement, this.imageUploadManager)
+
+
+    }
+}

src/Models/ThemeViewState/WithLayoutSourceState.ts

@@ -0,0 +1,129 @@
+import { WithSelectedElementState } from "./WithSelectedElementState"
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import ThemeSource from "../../Logic/FeatureSource/Sources/ThemeSource"
+import BBoxFeatureSource from "../../Logic/FeatureSource/Sources/TouchesBboxFeatureSource"
+import FeaturePropertiesStore from "../../Logic/FeatureSource/Actors/FeaturePropertiesStore"
+import LayerState from "../../Logic/State/LayerState"
+import { Store } from "../../Logic/UIEventSource"
+import { FeatureSource, IndexedFeatureSource } from "../../Logic/FeatureSource/FeatureSource"
+import { Tag } from "../../Logic/Tags/Tag"
+
+export class WithLayoutSourceState extends WithSelectedElementState {
+
+    readonly layerState: LayerState
+    readonly dataIsLoading: Store<boolean>
+
+    readonly featureProperties: FeaturePropertiesStore
+    readonly indexedFeatures: IndexedFeatureSource & ThemeSource
+    readonly featuresInView: FeatureSource
+    /**
+     * All 'level'-tags that are available with the current features
+     */
+    readonly floors: Store<string[]>
+
+
+    constructor(theme: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(theme)
+        /* Set up the layout source
+         * A bit tricky, as this is heavily intertwined with the 'changes'-element, which generates a stream of new and changed features too
+         */
+        this.layerState = new LayerState(
+            this.osmConnection,
+            theme.layers,
+            theme.id,
+            this.featureSwitches.featureSwitchLayerDefault
+        )
+
+        const layoutSource = new ThemeSource(
+            theme.layers,
+            this.featureSwitches,
+            this.mapProperties,
+            this.osmConnection.Backend(),
+            (id) => this.layerState.filteredLayers.get(id).isDisplayed,
+            mvtAvailableLayers,
+            this.fullNodeDatabase
+        )
+
+        this.featuresInView = new BBoxFeatureSource(layoutSource, this.mapProperties.bounds)
+        this.dataIsLoading = layoutSource.isLoading
+        this.indexedFeatures = layoutSource
+        this.featureProperties = new FeaturePropertiesStore(layoutSource)
+
+        this.floors = WithLayoutSourceState.initFloors(this.featuresInView)
+
+        this.initFilters()
+    }
+
+    /**
+     * Special bypass: if "favourites" is set, we still show items marked as 'favourite' even though the main layer is disabled
+     * @private
+     */
+    private initFilters() {
+        this.layerState.filteredLayers
+            .get("favourite")
+            ?.isDisplayed?.addCallbackAndRunD((favouritesShown) => {
+            const oldGlobal = this.layerState.globalFilters.data
+            const key = "show-favourite"
+            if (favouritesShown) {
+                this.layerState.globalFilters.set([
+                    ...oldGlobal,
+                    {
+                        forceShowOnMatch: true,
+                        id: key,
+                        osmTags: new Tag("_favourite", "yes"),
+                        state: 0,
+                        onNewPoint: undefined
+                    }
+                ])
+            } else {
+                this.layerState.globalFilters.set(oldGlobal.filter((gl) => gl.id !== key))
+            }
+        })
+
+    }
+
+    private static initFloors(features: FeatureSource): Store<string[]> {
+        return features.features.stabilized(500).map((features) => {
+            if (!features) {
+                return []
+            }
+            const floors = new Set<string>()
+            for (const feature of features) {
+                const level = feature.properties["_level"]
+                if (level) {
+                    const levels = level.split(";")
+                    for (const l of levels) {
+                        floors.add(l)
+                    }
+                } else {
+                    floors.add("0") // '0' is the default and is thus _always_ present
+                }
+            }
+            const sorted = Array.from(floors)
+            // Sort alphabetically first, to deal with floor "A", "B" and "C"
+            sorted.sort()
+            sorted.sort((a, b) => {
+                // We use the laxer 'parseInt' to deal with floor '1A'
+                const na = parseInt(a)
+                const nb = parseInt(b)
+                if (isNaN(na) || isNaN(nb)) {
+                    return 0
+                }
+                return na - nb
+            })
+            sorted.reverse(/* new list, no side-effects */)
+            return sorted
+        })
+    }
+
+    public openNewDialog() {
+        this.selectedElement.setData(undefined)
+
+        const { lon, lat } = this.mapProperties.location.data
+        const feature = this.lastClickObject.createFeature(lon, lat)
+        this.featureProperties.trackFeature(feature)
+        this.selectedElement.setData(feature)
+    }
+
+
+}

src/Models/ThemeViewState/WithSearchState.ts

@@ -0,0 +1,72 @@
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import SearchState from "../../Logic/State/SearchState"
+import Hotkeys from "../../UI/Base/Hotkeys"
+import Translations from "../../UI/i18n/Translations"
+import Zoomcontrol from "../../UI/Zoomcontrol"
+import { WithVisualFeedbackState } from "./WithVisualFeedbackState"
+import { ShowDataLayerOptions } from "../../UI/Map/ShowDataLayerOptions"
+import LayerConfig from "../ThemeConfig/LayerConfig"
+import ShowDataLayer from "../../UI/Map/ShowDataLayer"
+
+export class WithSearchState extends WithVisualFeedbackState {
+    public readonly searchState: SearchState
+
+    constructor(theme: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(theme, mvtAvailableLayers)
+        this.searchState = new SearchState(this)
+        this.initHotkeysSearch()
+
+        {
+            // Register the search layer on the map
+
+            const source = this.searchState.locationResults
+            const flayer = this.layerState.filteredLayers.get("search")
+            this.featureProperties.trackFeatureSource(source)
+            const options: ShowDataLayerOptions & { layer: LayerConfig } = {
+                features: source,
+                doShowLayer: flayer.isDisplayed,
+                layer: flayer.layerDef,
+                metaTags: this.userRelatedState.preferencesAsTags,
+                onClick: (feature) => {
+                    this.searchState.clickedOnMap(feature)
+                }
+            }
+            new ShowDataLayer(this.map, options)
+        }
+    }
+
+    private initHotkeysSearch() {
+        const docs = Translations.t.hotkeyDocumentation
+
+        Hotkeys.RegisterHotkey(
+            { ctrl: "F" },
+            docs.selectSearch,
+            () => {
+                this.searchState.feedback.set(undefined)
+                this.searchState.searchIsFocused.set(true)
+            }
+        )
+
+        Hotkeys.RegisterHotkey({ nomod: "Escape", onUp: true }, docs.closeSidebar, () => {
+            if (this.previewedImage.data !== undefined) {
+                this.previewedImage.setData(undefined)
+                return
+            }
+            if (this.selectedElement.data) {
+                this.selectedElement.setData(undefined)
+                return
+            }
+            if (this.searchState.showSearchDrawer.data) {
+                this.searchState.showSearchDrawer.set(false)
+                return
+            }
+            if (this.guistate.closeAll()) {
+                return
+            }
+            Zoomcontrol.resetzoom()
+            this.focusOnMap()
+        })
+
+    }
+
+}

src/Models/ThemeViewState/WithSelectedElementState.ts

@@ -0,0 +1,79 @@
+import { UserMapFeatureswitchState } from "./UserMapFeatureswitchState"
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { UIEventSource } from "../../Logic/UIEventSource"
+import { Feature } from "geojson"
+import Zoomcontrol from "../../UI/Zoomcontrol"
+import { GeoOperations } from "../../Logic/GeoOperations"
+import { GeocodeResult } from "../../Logic/Search/GeocodingProvider"
+
+/**
+ * The state interactions with a selected element, but is blind to loading elements
+ *
+ *
+ * No GUI stuff
+ */
+export class WithSelectedElementState extends UserMapFeatureswitchState {
+
+
+    readonly selectedElement: UIEventSource<Feature>
+
+    constructor(theme: ThemeConfig) {
+        const selectedElement = new UIEventSource<Feature | undefined>(undefined, "Selected element")
+        super(theme, selectedElement)
+        this.selectedElement = selectedElement
+        this.selectedElement.addCallback((selected) => {
+            if (selected === undefined) {
+                Zoomcontrol.resetzoom()
+            }
+        })
+
+        this.mapProperties.lastClickLocation.addCallbackD((lastClick) => {
+            if (lastClick.mode !== "left" || !lastClick.nearestFeature) {
+                return
+            }
+            const f = lastClick.nearestFeature
+            this.setSelectedElement(f)
+        })
+
+
+        // Add the selected element to the recently visited history
+        this.selectedElement.addCallbackD((selected) => {
+            const [osm_type, osm_id] = selected.properties.id.split("/")
+            const [lon, lat] = GeoOperations.centerpointCoordinates(selected)
+            const layer = this.theme.getMatchingLayer(selected.properties)
+
+            const nameOptions = [
+                selected?.properties?.name,
+                selected?.properties?.alt_name,
+                selected?.properties?.local_name,
+                layer?.title.GetRenderValue(selected?.properties ?? {}).txt,
+                selected.properties.display_name,
+                selected.properties.id
+            ]
+            const r = <GeocodeResult>{
+                feature: selected,
+                display_name: nameOptions.find((opt) => opt !== undefined),
+                osm_id,
+                osm_type,
+                lon,
+                lat
+            }
+            this.userRelatedState.recentlyVisitedSearch.add(r)
+        })
+
+    }
+
+    protected setSelectedElement(feature: Feature) {
+        const current = this.selectedElement.data
+        if (
+            current?.properties?.id !== undefined &&
+            current.properties.id === feature.properties.id
+        ) {
+            console.log("Not setting selected, same id", current, feature)
+            return // already set
+        }
+        this.selectedElement.setData(feature)
+    }
+
+
+}

src/Models/ThemeViewState/WithSpecialLayers.ts

@@ -0,0 +1,227 @@
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { WithChangesState } from "./WithChangesState"
+import FavouritesFeatureSource from "../../Logic/FeatureSource/Sources/FavouritesFeatureSource"
+import Constants from "../Constants"
+import { FeatureSource } from "../../Logic/FeatureSource/FeatureSource"
+import StaticFeatureSource from "../../Logic/FeatureSource/Sources/StaticFeatureSource"
+import { Feature } from "geojson"
+import { BBox } from "../../Logic/BBox"
+import ShowDataLayer from "../../UI/Map/ShowDataLayer"
+import MetaTagging from "../../Logic/MetaTagging"
+import FilteredLayer from "../FilteredLayer"
+import LayerConfig from "../ThemeConfig/LayerConfig"
+import { LayerConfigJson } from "../ThemeConfig/Json/LayerConfigJson"
+import last_click_layerconfig from "../../assets/generated/layers/last_click.json"
+import { GeoOperations } from "../../Logic/GeoOperations"
+import summaryLayer from "../../assets/generated/layers/summary.json"
+import { UIEventSource } from "../../Logic/UIEventSource"
+import NearbyFeatureSource from "../../Logic/FeatureSource/Sources/NearbyFeatureSource"
+import {
+    SummaryTileSource,
+    SummaryTileSourceRewriter
+} from "../../Logic/FeatureSource/TiledFeatureSource/SummaryTileSource"
+import { ShowDataLayerOptions } from "../../UI/Map/ShowDataLayerOptions"
+
+export class WithSpecialLayers extends WithChangesState {
+
+    readonly favourites: FavouritesFeatureSource
+    /**
+     * When hovering (in the popup) an image, the location of the image will be revealed on the main map.
+     * This store contains those images that should be shown, probably only the currently hovered image
+     */
+    readonly geocodedImages: UIEventSource<Feature[]> = new UIEventSource<Feature[]>([])
+    /**
+     * Contains a few (<10) >features that are near the center of the map.
+     */
+    readonly closestFeatures: NearbyFeatureSource
+
+    readonly featureSummary: SummaryTileSourceRewriter
+    /**
+     * When using arrow keys to move, the accessibility mode is activated, which has a small rectangle set.
+     * This is the 'viewport' which 'closestFeatures' uses to filter wilt
+     */
+    readonly visualFeedbackViewportBounds: UIEventSource<BBox> = new UIEventSource<BBox>(undefined)
+
+
+    constructor(theme: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(theme, mvtAvailableLayers)
+
+        this.favourites = new FavouritesFeatureSource(this)
+
+        this.closestFeatures = new NearbyFeatureSource(
+            this.mapProperties.location,
+            this.perLayerFiltered,
+            {
+                currentZoom: this.mapProperties.zoom,
+                layerState: this.layerState,
+                bounds: this.visualFeedbackViewportBounds.map(
+                    (bounds) => bounds ?? this.mapProperties.bounds?.data,
+                    [this.mapProperties.bounds]
+                )
+            }
+        )
+        this.closestFeatures.registerSource(this.favourites, "favourite")
+
+        this.featureSummary = this.setupSummaryLayer()
+        this.initActorsSpecialLayers()
+        this.drawSpecialLayers()
+        this.drawLastClick()
+        // Note: the lock-range is handled by UserMapFeatureSwitchState
+        {
+            // Activate metatagging for the 'current_view' layer
+            console.log(">>>", this.layerState.filteredLayers)
+            const currentViewLayer = this.layerState.filteredLayers.get("current_view")?.layerDef
+            if (currentViewLayer?.tagRenderings?.length > 0) {
+                const params = MetaTagging.createExtraFuncParams(this)
+                this.currentView.features.addCallbackAndRunD((features) => {
+                    MetaTagging.addMetatags(
+                        features,
+                        params,
+                        currentViewLayer,
+                        this.theme,
+                        this.osmObjectDownloader,
+                        this.featureProperties
+                    )
+                })
+            }
+        }
+
+
+    }
+
+
+    private setupSummaryLayer(): SummaryTileSourceRewriter | undefined {
+        /**
+         * MaxZoom for the summary layer
+         */
+        const normalLayers = this.theme.layers.filter((l) => l.isNormal())
+
+        const maxzoom = Math.min(...normalLayers.map((l) => l.minzoom))
+
+        const layers = this.theme.layers.filter(
+            (l) =>
+                (<string[]>(<unknown>Constants.priviliged_layers)).indexOf(l.id) < 0 &&
+                l.source.geojsonSource === undefined &&
+                l.doCount
+        )
+        if (!Constants.SummaryServer || layers.length === 0) {
+            return undefined
+        }
+        const summaryTileSource = new SummaryTileSource(
+            Constants.SummaryServer,
+            layers.map((l) => l.id),
+            this.mapProperties.zoom.map((z) => Math.max(Math.floor(z), 0)),
+            this.mapProperties,
+            {
+                isActive: this.mapProperties.zoom.map((z) => z < maxzoom)
+            }
+        )
+
+        const source = new SummaryTileSourceRewriter(summaryTileSource, this.layerState.filteredLayers)
+
+        new ShowDataLayer(this.map, {
+            features: source,
+            layer: new LayerConfig(<LayerConfigJson>summaryLayer, "summaryLayer"),
+            // doShowLayer: this.mapProperties.zoom.map((z) => z < maxzoom),
+            selectedElement: this.selectedElement
+        })
+        return source
+    }
+
+    protected registerSpecialLayer(flayer: FilteredLayer, source: FeatureSource) {
+        if (!source?.features) {
+            return
+        }
+
+        this.featureProperties.trackFeatureSource(source)
+        const options: ShowDataLayerOptions & { layer: LayerConfig } = {
+            features: source,
+            doShowLayer: flayer.isDisplayed,
+            layer: flayer.layerDef,
+            metaTags: this.userRelatedState.preferencesAsTags,
+            selectedElement: this.selectedElement
+        }
+        new ShowDataLayer(this.map, options)
+    }
+
+    private drawLastClick() {
+        const source = this.lastClickObject
+        const lastClickLayerConfig = new LayerConfig(
+            <LayerConfigJson>last_click_layerconfig,
+            "last_click"
+        )
+        const lastClickFiltered =
+            lastClickLayerConfig.isShown === undefined
+                ? source
+                : source.features.mapD((fs) =>
+                    fs.filter((f) => {
+                        const matches = lastClickLayerConfig.isShown.matchesProperties(
+                            f.properties
+                        )
+                        console.debug("LastClick ", f, "matches", matches)
+                        return matches
+                    })
+                )
+        // show last click = new point/note marker
+        new ShowDataLayer(this.map, {
+            features: new StaticFeatureSource(lastClickFiltered),
+            layer: lastClickLayerConfig,
+            onClick: (feature) => {
+                if (this.mapProperties.zoom.data >= Constants.minZoomLevelToAddNewPoint) {
+                    this.selectedElement.setData(feature)
+                    return
+                }
+                this.map.data.flyTo({
+                    zoom: Constants.minZoomLevelToAddNewPoint,
+                    center: GeoOperations.centerpointCoordinates(feature)
+                })
+            }
+        })
+    }
+
+    private drawSpecialLayers() {
+
+        type AddedByDefaultTypes = (typeof Constants.added_by_default)[number]
+        type LayersToAdd = "current_view" | Exclude<AddedByDefaultTypes,
+            "search" // Handled by WithSearchState
+            | "last_click" // handled by this.drawLastClick()
+            | "summary" // handled by setupSummaryLayer
+            | "range" // handled by UserMapFeatureSwitchState
+        >
+        const empty = []
+        /**
+         * A listing which maps the layerId onto the featureSource
+         */
+        const specialLayers: Record<LayersToAdd, FeatureSource> = {
+            home_location: this.userRelatedState.homeLocation,
+            gps_location: this.geolocation.currentUserLocation,
+            gps_location_history: this.geolocation.historicalUserLocations,
+            gps_track: this.geolocation.historicalUserLocationsTrack,
+            current_view: this.currentView,
+            favourite: this.favourites,
+            geocoded_image: new StaticFeatureSource(this.geocodedImages),
+            selected_element: new StaticFeatureSource(
+                this.selectedElement.map((f) => (f === undefined ? empty : [f]))
+            )
+        }
+
+
+        // enumerate all 'normal' layers and match them with the appropriate 'special' layer - if applicable
+        this.layerState.filteredLayers.forEach((flayer) => {
+            this.registerSpecialLayer(flayer, specialLayers[flayer.layerDef.id])
+        })
+
+    }
+
+    private initActorsSpecialLayers() {
+        this.selectedElement.addCallback((selected) => {
+            if (selected === undefined) {
+                this.focusOnMap()
+                this.geocodedImages.set([])
+            } else {
+                this.lastClickObject.clear()
+            }
+        })
+    }
+
+}

src/Models/ThemeViewState/WithUserRelatedState.ts

@@ -0,0 +1,107 @@
+import { Utils } from "../../Utils"
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { OsmConnection } from "../../Logic/Osm/OsmConnection"
+import UserRelatedState from "../../Logic/State/UserRelatedState"
+import { QueryParameters } from "../../Logic/Web/QueryParameters"
+import FeatureSwitchState from "../../Logic/State/FeatureSwitchState"
+import { Store, UIEventSource } from "../../Logic/UIEventSource"
+import LayerConfig from "../ThemeConfig/LayerConfig"
+import { LastClickFeatureSource } from "../../Logic/FeatureSource/Sources/LastClickFeatureSource"
+import { GeocodingUtils } from "../../Logic/Search/GeocodingProvider"
+
+export class WithUserRelatedState {
+    readonly theme: ThemeConfig
+
+    readonly featureSwitches: FeatureSwitchState
+    readonly featureSwitchIsTesting: Store<boolean>
+    readonly featureSwitchUserbadge: Store<boolean>
+
+    readonly osmConnection: OsmConnection
+    readonly userRelatedState: UserRelatedState
+    readonly overlayLayerStates: ReadonlyMap<
+        string,
+        { readonly isDisplayed: UIEventSource<boolean> }
+    >
+
+    constructor(theme: ThemeConfig, rasterLayer: Store<{ properties: { id: string } }>) {
+        {
+            // Some weird setups
+            Utils.initDomPurify()
+            if (!Utils.runningFromConsole && theme.customCss !== undefined && window.location.pathname.indexOf("theme") >= 0) {
+                Utils.LoadCustomCss(theme.customCss)
+            }
+        }
+        this.theme = theme
+        this.featureSwitches = new FeatureSwitchState(theme)
+        this.osmConnection = new OsmConnection({
+            dryRun: this.featureSwitches.featureSwitchIsTesting,
+            fakeUser: this.featureSwitches.featureSwitchFakeUser.data,
+            oauth_token: QueryParameters.GetQueryParameter(
+                "oauth_token",
+                undefined,
+                "Used to complete the login"
+            )
+        })
+
+        this.featureSwitchIsTesting = this.featureSwitches.featureSwitchIsTesting
+        this.featureSwitchUserbadge = this.featureSwitches.featureSwitchEnableLogin
+
+        this.userRelatedState = new UserRelatedState(
+            this.osmConnection,
+            theme,
+            this.featureSwitches,
+            rasterLayer
+        )
+
+        if (!this.theme.official) {
+            // Add custom themes to the "visited custom themes"
+            const th = this.theme
+            this.userRelatedState.addUnofficialTheme({
+                id: th.id,
+                icon: th.icon,
+                title: th.title.translations,
+                shortDescription: th.shortDescription.translations,
+                layers: th.layers.filter((l) => l.isNormal()).map((l) => l.id)
+            })
+        }
+
+        const overlayLayerStates = new Map<string, { isDisplayed: UIEventSource<boolean> }>()
+        this.overlayLayerStates = overlayLayerStates
+        for (const rasterInfo of this.theme.tileLayerSources) {
+            const isDisplayed = QueryParameters.GetBooleanQueryParameter(
+                "overlay-" + rasterInfo.id,
+                rasterInfo.defaultState ?? true,
+                "Whether or not overlay layer " + rasterInfo.id + " is shown"
+            )
+            const state = { isDisplayed }
+            overlayLayerStates.set(rasterInfo.id, state)
+        }
+    }
+
+    /**
+     * Searches the appropriate layer - will first try if a special layer matches; if not, a normal layer will be used by delegating to the theme
+     */
+    public getMatchingLayer(properties: Record<string, string>): LayerConfig | undefined {
+        const id = properties.id
+
+        if (id.startsWith("summary_")) {
+            // We don't select 'summary'-objects
+            return undefined
+        }
+
+        if (id === "settings") {
+            return UserRelatedState.usersettingsConfig
+        }
+        if (id.startsWith(LastClickFeatureSource.newPointElementId)) {
+            return this.theme.layers.find((l) => l.id === "last_click")
+        }
+        if (id.startsWith("search_result")) {
+            return GeocodingUtils.searchLayer
+        }
+        if (id === "location_track") {
+            return this.theme.layers.find((l) => l.id === "gps_track")
+        }
+        return this.theme.getMatchingLayer(properties)
+    }
+
+}

src/Models/ThemeViewState/WithVisualFeedbackState.ts

@@ -0,0 +1,108 @@
+import ThemeConfig from "../ThemeConfig/ThemeConfig"
+import { UIEventSource } from "../../Logic/UIEventSource"
+import Hotkeys from "../../UI/Base/Hotkeys"
+import Translations from "../../UI/i18n/Translations"
+import ThemeViewState from "../ThemeViewState"
+
+export class WithVisualFeedbackState extends ThemeViewState {
+    /**
+     * If true, the user interface will toggle some extra aids for people using screenreaders and keyboard navigation
+     * Triggered by navigating the map with arrows or by pressing 'space' or 'enter'
+     */
+    public readonly visualFeedback: UIEventSource<boolean> = new UIEventSource<boolean>(false)
+
+    constructor(theme: ThemeConfig, mvtAvailableLayers: Set<string>) {
+        super(theme, mvtAvailableLayers)
+        this.initHotkeysVisualFeedback()
+
+        ///// ACTORS /////
+
+        this.userRelatedState.a11y.addCallbackAndRunD((a11y) => {
+            if (a11y === "always") {
+                this.visualFeedback.setData(true)
+            } else if (a11y === "never") {
+                this.visualFeedback.setData(false)
+            }
+        })
+        this.mapProperties.onKeyNavigationEvent((keyEvent) => {
+            if (this.userRelatedState.a11y.data === "never") {
+                return
+            }
+            if (["north", "east", "south", "west"].indexOf(keyEvent.key) >= 0) {
+                this.visualFeedback.setData(true)
+                return true // Our job is done, unregister
+            }
+        })
+    }
+
+
+    /**
+     * Selects the feature that is 'i' closest to the map center
+     */
+    private selectClosestAtCenter(i: number = 0) {
+        console.log("Selecting closest", i)
+        if (this.userRelatedState.a11y.data !== "never") {
+            this.visualFeedback.setData(true)
+        }
+
+        const toSelect = this.closestFeatures.features?.data?.[i]
+        if (!toSelect) {
+            window.requestAnimationFrame(() => {
+                const toSelect = this.closestFeatures.features?.data?.[i]
+                if (!toSelect) {
+                    return
+                }
+                this.setSelectedElement(toSelect)
+            })
+            return
+        }
+        this.setSelectedElement(toSelect)
+    }
+
+    private initHotkeysVisualFeedback() {
+        const docs = Translations.t.hotkeyDocumentation
+
+        Hotkeys.RegisterHotkey(
+            {
+                nomod: " ",
+                onUp: true
+            },
+            docs.selectItem,
+            () => {
+                if (this.selectedElement.data !== undefined) {
+                    return false
+                }
+                if (this.guistate.isSomethingOpen() || this.previewedImage.data !== undefined) {
+                    return
+                }
+                if (
+                    document.activeElement.tagName === "button" ||
+                    document.activeElement.tagName === "input"
+                ) {
+                    return
+                }
+                this.selectClosestAtCenter(0)
+            }
+        )
+
+        for (let i = 1; i < 9; i++) {
+            let doc = docs.selectItemI.Subs({ i })
+            if (i === 1) {
+                doc = docs.selectItem
+            } else if (i === 2) {
+                doc = docs.selectItem2
+            } else if (i === 3) {
+                doc = docs.selectItem3
+            }
+            Hotkeys.RegisterHotkey(
+                {
+                    nomod: "" + i,
+                    onUp: true
+                },
+                doc,
+                () => this.selectClosestAtCenter(i - 1)
+            )
+        }
+
+    }
+}

src/UI/BigComponents/NewPointLocationInput.svelte

@@ -60,7 +60,7 @@
   export let presetProperties: Tag[] = []
   let presetPropertiesUnpacked = TagUtils.KVtoProperties(presetProperties)
 
-  export let snappedTo: UIEventSource<WayId | undefined>
+  export let snappedTo: UIEventSource<WayId | undefined> = new UIEventSource<WayId | undefined>(undefined)
 
   const map: UIEventSource<MlMap> = new UIEventSource<MlMap>(undefined)
   export let mapProperties: Partial<MapProperties> & { location } = {

src/UI/Favourites/FavouriteSummary.svelte

@@ -1,13 +1,13 @@
 <script lang="ts">
-  import type { SpecialVisualizationState } from "../SpecialVisualization"
   import TagRenderingAnswer from "../Popup/TagRendering/TagRenderingAnswer.svelte"
   import type { Feature } from "geojson"
   import { UIEventSource } from "../../Logic/UIEventSource"
   import { GeoOperations } from "../../Logic/GeoOperations"
+  import ThemeViewState from "../../Models/ThemeViewState"
 
   export let feature: Feature
   let properties: Record<string, string> = feature.properties
-  export let state: SpecialVisualizationState
+  export let state: ThemeViewState
   let tags =
     state.featureProperties.getStore(properties.id) ??
     new UIEventSource<Record<string, string>>(properties)

src/UI/Popup/AddNewPoint/AddNewPoint.svelte

@@ -3,7 +3,6 @@
    * This component ties together all the steps that are needed to create a new point.
    * There are many subcomponents which help with that
    */
-  import type { SpecialVisualizationState } from "../../SpecialVisualization"
   import PresetList from "./PresetList.svelte"
   import type PresetConfig from "../../../Models/ThemeConfig/PresetConfig"
   import LayerConfig from "../../../Models/ThemeConfig/LayerConfig"
@@ -37,9 +36,10 @@
   import ToSvelte from "../../Base/ToSvelte.svelte"
   import BaseUIElement from "../../BaseUIElement"
   import TitledPanel from "../../Base/TitledPanel.svelte"
+  import ThemeViewState from "../../../Models/ThemeViewState"
 
   export let coordinate: { lon: number; lat: number }
-  export let state: SpecialVisualizationState
+  export let state: ThemeViewState
 
   let selectedPreset: {
     preset: PresetConfig
@@ -78,7 +78,7 @@
 
   const isLoading = state.dataIsLoading
   let preciseCoordinate: UIEventSource<{ lon: number; lat: number }> = new UIEventSource(undefined)
-  let snappedToObject: UIEventSource<string> = new UIEventSource<string>(undefined)
+  let snappedToObject: UIEventSource<WayId> = new UIEventSource<string>(undefined)
 
   // Small helper variable: if the map is tapped, we should let the 'Next'-button grab some attention as users have to click _that_ to continue, not the map
   let preciseInputIsTapped = false
@@ -153,7 +153,7 @@
 
   function confirmSync() {
     confirm()
-      .then((_) => console.debug("New point successfully handled"))
+      .then(() => console.debug("New point successfully handled"))
       .catch((e) => console.error("Handling the new point went wrong due to", e))
   }
 </script>

src/UI/Popup/ImportButtons/ImportFlow.svelte

@@ -20,9 +20,11 @@
   import FilteredLayer from "../../../Models/FilteredLayer"
   import Confirm from "../../../assets/svg/Confirm.svelte"
   import Layers from "../../../assets/svg/Layers.svelte"
+  import { WithGuiState } from "../../../Models/ThemeViewState/WithGuiState"
+  import ThemeViewState from "../../../Models/ThemeViewState"
 
   export let importFlow: ImportFlow<ImportFlowArguments>
-  let state = importFlow.state
+  let state: ThemeViewState = importFlow.state
 
   export let currentFlowStep: "start" | "confirm" | "importing" | "imported" = "start"
 

src/UI/Popup/ImportButtons/ImportFlow.ts

@@ -1,4 +1,3 @@
-import { SpecialVisualizationState } from "../../SpecialVisualization"
 import { Utils } from "../../../Utils"
 import { ImmutableStore, Store, UIEventSource } from "../../../Logic/UIEventSource"
 import { Tag } from "../../../Logic/Tags/Tag"
@@ -10,6 +9,7 @@ import FilteredLayer from "../../../Models/FilteredLayer"
 import LayerConfig from "../../../Models/ThemeConfig/LayerConfig"
 import { LayerConfigJson } from "../../../Models/ThemeConfig/Json/LayerConfigJson"
 import conflation_json from "../../../../assets/layers/conflation/conflation.json"
+import ThemeViewState from "../../../Models/ThemeViewState"
 
 export interface ImportFlowArguments {
     readonly text: string
@@ -123,7 +123,7 @@ ${Utils.special_visualizations_importRequirementDocs}
         argsRaw: string[]
     ): string[] {
         const deps = ImportFlowUtils.getLayerDependencies(argsRaw, argSpec)
-        const argsParsed: PointImportFlowArguments = <any>Utils.ParseVisArgs(argSpec, argsRaw)
+        const argsParsed: PointImportFlowArguments = Utils.ParseVisArgs <PointImportFlowArguments>(argSpec, argsRaw)
         const snapOntoLayers = argsParsed.snap_onto_layers?.split(";")?.map((l) => l.trim()) ?? []
         deps.push(...snapOntoLayers)
         return deps
@@ -136,14 +136,14 @@ ${Utils.special_visualizations_importRequirementDocs}
  * This class works together closely with ImportFlow.svelte
  */
 export default abstract class ImportFlow<ArgT extends ImportFlowArguments> {
-    public readonly state: SpecialVisualizationState
+    public readonly state: ThemeViewState
     public readonly args: ArgT
     public readonly targetLayer: FilteredLayer[]
     public readonly tagsToApply: Store<Tag[]>
     protected readonly _originalFeatureTags: UIEventSource<Record<string, string>>
 
     constructor(
-        state: SpecialVisualizationState,
+        state: ThemeViewState,
         args: ArgT,
         tagsToApply: Store<Tag[]>,
         originalTags: UIEventSource<Record<string, string>>
@@ -153,7 +153,7 @@ export default abstract class ImportFlow<ArgT extends ImportFlowArguments> {
         this.tagsToApply = tagsToApply
         this._originalFeatureTags = originalTags
         this.targetLayer = args.targetLayer.split(" ").map((tl) => {
-            let found = state.layerState.filteredLayers.get(tl)
+            const found = state.layerState.filteredLayers.get(tl)
             if (!found) {
                 throw "Layer " + tl + " not found"
             }

src/UI/Popup/ImportButtons/PointImportFlowState.ts

@@ -1,5 +1,4 @@
 import ImportFlow, { ImportFlowArguments } from "./ImportFlow"
-import { SpecialVisualizationState } from "../../SpecialVisualization"
 import { Store, UIEventSource } from "../../../Logic/UIEventSource"
 import { OsmObject, OsmWay } from "../../../Logic/Osm/OsmObject"
 import CreateNewNodeAction from "../../../Logic/Osm/Actions/CreateNewNodeAction"
@@ -7,6 +6,7 @@ import { Feature, Point } from "geojson"
 import Maproulette from "../../../Logic/Maproulette"
 import { GeoOperations } from "../../../Logic/GeoOperations"
 import { Tag } from "../../../Logic/Tags/Tag"
+import ThemeViewState from "../../../Models/ThemeViewState"
 
 export interface PointImportFlowArguments extends ImportFlowArguments {
     max_snap_distance?: string
@@ -21,7 +21,7 @@ export class PointImportFlowState extends ImportFlow<PointImportFlowArguments> {
     public readonly startCoordinate: [number, number]
 
     constructor(
-        state: SpecialVisualizationState,
+        state: ThemeViewState,
         originalFeature: Feature<Point>,
         args: PointImportFlowArguments,
         tagsToApply: Store<Tag[]>,

src/UI/Popup/Notes/CreateNewNote.svelte

@@ -20,9 +20,10 @@
   import NextButton from "../../Base/NextButton.svelte"
   import Note from "../../../assets/svg/Note.svelte"
   import TitledPanel from "../../Base/TitledPanel.svelte"
+  import ThemeViewState from "../../../Models/ThemeViewState"
 
   export let coordinate: UIEventSource<{ lon: number; lat: number }>
-  export let state: SpecialVisualizationState
+  export let state: ThemeViewState
 
   let comment: UIEventSource<string> = LocalStorageSource.get("note-text")
   let created = false
@@ -33,7 +34,6 @@
   let isDisplayed = notelayer?.isDisplayed
 
   let submitted = false
-  let textEntered = false
 
   function enableNoteLayer() {
     state.guistate.closeAll()

src/UI/Reviews/SingleReview.svelte

@@ -5,9 +5,9 @@
   import Translations from "../i18n/Translations"
   import Tr from "../Base/Tr.svelte"
   import { ariaLabel } from "../../Utils/ariaLabel"
-  import type { SpecialVisualizationState } from "../SpecialVisualization"
+  import ThemeViewState from "../../Models/ThemeViewState"
 
-  export let state: SpecialVisualizationState = undefined
+  export let state: ThemeViewState = undefined
   export let review: Review & {
     kid: string
     signature: string

src/UI/Search/GeocodeResults.svelte

@@ -13,8 +13,9 @@
   import { CogIcon } from "@rgossiaux/svelte-heroicons/solid"
   import { TrashIcon } from "@babeard/svelte-heroicons/mini"
   import type { GeocodeResult } from "../../Logic/Search/GeocodingProvider"
+  import { WithSearchState } from "../../Models/ThemeViewState/WithSearchState"
 
-  export let state: SpecialVisualizationState
+  export let state: WithSearchState
 
   let searchTerm = state.searchState.searchTerm
   let results = state.searchState.suggestions

src/UI/SpecialVisualization.ts

@@ -1,11 +1,7 @@
 import { Store, UIEventSource } from "../Logic/UIEventSource"
 import BaseUIElement from "./BaseUIElement"
 import ThemeConfig from "../Models/ThemeConfig/ThemeConfig"
-import {
+import { FeatureSource, IndexedFeatureSource, WritableFeatureSource } from "../Logic/FeatureSource/FeatureSource"
-    FeatureSource,
-    IndexedFeatureSource,
-    WritableFeatureSource,
-} from "../Logic/FeatureSource/FeatureSource"
 import { OsmConnection } from "../Logic/Osm/OsmConnection"
 import { Changes } from "../Logic/Osm/Changes"
 import { ExportableMap, MapProperties } from "../Models/MapProperties"
@@ -15,7 +11,6 @@ import FullNodeDatabaseSource from "../Logic/FeatureSource/TiledFeatureSource/Fu
 import { GeoIndexedStoreForLayer } from "../Logic/FeatureSource/Actors/GeoIndexedStore"
 import LayerConfig from "../Models/ThemeConfig/LayerConfig"
 import FeatureSwitchState from "../Logic/State/FeatureSwitchState"
-import { MenuState } from "../Models/MenuState"
 import OsmObjectDownloader from "../Logic/Osm/OsmObjectDownloader"
 import { ImageUploadManager } from "../Logic/ImageProviders/ImageUploadManager"
 import FavouritesFeatureSource from "../Logic/FeatureSource/Sources/FavouritesFeatureSource"
@@ -25,7 +20,6 @@ import ThemeSource from "../Logic/FeatureSource/Sources/ThemeSource"
 import { Map as MlMap } from "maplibre-gl"
 import ShowDataLayer from "./Map/ShowDataLayer"
 import { CombinedFetcher } from "../Logic/Web/NearbyImagesSearch"
-import SearchState from "../Logic/State/SearchState"
 import UserRelatedState from "../Logic/State/UserRelatedState"
 import FeaturePropertiesStore from "../Logic/FeatureSource/Actors/FeaturePropertiesStore"
 
@@ -33,7 +27,6 @@ import FeaturePropertiesStore from "../Logic/FeatureSource/Actors/FeaturePropert
  * The state needed to render a special Visualisation.
  */
 export interface SpecialVisualizationState {
-    readonly guistate: MenuState
     readonly theme: ThemeConfig
     readonly featureSwitches: FeatureSwitchState
 
@@ -82,7 +75,6 @@ export interface SpecialVisualizationState {
     readonly nearbyImageSearcher: CombinedFetcher
     readonly geolocation: GeoLocationHandler
     readonly geocodedImages: UIEventSource<Feature[]>
-    readonly searchState: SearchState
 
     getMatchingLayer(properties: Record<string, string>): LayerConfig | undefined
 

src/UI/ThemeViewGUI.svelte

@@ -8,7 +8,6 @@
   import type { Feature } from "geojson"
   import SelectedElementView from "./BigComponents/SelectedElementView.svelte"
   import LayerConfig from "../Models/ThemeConfig/LayerConfig"
-  import ThemeViewState from "../Models/ThemeViewState"
   import type { MapProperties } from "../Models/MapProperties"
   import Translations from "./i18n/Translations"
   import { MenuIcon } from "@rgossiaux/svelte-heroicons/solid"
@@ -48,8 +47,14 @@
   import { linear } from "svelte/easing"
   import DefaultIcon from "./Map/DefaultIcon.svelte"
   import Loading from "./Base/Loading.svelte"
+  import { WithSearchState } from "../Models/ThemeViewState/WithSearchState"
+  import TitleHandler from "../Logic/Actors/TitleHandler"
 
-  export let state: ThemeViewState
+  export let state: WithSearchState
+  new TitleHandler(state.selectedElement, state)
+
+  console.log("The state is", state)
+  state.focusOnMap()
 
   let theme = state.theme
   let maplibremap: UIEventSource<MlMap> = state.map

src/index.ts

@@ -1,5 +1,4 @@
 import DetermineTheme from "./Logic/DetermineTheme"
-import ThemeViewState from "./Models/ThemeViewState"
 import SvelteUIElement from "./UI/Base/SvelteUIElement"
 import ThemeViewGUI from "./UI/ThemeViewGUI.svelte"
 import { FixedUiElement } from "./UI/Base/FixedUiElement"
@@ -8,6 +7,7 @@ import { SubtleButton } from "./UI/Base/SubtleButton"
 import { Utils } from "./Utils"
 import Constants from "./Models/Constants"
 import ArrowDownTray from "@babeard/svelte-heroicons/mini/ArrowDownTray"
+import { WithSearchState } from "./Models/ThemeViewState/WithSearchState"
 
 function webgl_support() {
     try {
@@ -53,7 +53,7 @@ async function main() {
             await getAvailableLayers(),
         ])
         console.log("The available layers on server are", Array.from(availableLayers))
-        const state = new ThemeViewState(theme, availableLayers)
+        const state = new WithSearchState(theme, availableLayers)
         const target = document.getElementById("maindiv")
         const childs = Array.from(target.children)
         new ThemeViewGUI({

src/index_theme.ts.template

@@ -49,7 +49,7 @@ async function main() {
         MetaTagging.setThemeMetatagging(new ThemeMetaTagging())
         // LAYOUT.ADD_LAYERS
         // LAYOUT.ADD_CONFIG
-        const state = new ThemeViewState(new ThemeConfig(<any> layout), availableLayers)
+        const state = new WithSearchState(new ThemeConfig(<any> layout), availableLayers)
         const target =  document.getElementById("maindiv")
         const childs = Array.from(target.children)
         new ThemeViewGUI({