Change internal style filesystem to an internal registry and introduce style options concept

app/src/main/assets/library/maplibre/gl-js/dist/THIRD_PARTY_NOTICES.md

@@ -3,11 +3,10 @@ Builds included inside /dist correspond to MapLibre GL JS version 5.24.0 <br>
 The source for these builds is available on https://github.com/maplibre/maplibre-gl-js
 #
 
-All files inside the /dist folder are under the following license
+All files inside the /dist folder are subject to the following license
 
 -------------------------------------------------------------------------------
 
-
 Copyright (c) 2023, MapLibre contributors
 
 All rights reserved.

app/src/main/java/eu/konggdev/strikemaps/MainActivity.java

@@ -1,8 +1,5 @@
 package eu.konggdev.strikemaps;
 
-import static org.maplibre.android.style.layers.PropertyFactory.lineColor;
-import static org.maplibre.android.style.layers.PropertyFactory.lineWidth;
-
 import eu.konggdev.strikemaps.app.AppController;
 
 import android.os.Bundle;

app/src/main/java/eu/konggdev/strikemaps/app/AppController.java

@@ -4,8 +4,8 @@ import android.content.SharedPreferences;
 import androidx.appcompat.app.AppCompatActivity;
 
 import eu.konggdev.strikemaps.MainActivity;
-import eu.konggdev.strikemaps.R;
 import eu.konggdev.strikemaps.map.MapComponent;
+import eu.konggdev.strikemaps.storage.RegistryStorageComponent;
 import eu.konggdev.strikemaps.ui.UIComponent;
 import eu.konggdev.strikemaps.ui.screen.definition.DefinedScreen;
 
@@ -14,28 +14,43 @@ public class AppController {
     private final MainActivity appActivity;
 
     private MapComponent map;
+
     private UIComponent ui;
-    public AppController(MainActivity refActivity) {
-        appActivity = refActivity;
-    }
+
+    private RegistryStorageComponent registry;
+
+
+    public AppController(MainActivity appActivity) { this.appActivity = appActivity;}
+
     public void logcat(String log) {
         appActivity.logcat(log);
     }
+
     public UIComponent getUi() {
         if (ui == null) init();
         return ui;
     }
+
     public MapComponent getMap() {
         if (map == null) init();
         return map;
     }
+
+    public RegistryStorageComponent getRegistry() {
+        if (registry == null) init();
+        return registry;
+    }
+
     public SharedPreferences getPrefs() {
         return getActivity().getSharedPreferences("user_prefs", MODE_PRIVATE);
     }
+
     public AppCompatActivity getActivity() { return appActivity; }
+
     public void init() {
         if (getActivity().getSupportActionBar() != null)
             getActivity().getSupportActionBar().show();
+        if(registry == null) registry = new RegistryStorageComponent(this);
         if(map == null) map = new MapComponent(this);
         if(ui == null) {
             ui = new UIComponent(this, map);

app/src/main/java/eu/konggdev/strikemaps/data/helper/UserPrefsHelper.java

@@ -1,47 +0,0 @@
-package eu.konggdev.strikemaps.data.helper;
-
-import android.content.SharedPreferences;
-
-public final class UserPrefsHelper {
-    private UserPrefsHelper() {} // prevent instantiation
-
-    //Keys
-    private static final String KEY_STARTUP_MAP_STYLE = "startupMapStyle";
-    private static final String KEY_MAP_RENDERER = "mapRenderer";
-    private static final String KEY_PERSIST_LOCATION_ENABLED = "persistLocationEnabled";
-    private static final String KEY_LAST_LOCATION_ENABLED = "lastLocationEnabled";
-
-    //Defaults
-    private static final String DEFAULT_MAP_STYLE = "bundled/style/classic.style.json";
-    private static final Integer DEFAULT_MAP_RENDERER = 0;
-    private static final boolean DEFAULT_PERSIST_LOCATION_ENABLED = true;
-    private static final boolean DEFAULT_LAST_LOCATION_ENABLED = false;
-
-    public static String startupMapStyle(SharedPreferences prefs) {
-        return prefs.getString(KEY_STARTUP_MAP_STYLE, DEFAULT_MAP_STYLE);
-    }
-
-    public static boolean startupMapStyle(SharedPreferences prefs, String updated) {
-        return prefs.edit().putString(KEY_STARTUP_MAP_STYLE, updated).commit();
-    }
-
-    public static Integer mapRenderer(SharedPreferences prefs) {
-        return prefs.getInt(KEY_MAP_RENDERER, DEFAULT_MAP_RENDERER);
-    }
-
-    public static boolean mapRenderer(SharedPreferences prefs, Integer updated) {
-        return prefs.edit().putInt(KEY_MAP_RENDERER, updated).commit();
-    }
-
-    public static boolean persistLocationEnabled(SharedPreferences prefs) {
-        return prefs.getBoolean(KEY_PERSIST_LOCATION_ENABLED, DEFAULT_PERSIST_LOCATION_ENABLED);
-    }
-
-    public static boolean lastLocationEnabled(SharedPreferences prefs) {
-        return prefs.getBoolean(KEY_LAST_LOCATION_ENABLED, DEFAULT_LAST_LOCATION_ENABLED);
-    }
-
-    public static boolean lastLocationEnabled(SharedPreferences prefs, boolean status) {
-        return prefs.edit().putBoolean(KEY_LAST_LOCATION_ENABLED, status).commit();
-    }
-}

app/src/main/java/eu/konggdev/strikemaps/helper/FileHelper.java

@@ -1,17 +1,29 @@
-package eu.konggdev.strikemaps.data.helper;
+package eu.konggdev.strikemaps.helper;
 
 import android.content.res.AssetManager;
-import android.os.Environment;
 
 import java.io.*;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import eu.konggdev.strikemaps.app.AppController;
 
 //FIXME: Ugly
 public final class FileHelper {
+    public static Bitmap getIcon(String iconLocator, AppController app) {
+        switch (iconLocator.split("//")[0]) {
+            //TODO: https
+            case "assets:":
+                return BitmapFactory.decodeStream(FileHelper.openAssetStream("bundled/icon/" + iconLocator.split("//")[1], app));
+            default:
+                app.logcat("Unimplemented icon locator space: " + iconLocator);
+                return null;
+        }
+    }
+
     public static String loadStringFromAssetFile(String filePath, AppController app) {
         try (InputStream is = app.getActivity().getAssets().open(filePath)) {
             int size = is.available();
@@ -24,19 +36,6 @@ public final class FileHelper {
         }
     }
 
-    public static String loadStringFromUserFile(String filePath) {
-        File file = new File(filePath);
-        try (FileInputStream fis = new FileInputStream(file)) {
-            int size = fis.available();
-            byte[] buffer = new byte[size];
-            fis.read(buffer);
-            return new String(buffer, StandardCharsets.UTF_8);
-        } catch (IOException ex) {
-            ex.printStackTrace();
-            return null;
-        }
-    }
-
     public static void writeUserFile(String path, String fileName, String content, AppController app) throws IOException {
         try {
             File userDirectory = new File(app.getActivity().getExternalFilesDir(null), path);
@@ -60,16 +59,6 @@ public final class FileHelper {
         }
     }
 
-    public static boolean deleteFile(String filePath) {
-        File file = new File(filePath);
-
-        if (!file.exists() || !file.isFile()) {
-            return false;
-        }
-
-        return file.delete();
-    }
-
     public static String[] getAssetFiles(String path, String fileExt, AppController app) {
         AssetManager assetManager = app.getActivity().getAssets();
         try {
@@ -109,44 +98,4 @@ public final class FileHelper {
         }
     }
 
-    public static boolean userFileExists(String path, String fileName, AppController app) {
-        File userDirectory = new File(app.getActivity().getExternalFilesDir(null), path);
-
-        if (!userDirectory.exists() || !userDirectory.isDirectory()) {
-            return false;
-        }
-
-        File file = new File(userDirectory, fileName);
-
-        return file.exists() && file.isFile();
-    }
-
-    public static String[] getUserFiles(String path, String fileExt, AppController app) {
-        File userDirectory = new File(app.getActivity().getExternalFilesDir(null), path);
-
-        if (!userDirectory.exists() || !userDirectory.isDirectory())
-            return new String[0];
-
-        File[] files = userDirectory.listFiles(new FilenameFilter() {
-            @Override
-            public boolean accept(File dir, String filename) {
-                if (fileExt == null || fileExt.isEmpty()) {
-                    return true;
-                }
-
-                return filename.toLowerCase().endsWith(fileExt.toLowerCase());
-            }
-        });
-
-        if (files == null || files.length == 0) {
-            return new String[0];
-        }
-
-        List<String> fileList = new ArrayList<>();
-        for (File file : files) {
-            fileList.add(file.getAbsolutePath());
-        }
-
-        return fileList.toArray(new String[0]);
-    }
 }

app/src/main/java/eu/konggdev/strikemaps/helper/UserPrefsHelper.java

@@ -0,0 +1,127 @@
+package eu.konggdev.strikemaps.helper;
+
+import android.content.SharedPreferences;
+import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
+import eu.konggdev.strikemaps.app.AppController;
+import eu.konggdev.strikemaps.map.source.MapSource;
+import eu.konggdev.strikemaps.map.source.MapSource.MapSourceContractType;
+import eu.konggdev.strikemaps.map.source.model.TileSource;
+import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
+import eu.konggdev.strikemaps.map.style.management.StyleManagementMetadata;
+import eu.konggdev.strikemaps.map.style.options.StyleOptions;
+
+import java.lang.reflect.Type;
+import java.util.HashMap;
+import java.util.Map;
+
+public final class UserPrefsHelper {
+    private UserPrefsHelper() {} // prevent instantiation
+
+    //Keys
+    private static final String KEY_STARTUP_MAP_STYLE = "startupMapStyle";
+    private static final String KEY_MAP_RENDERER = "mapRenderer";
+    private static final String KEY_PERSIST_LOCATION_ENABLED = "persistLocationEnabled";
+    private static final String KEY_LAST_LOCATION_ENABLED = "lastLocationEnabled";
+    private static final String KEY_STYLES = "styles";
+    private static final String KEY_SOURCES = "sources";
+
+    //Defaults
+    private static final Integer DEFAULT_MAP_STYLE = 0;
+    private static final Integer DEFAULT_MAP_RENDERER = 0;
+    private static final boolean DEFAULT_PERSIST_LOCATION_ENABLED = true;
+    private static final boolean DEFAULT_LAST_LOCATION_ENABLED = false;
+
+    public static Map<Integer, MapStyle> DEFAULT_STYLES(AppController app) {
+        Map<Integer, MapStyle> styles = new HashMap<>();
+        String[] styleAssets = FileHelper.getAssetFiles("bundled/style", ".style.json", app);
+        for (int i = 0; i < styleAssets.length; i++) { styles.put( i,
+                new MapStyle(
+                        FileHelper.loadStringFromAssetFile(styleAssets[i], app),
+                        new StyleOptions(),
+                        new StyleManagementMetadata()
+                ));
+        }
+        return styles;
+    } //Built-in Styles
+
+    private static final Map<Integer, MapSource> DEFAULT_SOURCES = Map.of(
+            0, new MapSource(
+                    MapSourceContractType.DEFINITION,
+                    "Strike Maps Planet",
+                    new TileSource("https://tiles.strikemaps.eu/planet"),
+                    "vector",
+                    "smts"
+            ),
+            1, new MapSource(
+                    MapSourceContractType.DEFINITION,
+                    "ArcGIS Imagery",
+                    new TileSource(new String[]{"https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}"}),
+                    "raster",
+                    "raster"
+            )
+    ); //Built-in Sources
+
+    public static Integer startupMapStyle(SharedPreferences prefs) {
+        return prefs.getInt(KEY_STARTUP_MAP_STYLE, DEFAULT_MAP_STYLE);
+    }
+
+    public static boolean startupMapStyle(SharedPreferences prefs, Integer updated) {
+        return prefs.edit().putInt(KEY_STARTUP_MAP_STYLE, updated).commit();
+    }
+
+    public static Integer mapRenderer(SharedPreferences prefs) {
+        return prefs.getInt(KEY_MAP_RENDERER, DEFAULT_MAP_RENDERER);
+    }
+
+    public static boolean mapRenderer(SharedPreferences prefs, Integer updated) {
+        return prefs.edit().putInt(KEY_MAP_RENDERER, updated).commit();
+    }
+
+    public static boolean persistLocationEnabled(SharedPreferences prefs) {
+        return prefs.getBoolean(KEY_PERSIST_LOCATION_ENABLED, DEFAULT_PERSIST_LOCATION_ENABLED);
+    }
+
+    public static boolean lastLocationEnabled(SharedPreferences prefs) {
+        return prefs.getBoolean(KEY_LAST_LOCATION_ENABLED, DEFAULT_LAST_LOCATION_ENABLED);
+    }
+
+    public static boolean lastLocationEnabled(SharedPreferences prefs, boolean status) {
+        return prefs.edit().putBoolean(KEY_LAST_LOCATION_ENABLED, status).commit();
+    }
+
+    public static Map<Integer, MapStyle> styles(SharedPreferences prefs, AppController app) {
+        String json = prefs.getString(KEY_STYLES, null);
+        if (json == null) return DEFAULT_STYLES(app);
+        Type type = new TypeToken<Map<Integer, MapStyle.StoredRepresentation>>() {}.getType();
+        Map<Integer, MapStyle.StoredRepresentation> stored =
+                new Gson().fromJson(json, type);
+        Map<Integer, MapStyle> result = new HashMap<>();
+        for (var entry : stored.entrySet())
+            result.put(entry.getKey(), entry.getValue().restore());
+        return result;
+    }
+
+    public static boolean styles(SharedPreferences prefs, Map<Integer, MapStyle> updated) {
+        Map<Integer, MapStyle.StoredRepresentation> stored = new HashMap<>();
+        for (var entry : updated.entrySet())
+            stored.put(entry.getKey(), entry.getValue().makeStoredRepresentation());
+        return prefs.edit()
+                .putString(KEY_STYLES, new Gson().toJson(stored))
+                .commit();
+    }
+
+    public static Map<Integer, MapSource> sources(SharedPreferences prefs) {
+        String json = prefs.getString(KEY_SOURCES, null);
+        if (json == null) return DEFAULT_SOURCES;
+        Type type = new TypeToken<Map<Integer, MapSource>>() {}.getType();
+        return new Gson().fromJson(json, type);
+    }
+
+    public static boolean sources(SharedPreferences prefs, Map<Integer, MapSource> updated) {
+        return prefs.edit()
+                .putString(KEY_SOURCES, new Gson().toJson(updated))
+                .commit();
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/map/MapComponent.java

@@ -5,10 +5,10 @@ import java.util.*;
 import android.widget.Toast;
 import eu.konggdev.strikemaps.Component;
 import eu.konggdev.strikemaps.map.renderer.implementation.MapLibreGLJSRenderer;
-import eu.konggdev.strikemaps.ui.factory.AlertDialogFactory;
-import eu.konggdev.strikemaps.data.helper.UserPrefsHelper;
-import eu.konggdev.strikemaps.map.renderer.implementation.VtmRenderer;
 import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.ui.factory.AlertDialogFactory;
+import eu.konggdev.strikemaps.helper.UserPrefsHelper;
+import eu.konggdev.strikemaps.map.renderer.implementation.VtmRenderer;
 import org.maplibre.android.geometry.LatLng;
 import org.maplibre.geojson.Feature;
 
@@ -19,8 +19,8 @@ import eu.konggdev.strikemaps.map.renderer.MapRenderer;
 import eu.konggdev.strikemaps.ui.fragment.layout.content.main.FragmentLayoutContentMap;
 
 public class MapComponent implements Component {
-    MapRenderer mapRenderer;
-    AppController app;
+    private final MapRenderer mapRenderer;
+    private final AppController app;
 
     public MapStyle style;
     public Map<Class<? extends MapOverlay>, MapOverlay> overlays = new HashMap<>();
@@ -50,7 +50,7 @@ public class MapComponent implements Component {
 
     public void setStyle(MapStyle style) {
         this.style = style;
-        mapRenderer.styleUpdate(style);
+        mapRenderer.styleUpdate(style.effectiveDocument());
     }
 
     public void switchOverlay(MapOverlay overlay) {
@@ -67,14 +67,14 @@ public class MapComponent implements Component {
         return overlays.containsKey(overlay);
     }
 
-    public void selectPoint(Feature selection) {
-        //FIXME: Put back FragmentPointPreviewPopup (private code atm)
-    }
-
     public void overlayUpdate(MapOverlay in) {
         mapRenderer.overlayUpdate(in);
     }
 
+    public void selectPoint(Feature selection) {
+        //FIXME: Put back FragmentPointPreviewPopup (private code atm)
+    }
+
     public boolean onMapClick(LatLng point) {
         List<Feature> features = mapRenderer.featuresAtPoint(point);
 
@@ -99,4 +99,12 @@ public class MapComponent implements Component {
         //TODO: Likely Nonfeature(?) point selection
         return true;
     }
+
+    public void onMapInit() {
+        setStyle(
+                app.getRegistry().getStyle(
+                        UserPrefsHelper.startupMapStyle(app.getPrefs())
+                )
+        );
+    }
 }

app/src/main/java/eu/konggdev/strikemaps/map/offline/download/OfflineDownloader.java

@@ -7,8 +7,8 @@ import java.net.URI;
 public final class OfflineDownloader {
 
     public static String[] fetchAvailableExports(MapSource source) {
-        URI uri = URI.create(source.url);
-        String host = uri.getHost();
+        //URI uri = URI.create(source.url);
+        //String host = uri.getHost();
         return new String[0];
     }
 

app/src/main/java/eu/konggdev/strikemaps/map/overlay/implementation/LocationOverlay.java

@@ -7,7 +7,6 @@ import com.fasterxml.jackson.databind.JsonNode;
 import eu.konggdev.strikemaps.app.AppController;
 import eu.konggdev.strikemaps.map.MapComponent;
 import eu.konggdev.strikemaps.map.overlay.MapOverlay;
-import eu.konggdev.strikemaps.map.source.MapSource;
 
 import eu.konggdev.strikemaps.data.provider.LocationDataProvider;
 

app/src/main/java/eu/konggdev/strikemaps/map/renderer/MapRenderer.java

@@ -3,14 +3,14 @@ package eu.konggdev.strikemaps.map.renderer;
 import android.view.View;
 
 import eu.konggdev.strikemaps.map.overlay.MapOverlay;
-import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
 import org.maplibre.android.geometry.LatLng;
 import org.maplibre.geojson.Feature;
 
 import java.util.List;
 
 public interface MapRenderer {
-    void styleUpdate(MapStyle style);
+    void styleUpdate(StyleDocument style);
 
     void overlayUpdate(MapOverlay overlay);
 

app/src/main/java/eu/konggdev/strikemaps/map/renderer/implementation/MapLibreGLJSRenderer.java

@@ -3,7 +3,6 @@ package eu.konggdev.strikemaps.map.renderer.implementation;
 import android.annotation.SuppressLint;
 import android.view.View;
 import android.view.ViewGroup;
-import android.webkit.ValueCallback;
 import android.webkit.WebChromeClient;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
@@ -18,9 +17,9 @@ import eu.konggdev.strikemaps.app.util.JsonPatcher;
 import eu.konggdev.strikemaps.map.MapComponent;
 import eu.konggdev.strikemaps.map.overlay.MapOverlay;
 import eu.konggdev.strikemaps.map.renderer.MapRenderer;
-import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.source.MapSource;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
 import org.maplibre.android.geometry.LatLng;
-import org.maplibre.android.maps.Style;
 import org.maplibre.geojson.Feature;
 
 import java.util.Collections;
@@ -61,7 +60,7 @@ public class MapLibreGLJSRenderer implements MapRenderer {
     }
 
     @Override
-    public void styleUpdate(MapStyle style) {
+    public void styleUpdate(StyleDocument style) {
         ObjectMapper mapper = new ObjectMapper();
         mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
 
@@ -73,7 +72,8 @@ public class MapLibreGLJSRenderer implements MapRenderer {
                 //Sources
                 ObjectNode sources = mapper.createObjectNode();
                 if (style.sources != null)
-                    style.sources.forEach((k, v) -> sources.set(k, mapper.valueToTree(v)));
+                    for (MapSource source : style.sources)
+                        sources.set(source.name, source.makeJson());
 
                 //Layers
                 ArrayNode layers = mapper.createArrayNode();
@@ -145,5 +145,5 @@ public class MapLibreGLJSRenderer implements MapRenderer {
         return Collections.emptyList();
     }
 
-    class Bridge { }
+    static class Bridge { }
 }

app/src/main/java/eu/konggdev/strikemaps/map/renderer/implementation/MapLibreNativeRenderer.java

@@ -10,10 +10,10 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import eu.konggdev.strikemaps.app.util.JsonPatcher;
-import eu.konggdev.strikemaps.data.helper.UserPrefsHelper;
 import eu.konggdev.strikemaps.map.overlay.MapOverlay;
 import eu.konggdev.strikemaps.map.renderer.MapRenderer;
-import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.source.MapSource;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
 import org.maplibre.android.MapLibre;
 import org.maplibre.android.geometry.LatLng;
 import org.maplibre.android.maps.MapLibreMap;
@@ -32,7 +32,6 @@ public class MapLibreNativeRenderer implements MapRenderer, OnMapReadyCallback {
     @NonNull MapComponent controller;
     MapLibreMap map;
     final MapView mapView;
-
     private JsonNode origin;
 
     public MapLibreNativeRenderer(AppController app, MapComponent controller) {
@@ -45,7 +44,7 @@ public class MapLibreNativeRenderer implements MapRenderer, OnMapReadyCallback {
     }
 
     @Override
-    public void styleUpdate(MapStyle style) {
+    public void styleUpdate(StyleDocument style) {
         ObjectMapper mapper = new ObjectMapper();
         mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
 
@@ -57,7 +56,8 @@ public class MapLibreNativeRenderer implements MapRenderer, OnMapReadyCallback {
                 //Sources
                 ObjectNode sources = mapper.createObjectNode();
                 if (style.sources != null)
-                    style.sources.forEach((k, v) -> sources.set(k, mapper.valueToTree(v)));
+                    for (MapSource source : style.sources)
+                        sources.set(source.name, source.makeJson());
 
                 //Layers
                 ArrayNode layers = mapper.createArrayNode();
@@ -128,7 +128,7 @@ public class MapLibreNativeRenderer implements MapRenderer, OnMapReadyCallback {
     public void onMapReady(@NonNull MapLibreMap maplibreMap) {
         this.map = maplibreMap;
 
-        controller.setStyle(MapStyle.fromFile(UserPrefsHelper.startupMapStyle(app.getPrefs()), app));
+        controller.onMapInit();
 
         //I have my own implementation of attribution that credits MapLibre among others, it's not as bad as it looks :)
         map.getUiSettings().setLogoEnabled(false);

app/src/main/java/eu/konggdev/strikemaps/map/renderer/implementation/VtmRenderer.java

@@ -5,7 +5,7 @@ import eu.konggdev.strikemaps.app.AppController;
 import eu.konggdev.strikemaps.map.MapComponent;
 import eu.konggdev.strikemaps.map.overlay.MapOverlay;
 import eu.konggdev.strikemaps.map.renderer.MapRenderer;
-import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
 import okhttp3.OkHttpClient;
 import org.maplibre.android.geometry.LatLng;
 import org.maplibre.geojson.Feature;
@@ -38,7 +38,7 @@ public class VtmRenderer implements MapRenderer {
     }
 
     @Override
-    public void styleUpdate(MapStyle style) {
+    public void styleUpdate(StyleDocument style) {
         //TODO
         OkHttpClient.Builder builder = new OkHttpClient.Builder();
         OSciMap4TileSource tileSource = OSciMap4TileSource.builder().httpFactory(new OkHttpEngine.OkHttpFactory(builder)).build();

app/src/main/java/eu/konggdev/strikemaps/map/source/MapSource.java

@@ -1,21 +1,139 @@
 package eu.konggdev.strikemaps.map.source;
 
+import androidx.annotation.NonNull;
 import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import eu.konggdev.strikemaps.map.source.model.TileSource;
 
 public class MapSource {
-    public String url;
-    public JsonNode data;
+    public enum MapSourceContractType {
+        REQUEST,
+        DEFINITION
+    }
+
+    /*
+     * Contract describes the "purpose" of the source.
+     *
+     * This exists because we effectively have two types
+     * of sources:
+     *   - Sources that are the style asking for a specific type of source
+     *     and defining a fallback, which is also used as a default for
+     *     
+     * and
+     *   - Sources that are the actual source
+     */
+    @NonNull
+    public final MapSourceContractType contract;
+
+    /*
+     * For a request contract:
+     *  name is the internal key used by the style.
+     *
+     * For a definition contract:
+     *   name is the user-facing source name
+     *   (e.g. "ArcGIS Imagery").
+     *
+     * When converting a request into a definition
+     * (when importing a style whose requests
+     * cannot be satisfied), we look for a name
+     * field and fall back to normalizing the key instead
+     */
+    public String name;
+
+    /*
+     * For a request contract, this is the fallback
+     * for when we absolutely cannot satisfy the requirement,
+     * or the defaults for converting into a definition contract.
+     */
+    public TileSource tileSource;
+
     public String type;
     public String schema;
 
-    public JsonNode tiles;
     public int minzoom;
     public int maxzoom;
+
     public String scheme;
     public int tileSize;
 
-    public String attribution;
-
     public String encoding;
-    public MapSource() { }
+
+    public MapSource(@NonNull MapSourceContractType contract, String name, TileSource tileSource, String type, String schema) {
+        this.contract = contract;
+        this.name = name;
+        this.tileSource = tileSource;
+        this.type = type;
+        this.schema = schema;
+    }
+
+    private MapSource(@NonNull MapSourceContractType contract) {
+        this.contract = contract;
+    }
+
+    public static MapSource fromJson(MapSourceContractType contract, String key, JsonNode sourceNode) {
+        MapSource result = new MapSource(contract);
+        result.name = key;
+
+        result.schema = sourceNode.path("schema").asText(null);
+        result.scheme = sourceNode.path("scheme").asText(null);
+        result.encoding = sourceNode.path("encoding").asText(null);
+        result.type = sourceNode.path("type").asText(null);
+
+        result.minzoom = sourceNode.path("minZoom").asInt(0);
+        result.maxzoom = sourceNode.path("maxZoom").asInt(24);
+        result.tileSize = sourceNode.path("tileSize").asInt(256);
+
+        result.tileSource = handleJsonTileSource(contract, sourceNode);
+
+        return result;
+    }
+
+    private static TileSource handleJsonTileSource(MapSourceContractType contract, JsonNode sourceNode) {
+        // By design, a source must use either "url" or "tiles", never both
+        // In case both are present, we prefer URL over tiles... because I don't know, we just do, m'kay?
+        if (sourceNode.has("url"))
+            return new TileSource(sourceNode.get("url").asText());
+
+        if (sourceNode.has("tiles")) {
+            String[] tiles = new String[0];
+            ObjectMapper mapper = new ObjectMapper();
+
+            try {
+                tiles = mapper.treeToValue(sourceNode.get("tiles"), String[].class);
+            } catch (Exception e) { // If we can't parse it, lets just keep it an empty array
+                e.printStackTrace();
+            }
+
+            return new TileSource(tiles);
+        }
+
+        if (contract == MapSourceContractType.REQUEST) //No tile source is only acceptable for a request contract
+            //TODO: Define an empty tile source?
+            return null;
+
+        //TODO: Decide what to do when we have a definition that doesn't define the most important part - the tile source
+        //Maybe throwing some custom exception, catching it in fromJson calls and propagating it back to the user would be appropriate
+        return null;
+    }
+
+    public ObjectNode makeJson() {
+        ObjectMapper mapper = new ObjectMapper();
+        ObjectNode node = mapper.createObjectNode();
+
+        try {
+            if (type != null) node.put("type", type);
+            if (schema != null) node.put("schema", schema);
+            if (minzoom != 0) node.put("minzoom", minzoom);
+            if (maxzoom != 24) node.put("maxzoom", maxzoom);
+            if (scheme != null) node.put("scheme", scheme);
+            if (tileSize != 256) node.put("tileSize", tileSize);
+            if (encoding != null) node.put("encoding", encoding);
+            if (tileSource != null) tileSource.makeJson(mapper, node);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return node;
+    }
 }

app/src/main/java/eu/konggdev/strikemaps/map/source/model/TileSource.java

@@ -0,0 +1,51 @@
+package eu.konggdev.strikemaps.map.source.model;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+public class TileSource {
+    public enum TileSourceType {
+        URL,
+        TILES,
+        DATA
+    }
+    private TileSourceType type;
+    private String url;
+    private String[] tiles;
+
+    private JsonNode data;
+
+    public TileSource(String url) {
+        this.url = url;
+        this.type = TileSourceType.URL;
+    }
+
+    public TileSource(String[] tiles) {
+        this.tiles = tiles;
+        this.type = TileSourceType.TILES;
+    }
+
+    public TileSource(JsonNode data) {
+        this.data = data;
+        this.type = TileSourceType.DATA;
+    }
+
+    public void makeJson(ObjectMapper mapper, ObjectNode node) {
+        switch (type) {
+            case URL -> node.put("url", url);
+
+            case TILES -> {
+                ArrayNode tilesNode = mapper.createArrayNode();
+
+                for (String tile : tiles)
+                    tilesNode.add(tile);
+
+                node.set("tiles", tilesNode);
+            }
+
+            case DATA -> node.set("data", data);
+        }
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/map/style/MapStyle.java

@@ -1,68 +1,64 @@
 package eu.konggdev.strikemaps.map.style;
 
-import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.node.ObjectNode;
-import com.fasterxml.jackson.databind.node.ArrayNode;
-import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.data.helper.FileHelper;
-import eu.konggdev.strikemaps.map.source.MapSource;
-
-import java.util.*;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
+import eu.konggdev.strikemaps.map.style.management.StyleManagementMetadata;
+import eu.konggdev.strikemaps.map.style.options.StyleOptions;
 
 public class MapStyle {
-    //Only local data
-    public String name;
-    public Bitmap icon;
+    public static final class StoredRepresentation {
+        public final String json;
+        public final StyleOptions options;
 
-    public JsonNode metadata; // everything except layers + sources
-    public Map<String, MapSource> sources;
-    public ArrayNode layerDefinitions;  // "layers" array
+        public final StyleManagementMetadata managementMetadata;
 
-    //FIXME
-    public static MapStyle fromFile(String filename, AppController app) {
-        String styleContents;
-        if (filename.startsWith("/storage")) styleContents = FileHelper.loadStringFromUserFile(filename);
-        else styleContents = FileHelper.loadStringFromAssetFile(filename, app);
+        public StoredRepresentation(String json, StyleOptions options, StyleManagementMetadata managementMetadata) {
+            this.json = json;
+            this.options = options;
+            this.managementMetadata = managementMetadata;
+        }
 
-        ObjectMapper mapper = new ObjectMapper();
-        try {
-            JsonNode root = mapper.readTree(styleContents);
-
-            MapStyle style = new MapStyle();	
-            style.name = root.path("name").asText();
-            style.icon = getIcon(root.path("icon").asText(), app);
-
-            style.sources = mapper.convertValue(
-                    root.path("sources"),
-                    new TypeReference<Map<String, MapSource>>() {}
+        public MapStyle restore() {
+            MapStyle style = new MapStyle(
+                    json,
+                    options,
+                    managementMetadata
             );
 
-            style.layerDefinitions = root.withArray("layers");
-
-            ObjectNode metadata = root.deepCopy();
-            metadata.remove("layers");
-            metadata.remove("sources");
-            style.metadata = metadata;
-
             return style;
-        } catch (Exception e) {
-            e.printStackTrace();
         }
-        return null;
     }
 
-    public static Bitmap getIcon(String iconLocator, AppController app) {
-        switch(iconLocator.split("//")[0]) {
-            //TODO: https
-            case "assets:":
-                return BitmapFactory.decodeStream(FileHelper.openAssetStream("bundled/icon/" + iconLocator.split("//")[1], app));
-            default:
-                app.logcat("Unimplemented icon locator space: " + iconLocator);
-                return null;
-        }
+    @NonNull public final StyleDocument document;
+    @NonNull public final StyleOptions options;
+
+    // Null when the style is not managed
+    @Nullable public StyleManagementMetadata managementMetadata;
+
+    // Original json representation of the style document, as we got it
+    @NonNull public final String json;
+
+
+    public MapStyle(@NonNull String json, @NonNull StyleOptions styleOptions, @Nullable StyleManagementMetadata managementMetadata) {
+        this.json = json;
+        this.document = new StyleDocument(json);
+        this.options = styleOptions;
+        this.managementMetadata = managementMetadata;
+    }
+
+    public MapStyle(@NonNull String json, @NonNull StyleDocument style, @NonNull StyleOptions styleOptions, @Nullable StyleManagementMetadata managementMetadata) {
+        this.json = json;
+        this.document = style;
+        this.options = styleOptions;
+        this.managementMetadata = managementMetadata;
+    }
+
+    public StoredRepresentation makeStoredRepresentation() {
+         return new StoredRepresentation(json, options, managementMetadata);
+    }
+
+    public StyleDocument effectiveDocument() {
+        return document.effectiveDocument(options);
     }
 }

app/src/main/java/eu/konggdev/strikemaps/map/style/document/StyleDocument.java

@@ -0,0 +1,88 @@
+package eu.konggdev.strikemaps.map.style.document;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import eu.konggdev.strikemaps.app.AppController;
+import eu.konggdev.strikemaps.helper.FileHelper;
+import eu.konggdev.strikemaps.map.source.MapSource;
+import eu.konggdev.strikemaps.map.style.options.StyleOptions;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class StyleDocument {
+
+    //Only local data
+    public String name;
+    public String icon;
+
+    public JsonNode metadata; // everything except layers + sources
+    public List<MapSource> sources;
+    public ArrayNode layerDefinitions;  // "layers" array
+
+    // Json constructor
+    public StyleDocument(String json) {
+        ObjectMapper mapper = new ObjectMapper();
+
+        try {
+            JsonNode root = mapper.readTree(json);
+
+            this.name = root.path("name").asText();
+            this.icon = root.path("icon").asText();
+
+            JsonNode jsonSources = root.path("sources");
+            List<MapSource> sources = new ArrayList<>();
+            jsonSources.fields().forEachRemaining(entry -> {
+                sources.add(MapSource.fromJson(MapSource.MapSourceContractType.REQUEST, entry.getKey(), entry.getValue()));
+            });
+            this.sources = sources;
+
+            this.layerDefinitions = root.withArray("layers");
+
+            ObjectNode metadata = root.deepCopy();
+            metadata.remove("layers");
+            metadata.remove("sources");
+            this.metadata = metadata;
+
+        } catch (Exception e) {
+            throw new IllegalArgumentException("Invalid style document", e);
+        }
+    }
+
+    // Copy constructor
+    public StyleDocument(StyleDocument other) {
+        this.name = other.name;
+        this.icon = other.icon;
+        this.metadata = other.metadata.deepCopy();
+        this.sources = new ArrayList<>(other.sources);
+        this.layerDefinitions = other.layerDefinitions.deepCopy();
+    }
+
+    // The style that is presented to the renderer, with its options applied
+    public StyleDocument effectiveDocument(StyleOptions options) {
+        StyleDocument result = new StyleDocument(this); //Copy
+        for (JsonNode layer : result.layerDefinitions) {
+            JsonNode option = layer.get("option");
+
+            if (option == null)
+                continue;
+
+            if ("enable".equals(option.path("type").asText())) {
+                String id = layer.path("id").asText();
+
+                boolean enabled = options.getBoolean(
+                         id,
+                        option.path("default").asBoolean(true)
+                );
+
+
+            }
+        }
+
+        return result;
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/map/style/management/StyleManagementMetadata.java

@@ -0,0 +1,20 @@
+package eu.konggdev.strikemaps.map.style.management;
+
+public class StyleManagementMetadata {
+    public boolean modified;
+    public boolean doUpdates;
+    public boolean autoUpdate;
+
+    public String source;
+    public String sourceHash;
+
+    public StyleManagementMetadata() { }
+
+    public StyleManagementMetadata(boolean modified, boolean doUpdates, boolean autoUpdate, String source, String sourceHash) {
+        this.modified = modified;
+        this.doUpdates = doUpdates;
+        this.autoUpdate = autoUpdate;
+        this.source = source;
+        this.sourceHash = sourceHash;
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/map/style/options/StyleOptions.java

@@ -0,0 +1,30 @@
+package eu.konggdev.strikemaps.map.style.options;
+
+import eu.konggdev.strikemaps.map.source.MapSource;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class StyleOptions {
+    private Map<String, Object> values;
+
+    public StyleOptions() {
+        this.values = new HashMap<>();
+    }
+
+    public StyleOptions(Map<String, Object> values) {
+        this.values = values;
+    }
+
+    public boolean getBoolean(String id, boolean defaultValue) {
+        Object value = values.get(id);
+        return value instanceof Boolean ? (Boolean) value : defaultValue;
+    }
+
+    public int getInteger(String id, int defaultValue) {
+        Object value = values.get(id);
+        return value instanceof Number
+                ? ((Number) value).intValue()
+                : defaultValue;
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/storage/RegistryStorageComponent.java

@@ -0,0 +1,74 @@
+package eu.konggdev.strikemaps.storage;
+
+import eu.konggdev.strikemaps.Component;
+import eu.konggdev.strikemaps.app.AppController;
+import eu.konggdev.strikemaps.map.source.MapSource;
+import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.helper.UserPrefsHelper;
+
+import java.util.Map;
+
+public class RegistryStorageComponent implements Component {
+    private AppController app;
+
+    private Map<Integer, MapStyle> styles;
+
+    private Map<Integer, MapSource> sources;
+
+    public RegistryStorageComponent(AppController app) {
+        this.app = app;
+        styles();
+    }
+
+    private Map<Integer, MapSource> sources() {
+        if (sources == null) sources = UserPrefsHelper.sources(app.getPrefs());
+        return sources;
+    }
+
+    public Map<Integer, MapSource> getSources() {
+        return sources();
+    }
+
+    private Map<Integer, MapStyle> styles() {
+        if (styles == null) styles = UserPrefsHelper.styles(app.getPrefs(), app);
+        return styles;
+    }
+
+    public Map<Integer, MapStyle> getStyles() {
+        return styles();
+    }
+
+    public MapStyle getStyle(Integer id) {
+        return styles().get(id);
+    }
+
+    public int addStyle(MapStyle style) {
+        Map<Integer, MapStyle> styles = styles();
+        int id = styles.keySet().stream()
+                .mapToInt(Integer::intValue)
+                .max()
+                .orElse(-1) + 1;
+
+        styles.put(id, style);
+        save();
+        return id;
+    }
+
+    public void updateStyle(int id, MapStyle style) {
+        styles().put(id, style);
+        save();
+    }
+
+    public void deleteStyle(int id) {
+        styles().remove(id);
+        save();
+    }
+
+    private void save() {
+        UserPrefsHelper.styles(app.getPrefs(), styles);
+    }
+
+    public void checkForUpdates() {
+        //
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/ui/element/item/GenericItem.java

@@ -7,8 +7,10 @@ import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import eu.konggdev.strikemaps.R;
+import eu.konggdev.strikemaps.app.AppController;
+import eu.konggdev.strikemaps.helper.FileHelper;
 import eu.konggdev.strikemaps.map.MapComponent;
-import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.style.document.StyleDocument;
 import eu.konggdev.strikemaps.ui.UIComponent;
 
 public class GenericItem implements UIItem {
@@ -53,19 +55,20 @@ public class GenericItem implements UIItem {
         hasImage = true;
     }
 
-    public final static GenericItem fromStyle(MapStyle style, MapComponent map, Runnable onClick) {
+    public static GenericItem fromStyle(StyleDocument style, AppController app, Runnable onClick) {
         if(style == null) return new GenericItem("Unknown");
         if(style.icon != null)
-            return new GenericItem(style.name, style.icon, onClick);
+            return new GenericItem(style.name, FileHelper.getIcon(style.icon, app), onClick);
         return new GenericItem(style.name, onClick);
     }
-    public final static GenericItem fromStyle(MapStyle style, MapComponent map, Runnable onClick, Runnable onLongClick) {
+    public static GenericItem fromStyle(StyleDocument style, AppController app, Runnable onClick, Runnable onLongClick) {
         if(style == null) return new GenericItem("Unknown");
         if(style.icon != null)
-            return new GenericItem(style.name, style.icon, onClick, onLongClick);
+            return new GenericItem(style.name, FileHelper.getIcon(style.icon, app), onClick, onLongClick);
         return new GenericItem(style.name, onClick, onLongClick);
     }
 
+    @Override
     public View makeView(UIComponent spawner) {
         View v = spawner.inflateUi(R.layout.item_generic);
         //FIXME: These shouldn't be casted like that!

app/src/main/java/eu/konggdev/strikemaps/ui/element/item/InlineItem.java

@@ -3,6 +3,7 @@ package eu.konggdev.strikemaps.ui.element.item;
 import android.view.View;
 import android.widget.TextView;
 import eu.konggdev.strikemaps.R;
+import eu.konggdev.strikemaps.map.source.MapSource;
 import eu.konggdev.strikemaps.ui.UIComponent;
 
 public class InlineItem implements UIItem {
@@ -18,6 +19,15 @@ public class InlineItem implements UIItem {
         this.onClick = onClick;
     }
 
+    public static InlineItem fromSource(MapSource source) {
+        return new InlineItem(source.name);
+    }
+
+    public static InlineItem fromSource(MapSource source, Runnable onClick) {
+        return new InlineItem(source.name, onClick);
+    }
+
+
     @Override
     public View makeView(UIComponent spawner) {
         View view = spawner.inflateUi(R.layout.item_inline);

app/src/main/java/eu/konggdev/strikemaps/ui/element/item/PreviewItem.java

@@ -29,6 +29,8 @@ public class PreviewItem implements UIItem {
     public static PreviewItem fromFeature(Feature feature) {
         return new PreviewItem(feature.getStringProperty("name"), feature.getStringProperty("class"));
     }
+
+    @Override
     public View makeView(UIComponent spawner) {
         View view = spawner.inflateUi(R.layout.item_preview);
         ((TextView) view.findViewById(R.id.choiceName)).setText(name);
@@ -36,6 +38,7 @@ public class PreviewItem implements UIItem {
             ((TextView) view.findViewById(R.id.details)).setText(details);
         return view;
     }
+
     public View makeView(UIComponent spawner, View.OnClickListener onClick) {
         View view = makeView(spawner);
         view.setOnClickListener(onClick);

app/src/main/java/eu/konggdev/strikemaps/ui/element/item/SelectionItem.java

@@ -0,0 +1,12 @@
+package eu.konggdev.strikemaps.ui.element.item;
+
+import android.view.View;
+import eu.konggdev.strikemaps.ui.UIComponent;
+
+public class SelectionItem implements UIItem {
+
+    @Override
+    public View makeView(UIComponent spawner) {
+        return null;
+    }
+}

app/src/main/java/eu/konggdev/strikemaps/ui/factory/AlertDialogFactory.java

@@ -1,64 +1,38 @@
 package eu.konggdev.strikemaps.ui.factory;
 
 import android.app.AlertDialog;
-import android.content.Context;
-import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
-import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
-import android.text.Editable;
-import android.text.TextWatcher;
-import android.view.KeyEvent;
 import android.view.View;
-import android.view.inputmethod.EditorInfo;
-import android.view.inputmethod.InputMethodManager;
 import android.widget.*;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import eu.konggdev.strikemaps.app.AppController;
 import eu.konggdev.strikemaps.app.util.JsonPatcher;
-import eu.konggdev.strikemaps.data.helper.FileHelper;
 import eu.konggdev.strikemaps.map.MapComponent;
 import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.style.options.StyleOptions;
 import eu.konggdev.strikemaps.ui.UIComponent;
-import eu.konggdev.strikemaps.ui.element.item.GenericItem;
 import eu.konggdev.strikemaps.ui.element.item.PreviewItem;
 import eu.konggdev.strikemaps.ui.fragment.popup.FragmentMapChangePopup;
 import org.maplibre.geojson.Feature;
 
-import java.io.IOException;
-import java.util.Arrays;
 import java.util.List;
-import java.util.Locale;
 import java.util.function.Consumer;
 
-import static androidx.core.content.ContextCompat.getSystemService;
 
-//FIXME: Move Item functions into specific classes for specific types - e.g. StyleItem
+//FIXME: Cleaner architecture would be having a class for each AlertDialog type
 public final class AlertDialogFactory {
     public static AlertDialog copyBuiltInStyle(AppController app, MapComponent map, UIComponent ui, FragmentMapChangePopup mapChangePopup) {
-        //TODO: Use an UI element thats supposed to be vertical, instead of GenericItem
-        List<String> styles = Arrays.asList(FileHelper.getAssetFiles("bundled/style", ".style.json", app));
+        //TODO: Use an UI element that's supposed to be vertical, instead of GenericItem
 
         LinearLayout container = new LinearLayout(app.getActivity());
         container.setOrientation(LinearLayout.VERTICAL);
 
-        for (String style : styles) {
-            View itemView = GenericItem
-                    .fromStyle(
-                            MapStyle.fromFile(style, app),
-                            map,
-                            () -> ui.alert(AlertDialogFactory.createStyle(app, FileHelper.loadStringFromAssetFile(style, app), mapChangePopup))
-                    )
-                    .makeView(ui);
-
-            container.addView(itemView);
-        }
-
         ScrollView scrollView = new ScrollView(app.getActivity());
         scrollView.addView(container);
 
@@ -75,15 +49,6 @@ public final class AlertDialogFactory {
         final EditText nameInput = new EditText(app.getActivity());
         nameInput.setHint("Name");
 
-        final CheckBox inferFileName = new CheckBox(app.getActivity());
-        inferFileName.setText("Infer filename automatically");
-        inferFileName.setChecked(true);
-
-        final EditText fileInput = new EditText(app.getActivity());
-        fileInput.setHint("Filename");
-
-        final TextView inferedFileName = new TextView(app.getActivity());
-        inferedFileName.setPadding(0, 2, 0, 0);
         LinearLayout container = new LinearLayout(app.getActivity());
         container.setOrientation(LinearLayout.VERTICAL);
 
@@ -91,38 +56,6 @@ public final class AlertDialogFactory {
         container.setPadding(padding, padding, padding, 0);
 
         container.addView(nameInput);
-        container.addView(inferFileName);
-        container.addView(fileInput);
-        container.addView(inferedFileName);
-
-        inferFileName.setOnCheckedChangeListener((buttonView, isChecked) -> {
-            fileInput.setVisibility(isChecked ? View.GONE : View.VISIBLE);
-            inferedFileName.setVisibility(isChecked ? View.VISIBLE : View.GONE);
-        });
-
-        fileInput.setVisibility(inferFileName.isChecked() ? View.GONE : View.VISIBLE);
-        inferedFileName.setVisibility(inferFileName.isChecked() ? View.VISIBLE : View.GONE);
-
-        nameInput.addTextChangedListener(new TextWatcher() {
-            @Override
-            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
-
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-                String nameText = "";
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.VANILLA_ICE_CREAM) {
-                    if (!s.isEmpty() && s != null) {
-                        nameText = "File name will be: " + s.toString().toLowerCase(Locale.ROOT) + ".style.json";
-                    }
-                } else if (s != null) {
-                    nameText = "File name will be: " + s.toString().toLowerCase(Locale.ROOT) + ".style.json";
-                }
-
-                inferedFileName.setText(nameText);
-            }
-            @Override
-            public void afterTextChanged(Editable s) {}
-        });
 
         AlertDialog dialog = new AlertDialog.Builder(app.getActivity())
                 .setTitle("Create")
@@ -160,21 +93,6 @@ public final class AlertDialogFactory {
 
                 assert !name.isEmpty();
 
-                String fileName;
-                if (inferFileName.isChecked()) {
-                    fileName = name.toLowerCase(Locale.ROOT) + ".style.json";
-                } else {
-                    fileName = fileInput.getText().toString();
-                    if (fileName.isEmpty()) {
-                        fileInput.setError("File name required");
-                        return;
-                    }
-
-                    if (!fileName.endsWith(".style.json")) {
-                        fileInput.setError("File must end with .style.json");
-                        return;
-                    }
-                }
 
                 try {
                     JsonNode root;
@@ -194,12 +112,12 @@ public final class AlertDialogFactory {
                         root = JsonPatcher.patch(root, node);
                     }
 
-                        if (FileHelper.userFileExists("style", fileName, app)) {
-                            app.getUi().alert(askUserOverwriteFile(app, fileName, "style", mapper.writeValueAsString(root), dialog, mapChangePopup));
-                        } else {
-                            FileHelper.writeUserFile("style", fileName, mapper.writeValueAsString(root), app);
-                        }
-                        dialog.dismiss();
+                    app.getRegistry().addStyle(new MapStyle(
+                        mapper.writeValueAsString(root),
+                        new StyleOptions(),
+                        null
+                    ));
+                    dialog.dismiss();
                 } catch (Exception e) {
                     Toast.makeText(app.getActivity(), "Failed to create", Toast.LENGTH_SHORT).show();
                     e.printStackTrace();
@@ -212,46 +130,6 @@ public final class AlertDialogFactory {
         return dialog;
     }
 
-    public static AlertDialog askUserOverwriteFile(AppController app, String fileName, String path, String content, FragmentMapChangePopup mapChangePopup) {
-        return new AlertDialog.Builder(app.getActivity())
-                .setMessage("Style of filename " + fileName + " already exists, do you wish to overwrite it?")
-                .setPositiveButton("Yes", (dialog, which) -> {
-                    try {
-                        FileHelper.writeUserFile(path, fileName, content, app);
-                    } catch (Exception e) {
-                        e.printStackTrace();
-                    }
-                    mapChangePopup.reloadStyles();
-                })
-                .setNegativeButton("No", null)
-                .create();
-    }
-
-    public static AlertDialog askUserOverwriteFile(AppController app, String fileName, String path, String content, AlertDialog originDialog, FragmentMapChangePopup mapChangePopup) {
-        return new AlertDialog.Builder(app.getActivity())
-                .setMessage("Style of filename: " + fileName + " already exists, do you wish to overwrite it?")
-                .setPositiveButton("Yes", (dialog, which) -> {
-                    try {
-                        FileHelper.writeUserFile(path, fileName, content, app);
-                    } catch (IOException e) {
-                        e.printStackTrace();
-                    }
-
-                    if (originDialog != null) {
-                        originDialog.dismiss();
-                    }
-                    mapChangePopup.reloadStyles();
-                    dialog.dismiss();
-                })
-                .setNegativeButton("No", (dialog, which) -> {
-                    if (originDialog != null) {
-                        originDialog.dismiss();
-                    }
-                    dialog.dismiss();
-                })
-                .create();
-    }
-
     public static AlertDialog pointSelector(AppController app, List<Feature> features, Consumer<Feature> callback) {
         LinearLayout layout = new LinearLayout(app.getActivity());
         layout.setOrientation(LinearLayout.VERTICAL);

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/dialog/NewStyleBottomSheet.java

@@ -18,8 +18,9 @@ import com.google.android.material.bottomsheet.BottomSheetDialogFragment;
 import com.google.android.material.card.MaterialCardView;
 import eu.konggdev.strikemaps.R;
 import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.app.util.helper.FileHelper;
 import eu.konggdev.strikemaps.map.MapComponent;
+import eu.konggdev.strikemaps.map.style.MapStyle;
+import eu.konggdev.strikemaps.map.style.options.StyleOptions;
 import eu.konggdev.strikemaps.ui.UIComponent;
 import eu.konggdev.strikemaps.ui.factory.AlertDialogFactory;
 import eu.konggdev.strikemaps.ui.fragment.popup.FragmentMapChangePopup;
@@ -35,7 +36,6 @@ public class NewStyleBottomSheet extends BottomSheetDialogFragment {
     @NonNull
     FragmentMapChangePopup mapChangePopup;
 
-
     private final ActivityResultLauncher<Intent> importLauncher =
             registerForActivityResult(
                     new ActivityResultContracts.StartActivityForResult(),
@@ -79,17 +79,15 @@ public class NewStyleBottomSheet extends BottomSheetDialogFragment {
                                                                 mapChangePopup
                                                         )
                                                 );
-
-                                                return;
                                             } else {
-                                                if (!FileHelper.userFileExists("style", fileName, app)) {
-                                                    FileHelper.writeUserFile("style", fileName, content, app);
-                                                } else {
-                                                    app.getUi().alert(AlertDialogFactory.askUserOverwriteFile(app, fileName, "style", content, mapChangePopup));
-                                                }
-
+                                                app.getRegistry().addStyle(
+                                                        new MapStyle(
+                                                                content,
+                                                                new StyleOptions(),
+                                                                null
+                                                        )
+                                                );
                                                 mapChangePopup.reloadStyles();
-                                                return;
                                             }
                                         }
                                     }
@@ -119,9 +117,7 @@ public class NewStyleBottomSheet extends BottomSheetDialogFragment {
 
     @Nullable
     @Override
-    public View onCreateView(@NonNull LayoutInflater inflater,
-                             @Nullable ViewGroup container,
-                             @Nullable Bundle savedInstanceState) {
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
 
         View view = inflater.inflate(R.layout.dialog_new_style, container, false);
 

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/dialog/StyleDetailsBottomSheet.java

@@ -16,7 +16,6 @@ import com.google.android.material.bottomsheet.BottomSheetDialogFragment;
 import com.google.android.material.card.MaterialCardView;
 import eu.konggdev.strikemaps.R;
 import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.app.util.helper.FileHelper;
 import eu.konggdev.strikemaps.map.MapComponent;
 import eu.konggdev.strikemaps.map.style.MapStyle;
 import eu.konggdev.strikemaps.ui.UIComponent;
@@ -25,7 +24,6 @@ import eu.konggdev.strikemaps.ui.fragment.popup.FragmentMapChangePopup;
 
 import java.io.IOException;
 import java.io.OutputStream;
-import java.util.Objects;
 
 public class StyleDetailsBottomSheet extends BottomSheetDialogFragment {
     @NonNull
@@ -35,82 +33,70 @@ public class StyleDetailsBottomSheet extends BottomSheetDialogFragment {
     @NonNull
     UIComponent ui;
     @NonNull
-    FragmentMapChangePopup mapChangePopup;
+    final FragmentMapChangePopup mapChangePopup;
 
     private final MapStyle style;
-    private final String stylePath;
+    private final Integer id;
 
-    private final ActivityResultLauncher<Intent> exportLauncher =
-            registerForActivityResult(
-                    new ActivityResultContracts.StartActivityForResult(),
-                    result -> {
+    private ActivityResultLauncher<Intent> exportLauncher;
 
-                        if (result.getResultCode() == android.app.Activity.RESULT_OK
-                                && result.getData() != null) {
-
-                            Uri uri = result.getData().getData();
-
-                            try (OutputStream out =
-                                         requireContext()
-                                                 .getContentResolver()
-                                                 .openOutputStream(uri)) {
-
-                                out.write(getContents().getBytes());
-
-                            } catch (IOException e) {
-                                e.printStackTrace();
-                            }
-                        }
-                    }
-            );
-
-    //Action definitions
-    //*//
     void deleteStyle() {
-        boolean deleted = FileHelper.deleteFile(stylePath);
-        if (!deleted) {
-            Toast.makeText(requireContext(), "Failed deleting style", Toast.LENGTH_SHORT).show();
-            return;
-        }
+        app.getRegistry().deleteStyle(id);
 
         mapChangePopup.reloadStyles();
         dismiss();
     }
 
-
-    private void showExportDialog(String fileName) {
+    private void showExportDialog() {
         Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
         intent.setType("application/json");
-        intent.putExtra(Intent.EXTRA_TITLE, fileName);
 
         exportLauncher.launch(intent);
     }
-    //*//
 
-    String getContents() {
-        if (stylePath.startsWith("/storage")) return FileHelper.loadStringFromUserFile(stylePath);
-        else return FileHelper.loadStringFromAssetFile(stylePath, app);
-    }
-
-    public StyleDetailsBottomSheet(AppController app, MapComponent map, UIComponent ui, FragmentMapChangePopup mapChangePopup, MapStyle style, String stylePath) {
+    public StyleDetailsBottomSheet(AppController app, MapComponent map, UIComponent ui, FragmentMapChangePopup mapChangePopup, MapStyle style, Integer id) {
         this.app = app;
         this.map = map;
         this.ui = ui;
         this.mapChangePopup = mapChangePopup;
         this.style = style;
-        this.stylePath = stylePath;
+        this.id = id;
     }
 
-    @Nullable
     @Override
-    public View onCreateView(@NonNull LayoutInflater inflater,
-                             @Nullable ViewGroup container,
-                             @Nullable Bundle savedInstanceState) {
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
 
+        exportLauncher = registerForActivityResult(
+                new ActivityResultContracts.StartActivityForResult(),
+                result -> {
+                    if (result.getResultCode() == android.app.Activity.RESULT_OK
+                            && result.getData() != null) {
+
+                        Uri uri = result.getData().getData();
+
+                        try (OutputStream out =
+                                     requireContext()
+                                             .getContentResolver()
+                                             .openOutputStream(uri)) {
+
+                            if (out != null) {
+                                out.write(style.json.getBytes());
+                            }
+
+                        } catch (IOException e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+        );
+    }
+
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.dialog_style_details, container, false);
 
         TextView styleNameView = view.findViewById(R.id.styleName);
-        TextView fileNameView = view.findViewById(R.id.fileName);
         TextView styleTypeView = view.findViewById(R.id.styleType);
 
         TextView builtInStyleAlert = view.findViewById(R.id.builtInStyleAlert);
@@ -120,27 +106,17 @@ public class StyleDetailsBottomSheet extends BottomSheetDialogFragment {
         MaterialCardView deleteButtonLayout = view.findViewById(R.id.deleteButton);
         MaterialCardView closeButtonLayout = view.findViewById(R.id.closeButton);
 
+        styleNameView.setText(style.document.name);
 
-        styleNameView.setText(style.name);
-
-        String[] pathSplit = stylePath.split("/");
-        String fileName = pathSplit[pathSplit.length - 1];
-
-        fileNameView.setText(fileName);
-
-        if (Objects.equals(pathSplit[0], "bundled") && pathSplit.length > 1) {
+        if (style.managementMetadata != null) {
             styleTypeView.setText("Built-In Style");
-            fileNameView.setVisibility(View.GONE);
-            editButtonLayout.setVisibility(View.GONE);
-            builtInStyleAlert.setVisibility(View.VISIBLE);
-            deleteButtonLayout.setVisibility(View.GONE);
         } else {
             styleTypeView.setText("User Style");
         }
 
-        editButtonLayout.setOnClickListener(v ->  Toast.makeText(requireContext(), "Editor not implemented yet\nWait for release", Toast.LENGTH_SHORT).show());
-        copyButtonLayout.setOnClickListener(v -> ui.alert(AlertDialogFactory.createStyle(app, getContents(), mapChangePopup)));
-        exportButtonLayout.setOnClickListener(v -> showExportDialog(fileName));
+        editButtonLayout.setOnClickListener(v -> Toast.makeText(requireContext(), "Editor not implemented yet\nWait for release", Toast.LENGTH_SHORT).show());
+        copyButtonLayout.setOnClickListener(v -> ui.alert(AlertDialogFactory.createStyle(app, style.json, mapChangePopup)));
+        exportButtonLayout.setOnClickListener(v -> showExportDialog());
         deleteButtonLayout.setOnClickListener(v -> deleteStyle());
         closeButtonLayout.setOnClickListener(v -> dismiss());
 

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/layout/FragmentLayoutControls.java

@@ -15,7 +15,7 @@ import android.widget.Toast;
 
 import eu.konggdev.strikemaps.R;
 import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.data.helper.UserPrefsHelper;
+import eu.konggdev.strikemaps.helper.UserPrefsHelper;
 import eu.konggdev.strikemaps.map.overlay.implementation.LocationOverlay;
 import eu.konggdev.strikemaps.ui.fragment.popup.FragmentMapChangePopup;
 

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/layout/FragmentLayoutSearch.java

@@ -39,8 +39,6 @@ public class FragmentLayoutSearch extends Fragment implements Layout {
     public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-
-
         setupButton(view, R.id.hamburgerButton, click(() -> {
 
             View menuView = getLayoutInflater().inflate(R.layout.dropdown_main, null);
@@ -80,43 +78,6 @@ public class FragmentLayoutSearch extends Fragment implements Layout {
                 int popupWidth = menuView.getMeasuredWidth();
                 int containerWidth = anchor.getWidth();
 
-                int xOffset = containerWidth - popupWidth;
-                popupWindow.showAsDropDown(anchor, xOffset, 1);
-            });
-
-        }));
-
-        setupButton(view, R.id.offlineMapsButton, click(() -> {
-            View offlineMapsPopupView = getLayoutInflater().inflate(R.layout.dropdown_offline, null);
-
-            PopupWindow popupWindow = new PopupWindow(
-                    offlineMapsPopupView,
-                    ViewGroup.LayoutParams.WRAP_CONTENT,
-                    ViewGroup.LayoutParams.WRAP_CONTENT,
-                    true
-            );
-
-            popupWindow.setOutsideTouchable(true);
-            popupWindow.setFocusable(true);
-            popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
-
-            View anchor = view.findViewById(R.id.searchContainer);
-
-            setupButton(offlineMapsPopupView, R.id.offlineMaps, click(() -> {
-                popupWindow.dismiss();
-                app.getUi().swapScreen(DefinedScreen.OFFLINE);
-            }));
-
-            anchor.post(() -> {
-
-                offlineMapsPopupView.measure(
-                        View.MeasureSpec.UNSPECIFIED,
-                        View.MeasureSpec.UNSPECIFIED
-                );
-
-                int popupWidth = offlineMapsPopupView.getMeasuredWidth();
-                int containerWidth = anchor.getWidth();
-
                 int xOffset = containerWidth - popupWidth;
                 popupWindow.showAsDropDown(anchor, xOffset, 1);
             });

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/layout/content/main/FragmentLayoutContentOfflineMaps.java

@@ -2,23 +2,10 @@ package eu.konggdev.strikemaps.ui.fragment.layout.content.main;
 
 import android.os.Bundle;
 import android.view.View;
-import android.widget.LinearLayout;
-import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import eu.konggdev.strikemaps.R;
 import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.data.helper.FileHelper;
-import eu.konggdev.strikemaps.map.source.MapSource;
-import eu.konggdev.strikemaps.map.style.MapStyle;
-import eu.konggdev.strikemaps.ui.element.item.GenericItem;
-import eu.konggdev.strikemaps.ui.element.item.InlineItem;
-import eu.konggdev.strikemaps.ui.element.item.PreviewItem;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Objects;
 
 public class FragmentLayoutContentOfflineMaps extends Fragment implements MainContentLayout {
     @NonNull AppController app;
@@ -37,24 +24,9 @@ public class FragmentLayoutContentOfflineMaps extends Fragment implements MainCo
     public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        List<MapSource> sources = new ArrayList<>();
 
-        List<String> stylePaths = new ArrayList<>();
-        stylePaths.addAll(Arrays.asList(FileHelper.getAssetFiles("bundled/style", ".style.json", app)));
-        stylePaths.addAll(Arrays.asList(FileHelper.getUserFiles("style", ".style.json", app)));
-        /* Parsing an entire MapStyle is absolutely unnecessary and resource wasteful
-           TODO: A method should be implemented to parse a List<MapSource> directly from the JSON */
-        for (String stylePath : stylePaths) {
-            MapStyle parsedStyle = MapStyle.fromFile(stylePath, app);
-            sources.addAll(parsedStyle.sources.values());
-        }
-
-        LinearLayout sourcesLayout = view.findViewById(R.id.llDownloadContainer);
-        for (MapSource source : sources) {
-            if (!Objects.equals(source.type, "raster"))
-                sourcesLayout.addView(new InlineItem(source.url, () -> Toast.makeText(app.getActivity(), "Work in progress", Toast.LENGTH_SHORT).show()).makeView(app.getUi()));
-            else
-                sourcesLayout.addView(new InlineItem(source.tiles.toString(), () -> Toast.makeText(app.getActivity(), "Work in progress", Toast.LENGTH_SHORT).show()).makeView(app.getUi()));
-        }
+//        LinearLayout sourcesLayout = view.findViewById(R.id.llDownloadContainer);
+//        for (MapSource source : sources)
+//            sourcesLayout.addView(new InlineItem(source.name, () -> Toast.makeText(app.getActivity(), "Work in progress", Toast.LENGTH_SHORT).show()).makeView(app.getUi()));
     }
 }

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/layout/content/main/FragmentLayoutContentSettings.java

@@ -1,6 +1,5 @@
 package eu.konggdev.strikemaps.ui.fragment.layout.content.main;
 
-import android.app.ActionBar;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.AdapterView;
@@ -8,17 +7,12 @@ import android.widget.Spinner;
 import android.widget.ArrayAdapter;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.Fragment;
-import com.google.android.material.appbar.MaterialToolbar;
 import eu.konggdev.strikemaps.R;
-import eu.konggdev.strikemaps.data.helper.UserPrefsHelper;
+import eu.konggdev.strikemaps.helper.UserPrefsHelper;
 import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.map.MapComponent;
 import eu.konggdev.strikemaps.ui.factory.AlertDialogFactory;
 
-import java.util.Arrays;
-
 
 public class FragmentLayoutContentSettings extends Fragment implements MainContentLayout {
     @NonNull AppController app;

app/src/main/java/eu/konggdev/strikemaps/ui/fragment/popup/FragmentMapChangePopup.java

@@ -1,17 +1,20 @@
 package eu.konggdev.strikemaps.ui.fragment.popup;
 
+import android.annotation.SuppressLint;
+import android.content.res.ColorStateList;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.Color;
 import android.os.Bundle;
 import android.view.View;
 
+import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import android.widget.LinearLayout;
 
 import eu.konggdev.strikemaps.R;
 import eu.konggdev.strikemaps.app.AppController;
-import eu.konggdev.strikemaps.data.helper.FileHelper;
 import eu.konggdev.strikemaps.map.MapComponent;
 
 import eu.konggdev.strikemaps.map.style.MapStyle;
@@ -20,10 +23,7 @@ import eu.konggdev.strikemaps.ui.fragment.dialog.NewStyleBottomSheet;
 import eu.konggdev.strikemaps.ui.fragment.dialog.StyleDetailsBottomSheet;
 import eu.konggdev.strikemaps.ui.element.item.GenericItem;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
+import java.util.Map;
 
 public class FragmentMapChangePopup extends Fragment implements Popup {
     @NonNull AppController app;
@@ -34,16 +34,65 @@ public class FragmentMapChangePopup extends Fragment implements Popup {
 
     private View view;
 
-    // Action definitions
-    //*//
+    Map<Integer, Integer> tabs =  Map.of(
+            R.id.stylesTab, R.id.styles,
+            R.id.optionsTab, R.id.options,
+            R.id.overlaysTab, R.id.overlays
+    );
+
+    Map<Integer, Runnable> tabLoadActions = Map.of(
+            R.id.stylesTab, this::reloadStyles,
+            R.id.optionsTab, this::loadStyleOptions,
+            R.id.overlaysTab, this::reloadOverlays
+    );
+
+    public void reloadStyles() {
+        LinearLayout stylesLayout = view.findViewById(R.id.stylesLayout);
+        stylesLayout.removeAllViews();
+        app.getRegistry().getStyles().forEach((id, style) ->
+                stylesLayout.addView(GenericItem.fromStyle(style.document, app,
+                        () -> map.setStyle(style),
+                        () -> this.styleDetails(style, id)).makeView(ui))
+        );
+        Bitmap addNewIcon = BitmapFactory.decodeResource(app.getActivity().getResources(), android.R.drawable.ic_menu_add);
+        stylesLayout.addView(new GenericItem("",
+                addNewIcon,
+                this::newStyleFlow).makeView(ui));
+    }
+
+    public void loadStyleOptions() {
+        LinearLayout optionsLayout = view.findViewById(R.id.optionsLayout);
+//        optionsLayout.removeAllViews();
+//        TextView sources = new AppCompatTextView(requireContext()) {{
+//            setText("Sources");
+//            setTextSize(16);
+//            setLayoutParams(new ViewGroup.MarginLayoutParams(
+//                    ViewGroup.LayoutParams.WRAP_CONTENT,
+//                    ViewGroup.LayoutParams.WRAP_CONTENT
+//            ) {{ leftMargin = 16; }});
+//        }};
+//        optionsLayout.addView(sources);
+
+//        for (MapSource source : map.style.sources) {
+//            LinearLayout sourceSelectionLayout = new LinearLayout(requireContext());
+//            TextView sourceName = new TextView(requireContext());
+//            sourceName.setText(source.name);
+//            sourceSelectionLayout.addView(sourceName);
+//            optionsLayout.addView(sourceSelectionLayout);
+//        }
+    }
+
+    public void reloadOverlays() {
+
+    }
+
     void newStyleFlow() {
         new NewStyleBottomSheet(app, map, ui, this).show(app.getActivity().getSupportFragmentManager(), "NewStyleBottomSheet");
     }
 
-    void styleDetails(MapStyle style, String stylePath) {
-        new StyleDetailsBottomSheet(app, map, ui, this, style, stylePath).show(app.getActivity().getSupportFragmentManager(), "StyleDetailsBottomSheet");
+    void styleDetails(MapStyle entry, Integer id) {
+        new StyleDetailsBottomSheet(app, map, ui, this, entry, id).show(app.getActivity().getSupportFragmentManager(), "StyleDetailsBottomSheet");
     }
-    //*//
 
     public FragmentMapChangePopup(AppController app, Integer region) {
         super(R.layout.popup_map_change);
@@ -63,30 +112,30 @@ public class FragmentMapChangePopup extends Fragment implements Popup {
         return this;
     }
 
-    public void reloadStyles() {
-        List<String> stylePaths = new ArrayList<>();
-        stylePaths.addAll(Arrays.asList(FileHelper.getAssetFiles("bundled/style", ".style.json", app)));
-        stylePaths.addAll(Arrays.asList(FileHelper.getUserFiles("style", ".style.json", app)));
-        LinearLayout stylesLayout = view.findViewById(R.id.stylesLayout);
-        stylesLayout.removeAllViews();
-        for (String stylePath : stylePaths) {
-            MapStyle parsedStyle = MapStyle.fromFile(stylePath, app);
-            stylesLayout.addView(GenericItem.fromStyle(parsedStyle, map,
-                    () -> map.setStyle(parsedStyle),
-                    () -> this.styleDetails(parsedStyle, stylePath)).makeView(ui));
-        }
-        Bitmap addNewIcon = BitmapFactory.decodeResource(app.getActivity().getResources(), android.R.drawable.ic_menu_add);
-        stylesLayout.addView(new GenericItem("",
-                addNewIcon,
-                this::newStyleFlow).makeView(ui));
+    @SuppressLint("UseCompatTextViewDrawableApis")
+    void switchTab(int target) {
+        tabs.forEach((button, content) -> {
+            view.findViewById(content).setVisibility(button == target ? View.VISIBLE : View.GONE);
+            int color = (button == target
+                    ? Color.WHITE
+                    : Color.parseColor("#888888"));
+            ((TextView) view.findViewById(button)).setTextColor(color);
+            ((TextView) view.findViewById(button)).setCompoundDrawableTintList(ColorStateList.valueOf(color));
+        });
+        tabLoadActions.get(target).run();
     }
 
     @Override
     public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
         //FIXME
+        this.view = view;
+
+        tabs.keySet().forEach(button -> {
+            view.findViewById(button).setOnClickListener(v -> switchTab(button));
+        });
+
+        switchTab(R.id.stylesTab); // Show styles
         setupButton(view, R.id.closeButton, click(() -> ui.getCurrentScreen().closePopup()));
         setupDragHandle(view, view, () -> ui.getCurrentScreen().closePopup());
-        this.view = view;
-        reloadStyles();
     }
 }

app/src/main/res/THIRD_PARTY_NOTICES.md

@@ -0,0 +1,16 @@
+The following files included inside the /res/drawable folder are derived from Google Material Icons and are subject to the Apache License, Version 2.0:
+
+* `ic_sliders.xml`
+* `ic_bubble.xml`
+* `ic_stack.xml`
+* `ic_clarify.xml`
+* 
+The following files included inside the /res/drawable folder are copies of Google Material Icons and are subject to the Apache License, Version 2.0:
+
+* `ic_file.xml`
+* `ic_offline.xml`
+* `ic_arrow_forward.xml`
+* `ic_hide.bmp`
+* `ic_dropdown.xml`
+
+Unless otherwise noted in this file, all other files included in the `res` folder are subject to the standard license of this project

app/src/main/res/drawable/ic_arrow_forward.xml

@@ -1,10 +1,5 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24"
-        android:viewportHeight="24"
-        android:tint="?attr/colorControlNormal">
-    <path
-            android:fillColor="#FFFFFF"
-            android:pathData="M12,4l-1.41,1.41L16.17,11H4v2h12.17l-5.58,5.59L12,20l8,-8z" />
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="960" android:viewportWidth="960" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M400,680L400,280L600,480L400,680Z"/>
+    
 </vector>

app/src/main/res/drawable/ic_bubble.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="18dp" android:tint="#000000" android:viewportHeight="960" android:viewportWidth="960" android:width="18dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M619.5,148.5Q685,177 734,226Q783,275 811.5,340.5Q840,406 840,480Q840,554 811.5,619.5Q783,685 734,734Q685,783 619.5,811.5Q554,840 480,840Q439,840 401,831Q363,822 325,805L386,744Q409,752 432.5,756Q456,760 480,760Q596,760 678,678Q760,596 760,480Q760,364 678,282Q596,200 480,200Q364,200 282,282Q200,364 200,480Q200,504 204,527.5Q208,551 216,574L156,634Q138,598 129,559.5Q120,521 120,480Q120,406 148.5,340.5Q177,275 226,226Q275,177 340.5,148.5Q406,120 480,120Q554,120 619.5,148.5ZM520,640L520,496L176,840L120,784L464,440L320,440L320,360L600,360L600,640L520,640Z"/>
+
+</vector>

app/src/main/res/drawable/ic_clarify.xml

@@ -0,0 +1,17 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="18dp"
+        android:height="18dp"
+        android:tint="#000000"
+        android:viewportWidth="960"
+        android:viewportHeight="960">
+
+    <group
+            android:translateY="-40">
+
+        <path
+                android:fillColor="@android:color/white"
+                android:pathData="M240,680L520,680L520,600L240,600L240,680ZM640,680L720,680L720,280L640,280L640,680ZM240,520L520,520L520,440L240,440L240,520ZM240,360L520,360L520,280L240,280L240,360ZM160,840Q127,840 103.5,816.5Q80,793 80,760L80,200Q80,167 103.5,143.5Q127,120 160,120L800,120Q833,120 856.5,143.5Q880,167 880,200L880,760Q880,793 856.5,816.5Q833,840 800,840L160,840ZM160,760L800,760Q800,760 800,760Q800,760 800,760L800,200Q800,200 800,200Q800,200 800,200L160,200Q160,200 160,200Q160,200 160,200L160,760Q160,760 160,760Q160,760 160,760ZM160,760L160,760Q160,760 160,760Q160,760 160,760L160,200Q160,200 160,200Q160,200 160,200L160,200Q160,200 160,200Q160,200 160,200L160,760Q160,760 160,760Q160,760 160,760Z" />
+
+    </group>
+
+</vector>

app/src/main/res/drawable/ic_copy.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24"
+        android:viewportHeight="24"
+        android:tint="?attr/colorControlNormal">
+    <path
+            android:fillColor="@android:color/white"
+            android:pathData="M16,1H4C2.9,1 2,1.9 2,3v14h2V3h12V1zM19,5H8C6.9,5 6,5.9 6,7v14c0,1.1 0.9,2 2,2h11c1.1,0 2,-0.9 2,-2V7C21,5.9 20.1,5 19,5zM19,21H8V7h11V21z"/>
+</vector>

app/src/main/res/drawable/ic_dropdown.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="960" android:viewportWidth="960" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M480,600L280,400L680,400L480,600Z"/>
+    
+</vector>

app/src/main/res/drawable/ic_help.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="16dp"
+        android:height="16dp"
+        android:viewportWidth="24"
+        android:viewportHeight="24">
+    <path
+            android:fillColor="#FFFFFF"
+            android:pathData="M11.07,12.85c0.77,-1.39 2.25,-2.21 3.11,-3.44 0.91,-1.29 0.4,-3.7 -2.18,-3.7 -1.69,0 -2.52,1.28 -2.87,2.34L6.54,6.96C7.25,4.83 9.18,3 11.99,3c2.35,0 3.96,1.07 4.78,2.41 0.7,1.15 1.11,3.3 0.03,4.9 -1.2,1.77 -2.35,2.31 -2.97,3.45 -0.25,0.46 -0.35,0.76 -0.35,2.24h-2.89C10.58,15.22 10.46,13.95 11.07,12.85zM14,20c0,1.1 -0.9,2 -2,2s-2,-0.9 -2,-2 0.9,-2 2,-2 2,0.9 2,2z"/>
+</vector>

app/src/main/res/drawable/ic_sliders.xml

@@ -0,0 +1,24 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="960"
+        android:viewportHeight="960"
+        android:tint="#000000">
+
+    <group
+            android:pivotX="480"
+            android:pivotY="480"
+            android:scaleX="1.15"
+            android:scaleY="1.15"
+            android:translateX="-80"
+            android:translateY="40">
+
+        <path
+                android:fillColor="@android:color/white"
+                android:pathData="M300,600L360,600L360,440L300,440L300,490L240,490L240,550L300,550L300,600Z
+                M400,550L720,550L720,490L400,490L400,550Z
+                M600,440L660,440L660,390L720,390L660,330L660,280L600,280L600,440Z
+                M240,390L560,390L560,330L240,330L240,390Z" />
+    </group>
+
+</vector>

app/src/main/res/drawable/ic_stack.xml

@@ -0,0 +1,17 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="18dp"
+        android:height="18dp"
+        android:tint="#000000"
+        android:viewportWidth="960"
+        android:viewportHeight="960">
+
+    <group
+            android:translateY="-40">
+
+        <path
+                android:fillColor="@android:color/white"
+                android:pathData="M80,880L80,800L880,800L880,880L80,880ZM280,440L280,320L680,320L680,440L280,440ZM280,680L280,560L680,560L680,680L280,680Z" />
+
+    </group>
+
+</vector>

app/src/main/res/layout/dialog_style_details.xml

@@ -20,19 +20,6 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
-    <TextView
-            android:id="@+id/fileName"
-            android:layout_width="wrap_content"
-            android:layout_height="27dp"
-            android:layout_marginTop="4dp"
-            android:gravity="center"
-            android:text="\?.style.json"
-            android:textColor="#BDBDBD"
-            android:textSize="18sp"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/styleName" />
-
     <TextView
             android:id="@+id/styleType"
             android:layout_width="112dp"
@@ -44,7 +31,7 @@
             android:textSize="18sp"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/fileName" />
+            app:layout_constraintTop_toBottomOf="@id/styleName" />
 
     <TextView
             android:id="@+id/builtInStyleAlert"

app/src/main/res/layout/dropdown_offline.xml

@@ -1,34 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-                                                   android:layout_width="match_parent"
-                                                   android:layout_height="match_parent">
-
-    <com.google.android.material.card.MaterialCardView
-            xmlns:android="http://schemas.android.com/apk/res/android"
-            xmlns:app="http://schemas.android.com/apk/res-auto"
-            android:layout_width="200dp"
-            android:layout_height="wrap_content"
-            app:cardCornerRadius="12dp"
-            app:cardElevation="12dp"
-            app:cardBackgroundColor="#000000">
-
-        <LinearLayout
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:orientation="vertical"
-                android:padding="8dp">
-
-            <TextView
-                    android:id="@+id/offlineMaps"
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:padding="12dp"
-                    android:text="Offline Maps"
-                    android:textColor="#FFFFFF"
-                    android:background="?android:attr/selectableItemBackground"/>
-
-        </LinearLayout>
-
-    </com.google.android.material.card.MaterialCardView>
-
-</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/fragment_search.xml

@@ -25,17 +25,6 @@
                 android:queryHint="Search..."
                 android:background="@android:color/transparent" />
 
-        <ImageButton
-                android:id="@+id/offlineMapsButton"
-                android:layout_width="wrap_content"
-                android:layout_height="match_parent"
-                android:background="@android:color/transparent"
-                android:contentDescription="Offline Maps"
-                android:src="@drawable/ic_offline"
-                android:padding="6dp"
-                android:scaleType="fitCenter"
-                app:tint="#B0B0B0" />
-
         <ImageButton
                 android:id="@+id/hamburgerButton"
                 android:layout_width="wrap_content"

app/src/main/res/layout/item_selection.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/selectionName"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/currentSelection"
+            android:drawableEnd="@drawable/ic_dropdown"
+            android:drawablePadding="4dp"
+            android:drawableTint="@android:color/white"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/popup_map_change.xml

@@ -2,6 +2,7 @@
 <androidx.constraintlayout.widget.ConstraintLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
+        xmlns:tools="http://schemas.android.com/tools"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="#000000"
@@ -19,41 +20,183 @@
     <ImageButton
             android:id="@+id/closeButton"
             android:layout_width="30dp"
-            android:layout_height="30dp"
+            android:layout_height="27dp"
             android:backgroundTint="#000000"
             app:srcCompat="@android:drawable/ic_menu_close_clear_cancel"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintEnd_toEndOf="parent" />
 
-    <TextView
-            android:id="@+id/stylesLabel"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:text="Styles"
-            android:textColor="#FFFFFF"
-            android:textSize="18sp"
+    <androidx.constraintlayout.widget.ConstraintLayout
+            android:id="@+id/tabs"
+            android:layout_width="match_parent"
+            android:layout_height="28dp"
             android:layout_marginTop="16dp"
-            app:layout_constraintTop_toTopOf="parent"
+            android:layout_marginBottom="2dp"
+            app:layout_constraintTop_toBottomOf="@id/dragHandle"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintEnd_toEndOf="parent" />
+            app:layout_constraintEnd_toEndOf="parent">
 
-    <HorizontalScrollView
-            android:id="@+id/styles"
+        <TextView
+                android:id="@+id/stylesTab"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:gravity="center_vertical"
+                android:text="Style"
+                android:textAllCaps="false"
+                android:textSize="16sp"
+                android:textStyle="bold"
+                android:textColor="@android:color/white"
+                android:clickable="true"
+                android:focusable="true"
+                android:layout_marginEnd="8dp"
+                android:background="?attr/selectableItemBackground"
+                android:drawableStart="@drawable/ic_bubble"
+                android:drawablePadding="6dp"
+                android:drawableTint="@android:color/white"
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintEnd_toStartOf="@id/optionsTab"
+                app:layout_constraintHorizontal_chainStyle="packed" />
+
+        <TextView
+                android:id="@+id/optionsTab"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:gravity="center_vertical"
+                android:text="Options"
+                android:textAllCaps="false"
+                android:textSize="16sp"
+                android:textStyle="bold"
+                android:textColor="#888888"
+                android:clickable="true"
+                android:focusable="true"
+                android:layout_marginStart="8dp"
+                android:layout_marginEnd="8dp"
+                android:background="?attr/selectableItemBackground"
+                android:drawableStart="@drawable/ic_sliders"
+                android:drawablePadding="2dp"
+                android:drawableTint="#888888"
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintStart_toEndOf="@id/stylesTab"
+                app:layout_constraintEnd_toStartOf="@id/overlaysTab" />
+
+        <TextView
+                android:id="@+id/overlaysTab"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:gravity="center_vertical"
+                android:text="Overlays"
+                android:textAllCaps="false"
+                android:textSize="16sp"
+                android:textStyle="bold"
+                android:textColor="#888888"
+                android:clickable="true"
+                android:focusable="true"
+                android:layout_marginStart="8dp"
+                android:background="?attr/selectableItemBackground"
+                android:drawableStart="@drawable/ic_stack"
+                android:drawablePadding="4dp"
+                android:drawableTint="#888888"
+                app:layout_constraintTop_toTopOf="parent"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintStart_toEndOf="@id/optionsTab"
+                app:layout_constraintEnd_toEndOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <FrameLayout
+            android:id="@+id/tabContent"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_marginTop="8dp"
-            app:layout_constraintTop_toBottomOf="@id/stylesLabel"
+            app:layout_constraintTop_toBottomOf="@id/tabs"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintBottom_toBottomOf="parent">
+            app:layout_constraintBottom_toBottomOf="parent" >
+
+        <!-- Styles tab -->
 
         <LinearLayout
-                android:id="@+id/stylesLayout"
-                android:layout_width="wrap_content"
+                android:id="@+id/styles"
+                android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:orientation="horizontal" />
-    </HorizontalScrollView>
+                android:orientation="vertical">
 
-    <!-- Sources selection to be implemented here -->
+            <HorizontalScrollView
+                    android:id="@+id/stylesScrollView"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="2dp"
+                    android:fillViewport="false">
+
+                <LinearLayout
+                        android:id="@+id/stylesLayout"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:orientation="horizontal" />
+
+            </HorizontalScrollView>
+
+        </LinearLayout>
+
+        <!-- Options tab -->
+        <ScrollView
+                android:id="@+id/options"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:visibility="gone">
+
+            <LinearLayout
+                    android:id="@+id/optionsLayout"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical">
+
+
+                <androidx.constraintlayout.widget.ConstraintLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content" >
+
+                    <TextView
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:text="Sources"
+                            app:layout_constraintStart_toStartOf="parent"
+                            app:layout_constraintTop_toTopOf="parent"
+                            android:layout_marginStart="12dp" />
+                    
+                </androidx.constraintlayout.widget.ConstraintLayout>
+
+
+                  <LinearLayout
+                        android:id="@+id/sourcesLayout"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:orientation="vertical" />
+
+            </LinearLayout>
+
+        </ScrollView>
+
+        <!-- Overlays tab -->
+        <ScrollView
+                android:id="@+id/overlays"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:visibility="gone">
+
+            <LinearLayout
+                    android:id="@+id/overlaysLayout"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical" >
+
+            </LinearLayout>
+
+        </ScrollView>
+
+    </FrameLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>