Add switch to hide certain features, cleanup of code

Customizations/JSON/LayerConfig.ts

@@ -24,6 +24,7 @@ export default class LayerConfig {
     static WAYHANDLING_DEFAULT = 0;
     static WAYHANDLING_CENTER_ONLY = 1;
     static WAYHANDLING_CENTER_AND_WAY = 2;
+    
     id: string;
     name: Translation
     description: Translation;
@@ -31,6 +32,7 @@ export default class LayerConfig {
     calculatedTags: [string, string][]
     doNotDownload: boolean;
     passAllFeatures: boolean;
+    isShown: TagRenderingConfig;
     minzoom: number;
     maxzoom: number;
     title?: TagRenderingConfig;
@@ -205,6 +207,7 @@ export default class LayerConfig {
                 throw "Builtin SVG asset not found: " + iconPath
             }
         }
+        this.isShown = tr("isShown", "yes");
         this.iconSize = tr("iconSize", "40,40,center");
         this.color = tr("color", "#0000ff");
         this.width = tr("width", "7");

Customizations/JSON/LayerConfigJson.ts

@@ -1,5 +1,6 @@
 import {TagRenderingConfigJson} from "./TagRenderingConfigJson";
 import {AndOrTagConfigJson} from "./TagConfigJson";
+import TagRenderingConfig from "./TagRenderingConfig";
 
 /**
  * Configuration for a single layer
@@ -51,7 +52,15 @@ export interface LayerConfigJson {
      * Works well together with 'passAllFeatures', to add decoration
      */
     doNotDownload?: boolean;
-    
+
+    /**
+     * This tagrendering should either be 'yes' or 'no'. If 'no' is returned, then the feature will be hidden from view.
+     * This is useful to hide certain features from view
+     * The default value is 'yes'
+     */
+    isShown?: TagRenderingConfigJson;
+
+
     /**
      * The zoomlevel at which point the data is shown and loaded.
      * Default: 0