refactoring

Logic/FeatureSource/Sources/ClippedFeatureSource.ts

@@ -0,0 +1,17 @@
+import FeatureSource from "../FeatureSource"
+import { Feature, Polygon } from "geojson"
+import StaticFeatureSource from "./StaticFeatureSource"
+import { GeoOperations } from "../../GeoOperations"
+
+/**
+ * Returns a clipped version of the original geojson. Ways which partially intersect the given feature will be split up
+ */
+export default class ClippedFeatureSource extends StaticFeatureSource {
+    constructor(features: FeatureSource, clipTo: Feature<Polygon>) {
+        super(
+            features.features.mapD((features) => {
+                return [].concat(features.map((feature) => GeoOperations.clipWith(feature, clipTo)))
+            })
+        )
+    }
+}