Adding original properties to cloned geometry

src/ol/geom/Circle.js

@@ -37,7 +37,13 @@ class Circle extends SimpleGeometry {
    * @api
    */
   clone() {
-    return new Circle(this.flatCoordinates.slice(), undefined, this.layout);
+    const circle = new Circle(
+      this.flatCoordinates.slice(),
+      undefined,
+      this.layout
+    );
+    circle.importPropertiesFrom(this);
+    return circle;
   }
 
   /**

src/ol/geom/Geometry.js

@@ -109,6 +109,17 @@ class Geometry extends BaseObject {
     return abstract();
   }
 
+  /**
+   * Import properties from another geometry.
+   * @param {Geometry} geometry Source geometry.
+   * @protected
+   */
+  importPropertiesFrom(geometry) {
+    if (geometry.hasProperties()) {
+      this.setProperties(geometry.getProperties(), true);
+    }
+  }
+
   /**
    * @abstract
    * @param {number} x X.

src/ol/geom/GeometryCollection.js

@@ -69,6 +69,7 @@ class GeometryCollection extends Geometry {
   clone() {
     const geometryCollection = new GeometryCollection(null);
     geometryCollection.setGeometries(this.geometries_);
+    geometryCollection.importPropertiesFrom(this);
     return geometryCollection;
   }
 

src/ol/geom/LineString.js

@@ -87,7 +87,12 @@ class LineString extends SimpleGeometry {
    * @api
    */
   clone() {
-    return new LineString(this.flatCoordinates.slice(), this.layout);
+    const lineString = new LineString(
+      this.flatCoordinates.slice(),
+      this.layout
+    );
+    lineString.importPropertiesFrom(this);
+    return lineString;
   }
 
   /**

src/ol/geom/MultiLineString.js

@@ -102,11 +102,13 @@ class MultiLineString extends SimpleGeometry {
    * @api
    */
   clone() {
-    return new MultiLineString(
+    const multiLineString = new MultiLineString(
       this.flatCoordinates.slice(),
       this.layout,
       this.ends_.slice()
     );
+    multiLineString.importPropertiesFrom(this);
+    return multiLineString;
   }
 
   /**

src/ol/geom/MultiPoint.js

@@ -61,6 +61,7 @@ class MultiPoint extends SimpleGeometry {
       this.flatCoordinates.slice(),
       this.layout
     );
+    multiPoint.importPropertiesFrom(this);
     return multiPoint;
   }
 

src/ol/geom/MultiPolygon.js

@@ -155,11 +155,14 @@ class MultiPolygon extends SimpleGeometry {
       newEndss[i] = this.endss_[i].slice();
     }
 
-    return new MultiPolygon(
+    const multiPolygon = new MultiPolygon(
       this.flatCoordinates.slice(),
       this.layout,
       newEndss
     );
+    multiPolygon.importPropertiesFrom(this);
+
+    return multiPolygon;
   }
 
   /**

src/ol/geom/Point.js

@@ -30,6 +30,7 @@ class Point extends SimpleGeometry {
    */
   clone() {
     const point = new Point(this.flatCoordinates.slice(), this.layout);
+    point.importPropertiesFrom(this);
     return point;
   }
 

src/ol/geom/Polygon.js

@@ -118,11 +118,13 @@ class Polygon extends SimpleGeometry {
    * @api
    */
   clone() {
-    return new Polygon(
+    const polygon = new Polygon(
       this.flatCoordinates.slice(),
       this.layout,
       this.ends_.slice()
     );
+    polygon.importPropertiesFrom(this);
+    return polygon;
   }
 
   /**