Add snap interaction

src/interaction/RSnap.tsx

@@ -0,0 +1,26 @@
+import {default as Snap} from 'ol/interaction/Snap';
+import {default as RBaseInteraction} from './RBaseInteraction';
+
+/**
+ * @propsfor RSnap
+ */
+export interface RSnapProps {
+     /** Snap tolerance in pixels
+     * @default 10 */
+     pixelTolerance?: number;
+}
+
+/** Snap */
+export default class RSnap extends RBaseInteraction<RSnapProps> {
+    protected static classProps = ['pixelToleranc'];
+    ol: Snap;
+
+    createOL(props: RSnapProps): Snap {
+        this.classProps = RSnap.classProps;
+        return new Snap(
+            Object.keys(props)
+                .filter((p) => this.classProps.includes(p))
+                .reduce((ac, p) => ({...ac, [p]: props[p]}), {})
+        );
+    }
+}

src/interaction/index.ts

@@ -13,3 +13,4 @@ export {default as RPinchRotate} from './RPinchRotate';
 export {default as RPinchZoom} from './RPinchZoom';
 export {default as RKeyboardPan} from './RKeyboardPan';
 export {default as RKeyboardZoom} from './RKeyboardZoom';
+export {default as RSnap} from './RSnap';