Break the circular dependency: overview map, map, controls, overview map

src/ol/control/util.js

@@ -0,0 +1,61 @@
+import Collection from '../Collection.js';
+import Attribution from './Attribution.js';
+import Rotate from './Rotate.js';
+import Zoom from './Zoom.js';
+
+
+/**
+ * @typedef {Object} DefaultsOptions
+ * @property {boolean} [attribution=true] Include
+ * {@link module:ol/control/Attribution~Attribution}.
+ * @property {module:ol/control/Attribution~Options} [attributionOptions]
+ * Options for {@link module:ol/control/Attribution~Attribution}.
+ * @property {boolean} [rotate=true] Include
+ * {@link module:ol/control/Rotate~Rotate}.
+ * @property {module:ol/control/Rotate~Options} [rotateOptions] Options
+ * for {@link module:ol/control/Rotate~Rotate}.
+ * @property {boolean} [zoom] Include {@link module:ol/control/Zoom~Zoom}.
+ * @property {module:ol/control/Zoom~Options} [zoomOptions] Options for
+ * {@link module:ol/control/Zoom~Zoom}.
+ * @api
+ */
+
+
+/**
+ * Set of controls included in maps by default. Unless configured otherwise,
+ * this returns a collection containing an instance of each of the following
+ * controls:
+ * * {@link module:ol/control/Zoom~Zoom}
+ * * {@link module:ol/control/Rotate~Rotate}
+ * * {@link module:ol/control/Attribution~Attribution}
+ *
+ * @param {module:ol/control/util~DefaultsOptions=} opt_options
+ * Defaults options.
+ * @return {module:ol/Collection.<module:ol/control/Control>}
+ * Controls.
+ * @api
+ */
+export function defaults(opt_options) {
+
+  const options = opt_options ? opt_options : {};
+
+  const controls = new Collection();
+
+  const zoomControl = options.zoom !== undefined ? options.zoom : true;
+  if (zoomControl) {
+    controls.push(new Zoom(options.zoomOptions));
+  }
+
+  const rotateControl = options.rotate !== undefined ? options.rotate : true;
+  if (rotateControl) {
+    controls.push(new Rotate(options.rotateOptions));
+  }
+
+  const attributionControl = options.attribution !== undefined ?
+    options.attribution : true;
+  if (attributionControl) {
+    controls.push(new Attribution(options.attributionOptions));
+  }
+
+  return controls;
+}