Add ol.structs.RBush#isEmpty

2013-12-04 14:48:21 +01:00
parent a836d6924d
commit d5e5749967
2 changed files with 42 additions and 0 deletions
--- a/src/ol/structs/rbush.js
+++ b/src/ol/structs/rbush.js
@@ -574,6 +574,14 @@ ol.structs.RBush.prototype.insert_ = function(extent, value, level) {
 };


+/**
+ * @return {boolean} Is empty.
+ */
+ol.structs.RBush.prototype.isEmpty = function() {
+  return this.root_.children.length === 0;
+};
+
+
 /**
 * @param {T} value Value.
 */