Respect disableClusteringAtZoom when adding individual layers

src/MarkerCluster.js

@@ -107,8 +107,9 @@ L.MarkerCluster = L.Marker.extend({
 	//  false: wasn't able to put this marker in
 	//  a MarkerCluster: the visible parent of the marker
 	_recursivelyAddLayer: function (layer, zoom) {
-		var map = this._group._map,
-			maxClusterRadius = this._group.options.maxClusterRadius,
+		var group = this._group,
+			map = group._map,
+			maxClusterRadius = group.options.maxClusterRadius,
 			result = false,
 			i;
 
@@ -127,6 +128,9 @@ L.MarkerCluster = L.Marker.extend({
 		//Couldn't add it to a child, but it should be part of us (this._zoom -> we are the root node)
 		if (!result && (this._canAcceptPosition(layer.getLatLng(), zoom) || ('_zoom' in this))) {
 
+			//If we are allowed to cluster at our childs level
+			if (zoom + 1 !== group.options.disableClusteringAtZoom) {
+
 				//Add to ourself instead
 				var layerPos = map.project(layer.getLatLng(), zoom + 1),
 				    sqDist = this._group._sqDist;
@@ -141,7 +145,7 @@ L.MarkerCluster = L.Marker.extend({
 						break;
 					}
 				}
-
+			}
 			//result = distanceGrid.getNearObject(map.project(layer.getLatLng(), zoom + 1));
 
 			if (result) {
@@ -158,6 +162,11 @@ L.MarkerCluster = L.Marker.extend({
 					maxZoom = map.getMaxZoom(),
 					newResult,
 					finalResult = (zoom === wantedZoom) ? result : true;
+
+				if (group.options.disableClusteringAtZoom) {
+					maxZoom = group.options.disableClusteringAtZoom - 2;
+				}
+
 				while (zoom < maxZoom) {
 					zoom++;