LinearRing.getCentroid: return null if the geometry has no components. r=pgiraud (closes #2530)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10116 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
2010-03-19 09:05:12 +00:00
parent c54dc76d15
commit 37e0c0b4f5
2 changed files with 22 additions and 3 deletions
@@ -190,7 +190,7 @@ OpenLayers.Geometry.LinearRing = OpenLayers.Class(
     * {<OpenLayers.Geometry.Point>} The centroid of the collection
     */
    getCentroid: function() {
-        if ( this.components && (this.components.length > 2)) {
+        if (this.components && (this.components.length > 2)) {
            var sumX = 0.0;
            var sumY = 0.0;
            for (var i = 0; i < this.components.length - 1; i++) {
@@ -202,8 +202,10 @@ OpenLayers.Geometry.LinearRing = OpenLayers.Class(
            var area = -1 * this.getArea();
            var x = sumX / (6 * area);
            var y = sumY / (6 * area);
+            return new OpenLayers.Geometry.Point(x, y);
+        } else {
+            return null;
        }
-        return new OpenLayers.Geometry.Point(x, y);
    },

    /**