Add ol.geom.Polygon#appendLinearRing

src/ol/geom/polygon.exports

@@ -1,4 +1,5 @@
 @exportSymbol ol.geom.Polygon
+@exportProperty ol.geom.Polygon.prototype.appendLinearRing
 @exportProperty ol.geom.Polygon.prototype.clone
 @exportProperty ol.geom.Polygon.prototype.getArea
 @exportProperty ol.geom.Polygon.prototype.getCoordinates

src/ol/geom/polygon.js

@@ -1,5 +1,6 @@
 goog.provide('ol.geom.Polygon');
 
+goog.require('goog.array');
 goog.require('goog.asserts');
 goog.require('ol.extent');
 goog.require('ol.geom.GeometryType');
@@ -71,6 +72,21 @@ ol.geom.Polygon = function(coordinates, opt_layout) {
 goog.inherits(ol.geom.Polygon, ol.geom.SimpleGeometry);
 
 
+/**
+ * @param {ol.geom.LinearRing} linearRing Linear ring.
+ */
+ol.geom.Polygon.prototype.appendLinearRing = function(linearRing) {
+  goog.asserts.assert(linearRing.getLayout() == this.layout);
+  if (goog.isNull(this.flatCoordinates)) {
+    this.flatCoordinates = linearRing.getFlatCoordinates().slice();
+  } else {
+    goog.array.extend(this.flatCoordinates, linearRing.getFlatCoordinates());
+  }
+  this.ends_.push(this.flatCoordinates.length);
+  this.dispatchChangeEvent();
+};
+
+
 /**
  * @inheritDoc
  */

test/spec/ol/geom/polygon.test.js

@@ -37,6 +37,17 @@ describe('ol.geom.Polygon', function() {
       expect(polygon.getStride()).to.be(2);
     });
 
+    it('can append linear rings', function() {
+      polygon.appendLinearRing(
+          new ol.geom.LinearRing([[1, 2], [3, 4], [5, 6]]));
+      expect(polygon.getCoordinates()).to.eql(
+          [[[1, 2], [3, 4], [5, 6]]]);
+      polygon.appendLinearRing(
+          new ol.geom.LinearRing([[7, 8], [9, 10], [11, 12]]));
+      expect(polygon.getCoordinates()).to.eql(
+          [[[1, 2], [3, 4], [5, 6]], [[7, 8], [9, 10], [11, 12]]]);
+    });
+
   });
 
   describe('construct with 2D coordinates', function() {