Add ol.geom.LineString#appendCoordinate

src/ol/geom/linestring.exports

@@ -1,4 +1,5 @@
 @exportSymbol ol.geom.LineString
+@exportProperty ol.geom.LineString.prototype.appendCoordinate
 @exportProperty ol.geom.LineString.prototype.clone
 @exportProperty ol.geom.LineString.prototype.getCoordinateAtM
 @exportProperty ol.geom.LineString.prototype.getCoordinates

src/ol/geom/linestring.js

@@ -1,5 +1,7 @@
 goog.provide('ol.geom.LineString');
 
+goog.require('goog.array');
+goog.require('goog.asserts');
 goog.require('ol.extent');
 goog.require('ol.geom.GeometryType');
 goog.require('ol.geom.SimpleGeometry');
@@ -50,6 +52,20 @@ ol.geom.LineString = function(coordinates, opt_layout) {
 goog.inherits(ol.geom.LineString, ol.geom.SimpleGeometry);
 
 
+/**
+ * @param {ol.Coordinate} coordinate Coordinate.
+ */
+ol.geom.LineString.prototype.appendCoordinate = function(coordinate) {
+  goog.asserts.assert(coordinate.length == this.stride);
+  if (goog.isNull(this.flatCoordinates)) {
+    this.flatCoordinates = coordinate.slice();
+  } else {
+    goog.array.extend(this.flatCoordinates, coordinate);
+  }
+  this.dispatchChangeEvent();
+};
+
+
 /**
  * @inheritDoc
  */

test/spec/ol/geom/linestring.test.js

@@ -37,6 +37,13 @@ describe('ol.geom.LineString', function() {
       expect(lineString.getStride()).to.be(2);
     });
 
+    it('can append coordinates', function() {
+      lineString.appendCoordinate([1, 2]);
+      expect(lineString.getCoordinates()).to.eql([[1, 2]]);
+      lineString.appendCoordinate([3, 4]);
+      expect(lineString.getCoordinates()).to.eql([[1, 2], [3, 4]]);
+    });
+
   });
 
   describe('construct with 2D coordinates', function() {