Add ol.geom.MultiLineString#setLineStrings

src/ol/geom/multilinestring.js

@@ -1,5 +1,7 @@
 goog.provide('ol.geom.MultiLineString');
 
+goog.require('goog.array');
+goog.require('goog.asserts');
 goog.require('ol.extent');
 goog.require('ol.geom.LineString');
 goog.require('ol.geom.SimpleGeometry');
@@ -163,3 +165,26 @@ ol.geom.MultiLineString.prototype.setFlatCoordinates =
   this.ends_ = ends;
   this.dispatchChangeEvent();
 };
+
+
+/**
+ * @param {Array.<ol.geom.LineString>} lineStrings LineStrings.
+ */
+ol.geom.MultiLineString.prototype.setLineStrings = function(lineStrings) {
+  var layout = ol.geom.GeometryLayout.XY;
+  var flatCoordinates = [];
+  var ends = [];
+  var i, ii;
+  for (i = 0, ii = lineStrings.length; i < ii; ++i) {
+    var lineString = lineStrings[i];
+    if (i === 0) {
+      layout = lineString.getLayout();
+    } else {
+      // FIXME better handle the case of non-matching layouts
+      goog.asserts.assert(lineString.getLayout() == layout);
+    }
+    goog.array.extend(flatCoordinates, lineString.getFlatCoordinates());
+    ends.push(flatCoordinates.length);
+  }
+  this.setFlatCoordinates(layout, flatCoordinates, ends);
+};

test/spec/ol/geom/multilinestring.test.js

@@ -168,8 +168,25 @@ describe('ol.geom.MultiLineString', function() {
 
   });
 
+  describe('#setLineStrings', function() {
+
+    it('sets the line strings', function() {
+      var multiLineString = new ol.geom.MultiLineString(null);
+      var lineString1 = new ol.geom.LineString([[1, 2], [3, 4]]);
+      var lineString2 = new ol.geom.LineString([[5, 6], [7, 8]]);
+      multiLineString.setLineStrings([lineString1, lineString2]);
+      expect(multiLineString.getFlatCoordinates()).to.eql(
+          [1, 2, 3, 4, 5, 6, 7, 8]);
+      expect(multiLineString.getEnds()).to.eql([4, 8]);
+      var coordinates = multiLineString.getCoordinates();
+      expect(coordinates[0]).to.eql(lineString1.getCoordinates());
+      expect(coordinates[1]).to.eql(lineString2.getCoordinates());
+    });
+  });
+
 });
 
 
 goog.require('ol.extent');
+goog.require('ol.geom.LineString');
 goog.require('ol.geom.MultiLineString');