rotation support for ol.View#calculateExtent

src/ol/view.js

@@ -275,15 +275,17 @@ ol.View.prototype.getHints = function() {
  * @api stable
  */
 ol.View.prototype.calculateExtent = function(size) {
-  goog.asserts.assert(this.isDef(),
-      'the view was not defined (had no center and/or resolution)');
   var center = this.getCenter();
+  goog.asserts.assert(goog.isDefAndNotNull(center),
+      'The view center is not defined');
   var resolution = this.getResolution();
-  var minX = center[0] - resolution * size[0] / 2;
-  var maxX = center[0] + resolution * size[0] / 2;
-  var minY = center[1] - resolution * size[1] / 2;
-  var maxY = center[1] + resolution * size[1] / 2;
-  return [minX, minY, maxX, maxY];
+  goog.asserts.assert(goog.isDef(resolution),
+      'The view resolution is not defined');
+  var rotation = this.getRotation();
+  goog.asserts.assert(goog.isDef(rotation),
+      'The view rotation is not defined');
+
+  return ol.extent.getForViewAndSize(center, resolution, rotation, size);
 };
 
 

test/spec/ol/view.test.js

@@ -364,6 +364,35 @@ describe('ol.View', function() {
     });
   });
 
+  describe('#calculateExtent', function() {
+    it('returns the expect extent', function() {
+      var view = new ol.View({
+        resolutions: [512],
+        zoom: 0,
+        center: [0, 0]
+      });
+
+      var extent = view.calculateExtent([100, 200]);
+      expect(extent[0]).to.be(-25600);
+      expect(extent[1]).to.be(-51200);
+      expect(extent[2]).to.be(25600);
+      expect(extent[3]).to.be(51200);
+    });
+    it('returns the expected extent with rotation', function() {
+      var view = new ol.View({
+        resolutions: [512],
+        zoom: 0,
+        center: [0, 0],
+        rotation: Math.PI / 2
+      });
+      var extent = view.calculateExtent([100, 200]);
+      expect(extent[0]).to.roughlyEqual(-51200, 1e-9);
+      expect(extent[1]).to.roughlyEqual(-25600, 1e-9);
+      expect(extent[2]).to.roughlyEqual(51200, 1e-9);
+      expect(extent[3]).to.roughlyEqual(25600, 1e-9);
+    });
+  });
+
   describe('fit', function() {
     var view;
     beforeEach(function() {