Lazily create KML style defaults

src/ol/format/kmlformat.js

@@ -65,7 +65,8 @@ ol.format.KML = function(opt_options) {
    * @type {Array.<ol.style.Style>}
    */
   this.defaultStyle_ = options.defaultStyle ?
-      options.defaultStyle : ol.format.KML.DEFAULT_STYLE_ARRAY_;
+      options.defaultStyle :
+      (ol.format.KML.DEFAULT_STYLE_ARRAY_ || ol.format.KML.createStyleDefaults_());
 
   /**
    * @private
@@ -139,6 +140,11 @@ ol.format.KML.SCHEMA_LOCATION_ = 'http://www.opengis.net/kml/2.2 ' +
     'https://developers.google.com/kml/schema/kml22gx.xsd';
 
 
+/**
+ * @return {Array.<ol.style.Style>} Default style.
+ * @private
+ */
+ol.format.KML.createStyleDefaults_ = function() {
   /**
    * @const
    * @type {ol.Color}
@@ -146,7 +152,6 @@ ol.format.KML.SCHEMA_LOCATION_ = 'http://www.opengis.net/kml/2.2 ' +
    */
   ol.format.KML.DEFAULT_COLOR_ = [255, 255, 255, 1];
 
-
   /**
    * @const
    * @type {ol.style.Fill}
@@ -156,7 +161,6 @@ ol.format.KML.DEFAULT_FILL_STYLE_ = new ol.style.Fill({
     color: ol.format.KML.DEFAULT_COLOR_
   });
 
-
   /**
    * @const
    * @type {ol.Size}
@@ -164,7 +168,6 @@ ol.format.KML.DEFAULT_FILL_STYLE_ = new ol.style.Fill({
    */
   ol.format.KML.DEFAULT_IMAGE_STYLE_ANCHOR_ = [20, 2]; // FIXME maybe [8, 32] ?
 
-
   /**
    * @const
    * @type {ol.style.IconAnchorUnits}
@@ -173,7 +176,6 @@ ol.format.KML.DEFAULT_IMAGE_STYLE_ANCHOR_ = [20, 2]; // FIXME maybe [8, 32] ?
   ol.format.KML.DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS_ =
       ol.style.IconAnchorUnits.PIXELS;
 
-
   /**
    * @const
    * @type {ol.style.IconAnchorUnits}
@@ -182,7 +184,6 @@ ol.format.KML.DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS_ =
   ol.format.KML.DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS_ =
       ol.style.IconAnchorUnits.PIXELS;
 
-
   /**
    * @const
    * @type {ol.Size}
@@ -190,7 +191,6 @@ ol.format.KML.DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS_ =
    */
   ol.format.KML.DEFAULT_IMAGE_STYLE_SIZE_ = [64, 64];
 
-
   /**
    * @const
    * @type {string}
@@ -199,7 +199,6 @@ ol.format.KML.DEFAULT_IMAGE_STYLE_SIZE_ = [64, 64];
   ol.format.KML.DEFAULT_IMAGE_STYLE_SRC_ =
       'https://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png';
 
-
   /**
    * @const
    * @type {number}
@@ -207,7 +206,6 @@ ol.format.KML.DEFAULT_IMAGE_STYLE_SRC_ =
    */
   ol.format.KML.DEFAULT_IMAGE_SCALE_MULTIPLIER_ = 0.5;
 
-
   /**
    * @const
    * @type {ol.style.Image}
@@ -225,7 +223,6 @@ ol.format.KML.DEFAULT_IMAGE_STYLE_ = new ol.style.Icon({
     src: ol.format.KML.DEFAULT_IMAGE_STYLE_SRC_
   });
 
-
   /**
    * @const
    * @type {ol.style.Stroke}
@@ -236,7 +233,6 @@ ol.format.KML.DEFAULT_STROKE_STYLE_ = new ol.style.Stroke({
     width: 1
   });
 
-
   /**
    * @const
    * @type {ol.style.Stroke}
@@ -247,7 +243,6 @@ ol.format.KML.DEFAULT_TEXT_STROKE_STYLE_ = new ol.style.Stroke({
     width: 2
   });
 
-
   /**
    * @const
    * @type {ol.style.Text}
@@ -260,7 +255,6 @@ ol.format.KML.DEFAULT_TEXT_STYLE_ = new ol.style.Text({
     scale: 0.8
   });
 
-
   /**
    * @const
    * @type {ol.style.Style}
@@ -274,7 +268,6 @@ ol.format.KML.DEFAULT_STYLE_ = new ol.style.Style({
     zIndex: 0
   });
 
-
   /**
    * @const
    * @type {Array.<ol.style.Style>}
@@ -282,6 +275,9 @@ ol.format.KML.DEFAULT_STYLE_ = new ol.style.Style({
    */
   ol.format.KML.DEFAULT_STYLE_ARRAY_ = [ol.format.KML.DEFAULT_STYLE_];
 
+  return ol.format.KML.DEFAULT_STYLE_ARRAY_;
+};
+
 
 /**
  * @const