Move the slowInSlowOut easing function into utils

core/modules/macros/scrollable.js

@@ -65,10 +65,6 @@ exports.postRenderInDom = function() {
 	};
 };
 
-var slowInSlowOut = function(t) {
-	return (1 - ((Math.cos(t * Math.PI) + 1) / 2));
-};
-
 exports.scrollTo = function(bounds) {
 	this.cancelScroll();
 	this.startTime = new Date();
@@ -84,7 +80,7 @@ exports.scrollTo = function(bounds) {
 				self.cancelScroll();
 				t = 1;
 			}
-			t = slowInSlowOut(t);
+			t = $tw.utils.slowInSlowOut(t);
 			self.child.domNode.scrollLeft = self.startX + (self.endX - self.startX) * t;
 			self.child.domNode.scrollTop = self.startY + (self.endY - self.startY) * t;
 		}, 10);

core/modules/utils/dom/scroller.js

@@ -12,10 +12,6 @@ Module that creates a $tw.utils.Scroller object prototype that manages scrolling
 /*global $tw: false */
 "use strict";
 
-var slowInSlowOut = function(t) {
-	return (1 - ((Math.cos(t * Math.PI) + 1) / 2));
-};
-
 /*
 Creates a Scroller object
 */
@@ -67,7 +63,7 @@ Scroller.prototype.scrollIntoView = function(domNode) {
 				self.cancel();
 				t = 1;
 			}
-			t = slowInSlowOut(t);
+			t = $tw.utils.slowInSlowOut(t);
 			window.scrollTo(self.startX + (self.endX - self.startX) * t,self.startY + (self.endY - self.startY) * t);
 		}, 10);
 	}

core/modules/utils/utils.js

@@ -88,6 +88,10 @@ exports.extendDeepCopy = function(object,extendedProperties) {
 	return result;
 };
 
+exports.slowInSlowOut = function(t) {
+	return (1 - ((Math.cos(t * Math.PI) + 1) / 2));
+};
+
 exports.formatDateString = function (date,template) {
 	var t = template.replace(/0hh12/g,$tw.utils.pad($tw.utils.getHours12(date)));
 	t = t.replace(/hh12/g,$tw.utils.getHours12(date));