Core: Move scrollParent into its own module

Ref #9647

ui/core.js

@@ -32,6 +32,7 @@
 			"./safe-active-element",
 			"./safe-blur",
 			"./tabbable",
+			"./scroll-parent",
 			"./version"
 		], factory );
 	} else {
@@ -43,20 +44,6 @@
 
 // plugins
 $.fn.extend( {
-	scrollParent: function( includeHidden ) {
-		var position = this.css( "position" ),
-			excludeStaticParent = position === "absolute",
-			overflowRegex = includeHidden ? /(auto|scroll|hidden)/ : /(auto|scroll)/,
-			scrollParent = this.parents().filter( function() {
-				var parent = $( this );
-				if ( excludeStaticParent && parent.css( "position" ) === "static" ) {
-					return false;
-				}
-				return overflowRegex.test( parent.css( "overflow" ) + parent.css( "overflow-y" ) + parent.css( "overflow-x" ) );
-			} ).eq( 0 );
-
-		return position === "fixed" || !scrollParent.length ? $( this[ 0 ].ownerDocument || document ) : scrollParent;
-	},
 
 	uniqueId: ( function() {
 		var uuid = 0;

ui/dialog.js

@@ -22,6 +22,7 @@
 		// AMD. Register as an anonymous module.
 		define( [
 			"jquery",
+			"./core",
 			"./version",
 			"./keycode",
 			"./widget",

ui/draggable.js

@@ -20,12 +20,12 @@
 		// AMD. Register as an anonymous module.
 		define([
 			"jquery",
-			"./core",
 			"./data",
 			"./mouse",
 			"./plugin",
 			"./safe-active-element",
 			"./safe-blur",
+			"./scroll-parent",
 			"./version",
 			"./widget"
 		], factory );

ui/scroll-parent.js

@@ -0,0 +1,42 @@
+/*!
+ * jQuery UI Scroll Parent @VERSION
+ * http://jqueryui.com
+ *
+ * Copyright jQuery Foundation and other contributors
+ * Released under the MIT license.
+ * http://jquery.org/license
+ */
+
+//>>label: scrollParent
+//>>group: Core
+//>>description: Get the closest ancestor element that is scrollable.
+//>>docs: http://api.jqueryui.com/scrollParent/
+
+( function( factory ) {
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [ "jquery", "./version" ], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery );
+	}
+} ( function( $ ) {
+
+return $.fn.scrollParent = function( includeHidden ) {
+	var position = this.css( "position" ),
+		excludeStaticParent = position === "absolute",
+		overflowRegex = includeHidden ? /(auto|scroll|hidden)/ : /(auto|scroll)/,
+		scrollParent = this.parents().filter( function() {
+			var parent = $( this );
+			if ( excludeStaticParent && parent.css( "position" ) === "static" ) {
+				return false;
+			}
+			return overflowRegex.test( parent.css( "overflow" ) + parent.css( "overflow-y" ) + parent.css( "overflow-x" ) );
+		} ).eq( 0 );
+
+	return position === "fixed" || !scrollParent.length ? $( this[ 0 ].ownerDocument || document ) : scrollParent;
+};
+
+} ) );

ui/sortable.js

@@ -22,9 +22,10 @@
 			"jquery",
 			"./core",
 			"./data",
+			"./version",
 			"./ie",
 			"./mouse",
-			"./version",
+			"./scroll-parent",
 			"./widget"
 		], factory );
 	} else {