Core: Move focusable into its own module

Ref #9647

1 files changed, 2 insertions, 34 deletions

diff --git a/ui/core.js b/ui/core.js
index 1072e89f1..a0931dffa 100644
--- a/ui/core.js
+++ b/ui/core.js
@@ -22,6 +22,7 @@
 			"jquery",
 			"./data",
 			"./disable-selection",
+			"./focusable",
 			"./version"
 		], factory );
 	} else {
@@ -180,44 +181,11 @@ $.fn.extend( {
 	}
 } );
 
-// selectors
-function focusable( element, hasTabindex ) {
-	var map, mapName, img,
-		nodeName = element.nodeName.toLowerCase();
-	if ( "area" === nodeName ) {
-		map = element.parentNode;
-		mapName = map.name;
-		if ( !element.href || !mapName || map.nodeName.toLowerCase() !== "map" ) {
-			return false;
-		}
-		img = $( "img[usemap='#" + mapName + "']" )[ 0 ];
-		return !!img && visible( img );
-	}
-	return ( /^(input|select|textarea|button|object)$/.test( nodeName ) ?
-		!element.disabled :
-		"a" === nodeName ?
-			element.href || hasTabindex :
-			hasTabindex ) &&
-		// the element and all of its ancestors must be visible
-		visible( element );
-}
-
-function visible( element ) {
-	return $.expr.filters.visible( element ) &&
-		!$( element ).parents().addBack().filter( function() {
-			return $.css( this, "visibility" ) === "hidden";
-		} ).length;
-}
-
 $.extend( $.expr[ ":" ], {
-	focusable: function( element ) {
-		return focusable( element, $.attr( element, "tabindex" ) != null );
-	},
-
 	tabbable: function( element ) {
 		var tabIndex = $.attr( element, "tabindex" ),
 			hasTabindex = tabIndex != null;
-		return ( !hasTabindex || tabIndex >= 0 ) && focusable( element, hasTabindex );
+		return ( !hasTabindex || tabIndex >= 0 ) && $.ui.focusable( element, hasTabindex );
 	}
 } );