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- ( function( factory ) {
- if ( typeof define === "function" && define.amd ) {
-
- define( [ "jquery", "./version" ], factory );
- } else {
-
- factory( jQuery );
- }
- } ( function( $ ) {
- $.ui.focusable = function( element, hasTabindex ) {
- var map, mapName, img, focusableIfVisible, fieldset,
- nodeName = element.nodeName.toLowerCase();
- if ( "area" === nodeName ) {
- map = element.parentNode;
- mapName = map.name;
- if ( !element.href || !mapName || map.nodeName.toLowerCase() !== "map" ) {
- return false;
- }
- img = $( "img[usemap='#" + mapName + "']" );
- return img.length > 0 && img.is( ":visible" );
- }
- if ( /^(input|select|textarea|button|object)$/.test( nodeName ) ) {
- focusableIfVisible = !element.disabled;
- if ( focusableIfVisible ) {
-
-
-
-
- fieldset = $( element ).closest( "fieldset" )[ 0 ];
- if ( fieldset ) {
- focusableIfVisible = !fieldset.disabled;
- }
- }
- } else if ( "a" === nodeName ) {
- focusableIfVisible = element.href || hasTabindex;
- } else {
- focusableIfVisible = hasTabindex;
- }
- return focusableIfVisible && $( element ).is( ":visible" ) && visible( $( element ) );
- };
- function visible( element ) {
- var visibility = element.css( "visibility" );
- while ( visibility === "inherit" ) {
- element = element.parent();
- visibility = element.css( "visibility" );
- }
- return visibility !== "hidden";
- }
- $.extend( $.expr[ ":" ], {
- focusable: function( element ) {
- return $.ui.focusable( element, $.attr( element, "tabindex" ) != null );
- }
- } );
- return $.ui.focusable;
- } ) );
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