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/*!
* jQuery UI Focusable @VERSION
* http://jqueryui.com
*
* Copyright jQuery Foundation and other contributors
* Released under the MIT license.
* http://jquery.org/license
*/
//>>label: :focusable Selector
//>>group: Core
//>>description: Selects elements which can be focused.
//>>docs: http://api.jqueryui.com/focusable-selector/
( function( factory ) {
if ( typeof define === "function" && define.amd ) {
// AMD. Register as an anonymous module.
define( [ "jquery", "./version" ], factory );
} else {
// Browser globals
factory( jQuery );
}
} ( function( $ ) {
// Selectors
$.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 ) {
// Form controls within a disabled fieldset are disabled.
// However, controls within the fieldset's legend do not get disabled.
// Since controls generally aren't placed inside legends, we skip
// this portion of the check.
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 ) );
};
// Support: IE 8 only
// IE 8 doesn't resolve inherit to visible/hidden for computed values
function visible( element ) {
var visibility = element.css( "visibility" );
while ( visibility === "inherit" ) {
element = element.parent();
visibility = element.css( "visibility" );
}
return visibility !== "hidden";
}
$.extend( $.expr.pseudos, {
focusable: function( element ) {
return $.ui.focusable( element, $.attr( element, "tabindex" ) != null );
}
} );
return $.ui.focusable;
} ) );
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