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Core: reuse tabindex value. Fixed #7257 - optimize :tabbable.

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adambaratz 2011-04-15 07:51:56 -07:00 committed by Scott González
parent 5058ac3ce7
commit fe3b36b8ef
1 changed files with 25 additions and 21 deletions
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46
ui/jquery.ui.core.js vendored
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@ -174,6 +174,27 @@ $.each( [ "Width", "Height" ], function( i, name ) {
}); });
// selectors // selectors
function focusable( element, isTabIndexNotNaN ) {
var nodeName = element.nodeName.toLowerCase();
if ( "area" === nodeName ) {
var map = element.parentNode,
mapName = map.name,
img;
if ( !element.href || !mapName || map.nodeName.toLowerCase() !== "map" ) {
return false;
}
img = $( "img[usemap=#" + mapName + "]" )[0];
return !!img && visible( img );
}
return ( /input|select|textarea|button|object/.test( nodeName )
? !element.disabled
: "a" == nodeName
? element.href || isTabIndexNotNaN
: isTabIndexNotNaN)
// the element and all of its ancestors must be visible
&& visible( element );
}
function visible( element ) { function visible( element ) {
return !$( element ).parents().andSelf().filter(function() { return !$( element ).parents().andSelf().filter(function() {
return $.curCSS( this, "visibility" ) === "hidden" || return $.curCSS( this, "visibility" ) === "hidden" ||
@ -187,30 +208,13 @@ $.extend( $.expr[ ":" ], {
}, },
focusable: function( element ) { focusable: function( element ) {
var nodeName = element.nodeName.toLowerCase(), return focusable( element, !isNaN( $.attr( element, "tabindex" ) ) );
tabIndex = $.attr( element, "tabindex" );
if ( "area" === nodeName ) {
var map = element.parentNode,
mapName = map.name,
img;
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 || !isNaN( tabIndex )
: !isNaN( tabIndex ))
// the element and all of its ancestors must be visible
&& visible( element );
}, },
tabbable: function( element ) { tabbable: function( element ) {
var tabIndex = $.attr( element, "tabindex" ); var tabIndex = $.attr( element, "tabindex" ),
return ( isNaN( tabIndex ) || tabIndex >= 0 ) && $( element ).is( ":focusable" ); isTabIndexNaN = isNaN( tabIndex );
return ( isTabIndexNaN || tabIndex >= 0 ) && focusable( element, !isTabIndexNaN );
} }
}); });