Club Drupal

define([

        "../core",

        "../manipulation" // appendTo

], function( jQuery ) {

var iframe,

        elemdisplay = {};

/**

 * Retrieve the actual display of a element

 * @param {String} name nodeName of the element

 * @param {Object} doc Document object

 */

// Called only from within defaultDisplay

function actualDisplay( name, doc ) {

        var style,

                elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),

                // getDefaultComputedStyle might be reliably used only on attached element

                display = window.getDefaultComputedStyle && ( style = window.getDefaultComputedStyle( elem[ 0 ] ) ) ?

                        // Use of this method is a temporary fix (more like optmization) until something better comes along,

                        // since it was removed from specification and supported only in FF

                        style.display : jQuery.css( elem[ 0 ], "display" );

        // We don't have any data stored on the element,

        // so use "detach" method as fast way to get rid of the element

        elem.detach();

        return display;

}

/**

 * Try to determine the default display value of an element

 * @param {String} nodeName

 */

function defaultDisplay( nodeName ) {

        var doc = document,

                display = elemdisplay[ nodeName ];

        if ( !display ) {

                display = actualDisplay( nodeName, doc );

                // If the simple way fails, read from inside an iframe

                if ( display === "none" || !display ) {

                        // Use the already-created iframe if possible

                        iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );

                        // Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse

                        doc = ( iframe[ 0 ].contentWindow || iframe[ 0 ].contentDocument ).document;

                        // Support: IE

                        doc.write();

                        doc.close();

                        display = actualDisplay( nodeName, doc );

                        iframe.detach();

                }

                // Store the correct default display

                elemdisplay[ nodeName ] = display;

        }

        return display;

}

return defaultDisplay;

});