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71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
define([
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"../core",
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"../manipulation" // appendTo
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], function( jQuery ) {
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var iframe,
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elemdisplay = {};
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/**
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* Retrieve the actual display of a element
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* @param {String} name nodeName of the element
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* @param {Object} doc Document object
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*/
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// Called only from within defaultDisplay
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function actualDisplay( name, doc ) {
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var style,
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elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),
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// getDefaultComputedStyle might be reliably used only on attached element
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display = window.getDefaultComputedStyle && ( style = window.getDefaultComputedStyle( elem[ 0 ] ) ) ?
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// Use of this method is a temporary fix (more like optmization) until something better comes along,
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// since it was removed from specification and supported only in FF
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style.display : jQuery.css( elem[ 0 ], "display" );
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// We don't have any data stored on the element,
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// so use "detach" method as fast way to get rid of the element
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elem.detach();
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return display;
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}
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/**
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* Try to determine the default display value of an element
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* @param {String} nodeName
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*/
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function defaultDisplay( nodeName ) {
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var doc = document,
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display = elemdisplay[ nodeName ];
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if ( !display ) {
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display = actualDisplay( nodeName, doc );
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// If the simple way fails, read from inside an iframe
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if ( display === "none" || !display ) {
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// Use the already-created iframe if possible
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iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );
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// Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
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doc = iframe[ 0 ].contentDocument;
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// Support: IE
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doc.write();
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doc.close();
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display = actualDisplay( nodeName, doc );
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iframe.detach();
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}
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// Store the correct default display
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elemdisplay[ nodeName ] = display;
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}
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return display;
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}
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return defaultDisplay;
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});
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