git.r.bdr.sh - rbdr/dotfiles/blob - atom/packages/ex-mode/node_modules/space-pen/node_modules/jquery/src/css/defaultDisplay.js

   1 define([
   2         "../core",
   3         "../manipulation" // appendTo
   4 ], function( jQuery ) {
   5
   6 var iframe,
   7         elemdisplay = {};
   8
   9 /**
  10  * Retrieve the actual display of a element
  11  * @param {String} name nodeName of the element
  12  * @param {Object} doc Document object
  13  */
  14 // Called only from within defaultDisplay
  15 function actualDisplay( name, doc ) {
  16         var style,
  17                 elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),
  18
  19                 // getDefaultComputedStyle might be reliably used only on attached element
  20                 display = window.getDefaultComputedStyle && ( style = window.getDefaultComputedStyle( elem[ 0 ] ) ) ?
  21
  22                         // Use of this method is a temporary fix (more like optimization) until something better comes along,
  23                         // since it was removed from specification and supported only in FF
  24                         style.display : jQuery.css( elem[ 0 ], "display" );
  25
  26         // We don't have any data stored on the element,
  27         // so use "detach" method as fast way to get rid of the element
  28         elem.detach();
  29
  30         return display;
  31 }
  32
  33 /**
  34  * Try to determine the default display value of an element
  35  * @param {String} nodeName
  36  */
  37 function defaultDisplay( nodeName ) {
  38         var doc = document,
  39                 display = elemdisplay[ nodeName ];
  40
  41         if ( !display ) {
  42                 display = actualDisplay( nodeName, doc );
  43
  44                 // If the simple way fails, read from inside an iframe
  45                 if ( display === "none" || !display ) {
  46
  47                         // Use the already-created iframe if possible
  48                         iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );
  49
  50                         // Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
  51                         doc = iframe[ 0 ].contentDocument;
  52
  53                         // Support: IE
  54                         doc.write();
  55                         doc.close();
  56
  57                         display = actualDisplay( nodeName, doc );
  58                         iframe.detach();
  59                 }
  60
  61                 // Store the correct default display
  62                 elemdisplay[ nodeName ] = display;
  63         }
  64
  65         return display;
  66 }
  67
  68 return defaultDisplay;
  69
  70 });