Ticket #6609: 6609.patch

_source/core/_bootstrap.js

@@ -16 +16 @@
                 return;
         }
 
-        // Check is High Contrast is active by creating a temporary element with a
-        // background image.
-
-        var useSpacer = CKEDITOR.env.ie && CKEDITOR.env.version < 7,
-                useBlank = CKEDITOR.env.ie && CKEDITOR.env.version == 7;
-
-        var backgroundImageUrl = useSpacer ? ( CKEDITOR.basePath + 'images/spacer.gif' ) :
-                                                         useBlank ? 'about:blank' : 'data:image/png;base64,';
-
+        // Check whether high contrast is active by creating a colored border.
         var hcDetect = CKEDITOR.dom.element.createFromHtml(
-                '<div style="width:0px;height:0px;' +
-                        'position:absolute;left:-10000px;' +
-                        'background-image:url(' + backgroundImageUrl + ')"></div>', CKEDITOR.document );
+                '<div style="width:0px;height:0px;position:absolute;left:-10000px;' +
+                        'border: 1px solid;border-color: red blue;"></div>', CKEDITOR.document );
 
         hcDetect.appendTo( CKEDITOR.document.getHead() );
 
@@ -36 +27 @@
         // Catch exception needed sometimes for FF. (#4230)
         try
         {
-                CKEDITOR.env.hc = ( hcDetect.getComputedStyle( 'background-image' ) == 'none' );
+                CKEDITOR.env.hc = hcDetect.getComputedStyle( 'border-top-color' ) == hcDetect.getComputedStyle( 'border-right-color' );
         }
         catch (e)
         {