id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12458	CSS style attribute values with semicolons converted to lowercase in IE	Jeroen		"When pasting this source code into CKEditor (tested with 4.4.4) in Internet Explorer (tested with IE11):

{{{
<div style=""background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==')"">Foo</div>
}}}

It is changed into the following code when switching back to the WYSIWYG view:

{{{
<div style=""background-image: url(&quot;data:image/png;base64,ivborw0kggoaaaansuheugaaaauaaaafcayaaacnbyblaaaaheleqvqi12p4//8/w38giaxdibke0dhxgljnbaao9txl0y4ohwaaaabjru5erkjggg==&quot;);"">Foo</div>
}}}

Because data URIs are case-sensitive, the image becomes invalid.

The cause is the semicolon before `base64`. This part of htmldataprocessor.js contains the bug:

{{{
if ( CKEDITOR.env.ie ) {
	// IE outputs style attribute in capital letters. We should convert
	// them back to lower case, while not hurting the values (#5930)
	defaultHtmlFilterRulesForAll.attributes.style = function( value, element ) {
		return value.replace( /(^|;)([^\:]+)/g, function( match ) {
			alert(match);
			return match.toLowerCase();
		} );
	};
}
}}}"	Bug	confirmed	Normal		Core : Output Data	4.3		IE