LayoutTests/css2.1/20110323/absolute-non-replaced-width-004.htm - WebKit - Git at Google

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
 <html>
     <head>
         <title>CSS Test: Absolutely positioned non-replaced elements when both 'margin-left' and 'margin-right' are set to 'auto' and direction is left-to-right</title>
         <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
         <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">
         <meta name="flags" content="ahem">
         <meta name="assert" content="When direction is 'ltr' and 'left', 'width' and 'right' are not 'auto', solve for 'margin-right' and 'margin-left' to equal values. If this would make 'margin-left' and 'margin-right' negative, then set 'margin-left' to zero and solve for 'margin-right'.">
         <style type="text/css">
             #div1
             {
                 border: solid black;
                 direction: ltr;
                 height: 2in;
                 position: relative;
                 width: 2in;
             }
             div div
             {
                 background: red;
                 color: blue;
                 font: 1in/1em Ahem;
                 left: 1in;
                 margin-left: auto;
                 margin-right: auto;
                 position: absolute;
                 right: 1in;
                 width: 1in;
             }
             /*
                 left                    :   1in
               + margin-left             :   solve (auto)
               + border-left-width       :   0
               + padding-left            :   0
               + width                   :   1in
               + padding-right           :   0
               + border-right-width      :   0
               + margin-right            :   solve (auto)
               + right                   :   1in
               ====================================
               width of containing block :   2in

             So, margin-left and margin-right would be each -0.5in at this point.

             "...unless this would make them (the two margins) negative in which case when direction of the containing block is 'ltr' ('rtl'), set 'margin-left' ('margin-right') to zero and solve for 'margin-right' ('margin-left')."

             So, under such extra constraint, 'margin-left' must become 0 and 'margin-right' must become -1in.
             */
         </style>
     </head>
     <body>
         <p>Test passes if the blue box fills the upper-right corner of the black box and there is no red visible on the page.</p>
         <div id="div1">
             <div>X</div>
         </div>
     </body>
 </html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
	<html>
	<head>
	<title>CSS Test: Absolutely positioned non-replaced elements when both 'margin-left' and 'margin-right' are set to 'auto' and direction is left-to-right</title>
	<link rel="author" title="Microsoft" href="http://www.microsoft.com/">
	<link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">
	<meta name="flags" content="ahem">
	<meta name="assert" content="When direction is 'ltr' and 'left', 'width' and 'right' are not 'auto', solve for 'margin-right' and 'margin-left' to equal values. If this would make 'margin-left' and 'margin-right' negative, then set 'margin-left' to zero and solve for 'margin-right'.">
	<style type="text/css">
	#div1
	{
	border: solid black;
	direction: ltr;
	height: 2in;
	position: relative;
	width: 2in;
	}
	div div
	{
	background: red;
	color: blue;
	font: 1in/1em Ahem;
	left: 1in;
	margin-left: auto;
	margin-right: auto;
	position: absolute;
	right: 1in;
	width: 1in;
	}
	/*
	left : 1in
	+ margin-left : solve (auto)
	+ border-left-width : 0
	+ padding-left : 0
	+ width : 1in
	+ padding-right : 0
	+ border-right-width : 0
	+ margin-right : solve (auto)
	+ right : 1in
	====================================
	width of containing block : 2in

	So, margin-left and margin-right would be each -0.5in at this point.

	"...unless this would make them (the two margins) negative in which case when direction of the containing block is 'ltr' ('rtl'), set 'margin-left' ('margin-right') to zero and solve for 'margin-right' ('margin-left')."

	So, under such extra constraint, 'margin-left' must become 0 and 'margin-right' must become -1in.
	*/
	</style>
	</head>
	<body>
	<p>Test passes if the blue box fills the upper-right corner of the black box and there is no red visible on the page.</p>
	<div id="div1">
	<div>X</div>
	</div>
	</body>
	</html>