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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+
+ <head>
+
+ <title>CSS Writing Modes Test: absolutely positioned non-replaced element - 'direction: ltr' and 'top', 'height' and 'bottom' are not 'auto' (overconstrained)</title>
+
+ <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
+ <link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#vertical-layout" title="7.1 Principles of Layout in Vertical Writing Modes" />
+ <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width" title="10.3.7 Absolutely positioned, non-replaced elements" />
+ <link rel="match" href="s71-abs-pos-non-replaced-vrl-002-ref.xht" />
+
+ <meta name="flags" content="ahem image" />
+ <meta name="assert" content="When 'direction' is 'ltr' and 'top', 'height' and 'bottom' are not 'auto' and if the values are overconstrained, then ignore 'bottom' and solve for 'bottom'." />
+
+ <link type="text/css" rel="stylesheet" href="support/ahem.css" />
+
+ <style type="text/css"><![CDATA[
+ div#containing-block
+ {
+ background: red url("support/bg-red-3col-3row-320x320.png");
+ color: transparent;
+ direction: ltr;
+ font: 80px/1 Ahem;
+ height: 320px;
+ position: relative;
+ width: 320px;
+ -ah-writing-mode: vertical-rl;
+ -webkit-writing-mode: vertical-rl;
+ writing-mode: tb-rl; /* IE11 */
+ writing-mode: vertical-rl;
+ }
+
+ div#containing-block > span
+ {
+ background-color: red;
+ bottom: 2em;
+ color: green;
+ height: 1em;
+ margin-bottom: 0em;
+ margin-top: 0em;
+ position: absolute;
+ top: 2em;
+ }
+
+/*
+"
+Layout calculation rules (such as those in CSS2.1, Section 10.3) that apply to the horizontal dimension in horizontal writing modes instead apply to the vertical dimension in vertical writing modes.
+"
+7.1 Principles of Layout in Vertical Writing Modes
+http://www.w3.org/TR/css-writing-modes-3/#vertical-layout
+
+So here, *-top and *-bottom properties are input into the §10.3.7 algorithms where *-top properties refer to *-left properties in the layout rules and where *-bottom properties refer to *-right properties in the layout rules.
+
+"
+If the values are over-constrained, ignore the value for 'left' (in case the 'direction' property of the containing block is 'rtl') or 'right' (in case 'direction' is 'ltr') and solve for that value.
+"
+
+'top' + 'margin-top' + 'border-top-width' + 'padding-top' + 'height' + 'padding-bottom' + 'border-bottom-width' + 'margin-bottom' + 'bottom' = height of containing block
+
+So:
+
+ 160px : top
+ +
+ 0px : margin-top
+ +
+ 0px : border-top-width
+ +
+ 0px : padding-top
+ +
+ 80px : height
+ +
+ 0px : padding-bottom
+ +
+ 0px : border-bottom-width
+ +
+ 0px : margin-bottom
+ +
+ 160px : bottom
+ =====================
+ 320px : height of containing block
+
+gives us:
+
+ 160px : top
+ +
+ 0px : margin-top
+ +
+ 0px : border-top-width
+ +
+ 0px : padding-top
+ +
+ 80px : height
+ +
+ 0px : padding-bottom
+ +
+ 0px : border-bottom-width
+ +
+ 0px : margin-bottom
+ +
+ (solve) : bottom
+ =====================
+ 320px : height of containing block
+
+And so computed bottom value must be 80px .
+*/
+
+ ]]></style>
+
+ </head>
+
+ <body>
+
+ <p><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /></p>
+
+ <div id="containing-block">1 2 34<span>X</span></div>
+
+ </body>
+</html> \ No newline at end of file