<!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', 'bottom' and 'height' are not 'auto' (overconstrained)</title> <link rel="author" title="GĂ©rard 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-height" title="10.6.4 Absolutely positioned, non-replaced elements" /> <link rel="match" href="abs-pos-non-replaced-vrl-002-ref.xht" /> <meta name="flags" content="ahem image" /> <meta name="assert" content="When 'direction' is 'ltr' and 'top', 'bottom' and 'height' are not 'auto' and if the values are over-constrained, then ignore the value for 'bottom' and solve for that value." /> <link rel="stylesheet" type="text/css" href="/fonts/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; } div#containing-block > span { background-color: red; bottom: 2em; color: green; height: 1em; position: absolute; top: 2em; writing-mode: vertical-lr; } /* " If none of the three are 'auto': If both 'margin-top' and 'margin-bottom' are 'auto', solve the equation under the extra constraint that the two margins get equal values. If one of 'margin-top' or 'margin-bottom' is 'auto', solve the equation for that value. If the values are over-constrained, ignore the value for 'bottom' 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>