<!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: rtl' and 'left' and 'width' are 'auto' and 'right' is not 'auto'</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-height" title="10.6.4 Absolutely positioned, non-replaced elements" /> <link rel="match" href="abs-pos-non-replaced-vrl-004-ref.xht" /> <meta name="flags" content="ahem image" /> <meta name="assert" content="When 'direction' is 'rtl' and 'left' and 'width' are 'auto' and 'right' is not 'auto' and 'writing-mode' is 'vertical-lr', then the width is based on the content and then solve for 'left'." /> <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-2row-320x320.png"); color: transparent; direction: rtl; font: 80px/1 Ahem; height: 320px; position: relative; width: 320px; writing-mode: vertical-lr; } div#containing-block > span { background-color: red; color: green; left: auto; position: absolute; right: 1em; width: auto; writing-mode: horizontal-tb; } /* " 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, *left properties and *right properties are input into the §10.6.4 algorithms where *left properties refer to *top properties in the layout rules and where *right properties refer to *bottom properties in the layout rules. " 3. 'height' and 'bottom' are 'auto' and 'top' is not 'auto', then the height is based on the content per 10.6.7, set 'auto' values for 'margin-top' and 'margin-bottom' to 0, and solve for 'bottom' " 'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block So: 80px : right + 0px : margin-right + 0px : border-right-width + 0px : padding-right + 80px : (based on the content) : width: auto + 0px : padding-left + 0px : border-left-width + 0px : margin-left + (solve) : left: auto ===================== 320px : width of containing block And so computed left value must be 160px . */ ]]></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>