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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 'left' is 'auto', 'width' and 'right' are 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-width" title="10.3.7 Absolutely positioned, non-replaced elements" />
  <link rel="match" href="s71-abs-pos-non-replaced-vrl-004-ref.xht" />

  <meta name="flags" content="ahem image" />
  <meta name="assert" content="When 'direction' is 'ltr' and 'left' is 'auto', 'width' and 'right' are not 'auto', then solve for 'left'." />

  <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-2row-320x320.png");
      color: transparent;
      direction: ltr;
      font: 80px/1 Ahem;
      height: 320px;
      position: relative;
      width: 320px;
    }

  div#containing-block > span
    {
      background-color: red;
      color: green;
      left: auto;
      position: absolute;
      right: 1em;
      width: 1em;
      -ah-writing-mode: vertical-rl;
      -webkit-writing-mode: vertical-rl;
      writing-mode: tb-rl; /* IE11 */
      writing-mode: vertical-rl;
    }

/*
"
4. 'left' is 'auto', 'width' and 'right' are not 'auto', then solve for 'left'
"

'left' + 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' + 'right' = width of containing block

So:

  (solve) : left: auto
  +
      0px : margin-left
  +
      0px : border-left-width
  +
      0px : padding-left
  +
     80px : width
  +
      0px : padding-right
  +
      0px : border-right-width
  +
      0px : margin-right
  +
     80px : right
    =====================
    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>