Blitz - WPT: abs-pos-non-replaced-vlr-123.xht

wpt / css / css-writing-modes / abs-pos-non-replaced-vlr-123.xht

/css/css-writing-modes/abs-pos-non-replaced-vlr-123.xht

<!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 'width' and 'right' are 'auto' and 'left' 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-vlr-007-ref.xht" />

  <meta name="flags" content="ahem image" />
  <meta name="assert" content="When 'direction' is 'ltr' and 'width' and 'right' are 'auto' and 'left' is not 'auto' and 'writing-mode' is 'vertical-rl', then the width is based on the content and then solve for 'right'." />

  <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
  <style type="text/css"><![CDATA[
  html
    {
      writing-mode: vertical-lr;
    }

  div#containing-block
    {
      background: red url("support/bg-red-2col-3row-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: 1em;
      position: absolute;
      right: auto;
      width: auto;
    }

/*
"
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 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.

"
1. 'top' and 'height' are 'auto' and 'bottom' 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 'top'
"

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

So:

  (solve) : right: auto
  +
      0px : margin-right
  +
      0px : border-right-width
  +
      0px : padding-right
  +
  (based on the content) : width: auto
  +
      0px : padding-left
  +
      0px : border-left-width
  +
      0px : margin-left
  +
     80px : left: auto
    =====================
    320px : width of containing block

gives us:

  (solve) : right: auto
  +
      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
  +
     80px : left: auto
    =====================
    320px : width of containing block

And so computed right 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>

/css/css-writing-modes/abs-pos-non-replaced-vlr-007-ref.xht

<!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 Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <meta content="image" name="flags" />

  <style type="text/css"><![CDATA[
  div
    {
      margin-left: 0.5em;
    }

  img
    {
      vertical-align: top;
    }

  img#green-square
    {
      position: relative;
      left: 96px; /* 80px + p's margin-left (1em) */
      top: 160px;
    }
  ]]></style>
 </head>

 <body>

  <div><img src="support/pass-cdts-abs-pos-non-replaced.png" width="246" height="36" alt="Image download support must be enabled" /><img id="green-square" src="support/swatch-green.png" width="80" height="80" alt="Image download support must be enabled" /></div>

 </body>
</html>