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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: position absolute and 'vertical-rl' - 'left: auto', 'width: auto' and 'right: auto' with 'direction: ltr' in initial containing block</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="match" href="../reference/ref-filled-green-100px-square.xht" />
<meta content="This test checks that when the initial containing block's writing-mode is 'horizontal-tb' and its 'direction' is 'ltr', then an absolutely positioned box (with 'left: auto', 'width: auto' and 'right: auto') whose containing block is the initial containing block must set 'left' to the static position. Whether such absolutely positioned box's 'writing-mode' is vertical or not is irrelevant." name="assert" />
<style type="text/css"><![CDATA[
html
{
direction: ltr;
}
div#green-overlapping-test
{
border-left: green solid 25px;
border-right: green solid 75px;
height: 100px;
left: auto;
position: absolute;
right: auto;
width: auto;
writing-mode: vertical-rl;
}
/*
"
If all three of 'left', 'width', and 'right' are 'auto': First set any 'auto' values for 'margin-left' and 'margin-right' to 0. Then, if the 'direction' property of the element establishing the static-position containing block is 'ltr' set 'left' to the static position and apply rule number three below; otherwise, set 'right' to the static position and apply rule number one below.
(...)
3. 'width' and 'right' are 'auto' and 'left' is not 'auto', then the width is shrink-to-fit . Then solve for 'right'
"
10.3.7 Absolutely positioned, non-replaced elements
http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width
So:
auto : left
+
0px : margin-left
+
25px : border-left-width
+
0px : padding-left
+
auto : width
+
0px : padding-right
+
75px : border-right-width
+
0px : margin-right
+
auto : right
====================
: width of containing block (width of Initial Containing Block)
becomes
8px : left
+
0px : margin-left
+
25px : border-left-width
+
0px : padding-left
+
0px : width (shrink-to-fit)
+
0px : padding-right
+
75px : border-right-width
+
0px : margin-right
+
solve : right
====================
: width of containing block (width of Initial Containing Block)
*/
div#red-overlapped-reference
{
background-color: red;
height: 100px;
width: 100px;
}
]]></style>
</head>
<body>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="green-overlapping-test"></div>
<div id="red-overlapped-reference"></div>
</body>
</html>
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