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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 Test: line-height - line box height calculations</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#line-height" title="10.8 Line height calculations: the 'line-height' and 'vertical-align' properties" />
<link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#inline-formatting" title="9.4.2 Inline formatting contexts" />
<meta content="text/javascript" http-equiv="Content-Script-Type" />
<meta content="ahem dom image interact" name="flags" />
<meta content="A line box is always tall enough for all of the boxes it contains. A line box can be as tall as the tallest inline non-replaced box it contains." name="assert" />
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style type="text/css"><![CDATA[
body
{
background: white url("support/ruler-v-100px-200px.png") no-repeat;
margin: 8px 8px 8px 55px;
/*
16px : margin collapsing between body's margin-top and p's margin-top == max(8px, 16px)
+
20px : first line of p
+
20px : second line box of p
+
20px : third line box of p
+
24px : margin-bottom of p
=======
100px
*/
}
p
{
font: 1em/1.25 serif;
margin: 1em 0.5em 1.5em;
}
div
{
background-color: orange; /* The line box will be painted orange */
font-family: Ahem;
line-height: 0;
}
span
{
color: black;
line-height: 1;
vertical-align: baseline;
}
span#twenty {font-size: 20px; display: none;}
span#thirty {font-size: 30px; display: none;}
span#forty {font-size: 40px; display: none;}
span#fifty {font-size: 50px; display: none;}
span#sixty {font-size: 60px; display: none;}
span#eighty {font-size: 80px; display: none;}
span#one-hundred {font-size: 100px; display: none;}
]]></style>
<script type="text/javascript"><![CDATA[
function resetChkboxes()
{
var collectionOfCheckboxes = document.getElementsByTagName("input");
for (var iterator = 0; iterator < collectionOfCheckboxes.length; iterator++)
{
collectionOfCheckboxes.item(iterator).checked = false;
};
}
function updateLinebox(chkbox)
{
if(chkbox.checked)
{
document.getElementById(chkbox.id.slice(3)).style.display = "inline";
}
else
{
document.getElementById(chkbox.id.slice(3)).style.display = "none";
};
}
]]></script>
</head>
<body onload="resetChkboxes();">
<p>Check or uncheck as many checkboxes as you want.<br />
Test passes if the orange rectangle is always just<br />
tall enough to contain the tallest black square in it.</p>
<div><span id="twenty">2</span> <span id="thirty">3</span> <span id="forty">4</span> <span id="fifty">5</span> <span id="sixty">6</span> <span id="eighty">8</span> <span id="one-hundred">1</span></div>
<p><input type="checkbox" id="chktwenty" value="20" onclick="updateLinebox(this);" /><input type="checkbox" id="chkthirty" value="30" onclick="updateLinebox(this);" /><input type="checkbox" id="chkforty" value="40" onclick="updateLinebox(this);" /><input type="checkbox" id="chkfifty" value="50" onclick="updateLinebox(this);" /><input type="checkbox" id="chksixty" value="60" onclick="updateLinebox(this);" /><input type="checkbox" id="chkeighty" value="80" onclick="updateLinebox(this);" /><input type="checkbox" id="chkone-hundred" value="100" onclick="updateLinebox(this);" /></p>
</body>
</html>
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