2009-08-01 08:53:40 -07:00
|
|
|
<!DOCTYPE HTML>
|
|
|
|
|
<html>
|
|
|
|
|
<!--
|
|
|
|
|
https://bugzilla.mozilla.org/show_bug.cgi?id=478321
|
|
|
|
|
-->
|
|
|
|
|
<head>
|
|
|
|
|
<title>Test for CSS 'rem' unit</title>
|
|
|
|
|
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
|
|
|
|
|
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
|
|
|
|
|
</head>
|
|
|
|
|
<body>
|
|
|
|
|
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=478321">Mozilla Bug 478321</a>
|
|
|
|
|
<p id="display"></p>
|
|
|
|
|
<p id="display2"></p>
|
|
|
|
|
<div id="content" style="display: none">
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
<pre id="test">
|
|
|
|
|
<script type="application/javascript">
|
|
|
|
|
|
|
|
|
|
/** Test for CSS 'rem' unit **/
|
|
|
|
|
|
|
|
|
|
function px_to_num(str)
|
|
|
|
|
{
|
|
|
|
|
return Number(String(str).match(/^([\d.]+)px$/)[1]);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
function fs(elt)
|
|
|
|
|
{
|
|
|
|
|
return px_to_num(getComputedStyle(elt, "").fontSize);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
var html = document.documentElement;
|
|
|
|
|
var body = document.body;
|
|
|
|
|
var p = document.getElementById("display");
|
|
|
|
|
var p2 = document.getElementById("display2");
|
|
|
|
|
|
2012-10-30 08:57:36 -07:00
|
|
|
html.style.font = "initial";
|
2009-08-01 08:53:40 -07:00
|
|
|
|
|
|
|
|
var defaultFontSize = fs(html);
|
|
|
|
|
|
|
|
|
|
// NOTE: This test assumes that the default font size is an
|
|
|
|
|
// integral number of pixels (which is always the case at present).
|
|
|
|
|
// If that ever becomes false, the calls to "is" may need to be replaced by
|
|
|
|
|
// calls to "isapprox" that allows errors of up to some small fraction
|
|
|
|
|
// of a pixel.
|
|
|
|
|
|
|
|
|
|
html.style.fontSize = "3rem";
|
|
|
|
|
is(fs(html), 3 * defaultFontSize,
|
|
|
|
|
"3rem on root should triple root's font size");
|
2012-10-30 08:57:36 -07:00
|
|
|
body.style.font = "initial";
|
2009-08-01 08:53:40 -07:00
|
|
|
is(fs(body), defaultFontSize,
|
2012-10-30 08:57:36 -07:00
|
|
|
"initial should produce initial font size");
|
2009-08-01 08:53:40 -07:00
|
|
|
body.style.fontSize = "1em";
|
|
|
|
|
is(fs(body), 3 * defaultFontSize, "1em should inherit from parent");
|
|
|
|
|
body.style.fontSize = "200%";
|
|
|
|
|
is(fs(body), 6 * defaultFontSize, "200% should double parent");
|
|
|
|
|
body.style.fontSize = "2rem";
|
|
|
|
|
is(fs(body), 6 * defaultFontSize, "2rem should double root");
|
|
|
|
|
p.style.font = "inherit";
|
|
|
|
|
is(fs(p), 6 * defaultFontSize, "inherit should inherit from parent");
|
|
|
|
|
p2.style.fontSize = "2rem";
|
|
|
|
|
is(fs(p2), 6 * defaultFontSize, "2rem should double root");
|
2012-10-30 08:57:36 -07:00
|
|
|
body.style.font = "initial";
|
2009-08-01 08:53:40 -07:00
|
|
|
is(fs(p), defaultFontSize, "inherit should inherit from parent");
|
|
|
|
|
is(fs(p2), 6 * defaultFontSize, "2rem should double root");
|
|
|
|
|
body.style.fontSize = "5em";
|
|
|
|
|
html.style.fontSize = "200%";
|
|
|
|
|
is(fs(p), 10 * defaultFontSize, "inherit should inherit from parent");
|
|
|
|
|
is(fs(p2), 4 * defaultFontSize, "2rem should double root");
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Make things readable again.
|
|
|
|
|
html.style.fontSize = "1em";
|
|
|
|
|
body.style.fontSize = "1em";
|
|
|
|
|
|
|
|
|
|
</script>
|
|
|
|
|
</pre>
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
