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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=975681
-->
<head>
<meta charset="utf-8">
<title> Test for Bug 975681 </title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"> </script>
<script type="application/javascript" src="/tests/SimpleTest/EventUtils.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=975681"> Mozilla Bug 975681 </a>
<p id="display"></p>
<p>
<math>
<mfrac id="test_mfrac">
<mspace width="100px" height="20px" mathbackground="red"></mspace>
<mspace width="100px" height="20px" mathbackground="red"></mspace>
</mfrac>
</math>
</p>
<p>
<math>
<mfrac linethickness="30px" id="mfrac_linethickness">
<mspace width="100px" height="20px" mathbackground="red"></mspace>
<mspace width="100px" height="20px" mathbackground="red"></mspace>
</mfrac>
</math>
</p>
<p>
<math>
<mfrac numalign="left" id="mfrac_numalign">
<mspace width="50px" height="20px" mathbackground="red"></mspace>
<mspace width="100px" height="20px" mathbackground="red"></mspace>
</mfrac>
</math>
</p>
<p>
<math>
<mfrac denomalign="right" id="mfrac_denomalign">
<mspace width="100px" height="20px" mathbackground="red"></mspace>
<mspace width="50px" height="20px" mathbackground="red"></mspace>
</mfrac>
</math>
</p>
<p>
<math>
<mfrac bevelled="true" id="mfrac_bevelled">
<mspace width="100px" height="20px" mathbackground="red"></mspace>
<mspace width="100px" height="20px" mathbackground="red"></mspace>
</mfrac>
</math>
</p>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 975681 **/
SimpleTest.waitForExplicitFinish();
var epsilon = 1; // allow a small relative error
var delta = .25; // used to indicate a small shift
function almostEqualAbs(x, y) {
var e = Math.abs(x - y);
return (e <= epsilon);
}
function almostLessThanAbs(x, y) {
var e = x - y;
return (e <= epsilon);
}
// test: mfrac
var mfracNum = document.getElementById("test_mfrac").firstElementChild.getBoundingClientRect();
var mfracDenom = document.getElementById("test_mfrac").lastElementChild.getBoundingClientRect();
ok(almostEqualAbs(mfracNum.left, mfracDenom.left) &&
almostEqualAbs(mfracNum.right, mfracDenom.right), "Numerator and denominator should be vertical aligned");
ok(almostLessThanAbs(mfracNum.bottom, mfracDenom.top), "Numerator should be above denominator");
// test: mfrac attributes
var mfrac = document.getElementById("mfrac_linethickness").getBoundingClientRect();
var num = document.getElementById("mfrac_linethickness").firstElementChild.getBoundingClientRect();
var denom = document.getElementById("mfrac_linethickness").lastElementChild.getBoundingClientRect();
ok(almostLessThanAbs(num.height + 30 + denom.height, mfrac.height) &&
almostLessThanAbs(num.bottom + 30, denom.top), "numerator and denominator should be separated by linethickness");
num = document.getElementById("mfrac_numalign").firstElementChild.getBoundingClientRect();
mfrac = document.getElementById("mfrac_numalign").getBoundingClientRect();
ok(almostEqualAbs(num.left, mfrac.left), "numerator should be aligned left");
mfrac = document.getElementById("mfrac_denomalign").getBoundingClientRect();
denom = document.getElementById("mfrac_denomalign").lastElementChild.getBoundingClientRect();
ok(almostEqualAbs(mfrac.right, denom.right), "denominator should be aligned right");
num = document.getElementById("mfrac_bevelled").firstElementChild.getBoundingClientRect();
denom = document.getElementById("mfrac_bevelled").lastElementChild.getBoundingClientRect();
ok(almostLessThanAbs(num.right, denom.left) &&
almostLessThanAbs(num.top*(1-delta)+num.bottom*delta, denom.top), "incorrect position of mfrac children");
SimpleTest.finish();
</script>
</body>
</html>
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