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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Underscripts and Overscripts parameters</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#underscripts-and-overscripts-munder-mover-munderover">
<meta name="assert" content="Elements munder, mover, munderover correctly .">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/fonts.js"></script>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
math, mspace, mo {
font-family: Ahem;
font-size: 10px;
}
</style>
<script>
/* This test does not use any specific fonts and so the exact rules are not
specified precisely. We assume reasonable values for script shifts and
spacing. */
function getBox(aId) {
var box = document.getElementById(aId).getBoundingClientRect();
box.middle = (box.bottom + box.top) / 2;
box.center = (box.left + box.right) / 2;
return box;
}
setup({ explicit_done: true });
window.addEventListener("load", () => { loadAllFonts().then(runTests); });
function runTests() {
test(function() {
assert_true(MathMLFeatureDetection.has_mspace());
var e = 1;
for (var i = 0; i <= 3; i++) {
assert_approx_equals(getBox("under" + i + "base").middle, getBox("baseline").bottom, e, "munder " + i + ": base is placed on the baseline");
assert_approx_equals(getBox("over" + i + "base").middle, getBox("baseline").bottom, e, "mover " + i + ": base is placed on the baseline");
}
for (var i = 0; i <= 5; i++) {
assert_approx_equals(getBox("underover" + i + "base").middle, getBox("baseline").bottom, e, "munderover " + i + ": base is placed on the baseline");
}
}, "Alignment of the base on the baseline");
test(function() {
assert_true(MathMLFeatureDetection.has_mspace());
var e = 1;
for (var i = 0; i <= 3; i++) {
assert_approx_equals(getBox("under" + i + "under").center, getBox("under" + i + "base").center, e, "munder " + i + ": base and script are horizontally centered");
assert_approx_equals(getBox("over" + i + "over").center, getBox("over" + i + "base").center, e, "mover " + i + ": base and script are horizontally centered");
}
for (var i = 0; i <= 5; i++) {
assert_approx_equals(getBox("underover" + i + "under").center, getBox("underover" + i + "base").center, e, "munderover " + i + ": base and underscript are horizontally centered");
assert_approx_equals(getBox("underover" + i + "over").center, getBox("underover" + i + "base").center, e, "munderover " + i + ": base and overscript are horizontally centered");
}
}, "Horizontal alignments of base and scripts");
test(function() {
assert_true(MathMLFeatureDetection.has_mspace());
for (var i = 0; i <= 3; i++) {
assert_greater_than_equal(getBox("under" + i + "under").top, getBox("under" + i + "base").bottom, "munder " + i + ": script is under base");
assert_less_than_equal(getBox("over" + i + "over").bottom, getBox("over" + i + "base").top, "mover " + i + ": script is over base");
}
for (var i = 0; i <= 5; i++) {
assert_greater_than_equal(getBox("underover" + i + "under").top, getBox("underover" + i + "base").bottom, "munderover " + i + ": underscript is under base");
assert_less_than_equal(getBox("underover" + i + "over").bottom, getBox("underover" + i + "base").top, "munderover " + i + ": overscript is over base");
}
}, "Relative vertical positions of base and scripts");
test(function() {
assert_true(MathMLFeatureDetection.has_mspace());
var e = 1;
for (var i = 0; i <= 3; i++) {
assert_approx_equals(getBox("under" + i).width, Math.max(getBox("under" + i + "base").width, getBox("under" + i + "under").width), e, "munder " + i + ": width is determined by the maximum of width of base and script");
assert_approx_equals(getBox("over" + i).width, Math.max(getBox("over" + i + "base").width, getBox("over" + i + "over").width), e, "mover " + i + ": width is determined by the maximum of width of base and script");
}
for (var i = 0; i <= 5; i++) {
assert_approx_equals(getBox("underover" + i).width, Math.max(getBox("underover" + i + "base").width, getBox("underover" + i + "under").width, getBox("underover" + i + "over").width), e, "munderover " + i + ": width is determined by the maximum of width of base and scripts");
}
}, "Width of scripted elements");
test(function() {
assert_true(MathMLFeatureDetection.has_mspace());
var e = 4;
for (var i = 0; i <= 3; i++) {
assert_approx_equals(getBox("under" + i).height, getBox("under" + i + "base").height + getBox("under" + i + "under").height, e, "munder " + i + ": height is determined by the sum of heights of base and script plus some spacing.");
assert_approx_equals(getBox("over" + i).height, getBox("over" + i + "base").height + getBox("over" + i + "over").height, e, "mover " + i + ": height is determined by the sum of heights of base and script plus some spacing.");
}
for (var i = 0; i <= 5; i++) {
assert_approx_equals(getBox("underover" + i).height, getBox("underover" + i + "base").height + getBox("underover" + i + "under").height + getBox("underover" + i + "over").height, e, "munderover " + i + ": height is determined by the sum heights of base and scripts");
}
}, "Height of scripted elements");
done();
}
</script>
</head>
<body>
<div id="log"></div>
<p>
<math>
<mspace id="baseline" width="30px" height="2px" depth="0px" style="background: blue"/>
<munder id="under0">
<mspace id="under0base" width="30px" height="5px" depth="5px" style="background: black"/>
<mspace id="under0under" width="10px" height="5px" depth="5px" style="background: black"/>
</munder>
<munder id="under1">
<mspace id="under1base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="under1under" width="30px" height="5px" depth="5px" style="background: black"/>
</munder>
<munder id="under2">
<mspace id="under2base" width="10px" height="15px" depth="15px" style="background: black"/>
<mspace id="under2under" width="10px" height="5px" depth="5px" style="background: black"/>
</munder>
<munder id="under3">
<mspace id="under3base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="under3under" width="10px" height="15px" depth="15px" style="background: black"/>
</munder>
<mover id="over0">
<mspace id="over0base" width="30px" height="5px" depth="5px" style="background: black"/>
<mspace id="over0over" width="10px" height="5px" depth="5px" style="background: black"/>
</mover>
<mover id="over1">
<mspace id="over1base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="over1over" width="30px" height="5px" depth="5px" style="background: black"/>
</mover>
<mover id="over2">
<mspace id="over2base" width="10px" height="15px" depth="15px" style="background: black"/>
<mspace id="over2over" width="10px" height="5px" depth="5px" style="background: black"/>
</mover>
<mover id="over3">
<mspace id="over3base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="over3over" width="10px" height="15px" depth="15px" style="background: black"/>
</mover>
<munderover id="underover0">
<mspace id="underover0base" width="30px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover0under" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover0over" width="10px" height="5px" depth="5px" style="background: black"/>
</munderover>
<munderover id="underover1">
<mspace id="underover1base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover1under" width="30px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover1over" width="10px" height="5px" depth="5px" style="background: black"/>
</munderover>
<munderover id="underover2">
<mspace id="underover2base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover2under" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover2over" width="30px" height="5px" depth="5px" style="background: black"/>
</munderover>
<munderover id="underover3">
<mspace id="underover3base" width="10px" height="15px" depth="15px" style="background: black"/>
<mspace id="underover3under" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover3over" width="10px" height="5px" depth="5px" style="background: black"/>
</munderover>
<munderover id="underover4">
<mspace id="underover4base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover4under" width="10px" height="15px" depth="15px" style="background: black"/>
<mspace id="underover4over" width="10px" height="5px" depth="5px" style="background: black"/>
</munderover>
<munderover id="underover5">
<mspace id="underover5base" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover5under" width="10px" height="5px" depth="5px" style="background: black"/>
<mspace id="underover5over" width="10px" height="15px" depth="15px" style="background: black"/>
</munderover>
</math>
</p>
</body>
</html>
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