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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test placement of non-stretchy symmetric/non-symmetric largeops with a block-direction intrinsic stretch axis</title>
<link rel="help" href="https://issues.chromium.org/issues/40889877">
<link rel="help" href="https://github.com/w3c/mathml-core/issues/250">
<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>
<style>
@font-face {
font-family: TestFont;
src: url("/fonts/math/largeop-displayoperatorminheight3000-2AFF-axisheight1000.woff");
}
math {
font-family: TestFont;
font-size: 30px;
margin-bottom: 15px; /* to distinguish the tests visually */
}
mspace {
background-color: green;
}
</style>
<script>
setup({ explicit_done: true });
window.addEventListener("load", () => { loadAllFonts().then(runTests); });
// U+2AFF has intrinsic block stretch axis and the symmetric, largeop and movablelimits properties.
//
// We compare the operator top to the mspace bottom (which will always be the alphabetic baseline).
//
// The operator should center around the math axis for symmetric largeops.
// The ascent of the largeop is:
// largeop height / 2 (= 1.5em)
// + AxisHeight (= 1em)
// = 2.5em (75px).
//
// The operator should place on the baseline for non-symmetric largeops,
// so the ascent of the largeop = 3em (90px).
function runTests() {
test(function() {
const container = document.getElementById("container");
[
[ 75, "symmetric largeop is centered around the math axis" ],
[ 90, "non-symmetric largeop is placed on the baseline" ],
].forEach(([ spacing, desc ], i) => {
const mrow = container.children[i].firstElementChild;
let opBbox = mrow.firstElementChild.getBoundingClientRect();
let spaceBbox = mrow.lastElementChild.getBoundingClientRect();
assert_equals(spaceBbox.bottom - opBbox.top, spacing, desc);
})
}, "Placement of operators");
done();
}
</script>
</head>
<body>
<div id="container">
<math display="block">
<mrow>
<mo symmetric="true" largeop="true">⫿</mo>
<mspace height="1em" width="1em"></mspace>
</mrow>
</math>
<math display="block">
<mrow>
<mo symmetric="false" largeop="true">⫿</mo>
<mspace height="1em" width="1em"></mspace>
</mrow>
</math>
</div>
</body>
</html>
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