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<!DOCTYPE html>
<html class="reftest-wait">
<head>
<meta charset="utf-8">
<title>Painting of vertical assembly</title>
<link rel="match" href="painting-stretchy-operator-001-ref.html">
<link rel="help" href="https://w3c.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
<link rel="help" href="https://crbug.com/1409380">
<meta name="assert" content="Verify that vertical glyph assemblies are painted at the position of their bounding box.">
<script src="/mathml/support/fonts.js"></script>
<style>
.container {
font-size: 50px;
position: absolute;
left: 1em;
top: 1em;
padding: 5px;
background: green;
width: 4em;
height: 8em;
}
mo {
color: green;
background: red;
}
.frame {
position: absolute;
box-sizing: border-box;
border: 2px solid green;
}
@font-face {
font-family: stretchy;
src: url("/fonts/math/stretchy.woff");
}
@font-face {
font-family: stretchy-centered-on-baseline;
src: url("/fonts/math/stretchy-centered-on-baseline.woff");
}
</style>
<script>
function runTests() {
// Add a green frame around mo to avoid antialisasing/rounding issues.
Array.from(document.getElementsByTagName('mo')).forEach(mo => {
let box = mo.getBoundingClientRect();
let div = document.createElement("div");
div.className = 'frame';
div.style.left = `${box.left-1}px`;
div.style.top = `${box.top-1}px`;
div.style.width = `${box.width+1}px`;
div.style.height = `${box.height+1}px`;
document.body.appendChild(div);
});
document.documentElement.classList.remove("reftest-wait");
}
window.addEventListener("load", () => { loadAllFonts().then(runTests); });
</script>
<body>
<p>This test passes if you see a green rectangle and no red.</p>
<div class="container">
<!-- This font uses assembly glyphs with zero ink descent, which is what
Latin Modern Math does for U+007C VERTICAL LINE. -->
<math style="font-family: stretchy">
<mspace height="4em"/>
<mo stretchy="true" symmetric="true">⥜</mo>
</math>
<!-- This font uses assembly glyphs with non-zero ink descent, which is what
Cambria Math does for U+007C VERTICAL LINE. -->
<math style="font-family: stretchy-centered-on-baseline">
<mspace height="4em"/>
<mo stretchy="true" symmetric="true">⥜</mo>
</math>
</div>
</body>
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