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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>MathML and size containment</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/mathml-fragments.js"></script>
<style>
/* Revert style specified in the UA style sheet that changes box size. */
merror { border: 0; }
mfrac { padding: 0; }
</style>
<script>
setup({ explicit_done: true });
window.addEventListener("load", runTests);
function runTests() {
for (tag in MathMLFragments) {
if (!FragmentHelper.isValidChildOfMrow(tag) ||
FragmentHelper.isEmpty(tag))
continue;
// TODO(https://github.com/w3c/mathml-core/issues/199): Check/decide how
// size containment behave for these cases:
// - table layout.
// - radical layout.
// - contain-intrinsic-block-size.
// - operators width special drawing (stretchy/largop).
if (tag == "mroot" || tag == "msqrt" || tag == "mtable") {
continue;
}
document.body.insertAdjacentHTML("beforeend", `<div style="position: absolute;">\
<div style="display: inline-block;"><math>${MathMLFragments[tag]}</math></div>\
</div>`);
let div = document.body.lastElementChild;
let elementContainer = div.firstElementChild;
let element = FragmentHelper.element(elementContainer);
FragmentHelper.forceNonEmptyDescendants(element);
const style = `contain: size; contain-intrinsic-inline-size: 111px;`;
element.setAttribute("style", style)
if (tag === "mo") {
element.setAttribute("lspace", "0");
element.setAttribute("rspace", "0");
}
const elementContainerWidth = elementContainer.getBoundingClientRect().width;
const elementBox = element.getBoundingClientRect();
test(function() {
assert_true(MathMLFeatureDetection[`has_${tag}`](), `${tag} is supported`);
assert_equals(elementContainerWidth, 111);
}, `intrinsic size of ${tag} with ${style}`);
test(function() {
assert_true(MathMLFeatureDetection[`has_${tag}`](), `${tag} is supported`);
assert_equals(elementBox.width, 111);
}, `inline-size of ${tag} with ${style}`);
div.style = "display: none;"; // Hide the div after measurement.
}
done();
}
</script>
</head>
<body>
<div id="log"></div>
</body>
</html>
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