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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Attribute mapping</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#the-mathvariant-attribute">
<link rel="help" href="https://w3c.github.io/mathml-core/#the-displaystyle-and-scriptlevel-attributes">
<meta name="assert" content="Verify that mathvariant, scriptlevel, displaystyle are mapped to CSS">
<link rel="stylesheet" href="/fonts/ahem.css">
<style>
#container {
/* Ahem font does not have a MATH table so the font-size scale factor
is always 0.71^{computed - inherited math script level} */
font: 100px/1 Ahem;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/mathml-fragments.js"></script>
<script>
setup({ explicit_done: true });
window.addEventListener("load", runTests);
function fontSize(style) {
return parseFloat((/(.+)px/).exec(style.getPropertyValue("font-size"))[1]);
}
function runTests() {
var container = document.getElementById("container");
for (tag in MathMLFragments) {
container.insertAdjacentHTML("beforeend", `<math>${MathMLFragments[tag]}</math>`);
}
Array.from(document.getElementsByClassName("element")).forEach(element => {
var tag = element.tagName;
var style = window.getComputedStyle(element);
test(function() {
assert_equals(style.getPropertyValue("text-transform"),
tag === "mi" ? "math-auto" : "none",
"no attribute");
element.setAttribute("mathvariant", "fraktur");
assert_equals(style.getPropertyValue("text-transform"), "math-fraktur", "attribute specified");
element.setAttribute("mathvariant", "DoUbLe-StRuCk");
assert_equals(style.getPropertyValue("text-transform"), "math-double-struck", "case insensitive");
}, `mathvariant on the ${tag} element is mapped to CSS text-transform`)
test(function() {
// none and mprescripts appear as scripts
assert_equals(style.getPropertyValue("math-depth"), tag === "none" || tag === "mprescripts" ? "1" : "0", "no attribute");
var absoluteScriptlevel = 2;
element.setAttribute("scriptlevel", absoluteScriptlevel);
assert_equals(style.getPropertyValue("math-depth"), "" + absoluteScriptlevel, "attribute specified <U>");
var positiveScriptlevelDelta = 1;
element.setAttribute("scriptlevel", `+${positiveScriptlevelDelta}`);
assert_equals(style.getPropertyValue("math-depth"), "" + positiveScriptlevelDelta, "attribute specified +<U>");
var negativeScriptlevelDelta = -3;
element.setAttribute("scriptlevel", `${negativeScriptlevelDelta}`);
assert_equals(style.getPropertyValue("math-depth"), "" + negativeScriptlevelDelta, "attribute specified -<U>");
element.setAttribute("scriptlevel", absoluteScriptlevel);
element.setAttribute("mathsize", "42px");
assert_approx_equals(fontSize(style), 42, 1, "mathsize wins over scriptlevel");
}, `scriptlevel on the ${tag} element is mapped to math-depth(...)`);
test(function() {
// none and mprescripts appear as scripts
let expected = 0;
element.setAttribute("scriptlevel", "" + expected);
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "no attribute");
element.setAttribute("scriptlevel", " +1");
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
element.setAttribute("scriptlevel", " + 1");
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
element.setAttribute("scriptlevel", "2.0");
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
element.setAttribute("scriptlevel", "-3\"");
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
element.setAttribute("scriptlevel", "200px");
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
element.setAttribute("scriptlevel", "add(2)");
assert_equals(style.getPropertyValue("math-depth"), "" + expected, "invalid scriptlevel value");
}, `invalid scriptlevel values on the ${tag} element are not mapped to math-depth(...)`);
test(function() {
assert_equals(style.getPropertyValue("math-style"), "compact", "no attribute");
element.setAttribute("displaystyle", "true");
assert_equals(style.getPropertyValue("math-style"), "normal", "attribute specified");
element.setAttribute("displaystyle", "TrUe");
assert_equals(style.getPropertyValue("math-style"), "normal", "case insensitive");
}, `displaystyle on the ${tag} element is mapped to CSS math-style`);
});
done();
}
</script>
</head>
<body>
<div id="log"></div>
<div id="container">
<math class="element"></math>
</div>
</body>
</html>
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