<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Operator dictionary (combining char)</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<link rel="help" href="https://w3c.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
<link rel="help" href="https://w3c.github.io/mathml-core/#dictionary-based-attributes">
<link rel="help" href="https://w3c.github.io/mathml-core/#operator-dictionary">
<link rel="help" href="https://w3c.github.io/mathml-core/#layout-of-mrow">
<link rel="stylesheet" href="./support/operator-dictionary-tests.css"/>
<meta name="assert" content="Verify special handling of 2-char operator with a combining character">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<style>
mo {
color: blue;
}
mn {
background: black;
}
</style>
<script>
setup({ explicit_done: true });
window.addEventListener("load", runTests);
function spaceBetween(element, i, j) {
return element.children[j].getBoundingClientRect().left -
element.children[i].getBoundingClientRect().right;
}
function runTests() {
var epsilon = 1;
var emToPx = 25;
[
"equal",
"vertical_bar",
"left_normal_factor_semidirect_product",
"there_exists",
].forEach(id => {
var div = document.getElementById(id);
var ref = div.getElementsByClassName("reference")[0];
var totalSpaceRef = spaceBetween(ref, 0, 2);
var lspaceRef = spaceBetween(ref, 0, 1);
var rspaceRef = spaceBetween(ref, 1, 2);
Array.from(div.getElementsByClassName("combining")).forEach(element => {
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
var totalSpace = spaceBetween(element, 0, 2);
var lspace = spaceBetween(element, 0, 1);
var rspace = spaceBetween(element, 1, 2);
assert_approx_equals(totalSpace, totalSpaceRef, epsilon);
assert_approx_equals(rspace, rspaceRef, epsilon);
assert_approx_equals(lspace, lspaceRef, epsilon);
}, `Spacing around ${element.children[1].textContent}`);
});
});
done();
}
</script>
</head>
<body>
<div id="log"></div>
<div id="equal">
<p>
<math class="reference">
<mn> </mn>
<mo>=</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo>≠</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo>=⃒</mo>
<mn> </mn>
</math>
</p>
</div>
<div id="vertical_bar">
<p>
<math class="reference">
<mn> </mn>
<mo stretchy="false">|</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo stretchy="false">|̸</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo stretchy="false">|⃒</mo>
<mn> </mn>
</math>
</p>
</div>
<div id="left_normal_factor_semidirect_product">
<p>
<math class="reference">
<mn> </mn>
<mo stretchy="false">⋉</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo stretchy="false">⋉̸</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo stretchy="false">⋉⃒</mo>
<mn> </mn>
</math>
</p>
</div>
<div id="there_exists">
<p>
<math class="reference">
<mn> </mn>
<mo stretchy="false">∃</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo stretchy="false">∄</mo>
<mn> </mn>
</math>
</p>
<p>
<math class="combining">
<mn> </mn>
<mo stretchy="false">∃⃒</mo>
<mn> </mn>
</math>
</p>
</div>
</body>
</html>
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