<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Non space-like elements</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<link rel="help" href="https://w3c.github.io/mathml-core/#definition-of-space-like-elements">
<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/#layout-of-mrow">
<meta name="assert" content="Verify definition of space-like elements">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<style>
/* Default spacing of operator 'X' is 0.2777777777777778em so quite different
from the measured/specified 0em and 1em. */
math, math * {
font: 25px/1 Ahem;
}
mn {
color: black;
}
mo {
color: yellow;
}
.testedElement, .testedElement * {
color: blue !important;
background: blue !important;
}
</style>
<script>
function spaceBefore(element) {
var mnBeforeParent = element.parentNode.previousElementSibling;
return element.getBoundingClientRect().left - mnBeforeParent.getBoundingClientRect().right;
}
function spaceAfter(element) {
var mnAfterParent = element.parentNode.nextElementSibling;
return mnAfterParent.getBoundingClientRect().left - element.getBoundingClientRect().right;
}
setup({ explicit_done: true });
window.addEventListener("load", runTests);
function runTests() {
var epsilon = 1;
var emToPx = 25;
Array.from(document.querySelectorAll(".testedElement")).forEach(el => {
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore(el), 0, epsilon);
assert_approx_equals(spaceAfter(el), 2 * emToPx, epsilon);
}, `${el.tagName} is not space-like`);
});
done();
}
</script>
</head>
<body>
<div id="log"></div>
<p>
<math>
<mn>X</mn>
<mrow>
<mroot class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
</mroot>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mfrac class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
</mfrac>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mi class="testedElement">X</mi>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mmultiscripts class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
<mtext>X</mtext>
</mmultiscripts>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mn class="testedElement">X</mn>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mo class="testedElement" lspace="0" rspace="0">X</mo>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mover class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
</mover>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<munder class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
</munder>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<ms class="testedElement">X</ms>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<munderover class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
<mtext>X</mtext>
</munderover>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<msup class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
</msup>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<msub class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
</msub>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<msubsup class="testedElement">
<mtext>X</mtext>
<mtext>X</mtext>
<mtext>X</mtext>
</msubsup>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<msqrt class="testedElement">
<mtext>X</mtext>
</msqrt>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<mtable class="testedElement">
<mtr>
<mtd>
<mtext>X</mtext>
</mtd>
</mtr>
</mtable>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
</body>
</html>
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