<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>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(id) {
var element = document.getElementById(id);
var mnBeforeParent = element.parentNode.previousElementSibling;
return element.getBoundingClientRect().left - mnBeforeParent.getBoundingClientRect().right;
}
function spaceAfter(id) {
var element = document.getElementById(id);
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;
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mtext"), emToPx, epsilon);
assert_approx_equals(spaceAfter("mtext"), emToPx, epsilon);
}, "mtext is space-like");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mspace"), emToPx, epsilon);
assert_approx_equals(spaceAfter("mspace"), emToPx, epsilon);
}, "mspace is space-like");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mrow1"), emToPx, epsilon);
assert_approx_equals(spaceAfter("mrow1"), emToPx, epsilon);
}, "space-like mrow");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mrow2"), 0, epsilon);
assert_approx_equals(spaceAfter("mrow2"), 2 * emToPx, epsilon);
}, "non-space-like mrow");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mstyle1"), emToPx, epsilon);
assert_approx_equals(spaceAfter("mstyle1"), emToPx, epsilon);
}, "space-like mstyle");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mstyle2"), 0, epsilon);
assert_approx_equals(spaceAfter("mstyle2"), 2 * emToPx, epsilon);
}, "non-space-like mstyle");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mphantom1"), emToPx, epsilon);
assert_approx_equals(spaceAfter("mphantom1"), emToPx, epsilon);
}, "space-like mphantom");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mphantom2"), 0, epsilon);
assert_approx_equals(spaceAfter("mphantom2"), 2 * emToPx, epsilon);
}, "non-space-like mphantom");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mpadded1"), emToPx, epsilon);
assert_approx_equals(spaceAfter("mpadded1"), emToPx, epsilon);
}, "space-like mpadded");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("mpadded2"), 0, epsilon);
assert_approx_equals(spaceAfter("mpadded2"), 2 * emToPx, epsilon);
}, "non-space-like mpadded");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("merror1"), emToPx, epsilon);
assert_approx_equals(spaceAfter("merror1"), emToPx, epsilon);
}, "space-like merror");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("merror2"), 0, epsilon);
assert_approx_equals(spaceAfter("merror2"), 2 * emToPx, epsilon);
}, "non-space-like merror");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("menclose1"), emToPx, epsilon);
assert_approx_equals(spaceAfter("menclose1"), emToPx, epsilon);
}, "space-like menclose");
test(function() {
assert_true(MathMLFeatureDetection.has_operator_spacing());
assert_approx_equals(spaceBefore("menclose2"), 0, epsilon);
assert_approx_equals(spaceAfter("menclose2"), 2 * emToPx, epsilon);
}, "non-space-like menclose");
done();
}
</script>
</head>
<body>
<div id="log"></div>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mtext is space-like. -->
<mtext class="testedElement" id="mtext">X</mtext>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mspace is space-like. -->
<mspace class="testedElement" id="mspace" width="25px" height="10px"></mspace>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mrow is space-like when it contains only space-like elements. -->
<mrow id="mrow1" class="testedElement">
<mtext>X</mtext>
<mspace width="25px" height="10px"></mspace>
</mrow>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mrow is not space-like when it contains a non space-like element
such as "mn". -->
<mrow id="mrow2" class="testedElement">
<mn>X</mn>
<mspace width="25px" height="10px"></mspace>
</mrow>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mstyle is space-like when it contains only space-like elements. -->
<mstyle id="mstyle1" class="testedElement">
<mtext>X</mtext>
<mspace width="25px" height="10px"></mspace>
</mstyle>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mstyle is not space-like when it contains a non space-like element
such as "mn". -->
<mstyle id="mstyle2" class="testedElement">
<mn>X</mn>
<mspace width="25px" height="10px"></mspace>
</mstyle>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mphantom is space-like when it contains only space-like elements.
-->
<mphantom id="mphantom1" class="testedElement">
<mtext>X</mtext>
<mspace width="25px" height="10px"></mspace>
</mphantom>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mphantom is not space-like when it contains a non space-like
element such as "mn". -->
<mphantom id="mphantom2" class="testedElement">
<mn>X</mn>
<mspace width="25px" height="10px"></mspace>
</mphantom>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mpadded is space-like when it contains only space-like elements. -->
<mpadded id="mpadded1" class="testedElement">
<mtext>X</mtext>
<mspace width="25px" height="10px"></mspace>
</mpadded>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- mpadded is not space-like when it contains a non space-like element
such as "mn". -->
<mpadded id="mpadded2" class="testedElement">
<mn>X</mn>
<mspace width="25px" height="10px"></mspace>
</mpadded>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- merror is space-like when it contains only space-like elements. -->
<merror id="merror1" class="testedElement">
<mtext>X</mtext>
<mspace width="25px" height="10px"></mspace>
</merror>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- merror is not space-like when it contains a non space-like element
such as "mn". -->
<merror id="merror2" class="testedElement">
<mn>X</mn>
<mspace width="25px" height="10px"></mspace>
</merror>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- menclose is space-like when it contains only space-like
elements. -->
<menclose id="menclose1" class="testedElement">
<mtext>X</mtext>
<mspace width="25px" height="10px"></mspace>
</menclose>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
<p>
<math>
<mn>X</mn>
<mrow>
<!-- menclose is not space-like when it contains a non space-like
element such as "mn". -->
<menclose id="menclose2" class="testedElement">
<mn>X</mn>
<mspace width="25px" height="10px"></mspace>
</menclose>
<mo lspace="1em" rspace="0em">X</mo>
</mrow>
<mn>X</mn>
</math>
</p>
</body>
</html>
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