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+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<meta charset="utf-8">
+<title>Fraction parameters (inline gap between bar and denominator)</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#fractions-mfrac">
+<link rel="match" href="frac-parameters-gap-002-ref.html"/>
+<meta name="assert" content="Element mfrac correctly uses the FractionDenominatorGapMin parameter from the MATH table when denominator contains text.">
+<style>
+ math, mspace, mtext {
+ font-size: 20px;
+ }
+ mtext {
+ font-family: math-text;
+ color: blue;
+ }
+ @font-face {
+ font-family: denominatorgapmin4000-rulethickness1000;
+ src: url("/fonts/math/fraction-denominatorgapmin4000-rulethickness1000.woff");
+ }
+ @font-face {
+ /*
+ math-text has the following properties:
+ - typo/hhea/win metrics: 2.5em ascent and 2.5em descent.
+ - glyph A: .5em ascent and .5em descent.
+ - glyph B: 1em ascent and 0em descent.
+ - glyph C: 0em ascent and 1em descent.
+ */
+ font-family: math-text;
+ src: url("/fonts/math/math-text.woff");
+ }
+ #reference {
+ background: green;
+ }
+ #frame {
+ position: absolute;
+ border-top: 4px solid black;
+ border-bottom: 4px solid black;
+ width: 100%;
+ }
+</style>
+<script src="/mathml/support/fonts.js"></script>
+<script>
+ function runTests() {
+ var div = document.getElementById("frame");
+ var refBox = document.getElementById("reference").getBoundingClientRect();
+ div.style.top = `${refBox.top-2}px`;
+ div.style.height = `${refBox.height-4}px`;
+ document.documentElement.classList.remove('reftest-wait');
+ }
+ window.addEventListener("load", () => { loadAllFonts().then(runTests); });
+</script>
+</head>
+<body>
+ <p>
+ This test passes if the blue squares are aligned:
+ </p>
+ <p>
+ <math style="font-family: denominatorgapmin4000-rulethickness1000;">
+ <!-- This is a dummy mspace element to ensure that the font ascent/descent does not affect the size of the math element. -->
+ <mspace height="2em" depth="20em"/>
+ <!--
+ All the fraction bars must be aligned.
+ The gap between the denominators and bar must be FractionDenominatorGapMin.
+ The gap should be calculated using the exact bounding box of the glyphs.
+ Hence glyphs A, B, C should be rendered at the same vertical position, even if they have different ascent/descent.
+ -->
+ <mfrac>
+ <mspace width="3em"/>
+ <mspace id="reference" width="3em" height=".5em" depth=".5em"/>
+ </mfrac>
+ <mfrac>
+ <mspace width="3em"/>
+ <mtext>A</mtext>
+ </mfrac>
+ <mfrac>
+ <mspace width="3em"/>
+ <mtext>B</mtext>
+ </mfrac>
+ <mfrac>
+ <mspace width="3em"/>
+ <mtext>C</mtext>
+ </mfrac>
+ </math>
+ </p>
+ <div id="frame"></div>
+ <script src="/mathml/support/feature-detection.js"></script>
+ <script>MathMLFeatureDetection.ensure_for_match_reftest("has_mfrac");</script>
+</body>
+</html>