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Bug 1719860 [wpt PR 29620] - [mathml] Fix layout of <mprescripts>, a=testonly 

Automatic update from web-platform-tests
[mathml] Fix layout of <mprescripts>

Currently, NGMathScriptsLayoutAlgorithm::Layout perform the layout of
the <mprescripts> but does not do anything with the result. This CL
fixes that by implementing what is described in the MathML Core spec [1]:

"Place the base and <mprescripts> boxes at inline offsets inline-offset
and with their alphabetic baselines aligned with the alphabetic baseline."

[1] https://w3c.github.io/mathml-core/#base-with-prescripts-and-postscripts

Bug: 1222411, 6606
Change-Id: I24c27e30783a35fbc227753365861c240934bae0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3015504
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: Frédéric Wang <fwang@igalia.com>
Cr-Commit-Position: refs/heads/master@{#900397}

--

wpt-commits: 23d801e755183b7b61d7e79c44f20358c1fec957
wpt-pr: 29620
This commit is contained in:
Frédéric Wang 2021-07-17 09:48:27 +00:00 коммит произвёл moz-wptsync-bot
Родитель 7afacfc98d
Коммит 64e25c15e3
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testing/web-platform/tests/mathml/presentation-markup/scripts/subsup-6.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>mprescripts</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#subscripts-and-superscripts-msub-msup-msubsup">
<meta name="assert" content="Position and size of mprescripts in mmultiscript element.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/fonts.js"></script>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
math, mspace {
font: 25px/1 Ahem;
}
</style>
<script>
/* This test does not use a font with a MATH table and does not verify layout
rules in a very strict way. */
setup({ explicit_done: true });
window.addEventListener("load", () => { loadAllFonts().then(runTests); });
function runTests() {
Array.from(document.getElementsByTagName("mprescripts")).
forEach(prescript => {
let prescript_box = prescript.getBoundingClientRect();
let mmultiscripts = prescript.parentNode;
let name = mmultiscripts.getAttribute("data-name");
test(function() {
assert_true(MathMLFeatureDetection.has_mspace());
var e = 1;
let base_box = mmultiscripts.firstElementChild.getBoundingClientRect();
assert_approx_equals(prescript_box.left, base_box.left, e, `${name}, left`);
assert_approx_equals((prescript_box.top + prescript_box.bottom) / 2, (base_box.top + base_box.bottom) / 2, e, `${name}, top`);
if (name == "prescripts with padding/border/margin") {
assert_approx_equals(prescript_box.width, 2*(15 + 25), e, `${name}, width`);
assert_approx_equals(prescript_box.height, 2*(10 + 20), e, `${name}, height`);
} else {
assert_approx_equals(prescript_box.width, 0, e, `${name}, width`);
assert_approx_equals(prescript_box.height, 0, e, `${name}, height`);
}
}, `mprescripts coordinates and sizes (${name})`);
});
done();
}
</script>
</head>
<body>
<div id="log"></div>
<p>
<math>
<mmultiscripts data-name="2 postscripts">
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mprescripts/>
</mmultiscripts>
</math>
</p>
<p>
<math>
<mmultiscripts data-name="2 prescripts">
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mprescripts/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
</mmultiscripts>
</math>
</p>
<p>
<math>
<mmultiscripts data-name="2 prescripts, 4 postscripts">
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mprescripts/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
</mmultiscripts>
</math>
</p>
<p>
<math>
<mmultiscripts data-name="4 prescripts, 2 postscripts">
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mprescripts/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
</mmultiscripts>
</math>
</p>
<p>
<math>
<mmultiscripts data-name="prescripts with padding/border/margin">
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mprescripts style="background: blue;
padding-top: 10px; border-top: 20px solid green;
padding-bottom: 10px; border-bottom: 20px solid green;
padding-left: 15px; border-left: 25px solid green;
padding-right: 15px; border-right: 25px solid green;
margin-top: 50px;"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
<mspace width="30px" height="15px" depth="15px" style="background: black"/>
</mmultiscripts>
</math>
</p>
</body>
</html>