<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Edge cases for minsize and maxsize</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<link rel="help" href="https://w3c.github.io/mathml-core/#dictionary-based-attributes">
<meta name="assert" content="Verify edge cases for minsize and maxsize .">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/fonts.js"></script>
<style>
math {
font: 25px/1 Ahem;
}
@font-face {
font-family: operators;
src: url("/fonts/math/operators.woff"); /* AxisHeight == 0 */
}
mo {
font-family: operators;
}
@font-face {
font-family: stretchy;
src: url("/fonts/math/stretchy.woff");
}
</style>
<script>
setup({ explicit_done: true });
window.addEventListener("load", () => { loadAllFonts().then(runTests); });
function runTests() {
var epsilon = 1;
var emToPx = 25;
test(function() {
assert_approx_equals(document.getElementById("negative_minsize").getBoundingClientRect().height, 5 * emToPx, epsilon);
}, `minsize < 0 is treated as 0`);
test(function() {
assert_approx_equals(document.getElementById("maxsize_less_than_minsize").getBoundingClientRect().height, 7 * emToPx, epsilon);
}, `maxsize < minsize is treated as maxsize = minsize`);
test(function() {
assert_less_than(document.getElementById("minsize_less_than_negative_maxsize").getBoundingClientRect().height, 2 * emToPx);
}, `minsize < maxsize < 0 is treated as maxsize = minsize = 0`);
test(function() {
assert_approx_equals(document.getElementById("zero_target_size_with_minsize").getBoundingClientRect().height, 2 * emToPx, epsilon);
assert_approx_equals(document.getElementById("zero_target_size_with_minsize").getBoundingClientRect().bottom - document.getElementById("zero_target_size_with_minsize_math_axis").getBoundingClientRect().bottom, emToPx, epsilon);
}, `target size = 0 is treated as Tascent = Tdescent = minsize/2`);
test(function() {
assert_approx_equals(document.getElementById("percent_minsize").getBoundingClientRect().height, 12 * emToPx, epsilon, "percent minsize");
assert_approx_equals(document.getElementById("percent_maxsize").getBoundingClientRect().height, 3 * emToPx, epsilon, "percent maxsize");
}, `minsize/maxsize percentages are relative to the unstretched size`);
test(function() {
// - The unstretched size is a lower bound for the stretched size, so
// specifying a lower minsize has no effect. This test only verifies
// that the default minsize is at most 100% the unstretched size.
const unstretched_size = 1 * emToPx;
assert_approx_equals(document.getElementById("default_minsize").getBoundingClientRect().height, unstretched_size, epsilon, "default minsize is 100%");
// Previous version of MathML Core were defining minsize as 1em rather
// than 100% the unstretched size. So try the same test with a .5em
// unstretched size.
const unstretched_size_2 = .5 * emToPx;
assert_approx_equals(document.getElementById("default_minsize_2").getBoundingClientRect().height, unstretched_size_2, epsilon, "default minsize is not 1em");
// - The target size is an upper bound for the stretched size, so
// specifying a larger maxsize has no effect. This test only
// verifies that the default maxsize is at least 300 times the
// unstretched size.
assert_approx_equals(document.getElementById("default_maxsize").getBoundingClientRect().height, 300 * emToPx, epsilon, "default maxsize is infinity");
}, `default minsize/maxsize values`);
done();
}
</script>
</head>
<body>
<div id="log"></div>
<p>
<math>
<mrow>
<mspace width="1em" height="5em" style="background: blue"/>
<mo id="negative_minsize" minsize="-10em" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height="5em" style="background: blue"/>
<mo id="maxsize_less_than_minsize" minsize="7em" maxsize="2em" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height="5em" style="background: blue"/>
<mo id="minsize_less_than_negative_maxsize" minsize="-2em" maxsize="-1em" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace id="zero_target_size_with_minsize_math_axis" width="1em" height="0em" style="background: blue"/>
<mo id="zero_target_size_with_minsize" minsize="2em" stretchy="true" symmetric="true">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height="6em" style="background: blue"/>
<mo id="percent_minsize" minsize="1200%" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height="6em" style="background: blue"/>
<mo id="percent_maxsize" maxsize="300%" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height=".5em" style="background: blue"/>
<mo id="default_minsize" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height=".25em" style="background: blue"/>
<mo style="font-family: stretchy" id="default_minsize_2" stretchy="true" symmetric="false">↨</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
<p>
<math>
<mrow>
<mspace width="1em" height="300em" style="background: blue"/>
<mo id="default_maxsize" stretchy="true" symmetric="false">⥯</mo>
<mpadded height="0" depth="0"><mn><!-- not space like --></mn></mpadded>
</mrow>
</math>
</p>
</body>
</html>
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