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LibWeb: Parse widows CSS property

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This commit is contained in:
Callum Law
2025-09-27 02:44:54 +12:00
committed by Sam Atkins
parent 3d85532752
commit c4d6deb5c7
Notes: github-actions[bot] 2025-09-26 15:36:06 +00:00 
Author: https://github.com/Calme1709
Commit: https://github.com/LadybirdBrowser/ladybird/commit/c4d6deb5c75
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6313
Reviewed-by: https://github.com/AtkinsSJ ✅
14 changed files with 416 additions and 8 deletions
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112
Tests/LibWeb/Text/input/wpt-import/css/css-break/animation/widows-interpolation.html Normal file
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<!DOCTYPE html>
<meta charset="UTF-8">
<title>widows interpolation</title>
<link rel="help" href="https://drafts.csswg.org/css-break-3/#widows-orphans">
<meta name="assert" content="widows supports animation by computed value type">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../css/support/interpolation-testcommon.js"></script>
<style>
.parent {
widows: 30;
}
.target {
widows: 10;
}
</style>
<body></body>
<script>
test_interpolation({
property: 'widows',
from: neutralKeyframe,
to: '20',
}, [
{at: -3, expect: '1'},
{at: -2.5, expect: '1'},
{at: -0.5, expect: '5'},
{at: 0, expect: '10'},
{at: 0.3, expect: '13'},
{at: 0.6, expect: '16'},
{at: 1, expect: '20'},
{at: 1.5, expect: '25'},
]);
test_interpolation({
property: 'widows',
from: 'initial',
to: '20',
}, [
{at: -3, expect: '1'},
{at: -2.5, expect: '1'},
{at: -0.5, expect: '1'},
{at: 0, expect: '2'},
{at: 0.3, expect: '7'},
{at: 0.6, expect: '13'},
{at: 1, expect: '20'},
{at: 1.5, expect: '29'},
]);
test_interpolation({
property: 'widows',
from: 'inherit',
to: '20',
}, [
{at: -3, expect: '60'},
{at: -2.5, expect: '55'},
{at: -0.5, expect: '35'},
{at: 0, expect: '30'},
{at: 0.3, expect: '27'},
{at: 0.6, expect: '24'},
{at: 1, expect: '20'},
{at: 1.5, expect: '15'},
]);
test_interpolation({
property: 'widows',
from: 'unset',
to: '20',
}, [
{at: -3, expect: '60'},
{at: -2.5, expect: '55'},
{at: -0.5, expect: '35'},
{at: 0, expect: '30'},
{at: 0.3, expect: '27'},
{at: 0.6, expect: '24'},
{at: 1, expect: '20'},
{at: 1.5, expect: '15'},
]);
test_interpolation({
property: 'widows',
from: '10',
to: '20'
}, [
{at: -3.0, expect: '1'},
{at: -2.5, expect: '1'},
{at: -0.5, expect: '5'},
{at: 0, expect: '10'},
{at: 0.3, expect: '13'},
{at: 0.6, expect: '16'},
{at: 1, expect: '20'},
{at: 1.5, expect: '25'}
]);
test_interpolation({
property: 'widows',
from: '2',
to: '4'
}, [
{at: -3.0, expect: '1'},
{at: -2.5, expect: '1'},
{at: -0.5, expect: '1'},
{at: 0, expect: '2'},
{at: 0.3, expect: '3'},
{at: 0.6, expect: '3'},
{at: 1, expect: '4'},
{at: 1.5, expect: '5'}
]);
</script>

20
Tests/LibWeb/Text/input/wpt-import/css/css-break/parsing/widows-computed.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Fragmentation Module Level 3: getComputedStyle().widows</title>
<link rel="help" href="https://drafts.csswg.org/css-break/#propdef-widows">
<meta name="assert" content="widows computed value is specified integer.">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../css/support/computed-testcommon.js"></script>
</head>
<body>
<div id="target"></div>
<script>
test_computed_value("widows", "1");
test_computed_value("widows", "234");
test_computed_value("widows", "calc(1 + 234)", "235");
</script>
</body>
</html>

22
Tests/LibWeb/Text/input/wpt-import/css/css-break/parsing/widows-invalid.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Fragmentation Module Level 3: parsing widows with invalid values</title>
<link rel="help" href="https://drafts.csswg.org/css-break/#propdef-widows">
<meta name="assert" content="widows supports only the grammar '<integer>'.">
<meta name="assert" content="Negative values and zero are invalid.">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../css/support/parsing-testcommon.js"></script>
</head>
<body>
<script>
test_invalid_value("widows", "auto");
test_invalid_value("widows", "1 234");
test_invalid_value("widows", "-234");
test_invalid_value("widows", "-1");
test_invalid_value("widows", "0");
</script>
</body>
</html>

19
Tests/LibWeb/Text/input/wpt-import/css/css-break/parsing/widows-valid.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Fragmentation Module Level 3: parsing widows with valid values</title>
<link rel="help" href="https://drafts.csswg.org/css-break/#propdef-widows">
<meta name="assert" content="widows supports the full grammar '<integer>'.">
<meta name="assert" content="Negative values and zero are invalid.">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../css/support/parsing-testcommon.js"></script>
</head>
<body>
<script>
test_valid_value("widows", "1");
test_valid_value("widows", "234");
</script>
</body>
</html>