mirror of
https://github.com/servo/servo.git
synced 2025-06-27 18:43:40 +01:00
130 lines
3.1 KiB
HTML
130 lines
3.1 KiB
HTML
<!DOCTYPE html>
|
|
<meta charset="UTF-8">
|
|
<title>aspect-ratio interpolation</title>
|
|
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio">
|
|
<meta name="assert" content="aspect-ratio supports animation">
|
|
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<script src="/css/support/interpolation-testcommon.js"></script>
|
|
|
|
<style>
|
|
.target {
|
|
font-size: 16px;
|
|
background-color: black;
|
|
width: 10px;
|
|
aspect-ratio: 0.5;
|
|
}
|
|
</style>
|
|
|
|
<body>
|
|
<template id="target-template">
|
|
<div class="container">
|
|
<div class="target"></div>
|
|
</div>
|
|
</template>
|
|
</body>
|
|
|
|
<script>
|
|
test_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: '0.5',
|
|
to: '2',
|
|
}, [
|
|
{at: -0.5, expect: '0.25 / 1'},
|
|
{at: 0, expect: '0.5 / 1'},
|
|
{at: 0.5, expect: '1 / 1'},
|
|
{at: 1, expect: '2 / 1'},
|
|
{at: 1.5, expect: '4 / 1'}
|
|
]);
|
|
|
|
test_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: '1 / 2',
|
|
to: '2 / 1',
|
|
}, [
|
|
{at: -0.5, expect: '0.25 / 1'},
|
|
{at: 0, expect: '0.5 / 1'},
|
|
{at: 0.5, expect: '1 / 1'},
|
|
{at: 1, expect: '2 / 1'},
|
|
{at: 1.5, expect: '4 / 1'}
|
|
]);
|
|
|
|
// Test neutral keyframe
|
|
test_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: '',
|
|
to: '2 / 1',
|
|
}, [
|
|
{at: -0.5, expect: '0.25 / 1'},
|
|
{at: 0, expect: '0.5 / 1'},
|
|
{at: 0.5, expect: '1 / 1'},
|
|
{at: 1, expect: '2 / 1'},
|
|
{at: 1.5, expect: '4 / 1'}
|
|
]);
|
|
|
|
test_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: 'auto 1 / 2',
|
|
to: 'auto 2 / 1',
|
|
}, [
|
|
{at: -0.5, expect: 'auto 0.25 / 1'},
|
|
{at: 0, expect: 'auto 0.5 / 1'},
|
|
{at: 0.5, expect: 'auto 1 / 1'},
|
|
{at: 1, expect: 'auto 2 / 1'},
|
|
{at: 1.5, expect: 'auto 4 / 1'}
|
|
]);
|
|
|
|
test_no_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: 'auto',
|
|
to: '2 / 1',
|
|
});
|
|
|
|
test_no_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: 'auto 1 / 1',
|
|
to: '2 / 1',
|
|
});
|
|
|
|
// If either number in the ratio is 0 or infinite, it represents a degenerate
|
|
// ratio and will not be interpolated:
|
|
// https://drafts.csswg.org/css-values-4/#combine-ratio
|
|
test_no_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: '1 / 0',
|
|
to: '1 / 1',
|
|
});
|
|
test_no_interpolation({
|
|
property: 'aspect-ratio',
|
|
from: '1 / 1',
|
|
to: '0 / 1',
|
|
});
|
|
|
|
// Addition of <ratio>s is not possible.
|
|
// https://drafts.csswg.org/css-values/#combine-ratio
|
|
//
|
|
// And if a value type does not define a specific procedure for addition or is
|
|
// defined as not additive, its addition operation is simply Vresult = Va.
|
|
// (The first value is Va, the second value is Vb, and the result is Vresult.)
|
|
// https://drafts.csswg.org/css-values-4/#not-additive,
|
|
//
|
|
// So in this test case:
|
|
// 1. The 1st keyframe: { aspectRatio: 0.5/1, composite: 'replace', offset: 0 }
|
|
// 2. The 2nd keyframe: { aspectRatio: 1/1, composite: 'add', offset: 1 }
|
|
// and the underlying value is 2/1. Based on the spec, the composited from_value
|
|
// is 0.5/1 (because we just replace it), and the composited to_value is 2/1
|
|
// (because we use Va as the result value).
|
|
test_composition({
|
|
property: 'aspect-ratio',
|
|
underlying: '2 / 1',
|
|
replaceFrom: '0.5 / 1',
|
|
addTo: '1 / 1',
|
|
}, [
|
|
{at: 0, expect: '0.5 / 1'},
|
|
{at: 0.5, expect: '1 / 1'},
|
|
{at: 1, expect: '2 / 1'}
|
|
]);
|
|
|
|
</script>
|
|
</body>
|