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<!DOCTYPE html>
<meta charset="UTF-8">
<title>font-palette interpolation</title>
<link rel="help" href="https://www.w3.org/TR/css-fonts-4/#propdef-font-palette">
<meta name="assert" content="Font-palette should be animated smoothly.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<style>
@font-palette-values --custom-palette {
font-family: "Color font";
base-palette: 0;
override-colors: 1 #000000;
}
.container {
font-palette: light;
}
.container2 {
font-palette: dark;
}
.target {
display: inline-block;
font: 100px sans-serif;
font-palette: normal;
}
.expected {
color: green;
margin-right: 30px;
}
</style>
<body>
<template id="target-template">
<span class="container">
<div class="target">TT</div>
</span>
</template>
<span id="inv-container" class="container">
<div id="inv-target" class="target">TT</div>
</span>
</body>
<script>
test_interpolation({
property: 'font-palette',
from: 'light',
to: 'dark'
}, [
{at: -2, expect: 'light'},
{at: -0.25, expect: 'light'},
{at: 0, expect: 'light'},
{at: 0.3, expect: 'palette-mix(in oklab, light, dark 30%)'},
{at: 0.6, expect: 'palette-mix(in oklab, light, dark 60%)'},
{at: 1, expect: 'dark'},
{at: 1.5, expect: 'dark'},
]);
test_interpolation({
property: 'font-palette',
from: 'initial',
to: 'inherit'
}, [
{at: -2, expect: 'normal'},
{at: -0.25, expect: 'normal'},
{at: 0, expect: 'normal'},
{at: 0.3, expect: 'palette-mix(in oklab, normal, light 30%)'},
{at: 0.6, expect: 'palette-mix(in oklab, normal, light 60%)'},
{at: 1, expect: 'light'},
{at: 1.5, expect: 'light'},
]);
test_interpolation({
property: 'font-palette',
from: '--custom-palette',
to: 'normal'
}, [
{at: -2, expect: '--custom-palette'},
{at: -0.25, expect: '--custom-palette'},
{at: 0, expect: '--custom-palette'},
{at: 0.3, expect: 'palette-mix(in oklab, --custom-palette, normal 30%)'},
{at: 0.6, expect: 'palette-mix(in oklab, --custom-palette, normal 60%)'},
{at: 1, expect: 'normal'},
{at: 1.5, expect: 'normal'},
]);
/* palette-mix function for the equal endpoints should be simplified. */
test_interpolation({
property: 'font-palette',
from: 'initial',
to: 'normal'
}, [
{at: -2, expect: 'normal'},
{at: -0.25, expect: 'normal'},
{at: 0, expect: 'normal'},
{at: 0.3, expect: 'normal'},
{at: 0.6, expect: 'normal'},
{at: 1, expect: 'normal'},
{at: 1.5, expect: 'normal'},
]);
test(t => {
var container = document.getElementById('inv-container');
var target = document.getElementById('inv-target');
var anim = target.animate({ fontPalette: ['normal', 'inherit'] }, 1000);
anim.pause();
anim.currentTime = 500;
assert_equals(getComputedStyle(target).fontPalette, 'palette-mix(in oklab, normal, light)');
container.setAttribute('class', 'container2');
assert_equals(getComputedStyle(target).fontPalette, 'palette-mix(in oklab, normal, dark)');
}, "An interpolation to inherit updates correctly on a parent style change.");
test(t => {
var target = document.getElementById('inv-target');
target.animate(
{ fontPalette: ['light', 'normal'] },
{
duration: 1000
}
);
target.animate(
{ fontPalette: ['normal', 'dark'] },
{
duration: 1000,
/* Should work like 'replace', since <Color> type is not additive,
compare: https://drafts.csswg.org/css-values-4/#combine-colors. */
composite: "add"
}
);
document.getAnimations().forEach((animation) => {
animation.pause();
animation.currentTime = 500;
});
assert_equals(getComputedStyle(target).fontPalette,
"palette-mix(in oklab, normal, dark)");
}, "Test additive animations");
</script>
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