Implement animation behavior of the interpolate-size CSS property.

This implements the animation behavior of the interpolate-size CSS property to enable CSS animations between sizing keywords when possible, and removes a feature flag (and corresponding virtual test suite) that enabled the same. For more on the interpolate-size property, see: https://chromestatus.com/feature/5196713071738880 https://drafts.csswg.org/css-values-5/#interpolate-size w3c/csswg-drafts#10294 Bug: 313072 Fixed: 349903574, 346977015 Change-Id: Ie4214af5ff5ea1e3253893dbcc5567e9026f1a06
web-platform-tests · Jul 17, 2024 · 8a7b483 · 8a7b483
1 parent 59497e6
commit 8a7b483
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diff --git a/css/css-sizing/animation/height-composition.html b/css/css-sizing/animation/height-composition.html
@@ -7,6 +7,14 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/css/support/interpolation-testcommon.js"></script>
+<style>
+.target::before {
+  display: block;
+  content: "";
+  width: 75px;
+  height: 75px;
+}
+</style>
 
 <body>
 <script>
@@ -74,5 +82,18 @@
   {at: 1, expect: 'auto'},
   {at: 1.5, expect: 'auto'},
 ]);
+
+test_composition({
+  property: 'height',
+  underlying: 'min-content', /* ignored */
+  addFrom: '100px',
+  addTo: '200px',
+}, [
+  {at: -0.3, expect: '70px'},
+  {at: 0, expect: '100px'},
+  {at: 0.5, expect: '150px'},
+  {at: 1, expect: '200px'},
+  {at: 1.5, expect: '250px'},
+]);
 </script>
 </body>
diff --git a/css/css-sizing/animation/max-height-composition.html b/css/css-sizing/animation/max-height-composition.html
@@ -74,5 +74,18 @@
   {at: 1, expect: 'none'},
   {at: 1.5, expect: 'none'},
 ]);
+
+test_composition({
+  property: 'max-height',
+  underlying: '100px',
+  addFrom: 'min-content',
+  addTo: '100px',
+}, [
+  {at: -0.3, expect: 'min-content'},
+  {at: 0, expect: 'min-content'},
+  {at: 0.5, expect: '200px'},
+  {at: 1, expect: '200px'},
+  {at: 1.5, expect: '200px'},
+]);
 </script>
 </body>
diff --git a/css/css-sizing/animation/max-width-composition.html b/css/css-sizing/animation/max-width-composition.html
@@ -74,5 +74,18 @@
   {at: 1, expect: 'none'},
   {at: 1.5, expect: 'none'},
 ]);
+
+test_composition({
+  property: 'max-width',
+  underlying: 'fit-content',
+  addFrom: '100px',
+  addTo: '200px',
+}, [
+  {at: -0.3, expect: '70px'},
+  {at: 0, expect: '100px'},
+  {at: 0.5, expect: '150px'},
+  {at: 1, expect: '200px'},
+  {at: 1.5, expect: '250px'},
+]);
 </script>
 </body>
diff --git a/css/css-sizing/animation/min-height-composition.html b/css/css-sizing/animation/min-height-composition.html
@@ -74,5 +74,18 @@
   {at: 1, expect: 'auto'},
   {at: 1.5, expect: 'auto'},
 ]);
+
+test_composition({
+  property: 'min-height',
+  underlying: '100px', /* ignored */
+  addFrom: 'min-content',
+  addTo: 'max-content',
+}, [
+  {at: -0.3, expect: 'min-content'},
+  {at: 0, expect: 'min-content'},
+  {at: 0.5, expect: 'max-content'},
+  {at: 1, expect: 'max-content'},
+  {at: 1.5, expect: 'max-content'},
+]);
 </script>
 </body>
diff --git a/css/css-sizing/animation/min-width-composition.html b/css/css-sizing/animation/min-width-composition.html
@@ -74,5 +74,18 @@
   {at: 1, expect: 'auto'},
   {at: 1.5, expect: 'auto'},
 ]);
+
+test_composition({
+  property: 'min-width',
+  underlying: 'min-content',
+  addFrom: 'max-content',
+  addTo: 'fit-content',
+}, [
+  {at: -0.3, expect: 'max-content'},
+  {at: 0, expect: 'max-content'},
+  {at: 0.5, expect: 'fit-content'},
+  {at: 1, expect: 'fit-content'},
+  {at: 1.5, expect: 'fit-content'},
+]);
 </script>
 </body>
diff --git a/css/css-sizing/animation/width-composition.html b/css/css-sizing/animation/width-composition.html
@@ -7,6 +7,14 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/css/support/interpolation-testcommon.js"></script>
+<style>
+.target::before {
+  display: block;
+  content: "";
+  width: 75px;
+  height: 125px;
+}
+</style>
 
 <body>
 <script>
@@ -74,5 +82,20 @@
   {at: 1, expect: 'auto'},
   {at: 1.5, expect: 'auto'},
 ]);
+
+test_composition({
+  property: 'width',
+  underlying: '100px',
+  addFrom: '100px',
+  addTo: 'min-content', /* 75px, not compatible */
+}, [
+  {at: -0.3, expect: '200px'},
+  {at: 0, expect: '200px'},
+  {at: 0.5, expect: '75px'},
+  {at: 1, expect: '75px'},
+  {at: 1.5, expect: '75px'},
+]);
+</script>
+</body>
 </script>
 </body>
diff --git a/css/css-values/calc-size/animation/interpolate-size-height-composition.html b/css/css-values/calc-size/animation/interpolate-size-height-composition.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>height composition with interpolate-size: allow-keywords</title>
+<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#propdef-height">
+<link rel="help" href="https://drafts.csswg.org/css-values-5/#interpolate-size">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/interpolation-testcommon.js"></script>
+<style>
+:root {
+  interpolate-size: allow-keywords;
+}
+.parent {
+  height: 200px;
+}
+.target {
+  width: 100px;
+  height: 150px;
+}
+.target::before {
+  display: block;
+  content: "";
+  width: 100px;
+  height: 50px;
+}
+</style>
+
+<body>
+<script>
+test_composition({
+  property: 'height',
+  underlying: 'fit-content', /* 50px */
+  addFrom: '100px',
+  addTo: '200px',
+}, [
+  {at: -0.3, expect: '120px'},
+  {at: 0, expect: '150px'},
+  {at: 0.5, expect: '200px'},
+  {at: 1, expect: '250px'},
+  {at: 1.5, expect: '300px'},
+]);
+
+test_composition({
+  property: 'height',
+  underlying: 'fit-content', /* ignored because the keywords aren't compatible */
+  addFrom: 'min-content', /* 50px */
+  addTo: '200px',
+}, [
+  {at: -0.3, expect: '5px'},
+  {at: 0, expect: '50px'},
+  {at: 0.5, expect: '125px'},
+  {at: 1, expect: '200px'},
+  {at: 1.5, expect: '275px'},
+]);
+</script>
+</body>
diff --git a/css/css-values/calc-size/animation/interpolate-size-height-interpolation.html b/css/css-values/calc-size/animation/interpolate-size-height-interpolation.html
@@ -0,0 +1,158 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>height interpolation with interpolate-size: allow-keywords</title>
+<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#propdef-height">
+<link rel="help" href="https://drafts.csswg.org/css-values-5/#interpolate-size">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/interpolation-testcommon.js"></script>
+
+<style>
+:root {
+  interpolate-size: allow-keywords;
+}
+.parent {
+  height: 200px;
+}
+.target {
+  width: 100px;
+  height: 150px;
+}
+.target::before {
+  display: block;
+  content: "";
+  width: 100px;
+  height: 50px;
+}
+</style>
+
+<body></body>
+
+<script>
+
+test_interpolation({
+  property: 'height',
+  from: 'initial', /* auto, which is 50px */
+  to: '90px',
+}, [
+  {at: -0.3, expect: '38px'},
+  {at: 0, expect: '50px'},
+  {at: 0.3, expect: '62px'},
+  {at: 0.6, expect: '74px'},
+  {at: 1, expect: '90px'},
+  {at: 1.5, expect: '110px'}
+]);
+
+test_interpolation({
+  property: 'height',
+  from: 'unset', /* auto, which is 50px */
+  to: '10px',
+}, [
+  {at: -0.3, expect: '62px'},
+  {at: 0, expect: '50px'},
+  {at: 0.3, expect: '38px'},
+  {at: 0.6, expect: '26px'},
+  {at: 1, expect: '10px'},
+  {at: 1.5, expect: '0px'} // height can't be negative
+]);
+
+test_interpolation({
+  property: 'height',
+  from: '0px',
+  to: 'auto' /* 50px */
+}, [
+  {at: -0.3, expect: '0px'}, // height can't be negative
+  {at: 0, expect: '0px'},
+  {at: 0.3, expect: '15px'},
+  {at: 0.6, expect: '30px'},
+  {at: 1, expect: '50px'},
+  {at: 1.5, expect: '75px'}
+]);
+
+test_interpolation({
+  property: 'height',
+  from: 'auto', /* 50px */
+  to: '10px',
+}, [
+  {at: -0.3, expect: '62px'},
+  {at: 0, expect: '50px'},
+  {at: 0.3, expect: '38px'},
+  {at: 0.6, expect: '26px'},
+  {at: 1, expect: '10px'},
+  {at: 1.5, expect: '0px'} // height can't be negative
+]);
+
+test_interpolation({
+  property: 'height',
+  from: 'min-content', /* 50px */
+  to: 'inherit', /* 200px */
+}, [
+  {at: -0.3, expect: '5px'},
+  {at: 0, expect: '50px'},
+  {at: 0.3, expect: '95px'},
+  {at: 0.6, expect: '140px'},
+  {at: 1, expect: '200px'},
+  {at: 1.5, expect: '275px'}
+]);
+
+// both 50px but not interpolable
+test_no_interpolation({
+  property: 'height',
+  from: 'auto',
+  to: 'min-content',
+});
+
+test_interpolation({
+  property: 'height',
+  from: 'fit-content', /* 50px */
+  to: '10px',
+}, [
+  {at: -0.3, expect: '62px'},
+  {at: 0, expect: '50px'},
+  {at: 0.3, expect: '38px'},
+  {at: 0.6, expect: '26px'},
+  {at: 1, expect: '10px'},
+  {at: 1.5, expect: '0px'} // height can't be negative
+]);
+
+// both 50px but not interpolable
+test_no_interpolation({
+  property: 'height',
+  from: 'max-content',
+  to: 'fit-content',
+});
+
+test_no_interpolation({
+  property: 'height',
+  from: 'max-content',
+  to: 'stretch',
+});
+
+test_interpolation({
+  property: 'height',
+  from: 'max-content', /* 50px */
+  to: neutralKeyframe, /* 150px */
+}, [
+  {at: -0.3, expect: '20px'},
+  {at: 0, expect: '50px'},
+  {at: 0.3, expect: '80px'},
+  {at: 0.6, expect: '110px'},
+  {at: 1, expect: '150px'},
+  {at: 1.5, expect: '200px'}
+]);
+
+test_interpolation({
+  property: 'height',
+  from: neutralKeyframe, /* 150px */
+  to: 'fit-content', /* 50px */
+}, [
+  {at: -0.3, expect: '180px'},
+  {at: 0, expect: '150px'},
+  {at: 0.3, expect: '120px'},
+  {at: 0.6, expect: '90px'},
+  {at: 1, expect: '50px'},
+  {at: 1.5, expect: '0px'}
+]);
+
+</script>