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layout: Only prevent fixed table layout when inline-size is auto (#35882)

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We were ignoring `table-layout: fixed` both for `inline-size: auto` and
`inline-size: max-content`. However, the CSSWG resolved that fixed table
layout should be triggered except when `inline-size` is `auto`.
https://github.com/w3c/csswg-drafts/issues/10937#issuecomment-2669150397

Blink has already adopted this change, and they modified the WPT
`/css/css-tables/fixed-layout-2.html` accordingly. Here I'm doing some
further cosmetic cleanups to the test.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Oriol Brufau 2025-03-10 15:09:43 +01:00 • committed by GitHub
parent 79e25a3e77
commit 56da4ad959
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4 changed files with 27 additions and 33 deletions
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14
components/layout_2020/table/layout.rs
View file

@ -240,15 +240,11 @@ impl Zero for CellOrTrackMeasure {
impl<'a> TableLayout<'a> { impl<'a> TableLayout<'a> {
fn new(table: &'a Table) -> TableLayout<'a> { fn new(table: &'a Table) -> TableLayout<'a> {
// It's not clear whether `inline-size: stretch` allows fixed table mode or not, // The CSSWG resolved that only `inline-size: auto` can prevent fixed table mode.
// we align with Gecko and Blink. // <https://github.com/w3c/csswg-drafts/issues/10937#issuecomment-2669150397>
// <https://github.com/w3c/csswg-drafts/issues/10937>. let style = &table.style;
let is_in_fixed_mode = table.style.get_table().clone_table_layout() == let is_in_fixed_mode = style.get_table().table_layout == TableLayoutMode::Fixed &&
TableLayoutMode::Fixed && !style.box_size(style.writing_mode).inline.is_initial();
!matches!(
table.style.box_size(table.style.writing_mode).inline,
Size::Initial | Size::MaxContent
);
Self { Self {
table, table,
pbm: PaddingBorderMargin::zero(), pbm: PaddingBorderMargin::zero(),

2
tests/wpt/meta/MANIFEST.json vendored
View file

@ -596238,7 +596238,7 @@
] ]
], ],
"fixed-layout-2.html": [ "fixed-layout-2.html": [
"8b805af7669ed914dc5f0d007a2ff8171f45d60a", "d751954714cd7b8c1f5b87182d1025474c5c4939",
[ [
null, null,
{} {}

3
tests/wpt/meta/css/css-tables/fixed-layout-2.html.ini vendored
View file

@ -1,3 +0,0 @@
[fixed-layout-2.html]
[max-content]
expected: FAIL

41
tests/wpt/tests/css/css-tables/fixed-layout-2.html vendored
View file

@ -3,6 +3,7 @@
<link rel="author" title="Oriol Brufau" href="obrufau@igalia.com"> <link rel="author" title="Oriol Brufau" href="obrufau@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-tables-3/#in-fixed-mode"> <link rel="help" href="https://drafts.csswg.org/css-tables-3/#in-fixed-mode">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/10937"> <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/10937">
<meta name="assert" content="Fixed table layout is triggered except when inline-size is auto.">
<link rel="stylesheet" href="./support/base.css"> <link rel="stylesheet" href="./support/base.css">
<style> <style>
@ -52,26 +53,25 @@ x-td > div {
<script src="/resources/testharness.js"></script> <script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script> <script src="/resources/testharnessreport.js"></script>
<script> <script>
let sizeData = { let sizes = [
"10px": true, "10px",
"100%": true, "100%",
"calc(10px + 100%)": true, "calc(10px + 100%)",
"auto": false, "auto",
"min-content": true, "min-content",
"max-content": true, "max-content",
"fit-content": true, "fit-content",
"calc-size(any, 10px + 100%)": true, "calc-size(any, 10px + 100%)",
"fit-content(0)",
"stretch",
"contain",
// These expectations are tentative, see https://github.com/w3c/csswg-drafts/issues/10937 // These are non-standard sizes.
"fit-content(0)": true, "-moz-available",
"stretch": true, "-webkit-fill-available",
"intrinsic",
// These are non-standard, expect the most popular behavior among the supporting implementations. "min-intrinsic",
"-moz-available": true, ];
"-webkit-fill-available": true,
"intrinsic": true,
"min-intrinsic": true,
};
function checkSize(size, allowsFixed) { function checkSize(size, allowsFixed) {
let fragment = template.content.cloneNode(true); let fragment = template.content.cloneNode(true);
@ -101,8 +101,9 @@ function checkSize(size, allowsFixed) {
}, size); }, size);
} }
for (let [size, allowsFixed] of Object.entries(sizeData)) { for (let size of sizes) {
if (CSS.supports("width", size)) { if (CSS.supports("width", size)) {
let allowsFixed = size !== "auto";
checkSize(size, allowsFixed); checkSize(size, allowsFixed);
// calc-size() should trigger fixed table layout. // calc-size() should trigger fixed table layout.