Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 82fec767aefbfd9b5a433911f00d27444687b3ae
https://github.com/WebKit/WebKit/commit/82fec767aefbfd9b5a433911f00d27444687b3ae
Author: Sammy Gill <[email protected]>
Date: 2026-10-01 (Thu, 01 Oct 2026)
Changed paths:
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LayoutTests/imported/w3c/web-platform-tests/css/css-grid/layout-algorithm/grid-fit-content-indefinite-percentage-not-stretched-001-expected.html
A
LayoutTests/imported/w3c/web-platform-tests/css/css-grid/layout-algorithm/grid-fit-content-indefinite-percentage-not-stretched-001.html
A
LayoutTests/imported/w3c/web-platform-tests/css/css-grid/layout-algorithm/grid-fit-content-indefinite-percentage-not-stretched-002-expected.html
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LayoutTests/imported/w3c/web-platform-tests/css/css-grid/layout-algorithm/grid-fit-content-indefinite-percentage-not-stretched-002.html
M Source/WebCore/layout/formattingContexts/grid/GridLayoutUtils.cpp
Log Message:
-----------
[GFC] fit-content() tracks with an indefinite percentage should not be
stretched
https://bugs.webkit.org/show_bug.cgi?id=325837
rdar://problem/188848301
Reviewed by Alan Baradlay.
When the grid container's size in an axis is indefinite, percentages in
track sizes are treated as auto. trackSizeWithPercentagesConvertedToAuto
applied this to fit-content(<percentage>) by replacing the whole track
size with auto, which is minmax(auto, auto). This makes the track
eligible for the "Stretch auto tracks," portion of the track sizing
algorithm. As a result, a fit-content(50%) row in a grid with
an auto height and a definite min-height was stretched to fill the
min-height.
fit-content() is defined as the smaller of minmax(auto, max-content) and
minmax(auto, limit), so with its limit treated as auto it reduces to
minmax(auto, max-content). Convert it to that instead, which keeps the
track from being stretched and matches the legacy grid implementation.
Canonical link: https://commits.webkit.org/322421@main
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