Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 71619b4d210d1297dc8b7e674c5fa7520c5ddb60
https://github.com/WebKit/WebKit/commit/71619b4d210d1297dc8b7e674c5fa7520c5ddb60
Author: Simon Fraser <[email protected]>
Date: 2026-04-14 (Tue, 14 Apr 2026)
Changed paths:
A
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/suppress-for-transform-change-expected.txt
A
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/suppress-for-transform-change.html
M Source/WebCore/rendering/RenderElement.cpp
Log Message:
-----------
[Scroll anchoring] Transform changes fail to suppress anchoring sometimes
https://bugs.webkit.org/show_bug.cgi?id=312277
rdar://174503821
Reviewed by Alan Baradlay.
A transform change results in a `Style::DifferenceResult::Overflow` or
`RecompositeLayer`,
so we need to all `scrollAnchoringSuppressionStyleDidChange()` for this diff
type.
The test needs to change both height of a sibling, and transform on the wrapper,
because the transform change alone never results in anchoring adjustments; this
is
because the before-layout transform already has the new state, since RenderLayer
updates its transform on style change. But this isn't a problem, since transform
changes suppress anchoring anyway.
Test:
imported/w3c/web-platform-tests/css/css-scroll-anchoring/suppress-for-transform-change.html
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/suppress-for-transform-change-expected.txt:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-scroll-anchoring/suppress-for-transform-change.html:
Added.
* Source/WebCore/rendering/RenderElement.cpp:
(WebCore::RenderElement::styleDidChange):
Canonical link: https://commits.webkit.org/311253@main
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