Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 9de807e954f2c20d01c231a32bbcdf6d4707d82f
https://github.com/WebKit/WebKit/commit/9de807e954f2c20d01c231a32bbcdf6d4707d82f
Author: Simon Fraser <[email protected]>
Date: 2026-02-13 (Fri, 13 Feb 2026)
Changed paths:
M Source/WebCore/rendering/RenderElement.cpp
M Source/WebCore/rendering/style/RenderStyle.cpp
Log Message:
-----------
[Scroll anchoring] Optimize scrollAnchoringSuppressionStyleDidChange()
https://bugs.webkit.org/show_bug.cgi?id=307729
rdar://170277397
Reviewed by Alan Baradlay.
`scrollAnchoringSuppressionStyleDidChange()` shows up in some MotionMark tests.
Fix an erroneous `&&` to instead test pointer inequality, as we do everywhere
else,
since his pointer is usually the same.
Check for `diff >= Style::DifferenceResult::Layout` because, by definition,
things
that invalidate scroll anchoring affect layout.
Optimize the testing for the various transform properties; `transform` is
stored in
`miscData`, and the others are stored in `rareData`. Also just test for
`transform`,
`translate`, `scale`, and `rotate`. The spec only mentions the first [1] but it
makes
sense to test the others as well. I purposefully removed testing for offset path
and perspective.
[1] https://drafts.csswg.org/css-scroll-anchoring/#suppression-trigger
[2] https://github.com/w3c/csswg-drafts/issues/13489
* Source/WebCore/rendering/RenderElement.cpp:
(WebCore::RenderElement::styleDidChange):
* Source/WebCore/rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::scrollAnchoringSuppressionStyleDidChange const):
Canonical link: https://commits.webkit.org/307474@main
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