Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 197ddc80fe10e4d3bf8d2dcd12809af56d63577a
https://github.com/WebKit/WebKit/commit/197ddc80fe10e4d3bf8d2dcd12809af56d63577a
Author: Antti Koivisto <an...@apple.com>
Date: 2025-08-26 (Tue, 26 Aug 2025)
Changed paths:
M Source/WebCore/style/ChildChangeInvalidation.cpp
M Source/WebCore/style/ClassChangeInvalidation.cpp
M Source/WebCore/style/RuleFeature.cpp
M Source/WebCore/style/RuleFeature.h
M Source/WebCore/style/StyleInvalidator.cpp
Log Message:
-----------
Limit the scope of invalidation traversal for `:has(> .changed) .subject`
https://bugs.webkit.org/show_bug.cgi?id=297893
rdar://159173631
Reviewed by Simon Fraser.
It is sufficient to traverse the subtree of the parent to invalidate in this
case, rather than the entire DOM.
This helps with GitHub performance as it uses selectors of this type.
* Source/WebCore/style/ChildChangeInvalidation.cpp:
(WebCore::Style::ChildChangeInvalidation::invalidateForChangedElement):
* Source/WebCore/style/ClassChangeInvalidation.cpp:
(WebCore::Style::ClassChangeInvalidation::computeInvalidation):
* Source/WebCore/style/RuleFeature.cpp:
(WebCore::Style::isSiblingOrSubject):
(WebCore::Style::isScopeBreaking):
(WebCore::Style::computeHasPseudoClassMatchElement):
(WebCore::Style::computeSubSelectorMatchElement):
Add two new MatchElement types for these cases:
`:has(> .changed) .subject
`:has(> .changed) > .subject
* Source/WebCore/style/RuleFeature.h:
* Source/WebCore/style/StyleInvalidator.cpp:
(WebCore::Style::Invalidator::invalidateStyleWithMatchElement):
Traverse only the required subtrees for the new types.
Also document each invalidation traversal case.
Canonical link: https://commits.webkit.org/299162@main
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