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LibWeb: Narrow @keyframes insertRule() invalidation

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Handle inline stylesheet @keyframes insertions without falling back to
broad owner invalidation. Recompute only elements whose computed
animation-name already references the inserted keyframes name.

Document-scoped insertions still walk the shadow-including tree so
existing shadow trees pick up inherited animations, and shadow-root
stylesheets fan out through the host root so :host combinators can
refresh host-side consumers as well. Also introduce the shared
ShadowRootStylesheetEffects analysis so later stylesheet mutation paths
can reuse the same per-scope escape classification.
This commit is contained in:
Andreas Kling
2026-04-22 22:32:20 +02:00
committed by Andreas Kling
parent b6559d3846
commit 4e92765211
Notes: github-actions[bot] 2026-04-23 14:49:46 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/4e927652110
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/9049
15 changed files with 421 additions and 1 deletions
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6
Tests/LibWeb/Text/expected/css/insert-rule-shadow-root-slotted-invalidation.txt Normal file
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@@ -0,0 +1,6 @@
slotted before rule: rgb(0, 0, 0)
slotted after rule: rgb(0, 0, 255)
inherited before slot rule: rgb(0, 0, 0)
inherited after slot rule: rgb(255, 0, 0)
opacity before keyframes: 1
opacity after keyframes: 0.25