Commits on Apr 25, 2022

1. [@scope] Evaluate scoped rules in SelectorChecker …

   This CL propagates the enclosing StyleScope (if any) to
   SelectorChecker, such that we can perform an additional check
   (CheckInStyleScope) to see if the subject element is in scope.
   
   Several different approaches were considered, but in order to remain
   agile with regards to the different paths the css-cascade-6
   specification might take from this point, I opted to handle it
   entirely within SelectorChecker, even if other approaches may be
   more efficient. It is more important that the prototype is able to
   handle alternative entry points to the feature (if needed) than it
   is to have the best possible performance right away.
   
   Many performance optimizations are planned as follow-ups, most
   notably:
   
    - Making use of the fast reject filter.
    - Multiple StyleScopeFrames with longer lifetimes.
   
   Note also that addressing the following is deferred to future CLs:
   
    - ShadowDOM
    - Invalidation
   
   Bug: 1280240
   Change-Id: I050e7d8249688ae6d6d67431dceca5eabfbcc7fc
   Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3582131
   Reviewed-by: Rune Lillesveen <futhark@chromium.org>
   Commit-Queue: Anders Hartvoll Ruud <andruud@chromium.org>
   Cr-Commit-Position: refs/heads/main@{#995669}

   

   andruud authored and chromium-wpt-export-bot committed Apr 25, 2022
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