[webkit-changes] [WebKit/WebKit] 9cf827: [css-anchor-position-1] Add restrictions on valid ...

[David Choi]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 9cf82786bf79ae7bae6d9e38b2b0f0277f661be1
      https://github.com/WebKit/WebKit/commit/9cf82786bf79ae7bae6d9e38b2b0f0277f661be1
  Author: David Choi <davidchoi1027 at gmail.com>
  Date:   2024-08-13 (Tue, 13 Aug 2024)

  Changed paths:
    M Source/WebCore/style/AnchorPositionEvaluator.cpp
    M Source/WebCore/style/StyleTreeResolver.cpp

  Log Message:
  -----------
  [css-anchor-position-1] Add restrictions on valid anchor and anchor-positioned elements
https://bugs.webkit.org/show_bug.cgi?id=277969
rdar://133705664

Reviewed by Antti Koivisto.

This patch ensures that anchor elements generate a principal box.
It also explicitly prevents in-flow elements and pseudo-elements from
being anchor-positioned. (Pseudo-element support should come later.)

* Source/WebCore/style/AnchorPositionEvaluator.cpp:
(WebCore::Style::AnchorPositionEvaluator::resolveAnchorValue):
* Source/WebCore/style/StyleTreeResolver.cpp:
(WebCore::Style::TreeResolver::updateAnchorPositioningState):

Canonical link: https://commits.webkit.org/282166@main



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