Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 79b8df526100e9ab5ae9fa45da73c00f595abdc0
      
https://github.com/WebKit/WebKit/commit/79b8df526100e9ab5ae9fa45da73c00f595abdc0
  Author: Kiet Ho <[email protected]>
  Date:   2025-04-06 (Sun, 06 Apr 2025)

  Changed paths:
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-anchor-position/base-style-invalidation-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-anchor-position/try-tactic-alignment-expected.txt
    M Source/WebCore/style/AnchorPositionEvaluator.cpp
    M Source/WebCore/style/StyleBuilderConverter.h

  Log Message:
  -----------
  [css-anchor-position-1] Implement swapping due to a try-tactic for 
self-alignment properties
rdar://148137397
https://bugs.webkit.org/show_bug.cgi?id=290665

Reviewed by Antti Koivisto.

This commit implements swapping due to a try-tactic [1] for self-alignment
properties (align-self and justify-self)

[1]: https://drafts.csswg.org/css-anchor-position-1/#swap-due-to-a-try-tactic

* 
LayoutTests/imported/w3c/web-platform-tests/css/css-anchor-position/base-style-invalidation-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-anchor-position/try-tactic-alignment-expected.txt:
* Source/WebCore/style/AnchorPositionEvaluator.cpp:
(WebCore::Style::flipStart):
    - Swap values of align-self and justify-self when applying flip-start 
tactic.

* Source/WebCore/style/StyleBuilderConverter.h:
(WebCore::Style::oppositeItemPosition):
    - Add function to flip ItemPosition values.

(WebCore::Style::BuilderConverter::convertSelfOrDefaultAlignmentData):
    - Flip position value when a position-try fallback is specified
      and the current property is align-self or justify-self.

Canonical link: https://commits.webkit.org/293328@main



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