Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b31aa95e64e1bff3b3dd2d9284579623dfbfbf46
https://github.com/WebKit/WebKit/commit/b31aa95e64e1bff3b3dd2d9284579623dfbfbf46
Author: Kiet Ho <[email protected]>
Date: 2025-03-21 (Fri, 21 Mar 2025)
Changed paths:
M
LayoutTests/imported/w3c/web-platform-tests/css/css-anchor-position/anchor-scope-basic-expected.txt
M Source/WebCore/style/AnchorPositionEvaluator.cpp
Log Message:
-----------
[css-anchor-position-1] Anchor element can establish an anchor scope
containing itself
rdar://146986819
https://bugs.webkit.org/show_bug.cgi?id=289737
Reviewed by Antti Koivisto.
An anchor element can establish an anchor scope containing itself.
Given this document:
<div id="anchor" style="anchor-name: --foo; anchor-scope: --foo">
<div id="anchor-positioned" style="position-anchor: --foo"></div>
</div>
Element #anchor is an anchor named --foo, and also establishes an anchor
scope for its descendants. Therefore #anchor-positioned can access --foo,
which is #anchor. However our current algorithm does not consider #anchor
to be the element establishing an anchor scope for #anchor, because we
only consider ancestors of #anchor.
This patch fixes the anchor scope resolution process by also considering
the anchor itself as the anchor scope before going up the ancestor chain.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-anchor-position/anchor-scope-basic-expected.txt:
* Source/WebCore/style/AnchorPositionEvaluator.cpp:
(WebCore::Style::anchorScopeForAnchorElement):
Canonical link: https://commits.webkit.org/292523@main
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