RESOLVED FIXED262696
Align UA Stylesheet by adding default properties of 'semantics' and 'maction' section in mathml.css 
https://bugs.webkit.org/show_bug.cgi?id=262696
Summary Align UA Stylesheet by adding default properties of 'semantics' and 'maction'...
Ahmad Saleem
Reported 2023-10-05 05:33:45 PDT
SSIA. We already have this partially but add two more rules: /* <mrow>-like elements */ semantics > :not(:first-child) { display: none; } maction > :not(:first-child) { display: none; } merror { border: 1px solid red; background-color: lightYellow; } mphantom { visibility: hidden; } ___ We already have last two so it is just re-arranging and adding first two. Thanks!
Attachments
Add attachment proposed patch, testcase, etc.
Ahmad Saleem
Comment 1 2023-10-05 05:35:17 PDT
I will do drive-by fixes and added section comments in this as well to make it easier to do few more follow-up alignments. :-)
Radar WebKit Bug Importer
Comment 2 2023-10-12 05:34:14 PDT
<rdar://problem/116858835>
Ahmad Saleem
Comment 3 2023-12-20 19:28:26 PST
C++ Implementation needs to be removed as well beside this change - https://github.com/WebKit/WebKit/pull/18758
Frédéric Wang (:fredw)
Comment 4 2024-10-10 00:01:16 PDT
(In reply to Ahmad Saleem from comment #3) > C++ Implementation needs to be removed as well beside this change - > https://github.com/WebKit/WebKit/pull/18758 Maybe this bug can thus be retitled, so that it's about aligning semantics/maction's implementation with MathML Core.
Frédéric Wang (:fredw)
Comment 5 2024-10-10 00:08:51 PDT
From MathML Core, I see maction/semantics are grouping elements here: https://w3c.github.io/mathml-core/#dfn-grouping-elements and that they are laid out using the mrow algorithm. So probably we should just use the mrow element/renderer classes and add the corresponding CSS. (We might want to experiment this change under a runtime flag)
Ahmad Saleem
Comment 6 2024-10-10 04:03:44 PDT
(In reply to Frédéric Wang (:fredw) from comment #5) > From MathML Core, I see maction/semantics are grouping elements here: > https://w3c.github.io/mathml-core/#dfn-grouping-elements and that they are > laid out using the mrow algorithm. So probably we should just use the mrow > element/renderer classes and add the corresponding CSS. > > (We might want to experiment this change under a runtime flag) Should I retitle above PR and land it and then when we start implementing, we can add `C++` side behind flag?
Eri
Comment 7 2025-09-19 00:44:36 PDT
Pull request: https://github.com/WebKit/WebKit/pull/50992
Eri
Comment 8 2025-09-26 09:11:22 PDT
Pull request: https://github.com/WebKit/WebKit/pull/51387
EWS
Comment 9 2025-10-02 05:31:39 PDT
Committed 300875@main (d133d2f62153): <https://commits.webkit.org/300875@main> Reviewed commits have been landed. Closing PR #51387 and removing active labels.
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