NEW 276414
Handling of negative margins in MathML 
https://bugs.webkit.org/show_bug.cgi?id=276414
Summary Handling of negative margins in MathML
Frédéric Wang (:fredw)
Reported 2024-07-10 02:26:48 PDT
It seems margin has been supported for mrow-like elements for a while and I've been doing that for other MathML elements in bug 276169's dependencies. MathML elements calculate their sizes from the coordinates/sizes of their children's margin boxes, which can lead to weird cases with negative margins. We should make sure these edge cases don't cause any wrong behavior laying MathML elements, probably clamping negative offsets to 0 when necessary.
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Frédéric Wang (:fredw)
Comment 1 2024-07-10 08:05:51 PDT
There are WPT crash tests for what I'm mentioning: http://wpt.live/mathml/crashtests/children-with-negative-inline-sizes.html http://wpt.live/mathml/crashtests/children-with-negative-block-sizes.html and they don't seem to cause any crash/asserts, so maybe some explicit clamping is not necessary.
Radar WebKit Bug Importer
Comment 2 2024-07-17 02:27:15 PDT
<rdar://problem/131909042>
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