[Webkit-unassigned] [Bug 281232] <mspace width="1ch"> doens't work

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Oct 10 10:25:30 PDT 2024


https://bugs.webkit.org/show_bug.cgi?id=281232

Frédéric Wang (:fredw) <fred.wang at free.fr> changed:

           What    |Removed                     |Added
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           See Also|                            |https://bugzilla.mozilla.or
                   |                            |g/show_bug.cgi?id=1574751

--- Comment #3 from Frédéric Wang (:fredw) <fred.wang at free.fr> ---
Thanks the issue is probably that Firefox and WebKit initially relied on the MathML definition of lengths from MathML3 which does not accept ch. They haven't completely migrated to MathML Core's definition, which is just CSS's <length-percentage>:

https://developer.mozilla.org/en-US/docs/Web/MathML/Values#legacy_mathml_lengths

Regarding tests,

web-platform-tests/mathml/relations/css-styling/lengths-1.html
web-platform-tests/mathml/relations/css-styling/lengths-2.html

don't seem to cover this case.

Ideally, we should just switch to the CSS parser for MathML lengths, but meanwhile we could just tweak MathMLElement::LengthType to handle this unit.

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