1779891 - dotless j subscript inherited from <mover>

Status: UNCONFIRMED

(Core :: MathML, defect)

Description

[15063662]

Attachment: 1.html

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Steps to reproduce:

(See attachment)
Set font-family to 'Latin Modern Math'
Put i or j in subscript in the base of <mover> with the attribute [accent="true"]

Actual results:

i or j becomes dotless
But works fine when set font-family to 'Cambria Math'

Expected results:

i or j shouldn't become dotless, because they are in the subscript

Comment 1

[15063662]

Attachment: Screenshot 2022-07-16 at 17-20-19 Screenshot.png

Comment 2

[Frédéric Wang (:fredw)]

I guess this is https://docs.microsoft.com/en-us/typography/opentype/spec/features_ae#dtls but not sure why this effect applies to the subscript.

Comment 3

[15063662]

I guess this is https://searchfox.org/mozilla-central/rev/6d7704caae2a61b0101bdb67481a80af20376663/layout/mathml/nsMathMLmunderoverFrame.cpp#337 where dotless forms propogate to subtree?

Comment 4

[Frédéric Wang (:fredw)]

Yes, this is

https://learn.microsoft.com/en-us/typography/opentype/spec/math#opentype-layout-tags-used-with-the-math-table

but not (yet) specified in MathML Core: https://github.com/w3c/mathml-core/issues/68