1548529 - Remove values "thin", "thick", "medium" values of mfrac@linethickness

Status: RESOLVED FIXED

(Core :: MathML, defect)

Description

[Frédéric Wang Nélar]

The MathML refresh CG decided to remove these values from MathML Core: https://github.com/mathml-refresh/mathml/issues/4#issuecomment-472788833

Comment 1

[Frédéric Wang Nélar]

Attachment: Bug 1548529 - Remove values "thin", "thick", "medium" values of mfrac@linethickness. r=emilio

See https://github.com/mathml-refresh/mathml/issues/4

This commit introduces a new preference option
mathml.mfrac_linethickness_names.disabled to disable linethickness names. For
now, these names are only disabled in Nightly builds. Announcements and actual
disabling of this and other MathML features will be considered later.

• test_bug553917.html is updated to check that these values now cause an error
  message to be logged into the console.
• mstyle-1.xhtml is updated to use a numeric linethickness since the point of
  the test is just to check that the attribute is not supported on mstyle, not
  about the actual attribute value.
• Other fractions tests relying on linethickness names are executed with the
  proper preference adjustment.
• mathml/presentation-markup/fractions/frac-linethickness-001.html is now
  closer to its expectation ; however the test still fails because nonzero
  unitless values are not removed yet. See
  https://github.com/mathml-refresh/mathml/issues/24

Comment 2

[Frédéric Wang Nélar]

https://groups.google.com/forum/#!topic/mozilla.dev.platform/G91-vBeC3Rw

Comment 3

[Frédéric Wang Nélar]

Intent to deprecate: https://groups.google.com/forum/#!topic/mozilla.dev.platform/G91-vBeC3Rw

Comment 4

[Frédéric Wang Nélar]

https://treeherder.mozilla.org/#/jobs?repo=try&revision=df9594500afa58bff9fbf60896cedd6f0971e599

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/0692436a2b33
Remove values "thin", "thick", "medium" values of mfrac@linethickness. r=emilio

Comment 6

[Narcis Beleuzu [:NarcisB]]

https://hg.mozilla.org/mozilla-central/rev/0692436a2b33

Comment 7

[Frédéric Wang Nélar]

Polyfill:

https://github.com/mathml-refresh/mathml/issues/4#issuecomment-522293436

Comment 8

[Kohei Yoshino [:kohei]]

Posted site compatibility note: https://www.fxsitecompat.dev/en-CA/docs/2019/various-legacy-mathml-features-have-been-deprecated-or-removed/

Comment 9

[Florian Scholz (Open Web Docs)]

Updated https://wiki.developer.mozilla.org/en-US/docs/Web/MathML/Element/mfrac#Attributes to mention deprecation.
Please add 'dev-doc-needed' to the bug that removes this in a stable Firefox version.