[Libreoffice-bugs] [Bug 127423] Font feature dialog: Reimplement some checkboxes as tri-state

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=127423

V Stuart Foote <vstuart.foote at utsa.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #11 from V Stuart Foote <vstuart.foote at utsa.edu> ---
Hmm, noticed with the Libertinus fonts that some of the font features (Standard
Ligatures, Contextual Alternates) are enabled by default and can only be
suppressed if I annotate the Font list box with a block.  To disable the OTF
feature I have to enter a negative, e.g. "Libertinus Serif:-liga&-calt".

But if I then use the Characters... --> Features... dialog, setting additional
features active will clobber the negatives. They revert to font defaults.

I don't know the means by which the font signals its default features, assume
HarfBuzz.

But if not a tri-mode in the dialog, we do need those defaults shown the font
'Features' dialog--i.e. checked active, and ability to disable via the dialog
(with indication in the Font list box).

Could be a simple tweak to Tomaž's work on bug 58941 [1][2]

=-ref-=
[1] https://gerrit.libreoffice.org/c/core/+/55892/
[2] https://gerrit.libreoffice.org/c/core/+/55894/

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