On Sat, 7 Jun 2025 at 14:49, Aoife Moloney via devel-announce <devel-annou...@lists.fedoraproject.org> wrote: > > Wiki - https://fedoraproject.org/wiki/Changes/SubstituteSansForMono > Discussion thread - > https://discussion.fedoraproject.org/t/f43-change-proposal-substitute-sans-for-mono-self-contained/155255 > > This is a proposed Change for Fedora Linux. > This document represents a proposed Change. As part of the Changes > process, proposals are publicly announced in order to receive > community feedback. This proposal will only be implemented if approved > by the Fedora Engineering Steering Committee. > > > > == Summary == > Currently monospace fonts are implicitly substituted with sans-serif > fonts by default configuration file in fontconfig if missing. However, > this is unpredictable behavior and it just happened to work. this > behavior might be changed once one install other font packages. > This Change aims to make it predictable and assign a tentative default > monospace font for languages which is missing them.
While the actual change is self contained I am not sure this is a self contained as display of fonts has the possibility to impact users with language, display, printing, accessibility and probably a lot of other things. > == Owner == > > * Name: [[User:Tagoh|Akira TAGOH]] > * Email: tagoh AT redhat DOT com > > > == Detailed Description == > We have the following langugages which don't have a dedicated default > monospace font: > > * Amharic > * Arabic > * Assamese > * Bangla > * Burmese > * Georgian > * Gujarati > * Hebrew > * Hindi > * Kannada > * Khmer > * Malayalam > * Marathi > * Odia > * Persian > * Punjabi > * Sinhala > * Tamil > * Telugu > * Thai > * Urdu > > They are what we currently have a translation for anaconda and that > implies that we might have more. > > The font selection behavior of monospace for those languages might be > changed when other font packages for them is installed. That isn't a > good experience. We have never ever added substitution config for > monospace to such sans-serif font packages because they are NOT a > monospace font. That's true but the actual behavior isn't like it. > fontconfig tries to substitute a font to avoid a missing font > situation. > > So this Change don't change anything in most cases. this just make > sure we have same behavior with default fontsets no matter what extra > font packages is installed. We can drop it once we have a dedicated > monospace font package for them. > > == Feedback == > > == Benefit to Fedora == > This Change provides consistent behavior to users for monospace font > selection. > > > == Scope == > * Proposal owners: > ** Add substitution config for monospace to the following font packages: > *** google-noto-sans-arabic-vf-fonts > *** google-noto-sans-bengali-vf-fonts > *** google-noto-sans-devanagari-vf-fonts > *** google-noto-sans-ethiopic-vf-fonts > *** google-noto-sans-georgian-vf-fonts > *** google-noto-sans-gujarati-vf-fonts > *** google-noto-sans-hebrew-vf-fonts > *** google-noto-sans-kannada-vf-fonts > *** google-noto-sans-khmer-vf-fonts > *** google-noto-sans-oriya-vf-fonts > *** google-noto-sans-sinhala-vf-fonts > *** google-noto-sans-tamil-vf-fonts > *** google-noto-sans-telugu-vf-fonts > *** google-noto-sans-thai-vf-fonts > *** paktype-naskh-basic-fonts > *** rit-meera-new-fonts > *** sil-padauk-fonts > *** vazirmatn-vf-fonts > > * Other developers: N/A > > * Release engineering: N/A > > * Policies and guidelines: N/A (not needed for this Change) > > * Trademark approval: N/A (not needed for this Change) > > * Alignment with the Fedora Strategy: N/A > > > == Upgrade/compatibility impact == > The default monospace font might be changed for those who rely on this > unpredictable behavior. To get this back, they will need to write > their own extra fontconfig configuration file to override the default > monospace font such as: > <pre> > <fontconfig> > <match> > <test name="family"><string>monospace</string></test> > <test name="lang"><string>langcode-such-as-en</string></test> > <edit name="family" mode="prepend" > binding="same"><string>family-name-you-prefer</string></edit> > </match> > </fontconfig> > </pre> > > Or use `fonts-tweak-tool` to change the default monospace font for a > certain language. > > > == How To Test == > To make sure this Change don't affect our default fontsets, we are > tracking the default font changes at > https://fedora-i18n.github.io/font-status/ . the difference will be > visible there if something is changed. > For extra font packages, describing all the patterns here may be > difficult though, you could try installing langpacks-fonts-''ll_cc'' > and then: > <pre> > $ sudo dnf install fontquery > $ fontquery-diff --loose-comparison 43 > </pre> > > Assuming that you are running on Fedora 43 with some extra font > packages that pulled in by langpacks. the above command will show you > difference between default fontsets and your local machine. > > > == User Experience == > This Change don't affect most users who just use default fontsets or > experts who use a custom font with proper substitution config to > change their default monospace font. this may affects an user who use > this unpredictable behavior to change the default monospace font, > particularly without having a substitution config explicitly. > > > == Dependencies == > No > > > > == Contingency Plan == > No contingency plans for this Change because this won't change > anything compared to current expected behavior with minimal defult > fontsets. We simply need to fix something in extra font packages which > affect our default fontsets. > > * Contingency mechanism: (What to do? Who will do it?) N/A (not a > System Wide Change) > * Contingency deadline: N/A (not a System Wide Change) > * Blocks release? N/A (not a System Wide Change) > > > == Documentation == > > N/A (not a System Wide Change) > > == Release Notes == > > > -- > Aoife Moloney > > Fedora Operations Architect > > Fedora Project > > Matrix: @amoloney:fedora.im > > IRC: amoloney > > -- > _______________________________________________ > devel-announce mailing list -- devel-annou...@lists.fedoraproject.org > To unsubscribe send an email to devel-announce-le...@lists.fedoraproject.org > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/devel-annou...@lists.fedoraproject.org > Do not reply to spam, report it: > https://pagure.io/fedora-infrastructure/new_issue -- _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
