Requests for new keys on the Settings portal

[orowith2os]

The Settings portal is a fair bit limited, between most keys being under the org.gnome namespace, or being nonexistent entirely. This issue is meant to keep track of requests for new standardized keys from Linux desktops (like GNOME/GTK and KDE/QT).

Keys that might be useful right now are:

• double-click interval
• cursor-blink
• scrollbar-warp (see https://docs.gtk.org/gtk4/property.Settings.gtk-primary-button-warps-slider.html for reference)

Keys we should have:

• font settings (family, scale factor, hinting, AA settings, etc., no PR available as of right now)
• cursor-theme and cursor-theme-size: settings: Add cursor-theme and cursor-theme-size #1539
• date and time formats: Settings portal: Date and Time formats #1530

Current efforts for new keys:

• reduce-animation, status-shapes, and always-show-scrollbars keys: settings: Add animation-scale, status-shapes, and always-show-scrollbars keys #1590
• button-placement: Button placement key  #996
• color deficiency hints: Draft: Colour filter hint in Settings Portal #1177 (comment)

[nicolasfella]

I've opened https://bugreports.qt.io/browse/QTBUG-133044 to gather input from the Qt side

[orowith2os]

I appreciate the participation from QT, thanks :)

[RushingAlien]

Keys for font settings would be good for accessibility, especially font size and scale-factor. X11 apps has xsettings to listen to for these settings, on wayland there's no such standard, even tho the settings portal documentation for the Settings Portal states

This interface provides read-only access to a small number of standardized host settings required for toolkits similar to XSettings. It is not for general purpose settings.

This is apparent when you use a font scale-factor (can be set in GNOME's accessibility settings as "Large Text"), it'll work on every app when on X11, but on Wayland—with the app/toolkit's wayland backend—some apps do not respect the setting because the lack of font setting keys. Affects:

• Blender
• Qt
• Chromium/Electron
• Wine

For each app/toolkit on this list, the case is on their x11 backend font settings are followed, both in xorg and xwayland. But on Wayland, it (font settings) is not followed.

Other font setting are important too, such as hinting, subpixel AA, subpixel ordering, font choice—for document, monospace, interface and title—and more. It's apparent when you set no font AA in GNOME and just see non-GTK and non-Firefox apps just still having AA (Wayland).

Please edit "font and text settings" into your useful key list.

[orowith2os]

I've added font settings to my list, and did some reordering. A good place to start for these is to look at how toolkits make use of the fonts, ask what they expect from a font setting, and propose a key (or several) for them.

[RushingAlien]

GTK font settings as found in gsettings/dconf and the org.gnome.desktop.interface settings portal interface:

• "document-font-name"
• "font-antialiasing"
• "monospace-font-name"
• "font-rendering"
• "text-scaling-factor"
• "font-rgba-order"
• "font-hinting"
• "font-name"

Font setting keys under x11's xsettings:

• xft-antialias
• xft-dpi—this equates to GTK's "text-scaling-factor" with default of 96(1x), 120 would be 1.25x scale)
• xft-hinting
• xft-hintstyle
• xft-rgba