xdg-desktop-portal 1.17.x introduces a new way to select which portals will
be used for which desktop environments, modelled on mimeapps.list:
- each desktop environment should provide a file like
/usr/share/xdg-desktop-portal/wayfire-portals.conf
- the filename is ${DESKTOP}-portals.conf where ${DESKTOP} is the desktop
environment's entry in $XDG_CURRENT_DESKTOP (the same as the DesktopNames
from /usr/share/{x,wayland-}sessions/*.desktop), folded to lower case
- sysadmins and users can override this via files named portals.conf or
${DESKTOP}-portals.conf in various locations like /etc/xdg-desktop-portal
and ~/.config/xdg-desktop-portal
Please see portals.conf(5) or its source code
https://github.com/flatpak/xdg-desktop-portal/blob/main/doc/portals-conf.rst
for full details.
If I'm reading correctly, I think wayfire uses XDG_CURRENT_DESKTOP="Wayfire"?
If that's the case, then it should provide a wayfire-portals.conf so that
individual users aren't required to set this up for themselves.
For example, if the intention is to use x-d-p-wlr for the interfaces
that it supports (screenshots and screencasting), and x-d-p-gtk for
other interfaces (such as File->Open and File->Save As... dialogs),
then the simplest way to write that would be:
[preferred]
default=wlr;gtk;
The desktop environment (either wayfire or some larger metapackage) should
probably also have a Recommends, or at least a Suggests, on whatever
portals would be most appropriate for it. I see that it already Suggests
xdg-desktop-portal-wlr, but not -gtk.
Thanks,
smcv