We'll be using hardware encoding for screencasts soon, so we'll likely see
more things go wrong in the future, including crashes of the whole
screencastService. To deal with this, we'll introduce logic to blocklist
certain recording pipelines in case of failure and also add some logic
to retry the recording automatically.
To allow for better messaging to the user in those failure cases, we want
to be aware in gnome-shell, what exactly the error in the recorder was.
So propagate the most common types of errors that can happen in the
ScreencastService to gnome-shell using the new DBusError module.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2976>
Generating the enums from a list of names means that developers
have to deduce the names of enum members themselves. That's more
important than a bit more convenience when adding a new enum, so
instead spell out the exported enums, and use the enums directly
when registering a domain.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3160>
We sometimes return custom D-Bus errors. Right now those errors
are ad-hoc, which means receivers don't have a proper way of
checking whether a thrown GLib.Error corresponds to a particular
remote error.
In order to change that, we should define proper error enums and
domains, and register them with GDBus, so that there is an automatic
mapping between D-Bus errors and GLib.Errors.
The new module doesn't export any domains or enums yet, but provides
internal tooling to make these exports more convenient.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3159>
