libei used to have direct portal support code (see the git history) but:
- that code was a custom proposed portal that never went anywhere
- libei has slowly changed to be more an input event transport layer since
it is now also used sending events *to* a libei context
- a number of libei users will never need the DBus code, either because they
don't want it or because they talk Dbus themselves na ddon't need this
abstraction.
Luckily, it's quite easy to move this into a separate library with a
simple API that does, effectively, the same trick as the old portal backend.
This API is aiming to be as simple as possible because the tools that
require anything more complex should talk to DBus directly.
An example tool that uses the API to retrieve an EIS fd over the
RemoteDesktop portal is included in this patch.
"Öffis" is a German word meaning public transport. It also sounds like the
French Œuf, the word for egg.
Co-authored-by: Olivier Fourdan <ofourdan@redhat.com>
The original idea here was that we would have an EmulatedInput portal
that allows the application to connect directly to the EIS
implementation to exchange input events - instead of ping-ponging DBus
events through the xdg-desktop-portal as the RemoteDesktop portal
requires.
This is no longer accurate, there are suggested PRs open to add
RemoteDesktop.ConnectToEIS to achieve the same through the existing
RemoteDesktop interface [1] and to add a new InputCapture portal
to allow for events to be sent to a libei receiver context [2].
The example EmulatedInput portal is thus superfluous and can be removed
from here.
We could switch the ei_setup_backend_portal() code to use RemoteDesktop
or InputCapture, depending on the context type, the utility of this is
questionable. Interaction with portals is complex, one needs to
implement the Session/Request interfaces correctly and in the case of
InputCapture also handle the complex zones/pointer barrier setup.
libportal does some of this (or it will, anyway) so it's more useful for
an application to use libportal and then just pass the received fd to
libei.
If there is a future need for this to be handled as part of libei, we
can (re)implement this, but for now it's best to just purge all of this.
[1] https://github.com/flatpak/xdg-desktop-portal/pull/762
[2] https://github.com/flatpak/xdg-desktop-portal/pull/714
Having an output of '.' means the $builddir/doc directory was removed on ninja
clean, only for ninja to then fail because doc/libei.h wasn't there. Let's use
the reference from meson test cases itself.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Build the doxygen API documentation. This is copied from libinput so it takes
over that style (which is more readable than the default doxygen style).
Some extra documentation is added too and all the immediate errors are fixed
in this commit but doxygen still warns about undocumented parameters.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
