Allow compatibility with Wayland-based systems

[Jmgr]

Wayland is slowly becoming the new thing in Linux-based OSes (and BSD too I would guess). Actiona is currently not compatible with it because it uses a lot of X11 functions, including XTest to simulate user input.

Here are a list of features used by Actiona and how they may be implemented in Wayland-based systems:

• Mouse/Keyboard input simulation
  • Freedesktop's RemoteDesktop allows you to move the cursor and press keys, but it's not really made for automation and has limited features.
  • Wayland's protocol: https://github.com/swaywm/wlr-protocols/blob/master/unstable/wlr-virtual-pointer-unstable-v1.xml Looks promising, but is unstable for now. Will experiment with it though.
  • uinput is probably the solution here, but that requires access to /dev/uinput. We will probably have to create a daemon to simulate input, and Actiona would communicate with it using D-Bus or a Unix socket. Not exactly piece of cake. See https://github.com/ReimuNotMoe/ydotool as an example.
• Mouse/Keyboard input recording
  • libevdev could be a solution, using the same daemon as above.
• Taking screenshots
  • the D-Bus interface org.gnome.Shell.Screenshot allows that, will have to look how to do the same on non-Gnome OSes.
• Window listing/manipulation
  • there seem to be some D-Bus interfaces to list windows on Gnome at least (called introspection).
  • I'm not sure how many window manipulation features via D-Bus are stable and widespread across distributions.
• Hotkeys (global shortcuts)
  • maybe a Wayland protocol, like above?

Depends on #143.

[IntinteDAO]

Maybe check "grim" to screenshots for wlroots (wlr-screencopy-unstable-v1)