Automate mouse pointer motion in Wayland on Debian (Not X11/X Window System)

Question

I am trying to find a way to simulate/automate mouse motion using the Wayland protocol on a debian based OS as did using Xlib in X11/X Window System giving the x and y coordinates:

from Xlib.display import Display
from Xlib.ext.xtest import fake_input
from Xlib import X
import os

#Go to x and y coordinates and click with left button (1):
x = 26
y = 665
button = 1

myDisplay = Display(os.environ['DISPLAY'])

fake_input(myDisplay, X.MotionNotify, x=x, y=y)
myDisplay.sync()
fake_input(myDisplay, X.ButtonPress, button)
myDisplay.sync()
fake_input(myDisplay, X.ButtonRelease, button)
myDisplay.sync()

and with pynput:

from pynput.mouse import Button, Controller

mouse = Controller()

mouse.position = (26,665)

mouse.click(Button.left)

I have tried with uinput to reproduce the same idea from the scripts presented above, the code doesn't give error but nothing happens when the script is executed:

sudo modprobe uinput && sudo python3 uinputtest.py

import uinput

# Create new mouse device
device = uinput.Device([
    uinput.BTN_LEFT,
    uinput.BTN_RIGHT,
    uinput.REL_X,
    uinput.REL_Y,
])

# Move the pointer to x = 26 and y = 665
device.emit(uinput.REL_X, 26)
device.emit(uinput.REL_Y, 665)

# Click and release the left mouse button 
device.emit(uinput.BTN_LEFT, 1)
device.emit(uinput.BTN_LEFT, 0)

Is there anything missing on this last script? I am trying to execute it on Wayland with super user permission.

Answer 1

You should wait a bit before emitting any event.

In uinput example code it says:

We are inserting a pause here so that userspace has time to detect, initialize the new device, and can start listening to the event, otherwise it will not notice the event we are about to send. This pause is only needed in our example code!

Putting a time.sleep(1) after the device intialization fixes the problem. Ydotool, which provides a userspace application and daemon for what you are trying to achieve also waits for a second.