A script to move my terminal window to/from my tablet when I leave/reenter the workspace, tmux + sway/i3

window-juggler.py

#!/usr/bin/env nix-shell
#!nix-shell -i python -p "python3.withPackages(ps: with ps; [ i3ipc ])"

# A script I've thrown together
# to use my tablet as a somewhat usable extra screen.

# The core idea is to ssh (mosh) to my work laptop,
# attach to a tmux session creating a new group (`tmux new-session -t tablet`)
# and then create a tmux binding to exchange windows between tablet and laptop
# (`bind Tab swap-window -t tablet`).
# But the best part is automatically moving the active tmux window
# to the tablet when I change workspaces so that I keep seeing it
# and swapping it back when I change back.

import i3ipc

import os


TERMINAL_WORKSPACE_NUM = 3


ipc = i3ipc.Connection()
prev_workspace = ipc.get_tree().find_focused().workspace().num


def on_workspace_focus(ipc, event):
    global prev_workspace
    new_workspace = event.current.num
    if TERMINAL_WORKSPACE_NUM in (prev_workspace, new_workspace):
        os.system('tmux swap-window -t tablet &')
    prev_workspace = new_workspace


ipc.on("workspace::focus", on_workspace_focus)
ipc.main()