#!/bin/sh
# Press Logo+Alt+$K to turn $K into an inverted key.
# Key down and up events for $K will be swapped.
# Press Logo+Alt+$K again to return $K to a normal key.
# Setup (in sway config);
# dotool needs to be running for the virtual keyboard input to work
# exec dotoold
# usage: call this script from your sway config, with the key as the only argument:
# exec ~/.config/sway/dotool_key_invert w
S="$0"
K="$1"
A="$2"
I="$3"
# necessary due to https://github.com/swaywm/sway/issues/6961 and our use of --input-device
swaymsg seat '*' keyboard_grouping none
setup() {
  # unbind the key
  swaymsg -- unbindsym "$K"
  "$(dirname "$S")/dotool_other_keyboards" "$S" "$K" un
  # release the key to avoid holding it down forever
  echo "keyup $K" | dotoolc
  # bind the combination to `seton`
  swaymsg -- bindsym "Mod1+Mod4+$K" exec "'$S' '$K' on"
}
seton() {
  # bind the key
  "$(dirname "$S")/dotool_other_keyboards" "$S" "$K" bd
  # start holding down the key
  echo "keydown $K" | dotoolc
  # bind the combination to `setup`
  swaymsg -- bindsym "Mod1+Mod4+$K" exec "'$S' '$K' off"
}
case "$A" in
  bd) swaymsg -- bindsym --no-repeat --input-device="$I" "$K" exec "echo 'keyup $K' | dotoolc";
      swaymsg -- bindsym --release   --input-device="$I" "$K" exec "echo 'keydown $K' | dotoolc";;
  un) swaymsg -- unbindsym --no-repeat --input-device="$I" "$K";
      swaymsg -- unbindsym --release --input-device="$I" "$K";;
  on) seton;;
  *) setup;;
esac