swaywm: displays an [I] indicator in idle-inhibiting windows

idleinhibit-visualizer.sh

#!/bin/bash

current=""

while true; do
  new="$(swaymsg -t get_tree | jq -c 'recurse(.nodes[]) | del(.nodes) | select(.type == "con") | select(.inhibit_idle) | .id')"

  for id in $new; do
    re="\\b$id\\b"
    if ! [[ "$current" =~ $re ]]; then
      swaymsg "[con_id=$id] title_format \"[I] %title\""
    fi
  done

  for id in $current; do
    re="\\b$id\\b"
    if ! [[ "$new" =~ $re ]]; then
      swaymsg "[con_id=$id] title_format \"%title\""
    fi
  done

  current="$new"
  sleep 1
done