niri_fuzzel_switcher.sh

#!/bin/bash
# adaptation of https://github.com/armerpunkt/niri-fuzzel-switcher

window_ids=()
window_titles=()

while read i; do
  declare -a line_array="($i)"
  window_ids+=(${line_array[0]})
  window_titles+=("${line_array[1]} - ${line_array[2]} \0icon\x1f${line_array[1]}")
done <<<$(niri msg --json windows | jq -r 'sort_by(.layout.pos_in_scrolling_layout[0]) | .[] | [ .id, .app_id, .title] | "\""+join ("\" \"")+"\""')

sel=$(niri msg --json windows | jq "[ sort_by(.layout.pos_in_scrolling_layout[0]).[].is_focused ] | index(true)")
result=$(printf "%b\n" "${window_titles[@]}" | fuzzel --counter --dmenu --index --select-index $sel)

if [ "x$result" != "x" ] && [ $result != -1 ]; then
  niri msg action focus-window --id ${window_ids[result]}
fi