scripts/waybar/waybar-keyboard.sh

#!/bin/bash

# Input name from `swaymsg -t get_inputs`
INPUTNAME="AT Translated Set 2 keyboard"

ACTIVELAYOUT=$(swaymsg -t get_inputs | jq -r ".[] | select(.name==\"$INPUTNAME\") | .xkb_active_layout_name")

mapfile -t AVAILABLELAYOUTS < <( swaymsg -t get_inputs | jq -r ".[] | select(.name==\"$INPUTNAME\") | .xkb_layout_names" | sed 's/[][,]//g' | sed 's/^ *//g' | grep -P '.')
ACTIVEINDEX=0
for i in "${AVAILABLELAYOUTS[@]}"; do
    if [[ "$i" == '"'$ACTIVELAYOUT'"' ]]; then
        break
    else
        ((ACTIVEINDEX+=1))
    fi
done

ACTION=bar
if [ -n $1 ]; then
    ACTION=$1
fi

if [[ $ACTION == 'osk' ]]; then
    FILE=/home/jpm/.local/state/onscreen-keyboard
    if [ -f $FILE ]; then
        rm $FILE
        busctl call --user sm.puri.OSK0 /sm/puri/OSK0 sm.puri.OSK0 SetVisible b false
    else
        touch $FILE
        busctl call --user sm.puri.OSK0 /sm/puri/OSK0 sm.puri.OSK0 SetVisible b true
    fi
elif [[ $ACTION == 'layout' ]]; then
    # Simpler just to use 'next' to rotate input layouts
    #((ACTIVEINDEX+=1))
    #if [[ $ACTIVEINDEX -eq ${#AVAILABLELAYOUTS[@]} ]]; then
        #ACTIVEINDEX=0
    #fi
    #swaymsg input type:keyboard $ACTIVEINDEX
    swaymsg input type:keyboard xkb_switch_layout next
    $0 bar
else
    SHORT=$(echo $ACTIVELAYOUT | sed -r 's/.*\(([[:alpha:]]*)\).*/\1/')
    if [[ $ACTIVEINDEX -ne 0 ]]; then
        echo '{"text": "⌨  '$SHORT'", "tooltip": "Rotate keyboard layout", "class": "alternate"}'
    else
        echo '{"text": "⌨  '$SHORT'", "tooltip": "Rotate keyboard layout", "class": "primary"}'
    fi
fi