toggle_parser.sh

#!/bin/bash
# Copyright (c) 2024 Tomas Mark (tomas@digitalspace.name)

# Important for Proper Functionality
# It is required that the alternate key matches the target alternate key shortcut in Bitwig Studio.
# This means that if you assign Alt + any mouse button, you also need to define the corresponding Alt + key shortcut in Bitwig Studio, and so on.

if [ -z "$1" ]; then
    # notify-send "toogle_parser usage: $0 <mbutton>"
    exit 1
fi

MBUTTON=$1

SUPER_PRESSED=false
SHIFT_PRESSED=false
CONTROL_PRESSED=false
ALT_PRESSED=false

# varianta 1 - improved performance
keyboard_states=$(xinput list | grep -i 'keyboard' | grep -o 'id=[0-9]*' | grep -o '[0-9]*' | xargs -I{} xinput query-state {})
if echo "$keyboard_states" | grep -q 'key\[133\]=down'; then
    #notify-send "Super pressed"
    SUPER_PRESSED=true
fi
if echo "$keyboard_states" | grep -q 'key\[50\]=down\|key\[62\]=down'; then
    #notify-send "Shift pressed"
    SHIFT_PRESSED=true
fi
if echo "$keyboard_states" | grep -q 'key\[37\]=down'; then
    #notify-send "Control pressed"
    CONTROL_PRESSED=true
fi
if echo "$keyboard_states" | grep -q 'key\[64\]=down'; then
    #notify-send "Alt pressed"
    ALT_PRESSED=true
fi

# varianta 2 - more robust for debugging
# keyboard_ids=$(xinput list | grep -i 'keyboard' | grep -o 'id=[0-9]*' | grep -o '[0-9]*')
# for keyboard_id in $keyboard_ids; do
#     # echo "Getting keyboard state with ID: $keyboard_id"
#     keyboard_state=$(xinput query-state "$keyboard_id")

#     # shift down
#     if echo "$keyboard_state" | grep -q 'key\[50\]=down\|key\[62\]=down'; then
#         SHIFT_PRESSED=true
#     fi
#     # left control down
#     if echo "$keyboard_state" | grep -q 'key\[37\]=down'; then
#         CONTROL_PRESSED=true
#     fi
#     # left alt down
#     if echo "$keyboard_state" | grep -q 'key\[64\]=down'; then
#         ALT_PRESSED=true
#     fi
# done

# left shift down event
#if xinput query-state "$keyboard_id" | grep -q 'key\[50\]=down\|key\[62\]=down'; then
if [ "$SHIFT_PRESSED" = true ]; then
    if [ "$MBUTTON" == "b4" ]; then
        ./key_sender.sh shift+s
    fi
    if [ "$MBUTTON" == "b5" ]; then
        ./key_sender.sh shift+s
    fi
fi

# control down
#if xinput query-state "$keyboard_id" | grep -q 'key\[37\]=down'; then
if [ "$CONTROL_PRESSED" = true ]; then
    if [ "$MBUTTON" == "b4" ]; then
        ./key_sender.sh control+u
    fi
    if [ "$MBUTTON" == "b5" ]; then
        ./key_sender.sh control+u
    fi
fi

# alt down
#if xinput query-state "$keyboard_id" | grep -q 'key\[64\]=down'; then
if [ "$ALT_PRESSED" = true ]; then
    if [ "$MBUTTON" == "b4" ]; then
        ./key_sender.sh alt+w
    fi
    if [ "$MBUTTON" == "b5" ]; then
        ./key_sender.sh alt+w
    fi
fi

# solo mouse b4 or b5 
if [ "$SHIFT_PRESSED" = false -a "$CONTROL_PRESSED" = false -a "$ALT_PRESSED" = false ]; then
    if ! xdotool getwindowfocus getwindowname | grep -q 'Alt_L' && ! xdotool getwindowfocus getwindowname | grep -q 'Shift_L'; then
        if [ "$MBUTTON" == "b4" ]; then
            ./key_sender.sh alt+p
        fi
        if [ "$MBUTTON" == "b5" ]; then
            ./key_sender.sh space
        fi
    fi
fi