Apply application-specific profiles with xsetwacom on Linux

wacom_app_config.sh

#!/bin/bash

# wacom_app_config.sh
#
# BASH script to automatically run change Wacom driver config
# based on the focused application.
#
# Limited support for use under GNOME and its forks due to the
# way it does its own device/took configuration, but should work
# fine elsewhere. It may be possible to use the power of dconf
# to list/read/write keys under '/org/gnome/desktop/peripherals'
# to get a bit more GNOME compatibility.
#

# The sky's the limit
function apply_config {
  CONFIG=$1
  
  reset_config
  case "$CONFIG" in
    blender)
      # Insert any command to run when switching to blender here...
      ;;
    gimp)
      # Insert any command to run when switching to gimp here...
      # Touchring zoom for "all" pads
      wac_config *PAD "AbsWheelDown key +SHIFT +"
      wac_config *PAD "AbsWheelUp key -"
      ;;
    krita)
      # Insert any command to run when switching to krita here...
      # Touchring zoom for "all" pads
      wac_config *PAD "AbsWheelDown key +CTRL +SHIFT +"
      wac_config *PAD "AbsWheelUp key +CTRL -"
      ;;
    default)
      # Insert any command to run when switching to any unrecognized app here...
      # Pan through documents and webpages with lower side-switch with "all" styli
      wac_config *STYLUS "button 2 pan"
      ;;
  esac
}

function apply_config_for_binary {
  APP_BINARY=$1

  case "$APP_BINARY" in
    # Add new cases here for each binary that you want to handle.
    #
    # To find the name of the binary for any window, simply click
    # on it while this script is running. Some programs require the
    # the name of the binary (e.g. Blender is `blender`) but others
    # seem to include the full path (e.g. Firefox is `/usr/lib/firefox/firefox`).

    blender)
      apply_config "blender";;
    krita)
      apply_config "krita";;
    gimp-2.10)
      apply_config "gimp";;
    *)
      apply_config "default";;
  esac
}


#######################################################################
### Here be dragons.
#######################################################################

# Set up generally-sane defaults
function reset_config {
  for BUTTON in 1 2 3 $(seq 8 20); do
    wac_config *PAD "button $BUTTON $BUTTON"
  done
  for BUTTON in 1 2 3; do
    wac_config *STYLUS "button $BUTTON $BUTTON"
    wac_config *ERASER "button $BUTTON $BUTTON"
  done
  wac_config *PAD "AbsWheelUp button 4"
  wac_config *PAD "AbsWheelDown button 5"
  wac_config *PAD "RelWheelUp button 4"
  wac_config *PAD "RelWheelDown button 5"
}


# Call xsetwacom for the named device
function wac_config {
  DEVICE=$1
  SUFFIX=$2
  
  if [[ "${DEVICE:0:1}" == "*" ]]; then
    DEVICE="type: ${DEVICE#?}"
  fi
  DEVICE_IDS=$(wac_devices "$DEVICE")
  if [[ -z "$DEVICE_IDS" ]]; then
    echo "Unable to find any matches for $DEVICE"
    break
  fi
  
  for ID in $DEVICE_IDS; do
    xsetwacom set $ID $SUFFIX 2>/dev/null
  done
}


# Find device IDs based on a filter
function wac_devices {
  xsetwacom list | grep "$1" | cut -f2 | cut -d: -f2
}


# Keep an eye on the active window and change settings as needed
function window_spy {
  xprop -root -spy 32x '\t$0\n' _NET_ACTIVE_WINDOW | while read LINE; do
    WID=$(echo "$LINE" | cut -f2)
    APP_TITLE=$(xprop -id $WID '\t$0+\n' _NET_WM_NAME | cut -f2)
    APP_STATE=$(xprop -id $WID '\t$0+\n' _NET_WM_STATE | cut -f2)
    APP_BINARY=$(ps -p $(xprop -id $WID '\t$0+\n' _NET_WM_PID | cut -f2) -o cmd h)

    echo "Now focused: $APP_BINARY ($APP_STATE) -- $APP_TITLE"
    if [[ "$APP_STATE" == *"_NET_WM_STATE_SKIP_TASKBAR"* ]]; then
      echo "Ignoring focus change"
      continue
    fi

    apply_config_for_binary "$APP_BINARY"
  done
}

window_spy &
wait