Uses xmodmap + xcape to use the MicroPC's bottom row a bit more efficiently

gpd-micropc-keyboard.sh

#!/usr/bin/env bash

# resets keyboard; kills all running instances of xcape
reset_kbd () {
  local xcape_cnt=$(pgrep xcape | wc -l)

  echo "  - reset_kbd"
  echo "    - killing $xcape_cnt instances of xcape"

  setxkbmap -layout us
  killall xcape
}

# swaps the super key with alt/meta
super_alt_swap() {
  echo "  - super_alt_swap"

  xmodmap -e 'keycode 64 = Super_L'
  xmodmap -e 'keycode 133 = Alt_L'
  xmodmap -e 'clear mod1'
  xmodmap -e 'clear mod4'
  xmodmap -e 'add mod4 = Super_L'
}

# when capslk is held, it acts as ctrl
# when capslk is tapped, it acts as esc
caps_to_ctrl() {
  echo "  - caps_to_ctrl"

  xmodmap -e 'clear lock'
  xmodmap -e 'clear control'
  xmodmap -e 'keycode 66 = Control_L'
  xmodmap -e 'add control = Control_L Control_R'

  xcape -e 'Control_L=Escape' -t 175
}

# when the /+? key is held, it acts as super
# when the /+? key is tapped, it acts as a normal /+? key
slash_to_super () {
  echo "  - slash_to_super"

  xmodmap -e 'keycode 61 = Super_R'
  xmodmap -e 'keycode any = slash question'

  xcape -e 'Super_R=slash|question' -t 175
}

# when the \+| key is held, it acts as ctrl
# when the \+| key is tapped, it acts as a normal \+| key
bar_to_ctrl() {
  echo "  - bar_to_ctrl"

  xmodmap -e 'keycode 51 = Hyper_L'
  xmodmap -e 'remove mod4 = Hyper_L'
  xmodmap -e 'add Control = Hyper_L'
  xmodmap -e 'keycode any = backslash bar'

  xcape -e 'Hyper_L=backslash|bar' -t 175
}

# when left-hand super key is held, it acts normal
# when left-hand super key is tapped, it triggers XF86Documents
#   which is a unique key not used on the MPC and can be bound to anything -
#   like a chat app
alt_to_chat() {
  echo "  - alt_to_chat"

  xcape -e "Alt_L=XF86Documents" -t 175
}

# when left-hand alt/meta key is held, it acts normal
# when left-hand alt/meta key is tapped, it triggers F12
#   which can be bound to something like a guake-like terminal
super_to_f12() {
  echo "  - super_to_f12"

  xcape -e 'Super_L=F12' -t 175
}




# actually call the functions (allows ordering and temporarily disabling)
#   if needed
reset_kbd
caps_to_ctrl
super_alt_swap
bar_to_ctrl
slash_to_super
alt_to_chat
super_to_f12

notify-send "Keyboard Configured/Reset"