Remaps script to remap TAB key to Mod while pressed and TAB when released; remap CapsLock to Ctrl while pressed and ESC when released.

remaps

#!/bin/sh

[ "$1" = "-r" ] && prompt "Remap keyboard layout?" "$HOME/.local/bin/remaps_kb_layout"

# comments

		# This script is called on startup to remap keys.
		# Increase key speed via a rate change
		xset r rate 300 50
		# Map the caps lock key to super...
		# setxkbmap -option capslock:super
		# But when it is pressed only once, treat it as escape.
		# killall xcape 2>/dev/null ; xcape -e 'Super_L=Escape'
		# Map the menu button to right super as well.
		# xmodmap -e 'keycode 135 = Super_R'
		# Turn off the caps lock if on since there is no longer a key for it.
		# xset -q | grep "Caps Lock:\s*on" && xdotool key Caps_Lock


		# reset keybinginds, it'll mess up the tab key (presses like 5 tabs at a time) unless it is run
		# source https://askubuntu.com/questions/29603/how-do-i-clear-xmodmap-settings
		
	setxkbmap
	setxkbmap


# ********** MAIN PROGRAM starts here************

# ignore this
#	xmodmap -e ""

# map CapsLock key to Esc when released, Ctrl while pressed.
	setxkbmap -option "ctrl:nocaps"
	xcape -e 'Control_L=Escape'



# Turn TAB key into Tab when released, Meta (WIndows key) while pressed

	spare_mod="Hyper_L"
	xmodmap -e "keycode 23 = $spare_mod"
		# keycode 23 = TAB key
	xmodmap -e "remove mod4 = $spare_mod"
	 # does not work
	 # xmodmap -e "add Super = $spare_mod"
	xmodmap -e "keycode 133 = $spare_mod"
		# keycode 133 = Mod key
	xmodmap -e "keycode any = Tab"	# 'Tab' is case sensitive
	xcape -e "$spare_mod=Tab" 	# 'Tab' is case sensitive


# below this there's just comments...

	# done using xcape's examples from its man page xcape(1)

	# excerpt from xcape(1), EXAMPLES section:
			# EXAMPLES
			#        Make  Left  Shift  generate Escape when
			#        pressed and released on it's  own,  and
			#        Left  Control  generate Ctrl-O combina‐
			#        tion when pressed and released on  it's
			#        own:
			#               xcape   -e  'Shift_L=Escape;Con‐
			#               trol_L=Control_L|O'
			#
			#        In conjugation with xmodmap it is  pos‐
			#        sible to make an ordinary key act as an
			#        extra modifier. First map  the  key  to
			#        the  modifier with xmodmap and then the
			#        modifier back to the key with xcape. As
			#        an  example,  we can make the space bar
			#        work as an  additional  ctrl  key  when
			#        held  with  the  following  sequence of
			#        commands:
			#
			#        First, map an unused modifier's  keysym
			#        to the spacebar's keycode and make it a
			#        control modifier. It needs to be an ex‐
			#        isting  key  so  that emacs won't spazz
			#        out when you press  it.  Hyper_L  is  a
			#        good candidate.
			#
			#               spare_modifier="Hyper_L"
			#               xmodmap -e "keycode 65 = $spare_modifier"
			#               xmodmap -e "remove mod4 = $spare_modifier"
			#               # hyper_l is mod4 by default
			#               xmodmap -e "add Control = $spare_modifier"
			#
			#        Next,  map  space  to an unused keycode
			#        (to keep it around for xcape to use).
			#
			#               xmodmap -e "keycode any = space"
			#
			#        Finally use xcape to  cause  the  space
			#        bar to generate a space when tapped.
			#
			#               xcape -e "$spare_modifier=space"