toggle_front.sh

#!/bin/bash
# REQUIRES: xdotool wmctrl
# AUTHOR: Ethan Djeric <me@ethandjeric.com>
# CONFIRMED WM COMPATIBILITY: kwin

# Usage:/path/to/toggle_front.sh </path/to/BINARY> <WINDOW CLASS>
#       /path/to/BINARY can be any callable command from $PATH that runs the program. 
#       <WINDOW CLASS> can be found by taking the constant part of the name present in the window bar; 
#       typically the format is <INSTANCE NAME> - <WINDOW NAME>. 

#       e.g. ~:fish - Konsole would be a instance of Konsole running a fish shell. 
#       e.g. To use this script with Konsole: /path/to/toggle_front.sh konsole Konsole

#       This script will not work if part of the window name is not constant across all instances of it,
#       although this is irregular behaviour.

binary=$1
wind_title=$2
if [[ "$(xdotool getactivewindow getwindowname)" == *"$wind_title"* ]]; then 
    xdotool windowminimize $(xdotool getactivewindow) 
else
    windId=$(wmctrl -l | awk -v pat="$(wmctrl -d | grep "*" | cut -d ' ' -f1)" '$2 ~ pat' | grep "$wind_title" | cut -d ' ' -f1)
    wmctrl -ia $windId || $binary & # using xdotool windowraise doesn't work here for kwin.
fi