#!/bin/sh
# Craig Jennings
# convenience script to switch monitors

# this script assumes there are at most two monitors attached and we want to switch between then
CHOICES="Laptop\nLaptop-Scaled\nHome-Display\nExternal-Auto\nExternal-Scaled\nVirtualbox"

# laptops always have a monitor connected when running the script.
LAPTOP=$(xrandr -q | grep primary | awk '$2 == "connected" {print $1}')
echo "primary monitor is $LAPTOP"

# an external monitor will always be a connected monitor that isn't primary
EXTERNAL=$(xrandr -q | grep -v primary | awk '$2 == "connected" {print $1}')

# start by resetting
xrandr -s 0

# disable if called automatically, otherwise you'll want the menu
# if there's only one monitor connected, setup laptop monitor
# if [ -z "$EXTERNAL" ]; then
# 	xrandr -s 0
#     xrandr --output "$LAPTOP" --auto --dpi 144 --scale 0.6
# 	exit 0
# fi

CHOSEN=$(echo -e "$CHOICES" | dmenu -i)

case "$CHOSEN" in
"Laptop")
	xrandr --output "$LAPTOP" --auto --output "$EXTERNAL" --off
	;;
"Laptop-Scaled")
	xrandr --output "$LAPTOP" --auto --dpi 144 --scale 0.6 --output "$EXTERNAL" --off
	;;
"External")
	xrandr --output "$EXTERNAL" --auto --dpi 96 --mode 3440x1440 --scale 1.0 --output "$LAPTOP" --off
	;;
"External-Auto")
	xrandr --output "$EXTERNAL" --auto --output "$LAPTOP" --off
	;;
"External-Scaled")
	xrandr --output "$EXTERNAL" --auto --scale 0.6 --output "$LAPTOP" --off
    ;;
"Virtualbox")
    xrandr --output "$LAPTOP" --auto --mode 1920x1080
    ;;
esac

# restore the wallpaper after resolution change
nitrogen --restore