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#!/bin/bash
# Assuming there are two displays. A small one (e.g. laptop) and a big
# one (e.g. monitor). Identify the displays, and toggle between 3
# states: small one only -> both with the big one to the left of the
# small one -> big one only
# small one: <20 inch
# big one: >20 inch
# Make sure the variables from pipe can be assigned
# https://stackoverflow.com/questions/42963395/bash-assign-variable-from-pipe
shopt -s lastpipe
i=0
regex="^([^ ]+).* .*$"
# Read the output of xrandr for connected display names and sizes
xrandr | grep " connected " | while IFS=$'\n' read -r line; do
if [[ $line =~ $regex ]]; then
name["$i"]="${BASH_REMATCH[1]}"
(( i++ ))
fi
done
if (( i == 1 )); then
echo "Only one connected display"
exit 1
fi
regex="^.*/([0-9]+)x.*/([0-9]+).* ([^ ]+)$"
xrandr --listactivemonitors | while IFS=$'\n' read -r line; do
if [[ $line =~ $regex ]]; then
if (( "${BASH_REMATCH[1]}" > 500 )); then
bigger="${BASH_REMATCH[3]}"
if [[ $bigger == "${name[0]}" ]]; then
smaller=${name[1]}
else
smaller=${name[0]}
fi
else
smaller="${BASH_REMATCH[3]}"
if [[ $smaller == "${name[0]}" ]]; then
bigger=${name[1]}
else
bigger=${name[0]}
fi
fi
fi
done
# If only smaller on, then have both on
if ! xrandr --listactivemonitors | grep -q "$bigger"; then
xrandr --output "$bigger" --primary --auto --output "$smaller" --right-of "$bigger" --auto
# if only bigger on, then only smaller on
elif ! xrandr --listactivemonitors | grep -q "$smaller"; then
xrandr --output "$bigger" --auto --left-of "$smaller" --output "$smaller" --primary --auto
xrandr --output "$bigger" --off
# if both are on, then only bigger on
else
xrandr --output "$bigger" --primary --auto --left-of "$smaller" --output "$smaller" --auto
xrandr --output "$smaller" --off
fi
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