run commands on cursor leaving or entering your machine when using barrier.

fence.sh

#!/bin/sh

# this script accompanies barrier (https://github.com/debauchee/barrier).
# it runs commands upon your mouse leaving or entering your machine.

# config
interval=2
check_count=10

# this hook runs when mouse enters this machine.
onlocal_hook()
{
    pgrep -x safeeyes && safeeyes --enable
    # remaps
}

# this hook runs when mouse leaves this machine.
onremote_hook()
{
    pgrep -x safeeyes && safeeyes --disable
    # pkill -x xcape
}

onlocal()
{
    [ $is_on_local = true ] && return
    is_on_local=true
    onlocal_hook
}

onremote()
{
    [ $is_on_local = false ] && return
    is_on_local=false
    onremote_hook
}

is_on_local=true
while :; do
    ! pidof -q barriers && sleep 10 && continue
    for i in $(seq 1 $check_count); do
        sleep $interval
        xprop -id $(xdotool getmouselocation | awk 'BEGIN{FS="window:"};{print $2}') |
            grep -xq 'TIMESTAMP(INTEGER) = ' && onremote || onlocal
    done
done