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#!/usr/bin/env bash
PID=$$
get_mode() {
swaymsg -t get_outputs -r | jq ".[$1].modes[0]"
}
get_name() {
swaymsg -t get_outputs -r | jq -r ".[$1].name"
}
get_width() {
get_mode "$1" | jq ".width"
}
get_height() {
get_mode "$1" | jq ".width"
}
get_refresh() {
get_mode "$1" | jq ".refresh" | rev | cut -c 4- | rev
}
get_placement() {
# $1 - monitor placement
# $2 - monitor index compared
# $3 - monitor compared scale
WIDTH="$(jq -n "$(get_width $2)/$3" | awk -F. '{print $1}')"
case $1 in
"NONE")
echo "0 0"
;;
"RIGHT")
echo "$WIDTH 0"
;;
*)
echo "0 0"
;;
esac
}
update() {
# $1 - monitor index
# $2 - monitor scale
# $3 - monitor placement
# $4 - monitor index compared
# $5 - monitor compared scale
swaymsg output "$(get_name $1)" "enable"
swaymsg output "$(get_name $1)" resolution "$(get_width $1)x$(get_height $1)@$(get_refresh $1)hz" scale $2 position "$(get_placement $3 $4 $5)"
}
off() {
swaymsg output "$(get_name $1)" "disable"
}
get_id() {
i=0
while true; do
NAME="$(get_name $i)"
if [ $(echo "$NAME" | grep "^$1") ]; then
echo "$i"
return 0
elif [ "$NAME" == "null" ]; then
return 1
fi
((i=i+1))
done
}
die() {
notify-send -u critical -t 3000 "Sway" "$1"
kill $PID
}
PRIMARY=$(get_id "eDP-1" || die "Failed to get primary display")
EXTERNAL=$(get_id "DP" || get_id "HDMI" || die "Failed to get external display")
PRIMARY_SCALE=$2
EXTERNAL_SCALE=1
set_monitors() {
update $EXTERNAL $EXTERNAL_SCALE $1 $PRIMARY $PRIMARY_SCALE
update $PRIMARY $PRIMARY_SCALE $2 $EXTERNAL $EXTERNAL_SCALE
}
set_left() {
set_monitors "NONE" "RIGHT"
}
set_right() {
set_monitors "RIGHT" "NONE"
}
set_primary_only() {
set_monitors "NONE" "NONE"
off $EXTERNAL
}
set_external_only() {
set_monitors "NONE" "NONE"
off $PRIMARY
}
case $1 in
"LEFT")
set_left
notify-send -t 3000 "Sway" "External display set to left aligned"
;;
"RIGHT")
set_right
notify-send -t 3000 "Sway" "External display set to right aligned"
;;
"PRIMARY_ONLY")
set_primary_only
notify-send -t 3000 "Sway" "Set to primary display only"
;;
"EXTERNAL_ONLY")
set_external_only
notify-send -t 3000 "Sway" "Set to external display only"
;;
esac
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