dotfiles-guix/home-config/sway/scripts.d/project.sh

#!/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 $i)"
        if [ "$NAME" == "$1" ]; then
            echo "$i"
            exit 0
        elif [ "$NAME" == "null" ]; then
            notify-send -u critical -t 3000 "Sway" "Failed to get display"
            kill $PID
            exit 1
        fi
        ((i=i+1))
    done
}

PRIMARY=$(get_id "eDP-1")
EXTERNAL=$(get_id "DP-1" || get_id "HDMI-1" || get_id "HDMI-A-1")

PRIMARY_SCALE=1.5
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