A script for managing monitors through xrandr. Also restarts any associated polybar bars when a monitor is enabled.
# List all monitors and aliases
monitors.sh list
# Enabling a monitor by name
monitors.sh enable HDMI-1
# Enabling a monitor by alias
monitors.sh enable top
# Disabling a monitor by alias
monitors.sh disable bottom| { | |
| "alias": { | |
| "main": "DVI-D-1", | |
| "top": "DVI-D-1", | |
| "bottom": "HDMI-1" | |
| }, | |
| "monitors": { | |
| "DVI-D-1": { | |
| "size": "1920x1080", | |
| "position": "0x0", | |
| "bars": "main status" | |
| }, | |
| "HDMI-1": { | |
| "size": "1920x1080", | |
| "position": "0x1080", | |
| "bars": "bottom" | |
| } | |
| } | |
| } |
| #!/bin/sh | |
| alias jq='cat monitors.json | jq -r' | |
| # Resolves the name of a monitor from an alias or name | |
| function resolve_monitor { | |
| name="$1" | |
| # check monitors object | |
| exists="$(jq '.monitors | has("'$name'")')" | |
| if [[ "$exists" == "true" ]]; then | |
| echo "$name" | |
| return 0 | |
| fi | |
| # check alias object | |
| exists=`jq '.alias | has("'$1'")'` | |
| if [[ "$exists" == "true" ]]; then | |
| jq '.alias["'$1'"]' | |
| return 0 | |
| fi | |
| return 1 | |
| } | |
| # Prints true or false depending on whether a monitor exists | |
| function monitor_exists { | |
| name="$(resolve_monitor "$1")" | |
| if [[ "$name" == "" ]]; then | |
| echo "false" | |
| return 1 | |
| fi | |
| jq '.monitors | has("'$name'")' | |
| } | |
| function list_monitors { | |
| monitors="$(jq -r '.monitors')" | |
| echo "Available monitors:" | |
| while IFS= read -r monitor; do | |
| size=$(jq -r '.monitors.["'$monitor'"].size') | |
| aliases=$(jq -r --arg monitor "$monitor" '.alias | to_entries | map(select(.value == $monitor) | .key) | join(", ")') | |
| echo " $monitor:" | |
| echo " Alias: $aliases" | |
| echo " Size: $size" | |
| done <<< "$(jq -r '.monitors | keys_unsorted[]')" | |
| } | |
| function kill_bars { | |
| bars="$1" | |
| [[ "$bars" == "" ]] && return | |
| for bar in $bars; do | |
| pids="$(ps aux | grep 'polybar '"$bar"'' | awk '{ print $2 }')" | |
| if [[ "$pids" != "" ]]; then | |
| kill $pids &> /dev/null | |
| fi | |
| done | |
| sleep 1 | |
| } | |
| function start_bars { | |
| bars="$1" | |
| for bar in $bars; do | |
| echo "enabling bar: $bar" | |
| polybar "$bar" &> /dev/null & | |
| sleep 1 | |
| done | |
| } | |
| function enable_monitor { | |
| name="$(resolve_monitor "$1")" | |
| if [[ "$(monitor_exists "$name")" != "true" ]]; then | |
| echo "invalid monitor: $1" | |
| exit 1 | |
| fi | |
| size="$(jq '.monitors["'$name'"].size')" | |
| position="$(jq '.monitors["'$name'"].position')" | |
| bars="$(jq '.monitors["'$name'"].bars')" | |
| echo "enabling monitor: $name" | |
| xrandr --output "$name" \ | |
| --mode "$size" \ | |
| --pos "$position" \ | |
| --rotate "normal" | |
| if [[ "$bars" != "" ]]; then | |
| kill_bars "$bars" | |
| enable_bars "$bars" | |
| fi | |
| } | |
| function disable_monitor { | |
| name="$(resolve_monitor "$1")" | |
| if [[ "$(monitor_exists "$name")" != "true" ]]; then | |
| echo "invalid monitor: $1" | |
| exit 1 | |
| fi | |
| bars="$(jq '.monitors["'$name'"].bars')" | |
| kill_bars "$bars" | |
| echo "disabling monitor: $name" | |
| xrandr --output "$name" --off | |
| } | |
| function usage { | |
| script_name="$1" | |
| echo "Usage: $script_name <command> <monitor>" | |
| echo "Available Commands:" | |
| echo " list List the available monitors." | |
| echo " enable <monitor> Enable the specified monitor." | |
| echo " disable <monitor> Disable the specified monitor." | |
| echo | |
| echo "Example:" | |
| echo " $script_name enable HDMI-1" | |
| echo " $script_name disable DVI-D-1" | |
| exit 1 | |
| } | |
| command="$1" | |
| case "$command" in | |
| "list") list_monitors;; | |
| "enable") enable_monitor "$2";; | |
| "disable") disable_monitor "$2";; | |
| *) usage "$0";; | |
| esac |