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#!/usr/bin/env bash
#
# wayar-dwl.sh - display dwl tags, layout, and active title
# Based heavily upon this script by user "novakane" (Hugo Machet) used to do the same for yambar
# https://codeberg.org/novakane/yambar/src/branch/master/examples/scripts/dwl-tags.sh
#
# USAGE: waybar-dwl.sh MONITOR COMPONENT
# "COMPONENT" is an integer representing a dwl tag OR "layout" OR "title"
#
# REQUIREMENTS:
# - inotifywait ( 'inotify-tools' on arch )
# - Launch dwl with `dwl > ~.cache/dwltags` or change $fname
#
# Now the fun part
#
### Example ~/.config/waybar/config
#
# {
# "modules-left": ["custom/dwl_tag#0", "custom/dwl_tag#1", "custom/dwl_tag#2", "custom/dwl_tag#3", "custom/dwl_tag#4", "custom/dwl_tag#5", "custom/dwl_layout", "custom/dwl_title"],
# // The empty '' argument used in the following "exec": fields works for single-monitor setups
# // For multi-monitor setups, see https://github.com/Alexays/Waybar/wiki/Configuration
# // and enter the monitor id (like "eDP-1") as the first argument to waybar-dwl.sh
# "custom/dwl_tag#0": {
# "exec": "/path/to/waybar-dwl.sh '' 0",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#1": {
# "exec": "/path/to/waybar-dwl.sh '' 1",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#2": {
# "exec": "/path/to/waybar-dwl.sh '' 2",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#3": {
# "exec": "/path/to/waybar-dwl.sh '' 3",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#4": {
# "exec": "/path/to/waybar-dwl.sh '' 4",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#5": {
# "exec": "/path/to/waybar-dwl.sh '' 5",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#6": {
# "exec": "/path/to/waybar-dwl.sh '' 6",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#7": {
# "exec": "/path/to/waybar-dwl.sh '' 7",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#8": {
# "exec": "/path/to/waybar-dwl.sh '' 8",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_tag#9": {
# "exec": "/path/to/waybar-dwl.sh '' 9",
# "format": "{}",
# "return-type": "json"
# },
# "custom/dwl_layout": {
# "exec": "/path/to/waybar-dwl.sh '' layout",
# "format": "{}",
# "escape": true,
# "return-type": "json"
# },
# "custom/dwl_title": {
# "exec": "/path/to/waybar-dwl.sh '' title",
# "format": "{}",
# "escape": true,
# "return-type": "json"
# }
# }
#
### Example ~/.config/waybar/style.css
# #custom-dwl_layout {
# color: #EC5800
# }
#
# #custom-dwl_title {
# color: #017AFF
# }
#
# #custom-dwl_tag {
# color: #875F00
# }
#
# #custom-dwl_tag.selected {
# color: #017AFF
# }
#
# #custom-dwl_tag.urgent {
# background-color: #FF0000
# }
#
# #custom-dwl_tag.active {
# border-top: 1px solid #EC5800
# }
# Variables
declare output title layout activetags selectedtags
declare -a tags name
readonly fname="$HOME"/.cache/dwltags
tags=( "1" "2" "3" "4" "5" "6" "7" "8" "9" )
name=( "1" "2" "3" "4" "5" "6" "7" "8" "9" ) # Array of labels for tags
monitor="${1}"
component="${2}"
_cycle() {
case "${component}" in
[012345678])
this_tag="${component}"
unset this_status
mask=$((1<<this_tag))
if (( "${activetags}" & mask )) 2>/dev/null; then this_status+='"active",' ; fi
if (( "${selectedtags}" & mask )) 2>/dev/null; then this_status+='"selected",'; fi
if (( "${urgenttags}" & mask )) 2>/dev/null; then this_status+='"urgent",' ; fi
if [[ "${this_status}" ]]; then
printf -- '{"text":" %s ","class":[%s]}\n' "${name[this_tag]}" "${this_status}"
else
printf -- '{"text":" %s "}\n' "${name[this_tag]}"
fi
;;
layout)
printf -- '{"text":" %s "}\n' "${layout}"
;;
title)
printf -- '{"text":"%s"}\n' "${title}"
;;
*)
printf -- '{"text":"INVALID INPUT"}\n'
;;
esac
}
while [[ -n "$(pgrep waybar)" ]] ; do
[[ ! -f "${fname}" ]] && printf -- '%s\n' \
"You need to redirect dwl stdout to ~/.cache/dwltags" >&2
# Get info from the file
output="$(grep "${monitor}" "${fname}" | tail -n6)"
title="$(echo "${output}" | grep '^[[:graph:]]* title' | cut -d ' ' -f 3- | sed s/\"/“/g )" # Replace quotes - prevent waybar crash
layout="$(echo "${output}" | grep '^[[:graph:]]* layout' | cut -d ' ' -f 3- )"
#selmon="$(echo "${output}" | grep 'selmon')"
# Get the tag bit mask as a decimal
activetags="$(echo "${output}" | grep '^[[:graph:]]* tags' | awk '{print $3}')"
selectedtags="$(echo "${output}" | grep '^[[:graph:]]* tags' | awk '{print $4}')"
urgenttags="$(echo "${output}" | grep '^[[:graph:]]* tags' | awk '{print $6}')"
_cycle
# 60-second timeout keeps this from becoming a zombified process when waybar is no longer running
inotifywait -t 60 -qq --event modify "${fname}"
done
unset -v activetags layout name output selectedtags tags title
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