From 9a1966900fd7fc91b513621e2985f0d7cb497c14 Mon Sep 17 00:00:00 2001
From: Michael Grote <michael.grote@posteo.de>
Date: Tue, 29 Jun 2021 13:53:10 +0200
Subject: [PATCH] polybar: brightness

---
 polybar/backlight.sh | 54 ++++++++++++++++++++++++++++++++++++++++++++
 polybar/config       | 12 +++++++++-
 2 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 polybar/backlight.sh

diff --git a/polybar/backlight.sh b/polybar/backlight.sh
new file mode 100644
index 0000000..69b53a6
--- /dev/null
+++ b/polybar/backlight.sh
@@ -0,0 +1,54 @@
+#!/bin/sh
+# This polybar script show the current brightness level and allows you to increase or decrease it by scrolling up or down with the mouse wheel
+#
+# Make sure you have inotify-tools (and brightnessctl obv) installed otherwise inotifywait won't work
+# You need to install a font from nerdfonts.com in order to see glyphs correctly. You can replace them with what you prefer
+# https://raw.githubusercontent.com/FedericoAntoniazzi/dotfiles/master/.config/polybar/backlight.sh
+brightness_level=$(brightnessctl g)
+brightness_max=$(brightnessctl m)
+brightness_percent=$(( $brightness_level * 100 / $brightness_max ))
+
+getIcon() {
+	if [ "$brightness_percent" -ge 90 ]; then
+	    icon=""
+	elif [ "$brightness_percent" -ge 75 ]; then
+	    icon=""
+	elif [ "$brightness_percent" -ge 50 ]; then
+	    icon=""
+	elif [ "$brightness_percent" -ge 40 ]; then
+	    icon=""
+	elif [ "$brightness_percent" -ge 25 ]; then
+	    icon=""
+	elif [ "$brightness_percent" -ge 10 ]; then
+	    icon=""
+	else
+	    icon=""
+	fi
+	echo "$icon"
+}
+
+increase(){
+	brightnessctl s +2% > /dev/null
+	return
+}
+
+decrease(){
+	brightnessctl s 2%- > /dev/null
+	return
+}
+
+
+case "$1" in
+	"increase")
+		increase
+		exit
+		;;
+	"decrease")
+		decrease
+		exit
+		;;
+	*)
+		inotifywait -q -m -e close_write /sys/class/backlight/intel_backlight/brightness |
+			echo "$(getIcon) $brightness_percent%"
+		;;
+esac
diff --git a/polybar/config b/polybar/config
index 592c752..4ed959b 100644
--- a/polybar/config
+++ b/polybar/config
@@ -63,6 +63,17 @@ exec = /home/mg/dotfiles/polybar/popup-calendar.sh
 interval = 5
 click-left = /home/mg/dotfiles/polybar/popup-calendar.sh --popup &
 
+[module/backlight]
+type = custom/script
+exec=/home/mg/dotfiles/polybar/backlight.sh
+tail=true
+interval=0
+scroll-up = /home/mg/dotfiles/polybar/backlight.sh increase
+scroll-down = /home/mg/dotfiles/polybar/backlight.sh decrease
+format-background = ${color.shade5}
+format-foreground = ${color.modulefg}
+format-padding = 1
+
 [module/xwindow]
 type = internal/xwindow
 label = %title:0:30:...%
@@ -179,7 +190,6 @@ format-disconnected =
 ;label-disconnected = %ifname% disconnected
 ;label-disconnected-foreground = ${colors.foreground-alt}
 
-
 [module/date]
 type = internal/date
 interval = 5