From a63216cc145fb5587d410dc707ed9a1afa75b23d Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Fri, 6 Sep 2024 09:39:25 +0200
Subject: Add key bindings to change external monitor brightness

---
 i3/.i3/config        | 12 ++++---
 yoga/bin/night-light | 44 --------------------------
 yoga/bin/setmonitor  | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+), 48 deletions(-)
 delete mode 100755 yoga/bin/night-light
 create mode 100755 yoga/bin/setmonitor

diff --git a/i3/.i3/config b/i3/.i3/config
index 3647d28..a6952d5 100644
--- a/i3/.i3/config
+++ b/i3/.i3/config
@@ -48,10 +48,14 @@ bindsym XF86MonBrightnessUp exec bash -c 'echo "$(($(cat /sys/class/backlight/am
 bindsym XF86MonBrightnessDown exec bash -c 'echo "$(($(cat /sys/class/backlight/amdgpu_bl0/brightness)-10))" > /sys/class/backlight/amdgpu_bl0/brightness'
 bindsym Shift+XF86MonBrightnessUp exec bash -c 'echo 255 > /sys/class/backlight/amdgpu_bl0/brightness'
 bindsym Shift+XF86MonBrightnessDown exec bash -c 'echo 1 > /sys/class/backlight/amdgpu_bl0/brightness'
-bindsym Ctrl+XF86MonBrightnessUp exec night-light increase
-bindsym Ctrl+XF86MonBrightnessDown exec night-light decrease
-bindsym Ctrl+Shift+XF86MonBrightnessUp exec night-light day
-bindsym Ctrl+Shift+XF86MonBrightnessDown exec night-light night
+bindsym Ctrl+XF86MonBrightnessUp exec setmonitor dp-brightness increase
+bindsym Ctrl+XF86MonBrightnessDown exec setmonitor dp-brightness decrease
+bindsym Ctrl+ShiftXF86MonBrightnessUp exec setmonitor dp-brightness max
+bindsym Ctrl+ShiftXF86MonBrightnessDown exec setmonitor dp-brightness min
+bindsym $mod+XF86MonBrightnessUp exec setmonitor night-light increase
+bindsym $mod+XF86MonBrightnessDown exec setmonitor night-light decrease
+bindsym $mod+Shift+XF86MonBrightnessUp exec setmonitor night-light day
+bindsym $mod+Shift+XF86MonBrightnessDown exec setmonitor night-light night
 bindsym $mod+F7 exec toggle-dp
 bindsym $mod+Shift+F7 exec toggle-dp-brightness
 
diff --git a/yoga/bin/night-light b/yoga/bin/night-light
deleted file mode 100755
index b76054d..0000000
--- a/yoga/bin/night-light
+++ /dev/null
@@ -1,44 +0,0 @@
-#!/bin/bash
-# Usage: night-light [increase|decrease|day|night]
-set -e
-
-TMPFILE=/tmp/.night-light-index
-
-# https://askubuntu.com/a/1061304
-STEPS=(
-    "1:0.18172716:0.00000001"
-    "1:0.42322816:0.00000001"
-    "1:0.54360078:0.08679949"
-    "1:0.64373109:0.28819679"
-    "1:0.71976951:0.42860152"
-    "1:0.77987699:0.54642268"
-    "1:0.82854786:0.64816570"
-    "1:0.86860704:0.73688797"
-    "1:0.90198230:0.81465502"
-    "1:0.93853986:0.88130458"
-    "1:0.97107439:0.94305985"
-	"1:1:1"
-)
-
-CUR=$((${#STEPS[@]}-1))
-if [ -f $TMPFILE ]; then
-	CUR=$(cat $TMPFILE)
-fi
-
-case "$1" in
-	increase) NEW=$(($CUR >= ${#STEPS[@]} ? $CUR : $CUR+1)) ;;
-	decrease) NEW=$(($CUR <= 0 ? $CUR : $CUR-1)) ;;
-	day) NEW=$((${#STEPS[@]}-1)) ;;
-	night) NEW=0 ;;
-	*)
-		echo "Invalid argument '$1'"
-		exit 1
-		;;
-esac
-
-echo $NEW > $TMPFILE
-
-for MONITOR in $(xrandr --listactivemonitors | tail -n +2 | cut -d'+' -f2 | cut -d' ' -f1 | sed 's/^\*//'); do
-	BRIGHTNESS=$(xrandr --verbose | grep "^$MONITOR" -A5 | grep Brightness | cut -d':' -f2 | sed 's/\s*//')
-	xrandr --output $MONITOR --gamma ${STEPS[$NEW]} --brightness $BRIGHTNESS || true
-done
diff --git a/yoga/bin/setmonitor b/yoga/bin/setmonitor
new file mode 100755
index 0000000..f9fa5c1
--- /dev/null
+++ b/yoga/bin/setmonitor
@@ -0,0 +1,89 @@
+#!/bin/bash
+# Usage:
+# - setmonitor dp-brightness [increase|decrease|min|max]
+# - setmonitor night-light [increase|decrease|day|night]
+set -e
+
+if [ $# -ne 2 ]; then
+	echo 'Check setmonitor source for usage'
+	exit 1
+fi
+
+MONITORS="$(xrandr --listactivemonitors | tail -n +2 | cut -d'+' -f2 | cut -d' ' -f1 | sed 's/^\*//')"
+EXTERNAL_MONITORS="$(echo $MONITORS | tr ' ' '\n' | grep -v eDP)"
+
+# Usage: brightness MONITOR
+brightness () {
+	echo "$(xrandr --verbose | grep "^$1" -A5 | grep Brightness | cut -d':' -f2 | sed 's/\s*//')"
+}
+
+# Usage: dp_brightness [increase|decrease|min|max] MONITOR
+dp_brightness () {
+	STEP=5
+	BRIGHTNESS="$(bc <<< "$(brightness "$2")*100")"
+
+	case "$1" in
+		increase) BRIGHTNESS="$(bc <<< "$BRIGHTNESS+$STEP")" ;;
+		decrease) BRIGHTNESS="$(bc <<< "$BRIGHTNESS-$STEP")" ;;
+		min) BRIGHTNESS=0 ;;
+		max) BRIGHTNESS=100 ;;
+		*)
+			echo "Invalid argument '$1'"
+			exit 1
+			;;
+	esac
+
+	BRIGHTNESS="$(bc <<< "scale=2; $BRIGHTNESS/100")"
+
+	xrandr --output "$MONITOR" --brightness "$BRIGHTNESS"
+}
+
+# Usage: nightlight [increase|decrease|day|night]
+nightlight () {
+	TMPFILE=/tmp/.night-light-index
+
+	# https://askubuntu.com/a/1061304
+	STEPS=(
+		"1:0.18172716:0.00000001" "1:0.42322816:0.00000001" "1:0.54360078:0.08679949"
+		"1:0.64373109:0.28819679" "1:0.71976951:0.42860152" "1:0.77987699:0.54642268"
+		"1:0.82854786:0.64816570" "1:0.86860704:0.73688797" "1:0.90198230:0.81465502"
+		"1:0.93853986:0.88130458" "1:0.97107439:0.94305985" "1:1:1"
+	)
+
+	CUR=$((${#STEPS[@]}-1))
+	if [ -f $TMPFILE ]; then
+		CUR=$(cat $TMPFILE)
+	fi
+
+	case "$1" in
+		increase) NEW=$(($CUR >= ${#STEPS[@]} ? $CUR : $CUR+1)) ;;
+		decrease) NEW=$(($CUR <= 0 ? $CUR : $CUR-1)) ;;
+		day) NEW=$((${#STEPS[@]}-1)) ;;
+		night) NEW=0 ;;
+		*)
+			echo "Invalid argument '$1'"
+			exit 1
+			;;
+	esac
+
+	echo $NEW > $TMPFILE
+
+	for MONITOR in $MONITORS; do
+		BRIGHTNESS=$(brightness "$MONITOR")
+		xrandr --output "$MONITOR" --gamma "${STEPS[$NEW]}" --brightness "$BRIGHTNESS" || true
+	done
+}
+
+case "$1" in
+	dp-brightness)
+		for MONITOR in $EXTERNAL_MONITORS; do
+			dp_brightness "$2" "$MONITOR"
+		done
+		;;
+	night-light)
+		nightlight "$2"
+		;;
+	*)
+		echo 'Check setmonitor source for usage'
+		exit 1
+esac
-- 
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