Update: brightness script for external monitors

sway/brightness_lock.sh

@@ -1,13 +1,26 @@
 #!/usr/bin/env bash
-# Locks the screen and lowers-brightness. Restores brightness on unlock
-declare brightness_lvl;
+# Locks the screens and lowers-brightness. Restores brightness on unlock
 
-if ! command -v ddcutil &>/dev/null && command -v light &>/dev/null; then
+# Defaults for levels when restored
+declare light_restore=3
+declare ddc_restore=3
+
+# Levels when dimmed
+declare -ri light_dim=1
+declare -ri ddc_dim=1
+
+get_brightness() {
+  local lvl
+
+  if command light &>/dev/null; then
     lvl="$(light -G)"
 
-  (swaylock; light -S "$lvl") &
-  light -S 1
-elif command -v ddcutil &>/dev/null; then
+    if [[ $lvl =~ ^[0-9]+(\.[0-9]+)?$ ]]; then
+      light_restore="$lvl"
+    fi
+  fi
+
+  if command ddcutil &>/dev/null; then
     lvl="$(ddcutil getvcp 10 | awk '{
       gsub(" ","");  # Remove spaces
       split($0, a, "=");
@@ -15,14 +28,25 @@ elif command -v ddcutil &>/dev/null; then
       print a[1]
     }')"
 
-  if [[ "$lvl" =~ ^[0-9]+$ ]]; then
-    (swaylock; ddcutil setvcp 10 "$lvl") &
-    ddcutil setvcp 10 1
-  else
-    swaylock
+    if [[ $lvl =~ ^[0-9]+$ ]]; then
+      ddc_restore="$lvl"
     fi
-else
-  swaylock
-fi
+  fi
+}
 
+set_brightness() {
+  local -r light_lvl="$1"
+  local -r ddc_lvl="$2"
 
+  if command light &>/dev/null; then
+    light -S "$light_lvl"
+  fi
+
+  if command ddcutil &>/dev/null; then
+    ddcutil setvcp 10 "$ddc_lvl"
+  fi
+}
+
+get_brightness
+(swaylock; set_brightness $light_restore $ddc_restore) &
+set_brightness $light_dim $ddc_dim