feat(hypr): implement display and keyboard backlight dimming

hypr/hypridle.conf

@@ -6,10 +6,22 @@ general {
 }
 
 listener {
-    timeout = 300                      # 5min
-    on-timeout = loginctl lock-session # lock screen when timeout has passed
+    timeout = 290
+    on-timeout = ~/.config/hypr/scripts/dim-display.sh dim
+    on-resume = ~/.config/hypr/scripts/dim-display.sh restore
 }
 
+listener {
+    timeout = 300
+    on-timeout = loginctl lock-session 
+}
+
+listener {
+    timeout = 300 
+    on-timeout = ~/.config/hypr/scripts/dim-keyboard.sh dim
+    on-resume = ~/.config/hypr/scripts/dim-keyboard.sh restore
+  }
+
 listener {
     timeout = 300                                            # 5.5min
     on-timeout = hyprctl dispatch dpms off                   # screen off when timeout has passed

hypr/scripts/dim-display.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCREEN_DEVICE="amdgpu_bl1"
+
+STATE_DIR="${XDG_RUNTIME_DIR:-/tmp}/hypridle"
+SCREEN_STATE_FILE="$STATE_DIR/screen"
+
+mkdir -p "$STATE_DIR"
+
+save_current() {
+  brightnessctl -d "$SCREEN_DEVICE" g >"$SCREEN_STATE_FILE"
+}
+
+dim() {
+  save_current
+  brightnessctl -d "$SCREEN_DEVICE" set 10%
+}
+
+restore() {
+  [[ -f "$SCREEN_STATE_FILE" ]] && brightnessctl -d "$SCREEN_DEVICE" s "$(cat "$SCREEN_STATE_FILE")"
+}
+
+case "${1:-}" in
+dim)
+  dim
+  ;;
+restore)
+  restore
+  ;;
+*)
+  echo "Usage: $0 {dim|restore}"
+  exit 1
+  ;;
+esac

hypr/scripts/dim-keyboard.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+KBD_DEVICE="chromeos::kbd_backlight"
+
+STATE_DIR="${XDG_RUNTIME_DIR:-/tmp}/hypridle"
+KBD_STATE_FILE="$STATE_DIR/kbd"
+
+mkdir -p "$STATE_DIR"
+
+save_current() {
+  brightnessctl -d "$KBD_DEVICE" g >"$KBD_STATE_FILE"
+}
+
+dim() {
+  save_current
+  brightnessctl -d "$KBD_DEVICE" set 0
+}
+
+restore() {
+  [[ -f "$KBD_STATE_FILE" ]] && brightnessctl -d "$KBD_DEVICE" s "$(cat "$KBD_STATE_FILE")"
+}
+
+case "${1:-}" in
+dim)
+  dim
+  ;;
+restore)
+  restore
+  ;;
+*)
+  echo "Usage: $0 {dim|restore}"
+  exit 1
+  ;;
+esac