From e718a248b90c4afaebc3680813b155ef0f85ebeb Mon Sep 17 00:00:00 2001
From: Riley Apeldoorn <me@riley.lgbt>
Date: Tue, 6 Jun 2023 17:14:33 +0200
Subject: [PATCH] Add support for volume keys

---
 script/vol                  | 19 +++++++++++++++++++
 shared/home/gui/default.nix |  2 ++
 shared/home/gui/sway.nix    |  6 ++++++
 3 files changed, 27 insertions(+)
 create mode 100755 script/vol

diff --git a/script/vol b/script/vol
new file mode 100755
index 0000000..9708615
--- /dev/null
+++ b/script/vol
@@ -0,0 +1,19 @@
+current=$(pactl get-sink-volume @DEFAULT_SINK@ | rg [0-9]+% -o | rg -o [0-9]+ | head -n 1)
+
+case "$1" in
+	"raise" ) {
+		if [ $current -ge 95 ];
+			then pactl set-sink-volume @DEFAULT_SINK@ 100%
+			else pactl set-sink-volume @DEFAULT_SINK@ +5%
+		fi
+	};;
+	"lower" ) {
+		if [ $current -le 5 ];
+			then pactl set-sink-volume @DEFAULT_SINK@ 0%
+			else pactl set-sink-volume @DEFAULT_SINK@ -5%
+		fi
+	};;
+	"toggle" ) {
+		pactl set-sink-mute @DEFAULT_SINK@ toggle
+	};;
+esac
diff --git a/shared/home/gui/default.nix b/shared/home/gui/default.nix
index 5e5be86..03f871c 100644
--- a/shared/home/gui/default.nix
+++ b/shared/home/gui/default.nix
@@ -20,6 +20,8 @@ in {
       fira-code
       # GUI programs
       pavucontrol
+      # We want `pactl` from the `pulseaudio` package
+      pulseaudio
     ];
   };
 
diff --git a/shared/home/gui/sway.nix b/shared/home/gui/sway.nix
index 4fed54e..7517d21 100644
--- a/shared/home/gui/sway.nix
+++ b/shared/home/gui/sway.nix
@@ -18,6 +18,8 @@ let mod = "Mod4";
       ${slurp}/bin/slurp | ${grim}/bin/grim -g - - | ${wl-clipboard}/bin/wl-copy -t image/png
     '');
 
+    vol = ../../../script/vol;
+
 in with lib; {
 
   options.custom.gui.wm = with types; {
@@ -100,6 +102,10 @@ in with lib; {
             "${mod}+Alt+Tab" = "exec ${pkgs.google-chrome}/bin/google-chrome-stable --ozone-platform-hint=auto --enable-features=VaapiVideoDecoder,VaapiVideoEncoder";
 
             "${mod}+Backspace" = "mode kill";
+
+            "XF86AudioRaiseVolume" = "exec ${vol} raise";
+            "XF86AudioLowerVolume" = "exec ${vol} lower";
+            "XF86AudioMute"        = "exec ${vol} toggle";
           }
         ];