home: wm: i3: show notification on toggling mute

Allow muting microphone and speakers, with refactor to make it DRY.

home/wm/i3/default.nix

@@ -249,8 +249,8 @@ in
             "XF86AudioLowerVolume" = "exec --no-startup-id ${changeAudio} down 5";
             "Control+XF86AudioRaiseVolume" = "exec --no-startup-id ${changeAudio} up 1";
             "Control+XF86AudioLowerVolume" = "exec --no-startup-id ${changeAudio} down 1";
-            "XF86AudioMute" = "exec pamixer --toggle-mute";
+            "XF86AudioMute" = "exec --no-startup-id ${changeAudio} toggle";
-            "XF86AudioMicMute" = "exec pamixer --default-source --toggle-mute";
+            "XF86AudioMicMute" = "exec --no-startup-id ${changeAudio} toggle mic";
 
             "XF86AudioPlay" = "exec playerctl play-pause";
             "XF86AudioNext" = "exec playerctl next";

pkgs/change-audio/change-audio

@@ -2,6 +2,13 @@
 
 set -euo pipefail
 
+NOTIFY=(
+    notify-send
+    -u low
+    -h string:x-canonical-private-synchronous:change-audio
+)
+
+do_change_volume() {
     if [ "$1" = "up" ]; then
         upDown="-i"
     else
@@ -10,8 +17,46 @@ fi
 
     pamixer --allow-boost "$upDown" "$2"
     newVolume="$(pamixer --get-volume || true)"
+    [ "$(pamixer --get-volume-human)" = "muted" ] && isMuted=true
 
-notify-send -u low \
+    MSG="Set volume to $newVolume%"
-    -h string:x-canonical-private-synchronous:change-audio \
+    if [ "${isMuted:-false}" = true ]; then
+        MSG="$MSG (muted)"
+    fi
+    "${NOTIFY[@]}" \
         -h "int:value:$newVolume" \
-    -- "Set volume to $newVolume%"
+        -- "$MSG"
+}
+
+do_toggle() {
+    args=()
+    if [ "${2:-audio}" = mic ]; then
+        args+=(--default-source)
+        MSG="Toggled microphone"
+    else
+        MSG="Toggled audio output"
+    fi
+
+    pamixer "${args[@]}" --toggle-mute
+
+    if [ "$(pamixer "${args[@]}" --get-mute)" = true ]; then
+        MSG="$MSG (muted)"
+    else
+        MSG="$MSG (unmuted)"
+    fi
+
+    "${NOTIFY[@]}" -- "$MSG"
+}
+
+case "$1" in
+    up|down)
+        do_change_volume "$@"
+        ;;
+    toggle)
+        do_toggle "$@"
+        ;;
+    *)
+        echo "No suche option '$1'" >&2
+        exit 1
+        ;;
+esac

pkgs/change-audio/default.nix

@@ -1,7 +1,7 @@
 { lib, libnotify, makeWrapper, pamixer, shellcheck, stdenvNoCC }:
 stdenvNoCC.mkDerivation rec {
   pname = "change-audio";
-  version = "0.1.1";
+  version = "0.2.0";
 
   src = ./change-audio;