sysvol: integrate as a service (sane.programs)

hosts/common/programs/default.nix

@@ -104,6 +104,7 @@
     ./swayidle.nix
     ./swaylock.nix
     ./swaynotificationcenter.nix
+    ./sysvol.nix
     ./tangram.nix
     ./tor-browser.nix
     ./tuba.nix

hosts/common/programs/sway/default.nix

@@ -116,12 +116,13 @@ in
       "swayidle"  # enable if you need it
       "swaylock"  # used by sway config
       "swaynotificationcenter"  # notification daemon
+      "sysvol"  # volume notifier
       "unl0kr"  # greeter
       "waybar"  # used by sway config
       "wdisplays"  # like xrandr
       "wireplumber"  # used by sway config
       "wl-clipboard"
-      "wob"  # render volume changes on-screen
+      # "wob"  # render volume changes on-screen
       "xdg-desktop-portal"
       # xdg-desktop-portal-gtk provides portals for:
       # - org.freedesktop.impl.portal.Access

hosts/common/programs/sysvol.nix

@@ -0,0 +1,86 @@
+{ config, lib, ... }:
+let
+  cfg = config.sane.programs.sysvol;
+in
+{
+  sane.programs.sysvol = {
+    configOption = with lib; mkOption {
+      default = {};
+      type = types.submodule {
+        options.autostart = mkOption {
+          type = types.bool;
+          default = true;
+        };
+      };
+    };
+
+    sandbox.method = "bwrap";
+    sandbox.whitelistAudio = true;
+    sandbox.whitelistWayland = true;
+
+    fs.".config/sys64/volume.css".symlink.text = ''
+      window {
+        background: #000000B4;
+        border-radius: 19px;
+      }
+      label {
+        color: #FFFFFF;
+      }
+      image {
+        margin-left: 9px;
+        color: #FFFFFFD0;
+      }
+
+      /* optionally, replace with `scale.horizontal` and `scale.vertical` for specialization */
+      scale {
+        margin: 0px;
+        padding: 0px;
+        margin-right: 7px;
+      }
+      scale trough {
+        border-radius: 12px;
+        background: #00000000;
+        border: none;
+        margin-left: 12px;
+        margin-right: 12px;
+      }
+      scale highlight {
+        margin-bottom: 3px;
+        margin-top: 3px;
+        border-radius: 12px;
+        background: #e1f0efdc;
+      }
+      scale slider {
+        margin: 0px;
+        margin-left: -12px;
+        margin-right: -12px;
+        padding: 0px;
+        /* background: #e1f0efFF; */
+        background: #f9fffc;
+        box-shadow: none;
+        min-height: 25px;
+        min-width: 25px;
+      }
+    '';
+
+    services."sysvol" = {
+      description = "sysvol: volume monitor/notifier";
+      after = [ "graphical-session.target" ];
+      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
+
+      serviceConfig = {
+        # options:
+        # -p {0,1,2,3}  to attach to top/right/bottom/left screen edge
+        # -t N          for the notifier to be dismissed after N seconds (integer only)
+        # -m N          to set the indicator this many pixels in from the edge
+        # -{H,W} N      to set the height/width of the notifier, in px.
+        # -i N          to set the size of the volume icon
+        # -P            to hide percentage text
+        ExecStart = "${cfg.package}/bin/sysvol -p 0 -t 1 -m 32 -H 39 -W 256 -i 32 -P";
+        Type = "simple";
+        Restart = "always";
+        RestartSec = "10s";
+      };
+    };
+  };
+}