mako: Implement notification inhibition

Fixes #43.

pkgs/default.nix

@@ -28,4 +28,15 @@ in
       })
     ];
   });
+
+  # TODO: Remove patch once mako > 1.4.1 is released and in nixpkgs
+  mako = super.mako.overrideAttrs (o: o // {
+    patches = [
+      # Adds makoctl set
+      (super.fetchpatch {
+        url = "https://github.com/emersion/mako/commit/782ef66b04d5d927fe19254be175e0b5ddff343f.patch";
+        sha256 = "1qjaxhf11fyysmi9l8vwrz2vag3lcbllx8y8v2fgg3p52a7cwdjs";
+      })
+    ];
+  });
 }

users/simon/files/waybar/style.css

@@ -151,3 +151,8 @@ window#waybar {
 #tray {
   padding: 0 5px;
 }
+
+#custom-notification_inhibitor.active {
+  background-color: @base3@;
+  color: @base03@;
+}

users/simon/modules/sway.nix

@@ -22,6 +22,8 @@ let
   wallpaper = if nixosConfig.sbruder.unfree.allowAssets then wallpaperUnfree else wallpaperFree;
 
   cfg = config.wayland.windowManager.sway.config;
+
+  makoInhibitStateFile = "${config.xdg.dataHome}/mako/inhibit-state";
 in
 lib.mkIf nixosConfig.sbruder.gui.enable {
   wayland.windowManager.sway = {
@@ -319,6 +321,7 @@ lib.mkIf nixosConfig.sbruder.gui.enable {
         "tray"
         "custom/redshift"
         "idle_inhibitor"
+        "custom/notification_inhibitor"
         "backlight"
         "mpd"
         "pulseaudio"
@@ -359,6 +362,37 @@ lib.mkIf nixosConfig.sbruder.gui.enable {
           deactivated = " ";
         };
       };
+      "custom/notification_inhibitor" = {
+        exec = pkgs.writeShellScript "notification-inhibitor-watch-state" ''
+          set -euo pipefail
+          (echo; ${pkgs.inotify-tools}/bin/inotifywait -m -e close_write ${lib.escapeShellArg makoInhibitStateFile} 2>/dev/null) \
+              | (while read line; do
+                    if [ "$(cat ${lib.escapeShellArg makoInhibitStateFile})" = "1" ]; then
+                        echo '{"alt": "active", "class": "active"}'
+                    else
+                        echo '{"alt": "inactive", "class": "inactive"}'
+                    fi
+                done)
+        '';
+        return-type = "json";
+        format = "{icon}";
+        format-icons = {
+          active = "${lrm}ﮖ ";
+          inactive = "${lrm}ﮗ ";
+        };
+        tooltip = false;
+        on-click = pkgs.writeShellScript "toggle-notification-inhibit" ''
+          set -e
+          current_state="$(cat ${lib.escapeShellArg makoInhibitStateFile})"
+          if [ "$current_state" = "0" ]; then
+              ${pkgs.mako}/bin/makoctl set invisible=true
+              echo 1 > ${lib.escapeShellArg makoInhibitStateFile}
+          else
+              ${pkgs.mako}/bin/makoctl set invisible=false
+              echo 0 > ${lib.escapeShellArg makoInhibitStateFile}
+          fi
+        '';
+      };
       backlight = {
         format = "{percent}% {icon}";
         format-icons = [ " " " " " " " " " " " " " " ];
@@ -515,6 +549,11 @@ lib.mkIf nixosConfig.sbruder.gui.enable {
     Install.WantedBy = [ "sway-session.target" ];
 
     Service = {
+      ExecStartPre = toString (pkgs.writeShellScript "reset-mako-inhibit-state" ''
+        set -e
+        mkdir -p "$(dirname ${lib.escapeShellArg makoInhibitStateFile})"
+        echo 0 > ${lib.escapeShellArg makoInhibitStateFile}
+      '');
       ExecStart = "${pkgs.mako}/bin/mako";
       Restart = "on-failure";
     };