add(hypridle): xscreensaver is back!

apps/hypridle/default.nix

@@ -1,9 +1,15 @@
 {pkgs, ...}: {
+  imports = [
+    ../xscreensaver
+  ];
+
   wayland.windowManager.hyprland.settings = {
     exec-once = [
       "uwsm app -- hypridle"
+      "uwsm app -- xscreensaver -no-splash"
     ];
   };
+
   services.hypridle = {
     enable = true;
     settings = {
@@ -15,10 +21,11 @@
       };
 
       listener = [
-        # {
-        #   timeout = 180; # 3min
-        #   on-timeout = "tte-screensaver";
-        # }
+        {
+          timeout = 180; # 3min
+          on-timeout = "${pkgs.xscreensaver}/bin/xscreensaver-command -activate";
+          on-resume = "${pkgs.xscreensaver}/bin/xscreensaver-command -deactivate";
+        }
         {
           timeout = 300; # 5min
           on-timeout = "hakase-hyprlock"; # lock screen when timeout has passed

apps/xscreensaver/default.nix

@@ -0,0 +1,16 @@
+{pkgs, ...}: {
+  home.packages = with pkgs; [
+    xscreensaver
+    cbonsai
+    cmatrix
+  ];
+
+  home.file.".xscreensaver".text = ''
+    # Tell xscreensaver to only run a single specific program
+    mode:       one
+    selected:   0
+
+    # Define the phosphor hack, scaling up the font size, and running cbonsai
+    programs: phosphor -delay 50000 -scale 2 -program "${pkgs.cbonsai}/bin/cbonsai -l -L -S"
+  '';
+}