hyprpaper: init (#377)

Initialize the 'hyprpaper' module.

In the future, it might be possible to 'unload' the one-off wallpaper to reduce
the running memory usage [1]:

> Preload does exactly what it says. It loads the entire wallpaper into
> memory. This can result in around 8 - 20MB of mem usage. It is not
> recommended to preload every wallpaper you have, as it will be a)
> taking a couple seconds at the beginning to load and b) take 100s of
> MBs of disk and RAM usage.
>
> Preload is meant only for situations in which you want a wallpaper to
> switch INSTANTLY when you issue a wallpaper keyword (e.g. wallpaper
> per workspace)
>
> In any and all cases when you don't mind waiting 300ms for the
> wallpaper to change, consider making a script that:
>  - preloads the new wallpaper
>  - sets the new wallpaper
>  - unloads the old wallpaper (to free memory)
>
> -- Hyprpaper [2]

[1]: #408
[2]: https://github.com/hyprwm/hyprpaper/blob/678d0e8959cf7adbc3825d578595e82305573991/README.md?plain=1#L103-L111

Co-authored-by: NAHO <[email protected]>

modules/hyprland/hm.nix

@@ -24,6 +24,12 @@ in {
   options.stylix.targets.hyprland.enable =
     config.lib.stylix.mkEnableTarget "Hyprland" true;
 
-  config.wayland.windowManager.hyprland.settings =
-    lib.mkIf (config.stylix.enable && config.stylix.targets.hyprland.enable) settings;
+  config =
+    lib.mkIf
+    (config.stylix.enable && config.stylix.targets.hyprland.enable)
+    {
+      services.hyprpaper.enable = true;
+      stylix.targets.hyprpaper.enable = true;
+      wayland.windowManager.hyprland.settings = settings;
+    };
 }

modules/hyprpaper/hm.nix

@@ -0,0 +1,14 @@
+{ config, lib, ... }: {
+  options.stylix.targets.hyprpaper.enable =
+    config.lib.stylix.mkEnableTarget "Hyprpaper" true;
+
+  config =
+    lib.mkIf
+    (config.stylix.enable && config.stylix.targets.hyprpaper.enable)
+    {
+      services.hyprpaper.settings = {
+        preload = [ "${config.stylix.image}" ];
+        wallpaper = [ ",${config.stylix.image}" ];
+      };
+    };
+}