Wallpaper: Add support for predefined styles.

option/Wallpaper.nix

@@ -1,9 +1,13 @@
 # Download the wallpaper here.
 { pkgs, lib, ... }:
 let
-  url = "https://i.imgur.com/03KK4WG.jpeg";
+  url = "https://i.imgur.com/AKsJ3Rl.jpeg";
-  sha256 = "sha256-lCaYGl+Y1iLtslDqAu/HTqpyWgSOnR+bMI0fKSwjW6w=";
+  sha256 = "sha256-DIgboGiIGJb2bKi7zqb17m7jctEgWyrSI/mSypeV7dQ=";
   forceContrastText = false;
+
+  # SEE: https://github.com/tinted-theming/schemes
+  # Warm: "${pkgs.base16-schemes}/share/themes/gruvbox-dark-hard.yaml"
+  style = null;
 in
 {
   options.module.wallpaper = {
@@ -15,5 +19,9 @@ in
       default = pkgs.fetchurl { inherit url sha256; };
       type = lib.types.path;
     };
+    style = lib.mkOption {
+      default = style;
+      type = with lib.types; nullOr (oneOf [ path lines attrs ]);
+    };
   };
 }

system/Stylix.nix

@@ -1,9 +1,11 @@
-{ config, ... }:
+{ config, lib, ... }:
 let
   style = config.module.style;
   wallpaper = config.module.wallpaper;
 in
 {
+  config = lib.mkMerge [
+    {
       stylix = {
         inherit (config.module.style) cursor;
         enable = true;
@@ -28,14 +30,17 @@ in
           applications = application;
           popups = popups;
         };
-    override =
-      if wallpaper.forceContrastText then
-        {
-          base04 = "000000";
-          base05 = "ffffff";
-          base06 = "ffffff";
-        }
-      else
-        { };
       };
+    }
+
+    (lib.mkIf wallpaper.forceContrastText {
+      stylix.override = {
+        base04 = lib.mkForce "000000";
+        base05 = lib.mkForce "ffffff";
+        base06 = lib.mkForce "ffffff";
+      };
+    })
+
+    (lib.mkIf (wallpaper.style != null) { stylix.base16Scheme = wallpaper.style; })
+  ];
 }