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";
-  sha256 = "sha256-lCaYGl+Y1iLtslDqAu/HTqpyWgSOnR+bMI0fKSwjW6w=";
+  url = "https://i.imgur.com/AKsJ3Rl.jpeg";
+  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

@@ -1,41 +1,46 @@
-{ config, ... }:
+{ config, lib, ... }:
 let
   style = config.module.style;
   wallpaper = config.module.wallpaper;
 in
 {
-  stylix = {
-    inherit (config.module.style) cursor;
-    enable = true;
-    autoEnable = true;
-    image = wallpaper.path;
-    polarity = "dark";
-    fonts = with style.font; {
-      inherit
-        emoji
-        monospace
-        sansSerif
-        serif
-        ;
-      sizes = with size; {
-        inherit desktop terminal;
-        applications = application;
-        popups = popup;
+  config = lib.mkMerge [
+    {
+      stylix = {
+        inherit (config.module.style) cursor;
+        enable = true;
+        autoEnable = true;
+        image = wallpaper.path;
+        polarity = "dark";
+        fonts = with style.font; {
+          inherit
+            emoji
+            monospace
+            sansSerif
+            serif
+            ;
+          sizes = with size; {
+            inherit desktop terminal;
+            applications = application;
+            popups = popup;
+          };
+        };
+        opacity = with style.opacity; {
+          inherit desktop terminal;
+          applications = application;
+          popups = popups;
+        };
       };
-    };
-    opacity = with style.opacity; {
-      inherit desktop terminal;
-      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; })
+  ];
 }