Add proper support for custom schemes.

option/Wallpaper.nix

@@ -4,6 +4,20 @@ let
   url = "https://i.imgur.com/KkZFMD3.png";
   sha256 = "sha256-cTNUeamZTjQDx8gGZkU1mj4kKS3FEE0+EDzFb5bsyZE=";
   forceContrastText = false;
+
+  # SEE: https://github.com/tinted-theming/schemes
+  # Blue:     "${pkgs.base16-schemes}/share/themes/moonlight.yaml"
+  # Brown:    "${pkgs.base16-schemes}/share/themes/sandcastle.yaml"
+  # Classy:   "${pkgs.base16-schemes}/share/themes/monokai.yaml"
+  # Cold:     "${pkgs.base16-schemes}/share/themes/nord.yaml"
+  # Cool:     "${pkgs.base16-schemes}/share/themes/tokyo-night-dark.yaml"
+  # Gray:     "${pkgs.base16-schemes}/share/themes/nova.yaml"
+  # Material: "${pkgs.base16-schemes}/share/themes/material.yaml"
+  # Purple:   "${pkgs.base16-schemes}/share/themes/shades-of-purple.yaml"
+  # Retro:    "${pkgs.base16-schemes}/share/themes/mocha.yaml"
+  # Warm:     "${pkgs.base16-schemes}/share/themes/gruvbox-dark-hard.yaml"
+  # scheme = "${pkgs.base16-schemes}/share/themes/moonlight.yaml";
+  scheme = null;
 in
 {
   options.module.wallpaper = {
@@ -15,5 +29,15 @@ in
       default = pkgs.fetchurl { inherit url sha256; };
       type = lib.types.path;
     };
+    scheme = lib.mkOption {
+      default = scheme;
+      type =
+        with lib.types;
+        nullOr (oneOf [
+          path
+          lines
+          attrs
+        ]);
+    };
   };
 }

system/Stylix.nix

@@ -4,7 +4,7 @@ let
   wallpaper = config.module.wallpaper;
 in
 {
-  stylix =
+  stylix = lib.mkMerge [
     {
       inherit (config.module.style) cursor;
       enable = true;
@@ -30,11 +30,13 @@ in
         popups = popup;
       };
     }
-    // (lib.optionalAttrs wallpaper.forceContrastText {
+    (lib.mkIf wallpaper.forceContrastText {
       override = {
         base04 = "000000";
         base05 = "ffffff";
         base06 = "ffffff";
       };
-    });
+    })
+    (lib.mkIf (wallpaper.scheme != null) { base16Scheme = wallpaper.scheme; })
+  ];
 }