feature: add base16 support (#389)

* modules: add base16 Theming support

theme/theme.nix: fix formatting

supported-themes.nix: formatting

clean up base16-colors.nix

theme: fix plugin setup, change base16 flake input

* theme/theme.nix: fix formatting

* types/theme.nix: add check regex matching

types/theme.nix: fixed regex matching

* lib/types: rename custom.nix to types.nix, mov theme.nix into types.nix

* plugins/theme: apply requested changes

types/types.nix: remove unneeded inherit

theme/theme.nix: remove commented inherit

* theme/theme.nix: fix up base16 helper func

Co-authored-by: diniamo <55629891+diniamo@users.noreply.github.com>

* theme/theme.nix: move listToAttrs inheriting, fix base16-colors declaration

* theme/theme.nix: add documentation to vim.theme.name

* release-notes/rl-0.7.md: add changelog entry for base16

* theme/theme.nix: fix documentation rendering

---------

Co-authored-by: diniamo <55629891+diniamo@users.noreply.github.com>

modules/plugins/theme/supported-themes.nix

@@ -4,7 +4,14 @@
 }: let
   inherit (lib.strings) optionalString;
   inherit (lib.trivial) boolToString warnIf;
+  inherit (lib.nvim.lua) toLuaObject;
 in {
+  base16 = {
+    setup = {base16-colors, ...}: ''
+      -- Base16 theme
+      require('base16-colorscheme').setup(${toLuaObject base16-colors})
+    '';
+  };
   onedark = {
     setup = {style ? "dark", ...}: ''
       -- OneDark theme
@@ -20,6 +27,7 @@ in {
     setup = {
       style ? "night",
       transparent,
+      ...
     }: ''
       require('tokyonight').setup {
         transparent = ${boolToString transparent};
@@ -42,6 +50,7 @@ in {
     setup = {
       style ? "mocha",
       transparent ? false,
+      ...
     }: ''
       -- Catppuccin theme
       require('catppuccin').setup {

modules/plugins/theme/theme.nix

@@ -4,32 +4,51 @@
   ...
 }: let
   inherit (lib.options) mkOption;
-  inherit (lib.attrsets) attrNames;
+  inherit (lib.attrsets) attrNames listToAttrs;
+  inherit (lib.strings) hasPrefix;
   inherit (lib.types) bool lines enum;
   inherit (lib.modules) mkIf;
   inherit (lib.nvim.dag) entryBefore;
+  inherit (lib.nvim.types) hexColor;
 
   cfg = config.vim.theme;
   supportedThemes = import ./supported-themes.nix {
     inherit lib config;
   };
+
+  numbers = ["0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "A" "B" "C" "D" "E" "F"];
+  base16Options = listToAttrs (map (n: {
+      name = "base0${n}";
+      value = mkOption {
+        description = "The base0${n} color to use";
+        type = hexColor;
+        apply = v:
+          if hasPrefix "#" v
+          then v
+          else "#${v}";
+      };
+    })
+    numbers);
 in {
   options.vim.theme = {
     enable = mkOption {
       type = bool;
       description = "Enable theming";
     };
-
     name = mkOption {
       type = enum (attrNames supportedThemes);
-      description = "Supported themes can be found in `supportedThemes.nix`";
+      description = ''
+        Supported themes can be found in {file}`supportedThemes.nix`.
+        Setting the theme to "base16" enables base16 theming and
+        requires all of the colors in {option}`vim.theme.base16-colors` to be set.
+      '';
     };
+    base16-colors = base16Options;
 
     style = mkOption {
       type = enum supportedThemes.${cfg.name}.styles;
       description = "Specific style for theme if it supports it";
     };
-
     transparent = mkOption {
       type = bool;
       default = false;
@@ -47,7 +66,7 @@ in {
       startPlugins = [cfg.name];
       luaConfigRC.theme = entryBefore ["pluginConfigs"] ''
         ${cfg.extraConfig}
-        ${supportedThemes.${cfg.name}.setup {inherit (cfg) style transparent;}}
+        ${supportedThemes.${cfg.name}.setup {inherit (cfg) style transparent base16-colors;}}
       '';
     };
   };