neovim-flake/modules/ui/borders/borders.nix

{
  config,
  lib,
  ...
}: let
  inherit (lib) mkOption mkEnableOption types;

  cfg = config.vim.ui.borders;

  defaultStyles = ["none" "single" "double" "rounded"];
in {
  options.vim.ui.borders = {
    enable = mkEnableOption "visible borders for most windows";

    globalStyle = mkOption {
      type = types.enum defaultStyles;
      default = "rounded";
      description = ''
        global border style to use
      '';
    };

    # TODO: make per-plugin borders configurable
    plugins = let
      mkPluginStyleOption = name: {
        enable = mkEnableOption "whether to enable borders for the ${name} plugin" // {default = cfg.enable;};

        style = mkOption {
          type = types.enum (defaultStyles ++ lib.optionals (name != "which-key") ["shadow"]);
          default = cfg.globalStyle;
          description = "border style to use for the ${name} plugin";
        };
      };
    in {
      # despite not having it listed in example configuration, which-key does support the rounded type
      # additionall, it supports a "shadow" type that is similar to none but is of higher contrast
      which-key = mkPluginStyleOption "which-key";
      lspsaga = mkPluginStyleOption "lspsaga";
      nvim-cmp = mkPluginStyleOption "nvim-cmp";
      lsp-signature = mkPluginStyleOption "lsp-signature";
    };
  };
}