nix-infra/common/home_manager/helix.nix

{ pkgs, lib, ... }:
{
  # Set editor
  environment.variables.EDITOR = "hx";

  home-manager.users.agatha = {
    # Formatters/Language Servers that Helix uses
    home.packages = with pkgs; [ nixfmt-rfc-style ];

    programs = {
      helix = {
        enable = true;
        package = pkgs.helix;
        languages = {
          language = [
            {
              name = "nix";
              auto-format = true;
              formatter = {
                command = "nixfmt";
              };
            }
          ];
        };
        settings = {
          theme = lib.mkDefault "paramount-dark";
          editor = {
            middle-click-paste = false;
            scroll-lines = 4;
            shell = [
              "fish"
              "-c"
            ];
            bufferline = "multiple";

            statusline = {
              left = [
                "mode"
                "spinner"
                "file-name"
              ];
              right = [
                "workspace-diagnostics"
                "position"
                "position-percentage"
                "spacer"
                "file-encoding"
                "file-line-ending"
                "file-type"
              ];
              separator = " ";
            };

            cursor-shape = {
              insert = "bar";
            };

            whitespace.render = {
              tab = "all";
              space = "all";
              newline = "none";
            };

            whitespace.characters = {
              tab = "·";
              tabpad = "·";
            };

            indent-guides = {
              render = true;
              character = "┊";
              skip-levels = 1;
            };
          };

          keys = {
            insert = {
              "C-left" = [
                "move_prev_word_start"
                "collapse_selection"
              ];
              "C-right" = [
                "move_next_word_start"
                "collapse_selection"
              ];
            };

            normal = {
              "C-left" = [
                "move_prev_word_start"
                "collapse_selection"
              ];
              "C-right" = [
                "move_next_word_start"
                "collapse_selection"
              ];
              "A-d" = "delete_selection";
              "d" = "delete_selection_noyank";
            };
          };
        };

        themes = {
          paramount-dark =
            let
              medium_gray = "#767676";
              lighter_black = "#4E4E4E";
              lighter_gray = "#C6C6C6";
              light_red = "#E32791";
              orange = "#D75F5F";
              light_green = "#5FD7A7";
              dark_purple = "#af5fd7";
              light_purple = "#a790d5";
              dark_yellow = "#A89C14";
            in
            {
              "ui.background" = {
                bg = "black";
              };
              "ui.gutter" = {
                bg = "black";
              };
              "ui.menu.selected" = {
                fg = lighter_gray;
                bg = light_purple;
              };
              "comment" = {
                fg = lighter_black;
                modifiers = [ "italic" ];
              };
              "constant" = light_purple;
              "string" = light_purple;
              "variable" = lighter_gray;
              "function" = lighter_gray;
              "keyword.function" = lighter_gray;
              "keyword.control" = medium_gray;
              "keyword.control.import" = medium_gray;
              "operator" = {
                fg = lighter_gray;
                modifiers = [ "bold" ];
              };
              "function.special" = medium_gray;
              "type" = lighter_gray;
              "tag" = {
                fg = medium_gray;
                modifiers = [ "italic" ];
              };
              "punctuation" = {
                fg = medium_gray;
              };
              "ui.linenr" = medium_gray;
              "ui.linenr.selected" = {
                fg = light_purple;
              };
              "ui.window" = medium_gray;
              "ui.text" = lighter_gray;
              "ui.text.focus" = light_purple;
              "ui.virtual.whitespace" = lighter_black;
              "string.special.url" = {
                fg = lighter_gray;
                underline = {
                  color = lighter_gray;
                  style = "line";
                };
                modifiers = [ "underlined" ];
              };
              "markup.link" = {
                fg = lighter_gray;
                underline = {
                  color = lighter_gray;
                  style = "line";
                };
                modifiers = [ "underlined" ];
              };
              "diagnostic.error" = {
                underline = {
                  color = light_red;
                  style = "curl";
                };
              };
              "error" = light_red;
              "diagnostic.hint" = {
                underline = {
                  color = lighter_gray;
                  style = "curl";
                };
              };
              "hint" = lighter_gray;
              "ui.selection" = {
                fg = lighter_gray;
                bg = light_purple;
              };
              "ui.selection.primary" = {
                fg = lighter_gray;
                bg = light_purple;
              };
              "warning" = orange;
              "diagnostic.warning" = {
                underline = {
                  color = orange;
                  style = "curl";
                };
              };
              "diff.plus" = light_green;
              "diff.minus" = light_red;
              "diff.delta" = dark_yellow;
              "ui.cursor" = {
                bg = lighter_gray;
              };
              "ui.cursor.insert" = {
                bg = light_purple;
              };
              "ui.cursor.select" = {
                bg = dark_purple;
              };
              "ui.cursor.match" = {
                fg = lighter_gray;
                bg = medium_gray;
              };
              "namespace" = medium_gray;
            };
          paramount-light =
            let
              medium_gray = "#767676";
              actual_white = "#FFFFFF";
              light_black = "#262626";
              dark_red = "#C30771";
              orange = "#D75F5F";
              dark_green = "#10A778";
              dark_purple = "#af5fd7";
              dark_yellow = "#A89C14";
            in
            {
              inherits = "spacebones_light";

              "ui.background" = {
                bg = actual_white;
              };
              "ui.gutter" = {
                bg = actual_white;
              };
              "ui.menu.selected" = {
                fg = light_black;
                bg = dark_purple;
              };
              "comment" = {
                fg = "dark_gray";
                modifiers = [ "italic" ];
              };
              "constant" = dark_purple;
              "string" = dark_purple;
              "variable" = light_black;
              "variable.parameter" = light_black;
              "function" = light_black;
              "keyword" = medium_gray;
              "keyword.function" = light_black;
              "keyword.control" = medium_gray;
              "keyword.control.import" = medium_gray;
              "operator" = {
                fg = light_black;
                modifiers = [ "bold" ];
              };
              "function.special" = medium_gray;
              "function.macro" = medium_gray;
              "type" = light_black;
              "type.builtin" = light_black;
              "tag" = {
                fg = medium_gray;
                modifiers = [ "italic" ];
              };
              "punctuation" = {
                fg = medium_gray;
              };
              "ui.linenr" = medium_gray;
              "ui.linenr.selected" = {
                fg = dark_purple;
              };
              "string.special.url" = {
                fg = light_black;
                underline = {
                  color = light_black;
                  style = "line";
                };
                modifiers = [ "underlined" ];
              };
              "markup.link" = {
                fg = light_black;
                underline = {
                  color = light_black;
                  style = "line";
                };
                modifiers = [ "underlined" ];
              };
              "diagnostic.error" = {
                underline = {
                  color = dark_red;
                  style = "curl";
                };
              };
              "error" = dark_red;
              "diagnostic.hint" = {
                underline = {
                  color = light_black;
                  style = "curl";
                };
              };
              "hint" = light_black;
              "ui.selection" = {
                fg = light_black;
                bg = dark_purple;
              };
              "ui.selection.primary" = {
                fg = light_black;
                bg = dark_purple;
              };
              "warning" = orange;
              "diagnostic.warning" = {
                underline = {
                  color = orange;
                  style = "curl";
                };
              };
              "diff.plus" = dark_green;
              "diff.minus" = dark_red;
              "diff.delta" = dark_yellow;
              "ui.cursor" = {
                bg = light_black;
              };
              "ui.cursor.insert" = {
                bg = dark_purple;
              };
              "ui.cursor.select" = {
                bg = dark_purple;
              };
              "ui.cursor.match" = {
                fg = light_black;
                bg = medium_gray;
              };
              "namespace" = medium_gray;
              "special" = medium_gray;
            };
        };
      };
    };
  };
}