dotfiles/hm/vim/decoration.nix

{ pkgs, lib, config, ... }:
{
  config = {
    programs = {
      # https://www.reddit.com/r/neovim/comments/mbj8m5/how_to_setup_ctrlshiftkey_mappings_in_neovim_and/
      alacritty.settings.key_bindings = [
        { key = "H"; mods = "Control|Shift"; chars = "\\x1b[72;5u"; }
        { key = "L"; mods = "Control|Shift"; chars = "\\x1b[76;5u"; }
      ] ++ (map
        (n: { key = "Key${builtins.toString n}"; mods = "Control"; chars = "\\x1b[${builtins.toString (48+n)};5u"; })
        (lib.lists.range 0 9));
      # Ctrl+<number> doesn't get interpreted, but Ctrl+Shift+<number> does, so let's use that
      nixvim = {
        autoCmd = [
          # Turn off relativenumber only for insert mode
          { event = "InsertEnter"; pattern = "*"; command = "set norelativenumber"; }
          { event = "InsertLeave"; pattern = "*"; command = "set relativenumber"; }
        ];
        extraPlugins = with pkgs.vimPlugins; [
          nvim-scrollview # Scroll bar
        ];
        keymaps =
          let
            options = { silent = true; };
          in
          [
            # barbar
            { key = "gb"; action = "<Cmd>BufferPick<CR>"; inherit options; }
            { key = "<C-H>"; action = "<Cmd>BufferPrevious<CR>"; inherit options; }
            { key = "<C-L>"; action = "<Cmd>BufferNext<CR>"; inherit options; }
            { key = "<C-S-H>"; action = "<Cmd>BufferMovePrevious<CR>"; inherit options; }
            { key = "<C-S-L>"; action = "<Cmd>BufferMoveNext<CR>"; inherit options; }
            { key = "<C-0>"; action = "<Cmd>BufferLast<CR>"; inherit options; }
          ] ++ (map
            (n: { key = "<C-${builtins.toString n}>"; action = "<Cmd>BufferGoto ${builtins.toString n}<CR>"; inherit options; })
            (lib.lists.range 1 9));
        options = {
          showmode = false;
          number = true;
          relativenumber = true;
          title = true;
        };
        plugins = {
          # Tabline
          barbar.enable = true;
          # TODO Reload make it use the preset colorscheme
          # Status line
          lualine = with config.lib.stylix.colors.withHashtag; let
            normal = { fg = base05; bg = base01; };
            inverted = { fg = base00; bg = base03; };
            normal_ina = { fg = base02; bg = base01; };
            inverted_ina = { fg = base00; bg = base02; };
          in
          rec {
            enable = true;
            inactiveSections = sections;
            sections = {
              lualine_a = [{
                name = ''string.format('%d', vim.fn.line('$'))'';
              }];
              lualine_b = [
                "mode"
              ];
              lualine_c = [{
                name = "filename";
                color = {
                  __raw = ''
                    function(section)
                      return { fg = vim.bo.modified and '${base08}' or '${normal.fg}' }
                    end
                  '';
                };
                extraConfig = {
                  path = 1; # Relative path
                  symbols = {
                    modified = "●";
                    newfile = "󰻭";
                    readonly = "󰏯";
                    unnamed = "󱀶";
                  };
                };
              }
                "location"];
              lualine_x = [{
                name = ''(next(vim.lsp.buf_get_clients()) == nil) and "󰒲 " or ""'';
                extraConfig.separator = { left = ""; right = ""; };
              }] ++ (lib.mapAttrsToList
                (diag_name: diag_color: {
                  name = "diagnostics";
                  extraConfig = {
                    color.bg = diag_color;
                    colored = false;
                    separator = { left = ""; right = ""; };
                    sections = [ diag_name ];
                  };
                })
                {
                  error = base08;
                  warn = base0A;
                  hint = base0C;
                  info = base0B;
                });
              lualine_y = [{
                name = "diff";
                extraConfig = {
                  diff_color = {
                    added.fg = base0B;
                    modified.fg = base0A;
                    removed.fg = base08;
                  };
                  symbols = {
                    added = " ";
                    modified = " ";
                    removed = " ";
                  };
                };
              }
                "branch"];
              lualine_z = [
                "filetype"
                "fileformat"
                "encoding"
              ];
            };
            theme = (lib.mapAttrs
              (mode_name: mode_color: {
                a = inverted;
                b = inverted // { bg = mode_color; gui = "bold"; };
                c = normal;
                x = inverted;
                y = normal;
                z = inverted // { bg = mode_color; };
              })
              {
                normal = base0D;
                insert = base0B;
                visual = base0F;
                replace = base08;
                command = base0E;
              }) // {
              inactive = {
                a = inverted_ina;
                b = normal_ina // { bg = base00; gui = "bold"; };
                c = normal_ina;
                x = inverted_ina;
                y = normal_ina;
                z = normal_ina // { bg = base00; };
              };
            };
          };
          # Show context on top if scrolled out
          treesitter-context = {
            enable = true;
            maxLines = 5;
          };
        };
      };
    };
  };
}