flocon/home/base/programs/wezterm.nix

{ ... }:

{
  programs.wezterm = {
    enable = true;
    extraConfig = ''
      local w = require('wezterm')

      -- if you are *NOT* lazy-loading smart-splits.nvim (recommended)
      local function is_vim(pane)
        -- this is set by the plugin, and unset on ExitPre in Neovim
        return pane:get_user_vars().IS_NVIM == 'true'
      end

      -- if you *ARE* lazy-loading smart-splits.nvim (not recommended)
      -- you have to use this instead, but note that this will not work
      -- in all cases (e.g. over an SSH connection). Also note that
      -- `pane:get_foreground_process_name()` can have high and highly variable
      -- latency, so the other implementation of `is_vim()` will be more
      -- performant as well.
      local function is_vim(pane)
        -- This gsub is equivalent to POSIX basename(3)
        -- Given "/foo/bar" returns "bar"
        -- Given "c:\\foo\\bar" returns "bar"
        local process_name = string.gsub(pane:get_foreground_process_name(), '(.*[/\\])(.*)', '%2')
        return process_name == 'nvim' or process_name == 'vim'
      end

      local direction_keys = {
        h = 'Left',
        j = 'Down',
        k = 'Up',
        l = 'Right',
      }

      local function split_nav(resize_or_move, key)
        return {
          key = key,
          mods = resize_or_move == 'resize' and 'META' or 'CTRL',
          action = w.action_callback(function(win, pane)
            if is_vim(pane) then
              -- pass the keys through to vim/nvim
              win:perform_action({
                SendKey = { key = key, mods = resize_or_move == 'resize' and 'META' or 'CTRL' },
              }, pane)
            else
              if resize_or_move == 'resize' then
                win:perform_action({ AdjustPaneSize = { direction_keys[key], 3 } }, pane)
              else
                win:perform_action({ ActivatePaneDirection = direction_keys[key] }, pane)
              end
            end
          end),
        }
      end

      return {
          front_end = "WebGpu",
          hide_tab_bar_if_only_one_tab = true,
          show_new_tab_button_in_tab_bar = false,
          enable_wayland = false,
          harfbuzz_features = { "ss01", "ss03" },

          leader = { key = " ", mods = "CTRL", timeout_milliseconds = 1000 },

          keys = {
              {
                mods = "LEADER",
                key = "-",
                action = wezterm.action.SplitVertical { domain = "CurrentPaneDomain" }
              },
              {
                mods = "LEADER",
                key = "=",
                action = wezterm.action.SplitHorizontal { domain = "CurrentPaneDomain" }
              },
            -- move between split panes
            split_nav('move', 'h'),
            split_nav('move', 'j'),
            split_nav('move', 'k'),
            split_nav('move', 'l'),
            -- resize panes
            split_nav('resize', 'h'),
            split_nav('resize', 'j'),
            split_nav('resize', 'k'),
            split_nav('resize', 'l'),
          },
      }
    '';
  };
}