.wezterm.lua

-- Press Control+Shift+L to see logs. Use wezterm.log_info() for outputs.

-- imports
local wezterm = require 'wezterm'
local gui = wezterm.gui

-- utility functions
function is_dark()
  -- wezterm.gui is not always available, depending on what
  -- environment wezterm is operating in. Just return true
  -- if it's not defined.
  if gui then
    -- Some systems report appearance like "Dark High Contrast"
    -- so let's just look for the string "Dark" and if we find
    -- it assume appearance is dark.
    return gui.get_appearance():find("Dark")
  end
  return true
end

function merge_tables(defaults, overrides)
  for k,v in pairs(overrides) do defaults[k] = v end
  return defaults
end

-- globals
local action = wezterm.action
local config = wezterm.config_builder()

-- reusable key shortcuts
local tmux_window_new = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = 'c' },
})
local tmux_window_next = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = 'n' },
})
local tmux_window_prev = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = 'p' },
})
local tmux_window_kill = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '&' },
})
local tmux_pane_new_up = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '-' },
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '{' },
})
local tmux_pane_new_down = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '-' },
})
local tmux_pane_new_right = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '|' },
})
local tmux_pane_new_left = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '|' },
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = '{' },
})
local tmux_pane_kill = action.Multiple({
  action.SendKey { key = 'a', mods = 'CTRL'},
  action.SendKey { key = 'x' },
})

-- config defaults
local default_dark_theme = 'nord'
local default_light_theme = 'Atelier Cave Light (base16)'
-- Other choices: 'Alabaster', '3024 Day', 'Ashes (light) (terminal.sexy)'
local defaults = {
  window_close_confirmation = 'NeverPrompt',
  window_background_opacity = 0.95,
  color_scheme = is_dark() and default_dark_theme or default_light_theme,
  font = wezterm.font('DejaVu Sans Mono'),
  font_size = 9,
  harfbuzz_features = { 'calt=0', 'clig=0', 'liga=0' },
  window_decorations = 'RESIZE|INTEGRATED_BUTTONS',
  window_frame = {
    font = wezterm.font({ family = 'DejaVu Sans', weight = 'Bold' }),
    font_size = 12,
  },
  hide_mouse_cursor_when_typing = false,
  hide_tab_bar_if_only_one_tab = false,
  window_padding = {
    left = 0,
    right = 0,
    top = 0,
    bottom = 0,
  },
  initial_cols = math.floor(80 * 1.5),
  initial_rows = math.floor(24 * 1.5),


  keys = {
    -- tmux
    { key = 't', mods = 'CTRL|SHIFT', action = tmux_window_new },
    { key = 'n', mods = 'CTRL|SHIFT', action = tmux_window_next },
    { key = 'p', mods = 'CTRL|SHIFT', action = tmux_window_prev },
    { key = 'w', mods = 'CTRL|SHIFT', action = tmux_window_kill },
    { key = 'UpArrow', mods = 'CTRL|SHIFT', action = tmux_pane_new_up },
    { key = 'DownArrow', mods = 'CTRL|SHIFT', action = tmux_pane_new_down },
    { key = 'LeftArrow', mods = 'CTRL|SHIFT', action = tmux_pane_new_left },
    { key = 'RightArrow', mods = 'CTRL|SHIFT', action = tmux_pane_new_right },

    { key = 'w', mods = 'CTRL|SHIFT|ALT', action = tmux_pane_kill },
    -- wezterm
    { key = 'n', mods = 'CTRL|ALT', action = action.SpawnWindow },
  },
}

-- platform overrides
local platform = {
  ["x86_64-pc-windows-msvc"] = {},
  ["x86_64-apple-darwin"] = {},
  ["aarch64-apple-darwin"] = {
    font = wezterm.font('DejaVu Sans Mono for Powerline'),
    font_size = 12.0,
    macos_window_background_blur = 10,
  },
  ["x86_64-unknown-linux-gnu"] = {
    window_background_opacity = 0.97,
  },
}

-- hostname overrides
local hostname = {
  surface = {
   font_size = 7.5
  },
  discordia = {
    hide_tab_bar_if_only_one_tab = true,
  },
}

-- display overrides
local display = {
  ["Built-in Retina Display"] = {
    -- macOS "more space"
    ["3600x2338"] = {
      font_size = 13
    },
    -- macOS "default"
    ["3024x1964"] = {
      font_size = 11
    }
  }
}

-- merging default and overrides
local merged = merge_tables(defaults, platform[wezterm.target_triple])
merged = merge_tables(merged, hostname[wezterm.hostname()] or {})
config = merge_tables(config, merged)

-- event handlers
wezterm.on('window-config-reloaded', function(window, pane)
  -- Information about the current screens can be accessed only 
  -- inside event threads.
  local current_overrides = window:get_config_overrides() or {}
  local active_display = wezterm.gui.screens()['active']
  local overrides = display[active_display['name']] or {}
  local resolution = active_display['width'] .. 'x' .. active_display['height']

  overrides = overrides[resolution] or {}
  for k,v in pairs(overrides) do 
    if not current_overrides[k] then
      current_overrides[k] = v
    else
      local cur_val = current_overrides[k]
      if cur_val ~= v then
        current_overrides[k] = v
      end
    end
    window:set_config_overrides(current_overrides)
  end

end)

return config