@type focus_event() :: :focus_in | :focus_out

@type modifier() :: :shift | :alt | :ctrl | :meta

@type mouse_action() :: :press | :release | :move | :drag

@type mouse_button() ::
  :left | :middle | :right | :wheel_up | :wheel_down | :release | :none

@type mouse_event() :: {mouse_button(), mouse_action(), integer(), integer()}

@type mouse_mode() ::
  :basic
  | :normal
  | :highlight
  | :cell
  | :button
  | :all
  | :any
  | :focus
  | :utf8
  | :sgr
  | :urxvt
  | :sgr_pixels

@type mouse_state() :: %{
  enabled: boolean(),
  mode: mouse_mode(),
  button_state: mouse_button(),
  modifiers: MapSet.t(modifier()),
  position: {integer(), integer()},
  last_position: {integer(), integer()},
  drag_state: :none | :dragging | :drag_end
}