module Text.Layout.Table.Primitives.LenSpec.Internal
    ( LenSpec (..)
    , expand
    , fixed
    , expandUntil
    , fixedUntil
    ) where

import Data.Default.Class

-- | Determines how long a column will be.
data LenSpec = Expand | Fixed Int | ExpandUntil Int | FixedUntil Int

instance Default LenSpec where
    def = expand

-- | Allows columns to use as much space as needed.
expand :: LenSpec
expand = Expand

-- | Fixes column length to a specific width.
fixed :: Int -> LenSpec
fixed = Fixed

-- | The column will expand as long as it is smaller as the given width.
expandUntil :: Int -> LenSpec
expandUntil = ExpandUntil

-- | The column will be at least as wide as the given width.
fixedUntil :: Int -> LenSpec
fixedUntil = FixedUntil