content: {-
  waymonad A wayland compositor in the spirit of xmonad
  Copyright (C) 2018  Markus Ongyerth
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  
  Reach us at https://github.com/ongy/waymonad
  -}
  {-# LANGUAGE OverloadedStrings #-}
  {-# LANGUAGE TypeSynonymInstances #-}
  {-# LANGUAGE FlexibleInstances #-}
  {-# LANGUAGE MultiParamTypeClasses #-}
  {-# LANGUAGE LambdaCase #-}
  module Waymonad.Layout.Vertical
  where
  
  import Data.Set (Set)
  
  import Graphics.Wayland.WlRoots.Box (WlrBox(..))
  
  import Waymonad.ViewSet
  import Waymonad.Types (SSDPrio (NoSSD))
  import Waymonad.Types.Core (Seat, View)
  
  data Vertical = Vertical
  
  instance LayoutClass Vertical where
      description _ = "Vertical"
      handleMessage _ _ _ = Nothing
      broadcastMessage _ _  = Nothing
  
  instance ListLike vs ws => GenericLayoutClass Vertical vs ws where
      pureLayout _ vs ws box = layoutVertical box (_asList vs ws)
  
  layoutVertical :: WlrBox -> [(Set Seat, View)] -> [(View, SSDPrio, WlrBox)]
  layoutVertical box xs =
      let slaves = zip xs [0 ..]
          num = length xs
          height = boxHeight box `div` num
          ibox i = box
              { boxHeight = height
              , boxY = boxY box + i * height
              }
      in map (\((s, v), i) -> (v, NoSSD s, ibox i)) slaves
  