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{-# LANGUAGE RoleAnnotations #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE DeriveTraversable #-}
{-# LANGUAGE DeriveFoldable #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE TemplateHaskell #-}
--------------------------------------------------------------------------------
-- | Common data types for Xanthous
--------------------------------------------------------------------------------
module Xanthous.Data
( Position(..)
, x
, y
, Positioned(..)
, _Positioned
, position
, positioned
, loc
, _Position
, positionFromPair
-- *
, Dimensions'(..)
, Dimensions
, HasWidth(..)
, HasHeight(..)
-- *
, Direction(..)
, opposite
, move
, asPosition
-- *
, Neighbors(..)
, edges
, neighborDirections
, neighborPositions
) where
--------------------------------------------------------------------------------
import Xanthous.Prelude hiding (Left, Down, Right)
import Test.QuickCheck (Arbitrary, CoArbitrary, Function)
import Test.QuickCheck.Arbitrary.Generic
import Data.Group
import Brick (Location(Location), Edges(..))
--------------------------------------------------------------------------------
import Xanthous.Util (EqEqProp(..), EqProp)
import Xanthous.Orphans ()
--------------------------------------------------------------------------------
data Position where
Position :: { _x :: Int
, _y :: Int
} -> Position
deriving stock (Show, Eq, Generic, Ord)
deriving anyclass (Hashable, CoArbitrary, Function)
deriving EqProp via EqEqProp Position
makeLenses ''Position
instance Arbitrary Position where
arbitrary = genericArbitrary
shrink = genericShrink
instance Semigroup Position where
(Position x₁ y₁) <> (Position x₂ y₂) = Position (x₁ + x₂) (y₁ + y₂)
instance Monoid Position where
mempty = Position 0 0
instance Group Position where
invert (Position px py) = Position (-px) (-py)
data Positioned a where
Positioned :: Position -> a -> Positioned a
deriving stock (Show, Eq, Ord, Functor, Foldable, Traversable, Generic)
deriving anyclass (CoArbitrary, Function)
type role Positioned representational
_Positioned :: Iso (Position, a) (Position, b) (Positioned a) (Positioned b)
_Positioned = iso hither yon
where
hither (pos, a) = Positioned pos a
yon (Positioned pos b) = (pos, b)
instance Arbitrary a => Arbitrary (Positioned a) where
arbitrary = Positioned <$> arbitrary <*> arbitrary
position :: Lens' (Positioned a) Position
position = lens
(\(Positioned pos _) -> pos)
(\(Positioned _ a) pos -> Positioned pos a)
positioned :: Lens (Positioned a) (Positioned b) a b
positioned = lens
(\(Positioned _ x') -> x')
(\(Positioned pos _) x' -> Positioned pos x')
loc :: Iso' Position Location
loc = iso hither yon
where
hither (Position px py) = Location (px, py)
yon (Location (lx, ly)) = Position lx ly
_Position :: Iso' Position (Int, Int)
_Position = iso hither yon
where
hither (Position px py) = (px, py)
yon (lx, ly) = Position lx ly
positionFromPair :: (Integral i, Integral j) => (i, j) -> Position
positionFromPair (i, j) = Position (fromIntegral i) (fromIntegral j)
--------------------------------------------------------------------------------
data Dimensions' a = Dimensions
{ _width :: a
, _height :: a
}
deriving stock (Show, Eq, Functor, Generic)
deriving anyclass (CoArbitrary, Function)
makeFieldsNoPrefix ''Dimensions'
instance Arbitrary a => Arbitrary (Dimensions' a) where
arbitrary = Dimensions <$> arbitrary <*> arbitrary
type Dimensions = Dimensions' Word
--------------------------------------------------------------------------------
data Direction where
Up :: Direction
Down :: Direction
Left :: Direction
Right :: Direction
UpLeft :: Direction
UpRight :: Direction
DownLeft :: Direction
DownRight :: Direction
Here :: Direction
deriving stock (Show, Eq, Generic)
instance Arbitrary Direction where
arbitrary = genericArbitrary
shrink = genericShrink
opposite :: Direction -> Direction
opposite Up = Down
opposite Down = Up
opposite Left = Right
opposite Right = Left
opposite UpLeft = DownRight
opposite UpRight = DownLeft
opposite DownLeft = UpRight
opposite DownRight = UpLeft
opposite Here = Here
move :: Direction -> Position -> Position
move Up = y -~ 1
move Down = y +~ 1
move Left = x -~ 1
move Right = x +~ 1
move UpLeft = move Up . move Left
move UpRight = move Up . move Right
move DownLeft = move Down . move Left
move DownRight = move Down . move Right
move Here = id
asPosition :: Direction -> Position
asPosition dir = move dir mempty
--------------------------------------------------------------------------------
data Neighbors a = Neighbors
{ _topLeft
, _top
, _topRight
, _left
, _right
, _bottomLeft
, _bottom
, _bottomRight :: a
}
deriving stock (Show, Eq, Ord, Functor, Foldable, Traversable, Generic)
deriving anyclass (NFData)
makeLenses ''Neighbors
instance Applicative Neighbors where
pure α = Neighbors
{ _topLeft = α
, _top = α
, _topRight = α
, _left = α
, _right = α
, _bottomLeft = α
, _bottom = α
, _bottomRight = α
}
nf <*> nx = Neighbors
{ _topLeft = nf ^. topLeft $ nx ^. topLeft
, _top = nf ^. top $ nx ^. top
, _topRight = nf ^. topRight $ nx ^. topRight
, _left = nf ^. left $ nx ^. left
, _right = nf ^. right $ nx ^. right
, _bottomLeft = nf ^. bottomLeft $ nx ^. bottomLeft
, _bottom = nf ^. bottom $ nx ^. bottom
, _bottomRight = nf ^. bottomRight $ nx ^. bottomRight
}
edges :: Neighbors a -> Edges a
edges neighs = Edges
{ eTop = neighs ^. top
, eBottom = neighs ^. bottom
, eLeft = neighs ^. left
, eRight = neighs ^. right
}
neighborDirections :: Neighbors Direction
neighborDirections = Neighbors
{ _topLeft = UpLeft
, _top = Up
, _topRight = UpRight
, _left = Left
, _right = Right
, _bottomLeft = DownLeft
, _bottom = Down
, _bottomRight = DownRight
}
neighborPositions :: Position -> Neighbors Position
neighborPositions pos = (`move` pos) <$> neighborDirections
|
