1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE DeriveTraversable #-}
{-# LANGUAGE DeriveFoldable #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE TemplateHaskell #-}
--------------------------------------------------------------------------------
-- | Common data types for Xanthous
--------------------------------------------------------------------------------
module Xanthous.Data
( Position(..)
, x
, y
, Positioned(..)
, position
, positioned
, loc
-- *
, Direction(..)
, opposite
, move
, asPosition
-- *
, EntityChar(..)
) 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), raw)
import Graphics.Vty.Attributes
import qualified Graphics.Vty.Image as Vty
import Data.Aeson
--------------------------------------------------------------------------------
import Xanthous.Util (EqEqProp(..), EqProp)
import Xanthous.Orphans ()
import Xanthous.Entities (Draw(..))
--------------------------------------------------------------------------------
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)
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
--------------------------------------------------------------------------------
data Direction where
Up :: Direction
Down :: Direction
Left :: Direction
Right :: Direction
UpLeft :: Direction
UpRight :: Direction
DownLeft :: Direction
DownRight :: 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
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
asPosition :: Direction -> Position
asPosition dir = move dir mempty
--------------------------------------------------------------------------------
data EntityChar = EntityChar
{ _char :: Char
, _style :: Attr
}
deriving stock (Show, Eq, Generic)
deriving anyclass (NFData)
instance FromJSON EntityChar where
parseJSON (String (chr :< Empty)) = pure $ EntityChar chr defAttr
parseJSON (Object o) = do
(EntityChar _char _) <- o .: "char"
_style <- o .:? "style" >>= \case
Just styleO -> do
let attrStyle = Default -- TODO
attrURL = Default
attrForeColor <- styleO .:? "foreground" .!= Default
attrBackColor <- styleO .:? "background" .!= Default
pure Attr {..}
Nothing -> pure defAttr
pure EntityChar {..}
parseJSON _ = fail "Invalid type, expected string or object"
instance Draw EntityChar where
draw EntityChar{..} = raw $ Vty.string _style [_char]
|
