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
|
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
--------------------------------------------------------------------------------
module Keyboard where
--------------------------------------------------------------------------------
import Utils
import Data.Hashable (Hashable)
import GHC.Generics (Generic)
import qualified Data.List as List
import qualified Data.HashMap.Strict as HM
--------------------------------------------------------------------------------
newtype Keyboard = Keyboard [[Char]]
deriving (Eq)
instance Show Keyboard where
show (Keyboard xxs) =
xxs |> fmap printRow |> List.intercalate "\n"
where
printRow :: [Char] -> String
printRow xs =
xs |> fmap (\x -> '[':x:']':"") |> List.intercalate ""
data Coord = Coord
{ row :: Int
, col :: Int
} deriving (Eq, Show, Generic)
instance Hashable Coord
-- | List of characters to their QWERTY coordinatees.
coords :: [(Char, Coord)]
coords = [ ('0', Coord { row = 0, col = 0 })
, ('1', Coord { row = 0, col = 1 })
, ('2', Coord { row = 0, col = 2 })
, ('3', Coord { row = 0, col = 3 })
, ('4', Coord { row = 0, col = 4 })
, ('5', Coord { row = 0, col = 5 })
, ('6', Coord { row = 0, col = 6 })
, ('7', Coord { row = 0, col = 7 })
, ('8', Coord { row = 0, col = 8 })
, ('9', Coord { row = 0, col = 9 })
-- second row
, ('Q', Coord { row = 1, col = 0 })
, ('W', Coord { row = 1, col = 1 })
, ('E', Coord { row = 1, col = 2 })
, ('R', Coord { row = 1, col = 3 })
, ('T', Coord { row = 1, col = 4 })
, ('Y', Coord { row = 1, col = 5 })
, ('U', Coord { row = 1, col = 6 })
, ('I', Coord { row = 1, col = 7 })
, ('O', Coord { row = 1, col = 8 })
, ('P', Coord { row = 1, col = 9 })
-- third row
, ('A', Coord { row = 2, col = 0 })
, ('S', Coord { row = 2, col = 1 })
, ('D', Coord { row = 2, col = 2 })
, ('F', Coord { row = 2, col = 3 })
, ('G', Coord { row = 2, col = 4 })
, ('H', Coord { row = 2, col = 5 })
, ('J', Coord { row = 2, col = 6 })
, ('K', Coord { row = 2, col = 7 })
, ('L', Coord { row = 2, col = 8 })
, (';', Coord { row = 2, col = 9 })
-- fourth row
, ('Z', Coord { row = 3, col = 0 })
, ('X', Coord { row = 3, col = 1 })
, ('C', Coord { row = 3, col = 2 })
, ('V', Coord { row = 3, col = 3 })
, ('B', Coord { row = 3, col = 4 })
, ('N', Coord { row = 3, col = 5 })
, ('M', Coord { row = 3, col = 6 })
, (',', Coord { row = 3, col = 7 })
, ('.', Coord { row = 3, col = 8 })
, ('/', Coord { row = 3, col = 9 })
]
-- | Mapping of characters to their coordinates on a QWERTY keyboard with the
-- top-left corner as 0,0.
charToCoord :: HM.HashMap Char Coord
charToCoord = HM.fromList coords
coordToChar :: Keyboard -> Coord -> Maybe Char
coordToChar (Keyboard xxs) Coord{..} =
Just $ xxs !! row !! col
qwerty :: Keyboard
qwerty = Keyboard [ ['1','2','3','4','5','6','7','8','9','0']
, ['Q','W','E','R','T','Y','U','I','O','P']
, ['A','S','D','F','G','H','J','K','L',';']
, ['Z','X','C','V','B','N','M',',','.','/']
]
|
