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
|
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
--------------------------------------------------------------------------------
module Keyboard where
--------------------------------------------------------------------------------
import Utils
import Data.Coerce
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 =
qwerty
|> coerce
|> fmap (zip [0..])
|> zip [0..]
|> fmap (\(row, xs) -> xs |> fmap (\(col, char) -> (char, Coord row col)))
|> mconcat
-- | 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',',','.','/']
]
|
