module TD.Data.TextRange
  (TextRange(..)) where

import qualified Data.Aeson as A
import qualified Data.Aeson.Types as AT
import qualified TD.Lib.Internal as I

data TextRange
  = TextRange -- ^ Describes a part of a text
    { TextRange -> Maybe Int
offset  :: Maybe Int -- ^ Offset of the part, in UTF-16 code units
    , TextRange -> Maybe Int
_length :: Maybe Int -- ^ Length of the part, in UTF-16 code units
    }
  deriving (TextRange -> TextRange -> Bool
(TextRange -> TextRange -> Bool)
-> (TextRange -> TextRange -> Bool) -> Eq TextRange
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
$c== :: TextRange -> TextRange -> Bool
== :: TextRange -> TextRange -> Bool
$c/= :: TextRange -> TextRange -> Bool
/= :: TextRange -> TextRange -> Bool
Eq, Int -> TextRange -> ShowS
[TextRange] -> ShowS
TextRange -> String
(Int -> TextRange -> ShowS)
-> (TextRange -> String)
-> ([TextRange] -> ShowS)
-> Show TextRange
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
$cshowsPrec :: Int -> TextRange -> ShowS
showsPrec :: Int -> TextRange -> ShowS
$cshow :: TextRange -> String
show :: TextRange -> String
$cshowList :: [TextRange] -> ShowS
showList :: [TextRange] -> ShowS
Show)

instance I.ShortShow TextRange where
  shortShow :: TextRange -> String
shortShow TextRange
    { offset :: TextRange -> Maybe Int
offset  = Maybe Int
offset_
    , _length :: TextRange -> Maybe Int
_length = Maybe Int
_length_
    }
      = String
"TextRange"
        String -> ShowS
forall a. [a] -> [a] -> [a]
++ [String] -> String
I.cc
        [ String
"offset"  String -> Maybe Int -> String
forall a. ShortShow a => String -> Maybe a -> String
`I.p` Maybe Int
offset_
        , String
"_length" String -> Maybe Int -> String
forall a. ShortShow a => String -> Maybe a -> String
`I.p` Maybe Int
_length_
        ]

instance AT.FromJSON TextRange where
  parseJSON :: Value -> Parser TextRange
parseJSON v :: Value
v@(AT.Object Object
obj) = do
    String
t <- Object
obj Object -> Key -> Parser String
forall a. FromJSON a => Object -> Key -> Parser a
A..: Key
"@type" :: AT.Parser String

    case String
t of
      String
"textRange" -> Value -> Parser TextRange
parseTextRange Value
v
      String
_           -> Parser TextRange
forall a. Monoid a => a
mempty
    
    where
      parseTextRange :: A.Value -> AT.Parser TextRange
      parseTextRange :: Value -> Parser TextRange
parseTextRange = String -> (Object -> Parser TextRange) -> Value -> Parser TextRange
forall a. String -> (Object -> Parser a) -> Value -> Parser a
A.withObject String
"TextRange" ((Object -> Parser TextRange) -> Value -> Parser TextRange)
-> (Object -> Parser TextRange) -> Value -> Parser TextRange
forall a b. (a -> b) -> a -> b
$ \Object
o -> do
        Maybe Int
offset_  <- Object
o Object -> Key -> Parser (Maybe Int)
forall a. FromJSON a => Object -> Key -> Parser (Maybe a)
A..:?  Key
"offset"
        Maybe Int
_length_ <- Object
o Object -> Key -> Parser (Maybe Int)
forall a. FromJSON a => Object -> Key -> Parser (Maybe a)
A..:?  Key
"length"
        TextRange -> Parser TextRange
forall a. a -> Parser a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (TextRange -> Parser TextRange) -> TextRange -> Parser TextRange
forall a b. (a -> b) -> a -> b
$ TextRange
          { offset :: Maybe Int
offset  = Maybe Int
offset_
          , _length :: Maybe Int
_length = Maybe Int
_length_
          }
  parseJSON Value
_ = Parser TextRange
forall a. Monoid a => a
mempty