/
ReadyState.purs
54 lines (45 loc) · 1.46 KB
/
ReadyState.purs
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module Web.HTML.HTMLMediaElement.ReadyState (ReadyState(..)) where
import Prelude
import Data.Maybe (Maybe(..))
import Data.Enum (class Enum, class BoundedEnum, Cardinality(..), defaultSucc, defaultPred)
data ReadyState
= HaveNothing
| HaveMetadata
| HaveCurrentData
| HaveFutureData
| HaveEnoughData
derive instance eqReadyState :: Eq ReadyState
derive instance ordReadyState :: Ord ReadyState
instance boundedReadyState :: Bounded ReadyState where
bottom = HaveNothing
top = HaveEnoughData
instance enumReadyState :: Enum ReadyState where
succ = defaultSucc toEnumReadyState fromEnumReadyState
pred = defaultPred toEnumReadyState fromEnumReadyState
instance boundedEnumReadyState :: BoundedEnum ReadyState where
cardinality = Cardinality 5
toEnum = toEnumReadyState
fromEnum = fromEnumReadyState
instance showReadyState :: Show ReadyState where
show HaveNothing = "HaveNothing"
show HaveMetadata = "HaveMetadata"
show HaveCurrentData = "HaveCurrentData"
show HaveFutureData = "HaveFutureData"
show HaveEnoughData = "HaveEnoughData"
toEnumReadyState :: Int -> Maybe ReadyState
toEnumReadyState =
case _ of
0 -> Just HaveNothing
1 -> Just HaveMetadata
2 -> Just HaveCurrentData
3 -> Just HaveFutureData
4 -> Just HaveEnoughData
_ -> Nothing
fromEnumReadyState :: ReadyState -> Int
fromEnumReadyState =
case _ of
HaveNothing -> 0
HaveMetadata -> 1
HaveCurrentData -> 2
HaveFutureData -> 3
HaveEnoughData -> 4