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module Component.Modal
( ModalIn(..)
, ModalOut(..)
, modal
) where
import Control.Monad (void)
import qualified Data.Map as M
import qualified Data.Map.Lazy as LM
import Data.Text (Text)
import qualified Data.Text as T
import Data.Time.Clock (NominalDiffTime)
import qualified GHCJS.DOM.Element as Element
import qualified GHCJS.DOM.Node as Node
import JSDOM.Types (JSString)
import Reflex.Dom (Dynamic, Event, MonadWidget)
import qualified Reflex.Dom as R
import qualified Reflex.Dom.Class as R
import qualified Util.Dom as Dom
data ModalIn t m a = ModalIn
{ _modalIn_show :: Event t ()
, _modalIn_hide :: Event t ()
, _modalIn_content :: m a
}
data ModalOut t a = ModalOut
{ _modalOut_content :: a
, _modalOut_hide :: Event t ()
}
modal :: forall t m a. MonadWidget t m => ModalIn t m a -> m (ModalOut t a)
modal modalIn = do
rec
let show = Show <$ (_modalIn_show modalIn)
startHiding =
R.attachWithMaybe
(\a _ -> if a then Just StartHiding else Nothing)
(R.current canBeHidden)
(R.leftmost [ _modalIn_hide modalIn, curtainClick ])
canBeHidden <-
R.holdDyn True $ R.leftmost
[ False <$ startHiding
, True <$ endHiding
]
endHiding <-
R.delay (0.2 :: NominalDiffTime) (EndHiding <$ startHiding)
let action =
R.leftmost [ show, startHiding, endHiding ]
modalClass <-
R.holdDyn "" (fmap getModalClass action)
(elem, (curtainClick, content)) <-
R.buildElement "div" (fmap getAttributes modalClass) $ do
(curtain, _) <- R.elAttr' "div" (M.singleton "class" "g-Modal__Curtain") $ R.blank
content <- R.divClass "g-Modal__Content" $ _modalIn_content modalIn
return (R.domEvent R.Click curtain, content)
performShowEffects action elem
return $ ModalOut
{ _modalOut_content = content
, _modalOut_hide = curtainClick
}
getAttributes :: Text -> LM.Map Text Text
getAttributes modalClass =
M.singleton "class" $
T.intercalate " " [ "g-Modal", modalClass]
performShowEffects
:: forall t m a. MonadWidget t m
=> Event t Action
-> Element.Element
-> m ()
performShowEffects showEvent elem = do
body <- Dom.getBody
let showEffects =
flip fmap showEvent (\case
Show -> do
Node.appendChild body elem
Element.setClassName body ("g-Body--Modal" :: JSString)
StartHiding ->
return ()
EndHiding -> do
Node.removeChild body elem
Element.setClassName body ("" :: JSString)
)
R.performEvent_ $ void `fmap` showEffects
data Action
= Show
| StartHiding
| EndHiding
getModalClass :: Action -> Text
getModalClass Show = "g-Modal--Show"
getModalClass StartHiding = "g-Modal--Hiding"
getModalClass _ = ""
|
