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Frontend.hs
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{-# LANGUAGE CPP #-}
{-# LANGUAGE ApplicativeDo #-}
{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DefaultSignatures #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE FunctionalDependencies #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE RecursiveDo #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE ViewPatterns #-}
module Obelisk.Route.Frontend
( module Obelisk.Route
, pattern (:~)
, Routed
, RoutedT
, runRoutedT
, askRoute
, withRoutedT
, mapRoutedT
, subRoute
, subRoute_
, pairRoute
, subPairRoute
, subPairRoute_
, maybeRoute
, maybeRoute_
, maybeRouted
, eitherRoute
, eitherRoute_
, eitherRouted
, runRouteViewT
, SetRouteT(..)
, SetRoute(..)
, runSetRouteT
, mapSetRouteT
, RouteToUrl(..)
, RouteToUrlT(..)
, runRouteToUrlT
, mapRouteToUrlT
, routeLink
, routeLinkAttr
, routeLinkDynAttr
, dynRouteLink
, adaptedUriPath
, setAdaptedUriPath
) where
#ifdef __GLASGOW_HASKELL__
#if __GLASGOW_HASKELL__ < 810
import Control.Monad ((<=<))
#endif
#if __GLASGOW_HASKELL__ >= 906
import Control.Monad (when, (<=<))
#endif
#endif
import Prelude hiding ((.), id)
import Control.Category (Category (..), (.))
import Control.Category.Cartesian ((&&&))
import Control.Lens hiding (Bifunctor, bimap, universe, element)
import Control.Monad.Fix
import Control.Monad.Morph
import Control.Monad.Primitive
import Control.Monad.Reader
import Control.Monad.Ref
import Control.Monad.Trans.Control
import Data.Coerce
import Data.Dependent.Sum (DSum (..))
import Data.Functor.Compose
import Data.Functor.Misc
import Data.GADT.Compare
import qualified Data.List as L
import Data.Map as Map (Map, lookup)
import Data.Maybe (fromMaybe)
import Data.Monoid
import Data.Proxy
import Data.Text (Text)
import qualified Data.Text as T
import Data.Type.Coercion
import qualified GHCJS.DOM as DOM
import qualified GHCJS.DOM.Types as DOM
import qualified GHCJS.DOM.Window as Window
import Language.Javascript.JSaddle (MonadJSM, jsNull, liftJSM) --TODO: Get rid of this - other platforms can also be routed
import Network.URI
import Reflex.Class
import Reflex.Dom.Builder.Class
import Reflex.Dom.Core
import Reflex.Host.Class
import Unsafe.Coerce
import Obelisk.Configs
import Obelisk.Route
infixr 5 :~
pattern (:~) :: Reflex t => f a -> Dynamic t a -> DSum f (Compose (Dynamic t) Identity)
pattern a :~ b <- a :=> (coerceDynamic . getCompose -> b)
class Routed t r m | m -> t r where
askRoute :: m (Dynamic t r)
default askRoute :: (Monad m', MonadTrans f, Routed t r m', m ~ f m') => m (Dynamic t r)
askRoute = lift askRoute
instance Monad m => Routed t r (RoutedT t r m) where
askRoute = RoutedT ask
instance (Monad m, Routed t r m) => Routed t r (ReaderT r' m)
newtype RoutedT t r m a = RoutedT { unRoutedT :: ReaderT (Dynamic t r) m a }
deriving
( Functor
, Applicative
, Monad
, MonadFix
, MonadTrans
, MFunctor
, NotReady t
, MonadHold t
, MonadSample t
, PostBuild t
, TriggerEvent t
, MonadIO
, MonadReflexCreateTrigger t
, HasDocument
, DomRenderHook t
)
instance MonadReader r' m => MonadReader r' (RoutedT t r m) where
ask = lift ask
local = mapRoutedT . local
instance (Prerender t m, Monad m) => Prerender t (RoutedT t r m) where
type Client (RoutedT t r m) = RoutedT t r (Client m)
prerender server client = RoutedT $ do
r <- ask
lift $ prerender (runRoutedT server r) (runRoutedT client r)
instance Requester t m => Requester t (RoutedT t r m) where
type Request (RoutedT t r m) = Request m
type Response (RoutedT t r m) = Response m
requesting = RoutedT . requesting
requesting_ = RoutedT . requesting_
#ifndef ghcjs_HOST_OS
deriving instance MonadJSM m => MonadJSM (RoutedT t r m)
#endif
instance PerformEvent t m => PerformEvent t (RoutedT t r m) where
type Performable (RoutedT t r m) = Performable m
performEvent = lift . performEvent
performEvent_ = lift . performEvent_
instance MonadRef m => MonadRef (RoutedT t r m) where
type Ref (RoutedT t r m) = Ref m
newRef = lift . newRef
readRef = lift . readRef
writeRef r = lift . writeRef r
deriving instance EventWriter t w m => EventWriter t w (RoutedT t r m)
instance MonadTransControl (RoutedT t r) where
type StT (RoutedT t r) a = StT (ReaderT (Dynamic t r)) a
liftWith = defaultLiftWith RoutedT unRoutedT
restoreT = defaultRestoreT RoutedT
instance PrimMonad m => PrimMonad (RoutedT t r m ) where
type PrimState (RoutedT t r m) = PrimState m
primitive = lift . primitive
instance DomBuilder t m => DomBuilder t (RoutedT t r m) where
type DomBuilderSpace (RoutedT t r m) = DomBuilderSpace m
instance Adjustable t m => Adjustable t (RoutedT t r m) where
runWithReplace a0 a' = RoutedT $ runWithReplace (coerce a0) $ coerceEvent a'
traverseIntMapWithKeyWithAdjust f a0 a' = RoutedT $ traverseIntMapWithKeyWithAdjust (coerce f) (coerce a0) $ coerce a'
traverseDMapWithKeyWithAdjust f a0 a' = RoutedT $ traverseDMapWithKeyWithAdjust (\k v -> coerce $ f k v) (coerce a0) $ coerce a'
traverseDMapWithKeyWithAdjustWithMove f a0 a' = RoutedT $ traverseDMapWithKeyWithAdjustWithMove (\k v -> coerce $ f k v) (coerce a0) $ coerce a'
instance MonadQuery t vs m => MonadQuery t vs (RoutedT t r m) where
tellQueryIncremental = lift . tellQueryIncremental
askQueryResult = lift askQueryResult
queryIncremental = lift . queryIncremental
instance HasConfigs m => HasConfigs (RoutedT t r m)
instance (Monad m, RouteToUrl r m) => RouteToUrl r (QueryT t q m)
instance (Monad m, SetRoute t r m) => SetRoute t r (QueryT t q m)
instance (Monad m, RouteToUrl r m) => RouteToUrl r (EventWriterT t w m)
instance (Monad m, SetRoute t r m) => SetRoute t r (EventWriterT t w m)
instance (Monad m, RouteToUrl r m) => RouteToUrl r (DynamicWriterT t w m)
instance (Monad m, SetRoute t r m) => SetRoute t r (DynamicWriterT t w m)
runRoutedT :: RoutedT t r m a -> Dynamic t r -> m a
runRoutedT = runReaderT . unRoutedT
mapRoutedT :: (m a -> n b) -> RoutedT t r m a -> RoutedT t r n b
mapRoutedT f = RoutedT . mapReaderT f . unRoutedT
withRoutedT :: (Dynamic t r -> Dynamic t r') -> RoutedT t r' m a -> RoutedT t r m a
withRoutedT f = RoutedT . withReaderT f . unRoutedT
subRoute_ :: (MonadFix m, MonadHold t m, GEq r, Adjustable t m) => (forall a. r a -> RoutedT t a m ()) -> RoutedT t (R r) m ()
subRoute_ f = factorRouted $ strictDynWidget_ $ \(c :=> r') -> do
runRoutedT (f c) r'
subRoute :: (MonadFix m, MonadHold t m, GEq r, Adjustable t m) => (forall a. r a -> RoutedT t a m b) -> RoutedT t (R r) m (Dynamic t b)
subRoute f = factorRouted $ strictDynWidget $ \(c :=> r') -> do
runRoutedT (f c) r'
-- | Pass the left side of the dynamic pair to the function, which then
-- routes over the right side.
pairRoute
:: (Monad m, Reflex t)
=> (Dynamic t rl -> RoutedT t rr m a)
-> RoutedT t (rl, rr) m a
pairRoute f = do
r <- askRoute
withRoutedT
(fmap snd)
(f $ fmap fst r)
{-# DEPRECATED
subPairRoute, subPairRoute_
"Use 'pairRoute' instead. This function unnecessarily eliminates the 'Dynamic' for the left side, which is poor taste. In general, we want to eliminate dynamics as little as possible as we case on the route, so when the router changes DOM is not unnecessarily recomputed."
#-}
-- | Like 'subRoute_', but with a pair rather than an R
subPairRoute_ :: (MonadFix m, MonadHold t m, Eq a, Adjustable t m) => (a -> RoutedT t b m ()) -> RoutedT t (a, b) m ()
subPairRoute_ f = withRoutedT (fmap (\(a, b) -> Const2 a :/ b)) $ subRoute_ (\(Const2 a) -> f a)
-- | Like 'subRoute_', but with a pair rather than an R
subPairRoute :: (MonadFix m, MonadHold t m, Eq a, Adjustable t m) => (a -> RoutedT t b m c) -> RoutedT t (a, b) m (Dynamic t c)
subPairRoute f = withRoutedT (fmap (\(a, b) -> Const2 a :/ b)) $ subRoute (\(Const2 a) -> f a)
maybeRoute_ :: (MonadFix m, MonadHold t m, Adjustable t m) => m () -> RoutedT t r m () -> RoutedT t (Maybe r) m ()
maybeRoute_ n j = maybeRouted $ strictDynWidget_ $ \case
Nothing -> n
Just r -> runRoutedT j r
maybeRoute :: (MonadFix m, MonadHold t m, Adjustable t m) => m a -> RoutedT t r m a -> RoutedT t (Maybe r) m (Dynamic t a)
maybeRoute n j = maybeRouted $ strictDynWidget $ \case
Nothing -> n
Just r -> runRoutedT j r
{-
maybeRoute :: (MonadFix m, MonadHold t m, GEq r, Adjustable t m) => m a -> RoutedT t r m a -> RoutedT t (Maybe r) m a
maybeRoute f = factorRouted $ strictDynWidget $ \(c :=> r') -> do
runRoutedT (f c) r'
-}
eitherRoute_
:: (MonadFix m, MonadHold t m, Adjustable t m)
=> RoutedT t l m ()
-> RoutedT t r m ()
-> RoutedT t (Either l r) m ()
eitherRoute_ l r = eitherRouted $ strictDynWidget_ $ either (runRoutedT l) (runRoutedT r)
eitherRoute
:: (MonadFix m, MonadHold t m, Adjustable t m)
=> RoutedT t l m a
-> RoutedT t r m a
-> RoutedT t (Either l r) m (Dynamic t a)
eitherRoute l r = eitherRouted $ strictDynWidget $ either (runRoutedT l) (runRoutedT r)
dsumValueCoercion :: Coercion f g -> Coercion (DSum k f) (DSum k g)
dsumValueCoercion Coercion = Coercion
dynamicIdentityCoercion :: Coercion (Compose (Dynamic t) Identity) (Dynamic t)
dynamicIdentityCoercion = unsafeCoerce (Coercion :: Coercion (Identity ()) ()) --TODO: Is it possible to prove this?
factorRouted :: (Reflex t, MonadFix m, MonadHold t m, GEq f) => RoutedT t (DSum f (Dynamic t)) m a -> RoutedT t (DSum f Identity) m a
factorRouted r = RoutedT $ ReaderT $ \d -> do
d' <- factorDyn d
runRoutedT r $ coerceWith (dynamicCoercion $ dsumValueCoercion dynamicIdentityCoercion) d'
maybeRouted :: (Reflex t, MonadFix m, MonadHold t m) => RoutedT t (Maybe (Dynamic t a)) m b -> RoutedT t (Maybe a) m b
maybeRouted r = RoutedT $ ReaderT $ \d -> do
d' <- maybeDyn d
runRoutedT r d'
eitherRouted :: (Reflex t, MonadFix m, MonadHold t m) => RoutedT t (Either (Dynamic t a) (Dynamic t b)) m c -> RoutedT t (Either a b) m c
eitherRouted r = RoutedT $ ReaderT $ runRoutedT r <=< eitherDyn
-- | WARNING: The input 'Dynamic' must be fully constructed when this is run
strictDynWidget :: (MonadHold t m, Adjustable t m) => (a -> m b) -> RoutedT t a m (Dynamic t b)
strictDynWidget f = RoutedT $ ReaderT $ \r -> do
r0 <- sample $ current r
(result0, result') <- runWithReplace (f r0) $ f <$> updated r
holdDyn result0 result'
strictDynWidget_ :: (MonadHold t m, Adjustable t m) => (a -> m ()) -> RoutedT t a m ()
strictDynWidget_ f = RoutedT $ ReaderT $ \r -> do
r0 <- sample $ current r
(_, _) <- runWithReplace (f r0) $ f <$> updated r
pure ()
newtype SetRouteT t r m a = SetRouteT { unSetRouteT :: EventWriterT t (Endo r) m a }
deriving (Functor, Applicative, Monad, MonadFix, MonadTrans, MonadIO, NotReady t, MonadHold t, MonadSample t, PostBuild t, TriggerEvent t, MonadReflexCreateTrigger t, HasDocument, DomRenderHook t)
instance (MonadFix m, MonadHold t m, DomBuilder t m) => DomBuilder t (SetRouteT t r m) where
type DomBuilderSpace (SetRouteT t r m) = DomBuilderSpace m
element t cfg child = SetRouteT $ element t cfg $ unSetRouteT child
inputElement = lift . inputElement
textAreaElement = lift . textAreaElement
selectElement cfg child = SetRouteT $ selectElement cfg $ unSetRouteT child
mapSetRouteT :: (forall x. m x -> n x) -> SetRouteT t r m a -> SetRouteT t r n a
mapSetRouteT f (SetRouteT x) = SetRouteT (mapEventWriterT f x)
runSetRouteT :: (Reflex t, Monad m) => SetRouteT t r m a -> m (a, Event t (Endo r))
runSetRouteT = runEventWriterT . unSetRouteT
class Reflex t => SetRoute t r m | m -> t r where
setRoute :: Event t r -> m ()
modifyRoute :: Event t (r -> r) -> m ()
default modifyRoute :: (Monad m', MonadTrans f, SetRoute t r m', m ~ f m') => Event t (r -> r) -> m ()
modifyRoute = lift . modifyRoute
setRoute = modifyRoute . fmap const
instance (Reflex t, Monad m) => SetRoute t r (SetRouteT t r m) where
modifyRoute = SetRouteT . tellEvent . fmap Endo
instance (Monad m, SetRoute t r m) => SetRoute t r (RoutedT t r' m)
instance (Monad m, SetRoute t r m) => SetRoute t r (ReaderT r' m)
instance (PerformEvent t m, Prerender t m, Monad m, Reflex t) => Prerender t (SetRouteT t r m) where
type Client (SetRouteT t r m) = SetRouteT t r (Client m)
prerender server client = do
d <- lift $ prerender (runSetRouteT server) (runSetRouteT client)
let (a, r) = splitDynPure d
-- Must be prompt here
SetRouteT . tellEvent $ switchPromptlyDyn r
pure a
instance Requester t m => Requester t (SetRouteT t r m) where
type Request (SetRouteT t r m) = Request m
type Response (SetRouteT t r m) = Response m
requesting = SetRouteT . requesting
requesting_ = SetRouteT . requesting_
instance (Monad m, SetRoute t r m) => SetRoute t r (RequesterT t req rsp m)
#ifndef ghcjs_HOST_OS
deriving instance MonadJSM m => MonadJSM (SetRouteT t r m)
#endif
instance PerformEvent t m => PerformEvent t (SetRouteT t r m) where
type Performable (SetRouteT t r m) = Performable m
performEvent = lift . performEvent
performEvent_ = lift . performEvent_
instance MonadRef m => MonadRef (SetRouteT t r m) where
type Ref (SetRouteT t r m) = Ref m
newRef = lift . newRef
readRef = lift . readRef
writeRef r = lift . writeRef r
instance PrimMonad m => PrimMonad (SetRouteT t r m ) where
type PrimState (SetRouteT t r m) = PrimState m
primitive = lift . primitive
instance HasConfigs m => HasConfigs (SetRouteT t r m)
instance (MonadHold t m, Adjustable t m) => Adjustable t (SetRouteT t r m) where
runWithReplace a0 a' = SetRouteT $ runWithReplace (coerce a0) $ coerceEvent a'
traverseIntMapWithKeyWithAdjust f a0 a' = SetRouteT $ traverseIntMapWithKeyWithAdjust (coerce f) (coerce a0) $ coerce a'
traverseDMapWithKeyWithAdjust f a0 a' = SetRouteT $ traverseDMapWithKeyWithAdjust (\k v -> coerce $ f k v) (coerce a0) $ coerce a'
traverseDMapWithKeyWithAdjustWithMove f a0 a' = SetRouteT $ traverseDMapWithKeyWithAdjustWithMove (\k v -> coerce $ f k v) (coerce a0) $ coerce a'
instance (MonadQuery t vs m) => MonadQuery t vs (SetRouteT t r m) where
tellQueryIncremental = lift . tellQueryIncremental
askQueryResult = lift askQueryResult
queryIncremental = lift . queryIncremental
class RouteToUrl r m | m -> r where
askRouteToUrl :: m (r -> Text)
default askRouteToUrl :: (Monad m', MonadTrans f, RouteToUrl r m', m ~ f m') => m (r -> Text)
askRouteToUrl = lift askRouteToUrl
newtype RouteToUrlT r m a = RouteToUrlT { unRouteToUrlT :: ReaderT (r -> Text) m a }
deriving (Functor, Applicative, Monad, MonadFix, MonadTrans, NotReady t, MonadHold t, MonadSample t, PostBuild t, TriggerEvent t, MonadIO, MonadReflexCreateTrigger t, HasDocument, DomRenderHook t)
runRouteToUrlT
:: RouteToUrlT r m a
-> (r -> Text)
-> m a
runRouteToUrlT a = runReaderT (unRouteToUrlT a)
mapRouteToUrlT :: (forall x. m x -> n x) -> RouteToUrlT r m a -> RouteToUrlT r n a
mapRouteToUrlT f (RouteToUrlT m) = RouteToUrlT $ mapReaderT f m
instance Monad m => RouteToUrl r (RouteToUrlT r m) where
askRouteToUrl = RouteToUrlT ask
instance (Monad m, RouteToUrl r m) => RouteToUrl r (SetRouteT t r' m) where
instance (Monad m, RouteToUrl r m) => RouteToUrl r (RoutedT t r' m) where
instance (Monad m, RouteToUrl r m) => RouteToUrl r (ReaderT r' m) where
instance (Monad m, RouteToUrl r m) => RouteToUrl r (RequesterT t req rsp m)
instance (Prerender t m, Monad m) => Prerender t (RouteToUrlT r m) where
type Client (RouteToUrlT r m) = RouteToUrlT r (Client m)
prerender server client = do
r <- RouteToUrlT ask
lift $ prerender (runRouteToUrlT server r) (runRouteToUrlT client r)
instance Requester t m => Requester t (RouteToUrlT r m) where
type Request (RouteToUrlT r m) = Request m
type Response (RouteToUrlT r m) = Response m
requesting = RouteToUrlT . requesting
requesting_ = RouteToUrlT . requesting_
#ifndef ghcjs_HOST_OS
deriving instance MonadJSM m => MonadJSM (RouteToUrlT r m)
#endif
instance PerformEvent t m => PerformEvent t (RouteToUrlT r m) where
type Performable (RouteToUrlT r m) = Performable m
performEvent = lift . performEvent
performEvent_ = lift . performEvent_
instance MonadRef m => MonadRef (RouteToUrlT r m) where
type Ref (RouteToUrlT r m) = Ref m
newRef = lift . newRef
readRef = lift . readRef
writeRef r = lift . writeRef r
instance MonadTransControl (RouteToUrlT r) where
type StT (RouteToUrlT r) a = StT (ReaderT (r -> Text)) a
liftWith = defaultLiftWith RouteToUrlT unRouteToUrlT
restoreT = defaultRestoreT RouteToUrlT
instance PrimMonad m => PrimMonad (RouteToUrlT r m ) where
type PrimState (RouteToUrlT r m) = PrimState m
primitive = lift . primitive
instance DomBuilder t m => DomBuilder t (RouteToUrlT r m) where
type DomBuilderSpace (RouteToUrlT r m) = DomBuilderSpace m
instance Adjustable t m => Adjustable t (RouteToUrlT r m) where
runWithReplace a0 a' = RouteToUrlT $ runWithReplace (coerce a0) $ coerceEvent a'
traverseIntMapWithKeyWithAdjust f a0 a' = RouteToUrlT $ traverseIntMapWithKeyWithAdjust (coerce f) (coerce a0) $ coerce a'
traverseDMapWithKeyWithAdjust f a0 a' = RouteToUrlT $ traverseDMapWithKeyWithAdjust (\k v -> coerce $ f k v) (coerce a0) $ coerce a'
traverseDMapWithKeyWithAdjustWithMove f a0 a' = RouteToUrlT $ traverseDMapWithKeyWithAdjustWithMove (\k v -> coerce $ f k v) (coerce a0) $ coerce a'
instance MonadQuery t vs m => MonadQuery t vs (RouteToUrlT r m) where
tellQueryIncremental = lift . tellQueryIncremental
askQueryResult = lift askQueryResult
queryIncremental = lift . queryIncremental
instance HasConfigs m => HasConfigs (RouteToUrlT t m)
runRouteViewT
:: forall t m r a.
( TriggerEvent t m
, PerformEvent t m
, MonadHold t m
, MonadJSM m
, MonadJSM (Performable m)
, MonadFix m
)
=> Encoder Identity Identity r PageName
--TODO: Get rid of the switchover and useHash arguments
-- useHash can probably be baked into the encoder
-> Event t () -- ^ Switchover event, nothing is done until this event fires. Used to prevent incorrect DOM expectations at hydration switchover time
-> Bool
-> RoutedT t r (SetRouteT t r (RouteToUrlT r m)) a
-> m a
runRouteViewT routeEncoder switchover useHash a = do
rec historyState <- manageHistory' switchover $ HistoryCommand_PushState <$> setState
let theEncoder = pageNameEncoder . hoistParse (pure . runIdentity) routeEncoder
-- NB: The can only fail if the uriPath doesn't begin with a '/' or if the uriQuery
-- is nonempty, but begins with a character that isn't '?'. Since we don't expect
-- this ever to happen, we'll just handle it by failing completely with 'error'.
route :: Dynamic t r
route = fmap (errorLeft . tryDecode theEncoder . (adaptedUriPath useHash &&& uriQuery) . _historyItem_uri) historyState
where
errorLeft (Left e) = error (T.unpack e)
errorLeft (Right x) = x
(result, changeState) <- runRouteToUrlT (runSetRouteT $ runRoutedT a route) $ (\(p, q) -> T.pack $ p <> q) . encode theEncoder
let f (currentHistoryState, oldRoute) change =
let newRoute = appEndo change oldRoute
(newPath, newQuery) = encode theEncoder newRoute
in HistoryStateUpdate
{ _historyStateUpdate_state = DOM.SerializedScriptValue jsNull
-- We always provide "" as the title. On Firefox, Chrome, and
-- Edge, this parameter does nothing. On Safari, "" has the
-- same behavior as other browsers (as far as I can tell), but
-- anything else sets the title for the back button list item
-- the *next* time pushState is called, unless the page title
-- is changed in the interim. Since the Safari functionality
-- is near-pointless and also confusing, I'm not going to even
-- bother exposing it; if there ends up being a real use case,
-- we can change this function later to accommodate.
-- See: https://github.com/whatwg/html/issues/2174
, _historyStateUpdate_title = ""
, _historyStateUpdate_uri = Just $ setAdaptedUriPath useHash newPath $ (_historyItem_uri currentHistoryState)
{ uriQuery = newQuery
}
}
setState = attachWith f ((,) <$> current historyState <*> current route) changeState
return result
-- | A link widget that, when clicked, sets the route to the provided route. In non-javascript
-- contexts, this widget falls back to using @href@s to control navigation
routeLink
:: forall t m a route.
( DomBuilder t m
, RouteToUrl route m
, SetRoute t route m
, Prerender t m
)
=> route -- ^ Target route
-> m a -- ^ Child widget
-> m a
routeLink r w = do
(e, a) <- routeLinkImpl mempty r w
scrollToTop e
return a
-- | Like 'routeLink', but takes additional attributes as argument.
--
routeLinkAttr
:: forall t m a route.
( DomBuilder t m
, RouteToUrl route m
, SetRoute t route m
, Prerender t m
)
=> Map AttributeName Text -- ^ Additional attributes
-> route -- ^ Target route
-> m a -- ^ Child widget
-> m a
routeLinkAttr attrs r w = do
(e, a) <- routeLinkImpl attrs r w
let
targetBlank = Map.lookup "target" attrs == Just "_blank"
when (not targetBlank) $ scrollToTop e
return a
-- | Raw implementation of 'routeLink'. Does not scroll to the top of the page on clicks.
routeLinkImpl
:: forall t m a route.
( DomBuilder t m
, RouteToUrl route m
, SetRoute t route m
)
=> Map AttributeName Text
-> route -- ^ Target route
-> m a -- ^ Child widget
-> m (Event t (), a)
routeLinkImpl attrs r w = do
enc <- askRouteToUrl
let
-- If targetBlank == True, the link will be opened in another page. In that
-- case, we don't prevent the default behaviour, and we don't need to
-- setRoute.
targetBlank = Map.lookup "target" attrs == Just "_blank"
cfg = (def :: ElementConfig EventResult t (DomBuilderSpace m))
& elementConfig_initialAttributes .~ ("href" =: enc r <> attrs)
& (if targetBlank
then id
else elementConfig_eventSpec %~ addEventSpecFlags (Proxy :: Proxy (DomBuilderSpace m)) Click (const preventDefault))
(e, a) <- element "a" cfg w
when (not targetBlank) $ setRoute $ r <$ domEvent Click e
return (domEvent Click e, a)
scrollToTop :: forall m t. (Prerender t m, Monad m) => Event t () -> m ()
scrollToTop e = prerender_ blank $ performEvent_ $ ffor e $ \_ -> liftJSM $ DOM.currentWindow >>= \case
Nothing -> pure ()
Just win -> Window.scrollTo win 0 0
-- | Like 'routeLinkDynAttr' but without custom attributes.
dynRouteLink
:: forall t m a route.
( DomBuilder t m
, PostBuild t m
, RouteToUrl route m
, SetRoute t route m
, Prerender t m
)
=> Dynamic t route -- ^ Target route
-> m a -- ^ Child widget
-> m a
dynRouteLink r w = do
(e, a) <- dynRouteLinkImpl r w
scrollToTop e
return a
-- | Raw implementation of 'dynRouteLink'. Does not scroll to the top of the page on clicks.
dynRouteLinkImpl
:: forall t m a route.
( DomBuilder t m
, PostBuild t m
, RouteToUrl route m
, SetRoute t route m
)
=> Dynamic t route -- ^ Target route
-> m a -- ^ Child widget
-> m (Event t (), a)
dynRouteLinkImpl dr w = do
enc <- askRouteToUrl
er <- dynamicAttributesToModifyAttributes $ ("href" =:) . enc <$> dr
let cfg = (def :: ElementConfig EventResult t (DomBuilderSpace m))
& elementConfig_eventSpec %~ addEventSpecFlags (Proxy :: Proxy (DomBuilderSpace m)) Click (const preventDefault)
& elementConfig_modifyAttributes .~ er
(e, a) <- element "a" cfg w
let clk = domEvent Click e
setRoute $ tag (current dr) clk
return (clk, a)
-- | An @a@-tag link widget that, when clicked, sets the route to current value of the
-- provided dynamic route. In non-JavaScript contexts the value of the dynamic post
-- build is used so the link still works like 'routeLink'.
routeLinkDynAttr
:: forall t m a route.
( DomBuilder t m
, PostBuild t m
, RouteToUrl (R route) m
, SetRoute t (R route) m
, Prerender t m
)
=> Dynamic t (Map AttributeName Text) -- ^ Attributes for @a@ element. Note that if @href@ is present it will be ignored
-> Dynamic t (R route) -- ^ Target route
-> m a -- ^ Child widget of the @a@ element
-> m a
routeLinkDynAttr dAttr dr w = do
(e, a) <- routeLinkDynAttrImpl dAttr dr w
scrollToTop e
return a
-- | Raw implementation of 'routeLinkDynAttr'. Does not scroll to the top of the page on clicks.
routeLinkDynAttrImpl
:: forall t m a route.
( DomBuilder t m
, PostBuild t m
, RouteToUrl (R route) m
, SetRoute t (R route) m
)
=> Dynamic t (Map AttributeName Text) -- ^ Attributes for @a@ element. Note that if @href@ is present it will be ignored
-> Dynamic t (R route) -- ^ Target route
-> m a -- ^ Child widget of the @a@ element
-> m (Event t (), a)
routeLinkDynAttrImpl dAttr dr w = do
enc <- askRouteToUrl
er <- dynamicAttributesToModifyAttributes $ zipDynWith (<>) (("href" =:) . enc <$> dr) dAttr
let cfg = (def :: ElementConfig EventResult t (DomBuilderSpace m))
& elementConfig_eventSpec %~ addEventSpecFlags (Proxy :: Proxy (DomBuilderSpace m)) Click (const preventDefault)
& elementConfig_modifyAttributes .~ er
(e, a) <- element "a" cfg w
let clk = domEvent Click e
setRoute $ tag (current dr) clk
return (clk, a)
-- On ios due to sandboxing when loading the page from a file adapt the
-- path to be based on the hash.
adaptedUriPath :: Bool -> URI -> String
adaptedUriPath = \case
True -> hashToPath . uriFragment
False -> uriPath
setAdaptedUriPath :: Bool -> String -> URI -> URI
setAdaptedUriPath useHash s u = case useHash of
True -> u { uriFragment = pathToHash s }
False -> u { uriPath = s }
pathToHash :: String -> String
pathToHash = ('#' :) . fromMaybe "" . L.stripPrefix "/"
hashToPath :: String -> String
hashToPath = ('/' :) . fromMaybe "" . L.stripPrefix "#"