{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecursiveDo #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
module Reflex.Dom.Widget.Lazy where
import Reflex.Class
import Reflex.Collection
import Reflex.Dom.Builder.Class
import Reflex.Dom.Builder.Immediate
import Reflex.Dom.Class
import Reflex.Dom.Widget.Basic
import Reflex.Dynamic
import Reflex.PerformEvent.Class
import Reflex.PostBuild.Class
import Control.Monad.Fix
import Data.Fixed
import Data.Map (Map)
import qualified Data.Map as Map
import Data.Monoid
import Data.Text (Text)
import qualified Data.Text as T
import GHCJS.DOM.Element
import GHCJS.DOM.Types (MonadJSM)
virtualListWithSelection :: forall t m k v. (DomBuilder t m, PostBuild t m, MonadHold t m, PerformEvent t m, MonadJSM (Performable m), DomBuilderSpace m ~ GhcjsDomSpace, MonadFix m, Ord k)
=> Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> Text
-> Dynamic t (Map Text Text)
-> Text
-> Dynamic t (Map Text Text)
-> (k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m ())
-> Dynamic t (Map k v)
-> (Int -> k)
-> m (Dynamic t (Int, Int), Event t k)
virtualListWithSelection :: Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> Text
-> Dynamic t (Map Text Text)
-> Text
-> Dynamic t (Map Text Text)
-> (k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m ())
-> Dynamic t (Map k v)
-> (Int -> k)
-> m (Dynamic t (Int, Int), Event t k)
virtualListWithSelection Dynamic t Int
heightPx Int
rowPx Dynamic t Int
maxIndex Int
i0 Event t Int
setI Text
listTag Dynamic t (Map Text Text)
listAttrs Text
rowTag Dynamic t (Map Text Text)
rowAttrs k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m ()
itemBuilder Dynamic t (Map k v)
items Int -> k
indexToKey = do
let totalHeightStyle :: Dynamic t (Map Text Text)
totalHeightStyle = (Int -> Map Text Text)
-> Dynamic t Int -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
toHeightStyle (Int -> Map Text Text) -> (Int -> Int) -> Int -> Map Text Text
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int -> Int -> Int
forall a. Num a => a -> a -> a
(*) Int
rowPx) Dynamic t Int
maxIndex
containerStyle :: Dynamic t (Map Text Text)
containerStyle = (Int -> Map Text Text)
-> Dynamic t Int -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
toContainer Dynamic t Int
heightPx
viewportStyle :: Dynamic t (Map Text Text)
viewportStyle = (Int -> Map Text Text)
-> Dynamic t Int -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
toViewport Dynamic t Int
heightPx
rec (Element EventResult GhcjsDomSpace t
container, Event t k
sel) <- Text
-> Dynamic t (Map Text Text)
-> m (Element EventResult GhcjsDomSpace t, Event t k)
-> m (Element EventResult GhcjsDomSpace t, Event t k)
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text -> Dynamic t (Map Text Text) -> m a -> m a
elDynAttr Text
"div" Dynamic t (Map Text Text)
containerStyle (m (Element EventResult GhcjsDomSpace t, Event t k)
-> m (Element EventResult GhcjsDomSpace t, Event t k))
-> m (Element EventResult GhcjsDomSpace t, Event t k)
-> m (Element EventResult GhcjsDomSpace t, Event t k)
forall a b. (a -> b) -> a -> b
$ Text
-> Dynamic t (Map Text Text)
-> m (Event t k)
-> m (Element EventResult (DomBuilderSpace m) t, Event t k)
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
elDynAttr' Text
"div" Dynamic t (Map Text Text)
viewportStyle (m (Event t k)
-> m (Element EventResult (DomBuilderSpace m) t, Event t k))
-> m (Event t k)
-> m (Element EventResult (DomBuilderSpace m) t, Event t k)
forall a b. (a -> b) -> a -> b
$ do
let currentTop :: Dynamic t (Map Text Text)
currentTop = ((Int, (Int, Int)) -> Map Text Text)
-> Dynamic t (Int, (Int, Int)) -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
listWrapperStyle (Int -> Map Text Text)
-> ((Int, (Int, Int)) -> Int) -> (Int, (Int, Int)) -> Map Text Text
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Int, (Int, Int)) -> Int
forall a b. (a, b) -> a
fst) Dynamic t (Int, (Int, Int))
window
(Element EventResult GhcjsDomSpace t
_, Event t k
lis) <- Text
-> Dynamic t (Map Text Text)
-> m (Element EventResult GhcjsDomSpace t, Event t k)
-> m (Element EventResult GhcjsDomSpace t, Event t k)
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text -> Dynamic t (Map Text Text) -> m a -> m a
elDynAttr Text
"div" Dynamic t (Map Text Text)
totalHeightStyle (m (Element EventResult GhcjsDomSpace t, Event t k)
-> m (Element EventResult GhcjsDomSpace t, Event t k))
-> m (Element EventResult GhcjsDomSpace t, Event t k)
-> m (Element EventResult GhcjsDomSpace t, Event t k)
forall a b. (a -> b) -> a -> b
$ Text
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
-> m (Event t k)
-> m (Element EventResult (DomBuilderSpace m) t, Event t k)
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
tagWrapper Text
listTag Dynamic t (Map Text Text)
listAttrs Dynamic t (Map Text Text)
currentTop (m (Event t k)
-> m (Element EventResult (DomBuilderSpace m) t, Event t k))
-> m (Event t k)
-> m (Element EventResult (DomBuilderSpace m) t, Event t k)
forall a b. (a -> b) -> a -> b
$ Dynamic t k
-> Dynamic t (Map k (Maybe v))
-> (k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m (Event t k))
-> m (Event t k)
forall t (m :: * -> *) k v a.
(Adjustable t m, Ord k, PostBuild t m, MonadHold t m,
MonadFix m) =>
Dynamic t k
-> Dynamic t (Map k v)
-> (k -> Dynamic t v -> Dynamic t Bool -> m (Event t a))
-> m (Event t k)
selectViewListWithKey_ Dynamic t k
selected Dynamic t (Map k (Maybe v))
itemsInWindow ((k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m (Event t k))
-> m (Event t k))
-> (k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m (Event t k))
-> m (Event t k)
forall a b. (a -> b) -> a -> b
$ \k
k Dynamic t (Maybe v)
v Dynamic t Bool
s -> do
(Element EventResult GhcjsDomSpace t
li,()
_) <- Text
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
-> m ()
-> m (Element EventResult (DomBuilderSpace m) t, ())
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
tagWrapper Text
rowTag Dynamic t (Map Text Text)
rowAttrs (Map Text Text -> Dynamic t (Map Text Text)
forall k (t :: k) a. Reflex t => a -> Dynamic t a
constDyn (Map Text Text -> Dynamic t (Map Text Text))
-> Map Text Text -> Dynamic t (Map Text Text)
forall a b. (a -> b) -> a -> b
$ Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
toHeightStyle Int
rowPx) (m () -> m (Element EventResult (DomBuilderSpace m) t, ()))
-> m () -> m (Element EventResult (DomBuilderSpace m) t, ())
forall a b. (a -> b) -> a -> b
$ k -> Dynamic t (Maybe v) -> Dynamic t Bool -> m ()
itemBuilder k
k Dynamic t (Maybe v)
v Dynamic t Bool
s
Event t k -> m (Event t k)
forall (m :: * -> *) a. Monad m => a -> m a
return (Event t k -> m (Event t k)) -> Event t k -> m (Event t k)
forall a b. (a -> b) -> a -> b
$ (() -> k) -> Event t () -> Event t k
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (k -> () -> k
forall a b. a -> b -> a
const k
k) (EventName 'ClickTag
-> Element EventResult GhcjsDomSpace t
-> Event
t (DomEventType (Element EventResult GhcjsDomSpace t) 'ClickTag)
forall k (t :: k) target (eventName :: EventTag).
HasDomEvent t target eventName =>
EventName eventName
-> target -> Event t (DomEventType target eventName)
domEvent EventName 'ClickTag
Click Element EventResult GhcjsDomSpace t
li)
Event t k -> m (Event t k)
forall (m :: * -> *) a. Monad m => a -> m a
return Event t k
lis
Dynamic t k
selected <- k -> Event t k -> m (Dynamic t k)
forall k (t :: k) (m :: * -> *) a.
MonadHold t m =>
a -> Event t a -> m (Dynamic t a)
holdDyn (Int -> k
indexToKey Int
i0) Event t k
sel
Event t ()
pb <- m (Event t ())
forall t (m :: * -> *). PostBuild t m => m (Event t ())
getPostBuild
Dynamic t Int
scrollPosition <- Int -> Event t Int -> m (Dynamic t Int)
forall k (t :: k) (m :: * -> *) a.
MonadHold t m =>
a -> Event t a -> m (Dynamic t a)
holdDyn Int
0 (Event t Int -> m (Dynamic t Int))
-> Event t Int -> m (Dynamic t Int)
forall a b. (a -> b) -> a -> b
$ [Event t Int] -> Event t Int
forall k (t :: k) a. Reflex t => [Event t a] -> Event t a
leftmost [ Double -> Int
forall a b. (RealFrac a, Integral b) => a -> b
round (Double -> Int) -> Event t Double -> Event t Int
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> EventName 'ScrollTag
-> Element EventResult GhcjsDomSpace t
-> Event
t (DomEventType (Element EventResult GhcjsDomSpace t) 'ScrollTag)
forall k (t :: k) target (eventName :: EventTag).
HasDomEvent t target eventName =>
EventName eventName
-> target -> Event t (DomEventType target eventName)
domEvent EventName 'ScrollTag
Scroll Element EventResult GhcjsDomSpace t
container
, (() -> Int) -> Event t () -> Event t Int
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Int -> () -> Int
forall a b. a -> b -> a
const (Int
i0 Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
rowPx)) Event t ()
pb
]
let window :: Dynamic t (Int, (Int, Int))
window = (Int -> Int -> (Int, (Int, Int)))
-> Dynamic t Int -> Dynamic t Int -> Dynamic t (Int, (Int, Int))
forall k (t :: k) a b c.
Reflex t =>
(a -> b -> c) -> Dynamic t a -> Dynamic t b -> Dynamic t c
zipDynWith (Int -> Int -> Int -> (Int, (Int, Int))
forall b. Integral b => b -> b -> b -> (b, (b, b))
findWindow Int
rowPx) Dynamic t Int
heightPx Dynamic t Int
scrollPosition
itemsInWindow :: Dynamic t (Map k (Maybe v))
itemsInWindow = ((Int, (Int, Int)) -> Map k v -> Map k (Maybe v))
-> Dynamic t (Int, (Int, Int))
-> Dynamic t (Map k v)
-> Dynamic t (Map k (Maybe v))
forall k (t :: k) a b c.
Reflex t =>
(a -> b -> c) -> Dynamic t a -> Dynamic t b -> Dynamic t c
zipDynWith (\(Int
_,(Int
idx,Int
num)) Map k v
is -> [(k, Maybe v)] -> Map k (Maybe v)
forall k a. Ord k => [(k, a)] -> Map k a
Map.fromList ([(k, Maybe v)] -> Map k (Maybe v))
-> [(k, Maybe v)] -> Map k (Maybe v)
forall a b. (a -> b) -> a -> b
$ (Int -> (k, Maybe v)) -> [Int] -> [(k, Maybe v)]
forall a b. (a -> b) -> [a] -> [b]
map (\Int
i -> let ix :: k
ix = Int -> k
indexToKey Int
i in (k
ix, k -> Map k v -> Maybe v
forall k a. Ord k => k -> Map k a -> Maybe a
Map.lookup k
ix Map k v
is)) [Int
idx .. Int
idx Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
num]) Dynamic t (Int, (Int, Int))
window Dynamic t (Map k v)
items
Event t ()
postBuild <- m (Event t ())
forall t (m :: * -> *). PostBuild t m => m (Event t ())
getPostBuild
Event t (Performable m ()) -> m ()
forall t (m :: * -> *).
PerformEvent t m =>
Event t (Performable m ()) -> m ()
performEvent_ (Event t (Performable m ()) -> m ())
-> Event t (Performable m ()) -> m ()
forall a b. (a -> b) -> a -> b
$ Event t Int
-> (Int -> Performable m ()) -> Event t (Performable m ())
forall (f :: * -> *) a b. Functor f => f a -> (a -> b) -> f b
ffor ([Event t Int] -> Event t Int
forall k (t :: k) a. Reflex t => [Event t a] -> Event t a
leftmost [Event t Int
setI, Int
i0 Int -> Event t () -> Event t Int
forall (f :: * -> *) a b. Functor f => a -> f b -> f a
<$ Event t ()
postBuild]) ((Int -> Performable m ()) -> Event t (Performable m ()))
-> (Int -> Performable m ()) -> Event t (Performable m ())
forall a b. (a -> b) -> a -> b
$ \Int
i ->
Element -> Int -> Performable m ()
forall (m :: * -> *) self.
(MonadDOM m, IsElement self) =>
self -> Int -> m ()
setScrollTop (Element EventResult GhcjsDomSpace t -> RawElement GhcjsDomSpace
forall (er :: EventTag -> *) k1 (d :: k1) k2 (t :: k2).
Element er d t -> RawElement d
_element_raw Element EventResult GhcjsDomSpace t
container) (Int
i Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
rowPx)
let indexAndLength :: Dynamic t (Int, Int)
indexAndLength = ((Int, (Int, Int)) -> (Int, Int))
-> Dynamic t (Int, (Int, Int)) -> Dynamic t (Int, Int)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Int, (Int, Int)) -> (Int, Int)
forall a b. (a, b) -> b
snd Dynamic t (Int, (Int, Int))
window
(Dynamic t (Int, Int), Event t k)
-> m (Dynamic t (Int, Int), Event t k)
forall (m :: * -> *) a. Monad m => a -> m a
return (Dynamic t (Int, Int)
indexAndLength, Event t k
sel)
where
toStyleAttr :: Map (IxValue m) (IxValue m) -> m
toStyleAttr Map (IxValue m) (IxValue m)
m = Index m
"style" Index m -> IxValue m -> m
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (IxValue m -> IxValue m -> IxValue m -> IxValue m)
-> IxValue m -> Map (IxValue m) (IxValue m) -> IxValue m
forall k a b. (k -> a -> b -> b) -> b -> Map k a -> b
Map.foldrWithKey (\IxValue m
k IxValue m
v IxValue m
s -> IxValue m
k IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
":" IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
v IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
";" IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
s) IxValue m
"" Map (IxValue m) (IxValue m)
m
toViewport :: a -> m
toViewport a
h = Map (IxValue m) (IxValue m) -> m
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue m) (IxValue m) -> m)
-> Map (IxValue m) (IxValue m) -> m
forall a b. (a -> b) -> a -> b
$ Index (Map (IxValue m) (IxValue m))
"overflow" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"auto" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"position" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"absolute" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<>
Index (Map (IxValue m) (IxValue m))
"left" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"0" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"right" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"0" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"height" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (a -> String
forall a. Show a => a -> String
show a
h) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px")
toContainer :: a -> m
toContainer a
h = Map (IxValue m) (IxValue m) -> m
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue m) (IxValue m) -> m)
-> Map (IxValue m) (IxValue m) -> m
forall a b. (a -> b) -> a -> b
$ Index (Map (IxValue m) (IxValue m))
"position" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"relative" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"height" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (a -> String
forall a. Show a => a -> String
show a
h) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px")
listWrapperStyle :: a -> m
listWrapperStyle a
t = Map (IxValue m) (IxValue m) -> m
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue m) (IxValue m) -> m)
-> Map (IxValue m) (IxValue m) -> m
forall a b. (a -> b) -> a -> b
$ Index (Map (IxValue m) (IxValue m))
"position" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"relative" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<>
Index (Map (IxValue m) (IxValue m))
"top" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (a -> String
forall a. Show a => a -> String
show a
t) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px")
toHeightStyle :: a -> m
toHeightStyle a
h = Map (IxValue m) (IxValue m) -> m
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Index (Map (IxValue m) (IxValue m))
"height" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (a -> String
forall a. Show a => a -> String
show a
h) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px") Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"overflow" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"hidden")
tagWrapper :: Text
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
tagWrapper Text
elTag Dynamic t (Map Text Text)
attrs Dynamic t (Map Text Text)
attrsOverride m a
c = do
let attrs' :: Dynamic t (Map Text Text)
attrs' = (Map Text Text -> Map Text Text -> Map Text Text)
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
-> Dynamic t (Map Text Text)
forall k (t :: k) a b c.
Reflex t =>
(a -> b -> c) -> Dynamic t a -> Dynamic t b -> Dynamic t c
zipDynWith Map Text Text -> Map Text Text -> Map Text Text
forall k a. Ord k => Map k a -> Map k a -> Map k a
Map.union Dynamic t (Map Text Text)
attrsOverride Dynamic t (Map Text Text)
attrs
Text
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
elDynAttr' Text
elTag Dynamic t (Map Text Text)
attrs' m a
c
findWindow :: b -> b -> b -> (b, (b, b))
findWindow b
sizeIncrement b
windowSize b
startingPosition =
let (b
startingIndex, b
topOffsetPx) = b
startingPosition b -> b -> (b, b)
forall a b. (Real a, Integral b) => a -> a -> (b, a)
`divMod'` b
sizeIncrement
topPx :: b
topPx = b
startingPosition b -> b -> b
forall a. Num a => a -> a -> a
- b
topOffsetPx
numItems :: b
numItems = b
windowSize b -> b -> b
forall a. Integral a => a -> a -> a
`div` b
sizeIncrement b -> b -> b
forall a. Num a => a -> a -> a
+ b
1
preItems :: b
preItems = b -> b -> b
forall a. Ord a => a -> a -> a
min b
startingIndex b
numItems
in (b
topPx b -> b -> b
forall a. Num a => a -> a -> a
- b
preItems b -> b -> b
forall a. Num a => a -> a -> a
* b
sizeIncrement, (b
startingIndex b -> b -> b
forall a. Num a => a -> a -> a
- b
preItems, b
preItems b -> b -> b
forall a. Num a => a -> a -> a
+ b
numItems b -> b -> b
forall a. Num a => a -> a -> a
* b
2))
virtualList :: forall t m k v a. (DomBuilder t m, PostBuild t m, MonadHold t m, PerformEvent t m, MonadJSM (Performable m), DomBuilderSpace m ~ GhcjsDomSpace, MonadFix m, Ord k)
=> Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> (k -> Int)
-> Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Dynamic t (Int, Int), Dynamic t (Map k a))
virtualList :: Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> (k -> Int)
-> Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Dynamic t (Int, Int), Dynamic t (Map k a))
virtualList Dynamic t Int
heightPx Int
rowPx Dynamic t Int
maxIndex Int
i0 Event t Int
setI k -> Int
keyToIndex Map k v
items0 Event t (Map k (Maybe v))
itemsUpdate k -> v -> Event t v -> m a
itemBuilder = do
let virtualH :: Dynamic t (Map Text Text)
virtualH = Int -> Map Text Text
mkVirtualHeight (Int -> Map Text Text)
-> Dynamic t Int -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Dynamic t Int
maxIndex
containerStyle :: Dynamic t (Map Text Text)
containerStyle = (Int -> Map Text Text)
-> Dynamic t Int -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
mkContainer Dynamic t Int
heightPx
viewportStyle :: Dynamic t (Map Text Text)
viewportStyle = (Int -> Map Text Text)
-> Dynamic t Int -> Dynamic t (Map Text Text)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap Int -> Map Text Text
forall m a.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Ord (IxValue m), Show a, Semigroup (IxValue m),
IxValue m ~ Text) =>
a -> m
mkViewport Dynamic t Int
heightPx
Event t ()
pb <- m (Event t ())
forall t (m :: * -> *). PostBuild t m => m (Event t ())
getPostBuild
rec (Element EventResult GhcjsDomSpace t
viewport, Dynamic t (Map k a)
result) <- Text
-> Dynamic t (Map Text Text)
-> m (Element EventResult GhcjsDomSpace t, Dynamic t (Map k a))
-> m (Element EventResult GhcjsDomSpace t, Dynamic t (Map k a))
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text -> Dynamic t (Map Text Text) -> m a -> m a
elDynAttr Text
"div" Dynamic t (Map Text Text)
containerStyle (m (Element EventResult GhcjsDomSpace t, Dynamic t (Map k a))
-> m (Element EventResult GhcjsDomSpace t, Dynamic t (Map k a)))
-> m (Element EventResult GhcjsDomSpace t, Dynamic t (Map k a))
-> m (Element EventResult GhcjsDomSpace t, Dynamic t (Map k a))
forall a b. (a -> b) -> a -> b
$ Text
-> Dynamic t (Map Text Text)
-> m (Dynamic t (Map k a))
-> m (Element EventResult (DomBuilderSpace m) t,
Dynamic t (Map k a))
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text
-> Dynamic t (Map Text Text)
-> m a
-> m (Element EventResult (DomBuilderSpace m) t, a)
elDynAttr' Text
"div" Dynamic t (Map Text Text)
viewportStyle (m (Dynamic t (Map k a))
-> m (Element EventResult (DomBuilderSpace m) t,
Dynamic t (Map k a)))
-> m (Dynamic t (Map k a))
-> m (Element EventResult (DomBuilderSpace m) t,
Dynamic t (Map k a))
forall a b. (a -> b) -> a -> b
$ Text
-> Dynamic t (Map Text Text)
-> m (Dynamic t (Map k a))
-> m (Dynamic t (Map k a))
forall t (m :: * -> *) a.
(DomBuilder t m, PostBuild t m) =>
Text -> Dynamic t (Map Text Text) -> m a -> m a
elDynAttr Text
"div" Dynamic t (Map Text Text)
virtualH (m (Dynamic t (Map k a)) -> m (Dynamic t (Map k a)))
-> m (Dynamic t (Map k a)) -> m (Dynamic t (Map k a))
forall a b. (a -> b) -> a -> b
$
Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Dynamic t (Map k a))
forall k t (m :: * -> *) v a.
(Ord k, Adjustable t m, MonadFix m, MonadHold t m) =>
Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Dynamic t (Map k a))
listWithKeyShallowDiff Map k v
items0 Event t (Map k (Maybe v))
itemsUpdate ((k -> v -> Event t v -> m a) -> m (Dynamic t (Map k a)))
-> (k -> v -> Event t v -> m a) -> m (Dynamic t (Map k a))
forall a b. (a -> b) -> a -> b
$ \k
k v
v Event t v
e -> Text -> Map Text Text -> m a -> m a
forall t (m :: * -> *) a.
DomBuilder t m =>
Text -> Map Text Text -> m a -> m a
elAttr Text
"div" (k -> Map Text Text
mkRow k
k) (m a -> m a) -> m a -> m a
forall a b. (a -> b) -> a -> b
$ k -> v -> Event t v -> m a
itemBuilder k
k v
v Event t v
e
Dynamic t Int
scrollPosition <- Int -> Event t Int -> m (Dynamic t Int)
forall k (t :: k) (m :: * -> *) a.
MonadHold t m =>
a -> Event t a -> m (Dynamic t a)
holdDyn Int
0 (Event t Int -> m (Dynamic t Int))
-> Event t Int -> m (Dynamic t Int)
forall a b. (a -> b) -> a -> b
$ [Event t Int] -> Event t Int
forall k (t :: k) a. Reflex t => [Event t a] -> Event t a
leftmost [ Double -> Int
forall a b. (RealFrac a, Integral b) => a -> b
round (Double -> Int) -> Event t Double -> Event t Int
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> EventName 'ScrollTag
-> Element EventResult GhcjsDomSpace t
-> Event
t (DomEventType (Element EventResult GhcjsDomSpace t) 'ScrollTag)
forall k (t :: k) target (eventName :: EventTag).
HasDomEvent t target eventName =>
EventName eventName
-> target -> Event t (DomEventType target eventName)
domEvent EventName 'ScrollTag
Scroll Element EventResult GhcjsDomSpace t
viewport
, (() -> Int) -> Event t () -> Event t Int
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Int -> () -> Int
forall a b. a -> b -> a
const (Int
i0 Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
rowPx)) Event t ()
pb
]
let window :: Dynamic t (Int, Int)
window = (Int -> Int -> (Int, Int))
-> Dynamic t Int -> Dynamic t Int -> Dynamic t (Int, Int)
forall k (t :: k) a b c.
Reflex t =>
(a -> b -> c) -> Dynamic t a -> Dynamic t b -> Dynamic t c
zipDynWith (Int -> Int -> Int -> (Int, Int)
forall b a. (Integral b, Integral a) => b -> b -> b -> (a, b)
findWindow Int
rowPx) Dynamic t Int
heightPx Dynamic t Int
scrollPosition
Event t (Performable m ()) -> m ()
forall t (m :: * -> *).
PerformEvent t m =>
Event t (Performable m ()) -> m ()
performEvent_ (Event t (Performable m ()) -> m ())
-> Event t (Performable m ()) -> m ()
forall a b. (a -> b) -> a -> b
$ Event t Int
-> (Int -> Performable m ()) -> Event t (Performable m ())
forall (f :: * -> *) a b. Functor f => f a -> (a -> b) -> f b
ffor ([Event t Int] -> Event t Int
forall k (t :: k) a. Reflex t => [Event t a] -> Event t a
leftmost [Event t Int
setI, Int
i0 Int -> Event t () -> Event t Int
forall (f :: * -> *) a b. Functor f => a -> f b -> f a
<$ Event t ()
pb]) ((Int -> Performable m ()) -> Event t (Performable m ()))
-> (Int -> Performable m ()) -> Event t (Performable m ())
forall a b. (a -> b) -> a -> b
$ \Int
i ->
Element -> Int -> Performable m ()
forall (m :: * -> *) self.
(MonadDOM m, IsElement self) =>
self -> Int -> m ()
setScrollTop (Element EventResult GhcjsDomSpace t -> RawElement GhcjsDomSpace
forall (er :: EventTag -> *) k1 (d :: k1) k2 (t :: k2).
Element er d t -> RawElement d
_element_raw Element EventResult GhcjsDomSpace t
viewport) (Int
i Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
rowPx)
Dynamic t (Int, Int)
uniqWindow <- Dynamic t (Int, Int) -> m (Dynamic t (Int, Int))
forall k (t :: k) (m :: * -> *) a.
(Reflex t, MonadHold t m, MonadFix m, Eq a) =>
Dynamic t a -> m (Dynamic t a)
holdUniqDyn Dynamic t (Int, Int)
window
(Dynamic t (Int, Int), Dynamic t (Map k a))
-> m (Dynamic t (Int, Int), Dynamic t (Map k a))
forall (m :: * -> *) a. Monad m => a -> m a
return (Dynamic t (Int, Int)
uniqWindow, Dynamic t (Map k a)
result)
where
toStyleAttr :: Map (IxValue m) (IxValue m) -> m
toStyleAttr Map (IxValue m) (IxValue m)
m = Index m
"style" Index m -> IxValue m -> m
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (IxValue m -> IxValue m -> IxValue m -> IxValue m)
-> IxValue m -> Map (IxValue m) (IxValue m) -> IxValue m
forall k a b. (k -> a -> b -> b) -> b -> Map k a -> b
Map.foldrWithKey (\IxValue m
k IxValue m
v IxValue m
s -> IxValue m
k IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
":" IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
v IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
";" IxValue m -> IxValue m -> IxValue m
forall a. Semigroup a => a -> a -> a
<> IxValue m
s) IxValue m
"" Map (IxValue m) (IxValue m)
m
mkViewport :: a -> m
mkViewport a
h = Map (IxValue m) (IxValue m) -> m
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue m) (IxValue m) -> m)
-> Map (IxValue m) (IxValue m) -> m
forall a b. (a -> b) -> a -> b
$ Index (Map (IxValue m) (IxValue m))
"overflow" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"auto" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"position" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"absolute" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<>
Index (Map (IxValue m) (IxValue m))
"left" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"0" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"right" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"0" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"height" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (a -> String
forall a. Show a => a -> String
show a
h) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px")
mkContainer :: a -> m
mkContainer a
h = Map (IxValue m) (IxValue m) -> m
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue m) (IxValue m) -> m)
-> Map (IxValue m) (IxValue m) -> m
forall a b. (a -> b) -> a -> b
$ Index (Map (IxValue m) (IxValue m))
"position" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map (IxValue m) (IxValue m))
"relative" Map (IxValue m) (IxValue m)
-> Map (IxValue m) (IxValue m) -> Map (IxValue m) (IxValue m)
forall a. Semigroup a => a -> a -> a
<> Index (Map (IxValue m) (IxValue m))
"height" Index (Map (IxValue m) (IxValue m))
-> IxValue (Map (IxValue m) (IxValue m))
-> Map (IxValue m) (IxValue m)
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (a -> String
forall a. Show a => a -> String
show a
h) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px")
mkVirtualHeight :: Int -> Map Text Text
mkVirtualHeight Int
h = let h' :: Int
h' = Int
h Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
rowPx
in Map (IxValue (Map Text Text)) (IxValue (Map Text Text))
-> Map Text Text
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue (Map Text Text)) (IxValue (Map Text Text))
-> Map Text Text)
-> Map (IxValue (Map Text Text)) (IxValue (Map Text Text))
-> Map Text Text
forall a b. (a -> b) -> a -> b
$ Index (Map Text Text)
"height" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (Int -> String
forall a. Show a => a -> String
show Int
h') Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px") Map Text Text -> Map Text Text -> Map Text Text
forall a. Semigroup a => a -> a -> a
<>
Index (Map Text Text)
"overflow" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map Text Text)
"hidden" Map Text Text -> Map Text Text -> Map Text Text
forall a. Semigroup a => a -> a -> a
<>
Index (Map Text Text)
"position" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map Text Text)
"relative"
mkRow :: k -> Map Text Text
mkRow k
k = Map (IxValue (Map Text Text)) (IxValue (Map Text Text))
-> Map Text Text
forall m.
(At m, Monoid m, IsString (Index m), IsString (IxValue m),
Semigroup (IxValue m)) =>
Map (IxValue m) (IxValue m) -> m
toStyleAttr (Map (IxValue (Map Text Text)) (IxValue (Map Text Text))
-> Map Text Text)
-> Map (IxValue (Map Text Text)) (IxValue (Map Text Text))
-> Map Text Text
forall a b. (a -> b) -> a -> b
$ Index (Map Text Text)
"height" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (String -> Text
T.pack (Int -> String
forall a. Show a => a -> String
show Int
rowPx) Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px") Map Text Text -> Map Text Text -> Map Text Text
forall a. Semigroup a => a -> a -> a
<>
Index (Map Text Text)
"top" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: (Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
"px") (String -> Text
T.pack (String -> Text) -> String -> Text
forall a b. (a -> b) -> a -> b
$ Int -> String
forall a. Show a => a -> String
show (Int -> String) -> Int -> String
forall a b. (a -> b) -> a -> b
$ k -> Int
keyToIndex k
k Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
rowPx) Map Text Text -> Map Text Text -> Map Text Text
forall a. Semigroup a => a -> a -> a
<>
Index (Map Text Text)
"position" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map Text Text)
"absolute" Map Text Text -> Map Text Text -> Map Text Text
forall a. Semigroup a => a -> a -> a
<>
Index (Map Text Text)
"width" Index (Map Text Text) -> IxValue (Map Text Text) -> Map Text Text
forall m. (At m, Monoid m) => Index m -> IxValue m -> m
=: IxValue (Map Text Text)
"100%"
findWindow :: b -> b -> b -> (a, b)
findWindow b
sizeIncrement b
windowSize b
startingPosition =
let (a
startingIndex, b
_) = b
startingPosition b -> b -> (a, b)
forall a b. (Real a, Integral b) => a -> a -> (b, a)
`divMod'` b
sizeIncrement
numItems :: b
numItems = (b
windowSize b -> b -> b
forall a. Num a => a -> a -> a
+ b
sizeIncrement b -> b -> b
forall a. Num a => a -> a -> a
- b
1) b -> b -> b
forall a. Integral a => a -> a -> a
`div` b
sizeIncrement
in (a
startingIndex, b
numItems)
virtualListBuffered
:: (DomBuilder t m, PostBuild t m, MonadHold t m, PerformEvent t m, MonadJSM (Performable m), DomBuilderSpace m ~ GhcjsDomSpace, MonadFix m, Ord k)
=> Int
-> Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> (k -> Int)
-> Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Event t (Int, Int), Dynamic t (Map k a))
virtualListBuffered :: Int
-> Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> (k -> Int)
-> Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Event t (Int, Int), Dynamic t (Map k a))
virtualListBuffered Int
buffer Dynamic t Int
heightPx Int
rowPx Dynamic t Int
maxIndex Int
i0 Event t Int
setI k -> Int
keyToIndex Map k v
items0 Event t (Map k (Maybe v))
itemsUpdate k -> v -> Event t v -> m a
itemBuilder = do
(Dynamic t (Int, Int)
win, Dynamic t (Map k a)
m) <- Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> (k -> Int)
-> Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Dynamic t (Int, Int), Dynamic t (Map k a))
forall t (m :: * -> *) k v a.
(DomBuilder t m, PostBuild t m, MonadHold t m, PerformEvent t m,
MonadJSM (Performable m), DomBuilderSpace m ~ GhcjsDomSpace,
MonadFix m, Ord k) =>
Dynamic t Int
-> Int
-> Dynamic t Int
-> Int
-> Event t Int
-> (k -> Int)
-> Map k v
-> Event t (Map k (Maybe v))
-> (k -> v -> Event t v -> m a)
-> m (Dynamic t (Int, Int), Dynamic t (Map k a))
virtualList Dynamic t Int
heightPx Int
rowPx Dynamic t Int
maxIndex Int
i0 Event t Int
setI k -> Int
keyToIndex Map k v
items0 Event t (Map k (Maybe v))
itemsUpdate k -> v -> Event t v -> m a
itemBuilder
Event t ()
pb <- m (Event t ())
forall t (m :: * -> *). PostBuild t m => m (Event t ())
getPostBuild
let extendWin :: Int -> Int -> (Int, Int)
extendWin Int
o Int
l = (Int -> Int -> Int
forall a. Ord a => a -> a -> a
max Int
0 (Int
o Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
l Int -> Int -> Int
forall a. Num a => a -> a -> a
* (Int
bufferInt -> Int -> Int
forall a. Num a => a -> a -> a
-Int
1) Int -> Int -> Int
forall a. Integral a => a -> a -> a
`div` Int
2), Int
l Int -> Int -> Int
forall a. Num a => a -> a -> a
* Int
buffer)
rec let winHitEdge :: Event t (Int, Int)
winHitEdge = ((Int, Int) -> (Int, Int) -> Maybe (Int, Int))
-> Behavior t (Int, Int)
-> Event t (Int, Int)
-> Event t (Int, Int)
forall k (t :: k) a b c.
Reflex t =>
(a -> b -> Maybe c) -> Behavior t a -> Event t b -> Event t c
attachWithMaybe (\(Int
oldOffset, Int
oldLimit) (Int
winOffset, Int
winLimit) ->
if Int
winOffset Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
> Int
oldOffset Bool -> Bool -> Bool
&& Int
winOffset Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
winLimit Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
< Int
oldOffset Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
oldLimit
then Maybe (Int, Int)
forall a. Maybe a
Nothing
else (Int, Int) -> Maybe (Int, Int)
forall a. a -> Maybe a
Just (Int -> Int -> (Int, Int)
extendWin Int
winOffset Int
winLimit)) (Dynamic t (Int, Int) -> Behavior t (Int, Int)
forall k (t :: k) a. Reflex t => Dynamic t a -> Behavior t a
current Dynamic t (Int, Int)
winBuffered) (Dynamic t (Int, Int) -> Event t (Int, Int)
forall k (t :: k) a. Reflex t => Dynamic t a -> Event t a
updated Dynamic t (Int, Int)
win)
Dynamic t (Int, Int)
winBuffered <- (Int, Int) -> Event t (Int, Int) -> m (Dynamic t (Int, Int))
forall k (t :: k) (m :: * -> *) a.
MonadHold t m =>
a -> Event t a -> m (Dynamic t a)
holdDyn (Int
0, Int
0) (Event t (Int, Int) -> m (Dynamic t (Int, Int)))
-> Event t (Int, Int) -> m (Dynamic t (Int, Int))
forall a b. (a -> b) -> a -> b
$ [Event t (Int, Int)] -> Event t (Int, Int)
forall k (t :: k) a. Reflex t => [Event t a] -> Event t a
leftmost [ Event t (Int, Int)
winHitEdge
, ((Int, Int) -> () -> (Int, Int))
-> Dynamic t (Int, Int) -> Event t () -> Event t (Int, Int)
forall k (t :: k) a b c.
Reflex t =>
(a -> b -> c) -> Dynamic t a -> Event t b -> Event t c
attachPromptlyDynWith (\(Int
x, Int
y) ()
_ -> Int -> Int -> (Int, Int)
extendWin Int
x Int
y) Dynamic t (Int, Int)
win Event t ()
pb
]
(Event t (Int, Int), Dynamic t (Map k a))
-> m (Event t (Int, Int), Dynamic t (Map k a))
forall (m :: * -> *) a. Monad m => a -> m a
return (Dynamic t (Int, Int) -> Event t (Int, Int)
forall k (t :: k) a. Reflex t => Dynamic t a -> Event t a
updated Dynamic t (Int, Int)
winBuffered, Dynamic t (Map k a)
m)