522203f812
All of this code will be included in a separate yesod-form package to allow for more flexibility in API changes, plus to make it more natural to swap in other packages such as digestive-functors.
190 lines
7.1 KiB
Haskell
190 lines
7.1 KiB
Haskell
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
|
|
{-# LANGUAGE FlexibleContexts #-}
|
|
{-# LANGUAGE PackageImports #-}
|
|
{-# LANGUAGE FlexibleInstances #-}
|
|
{-# LANGUAGE TypeFamilies #-}
|
|
-- | Widgets combine HTML with JS and CSS dependencies with a unique identifier
|
|
-- generator, allowing you to create truly modular HTML components.
|
|
module Yesod.Widget
|
|
( -- * Datatype
|
|
GWidget (..)
|
|
, liftHandler
|
|
-- * Creating
|
|
-- ** Head of page
|
|
, setTitle
|
|
, addHamletHead
|
|
, addHtmlHead
|
|
-- ** Body
|
|
, addHamlet
|
|
, addHtml
|
|
, addWidget
|
|
, addSubWidget
|
|
-- ** CSS
|
|
, addCassius
|
|
, addStylesheet
|
|
, addStylesheetRemote
|
|
, addStylesheetEither
|
|
-- ** Javascript
|
|
, addJulius
|
|
, addScript
|
|
, addScriptRemote
|
|
, addScriptEither
|
|
-- * Utilities
|
|
, extractBody
|
|
, newIdent
|
|
) where
|
|
|
|
import Data.Monoid
|
|
import Control.Monad.Trans.Writer
|
|
import Control.Monad.Trans.State
|
|
import Text.Hamlet
|
|
import Text.Cassius
|
|
import Text.Julius
|
|
import Yesod.Handler (Route, GHandler, YesodSubRoute(..), toMasterHandlerMaybe, getYesod)
|
|
import Control.Applicative (Applicative)
|
|
import Control.Monad.IO.Class (MonadIO)
|
|
import Control.Monad.Trans.Class (lift)
|
|
import Yesod.Internal
|
|
|
|
import Control.Monad.IO.Peel (MonadPeelIO)
|
|
|
|
-- | A generic widget, allowing specification of both the subsite and master
|
|
-- site datatypes. This is basically a large 'WriterT' stack keeping track of
|
|
-- dependencies along with a 'StateT' to track unique identifiers.
|
|
newtype GWidget s m a = GWidget { unGWidget :: GWInner s m a }
|
|
deriving (Functor, Applicative, Monad, MonadIO, MonadPeelIO)
|
|
type GWInner sub master =
|
|
WriterT (Body (Route master)) (
|
|
WriterT (Last Title) (
|
|
WriterT (UniqueList (Script (Route master))) (
|
|
WriterT (UniqueList (Stylesheet (Route master))) (
|
|
WriterT (Maybe (Cassius (Route master))) (
|
|
WriterT (Maybe (Julius (Route master))) (
|
|
WriterT (Head (Route master)) (
|
|
StateT Int (
|
|
GHandler sub master
|
|
))))))))
|
|
instance Monoid (GWidget sub master ()) where
|
|
mempty = return ()
|
|
mappend x y = x >> y
|
|
|
|
instance HamletValue (GWidget s m ()) where
|
|
newtype HamletMonad (GWidget s m ()) a =
|
|
GWidget' { runGWidget' :: GWidget s m a }
|
|
type HamletUrl (GWidget s m ()) = Route m
|
|
toHamletValue = runGWidget'
|
|
htmlToHamletMonad = GWidget' . addHtml
|
|
urlToHamletMonad url params = GWidget' $
|
|
addHamlet $ \r -> preEscapedString (r url params)
|
|
fromHamletValue = GWidget'
|
|
instance Monad (HamletMonad (GWidget s m ())) where
|
|
return = GWidget' . return
|
|
x >>= y = GWidget' $ runGWidget' x >>= runGWidget' . y
|
|
|
|
-- | Lift an action in the 'GHandler' monad into an action in the 'GWidget'
|
|
-- monad.
|
|
liftHandler :: GHandler sub master a -> GWidget sub master a
|
|
liftHandler = GWidget . lift . lift . lift . lift . lift . lift . lift . lift
|
|
|
|
addSubWidget :: (YesodSubRoute sub master) => sub -> GWidget sub master a -> GWidget sub' master a
|
|
addSubWidget sub w = do master <- liftHandler getYesod
|
|
let sr = fromSubRoute sub master
|
|
i <- GWidget $ lift $ lift $ lift $ lift $ lift $ lift $ lift get
|
|
w' <- liftHandler $ toMasterHandlerMaybe sr (const sub) Nothing $ flip runStateT i
|
|
$ runWriterT $ runWriterT $ runWriterT $ runWriterT
|
|
$ runWriterT $ runWriterT $ runWriterT
|
|
$ unGWidget w
|
|
let ((((((((a,
|
|
body),
|
|
title),
|
|
scripts),
|
|
stylesheets),
|
|
style),
|
|
jscript),
|
|
h),
|
|
i') = w'
|
|
GWidget $ do
|
|
tell body
|
|
lift $ tell title
|
|
lift $ lift $ tell scripts
|
|
lift $ lift $ lift $ tell stylesheets
|
|
lift $ lift $ lift $ lift $ tell style
|
|
lift $ lift $ lift $ lift $ lift $ tell jscript
|
|
lift $ lift $ lift $ lift $ lift $ lift $ tell h
|
|
lift $ lift $ lift $ lift $ lift $ lift $ lift $ put i'
|
|
return a
|
|
|
|
-- | Set the page title. Calling 'setTitle' multiple times overrides previously
|
|
-- set values.
|
|
setTitle :: Html -> GWidget sub master ()
|
|
setTitle = GWidget . lift . tell . Last . Just . Title
|
|
|
|
-- | Add a 'Hamlet' to the head tag.
|
|
addHamletHead :: Hamlet (Route master) -> GWidget sub master ()
|
|
addHamletHead = GWidget . lift . lift . lift . lift . lift . lift . tell . Head
|
|
|
|
-- | Add a 'Html' to the head tag.
|
|
addHtmlHead :: Html -> GWidget sub master ()
|
|
addHtmlHead = GWidget . lift . lift . lift . lift . lift . lift . tell . Head . const
|
|
|
|
-- | Add a 'Hamlet' to the body tag.
|
|
addHamlet :: Hamlet (Route master) -> GWidget sub master ()
|
|
addHamlet = GWidget . tell . Body
|
|
|
|
-- | Add a 'Html' to the body tag.
|
|
addHtml :: Html -> GWidget sub master ()
|
|
addHtml = GWidget . tell . Body . const
|
|
|
|
-- | Add another widget. This is defined as 'id', by can help with types, and
|
|
-- makes widget blocks look more consistent.
|
|
addWidget :: GWidget s m () -> GWidget s m ()
|
|
addWidget = id
|
|
|
|
-- | Get a unique identifier.
|
|
newIdent :: GWidget sub master String
|
|
newIdent = GWidget $ lift $ lift $ lift $ lift $ lift $ lift $ lift $ do
|
|
i <- get
|
|
let i' = i + 1
|
|
put i'
|
|
return $ "w" ++ show i'
|
|
|
|
-- | Add some raw CSS to the style tag.
|
|
addCassius :: Cassius (Route master) -> GWidget sub master ()
|
|
addCassius = GWidget . lift . lift . lift . lift . tell . Just
|
|
|
|
-- | Link to the specified local stylesheet.
|
|
addStylesheet :: Route master -> GWidget sub master ()
|
|
addStylesheet = GWidget . lift . lift . lift . tell . toUnique . Stylesheet . Local
|
|
|
|
-- | Link to the specified remote stylesheet.
|
|
addStylesheetRemote :: String -> GWidget sub master ()
|
|
addStylesheetRemote =
|
|
GWidget . lift . lift . lift . tell . toUnique . Stylesheet . Remote
|
|
|
|
addStylesheetEither :: Either (Route master) String -> GWidget sub master ()
|
|
addStylesheetEither = either addStylesheet addStylesheetRemote
|
|
|
|
addScriptEither :: Either (Route master) String -> GWidget sub master ()
|
|
addScriptEither = either addScript addScriptRemote
|
|
|
|
-- | Link to the specified local script.
|
|
addScript :: Route master -> GWidget sub master ()
|
|
addScript = GWidget . lift . lift . tell . toUnique . Script . Local
|
|
|
|
-- | Link to the specified remote script.
|
|
addScriptRemote :: String -> GWidget sub master ()
|
|
addScriptRemote =
|
|
GWidget . lift . lift . tell . toUnique . Script . Remote
|
|
|
|
-- | Include raw Javascript in the page's script tag.
|
|
addJulius :: Julius (Route master) -> GWidget sub master ()
|
|
addJulius = GWidget . lift . lift . lift . lift . lift. tell . Just
|
|
|
|
-- | Pull out the HTML tag contents and return it. Useful for performing some
|
|
-- manipulations. It can be easier to use this sometimes than 'wrapWidget'.
|
|
extractBody :: GWidget s m () -> GWidget s m (Hamlet (Route m))
|
|
extractBody (GWidget w) =
|
|
GWidget $ mapWriterT (fmap go) w
|
|
where
|
|
go ((), Body h) = (h, Body mempty)
|