aabb126d63
Move shakespeare specific stuff to Yesod.Shakespeare I have not bothered to make Yesod.Shakespeare compile yet The dependency chain is now Yesod.Core -> Yesod.Widget -> Yesod.Shakespeare
527 lines
20 KiB
Haskell
527 lines
20 KiB
Haskell
{-# OPTIONS_GHC -fno-warn-orphans #-}
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{-# LANGUAGE ConstraintKinds #-}
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{-# LANGUAGE GeneralizedNewtypeDeriving #-}
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{-# LANGUAGE TupleSections #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE TemplateHaskell #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE TypeSynonymInstances #-}
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{-# LANGUAGE UndecidableInstances #-}
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{-# LANGUAGE CPP #-}
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-- | Widgets combine HTML with JS and CSS dependencies with a unique identifier
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-- generator, allowing you to create truly modular HTML components.
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module Yesod.Core.Widget
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( -- * Datatype
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WidgetT(..)
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, PageContent (..)
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-- * Convert to Widget
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, ToWidget (..)
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, ToWidgetHead (..)
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, ToWidgetBody (..)
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, ToWidgetMedia (..)
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-- * Creating
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-- ** Head of page
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, setTitle
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-- ** CSS
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, addStylesheet
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, addStylesheetAttrs
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, addStylesheetRemote
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, addStylesheetRemoteAttrs
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, addStylesheetEither
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, CssBuilder (..)
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-- ** Javascript
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, addScript
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, addScriptAttrs
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, addScriptRemote
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, addScriptRemoteAttrs
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, addScriptEither
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-- * Subsites
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, widgetToParentWidget
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, handlerToWidget
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-- * Internal
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, asWidgetT
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-- * Formerly Yesod.Core.Types
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, ScriptLoadPosition(..)
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, BottomOfHeadAsync
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, GWData(..)
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, Head(..)
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, Body(..)
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-- * Formerly Yesod.Core.Class.Handler
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-- * Formerly Yesod.Core.Handler
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-- ** Streaming
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, sendChunkHtml
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-- ** Messages
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, setMessage
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, getMessage
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-- ** Hamlet
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, hamletToRepHtml
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-- * Formerly Yesod.Core.Json
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-- FIXME
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-- , defaultLayoutJson
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-- * Formerly Yesod.Core
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, MonadWidget (..)
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) where
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import Control.Applicative (Applicative(..))
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import Control.Monad (liftM, ap, forM)
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import Control.Monad.Base (MonadBase (liftBase))
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import Control.Monad.Catch (MonadCatch (..))
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import Control.Monad.Catch (MonadMask (..))
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import Control.Monad.Logger (MonadLogger (..))
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#if MIN_VERSION_monad_logger(0, 3, 10)
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import Control.Monad.Logger (MonadLoggerIO (..))
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#endif
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import Control.Monad.Reader (MonadReader (..))
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import Control.Monad.Trans.Class (MonadTrans (..))
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import Control.Monad.Trans.Control (MonadBaseControl (..))
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import Control.Monad.Trans.Resource (MonadResourceBase, MonadResource (..), runInternalState, MonadThrow (..))
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import Control.Monad.Trans.Identity ( IdentityT)
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import Control.Monad.Trans.List ( ListT )
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import Control.Monad.Trans.Maybe ( MaybeT )
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import Control.Monad.Trans.Error ( ErrorT, Error)
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import Control.Monad.Trans.Reader ( ReaderT )
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import Control.Monad.Trans.State ( StateT )
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import Control.Monad.Trans.Writer ( WriterT )
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import Control.Monad.Trans.RWS ( RWST )
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import qualified Control.Monad.Trans.RWS.Strict as Strict ( RWST )
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import qualified Control.Monad.Trans.State.Strict as Strict ( StateT )
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import qualified Control.Monad.Trans.Writer.Strict as Strict ( WriterT )
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import qualified Data.ByteString.Lazy as L
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import Blaze.ByteString.Builder (Builder)
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import Data.Conduit (Flush (Chunk), Producer, ConduitM)
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import Data.Conduit.Internal (Pipe(..))
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import Data.Conduit.Lazy (MonadActive, monadActive)
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import Data.List (foldl', nub)
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import Data.Monoid
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import Data.Semigroup (Semigroup)
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import qualified Data.Text as T
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import qualified Text.Blaze.Html.Renderer.Text as RenderText
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import Text.Blaze.Html (preEscapedToMarkup, toHtml, Html)
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import qualified Text.Blaze.Html5 as H
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import Text.Blaze.Html.Renderer.Utf8 (renderHtmlBuilder)
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import Yesod.Routes.Class
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import Control.Monad.IO.Class (MonadIO, liftIO)
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import Data.Text (Text)
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import qualified Data.Map as Map
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import Language.Haskell.TH.Quote (QuasiQuoter)
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import Language.Haskell.TH.Syntax (Q, Exp (InfixE, VarE, LamE, AppE), Pat (VarP), newName)
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import Data.Text.Lazy.Builder (fromLazyText, toLazyText)
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import System.Log.FastLogger (toLogStr)
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import qualified Data.Text.Lazy as TL
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import Data.Text.Lazy.Encoding (encodeUtf8)
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import Yesod.Core.Types
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import Yesod.Core.Class.Handler
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import Yesod.Core.Class.Yesod (Yesod)
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import Yesod.Core.Handler (getUrlRenderParams, toTextUrl, invalidArgs, permissionDenied, setSession, lookupSession, deleteSession, RedirectUrl, withUrlRenderer, sendChunk, getRequest, getYesod, sendResponse, selectRep, provideRep)
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import Yesod.Core.Content (ToContent(..), ToTypedContent(..), HasContentType(..), ToFlushBuilder(..), typeJavascript, typeHtml, typeCss)
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import Data.Map (Map, unionWith)
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import qualified Data.Aeson as J
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-- templating types
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class ToWidgetBuilder a where
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toWidgetBuilder :: a -> Builder
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type Render url = url -> [(Text, Text)] -> Text
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type Translate msg = msg -> Html
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type HtmlUrl url = Render url -> Html
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type HtmlUrlI18n msg url = Translate msg -> Render url -> Html
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------------------------------------
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-- Original Yesod.Core.Widget
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------------------------------------
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preEscapedLazyText :: TL.Text -> Html
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preEscapedLazyText = preEscapedToMarkup
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class ToWidget site a where
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toWidget :: (MonadWidget m, HandlerSite m ~ site) => a -> m ()
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instance render ~ RY site => ToWidget site (render -> Html) where
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toWidget x = tell $ GWData (Body x) mempty mempty mempty mempty mempty mempty
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instance render ~ RY site => ToWidget site (render -> CssBuilder) where
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toWidget x = tell $ GWData mempty mempty mempty mempty (Map.singleton Nothing $ unCssBuilder . x) mempty mempty
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instance ToWidget site CssBuilder where
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toWidget x = tell $ GWData mempty mempty mempty mempty (Map.singleton Nothing $ unCssBuilder . const x) mempty mempty
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instance (site' ~ site, IO ~ m, a ~ ()) => ToWidget site' (WidgetT site m a) where
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toWidget = liftWidgetT
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instance ToWidget site Html where
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toWidget = toWidget . const
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-- | Allows adding some CSS to the page with a specific media type.
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--
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-- Since 1.2
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class ToWidgetMedia site a where
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-- | Add the given content to the page, but only for the given media type.
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--
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-- Since 1.2
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toWidgetMedia :: (MonadWidget m, HandlerSite m ~ site)
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=> Text -- ^ media value
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-> a
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-> m ()
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instance render ~ RY site => ToWidgetMedia site (render -> CssBuilder) where
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toWidgetMedia media x = tell $ GWData mempty mempty mempty mempty (Map.singleton (Just media) $ unCssBuilder . x) mempty mempty
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instance ToWidgetMedia site CssBuilder where
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toWidgetMedia media x = tell $ GWData mempty mempty mempty mempty (Map.singleton (Just media) $ unCssBuilder . const x) mempty mempty
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class ToWidgetBody site a where
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toWidgetBody :: (MonadWidget m, HandlerSite m ~ site) => a -> m ()
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instance render ~ RY site => ToWidgetBody site (render -> Html) where
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toWidgetBody = toWidget
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instance ToWidgetBody site Html where
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toWidgetBody = toWidget
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class ToWidgetHead site a where
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toWidgetHead :: (MonadWidget m, HandlerSite m ~ site) => a -> m ()
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instance render ~ RY site => ToWidgetHead site (render -> Html) where
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toWidgetHead = tell . GWData mempty mempty mempty mempty mempty mempty . Head
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-- | Set the page title. Calling 'setTitle' multiple times overrides previously
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-- set values.
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setTitle :: MonadWidget m => Html -> m ()
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setTitle x = tell $ GWData mempty (Last $ Just $ Title x) mempty mempty mempty mempty mempty
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-- | Link to the specified local stylesheet.
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addStylesheet :: MonadWidget m => Route (HandlerSite m) -> m ()
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addStylesheet = flip addStylesheetAttrs []
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-- | Link to the specified local stylesheet.
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addStylesheetAttrs :: MonadWidget m
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=> Route (HandlerSite m)
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-> [(Text, Text)]
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-> m ()
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addStylesheetAttrs x y = tell $ GWData mempty mempty mempty (toUnique $ Stylesheet (Local x) y) mempty mempty mempty
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-- | Link to the specified remote stylesheet.
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addStylesheetRemote :: MonadWidget m => Text -> m ()
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addStylesheetRemote = flip addStylesheetRemoteAttrs []
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-- | Link to the specified remote stylesheet.
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addStylesheetRemoteAttrs :: MonadWidget m => Text -> [(Text, Text)] -> m ()
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addStylesheetRemoteAttrs x y = tell $ GWData mempty mempty mempty (toUnique $ Stylesheet (Remote x) y) mempty mempty mempty
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addStylesheetEither :: MonadWidget m
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=> Either (Route (HandlerSite m)) Text
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-> m ()
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addStylesheetEither = either addStylesheet addStylesheetRemote
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addScriptEither :: MonadWidget m
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=> Either (Route (HandlerSite m)) Text
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-> m ()
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addScriptEither = either addScript addScriptRemote
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-- | Link to the specified local script.
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addScript :: MonadWidget m => Route (HandlerSite m) -> m ()
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addScript = flip addScriptAttrs []
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-- | Link to the specified local script.
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addScriptAttrs :: MonadWidget m => Route (HandlerSite m) -> [(Text, Text)] -> m ()
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addScriptAttrs x y = tell $ GWData mempty mempty (toUnique $ Script (Local x) y) mempty mempty mempty mempty
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-- | Link to the specified remote script.
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addScriptRemote :: MonadWidget m => Text -> m ()
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addScriptRemote = flip addScriptRemoteAttrs []
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-- | Link to the specified remote script.
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addScriptRemoteAttrs :: MonadWidget m => Text -> [(Text, Text)] -> m ()
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addScriptRemoteAttrs x y = tell $ GWData mempty mempty (toUnique $ Script (Remote x) y) mempty mempty mempty mempty
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tell :: MonadWidget m => GWData (Route (HandlerSite m)) -> m ()
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tell w = liftWidgetT $ WidgetT $ const $ return ((), w)
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toUnique :: x -> UniqueList x
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toUnique = UniqueList . (:)
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handlerToWidget :: Monad m => HandlerT site m a -> WidgetT site m a
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handlerToWidget (HandlerT f) = WidgetT $ liftM (, mempty) . f
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widgetToParentWidget :: MonadIO m
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=> WidgetT child IO a
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-> HandlerT child (HandlerT parent m) (WidgetT parent m a)
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widgetToParentWidget (WidgetT f) = HandlerT $ \hd -> do
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(a, gwd) <- liftIO $ f hd { handlerToParent = const () }
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return $ WidgetT $ const $ return (a, liftGWD (handlerToParent hd) gwd)
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liftGWD :: (child -> parent) -> GWData child -> GWData parent
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liftGWD tp gwd = GWData
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{ gwdBody = fixBody $ gwdBody gwd
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, gwdTitle = gwdTitle gwd
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, gwdScripts = fixUnique fixScript $ gwdScripts gwd
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, gwdStylesheets = fixUnique fixStyle $ gwdStylesheets gwd
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, gwdCss = fmap fixCss $ gwdCss gwd
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, gwdJavascript = fmap fixJS $ gwdJavascript gwd
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, gwdHead = fixHead $ gwdHead gwd
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}
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where
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fixRender f route params = f (tp route) params
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fixBody (Body h) = Body $ h . fixRender
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fixHead (Head h) = Head $ h . fixRender
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fixUnique go (UniqueList f) = UniqueList (map go (f []) ++)
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fixScript (Script loc attrs) = Script (fixLoc loc) attrs
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fixStyle (Stylesheet loc attrs) = Stylesheet (fixLoc loc) attrs
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fixLoc (Local url) = Local $ tp url
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fixLoc (Remote t) = Remote t
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fixCss f = f . fixRender
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fixJS f = f . fixRender
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------------------------------------
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-- Formerly Yesod.Core.Types
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------------------------------------
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data GWData a = GWData
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{ gwdBody :: !(Body a)
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, gwdTitle :: !(Last Title)
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, gwdScripts :: !(UniqueList (Script a))
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, gwdStylesheets :: !(UniqueList (Stylesheet a))
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, gwdCss :: !(Map (Maybe Text) (CssBuilderUrl a)) -- media type
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, gwdJavascript :: !(Maybe (BuilderUrl a))
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, gwdHead :: !(Head a)
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}
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instance Monoid (GWData a) where
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mempty = GWData mempty mempty mempty mempty mempty mempty mempty
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mappend (GWData a1 a2 a3 a4 a5 a6 a7)
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(GWData b1 b2 b3 b4 b5 b6 b7) = GWData
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(a1 `mappend` b1)
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(a2 `mappend` b2)
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(a3 `mappend` b3)
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(a4 `mappend` b4)
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(unionWith mappend a5 b5)
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(a6 `mappend` b6)
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(a7 `mappend` b7)
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instance Semigroup (GWData a)
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-- Instances for WidgetT
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instance Monad m => Functor (WidgetT site m) where
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fmap = liftM
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instance Monad m => Applicative (WidgetT site m) where
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pure = return
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(<*>) = ap
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instance Monad m => Monad (WidgetT site m) where
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return a = WidgetT $ const $ return (a, mempty)
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WidgetT x >>= f = WidgetT $ \r -> do
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(a, wa) <- x r
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(b, wb) <- unWidgetT (f a) r
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return (b, wa `mappend` wb)
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instance MonadIO m => MonadIO (WidgetT site m) where
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liftIO = lift . liftIO
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instance MonadBase b m => MonadBase b (WidgetT site m) where
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liftBase = WidgetT . const . liftBase . fmap (, mempty)
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instance MonadBaseControl b m => MonadBaseControl b (WidgetT site m) where
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#if MIN_VERSION_monad_control(1,0,0)
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type StM (WidgetT site m) a = StM m (a, GWData (Route site))
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liftBaseWith f = WidgetT $ \reader' ->
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liftBaseWith $ \runInBase ->
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liftM (\x -> (x, mempty))
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(f $ runInBase . flip unWidgetT reader')
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restoreM = WidgetT . const . restoreM
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#else
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data StM (WidgetT site m) a = StW (StM m (a, GWData (Route site)))
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liftBaseWith f = WidgetT $ \reader' ->
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liftBaseWith $ \runInBase ->
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liftM (\x -> (x, mempty))
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(f $ liftM StW . runInBase . flip unWidgetT reader')
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restoreM (StW base) = WidgetT $ const $ restoreM base
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#endif
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instance Monad m => MonadReader site (WidgetT site m) where
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ask = WidgetT $ \hd -> return (rheSite $ handlerEnv hd, mempty)
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local f (WidgetT g) = WidgetT $ \hd -> g hd
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{ handlerEnv = (handlerEnv hd)
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{ rheSite = f $ rheSite $ handlerEnv hd
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}
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}
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instance MonadTrans (WidgetT site) where
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lift = WidgetT . const . liftM (, mempty)
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instance MonadThrow m => MonadThrow (WidgetT site m) where
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throwM = lift . throwM
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instance MonadCatch m => MonadCatch (WidgetT site m) where
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catch (WidgetT m) c = WidgetT $ \r -> m r `catch` \e -> unWidgetT (c e) r
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instance MonadMask m => MonadMask (WidgetT site m) where
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mask a = WidgetT $ \e -> mask $ \u -> unWidgetT (a $ q u) e
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where q u (WidgetT b) = WidgetT (u . b)
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uninterruptibleMask a =
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WidgetT $ \e -> uninterruptibleMask $ \u -> unWidgetT (a $ q u) e
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where q u (WidgetT b) = WidgetT (u . b)
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instance (Applicative m, MonadIO m, MonadBase IO m, MonadThrow m) => MonadResource (WidgetT site m) where
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liftResourceT f = WidgetT $ \hd -> liftIO $ fmap (, mempty) $ runInternalState f (handlerResource hd)
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instance MonadIO m => MonadLogger (WidgetT site m) where
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monadLoggerLog a b c d = WidgetT $ \hd ->
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liftIO $ fmap (, mempty) $ rheLog (handlerEnv hd) a b c (toLogStr d)
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#if MIN_VERSION_monad_logger(0, 3, 10)
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instance MonadIO m => MonadLoggerIO (WidgetT site m) where
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askLoggerIO = WidgetT $ \hd -> return (rheLog (handlerEnv hd), mempty)
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#endif
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instance MonadActive m => MonadActive (WidgetT site m) where
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monadActive = lift monadActive
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data ScriptLoadPosition master
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= BottomOfBody
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| BottomOfHeadBlocking
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| BottomOfHeadAsync (BottomOfHeadAsync master)
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type BottomOfHeadAsync master
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= [Text] -- ^ urls to load asynchronously
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-> Maybe (HtmlUrl (Route master)) -- ^ widget of js to run on async completion
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-> (HtmlUrl (Route master)) -- ^ widget to insert at the bottom of <head>
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-- | A generic widget, allowing specification of both the subsite and master
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-- site datatypes. While this is simply a @WriterT@, we define a newtype for
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-- better error messages.
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newtype WidgetT site m a = WidgetT
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{ unWidgetT :: HandlerData site (MonadRoute m) -> m (a, GWData (Route site))
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}
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instance (a ~ (), Monad m) => Monoid (WidgetT site m a) where
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mempty = return ()
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mappend x y = x >> y
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instance (a ~ (), Monad m) => Semigroup (WidgetT site m a)
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asWidgetT :: WidgetT site m () -> WidgetT site m ()
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asWidgetT = id
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-- | Content for a web page. By providing this datatype, we can easily create
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-- generic site templates, which would have the type signature:
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--
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-- > PageContent url -> HtmlUrl url
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data PageContent url = PageContent
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{ pageTitle :: Html
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, pageHead :: HtmlUrl url
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, pageBody :: HtmlUrl url
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}
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newtype Head url = Head (HtmlUrl url)
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deriving Monoid
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instance Semigroup (Head a)
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newtype Body url = Body (HtmlUrl url)
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deriving Monoid
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instance Semigroup (Body a)
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------------------------------------
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-- Formerly Yesod.Core.Content
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------------------------------------
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instance ToContent Html where
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toContent bs = ContentBuilder (renderHtmlBuilder bs) Nothing
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instance ToTypedContent Html where
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toTypedContent h = TypedContent typeHtml (toContent h)
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instance ToFlushBuilder (Flush Html) where toFlushBuilder = fmap renderHtmlBuilder
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instance ToFlushBuilder Html where toFlushBuilder = Chunk . renderHtmlBuilder
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instance HasContentType Html where
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getContentType _ = typeHtml
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------------------------------------
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-- Formerly Yesod.Core.Class.Handler
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------------------------------------
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replaceToParent :: HandlerData site route -> HandlerData site ()
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replaceToParent hd = hd { handlerToParent = const () }
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instance MonadResourceBase m => MonadHandler (WidgetT site m) where
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type HandlerSite (WidgetT site m) = site
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liftHandlerT (HandlerT f) = WidgetT $ liftIO . liftM (, mempty) . f . replaceToParent
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{-# RULES "liftHandlerT (WidgetT site IO)" forall f. liftHandlerT (HandlerT f) = WidgetT $ liftM (, mempty) . f #-}
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class MonadHandler m => MonadWidget m where
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liftWidgetT :: WidgetT (HandlerSite m) IO a -> m a
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instance MonadResourceBase m => MonadWidget (WidgetT site m) where
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liftWidgetT (WidgetT f) = WidgetT $ liftIO . f . replaceToParent
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#define GO(T) instance MonadWidget m => MonadWidget (T m) where liftWidgetT = lift . liftWidgetT
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#define GOX(X, T) instance (X, MonadWidget m) => MonadWidget (T m) where liftWidgetT = lift . liftWidgetT
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GO(IdentityT)
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GO(ListT)
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GO(MaybeT)
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GOX(Error e, ErrorT e)
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GO(ReaderT r)
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GO(StateT s)
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GOX(Monoid w, WriterT w)
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GOX(Monoid w, RWST r w s)
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GOX(Monoid w, Strict.RWST r w s)
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GO(Strict.StateT s)
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GOX(Monoid w, Strict.WriterT w)
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GO(Pipe l i o u)
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GO(ConduitM i o)
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#undef GO
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#undef GOX
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------------------------------------
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-- Formerly Yesod.Core.Handler
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------------------------------------
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msgKey :: Text
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msgKey = T.pack "_MSG"
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-- | Sets a message in the user's session.
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--
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-- See 'getMessage'.
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setMessage :: MonadHandler m => Html -> m ()
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setMessage = setSession msgKey . T.concat . TL.toChunks . RenderText.renderHtml
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-- | Gets the message in the user's session, if available, and then clears the
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-- variable.
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--
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-- See 'setMessage'.
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getMessage :: MonadHandler m => m (Maybe Html)
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getMessage = do
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mmsg <- liftM (fmap preEscapedToMarkup) $ lookupSession msgKey
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deleteSession msgKey
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return mmsg
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-- | Wraps the 'Content' generated by 'hamletToContent' in a 'RepHtml'.
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hamletToRepHtml :: MonadHandler m => HtmlUrl (Route (HandlerSite m)) -> m Html
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hamletToRepHtml = withUrlRenderer
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{-# DEPRECATED hamletToRepHtml "Use withUrlRenderer instead" #-}
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-- | Type-specialized version of 'sendChunk' for @Html@s.
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--
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-- Since 1.2.0
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sendChunkHtml :: Monad m => Html -> Producer m (Flush Builder)
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sendChunkHtml = sendChunk
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-----------------------------
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-- originally from Yesod.Core.Json
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-----------------------------
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-- | Provide both an HTML and JSON representation for a piece of
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-- data, using the default layout for the HTML output
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-- ('defaultLayout').
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--
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-- /Since: 0.3.0/
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{- FIXME
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defaultLayoutJson :: (Yesod site, J.ToJSON a)
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=> WidgetT site IO () -- ^ HTML
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-> HandlerT site IO a -- ^ JSON
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-> HandlerT site IO TypedContent
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defaultLayoutJson w json = selectRep $ do
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provideRep $ defaultLayout w
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provideRep $ fmap J.toJSON json
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-}
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