54 lines
1.7 KiB
Haskell
54 lines
1.7 KiB
Haskell
{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE NoMonomorphismRestriction #-} -- FIXME remove
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-- | Provide the user with a rich text editor.
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module Yesod.Form.Nic
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( YesodNic (..)
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, nicHtmlField
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) where
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import Yesod.Handler
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import Yesod.Core (Route, ScriptLoadPosition(..), jsLoader, Yesod)
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import Yesod.Form
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import Yesod.Widget
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import Text.HTML.SanitizeXSS (sanitizeBalance)
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import Text.Hamlet (Html, shamlet)
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import Text.Julius (julius)
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import Text.Blaze.Renderer.String (renderHtml)
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import Text.Blaze (preEscapedText)
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import Data.Text (Text, pack)
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import Data.Maybe (listToMaybe)
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class Yesod a => YesodNic a where
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-- | NIC Editor Javascript file.
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urlNicEdit :: a -> Either (Route a) Text
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urlNicEdit _ = Right "http://js.nicedit.com/nicEdit-latest.js"
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nicHtmlField :: YesodNic master => Field sub master Html
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nicHtmlField = Field
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{ fieldParse = return . Right . fmap (preEscapedText . sanitizeBalance) . listToMaybe
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, fieldView = \theId name attrs val _isReq -> do
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toWidget [shamlet|
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<textarea id="#{theId}" *{attrs} name="#{name}" .html>#{showVal val}
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|]
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addScript' urlNicEdit
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master <- lift getYesod
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toWidget $
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case jsLoader master of
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BottomOfHeadBlocking -> [julius|
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bkLib.onDomLoaded(function(){new nicEditor({fullPanel:true}).panelInstance("#{theId}")});
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|]
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_ -> [julius|
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(function(){new nicEditor({fullPanel:true}).panelInstance("#{theId}")})();
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|]
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}
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where
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showVal = either id (pack . renderHtml)
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addScript' :: (y -> Either (Route y) Text) -> GWidget sub y ()
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addScript' f = do
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y <- lift getYesod
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addScriptEither $ f y
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