{-# LANGUAGE OverloadedStrings #-}
module Ide.Plugin.Floskell
( descriptor
, provider
) where
import Control.Monad.IO.Class
import qualified Data.Text as T
import qualified Data.Text.Lazy as TL
import qualified Data.Text.Lazy.Encoding as TL
import Development.IDE hiding (pluginHandlers)
import Floskell
import Ide.PluginUtils
import Ide.Types
import Language.LSP.Types
-- ---------------------------------------------------------------------
descriptor :: PluginId -> PluginDescriptor IdeState
descriptor plId = (defaultPluginDescriptor plId)
{ pluginHandlers = mkFormattingHandlers provider
}
-- ---------------------------------------------------------------------
-- | Format provider of Floskell.
-- Formats the given source in either a given Range or the whole Document.
-- If the provider fails an error is returned that can be displayed to the user.
provider :: FormattingHandler IdeState
provider _ideState typ contents fp _ = liftIO $ do
let file = fromNormalizedFilePath fp
config <- findConfigOrDefault file
let (range, selectedContents) = case typ of
FormatText -> (fullRange contents, contents)
FormatRange r -> (normalize r, extractRange r contents)
result = reformat config (Just file) . TL.encodeUtf8 $ TL.fromStrict selectedContents
case result of
Left err -> pure $ Left $ responseError $ T.pack $ "floskellCmd: " ++ err
Right new -> pure $ Right $ List [TextEdit range . TL.toStrict $ TL.decodeUtf8 new]
-- | Find Floskell Config, user and system wide or provides a default style.
-- Every directory of the filepath will be searched to find a user configuration.
-- Also looks into places such as XDG_CONFIG_DIRECTORY<https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html>.
-- This function may not throw an exception and returns a default config.
findConfigOrDefault :: FilePath -> IO AppConfig
findConfigOrDefault file = do
mbConf <- findAppConfigIn file
case mbConf of
Just confFile -> readAppConfig confFile
Nothing ->
let gibiansky = head (filter (\s -> styleName s == "gibiansky") styles)
in pure $ defaultAppConfig { appStyle = gibiansky }
-- ---------------------------------------------------------------------