80 lines
2.3 KiB
Haskell
80 lines
2.3 KiB
Haskell
-- ghc-mod: Happy Haskell Hacking
|
|
-- Copyright (C) 2015 Nikolay Yakimov <root@livid.pp.ru>
|
|
--
|
|
-- This program is free software: you can redistribute it and/or modify
|
|
-- it under the terms of the GNU Affero General Public License as published by
|
|
-- the Free Software Foundation, either version 3 of the License, or
|
|
-- (at your option) any later version.
|
|
--
|
|
-- This program is distributed in the hope that it will be useful,
|
|
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
-- GNU Affero General Public License for more details.
|
|
--
|
|
-- You should have received a copy of the GNU Affero General Public License
|
|
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
{-# LANGUAGE OverloadedStrings, FlexibleInstances, GeneralizedNewtypeDeriving #-}
|
|
|
|
module Language.Haskell.GhcMod.Options.Help where
|
|
|
|
import Options.Applicative
|
|
import Options.Applicative.Help.Pretty (Doc)
|
|
import qualified Options.Applicative.Help.Pretty as PP
|
|
import Control.Monad.State
|
|
import GHC.Exts( IsString(..) )
|
|
import Data.Maybe
|
|
import Data.Monoid
|
|
import Prelude
|
|
|
|
newtype MyDocM s a = MyDoc {unwrapState :: State s a}
|
|
deriving (Monad, Functor, Applicative, MonadState s)
|
|
type MyDoc = MyDocM (Maybe Doc) ()
|
|
|
|
instance IsString (MyDocM (Maybe Doc) a) where
|
|
fromString = append . para
|
|
|
|
instance Monoid (MyDocM (Maybe Doc) ()) where
|
|
mappend a b = append $ doc a <> doc b
|
|
mempty = append PP.empty
|
|
|
|
para :: String -> Doc
|
|
para = PP.fillSep . map PP.text . words
|
|
|
|
append :: Doc -> MyDocM (Maybe Doc) a
|
|
append s = modify m >> return undefined
|
|
where
|
|
m :: Maybe Doc -> Maybe Doc
|
|
m Nothing = Just s
|
|
m (Just old) = Just $ old PP..$. s
|
|
|
|
infixr 7 \\
|
|
(\\) :: MyDoc -> MyDoc -> MyDoc
|
|
(\\) a b = append $ doc a PP.<+> doc b
|
|
|
|
doc :: MyDoc -> Doc
|
|
doc = fromMaybe PP.empty . flip execState Nothing . unwrapState
|
|
|
|
help' :: MyDoc -> Mod f a
|
|
help' = helpDoc . Just . doc
|
|
|
|
desc :: MyDoc -> InfoMod a
|
|
desc = footerDoc . Just . doc . indent 2
|
|
|
|
code :: MyDoc -> MyDoc
|
|
code x = do
|
|
_ <- " "
|
|
indent 4 x
|
|
" "
|
|
|
|
progDesc' :: MyDoc -> InfoMod a
|
|
progDesc' = progDescDoc . Just . doc
|
|
|
|
indent :: Int -> MyDoc -> MyDoc
|
|
indent n = append . PP.indent n . doc
|
|
|
|
int' :: Int -> MyDoc
|
|
int' = append . PP.int
|
|
|
|
para' :: String -> MyDoc
|
|
para' = append . para
|