module Yi.Keymap.Vim.Ex.Commands.Help (parse) where
import Control.Monad
import Control.Applicative
import Yi.Command.Help (displayHelpFor)
import qualified Data.Text as T
import qualified Text.ParserCombinators.Parsec as P
import Yi.Keymap
import Yi.Keymap.Vim.Common
import qualified Yi.Keymap.Vim.Ex.Commands.Common as Common
import Yi.Keymap.Vim.Ex.Types
parse :: EventString -> Maybe ExCommand
parse = Common.parse $ do
void $ P.string "help"
cmd <- P.option "" $ P.try $ do
void $ P.many1 P.space
T.pack <$> P.many1 P.anyChar
return $! Common.impureExCommand {
cmdAction = YiA $ displayHelpFor cmd
, cmdShow = "help" `T.append`
if cmd == ""
then ""
else " " `T.append` cmd
}