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add getInputChar' which reads any character not just printable #190

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add getInputChar' which reads any character not just printable #190

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15 changes: 15 additions & 0 deletions System/Console/Haskeline.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ module System.Console.Haskeline(
getInputLine,
getInputLineWithInitial,
getInputChar,
getInputChar',
getPassword,
waitForAnyKey,
-- ** Outputting text
Expand Down Expand Up @@ -232,6 +233,20 @@ acceptOneChar = choiceCmd [useChar $ \c s -> change (insertChar c) s
keyCommand acceptOneChar
, ctrlChar 'd' +> failCmd]

{- | Reads one character of input, including non-printable.
-}
getInputChar' :: (MonadIO m, MonadMask m) => String -- ^ The input prompt
-> InputT m (Maybe Char)
getInputChar' = promptedInput getInputCmdChar' $
runMaybeT . getLocaleChar

getInputCmdChar' :: (MonadIO m, MonadMask m) => TermOps -> Prefix -> InputT m (Maybe Char)
getInputCmdChar' tops prefix = runInputCmdT tops
$ runCommandLoop tops prefix acceptOneChar' emptyIM

acceptOneChar' :: Monad m => KeyCommand m InsertMode (Maybe Char)
acceptOneChar' = useChar' $ \c _s -> return (Just c)

----------
{- | Waits for one key to be pressed, then returns. Ignores the value
of the specific key.
Expand Down
7 changes: 7 additions & 0 deletions System/Console/Haskeline/Command.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ module System.Console.Haskeline.Command(
changeFromChar,
(+>),
useChar,
useChar',
choiceCmd,
keyChoiceCmd,
keyChoiceCmdM,
Expand Down Expand Up @@ -97,6 +98,12 @@ useChar act = KeyMap $ \k -> case k of
-> Just $ Consumed (act c)
_ -> Nothing

useChar' :: (Char -> Command m s t) -> KeyCommand m s t
useChar' act = KeyMap $ \k -> case k of
Key _m (KeyChar c)
-> Just $ Consumed (act c)
_ -> Nothing

withoutConsuming :: Command m s t -> KeyCommand m s t
withoutConsuming = KeyMap . const . Just . NotConsumed

Expand Down