Safe Haskell	Safe
Language	Haskell2010

System.Console.Terminal.Size

Description

Get terminal window height and width without ncurses dependency

Based on answer by Andreas Hammar at http://stackoverflow.com/a/12807521/972985

Synopsis

data Window a = Window {
- height :: !a
- width :: !a
}
size :: Integral n => IO (Maybe (Window n))
fdSize :: Integral n => Fd -> IO (Maybe (Window n))
hSize :: Integral n => Handle -> IO (Maybe (Window n))

Documentation

data Window a Source #

Terminal window width and height

Constructors

Window
Fields height :: !a width :: !a

Instances

Functor Window Source #
Instance details Defined in System.Console.Terminal.Common Methods fmap :: (a -> b) -> Window a -> Window b (<$) :: a -> Window b -> Window a
Foldable Window Source #
Instance details Defined in System.Console.Terminal.Common Methods fold :: Monoid m => Window m -> m foldMap :: Monoid m => (a -> m) -> Window a -> m foldr :: (a -> b -> b) -> b -> Window a -> b foldr' :: (a -> b -> b) -> b -> Window a -> b foldl :: (b -> a -> b) -> b -> Window a -> b foldl' :: (b -> a -> b) -> b -> Window a -> b foldr1 :: (a -> a -> a) -> Window a -> a foldl1 :: (a -> a -> a) -> Window a -> a toList :: Window a -> [a] null :: Window a -> Bool length :: Window a -> Int elem :: Eq a => a -> Window a -> Bool maximum :: Ord a => Window a -> a minimum :: Ord a => Window a -> a sum :: Num a => Window a -> a product :: Num a => Window a -> a
Traversable Window Source #
Instance details Defined in System.Console.Terminal.Common Methods traverse :: Applicative f => (a -> f b) -> Window a -> f (Window b) sequenceA :: Applicative f => Window (f a) -> f (Window a) mapM :: Monad m => (a -> m b) -> Window a -> m (Window b) sequence :: Monad m => Window (m a) -> m (Window a)
Eq a => Eq (Window a) Source #
Instance details Defined in System.Console.Terminal.Common Methods (==) :: Window a -> Window a -> Bool (/=) :: Window a -> Window a -> Bool
Data a => Data (Window a) Source #
Instance details Defined in System.Console.Terminal.Common Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Window a -> c (Window a) gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Window a) toConstr :: Window a -> Constr dataTypeOf :: Window a -> DataType dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Window a)) dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Window a)) gmapT :: (forall b. Data b => b -> b) -> Window a -> Window a gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Window a -> r gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Window a -> r gmapQ :: (forall d. Data d => d -> u) -> Window a -> [u] gmapQi :: Int -> (forall d. Data d => d -> u) -> Window a -> u gmapM :: Monad m => (forall d. Data d => d -> m d) -> Window a -> m (Window a) gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Window a -> m (Window a) gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Window a -> m (Window a)
Read a => Read (Window a) Source #
Instance details Defined in System.Console.Terminal.Common Methods readsPrec :: Int -> ReadS (Window a) readList :: ReadS [Window a] readPrec :: ReadPrec (Window a) readListPrec :: ReadPrec [Window a]
Show a => Show (Window a) Source #
Instance details Defined in System.Console.Terminal.Common Methods showsPrec :: Int -> Window a -> ShowS show :: Window a -> String showList :: [Window a] -> ShowS
Generic (Window a) Source #
Instance details Defined in System.Console.Terminal.Common Associated Types type Rep (Window a) :: Type -> Type Methods from :: Window a -> Rep (Window a) x to :: Rep (Window a) x -> Window a
Generic1 Window Source #
Instance details Defined in System.Console.Terminal.Common Associated Types type Rep1 Window :: k -> Type Methods from1 :: Window a -> Rep1 Window a to1 :: Rep1 Window a -> Window a
type Rep (Window a) Source #
Instance details Defined in System.Console.Terminal.Common type Rep (Window a) = D1 (MetaData "Window" "System.Console.Terminal.Common" "terminal-size-0.3.2.1-Hh6hFaOyLfiJ6x0AenX2yY" False) (C1 (MetaCons "Window" PrefixI True) (S1 (MetaSel (Just "height") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 a) :*: S1 (MetaSel (Just "width") NoSourceUnpackedness SourceStrict DecidedStrict) (Rec0 a)))
type Rep1 Window Source #
Instance details Defined in System.Console.Terminal.Common type Rep1 Window = D1 (MetaData "Window" "System.Console.Terminal.Common" "terminal-size-0.3.2.1-Hh6hFaOyLfiJ6x0AenX2yY" False) (C1 (MetaCons "Window" PrefixI True) (S1 (MetaSel (Just "height") NoSourceUnpackedness SourceStrict DecidedStrict) Par1 :*: S1 (MetaSel (Just "width") NoSourceUnpackedness SourceStrict DecidedStrict) Par1))

size :: Integral n => IO (Maybe (Window n)) Source #

Get terminal window width and height for stdout.

>>> import System.Console.Terminal.Size
>>> size
Just (Window {height = 60, width = 112})

fdSize :: Integral n => Fd -> IO (Maybe (Window n)) Source #

Not available on Windows: Get terminal window width and height for a specified file descriptor. If it's not attached to a terminal then Nothing is returned.

>>> import System.Console.Terminal.Size
>>> import System.Posix
>>> fdSize stdOutput
Just (Window {height = 56, width = 85})
>>> fd <- openFd "foo" ReadWrite (Just stdFileMode) defaultFileFlags
>>> fdSize fd
Nothing

hSize :: Integral n => Handle -> IO (Maybe (Window n)) Source #

Not available on Windows: Same as fdSize, but takes Handle instead of Fd (file descriptor).

>>> import System.Console.Terminal.Size
>>> import System.IO
>>> hSize stdout
Just (Window {height = 56, width = 85})