1 files changed, 27 insertions, 0 deletions
diff --git a/src/System/IO/Terminal/Input/Key.hs b/src/System/IO/Terminal/Input/Key.hs
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+++ b/src/System/IO/Terminal/Input/Key.hs
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+{-|
+Module      : System.IO.Terminal.Input.Key
+Copyright   : (c) UU, 2019
+License     : MIT
+Maintainer  : Tom Smeding
+Stability   : experimental
+Portability : POSIX, macOS, Windows
+-}
+module System.IO.Terminal.Input.Key where
+
+
+-- | A keypress. This does not attempt to model all possible keypresses
+-- that the user may enter, since not all can be recognised in the terminal
+-- anyway. The argument to 'KInvalid' contains some description of the
+-- unknown key.
+data Key = KChar Char
+         | KUp | KDown | KRight | KLeft
+         | KEnter | KDelete | KBackspace
+         | KPageDown | KPageUp | KHome | KEnd
+         | KTab
+         | KEsc
+         | KMod { kShift :: Bool
+                , kCtrl :: Bool
+                , kAlt :: Bool
+                , kKey :: Key }
+         | KInvalid String
+  deriving (Eq, Ord, Show)