ansi-terminal-0.8.0.2: src/System/Console/ANSI/Windows/Foreign.hs
{-# OPTIONS_HADDOCK hide #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE DeriveDataTypeable #-}
-- | "System.Win32.Console" is really very impoverished, so I have had to do all
-- the FFI myself.
module System.Console.ANSI.Windows.Foreign
(
-- Re-exports from Win32.Types
BOOL, WORD, DWORD, WCHAR, HANDLE, iNVALID_HANDLE_VALUE, nullHANDLE, SHORT,
-- 'Re-exports from System.Win32.Console.Extra'
INPUT_RECORD (..), INPUT_RECORD_EVENT (..), kEY_EVENT,
KEY_EVENT_RECORD (..), UNICODE_ASCII_CHAR (..), writeConsoleInput,
getNumberOfConsoleInputEvents, readConsoleInput,
charToWCHAR, cWcharsToChars,
COORD(..), SMALL_RECT(..), rect_top, rect_bottom, rect_left, rect_right,
rect_width, rect_height, CONSOLE_CURSOR_INFO(..),
CONSOLE_SCREEN_BUFFER_INFO(..), CHAR_INFO(..),
sTD_INPUT_HANDLE, sTD_OUTPUT_HANDLE, sTD_ERROR_HANDLE,
eNABLE_VIRTUAL_TERMINAL_INPUT, eNABLE_VIRTUAL_TERMINAL_PROCESSING,
fOREGROUND_BLUE, fOREGROUND_GREEN, fOREGROUND_RED, fOREGROUND_INTENSITY,
fOREGROUND_WHITE, fOREGROUND_INTENSE_WHITE,
bACKGROUND_BLUE, bACKGROUND_GREEN, bACKGROUND_RED, bACKGROUND_INTENSITY,
bACKGROUND_WHITE, bACKGROUND_INTENSE_WHITE,
cOMMON_LVB_REVERSE_VIDEO, cOMMON_LVB_UNDERSCORE,
getStdHandle,
getConsoleScreenBufferInfo,
getConsoleCursorInfo,
getConsoleMode,
setConsoleTextAttribute,
setConsoleCursorPosition,
setConsoleCursorInfo,
setConsoleTitle,
setConsoleMode,
fillConsoleOutputAttribute,
fillConsoleOutputCharacter,
scrollConsoleScreenBuffer,
withTString, withHandleToHANDLE,
ConsoleException (..)
) where
#if !MIN_VERSION_base(4,8,0)
import Control.Applicative ((<$>), (<*>))
#endif
import Control.Exception (Exception, throw)
import Data.Bits ((.|.), shiftL)
import Data.Char (chr, ord)
import Data.Typeable (Typeable)
import Foreign.C.Types (CInt (..), CWchar (..))
import Foreign.Marshal (alloca, allocaArray, maybeWith, peekArray, with,
withArrayLen)
import Foreign.Ptr (Ptr, castPtr, plusPtr)
import Foreign.Storable (Storable (..))
-- `SHORT` and `withHandleToHANDLE` are not both available before Win32-2.5.1.0
import System.Win32.Compat (BOOL, DWORD, ErrCode, HANDLE, LPCTSTR, LPDWORD,
SHORT, TCHAR, UINT, WORD, failIfFalse_, getLastError, iNVALID_HANDLE_VALUE,
nullHANDLE, withHandleToHANDLE, withTString)
#if defined(i386_HOST_ARCH)
#define WINDOWS_CCONV stdcall
#elif defined(x86_64_HOST_ARCH)
#define WINDOWS_CCONV ccall
#else
#error Unknown mingw32 arch
#endif
type WCHAR = CWchar
charToWCHAR :: Char -> WCHAR
charToWCHAR char = fromIntegral (ord char)
-- This is a FFI hack. Some of the API calls take a Coord, but that isn't a
-- built-in FFI type so I can't use it directly. Instead, I use UNPACKED_COORD
-- and marshal COORDs into this manually. Note that we CAN'T just use two SHORTs
-- directly because they get expanded to 4 bytes each instead of just boing 2
-- lots of 2 bytes by the stdcall convention, so linking fails.
type UNPACKED_COORD = CInt
-- Field packing order determined experimentally: I couldn't immediately find a
-- specification for Windows struct layout anywhere.
unpackCOORD :: COORD -> UNPACKED_COORD
unpackCOORD (COORD x y)
= (fromIntegral y) `shiftL` (sizeOf x * 8) .|. (fromIntegral x)
peekAndOffset :: Storable a => Ptr a -> IO (a, Ptr b)
peekAndOffset ptr = do
item <- peek ptr
return (item, ptr `plusPtr` sizeOf item)
pokeAndOffset :: Storable a => Ptr a -> a -> IO (Ptr b)
pokeAndOffset ptr item = do
poke ptr item
return (ptr `plusPtr` sizeOf item)
data COORD = COORD
{ coord_x :: SHORT
, coord_y :: SHORT
} deriving (Read, Eq)
instance Show COORD where
show (COORD x y) = "(" ++ show x ++ ", " ++ show y ++ ")"
instance Storable COORD where
sizeOf ~(COORD x y) = sizeOf x + sizeOf y
alignment ~(COORD x _) = alignment x
peek ptr = do
let ptr' = castPtr ptr :: Ptr SHORT
x <- peekElemOff ptr' 0
y <- peekElemOff ptr' 1
return (COORD x y)
poke ptr (COORD x y) = do
let ptr' = castPtr ptr :: Ptr SHORT
pokeElemOff ptr' 0 x
pokeElemOff ptr' 1 y
data SMALL_RECT = SMALL_RECT
{ rect_top_left :: COORD
, rect_bottom_right :: COORD
}
rect_top, rect_left, rect_bottom, rect_right :: SMALL_RECT -> SHORT
rect_top = coord_y . rect_top_left
rect_left = coord_x . rect_top_left
rect_bottom = coord_y . rect_bottom_right
rect_right = coord_x . rect_bottom_right
rect_width, rect_height :: SMALL_RECT -> SHORT
rect_width rect = rect_right rect - rect_left rect + 1
rect_height rect = rect_bottom rect - rect_top rect + 1
instance Show SMALL_RECT where
show (SMALL_RECT tl br) = show tl ++ "-" ++ show br
instance Storable SMALL_RECT where
sizeOf ~(SMALL_RECT tl br) = sizeOf tl + sizeOf br
alignment ~(SMALL_RECT tl _) = alignment tl
peek ptr = do
let ptr' = castPtr ptr :: Ptr COORD
tl <- peekElemOff ptr' 0
br <- peekElemOff ptr' 1
return (SMALL_RECT tl br)
poke ptr (SMALL_RECT tl br) = do
let ptr' = castPtr ptr :: Ptr COORD
pokeElemOff ptr' 0 tl
pokeElemOff ptr' 1 br
data CONSOLE_CURSOR_INFO = CONSOLE_CURSOR_INFO
{ cci_cursor_size :: DWORD
, cci_cursor_visible :: BOOL
} deriving (Show)
instance Storable CONSOLE_CURSOR_INFO where
sizeOf ~(CONSOLE_CURSOR_INFO size visible) = sizeOf size + sizeOf visible
alignment ~(CONSOLE_CURSOR_INFO size _) = alignment size
peek ptr = do
(size, ptr') <- peekAndOffset (castPtr ptr)
visible <- peek ptr'
return (CONSOLE_CURSOR_INFO size visible)
poke ptr (CONSOLE_CURSOR_INFO size visible) = do
ptr' <- pokeAndOffset (castPtr ptr) size
poke ptr' visible
data CONSOLE_SCREEN_BUFFER_INFO = CONSOLE_SCREEN_BUFFER_INFO
{ csbi_size :: COORD
, csbi_cursor_position :: COORD
, csbi_attributes :: WORD
, csbi_window :: SMALL_RECT
, csbi_maximum_window_size :: COORD
} deriving (Show)
instance Storable CONSOLE_SCREEN_BUFFER_INFO where
sizeOf ~(CONSOLE_SCREEN_BUFFER_INFO
size cursor_position attributes window maximum_window_size)
= sizeOf size + sizeOf cursor_position + sizeOf attributes + sizeOf window
+ sizeOf maximum_window_size
alignment ~(CONSOLE_SCREEN_BUFFER_INFO size _ _ _ _) = alignment size
peek ptr = do
(size, ptr1) <- peekAndOffset (castPtr ptr)
(cursor_position, ptr2) <- peekAndOffset ptr1
(attributes, ptr3) <- peekAndOffset ptr2
(window, ptr4) <- peekAndOffset ptr3
maximum_window_size <- peek ptr4
return (CONSOLE_SCREEN_BUFFER_INFO
size cursor_position attributes window maximum_window_size)
poke ptr (CONSOLE_SCREEN_BUFFER_INFO
size cursor_position attributes window maximum_window_size)
= do
ptr1 <- pokeAndOffset (castPtr ptr) size
ptr2 <- pokeAndOffset ptr1 cursor_position
ptr3 <- pokeAndOffset ptr2 attributes
ptr4 <- pokeAndOffset ptr3 window
poke ptr4 maximum_window_size
data CHAR_INFO = CHAR_INFO
{ ci_char :: WCHAR
, ci_attributes :: WORD
} deriving (Show)
instance Storable CHAR_INFO where
sizeOf ~(CHAR_INFO char attributes) = sizeOf char + sizeOf attributes
alignment ~(CHAR_INFO char _) = alignment char
peek ptr = do
(char, ptr') <- peekAndOffset (castPtr ptr)
attributes <- peek ptr'
return (CHAR_INFO char attributes)
poke ptr (CHAR_INFO char attributes) = do
ptr' <- pokeAndOffset (castPtr ptr) char
poke ptr' attributes
eNABLE_VIRTUAL_TERMINAL_INPUT, eNABLE_VIRTUAL_TERMINAL_PROCESSING :: DWORD
sTD_INPUT_HANDLE, sTD_OUTPUT_HANDLE, sTD_ERROR_HANDLE :: DWORD
eNABLE_VIRTUAL_TERMINAL_INPUT = 512
eNABLE_VIRTUAL_TERMINAL_PROCESSING = 4
sTD_INPUT_HANDLE = 0xFFFFFFF6 -- minus 10
sTD_OUTPUT_HANDLE = 0xFFFFFFF5 -- minus 11
sTD_ERROR_HANDLE = 0xFFFFFFF4 -- minus 12
fOREGROUND_BLUE, fOREGROUND_GREEN, fOREGROUND_RED, fOREGROUND_INTENSITY,
bACKGROUND_BLUE, bACKGROUND_GREEN, bACKGROUND_RED, bACKGROUND_INTENSITY,
cOMMON_LVB_REVERSE_VIDEO, cOMMON_LVB_UNDERSCORE :: WORD
fOREGROUND_BLUE = 0x1
fOREGROUND_GREEN = 0x2
fOREGROUND_RED = 0x4
fOREGROUND_INTENSITY = 0x8
bACKGROUND_BLUE = 0x10
bACKGROUND_GREEN = 0x20
bACKGROUND_RED = 0x40
bACKGROUND_INTENSITY = 0x80
cOMMON_LVB_REVERSE_VIDEO = 0x4000
cOMMON_LVB_UNDERSCORE = 0x8000
fOREGROUND_WHITE, bACKGROUND_WHITE, fOREGROUND_INTENSE_WHITE,
bACKGROUND_INTENSE_WHITE :: WORD
fOREGROUND_WHITE = fOREGROUND_RED .|. fOREGROUND_GREEN .|. fOREGROUND_BLUE
bACKGROUND_WHITE = bACKGROUND_RED .|. bACKGROUND_GREEN .|. bACKGROUND_BLUE
fOREGROUND_INTENSE_WHITE = fOREGROUND_WHITE .|. fOREGROUND_INTENSITY
bACKGROUND_INTENSE_WHITE = bACKGROUND_WHITE .|. bACKGROUND_INTENSITY
kEY_EVENT, mOUSE_EVENT, wINDOW_BUFFER_SIZE_EVENT, mENU_EVENT,
fOCUS_EVENT :: WORD
kEY_EVENT = 1
mOUSE_EVENT = 2
wINDOW_BUFFER_SIZE_EVENT = 4
mENU_EVENT = 8
fOCUS_EVENT = 16
foreign import WINDOWS_CCONV unsafe "windows.h GetStdHandle"
getStdHandle :: DWORD -> IO HANDLE
foreign import WINDOWS_CCONV unsafe "windows.h GetConsoleScreenBufferInfo"
cGetConsoleScreenBufferInfo :: HANDLE
-> Ptr CONSOLE_SCREEN_BUFFER_INFO
-> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h GetConsoleCursorInfo"
cGetConsoleCursorInfo :: HANDLE -> Ptr CONSOLE_CURSOR_INFO -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h GetConsoleMode"
cGetConsoleMode :: HANDLE -> Ptr DWORD -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h SetConsoleTextAttribute"
cSetConsoleTextAttribute :: HANDLE -> WORD -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h SetConsoleCursorPosition"
cSetConsoleCursorPosition :: HANDLE -> UNPACKED_COORD -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h SetConsoleCursorInfo"
cSetConsoleCursorInfo :: HANDLE -> Ptr CONSOLE_CURSOR_INFO -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h SetConsoleTitleW"
cSetConsoleTitle :: LPCTSTR -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h SetConsoleMode"
cSetConsoleMode :: HANDLE -> DWORD -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h FillConsoleOutputAttribute"
cFillConsoleOutputAttribute :: HANDLE
-> WORD
-> DWORD
-> UNPACKED_COORD
-> Ptr DWORD
-> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h FillConsoleOutputCharacterW"
cFillConsoleOutputCharacter :: HANDLE
-> TCHAR
-> DWORD
-> UNPACKED_COORD
-> Ptr DWORD
-> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h ScrollConsoleScreenBufferW"
cScrollConsoleScreenBuffer :: HANDLE
-> Ptr SMALL_RECT
-> Ptr SMALL_RECT
-> UNPACKED_COORD
-> Ptr CHAR_INFO
-> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h WriteConsoleInputW"
cWriteConsoleInput :: HANDLE
-> Ptr INPUT_RECORD
-> DWORD
-> LPDWORD
-> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h GetNumberOfConsoleInputEvents"
cGetNumberOfConsoleInputEvents :: HANDLE -> Ptr DWORD -> IO BOOL
foreign import WINDOWS_CCONV unsafe "windows.h ReadConsoleInputW"
cReadConsoleInput :: HANDLE
-> Ptr INPUT_RECORD
-> DWORD
-> LPDWORD
-> IO BOOL
data ConsoleException = ConsoleException !ErrCode deriving (Eq, Typeable)
instance Show ConsoleException where
show (ConsoleException 6) =
"A fatal error has occurred.\n\n" ++
"An attempt has been made to send console virtual terminal sequences\n" ++
"(ANSI codes) to an output that has not been recognised as an\n" ++
"ANSI-capable terminal and also cannot be emulated as an ANSI-enabled\n" ++
"terminal (emulation needs a ConHost-based terminal, such as Command\n" ++
"Prompt or PowerShell). That may occur, for example, if output has\n" ++
"been redirected to a file.\n\n" ++
"If that is unexpected, please post an issue at:\n" ++
"https://github.com/feuerbach/ansi-terminal/issues\n"
show (ConsoleException errCode) = "ConsoleException " ++ show errCode
instance Exception ConsoleException
throwIfFalse :: IO Bool -> IO ()
throwIfFalse action = do
succeeded <- action
if not succeeded
then getLastError >>= throw . ConsoleException -- TODO: Check if last error
-- is zero for some instructable reason (?)
else return ()
getConsoleScreenBufferInfo :: HANDLE -> IO CONSOLE_SCREEN_BUFFER_INFO
getConsoleScreenBufferInfo handle
= alloca $ \ptr_console_screen_buffer_info -> do
throwIfFalse $
cGetConsoleScreenBufferInfo handle ptr_console_screen_buffer_info
peek ptr_console_screen_buffer_info
getConsoleCursorInfo :: HANDLE -> IO CONSOLE_CURSOR_INFO
getConsoleCursorInfo handle = alloca $ \ptr_console_cursor_info -> do
throwIfFalse $ cGetConsoleCursorInfo handle ptr_console_cursor_info
peek ptr_console_cursor_info
getConsoleMode :: HANDLE -> IO DWORD
getConsoleMode handle = alloca $ \ptr_mode -> do
throwIfFalse $ cGetConsoleMode handle ptr_mode
peek ptr_mode
setConsoleTextAttribute :: HANDLE -> WORD -> IO ()
setConsoleTextAttribute handle attributes
= throwIfFalse $ cSetConsoleTextAttribute handle attributes
setConsoleCursorPosition :: HANDLE -> COORD -> IO ()
setConsoleCursorPosition handle cursor_position
= throwIfFalse $ cSetConsoleCursorPosition handle
(unpackCOORD cursor_position)
setConsoleCursorInfo :: HANDLE -> CONSOLE_CURSOR_INFO -> IO ()
setConsoleCursorInfo handle console_cursor_info
= with console_cursor_info $ \ptr_console_cursor_info -> do
throwIfFalse $ cSetConsoleCursorInfo handle ptr_console_cursor_info
setConsoleTitle :: LPCTSTR -> IO ()
setConsoleTitle title = throwIfFalse $ cSetConsoleTitle title
setConsoleMode :: HANDLE -> DWORD -> IO ()
setConsoleMode handle attributes
= throwIfFalse $ cSetConsoleMode handle attributes
fillConsoleOutputAttribute :: HANDLE -> WORD -> DWORD -> COORD -> IO DWORD
fillConsoleOutputAttribute handle attribute fill_length write_origin
= alloca $ \ptr_chars_written -> do
throwIfFalse $ cFillConsoleOutputAttribute handle attribute
fill_length (unpackCOORD write_origin) ptr_chars_written
peek ptr_chars_written
fillConsoleOutputCharacter :: HANDLE -> TCHAR -> DWORD -> COORD -> IO DWORD
fillConsoleOutputCharacter handle char fill_length write_origin
= alloca $ \ptr_chars_written -> do
throwIfFalse $ cFillConsoleOutputCharacter handle char fill_length
(unpackCOORD write_origin) ptr_chars_written
peek ptr_chars_written
scrollConsoleScreenBuffer :: HANDLE
-> SMALL_RECT
-> Maybe SMALL_RECT
-> COORD
-> CHAR_INFO
-> IO ()
scrollConsoleScreenBuffer
handle scroll_rectangle mb_clip_rectangle destination_origin fill
= with scroll_rectangle $ \ptr_scroll_rectangle ->
maybeWith with mb_clip_rectangle $ \ptr_clip_rectangle ->
with fill $ \ptr_fill ->
throwIfFalse $ cScrollConsoleScreenBuffer handle ptr_scroll_rectangle
ptr_clip_rectangle (unpackCOORD destination_origin) ptr_fill
-- The following is based on module System.Win32.Console.Extra from package
-- Win32-console, cut down for the WCHAR version of writeConsoleInput.
writeConsoleInput :: HANDLE -> [INPUT_RECORD] -> IO DWORD
writeConsoleInput hdl evs
= writeConsoleInputWith hdl $ \act ->
withArrayLen evs $ \len ptr ->
act (ptr, toEnum len)
writeConsoleInputWith :: HANDLE
-> InputHandler (Ptr INPUT_RECORD, DWORD)
-> IO DWORD
writeConsoleInputWith hdl withBuffer
= returnWith_ $ \ptrN ->
withBuffer $ \(ptrBuf, len) ->
failIfFalse_ "WriteConsoleInputW" $ cWriteConsoleInput hdl ptrBuf len ptrN
returnWith_ :: Storable a => (Ptr a -> IO b) -> IO a
returnWith_ act = alloca $ \ptr -> act ptr >> peek ptr
type InputHandler i = forall a. (i -> IO a) -> IO a
{-
typedef union _UNICODE_ASCII_CHAR {
WCHAR UnicodeChar;
CHAR AsciiChar;
} UNICODE_ASCII_CHAR;
-}
newtype UNICODE_ASCII_CHAR = UnicodeAsciiChar
{ unicodeAsciiChar :: WCHAR
} deriving (Show, Read, Eq)
instance Storable UNICODE_ASCII_CHAR where
sizeOf _ = 2
alignment _ = 2
peek ptr = UnicodeAsciiChar <$> (`peekByteOff` 0) ptr
poke ptr val = case val of
UnicodeAsciiChar c -> (`pokeByteOff` 0) ptr c
{-
typedef struct _KEY_EVENT_RECORD {
BOOL bKeyDown;
WORD wRepeatCount;
WORD wVirtualKeyCode;
WORD wVirtualScanCode;
union {
WCHAR UnicodeChar;
CHAR AsciiChar;
} uChar;
DWORD dwControlKeyState;
}
#ifdef __GNUC__
/* gcc's alignment is not what win32 expects */
PACKED
#endif
KEY_EVENT_RECORD;
-}
data KEY_EVENT_RECORD = KEY_EVENT_RECORD
{ keyEventKeyDown :: BOOL
, keyEventRepeatCount :: WORD
, keyEventVirtualKeyCode :: WORD
, keyEventVirtualScanCode :: WORD
, keyEventChar :: UNICODE_ASCII_CHAR
, keyEventControlKeystate :: DWORD
} deriving (Show, Read, Eq)
instance Storable KEY_EVENT_RECORD where
sizeOf _ = 16
alignment _ = 4
peek ptr = KEY_EVENT_RECORD <$> (`peekByteOff` 0) ptr
<*> (`peekByteOff` 4) ptr
<*> (`peekByteOff` 6) ptr
<*> (`peekByteOff` 8) ptr
<*> (`peekByteOff` 10) ptr
<*> (`peekByteOff` 12) ptr
poke ptr val = do
(`pokeByteOff` 0) ptr $ keyEventKeyDown val
(`pokeByteOff` 4) ptr $ keyEventRepeatCount val
(`pokeByteOff` 6) ptr $ keyEventVirtualKeyCode val
(`pokeByteOff` 8) ptr $ keyEventVirtualScanCode val
(`pokeByteOff` 10) ptr $ keyEventChar val
(`pokeByteOff` 12) ptr $ keyEventControlKeystate val
{-
typedef struct _MOUSE_EVENT_RECORD {
COORD dwMousePosition;
DWORD dwButtonState;
DWORD dwControlKeyState;
DWORD dwEventFlags;
} MOUSE_EVENT_RECORD;
-}
data MOUSE_EVENT_RECORD = MOUSE_EVENT_RECORD
{ mousePosition :: COORD
, mouseButtonState :: DWORD
, mouseControlKeyState :: DWORD
, mouseEventFlags :: DWORD
} deriving (Show, Read, Eq)
instance Storable MOUSE_EVENT_RECORD where
sizeOf _ = 16
alignment _ = 4
peek ptr = MOUSE_EVENT_RECORD <$> (`peekByteOff` 0) ptr
<*> (`peekByteOff` 4) ptr
<*> (`peekByteOff` 8) ptr
<*> (`peekByteOff` 12) ptr
poke ptr val = do
(`pokeByteOff` 0) ptr $ mousePosition val
(`pokeByteOff` 4) ptr $ mouseButtonState val
(`pokeByteOff` 8) ptr $ mouseControlKeyState val
(`pokeByteOff` 12) ptr $ mouseEventFlags val
{-
typedef struct _WINDOW_BUFFER_SIZE_RECORD {
COORD dwSize;
} WINDOW_BUFFER_SIZE_RECORD;
-}
data WINDOW_BUFFER_SIZE_RECORD = WINDOW_BUFFER_SIZE_RECORD
{ bufSizeNew :: COORD
} deriving (Show, Read, Eq)
instance Storable WINDOW_BUFFER_SIZE_RECORD where
sizeOf _ = 4
alignment _ = 4
peek ptr = WINDOW_BUFFER_SIZE_RECORD <$> (`peekByteOff` 0) ptr
poke ptr val = (`pokeByteOff` 0) ptr $ bufSizeNew val
{-
typedef struct _MENU_EVENT_RECORD {
UINT dwCommandId;
} MENU_EVENT_RECORD,*PMENU_EVENT_RECORD;
-}
data MENU_EVENT_RECORD = MENU_EVENT_RECORD
{ menuCommandId :: UINT
} deriving (Show, Read, Eq)
instance Storable MENU_EVENT_RECORD where
sizeOf _ = 4
alignment _ = 4
peek ptr = MENU_EVENT_RECORD <$> (`peekByteOff` 0) ptr
poke ptr val = (`pokeByteOff` 0) ptr $ menuCommandId val
{-
typedef struct _FOCUS_EVENT_RECORD { BOOL bSetFocus; } FOCUS_EVENT_RECORD;
-}
data FOCUS_EVENT_RECORD = FOCUS_EVENT_RECORD
{ focusSetFocus :: BOOL
} deriving (Show, Read, Eq)
instance Storable FOCUS_EVENT_RECORD where
sizeOf _ = 4
alignment _ = 4
peek ptr = FOCUS_EVENT_RECORD <$> (`peekByteOff` 0) ptr
poke ptr val = (`pokeByteOff` 0) ptr $ focusSetFocus val
data INPUT_RECORD_EVENT
= InputKeyEvent KEY_EVENT_RECORD
| InputMouseEvent MOUSE_EVENT_RECORD
| InputWindowBufferSizeEvent WINDOW_BUFFER_SIZE_RECORD
| InputMenuEvent MENU_EVENT_RECORD
| InputFocusEvent FOCUS_EVENT_RECORD
deriving (Show, Read, Eq)
{-
typedef struct _INPUT_RECORD {
WORD EventType;
union {
KEY_EVENT_RECORD KeyEvent;
MOUSE_EVENT_RECORD MouseEvent;
WINDOW_BUFFER_SIZE_RECORD WindowBufferSizeEvent;
MENU_EVENT_RECORD MenuEvent;
FOCUS_EVENT_RECORD FocusEvent;
} Event;
} INPUT_RECORD,*PINPUT_RECORD;
-}
data INPUT_RECORD = INPUT_RECORD
{ inputEventType :: WORD
, inputEvent :: INPUT_RECORD_EVENT
} deriving (Show, Read, Eq)
instance Storable INPUT_RECORD where
sizeOf _ = 20
alignment _ = 4
peek ptr = do
evType <- (`peekByteOff` 0) ptr
event <- case evType of
_ | evType == kEY_EVENT
-> InputKeyEvent <$> (`peekByteOff` 4) ptr
_ | evType == mOUSE_EVENT
-> InputMouseEvent <$> (`peekByteOff` 4) ptr
_ | evType == wINDOW_BUFFER_SIZE_EVENT
-> InputWindowBufferSizeEvent <$> (`peekByteOff` 4) ptr
_ | evType == mENU_EVENT
-> InputMenuEvent <$> (`peekByteOff` 4) ptr
_ | evType == fOCUS_EVENT
-> InputFocusEvent <$> (`peekByteOff` 4) ptr
_ -> error $ "peek (INPUT_RECORD): Unknown event type " ++
show evType
return $ INPUT_RECORD evType event
poke ptr val = do
(`pokeByteOff` 0) ptr $ inputEventType val
case inputEvent val of
InputKeyEvent ev -> (`pokeByteOff` 4) ptr ev
InputMouseEvent ev -> (`pokeByteOff` 4) ptr ev
InputWindowBufferSizeEvent ev -> (`pokeByteOff` 4) ptr ev
InputMenuEvent ev -> (`pokeByteOff` 4) ptr ev
InputFocusEvent ev -> (`pokeByteOff` 4) ptr ev
-- The following is based on module System.Win32.Console.Extra from package
-- Win32-console.
getNumberOfConsoleInputEvents :: HANDLE -> IO DWORD
getNumberOfConsoleInputEvents hdl =
returnWith_ $ \ptrN ->
failIfFalse_ "GetNumberOfConsoleInputEvents" $
cGetNumberOfConsoleInputEvents hdl ptrN
-- The following is based on module System.Win32.Console.Extra from package
-- Win32-console, cut down for the WCHAR version of readConsoleInput.
readConsoleInput :: HANDLE -> DWORD -> IO [INPUT_RECORD]
readConsoleInput hdl len
= readConsoleInputWith hdl len $ \(ptr, n) -> peekArray (fromEnum n) ptr
readConsoleInputWith :: HANDLE
-> DWORD
-> OutputHandler (Ptr INPUT_RECORD, DWORD)
readConsoleInputWith hdl len handler =
allocaArray (fromEnum len) $ \ptrBuf ->
alloca $ \ptrN -> do
failIfFalse_ "ReadConsoleInputW" $
cReadConsoleInput hdl ptrBuf len ptrN
n <- peek ptrN
handler (ptrBuf, n)
type OutputHandler o = forall a. (o -> IO a) -> IO a
-- Replicated from module Foreign.C.String in package base because that module
-- does not export the function.
cWcharsToChars :: [CWchar] -> [Char]
cWcharsToChars = map chr . fromUTF16 . map fromIntegral
where
fromUTF16 (c1:c2:wcs)
| 0xd800 <= c1 && c1 <= 0xdbff && 0xdc00 <= c2 && c2 <= 0xdfff =
((c1 - 0xd800)*0x400 + (c2 - 0xdc00) + 0x10000) : fromUTF16 wcs
fromUTF16 (c:wcs) = c : fromUTF16 wcs
fromUTF16 [] = []