41 lines
1.3 KiB
Haskell
41 lines
1.3 KiB
Haskell
|
module SendXMsg (sendXMsg, splitXMsg) where
|
||
|
|
|
||
|
|
import Data.Char
|
||
|
|
|
||
|
|
import Graphics.X11.Types
|
||
|
|
import Graphics.X11.Xlib.Atom
|
||
|
|
import Graphics.X11.Xlib.Display
|
||
|
|
import Graphics.X11.Xlib.Event
|
||
|
|
import Graphics.X11.Xlib.Extras
|
||
|
|
|
||
|
|
sendXMsg :: String -> String -> IO ()
|
||
|
|
sendXMsg magic tag = do
|
||
|
|
dpy <- openDisplay ""
|
||
|
|
root <- rootWindow dpy $ defaultScreen dpy
|
||
|
|
allocaXEvent $ \e -> do
|
||
|
|
setEventType e clientMessage
|
||
|
|
-- NOTE: This function is written such that the penultimate
|
||
|
|
-- argument represents the first 40 bits of the 160 bit data
|
||
|
|
-- field, and it also only takes a decimal digit, which means the
|
||
|
|
-- string to be stored in the data field needs to be converted to
|
||
|
|
-- its decimal equivalent. The penultimate argument will be used
|
||
|
|
-- for the magic string and the last will be used for the tag.
|
||
|
|
setClientMessageEvent e root bITMAP 8 m t
|
||
|
|
sendEvent dpy root False substructureNotifyMask e
|
||
|
|
flush dpy
|
||
|
|
where
|
||
|
|
m = str2digit magic
|
||
|
|
t = str2digit tag
|
||
|
|
|
||
|
|
splitXMsg :: (Integral a) => [a] -> (String, String)
|
||
|
|
splitXMsg s = (magic, filter isAlphaNum tag)
|
||
|
|
where
|
||
|
|
(magic, tag) = splitAt 5 $ map (chr . fromInteger . toInteger) s
|
||
|
|
|
||
|
|
str2digit :: (Num a) => String -> a
|
||
|
|
str2digit = fromIntegral
|
||
|
|
. sum
|
||
|
|
. map (\(p, n) -> n * 256 ^ p)
|
||
|
|
. zip [0 :: Int ..]
|
||
|
|
. map fromEnum
|