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|
-----------------------------------------------------------------------------
-- |
-- Module : Main.hs
-- Copyright : (c) Spencer Janssen 2007
-- License : BSD3-style (see LICENSE)
--
-- Maintainer : sjanssen@cse.unl.edu
-- Stability : unstable
-- Portability : not portable, uses mtl, X11, posix
--
-----------------------------------------------------------------------------
--
-- thunk, a minimal window manager for X11
--
import Data.Bits hiding (rotate)
import Data.List
import qualified Data.Map as M
import System.IO
import System.Process (runCommand)
import System.Exit
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras
import Control.Monad.State
import W
--
-- The keys list
--
keys :: M.Map (KeyMask, KeySym) (W ())
keys = M.fromList
[ ((mod1Mask .|. shiftMask, xK_Return), spawn "xterm")
, ((mod1Mask, xK_p ), spawn "exe=`dmenu_path | dmenu` && exec $exe")
, ((controlMask, xK_space ), spawn "gmrun")
, ((mod1Mask, xK_Tab ), focus 1)
, ((mod1Mask, xK_j ), focus 1)
, ((mod1Mask, xK_k ), focus (-1))
, (mod1Mask .|. shiftMask, xK_c ), kill)
, ((mod1Mask .|. shiftMask, xK_q ), io $ exitWith ExitSuccess)
]
--
-- let's get underway
--
main :: IO ()
main = do
dpy <- openDisplay ""
let dflt = defaultScreen dpy
initState = WState
{ display = dpy
, screenWidth = displayWidth dpy dflt
, screenHeight = displayHeight dpy dflt
, windows = [] }
runW initState $ do
root <- io $ rootWindow dpy dflt
io $ do selectInput dpy root (substructureRedirectMask .|. substructureNotifyMask)
sync dpy False
registerKeys dpy root
go dpy
return ()
where
-- The main loop
go dpy = forever $ do
e <- io $ allocaXEvent $ \ev -> nextEvent dpy ev >> getEvent ev
handle e
-- register keys
registerKeys dpy root = forM_ (M.keys keys) $ \(mod,sym) -> io $ do
kc <- keysymToKeycode dpy sym
grabKey dpy kc mod root True grabModeAsync grabModeAsync
--
-- The event handler
--
handle :: Event -> W ()
handle (MapRequestEvent {window = w}) = manage w
handle (DestroyWindowEvent {window = w}) = unmanage w
handle (UnmapEvent {window = w}) = unmanage w
handle (KeyEvent {event_type = t, state = mod, keycode = code})
| t == keyPress = do
dpy <- gets display
sym <- io $ keycodeToKeysym dpy code 0
M.lookup (mod,sym) keys
handle e@(ConfigureRequestEvent {}) = do
dpy <- gets display
io $ configureWindow dpy (window e) (value_mask e) $ WindowChanges
{ wcX = x e
, wcY = y e
, wcWidth = width e
, wcHeight = height e
, wcBorderWidth = border_width e
, wcSibling = above e
, wcStackMode = detail e
}
io $ sync dpy False
handle _ = return ()
-- ---------------------------------------------------------------------
-- Managing windows
--
-- | refresh. Refresh the currently focused window. Resizes to full
-- screen and raises the window.
--
refresh :: W ()
refresh = do
ws <- gets windows
case ws of
[] -> return ()
(w:_) -> do
d <- gets display
sw <- liftM fromIntegral (gets screenWidth)
sh <- liftM fromIntegral (gets screenHeight)
io $ do moveResizeWindow d w 0 0 sw sh
raiseWindow d w
-- | Modify the current window list with a pure funtion, and refresh
withWindows :: (Windows -> Windows) -> W ()
withWindows f = do
modifyWindows f
refresh
-- | manage. Add a new window to be managed. Bring it into focus.
manage :: Window -> W ()
manage w = do
d <- gets display
io $ mapWindow d w
withWindows (nub . (w :))
-- | unmanage, a window no longer exists, remove it from the stack
unmanage :: Window -> W ()
unmanage w = do
ws <- gets windows
when (w `elem` ws) $ do
dpy <- gets display
io $ do grabServer dpy
sync dpy False
ungrabServer dpy
withWindows $ filter (/= w)
-- | focus. focus to window at offset 'n' in list.
-- The currently focused window is always the head of the list
focus :: Int -> W ()
focus n = withWindows (rotate n)
-- | spawn. Launch an external application
spawn :: String -> W ()
spawn = io_ . runCommand
-- | Kill the currently focused client
kill :: W ()
kill = do
ws <- gets windows
dpy <- gets display
case ws of
[] -> return ()
(w:_) -> do
-- if(isprotodel(sel))
-- sendevent(sel->win, wmatom[WMProtocols], wmatom[WMDelete]);
io $ killClient dpy w -- ignoring result
return ()
|
