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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
--
-----------------------------------------------------------------------------
--
-- xmonad, a minimal window manager for X11
--
import Data.Bits
import qualified Data.Map as M
import Graphics.X11.Xlib hiding (refreshKeyboardMapping)
import Graphics.X11.Xlib.Extras
import Graphics.X11.Xinerama
import Control.Monad.State
import qualified StackSet as W
import XMonad
import Operations
import Config
--
-- The main entry point
--
main :: IO ()
main = do
dpy <- openDisplay ""
let dflt = defaultScreen dpy
rootw <- rootWindow dpy dflt
wmdelt <- internAtom dpy "WM_DELETE_WINDOW" False
wmprot <- internAtom dpy "WM_PROTOCOLS" False
xinesc <- getScreenInfo dpy
let st = XState
{ display = dpy
, xineScreens = xinesc
, theRoot = rootw
, wmdelete = wmdelt
, wmprotocols = wmprot
-- fromIntegral needed for X11 versions that use Int instead of CInt.
, dimensions = (fromIntegral (displayWidth dpy dflt),
fromIntegral (displayHeight dpy dflt))
, workspace = W.empty workspaces (length xinesc)
, defaultLayoutDesc = startingLayoutDesc
, layoutDescs = M.empty
}
xSetErrorHandler -- in C, I'm too lazy to write the binding
-- setup initial X environment
sync dpy False
selectInput dpy rootw $ substructureRedirectMask
.|. substructureNotifyMask
.|. enterWindowMask
.|. leaveWindowMask
grabKeys dpy rootw
sync dpy False
ws <- scan dpy rootw
allocaXEvent $ \e ->
runX st $ do
mapM_ manage ws
forever $ handle =<< xevent dpy e
where
xevent d e = io (nextEvent d e >> getEvent e)
forever a = a >> forever a
-- ---------------------------------------------------------------------
-- IO stuff. Doesn't require any X state
-- Most of these things run only on startup (bar grabkeys)
-- | scan for any initial windows to manage
scan :: Display -> Window -> IO [Window]
scan dpy rootw = do
(_, _, ws) <- queryTree dpy rootw
filterM ok ws
where
ok w = do wa <- getWindowAttributes dpy w
return $ not (waOverrideRedirect wa)
&& waMapState wa == waIsViewable
-- | Grab the keys back
grabKeys :: Display -> Window -> IO ()
grabKeys dpy rootw = do
ungrabKey dpy '\0' {-AnyKey-} anyModifier rootw
flip mapM_ (M.keys keys) $ \(mask,sym) -> do
kc <- keysymToKeycode dpy sym
mapM_ (grab kc) [mask, mask .|. numlockMask] -- note: no numlock
where
grab kc m = grabKey dpy kc m rootw True grabModeAsync grabModeAsync
-- ---------------------------------------------------------------------
-- Event handler
--
-- | handle. Handle X events
--
-- Events dwm handles that we don't:
--
-- [ButtonPress] = buttonpress,
-- [Expose] = expose,
-- [PropertyNotify] = propertynotify,
--
-- Todo: seperate IO from X monad stuff. We want to be able to test the
-- handler, and client functions, with dummy X interface ops, in QuickCheck
--
-- Will require an abstract interpreter from Event -> X Action, which
-- modifies the internal X state, and then produces an IO action to
-- evaluate.
--
-- XCreateWindowEvent(3X11)
-- Window manager clients normally should ignore this window if the
-- override_redirect member is True.
--
handle :: Event -> X ()
-- run window manager command
handle (KeyEvent {event_type = t, state = m, keycode = code})
| t == keyPress
= withDisplay $ \dpy -> do
s <- io $ keycodeToKeysym dpy code 0
whenJust (M.lookup (m,s) keys) id
-- manage a new window
handle (MapRequestEvent {window = w}) = withDisplay $ \dpy -> do
wa <- io $ getWindowAttributes dpy w -- ignore override windows
when (not (waOverrideRedirect wa)) $ manage w
-- window destroyed, unmanage it
handle (DestroyWindowEvent {window = w}) = do b <- isClient w; when b $ unmanage w
-- window gone, unmanage it
handle (UnmapEvent {window = w}) = do b <- isClient w; when b $ unmanage w
-- set keyboard mapping
handle e@(MappingNotifyEvent {window = w}) = do
-- this fromIntegral is only necessary with the old X11 version that uses
-- Int instead of CInt. TODO delete it when there is a new release of X11
let m = (request e, first_keycode e, fromIntegral $ count e)
withDisplay $ \d -> io $ refreshKeyboardMapping d m
when (request e == mappingKeyboard) $ withDisplay $ io . flip grabKeys w
-- click on an unfocussed window
handle (ButtonEvent {window = w, event_type = t})
| t == buttonPress
= safeFocus w
-- entered a normal window
handle e@(CrossingEvent {window = w, event_type = t})
| t == enterNotify && mode e == notifyNormal && detail e /= notifyInferior
= safeFocus w
-- left a window, check if we need to focus root
handle e@(CrossingEvent {event_type = t})
| t == leaveNotify
= do rootw <- gets theRoot
when (window e == rootw && not (same_screen e)) $ setFocus rootw
-- configure a window
handle e@(ConfigureRequestEvent {window = w}) = do
XState { display = dpy, workspace = ws } <- get
when (W.member w ws) $ -- already managed, reconfigure (see client:configure()
trace ("Reconfigure already managed window: " ++ show w)
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
-- this fromIntegral is only necessary with the old X11 version that uses
-- Int instead of CInt. TODO delete it when there is a new release of X11
, wcStackMode = fromIntegral $ detail e
}
io $ sync dpy False
handle e = trace (eventName e) -- ignoring
|
