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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 minimalist, tiling window manager for X11
--
import Data.Bits
import qualified Data.Map as M
import Control.Monad.Reader
import System.Environment (getArgs)
import Graphics.X11.Xlib hiding (refreshKeyboardMapping)
import Graphics.X11.Xlib.Extras
import Graphics.X11.Xinerama (getScreenInfo)
import XMonad
import Config
import StackSet (new)
import Operations (manage, unmanage, focus, setFocusX, full, isClient, rescreen)
--
-- The main entry point
--
main :: IO ()
main = do
dpy <- openDisplay ""
let dflt = defaultScreen dpy
initcolor c = fst `liftM` allocNamedColor dpy (defaultColormap dpy dflt) c
rootw <- rootWindow dpy dflt
wmdelt <- internAtom dpy "WM_DELETE_WINDOW" False
wmprot <- internAtom dpy "WM_PROTOCOLS" False
xinesc <- getScreenInfo dpy
nbc <- initcolor normalBorderColor
fbc <- initcolor focusedBorderColor
args <- getArgs
let winset | ("--resume" : s : _) <- args
, [(x, "")] <- reads s = x
| otherwise = new (fromIntegral workspaces) (fromIntegral $ length xinesc)
safeLayouts = case defaultLayouts of [] -> (full, []); (x:xs) -> (x, xs)
cf = XConf
{ display = dpy
, theRoot = rootw
, wmdelete = wmdelt
, wmprotocols = wmprot
-- fromIntegral needed for X11 versions that use Int instead of CInt.
, normalBorder = nbc
, focusedBorder = fbc
}
st = XState
{ windowset = winset
, layouts = M.fromList [(w, safeLayouts) | w <- [0 .. W workspaces - 1]]
, xineScreens = xinesc
, dimensions = (fromIntegral (displayWidth dpy dflt),
fromIntegral (displayHeight dpy dflt)) }
xSetErrorHandler -- in C, I'm too lazy to write the binding: dons
-- setup initial X environment
sync dpy False
selectInput dpy rootw $ substructureRedirectMask .|. substructureNotifyMask
.|. enterWindowMask .|. leaveWindowMask .|. structureNotifyMask
grabKeys dpy rootw
sync dpy False
ws <- scan dpy rootw
allocaXEvent $ \e ->
runX cf st $ do
mapM_ manage ws
-- main loop, for all you HOF/recursion fans out there.
forever $ handle =<< io (nextEvent dpy e >> getEvent e)
where 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 (wa_override_redirect wa)
&& wa_map_state wa == waIsViewable
-- | Grab the keys back
grabKeys :: Display -> Window -> IO ()
grabKeys dpy rootw = do
ungrabKey dpy anyKey anyModifier rootw
flip mapM_ (M.keys keys) $ \(mask,sym) -> do
kc <- keysymToKeycode dpy sym
-- "If the specified KeySym is not defined for any KeyCode,
-- XKeysymToKeycode() returns zero."
when (kc /= '\0') $ mapM_ (grab kc . (mask .|.)) $
[0, numlockMask, lockMask, numlockMask .|. lockMask]
where
grab kc m = grabKey dpy kc m rootw True grabModeAsync grabModeAsync
-- ---------------------------------------------------------------------
-- | Event handler. Map X events onto calls into Operations.hs, which
-- modify our internal model of the window manager state.
--
-- Events dwm handles that we don't:
--
-- [ButtonPress] = buttonpress,
-- [Expose] = expose,
-- [PropertyNotify] = propertynotify,
--
handle :: Event -> X ()
-- run window manager command
handle (KeyEvent {ev_event_type = t, ev_state = m, ev_keycode = code})
| t == keyPress = withDisplay $ \dpy -> do
s <- io $ keycodeToKeysym dpy code 0
whenJust (M.lookup (complement (numlockMask .|. lockMask) .&. m,s) keys) id
-- manage a new window
handle (MapRequestEvent {ev_window = w}) = withDisplay $ \dpy -> do
wa <- io $ getWindowAttributes dpy w -- ignore override windows
when (not (wa_override_redirect wa)) $ manage w
-- window destroyed, unmanage it
-- window gone, unmanage it
handle (DestroyWindowEvent {ev_window = w}) = whenX (isClient w) $ unmanage w
handle (UnmapEvent {ev_window = w}) = whenX (isClient w) $ unmanage w
-- set keyboard mapping
handle e@(MappingNotifyEvent {ev_window = w}) = do
io $ refreshKeyboardMapping e
when (ev_request e == mappingKeyboard) $ withDisplay $ io . flip grabKeys w
-- click on an unfocused window, makes it focused on this workspace
handle (ButtonEvent {ev_window = w, ev_event_type = t}) | t == buttonPress = focus w
-- entered a normal window, makes this focused.
handle e@(CrossingEvent {ev_window = w, ev_event_type = t})
| t == enterNotify && ev_mode e == notifyNormal
&& ev_detail e /= notifyInferior = focus w
-- left a window, check if we need to focus root
handle e@(CrossingEvent {ev_event_type = t})
| t == leaveNotify
= do rootw <- asks theRoot
when (ev_window e == rootw && not (ev_same_screen e)) $ setFocusX rootw
-- configure a window
handle e@(ConfigureRequestEvent {}) = withDisplay $ \dpy -> do
io $ configureWindow dpy (ev_window e) (ev_value_mask e) $ WindowChanges
{ wc_x = ev_x e
, wc_y = ev_y e
, wc_width = ev_width e
, wc_height = ev_height e
, wc_border_width = ev_border_width e
, wc_sibling = ev_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
, wc_stack_mode = fromIntegral $ ev_detail e }
io $ sync dpy False
-- the root may have configured
handle (ConfigureEvent {ev_window = w}) = whenX (isRoot w) rescreen
handle _ = return () -- trace (eventName e) -- ignoring
|
