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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 Control.Monad.State
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, floating, member)
import qualified StackSet as W
import Operations
import System.IO
--
-- 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
xinesc <- getScreenInfo dpy
nbc <- initcolor normalBorderColor
fbc <- initcolor focusedBorderColor
hSetBuffering stdout NoBuffering
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
, normalBorder = nbc
, focusedBorder = fbc }
st = XState
{ windowset = winset
, layouts = M.fromList [(w, safeLayouts) | w <- [0 .. W workspaces - 1]]
, statusGaps = take (length xinesc) $ defaultGaps ++ repeat (0,0,0,0)
, xineScreens = xinesc }
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
grabButtons dpy rootw
sync dpy False
ws <- scan dpy rootw -- on the resume case, will pick up new windows
allocaXEvent $ \e ->
runX cf st $ do
-- walk workspace, resetting X states/mask for windows
-- TODO, general iterators for these lists.
sequence_ [ setInitialProperties w >> reveal w
| wk <- map W.workspace (W.current winset : W.visible winset)
, w <- W.integrate (W.stack wk) ]
sequence_ [ setInitialProperties w >> hide w
| wk <- W.hidden winset
, w <- W.integrate (W.stack wk) ]
mapM_ manage ws -- find new windows
when logging $ withWindowSet (io . hPrint stdout)
-- 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 new windows to manage. If they're already managed,
-- this should be idempotent.
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
forM_ (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 .|.)) extraModifiers
where grab kc m = grabKey dpy kc m rootw True grabModeAsync grabModeAsync
grabButtons :: Display -> Window -> IO ()
grabButtons dpy rootw = do
ungrabButton dpy anyButton anyModifier rootw
mapM_ (\(m,b) -> mapM_ (grab b . (m .|.)) extraModifiers) (M.keys mouseBindings)
where grab button mask = grabButton dpy button mask rootw False buttonPressMask
grabModeAsync grabModeSync none none
extraModifiers :: [KeyMask]
extraModifiers = [0, numlockMask, lockMask, numlockMask .|. lockMask ]
cleanMask :: KeyMask -> KeyMask
cleanMask = (complement (numlockMask .|. lockMask) .&.)
-- ---------------------------------------------------------------------
-- | 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 (cleanMask m,s) keys) id
-- manage a new window
handle (MapRequestEvent {ev_window = w}) = withDisplay $ \dpy -> do
wa <- io $ getWindowAttributes dpy w -- ignore override windows
-- need to ignore mapping requests by managed windows not on the current workspace
managed <- isClient w
when (not (wa_override_redirect wa) && not managed) $ do manage w
-- window destroyed, unmanage it
-- window gone, unmanage it
handle (DestroyWindowEvent {ev_window = w}) = whenX (isClient w) $ unmanage w
-- We only handle synthetic unmap events, because real events are confusable
-- with the events produced by 'hide'. ICCCM says that all clients should send
-- synthetic unmap events immediately after unmapping, and later describes
-- clients that do not follow the rule as "obsolete". For now, we make the
-- simplifying assumption that nobody uses clients that were already obsolete
-- in 1994. Note that many alternative methods for resolving the hide/withdraw
-- ambiguity are racy.
handle (UnmapEvent {ev_window = w, ev_send_event = True}) = 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 e@(ButtonEvent {ev_window = w,ev_event_type = t,ev_button = b })
| t == buttonPress = do
isr <- isRoot w
if isr then whenJust (M.lookup (cleanMask (ev_state e), b) mouseBindings) ($ ev_subwindow e)
else focus w
-- If it's the root window, then it's something we
-- grabbed in grabButtons. Otherwise, it's click-to-focus.
-- 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 {ev_window = w}) = withDisplay $ \dpy -> do
ws <- gets windowset
wa <- io $ getWindowAttributes dpy w
if M.member w (floating ws) || not (member w ws)
then do io $ configureWindow dpy w (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 = fromIntegral borderWidth
, wc_sibling = ev_above e
, wc_stack_mode = ev_detail e }
when (member w ws) (float w)
else io $ allocaXEvent $ \ev -> do
setEventType ev configureNotify
setConfigureEvent ev w w
(wa_x wa) (wa_y wa) (wa_width wa)
(wa_height wa) (ev_border_width e) none (wa_override_redirect wa)
sendEvent dpy w False 0 ev
io $ sync dpy False
-- the root may have configured
handle (ConfigureEvent {ev_window = w}) = whenX (isRoot w) rescreen
handle _ = return () -- trace (eventName e) -- ignoring
|
