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module Operations where
import Data.List
import Data.Maybe
import Data.Bits
import qualified Data.Map as M
import Control.Monad.State
import System.Posix.Process
import System.Environment
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras
import XMonad
import qualified StackSet as W
-- ---------------------------------------------------------------------
-- Managing windows
-- | refresh. Refresh the currently focused window. Resizes to full
-- screen and raises the window.
refresh :: X ()
refresh = do
ws <- gets workspace
ws2sc <- gets wsOnScreen
xinesc <- gets xineScreens
d <- gets display
l <- gets layout
ratio <- gets leftWidth
let move w a b c e = io $ moveResizeWindow d w a b c e
flip mapM_ (M.assocs ws2sc) $ \(n, scn) -> do
let sc = xinesc !! scn
sx = rect_x sc
sy = rect_y sc
sw = rect_width sc
sh = rect_height sc
case l of
Full -> whenJust (W.peekStack n ws) $ \w -> do
move w sx sy sw sh
io $ raiseWindow d w
Tile -> case W.index n ws of
[] -> return ()
[w] -> do move w sx sy sw sh; io $ raiseWindow d w
(w:s) -> do
let lw = floor $ fromIntegral sw * ratio
rw = sw - fromIntegral lw
rh = fromIntegral sh `div` fromIntegral (length s)
move w sx sy (fromIntegral lw) sh
zipWithM_ (\i a -> move a (sx + lw) (sy + i * rh) rw (fromIntegral rh)) [0..] s
whenJust (W.peek ws) (io . raiseWindow d) -- this is always Just
whenJust (W.peek ws) setFocus
-- | switchLayout. Switch to another layout scheme.
switchLayout :: X ()
switchLayout = do
modify (\s -> s {layout = case layout s of
Full -> Tile
Tile -> Full })
refresh
-- | changeWidth. Change the width of the main window in tiling mode.
changeWidth :: Rational -> X ()
changeWidth delta = do
-- the min/max stuff is to make sure that 0 <= leftWidth <= 1
modify (\s -> s {leftWidth = min 1 $ max 0 $ leftWidth s + delta})
refresh
-- | windows. Modify the current window list with a pure function, and refresh
windows :: (WorkSpace -> WorkSpace) -> X ()
windows f = do
modify $ \s -> s { workspace = f (workspace s) }
refresh
ws <- gets workspace
trace (show ws) -- log state changes to stderr
-- | hide. Hide a window by moving it offscreen.
hide :: Window -> X ()
hide w = withDisplay $ \d -> do
(sw,sh) <- gets dimensions
io $ moveWindow d w (2*fromIntegral sw) (2*fromIntegral sh)
-- ---------------------------------------------------------------------
-- Window operations
-- | manage. Add a new window to be managed in the current workspace. Bring it into focus.
-- If the window is already under management, it is just raised.
--
-- When we start to manage a window, it gains focus.
--
manage :: Window -> X ()
manage w = do
withDisplay $ \d -> io $ do
selectInput d w $ structureNotifyMask .|. enterWindowMask .|. propertyChangeMask
mapWindow d w
setFocus w
windows $ W.push w
-- | unmanage. A window no longer exists, remove it from the window
-- list, on whatever workspace it is.
unmanage :: Window -> X ()
unmanage w = do
windows $ W.delete w
withServerX $ do
setTopFocus
withDisplay $ \d -> io (sync d False)
-- TODO, everything operates on the current display, so wrap it up.
-- | Grab the X server (lock it) from the X monad
withServerX :: X () -> X ()
withServerX f = withDisplay $ \dpy -> do
io $ grabServer dpy
f
io $ ungrabServer dpy
-- | Explicitly set the keyboard focus to the given window
setFocus :: Window -> X ()
setFocus w = do
withDisplay $ \d -> io $ setInputFocus d w revertToPointerRoot 0
-- This does not use 'windows' intentionally. 'windows' calls refresh,
-- which means infinite loops.
modify (\s -> s { workspace = W.raiseFocus w (workspace s) })
-- | Set the focus to the window on top of the stack, or root
setTopFocus :: X ()
setTopFocus = do
ws <- gets workspace
case W.peek ws of
Just new -> setFocus new
Nothing -> gets theRoot >>= setFocus
-- | raise. focus to window at offset 'n' in list.
-- The currently focused window is always the head of the list
raise :: Ordering -> X ()
raise = windows . W.rotate
-- | promote. Make the focused window the master window in its workspace
promote :: X ()
promote = windows (\w -> maybe w (\k -> W.promote k w) (W.peek w))
-- | Kill the currently focused client
kill :: X ()
kill = withDisplay $ \d -> do
ws <- gets workspace
whenJust (W.peek ws) $ \w -> do
protocols <- io $ getWMProtocols d w
wmdelt <- gets wmdelete
wmprot <- gets wmprotocols
if wmdelt `elem` protocols
then io $ allocaXEvent $ \ev -> do
setEventType ev clientMessage
setClientMessageEvent ev w wmprot 32 wmdelt 0
sendEvent d w False noEventMask ev
else io (killClient d w) >> return ()
-- | tag. Move a window to a new workspace
tag :: Int -> X ()
tag o = do
ws <- gets workspace
let m = W.current ws
when (n /= m) $
whenJust (W.peek ws) $ \w -> do
hide w
windows $ W.shift n
where n = o-1
-- | view. Change the current workspace to workspce at offset 'n-1'.
view :: Int -> X ()
view o = do
ws <- gets workspace
ws2sc <- gets wsOnScreen
let m = W.current ws
-- is the workspace we want to switch to currently visible?
if M.member n ws2sc
then windows $ W.view n
else do
sc <- case M.lookup m ws2sc of
Nothing -> do
trace "Current workspace isn't visible! This should never happen!"
-- we don't know what screen to use, just use the first one.
return 0
Just sc -> return sc
modify $ \s -> s { wsOnScreen = M.insert n sc (M.filter (/=sc) ws2sc) }
gets wsOnScreen >>= trace . show
windows $ W.view n
mapM_ hide (W.index m ws)
setTopFocus
where n = o-1
-- | True if window is under management by us
isClient :: Window -> X Bool
isClient w = liftM (W.member w) (gets workspace)
-- | screenWS. Returns the workspace currently visible on screen n
screenWS :: Int -> X Int
screenWS n = do
ws2sc <- gets wsOnScreen
-- FIXME: It's ugly to have to query this way. We need a different way to
-- keep track of screen <-> workspace mappings.
let ws = fmap fst $ find (\(_, scn) -> scn == (n-1)) (M.assocs ws2sc)
return $ (fromMaybe 0 ws) + 1
-- | Restart xmonad by exec()'ing self. This doesn't save state and xmonad has
-- to be in PATH for this to work.
restart :: IO ()
restart = do prog <- getProgName
args <- getArgs
executeFile prog True args Nothing
|
