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| -rw-r--r-- | XMonad/Hooks/MessageHooks.hs | 307 | ||||
| -rw-r--r-- | xmonad-contrib.cabal | 1 |
2 files changed, 308 insertions, 0 deletions
diff --git a/XMonad/Hooks/MessageHooks.hs b/XMonad/Hooks/MessageHooks.hs new file mode 100644 index 0000000..827a504 --- /dev/null +++ b/XMonad/Hooks/MessageHooks.hs @@ -0,0 +1,307 @@ +{-# LANGUAGE MultiParamTypeClasses, FlexibleContexts #-} + +----------------------------------------------------------------------------- +-- | +-- Module : XMonad.Hooks.MessageHooks +-- Copyright : (c) Spencer Janssen 2007, Devin Mullins 2007 +-- License : BSD3-style (see LICENSE) +-- +-- Maintainer : Devin Mullins <me@twifkak.com>, +-- David Roundy <droundy@darcs.net> +-- Stability : experimental +-- Portability : not portable, uses mtl, X11, posix +-- +-- Provides an alternative main event loop that unifies event handlers into +-- the concept of a message filter chain. This module is experimental. +-- You'd have to be crazy to want to use it. +----------------------------------------------------------------------------- + +-- This module was started by copying the entire contents of XMonad.Main. Any +-- future changes to the original module should be replicated here. + +-- TODO: +-- * add state to messageHooks +-- * add messageHooks to the XConfig, if possible +-- * sendMessage should pass through the filter chain (broadcastMessage excepted) +-- * intercept broadcastMessage: +-- * * don't export broadcastMessage: +-- * * handle should just return True / False instead of calling broadcastMessage +-- * * broadcastMessage should be the last filter called by processMessage +-- * * users should be able to call broadcastMessage' (= processMessage $ messageHooks config) +-- * ability to schedule a message for delivery? +-- * ability to modify a message during transport? +-- * xmonad sends an InitMessage once? + +module XMonad.Hooks.MessageHooks (xmonad) where + +import Data.Bits +import qualified Data.Map as M +import qualified Data.Set as S +import Control.Monad.Reader +import Control.Monad.State +import Data.Maybe (fromMaybe) + +import System.Environment (getArgs) + +import Graphics.X11.Xlib hiding (refreshKeyboardMapping) +import Graphics.X11.Xlib.Extras +import Graphics.X11.Xinerama (getScreenInfo) + +import XMonad.Core +import XMonad.StackSet (new, floating, member) +import qualified XMonad.StackSet as W +import XMonad.Operations + +import System.IO + +-- True if message may continue; False to halt the filter chain. +type MessageHook = SomeMessage -> X Bool + +-- | +-- The main entry point +-- +xmonad :: (LayoutClass l Window, Read (l Window)) => [MessageHook] -> XConfig l -> IO () +xmonad messageHooks initxmc = do + -- First, wrap the layout in an existential, to keep things pretty: + let xmc = initxmc { layoutHook = Layout $ layoutHook initxmc } + dpy <- openDisplay "" + let dflt = defaultScreen dpy + + rootw <- rootWindow dpy dflt + xinesc <- getScreenInfo dpy + nbc <- initColor dpy $ normalBorderColor xmc + fbc <- initColor dpy $ focusedBorderColor xmc + hSetBuffering stdout NoBuffering + args <- getArgs + + let layout = layoutHook xmc + lreads = readsLayout layout + initialWinset = new layout (workspaces xmc) $ zipWith SD xinesc gaps + + maybeRead reads' s = case reads' s of + [(x, "")] -> Just x + _ -> Nothing + + winset = fromMaybe initialWinset $ do + ("--resume" : s : _) <- return args + ws <- maybeRead reads s + return . W.ensureTags layout (workspaces xmc) + $ W.mapLayout (fromMaybe layout . maybeRead lreads) ws + + gaps = take (length xinesc) $ defaultGaps xmc ++ repeat (0,0,0,0) + + cf = XConf + { display = dpy + , config = xmc + , theRoot = rootw + , normalBorder = nbc + , focusedBorder = fbc + , keyActions = keys xmc xmc + , buttonActions = mouseBindings xmc xmc } + st = XState + { windowset = initialWinset + , mapped = S.empty + , waitingUnmap = M.empty + , dragging = Nothing } + + 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 + + allocaXEvent $ \e -> + runX cf st $ do + + grabKeys + grabButtons + + io $ sync dpy False + + -- bootstrap the windowset, Operations.windows will identify all + -- the windows in winset as new and set initial properties for + -- those windows + windows (const winset) + + -- scan for all top-level windows, add the unmanaged ones to the + -- windowset + ws <- io $ scan dpy rootw + mapM_ manage ws + + -- main loop, for all you HOF/recursion fans out there. + forever_ $ processMessage messageHooks . SomeMessage =<< io (nextEvent dpy e >> getEvent e) + + return () + where forever_ a = a >> forever_ a + + +processMessage :: [MessageHook] -> SomeMessage -> X () +processMessage (mh : mhs) msg = whenX (mh msg) $ processMessage mhs msg +processMessage [] msg + | Just event <- fromMessage msg = handle event +processMessage [] _ = return () + +-- --------------------------------------------------------------------- +-- | 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 + mClean <- cleanMask m + ks <- asks keyActions + userCode $ whenJust (M.lookup (mClean, s) ks) 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 track expected unmap events in waitingUnmap. We ignore this event unless +-- it is synthetic or we are not expecting an unmap notification from a window. +handle (UnmapEvent {ev_window = w, ev_send_event = synthetic}) = whenX (isClient w) $ do + e <- gets (fromMaybe 0 . M.lookup w . waitingUnmap) + if (synthetic || e == 0) + then unmanage w + else modify (\s -> s { waitingUnmap = M.adjust pred w (waitingUnmap s) }) + +-- set keyboard mapping +handle e@(MappingNotifyEvent {}) = do + io $ refreshKeyboardMapping e + when (ev_request e == mappingKeyboard) grabKeys + +-- handle button release, which may finish dragging. +handle e@(ButtonEvent {ev_event_type = t}) + | t == buttonRelease = do + drag <- gets dragging + case drag of + -- we're done dragging and have released the mouse: + Just (_,f) -> modify (\s -> s { dragging = Nothing }) >> f + Nothing -> broadcastMessage e + +-- handle motionNotify event, which may mean we are dragging. +handle e@(MotionEvent {ev_event_type = _t, ev_x = x, ev_y = y}) = do + drag <- gets dragging + case drag of + Just (d,_) -> d (fromIntegral x) (fromIntegral y) -- we're dragging + Nothing -> broadcastMessage e + +-- 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 + -- If it's the root window, then it's something we + -- grabbed in grabButtons. Otherwise, it's click-to-focus. + isr <- isRoot w + m <- cleanMask $ ev_state e + ba <- asks buttonActions + if isr then userCode $ whenJust (M.lookup (m, b) ba) ($ ev_subwindow e) + else focus w + sendMessage e -- Always send button events. + +-- 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 + + bw <- asks (borderWidth . config) + + 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 bw + , 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 + +-- configuration changes in the root may mean display settings have changed +handle (ConfigureEvent {ev_window = w}) = whenX (isRoot w) rescreen + +-- property notify +handle PropertyEvent { ev_event_type = t, ev_atom = a } + | t == propertyNotify && a == wM_NAME = userCode =<< asks (logHook . config) + +handle e = broadcastMessage e -- trace (eventName e) -- ignoring + + +-- --------------------------------------------------------------------- +-- 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 + -- TODO: scan for windows that are either 'IsViewable' or where WM_STATE == + -- Iconic + where ok w = do wa <- getWindowAttributes dpy w + a <- internAtom dpy "WM_STATE" False + p <- getWindowProperty32 dpy a w + let ic = case p of + Just (3:_) -> True -- 3 for iconified + _ -> False + return $ not (wa_override_redirect wa) + && (wa_map_state wa == waIsViewable || ic) + +-- | Grab the keys back +grabKeys :: X () +grabKeys = do + XConf { display = dpy, theRoot = rootw } <- ask + let grab kc m = io $ grabKey dpy kc m rootw True grabModeAsync grabModeAsync + io $ ungrabKey dpy anyKey anyModifier rootw + ks <- asks keyActions + forM_ (M.keys ks) $ \(mask,sym) -> do + kc <- io $ keysymToKeycode dpy sym + -- "If the specified KeySym is not defined for any KeyCode, + -- XKeysymToKeycode() returns zero." + when (kc /= '\0') $ mapM_ (grab kc . (mask .|.)) =<< extraModifiers + +-- | XXX comment me +grabButtons :: X () +grabButtons = do + XConf { display = dpy, theRoot = rootw } <- ask + let grab button mask = io $ grabButton dpy button mask rootw False buttonPressMask + grabModeAsync grabModeSync none none + io $ ungrabButton dpy anyButton anyModifier rootw + ems <- extraModifiers + ba <- asks buttonActions + mapM_ (\(m,b) -> mapM_ (grab b . (m .|.)) ems) (M.keys $ ba) diff --git a/xmonad-contrib.cabal b/xmonad-contrib.cabal index b06eba9..0c5a6c7 100644 --- a/xmonad-contrib.cabal +++ b/xmonad-contrib.cabal @@ -66,6 +66,7 @@ library XMonad.Hooks.DynamicLog XMonad.Hooks.EwmhDesktops XMonad.Hooks.ManageDocks + XMonad.Hooks.MessageHooks XMonad.Hooks.SetWMName XMonad.Hooks.UrgencyHook XMonad.Hooks.XPropManage |