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{-# LANGUAGE GeneralizedNewtypeDeriving #-}
module Phi.X11 ( PanelPosition(..)
, PhiXConfig(..)
, phiDefaultXConfig
, initPhi
) where
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras
import Graphics.X11.Xinerama
import Control.Monad
import Data.Maybe
import Data.Bits
import Control.Monad.State
import Control.Monad.Trans
data PanelPosition = PanelPositionTop | PanelPositionBottom
data PhiXConfig = PhiXConfig { phiXScreenInfo :: Display -> IO [Rectangle]
, phiPanelPosition :: PanelPosition
, phiPanelSize :: Int
}
data PhiState = PhiState { phiXConfig :: PhiXConfig
, phiDisplay :: Display
, phiRootPixmap :: Pixmap
, phiPanels :: [PanelState]
}
data PanelState = PanelState { panelWindow :: Window
, panelGC :: GC
, panelArea :: Rectangle
, panelScreenArea :: Rectangle
}
newtype Phi a = Phi (StateT PhiState IO a)
deriving (Monad, MonadState PhiState, MonadIO)
runPhi :: PhiState -> Phi a -> IO (a, PhiState)
runPhi st (Phi a) = runStateT a st
phiDefaultXConfig = PhiXConfig { phiXScreenInfo = getScreenInfo
, phiPanelPosition = PanelPositionTop
, phiPanelSize = 24
}
initPhi :: PhiXConfig -> IO ()
initPhi config = do
disp <- openDisplay []
selectInput disp (defaultRootWindow disp) $ propertyChangeMask.|.structureNotifyMask
runPhi PhiState { phiXConfig = config, phiDisplay = disp, phiRootPixmap = 0, phiPanels = [] } $ do
updateRootPixmap
screens <- liftIO $ phiXScreenInfo config disp
panels <- mapM createPanel screens
forM_ panels $ \panel -> do
setPanelProperties panel
liftIO $ mapWindow disp (panelWindow panel)
modify $ \state -> state { phiPanels = panels }
state <- get
liftIO $ allocaXEvent $ \xevent -> runPhi state $ do
forever $ do
liftIO $ nextEvent disp xevent
event <- liftIO $ getEvent xevent
case event of
ExposeEvent {} -> updatePanels
PropertyEvent {} -> handlePropertyUpdate event
_ -> return ()
return ()
updatePanels :: Phi ()
updatePanels = do
disp <- gets phiDisplay
rootPixmap <- gets phiRootPixmap
panels <- gets phiPanels
forM_ panels $ \panel -> liftIO $ withRectangle (panelArea panel) (copyArea disp rootPixmap (panelWindow panel) (panelGC panel)) 0 0
handlePropertyUpdate :: Event -> Phi ()
handlePropertyUpdate PropertyEvent { ev_atom = atom } = do
disp <- gets phiDisplay
panels <- gets phiPanels
atom_XROOTPMAP_ID <- liftIO $ internAtom disp "_XROOTPMAP_ID" False
atom_XROOTMAP_ID <- liftIO $ internAtom disp "_XROOTMAP_ID" False
when (atom == atom_XROOTPMAP_ID || atom == atom_XROOTMAP_ID) $ do
updateRootPixmap
updatePanels
updateRootPixmap :: Phi ()
updateRootPixmap = do
disp <- gets phiDisplay
let screen = defaultScreen disp
rootwin = defaultRootWindow disp
atom_XROOTPMAP_ID <- liftIO $ internAtom disp "_XROOTPMAP_ID" False
atom_XROOTMAP_ID <- liftIO $ internAtom disp "_XROOTMAP_ID" False
pixmap <- liftM (fromMaybe 0 . listToMaybe . join . catMaybes) $ forM [atom_XROOTPMAP_ID, atom_XROOTMAP_ID] $ \atom -> liftIO $ rawGetWindowProperty 32 disp atom rootwin
modify $ \state -> state { phiRootPixmap = pixmap }
createPanel :: Rectangle -> Phi PanelState
createPanel screen = do
config <- gets phiXConfig
let rect = panelBounds config screen
disp <- gets phiDisplay
win <- createPanelWindow rect
gc <- liftIO $ createGC disp win
return PanelState { panelWindow = win, panelGC = gc, panelArea = rect, panelScreenArea = screen }
createPanelWindow :: Rectangle -> Phi Window
createPanelWindow rect = do
disp <- gets phiDisplay
let screen = defaultScreen disp
depth = defaultDepth disp screen
visual = defaultVisual disp screen
colormap = defaultColormap disp screen
rootwin = defaultRootWindow disp
mask = cWEventMask.|.cWColormap.|.cWBackPixel.|.cWBorderPixel
liftIO $ allocaSetWindowAttributes $ \attr -> do
set_colormap attr colormap
set_background_pixel attr 0
set_border_pixel attr 0
set_event_mask attr exposureMask
withRectangle rect (createWindow disp rootwin) 0 depth inputOutput visual mask attr
setPanelProperties :: PanelState -> Phi ()
setPanelProperties panel = do
disp <- gets phiDisplay
liftIO $ do
atom_NET_WM_WINDOW_TYPE <- internAtom disp "_NET_WM_WINDOW_TYPE" False
atom_NET_WM_WINDOW_TYPE_DOCK <- internAtom disp "_NET_WM_WINDOW_TYPE_DOCK" False
atom_NET_WM_DESKTOP <- internAtom disp "_NET_WM_DESKTOP" False
atom_NET_WM_STATE <- internAtom disp "_NET_WM_STATE" False
atom_NET_WM_STATE_SKIP_PAGER <- internAtom disp "_NET_WM_STATE_SKIP_PAGER" False
atom_NET_WM_STATE_SKIP_TASKBAR <- internAtom disp "_NET_WM_STATE_SKIP_TASKBAR" False
atom_NET_WM_STATE_STICKY <- internAtom disp "_NET_WM_STATE_STICKY" False
atom_NET_WM_STATE_BELOW <- internAtom disp "_NET_WM_STATE_BELOW" False
atom_MOTIF_WM_HINTS <- internAtom disp "_MOTIF_WM_HINTS" False
storeName disp (panelWindow panel) "Phi"
changeProperty32 disp (panelWindow panel) atom_NET_WM_WINDOW_TYPE aTOM propModeReplace [fromIntegral atom_NET_WM_WINDOW_TYPE_DOCK]
changeProperty32 disp (panelWindow panel) atom_NET_WM_DESKTOP cARDINAL propModeReplace [0xFFFFFFFF]
changeProperty32 disp (panelWindow panel) atom_NET_WM_STATE aTOM propModeReplace [ fromIntegral atom_NET_WM_STATE_SKIP_PAGER
, fromIntegral atom_NET_WM_STATE_SKIP_TASKBAR
, fromIntegral atom_NET_WM_STATE_STICKY
, fromIntegral atom_NET_WM_STATE_BELOW]
setWMHints disp (panelWindow panel) WMHints { wmh_flags = fromIntegral inputHintBit
, wmh_input = False
, wmh_initial_state = 0
, wmh_icon_pixmap = 0
, wmh_icon_window = 0
, wmh_icon_x = 0
, wmh_icon_y = 0
, wmh_icon_mask = 0
, wmh_window_group = 0
}
changeProperty32 disp (panelWindow panel) atom_MOTIF_WM_HINTS atom_MOTIF_WM_HINTS propModeReplace [ 2, 0, 0, 0, 0 ]
setStruts panel
setStruts :: PanelState -> Phi ()
setStruts panel = do
disp <- gets phiDisplay
config <- gets phiXConfig
let rootwin = defaultRootWindow disp
position = phiPanelPosition config
area = panelArea panel
(_, _, _, _, rootHeight, _, _) <- liftIO $ getGeometry disp rootwin
let struts = case position of
PanelPositionTop -> [ 0
, 0
, (fromIntegral $ rect_y area) + (fromIntegral $ rect_height area)
, 0
, 0
, 0
, 0
, 0
, (fromIntegral $ rect_x area)
, (fromIntegral $ rect_x area) + (fromIntegral $ rect_width area) - 1
, 0
, 0
]
PanelPositionBottom -> [ 0
, 0
, 0
, (fromIntegral rootHeight) - (fromIntegral $ rect_y area)
, 0
, 0
, 0
, 0
, 0
, 0
, (fromIntegral $ rect_x area)
, (fromIntegral $ rect_x area) + (fromIntegral $ rect_width area) - 1
]
liftIO $ do
atom_NET_WM_STRUT <- internAtom disp "_NET_WM_STRUT" False
atom_NET_WM_STRUT_PARTIAL <- internAtom disp "_NET_WM_STRUT_PARTIAL" False
changeProperty32 disp (panelWindow panel) atom_NET_WM_STRUT cARDINAL propModeReplace $ take 4 struts
changeProperty32 disp (panelWindow panel) atom_NET_WM_STRUT_PARTIAL cARDINAL propModeReplace struts
panelBounds :: PhiXConfig -> Rectangle -> Rectangle
panelBounds config screenBounds = case phiPanelPosition config of
PanelPositionTop -> screenBounds { rect_height = fromIntegral $ phiPanelSize config }
PanelPositionBottom -> screenBounds { rect_height = fromIntegral $ phiPanelSize config,
rect_y = (rect_y screenBounds) + (fromIntegral $ rect_height screenBounds) - (fromIntegral $ phiPanelSize config) }
withRectangle :: Rectangle -> (Position -> Position -> Dimension -> Dimension -> a) -> a
withRectangle r = withDimension r . withPosition r
withPosition :: Rectangle -> (Position -> Position -> a) -> a
withPosition r f = f (rect_x r) (rect_y r)
withDimension :: Rectangle -> (Dimension -> Dimension -> a) -> a
withDimension r f = f (rect_width r) (rect_height r)
|
