232 lines
10 KiB
Haskell
232 lines
10 KiB
Haskell
{-# LANGUAGE TypeFamilies, DeriveDataTypeable #-}
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module Phi.Widgets.Taskbar ( TaskbarConfig(..)
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, defaultTaskbarConfig
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, taskbar
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) where
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import Control.Concurrent
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import Control.Monad
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import Control.Monad.State
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import Control.Monad.Trans
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import Data.Char
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import Data.Maybe
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import Data.Typeable
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import qualified Data.Map as M
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import Foreign.C.Types
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import Graphics.Rendering.Cairo
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import Graphics.Rendering.Pango.Cairo
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import Graphics.Rendering.Pango.Enums (PangoRectangle(..))
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import Graphics.Rendering.Pango.Layout
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import Graphics.X11.Xlib (Window)
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import qualified Graphics.X11.Xlib as Xlib
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import qualified Graphics.X11.Xlib.Extras as XExtras
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import Codec.Binary.UTF8.String
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import Phi.Phi
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import Phi.Types
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import Phi.Border
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import Phi.Widget
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import Phi.X11.Atoms
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data TaskbarConfig = TaskbarConfig { taskMaxSize :: !Int
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, showDesktops :: !Bool
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, taskBorder :: !BorderConfig
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, activeTaskBorder :: !BorderConfig
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} deriving Show
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defaultTaskbarConfig :: TaskbarConfig
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defaultTaskbarConfig = TaskbarConfig { taskMaxSize = 150
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, showDesktops = False
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, taskBorder = defaultBorderConfig
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, activeTaskBorder = defaultBorderConfig { borderColor = (1, 1, 1, 1) }
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}
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data Taskbar = Taskbar TaskbarConfig deriving Show
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data TaskbarState = TaskbarState { taskbarActiveWindow :: !Window
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, taskbarDesktopCount :: !Int
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, taskbarWindows :: ![Window]
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, taskbarWindowStates :: !(M.Map Window WindowState)
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} deriving Show
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data WindowState = WindowState { windowTitle :: !String
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, windowDesktop :: !Int
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, windowVisible :: !Bool
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} deriving (Show, Eq)
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data TaskbarMessage = WindowListUpdate [Xlib.Window] (M.Map Window WindowState)
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| DesktopCountUpdate Int
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| ActiveWindowUpdate Window
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deriving (Show, Typeable)
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instance WidgetClass Taskbar where
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type WidgetData Taskbar = TaskbarState
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initWidget (Taskbar _) phi dispvar = do
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forkIO $ taskbarRunner phi dispvar
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return $ TaskbarState 0 0 [] M.empty
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minSize _ = 0
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weight _ = 1
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render (Taskbar config) TaskbarState {taskbarActiveWindow = activeWindow, taskbarDesktopCount = desktopCount, taskbarWindows = windows, taskbarWindowStates = windowStates} w h = do
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let desktopWindows = map (\desktop -> (desktop, filter (fromMaybe False . fmap (windowOnDesktop desktop) . flip M.lookup windowStates) windows)) $ take desktopCount [0..]
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windowCount = sum $ map (length . snd) $ desktopWindows
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when (windowCount /= 0) $ do
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let windowWidth = min (taskMaxSize config) (w `div` windowCount)
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forM_ (zip [0..] $ join $ map snd desktopWindows) $ \(i, window) -> do
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let border = if window == activeWindow then activeTaskBorder config else taskBorder config
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drawBorder border (i*windowWidth) 0 windowWidth h
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handleMessage _ priv m = case (fromMessage m) of
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Just (WindowListUpdate windows windowStates) -> priv {taskbarWindows = windows, taskbarWindowStates = windowStates}
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Just (DesktopCountUpdate count) -> priv {taskbarDesktopCount = count}
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Just (ActiveWindowUpdate window) -> priv {taskbarActiveWindow = window}
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_ -> priv
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windowOnDesktop :: Int -> WindowState -> Bool
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windowOnDesktop desktop state = (windowVisible state) && (desktop == windowDesktop state)
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taskbarRunner :: Phi -> Display -> IO ()
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taskbarRunner phi dispvar = do
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(windows, tasks) <- liftIO $ withDisplay dispvar $ \disp -> do
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(windows, tasks) <- getWindowStates disp (getAtoms dispvar) [] M.empty
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desktopCount <- getDesktopCount disp (getAtoms dispvar)
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activeWindow <- getActiveWindow disp (getAtoms dispvar)
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sendMessage phi $ WindowListUpdate windows tasks
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sendMessage phi $ DesktopCountUpdate desktopCount
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sendMessage phi $ ActiveWindowUpdate activeWindow
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return (windows, tasks)
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sendMessage phi Repaint
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flip evalStateT (windows, tasks) $ forever $ do
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m <- receiveMessage phi
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case (fromMessage m) of
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Just event@XExtras.PropertyEvent {} ->
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handlePropertyUpdate phi dispvar event
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_ ->
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return ()
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handlePropertyUpdate :: Phi -> Display -> XExtras.Event -> StateT ([Window], M.Map Window WindowState) IO ()
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handlePropertyUpdate phi dispvar XExtras.PropertyEvent {XExtras.ev_atom = atom, XExtras.ev_window = window} = do
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let atoms = getAtoms dispvar
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when (elem atom $ map ($ atoms) [ atom_NET_ACTIVE_WINDOW
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, atom_NET_NUMBER_OF_DESKTOPS
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, atom_NET_CLIENT_LIST
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, atom_NET_WM_NAME
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, atomWM_NAME
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, atom_NET_WM_DESKTOP
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, atom_NET_WM_STATE
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]) $ withDisplay dispvar $ \disp -> do
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let rootwin = Xlib.defaultRootWindow disp
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if (window == rootwin)
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then do
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when (atom == atom_NET_ACTIVE_WINDOW atoms) $ do
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activeWindow <- liftIO $ getActiveWindow disp atoms
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sendMessage phi $ ActiveWindowUpdate activeWindow
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sendMessage phi Repaint
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when (atom == atom_NET_NUMBER_OF_DESKTOPS atoms) $ do
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desktopCount <- liftIO $ getDesktopCount disp atoms
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sendMessage phi $ DesktopCountUpdate desktopCount
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sendMessage phi Repaint
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when (atom == atom_NET_CLIENT_LIST atoms) $ do
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(windows, windowStates) <- get
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(windows', windowStates') <- liftIO $ getWindowStates disp atoms windows windowStates
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when (windows /= windows' || windowStates /= windowStates') $ do
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sendMessage phi $ WindowListUpdate windows' windowStates'
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sendMessage phi Repaint
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put (windows', windowStates')
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else do
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(windows, windowStates) <- get
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when (elem window windows) $ do
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let windowState = M.lookup window windowStates
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windowState' <- liftIO $ getWindowState disp atoms window
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when (windowState /= (Just windowState')) $ do
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let windowStates' = M.insert window windowState' windowStates
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sendMessage phi $ WindowListUpdate windows windowStates'
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sendMessage phi Repaint
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put (windows, windowStates')
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getDesktopCount :: Xlib.Display -> Atoms -> IO Int
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getDesktopCount disp atoms =
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liftM (fromIntegral . fromMaybe 0 . join . fmap listToMaybe) $ XExtras.getWindowProperty32 disp (atom_NET_NUMBER_OF_DESKTOPS atoms) $ Xlib.defaultRootWindow disp
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getActiveWindow :: Xlib.Display -> Atoms -> IO Window
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getActiveWindow disp atoms =
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liftM (fromIntegral . fromMaybe 0 . join . fmap listToMaybe) $ XExtras.getWindowProperty32 disp (atom_NET_ACTIVE_WINDOW atoms) $ Xlib.defaultRootWindow disp
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getWindowStates :: Xlib.Display -> Atoms -> [Window] -> M.Map Window WindowState -> IO ([Window], M.Map Window WindowState)
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getWindowStates disp atoms oldWindows windowStates = do
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windows <- getWindowList disp atoms oldWindows
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let windowStates' = map (\w -> (w, M.lookup w windowStates)) windows
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newWindowStates <- mapM getWindowState' windowStates'
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return (windows, M.fromList newWindowStates)
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where
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rootwin = Xlib.defaultRootWindow disp
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getWindowState' (window, Just windowState) = return (window, windowState)
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getWindowState' (window, Nothing) = do
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windowState <- getWindowState disp atoms window
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return (window, windowState)
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getWindowState :: Xlib.Display -> Atoms -> Window -> IO WindowState
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getWindowState disp atoms window = do
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Xlib.selectInput disp window Xlib.propertyChangeMask
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netwmname <- liftM (fmap (decode . map fromIntegral)) $ XExtras.getWindowProperty8 disp (atom_NET_WM_NAME atoms) window
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wmname <- case netwmname of
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Just name -> return name
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Nothing -> liftM (map unsignedChr . fromMaybe []) $ XExtras.getWindowProperty8 disp (atomWM_NAME atoms) window
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workspace <- liftM (fromIntegral . fromMaybe 0xFFFFFFFF . join . fmap listToMaybe) $ XExtras.getWindowProperty32 disp (atom_NET_WM_DESKTOP atoms) window
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visible <- showWindow disp atoms window
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return $ WindowState wmname workspace visible
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where
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unsignedChr = chr . fromIntegral . (fromIntegral :: (CChar -> CUChar))
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showWindow :: Xlib.Display -> Atoms -> Window -> IO Bool
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showWindow disp atoms window = do
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states <- liftM (map fromIntegral . fromMaybe []) $ XExtras.getWindowProperty32 disp (atom_NET_WM_STATE atoms) window
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transientForHint <- XExtras.getTransientForHint disp window
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windowType <- liftM (fromMaybe (atom_NET_WM_WINDOW_TYPE_NORMAL atoms) . fmap fromIntegral . join . fmap listToMaybe) $ XExtras.getWindowProperty32 disp (atom_NET_WM_STATE atoms) window
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return $ not $ or [ elem (atom_NET_WM_STATE_SKIP_TASKBAR atoms) states
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, transientForHint /= Nothing
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, elem windowType $ map ($ atoms) [ atom_NET_WM_WINDOW_TYPE_DOCK
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, atom_NET_WM_WINDOW_TYPE_DESKTOP
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, atom_NET_WM_WINDOW_TYPE_TOOLBAR
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, atom_NET_WM_WINDOW_TYPE_MENU
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, atom_NET_WM_WINDOW_TYPE_SPLASH
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]
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]
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getWindowList :: Xlib.Display -> Atoms -> [Window] -> IO [Window]
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getWindowList disp atoms windows = do
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newWindows <- liftM (map fromIntegral . join . maybeToList) $ XExtras.getWindowProperty32 disp (atom_NET_CLIENT_LIST atoms) $ Xlib.defaultRootWindow disp
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return $ (filter (flip elem newWindows) windows) ++ (filter (not . flip elem windows) newWindows)
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taskbar :: TaskbarConfig -> Widget
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taskbar config = do
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Widget $ Taskbar config
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