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|
{-# LANGUAGE PatternGuards, FlexibleInstances, MultiParamTypeClasses #-}
{-# OPTIONS -fglasgow-exts #-}
-- deriving Typeable
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Hooks.ManageDocks
-- Copyright : (c) Joachim Breitner <mail@joachim-breitner.de>
-- License : BSD
--
-- Maintainer : Joachim Breitner <mail@joachim-breitner.de>
-- Stability : unstable
-- Portability : unportable
--
-- This module provides tools to automatically manage 'dock' type programs,
-- such as gnome-panel, kicker, dzen, and xmobar.
module XMonad.Hooks.ManageDocks (
-- * Usage
-- $usage
manageDocks, AvoidStruts, avoidStruts, ToggleStruts(ToggleStruts)
) where
-----------------------------------------------------------------------------
import XMonad
import Foreign.C.Types (CLong)
import Data.Maybe (catMaybes)
import Control.Monad
-- $usage
-- To use this module, add the following import to @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Hooks.ManageDocks
--
-- The first component is a 'ManageHook' which recognizes these windows. To
-- enable it:
--
-- > manageHook = ... <+> manageDocks
--
-- The second component is a layout modifier that prevents windows from
-- overlapping these dock windows. It is intended to replace xmonad's
-- so-called "gap" support. First, you must add it to your list of layouts:
--
-- > layoutHook = avoidStruts (tall ||| mirror tall ||| ...)
--
-- 'AvoidStruts' also supports toggling the dock gap, add a keybinding similar
-- to:
--
-- > ,((modMask, xK_b ), sendMessage ToggleStruts)
--
-- |
-- Detects if the given window is of type DOCK and if so, reveals it, but does
-- not manage it. If the window has the STRUT property set, adjust the gap accordingly.
manageDocks :: ManageHook
manageDocks = checkDock --> doIgnore
-- |
-- Checks if a window is a DOCK window
checkDock :: Query Bool
checkDock = ask >>= \w -> liftX $ do
a <- getAtom "_NET_WM_WINDOW_TYPE"
d <- getAtom "_NET_WM_WINDOW_TYPE_DOCK"
mbr <- getProp a w
case mbr of
Just [r] -> return (fromIntegral r == d)
_ -> return False
-- |
-- Gets the STRUT config, if present, in xmonad gap order
getStrut :: Window -> X (Maybe (Int, Int, Int, Int))
getStrut w = do
s <- getAtom "_NET_WM_STRUT"
sp <- getAtom "_NET_WM_STRUT_PARTIAL"
liftM2 (\a b -> mplus (parse a) (parse b))
(getProp s w)
(getProp sp w)
where
parse xs = case xs of
Just (l : r : t : b : _) -> Just (fi t, fi b, fi l, fi r)
_ -> Nothing
-- |
-- Helper to read a property
getProp :: Atom -> Window -> X (Maybe [CLong])
getProp a w = withDisplay $ \dpy -> io $ getWindowProperty32 dpy a w
-- |
-- Goes through the list of windows and find the gap so that all STRUT
-- settings are satisfied.
calcGap :: X Rectangle
calcGap = withDisplay $ \dpy -> do
rootw <- asks theRoot
-- We don't keep track of dock like windows, so we find all of them here
(_,_,wins) <- io $ queryTree dpy rootw
struts <- catMaybes `fmap` mapM getStrut wins
-- we grab the window attributes of the root window rather than checking
-- the width of the screen because xlib caches this info and it tends to
-- be incorrect after RAndR
wa <- io $ getWindowAttributes dpy rootw
return $ reduceScreen (foldl max4 (0,0,0,0) struts)
$ Rectangle (fi $ wa_x wa) (fi $ wa_y wa) (fi $ wa_width wa) (fi $ wa_height wa)
-- |
-- Piecewise maximum of a 4-tuple of Ints
max4 :: (Int, Int, Int, Int) -> (Int, Int, Int, Int) -> (Int, Int, Int, Int)
max4 (a1,a2,a3,a4) (b1,b2,b3,b4) = (max a1 b1, max a2 b2, max a3 b3, max a4 b4)
fi :: (Integral a, Num b) => a -> b
fi = fromIntegral
-- | Given strut values and the screen rectangle, compute a reduced screen
-- rectangle.
reduceScreen :: (Int, Int, Int, Int) -> Rectangle -> Rectangle
reduceScreen (t, b, l, r) s
= case r2c s of
(x1, y1, x2, y2) -> c2r (x1 + fi l, y1 + fi t, x2 - fi r, y2 - fi b)
r2c :: Rectangle -> (Position, Position, Position, Position)
r2c (Rectangle x y w h) = (x, y, x + fi w, y + fi h)
c2r :: (Position, Position, Position, Position) -> Rectangle
c2r (x1, y1, x2, y2) = Rectangle x1 y1 (fi $ x2 - x1) (fi $ y2 - y1)
-- | Given a bounding rectangle 's' and another rectangle 'r', compute a
-- rectangle 'r' that fits inside 's'.
fitRect :: Rectangle -> Rectangle -> Rectangle
fitRect s r
= c2r (max sx1 rx1, max sy1 ry1, min sx2 rx2, min sy2 ry2)
where
(sx1, sy1, sx2, sy2) = r2c s
(rx1, ry1, rx2, ry2) = r2c r
-- | Adjust layout automagically.
avoidStruts :: LayoutClass l a => l a -> AvoidStruts l a
avoidStruts = AvoidStruts True
data AvoidStruts l a = AvoidStruts Bool (l a) deriving ( Read, Show )
data ToggleStruts = ToggleStruts deriving (Read,Show,Typeable)
instance Message ToggleStruts
instance LayoutClass l a => LayoutClass (AvoidStruts l) a where
doLayout (AvoidStruts True lo) r s =
do rect <- fmap (flip fitRect r) calcGap
(wrs,mlo') <- doLayout lo rect s
return (wrs, AvoidStruts True `fmap` mlo')
doLayout (AvoidStruts False lo) r s = do (wrs,mlo') <- doLayout lo r s
return (wrs, AvoidStruts False `fmap` mlo')
handleMessage (AvoidStruts b l) m
| Just ToggleStruts <- fromMessage m = return $ Just $ AvoidStruts (not b) l
| otherwise = do ml' <- handleMessage l m
return (AvoidStruts b `fmap` ml')
description (AvoidStruts _ l) = description l
|
