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This is a convenience module in order to have less import noise. It
re-exports the following:
a) Commonly used modules in full (Data.Foldable, Data.Applicative, and
so on); though only those that play nicely with each other, so that
XMonad.Prelude can be imported unqualified without any problems.
This prevents things like `Prelude.(.)` and `Control.Category.(.)`
fighting with each other.
b) Helper functions that don't necessarily fit in any other module;
e.g., the often used abbreviation `fi = fromIntegral`.
141 lines
6.3 KiB
Haskell
141 lines
6.3 KiB
Haskell
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses #-}
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----------------------------------------------------------------------------
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-- |
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-- Module : XMonad.Layout.WindowSwitcherDecoration
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-- Copyright : (c) Jan Vornberger 2009
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-- Alejandro Serrano 2010
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-- License : BSD3-style (see LICENSE)
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--
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-- Maintainer : jan.vornberger@informatik.uni-oldenburg.de
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-- Stability : unstable
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-- Portability : not portable
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--
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-- A decoration that allows to switch the position of windows by dragging
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-- them onto each other.
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--
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-----------------------------------------------------------------------------
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module XMonad.Layout.WindowSwitcherDecoration
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( -- * Usage:
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-- $usage
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windowSwitcherDecoration,
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windowSwitcherDecorationWithButtons,
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windowSwitcherDecorationWithImageButtons,
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WindowSwitcherDecoration, ImageWindowSwitcherDecoration,
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) where
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import XMonad
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import XMonad.Layout.Decoration
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import XMonad.Layout.DecorationAddons
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import XMonad.Layout.ImageButtonDecoration
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import XMonad.Layout.DraggingVisualizer
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import qualified XMonad.StackSet as S
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import XMonad.Prelude
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import Foreign.C.Types(CInt)
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-- $usage
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-- You can use this module with the following in your
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-- @~\/.xmonad\/xmonad.hs@:
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--
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-- > import XMonad.Layout.WindowSwitcherDecoration
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-- > import XMonad.Layout.DraggingVisualizer
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--
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-- Then edit your @layoutHook@ by adding the WindowSwitcherDecoration to
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-- your layout:
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--
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-- > myL = windowSwitcherDecoration shrinkText def (draggingVisualizer $ layoutHook def)
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-- > main = xmonad def { layoutHook = myL }
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--
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-- There is also a version of the decoration that contains buttons like
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-- "XMonad.Layout.ButtonDecoration". To use that version, you will need to
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-- import "XMonad.Layout.DecorationAddons" as well and modify your @layoutHook@
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-- in the following way:
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--
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-- > import XMonad.Layout.DecorationAddons
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-- >
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-- > myL = windowSwitcherDecorationWithButtons shrinkText defaultThemeWithButtons (draggingVisualizer $ layoutHook def)
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-- > main = xmonad def { layoutHook = myL }
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--
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-- Additionaly, there is a version of the decoration that contains image buttons like
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-- "XMonad.Layout.ImageButtonDecoration". To use that version, you will need to
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-- import "XMonad.Layout.ImageButtonDecoration" as well and modify your @layoutHook@
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-- in the following way:
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--
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-- > import XMonad.Layout.ImageButtonDecoration
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-- >
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-- > myL = windowSwitcherDecorationWithImageButtons shrinkText defaultThemeWithImageButtons (draggingVisualizer $ layoutHook def)
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-- > main = xmonad def { layoutHook = myL }
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--
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windowSwitcherDecoration :: (Eq a, Shrinker s) => s -> Theme
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-> l a -> ModifiedLayout (Decoration WindowSwitcherDecoration s) l a
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windowSwitcherDecoration s c = decoration s c $ WSD False
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windowSwitcherDecorationWithButtons :: (Eq a, Shrinker s) => s -> Theme
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-> l a -> ModifiedLayout (Decoration WindowSwitcherDecoration s) l a
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windowSwitcherDecorationWithButtons s c = decoration s c $ WSD True
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data WindowSwitcherDecoration a = WSD Bool deriving (Show, Read)
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instance Eq a => DecorationStyle WindowSwitcherDecoration a where
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describeDeco _ = "WindowSwitcherDeco"
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decorationCatchClicksHook (WSD withButtons) mainw dFL dFR = if withButtons
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then titleBarButtonHandler mainw dFL dFR
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else return False
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decorationWhileDraggingHook _ ex ey (mainw, r) x y = handleTiledDraggingInProgress ex ey (mainw, r) x y
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decorationAfterDraggingHook _ (mainw, _) decoWin = do focus mainw
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hasCrossed <- handleScreenCrossing mainw decoWin
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unless hasCrossed $ do sendMessage $ DraggingStopped
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performWindowSwitching mainw
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-- Note: the image button code is duplicated from the above
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-- because the title bar handle is different
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windowSwitcherDecorationWithImageButtons :: (Eq a, Shrinker s) => s -> Theme
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-> l a -> ModifiedLayout (Decoration ImageWindowSwitcherDecoration s) l a
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windowSwitcherDecorationWithImageButtons s c = decoration s c $ IWSD True
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data ImageWindowSwitcherDecoration a = IWSD Bool deriving (Show, Read)
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instance Eq a => DecorationStyle ImageWindowSwitcherDecoration a where
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describeDeco _ = "ImageWindowSwitcherDeco"
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decorationCatchClicksHook (IWSD withButtons) mainw dFL dFR = if withButtons
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then imageTitleBarButtonHandler mainw dFL dFR
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else return False
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decorationWhileDraggingHook _ ex ey (mainw, r) x y = handleTiledDraggingInProgress ex ey (mainw, r) x y
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decorationAfterDraggingHook _ (mainw, _) decoWin = do focus mainw
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hasCrossed <- handleScreenCrossing mainw decoWin
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unless hasCrossed $ do sendMessage $ DraggingStopped
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performWindowSwitching mainw
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handleTiledDraggingInProgress :: CInt -> CInt -> (Window, Rectangle) -> Position -> Position -> X ()
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handleTiledDraggingInProgress ex ey (mainw, r) x y = do
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let rect = Rectangle (x - (fi ex - rect_x r))
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(y - (fi ey - rect_y r))
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(rect_width r)
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(rect_height r)
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sendMessage $ DraggingWindow mainw rect
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performWindowSwitching :: Window -> X ()
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performWindowSwitching win =
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withDisplay $ \d -> do
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root <- asks theRoot
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(_, _, selWin, _, _, _, _, _) <- io $ queryPointer d root
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ws <- gets windowset
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let allWindows = S.index ws
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-- do a little double check to be sure
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if (win `elem` allWindows) && (selWin `elem` allWindows)
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then do
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let allWindowsSwitched = map (switchEntries win selWin) allWindows
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let (ls, t:rs) = break (win ==) allWindowsSwitched
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let newStack = S.Stack t (reverse ls) rs
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windows $ S.modify' $ \_ -> newStack
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else return ()
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where
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switchEntries a b x
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| x == a = b
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| x == b = a
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| otherwise = x
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