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module Rahm.Desktop.StackSet (
masterWindow,
findWorkspace,
ensureWorkspace,
swapWorkspaces,
greedyView,
shiftWin,
screenRotateBackward,
screenRotateForward,
mapWindows,
swapWindows,
getLocationWorkspace,
WindowLocation(..),
windowMemberOfWorkspace,
findWindow,
module W) where
import Prelude hiding (head)
import Data.List.Safe (head)
import Data.List (find)
import XMonad.StackSet as W hiding (greedyView, shiftWin)
import qualified XMonad.StackSet
import Data.Default
import Data.Maybe (fromMaybe, catMaybes, listToMaybe)
import qualified Data.Map as Map
data WindowLocation i l a s sd =
OnScreen (Screen i l a s sd) |
OnHiddenWorkspace (Workspace i l a) |
Floating
getLocationWorkspace :: WindowLocation i l a s sd -> Maybe (Workspace i l a)
getLocationWorkspace (OnScreen (Screen w _ _)) = Just w
getLocationWorkspace (OnHiddenWorkspace w) = Just w
getLocationWorkspace _ = Nothing
mapWindows :: (Ord a, Ord b) => (a -> b) -> StackSet i l a s sd -> StackSet i l b s sd
mapWindows fn (StackSet cur vis hid float) =
StackSet
(mapWindowsScreen cur)
(map mapWindowsScreen vis)
(map mapWindowsWorkspace hid)
(Map.mapKeys fn float)
where
mapWindowsScreen (Screen work a b) = Screen (mapWindowsWorkspace work) a b
mapWindowsWorkspace (Workspace t l stack) =
Workspace t l (fmap (fmap fn) stack)
swapWindows :: (Ord a) => a -> a -> StackSet i l a s d -> StackSet i l a s d
swapWindows wa wb = mapWindows $ \w ->
case w of
_ | w == wa -> wb
_ | w == wb -> wa
_ -> w
masterWindow :: StackSet i l a s sd -> Maybe a
masterWindow = head . integrate' . stack . workspace . current
findWorkspace :: (Eq i) =>
i -> StackSet i l a s sd -> Maybe (Workspace i l a)
findWorkspace wid = find ((==wid) . tag) . workspaces
ensureWorkspace :: (Eq i) =>
i -> StackSet i l a s sd -> (StackSet i l a s sd, Workspace i l a)
ensureWorkspace t ss =
case findWorkspace t ss of
Nothing ->
let ws = Workspace t (layout . workspace . current $ ss) Nothing in
(ss { hidden = ws : hidden ss }, ws)
Just ws -> (ss, ws)
swapWorkspaces ::
(Eq i) =>
i -> i -> StackSet i l a s sd -> StackSet i l a s sd
swapWorkspaces wid1 wid2 ss =
let (ss', workspace1) = ensureWorkspace wid1 ss
(ss'', workspace2) = ensureWorkspace wid2 ss'
in
mapWorkspace (\w ->
case () of
_ | tag w == wid1 -> workspace2
_ | tag w == wid2 -> workspace1
_ -> w) ss''
greedyView :: (Eq i) => i -> StackSet i l a s sd -> StackSet i l a s sd
greedyView wid ss = swapWorkspaces (tag . workspace . current $ ss) wid ss
shiftWin :: (Ord a, Eq s, Eq i) => i -> a -> StackSet i l a s sd -> StackSet i l a s sd
shiftWin wid a = XMonad.StackSet.shiftWin wid a . fst . ensureWorkspace wid
screenRotateBackward :: W.StackSet i l a sid sd -> W.StackSet i l a sid sd
screenRotateBackward (W.StackSet current visible others floating) = do
let screens = current : visible
workspaces = tail $ cycle $ map W.workspace screens
(current':visible') = zipWith (\s w -> s {workspace = w} ) screens workspaces
in W.StackSet current' visible' others floating
screenRotateForward :: W.StackSet i l a sid sd -> W.StackSet i l a sid sd
screenRotateForward (W.StackSet current visible others floating) = do
let screens = current : visible
workspaces = rcycle $ map W.workspace screens
(current':visible') = zipWith (\s w -> s {workspace = w} ) screens workspaces
in W.StackSet current' visible' others floating
where rcycle l = last l : l
{- Finds a Window and returns the screen its on and the workspace its on.
- Returns nothing if the window doesn't exist.
-
- If the window is not a screen Just (Nothing, workspace) is returned.
- If the window is a floating window Just (Nothing, Nothing) is returned. -}
findWindow ::
(Eq a) => StackSet i l a s sd -> a -> Maybe (WindowLocation i l a s sd)
findWindow (StackSet cur vis hid float) win =
listToMaybe . catMaybes $
map findWindowScreen (cur : vis) ++
map findWindowWorkspace hid ++
[findWindowFloat]
where
findWindowScreen s@(Screen ws _ _) =
if windowMemberOfWorkspace ws win
then Just (OnScreen s)
else Nothing
findWindowWorkspace w =
if windowMemberOfWorkspace w win
then Just (OnHiddenWorkspace w)
else Nothing
findWindowFloat =
if win `elem` Map.keys float
then Just Floating
else Nothing
windowMemberOfWorkspace :: (Eq a) => Workspace i l a -> a -> Bool
windowMemberOfWorkspace (Workspace _ _ s) w = w `elem` integrate' s
|
