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-- Common ways to select workspaces
module Rahm.Desktop.Workspaces
( getPopulatedWorkspaces,
next,
prev,
lastWorkspaceId,
firstWorkspaceId,
windowsInCurrentWorkspace,
getOrderedScreens,
accompanyingWorkspace,
adjacentWorkspaceNotVisible,
adjacentWorkspace,
viewAdjacent,
viewAdjacentTo,
withScreen,
workspaceWithWindow,
getWorkspaceToTheRight,
getWorkspaceToTheLeft,
getWorkspaceAbove,
getWorkspaceBelow,
WorkspaceState (..),
)
where
import Control.Arrow (Arrow ((&&&)))
import Control.Monad.Trans (lift)
import Control.Monad.Trans.Maybe (MaybeT (MaybeT))
import Data.Char (chr, isDigit, isUpper, ord, toLower, toUpper)
import Data.Int (Int32)
import Data.List (find, sort, sortBy, sortOn, (\\))
import Data.List.Safe ((!!))
import Data.Maybe (fromMaybe, listToMaybe, mapMaybe)
import Rahm.Desktop.Common (getCurrentWorkspace, gotoWorkspace, runMaybeT_)
import Rahm.Desktop.Geometry
import Rahm.Desktop.Logger
import qualified Rahm.Desktop.StackSet as W
import XMonad
( Rectangle (Rectangle),
ScreenDetail (SD),
ScreenId,
Window,
WindowSet,
WorkspaceId,
X,
windows,
withWindowSet,
)
import Prelude hiding ((!!))
newtype Selector = Selector (forall a. (a -> Bool) -> [a] -> Maybe a)
data WorkspaceState = Current | Hidden | Visible
deriving (Ord, Eq, Enum)
-- Returns all the workspaces that are either visible, current or Hidden but
-- have windows and that workspace's state.
--
-- In other words, filters out workspaces that have no windows and are not
-- visible.
--
-- This function will sort the result by the workspace tag.
getPopulatedWorkspaces ::
W.StackSet String l a sid sd -> [(WorkspaceState, W.Workspace String l a)]
getPopulatedWorkspaces (W.StackSet (W.Screen cur _ _) vis hi _) =
filter ((/= "*") . W.tag . snd) $
sortOn (W.tag . snd) $
mapMaybe (\w@(W.Workspace _ _ s) -> fmap (const (Hidden, w)) s) hi
++ map (\(W.Screen w _ _) -> (Visible, w)) vis
++ [(Current, cur)]
next :: Selector
next = Selector $ \f l -> select f l l
where
select f (x : y : xs) _ | f x = Just y
select f [x] (y : _) | f x = Just y
select f (x : xs) orig = select f xs orig
select f _ _ = Nothing
prev :: Selector
prev = Selector $ \f l ->
let (Selector fn) = next in fn f (reverse l)
lastWorkspaceId :: X WorkspaceId
lastWorkspaceId =
W.tag . snd . last <$> withWindowSet (return . getPopulatedWorkspaces)
firstWorkspaceId :: X WorkspaceId
firstWorkspaceId =
W.tag . snd . head <$> withWindowSet (return . getPopulatedWorkspaces)
windowsInCurrentWorkspace :: X [Window]
windowsInCurrentWorkspace = withWindowSet $
\(W.StackSet (W.Screen (W.Workspace _ _ s) _ _) _ _ _) -> do
return $ W.integrate' s
getOrderedScreens ::
W.StackSet wid l a ScreenId ScreenDetail ->
[(Bool, W.Screen wid l a ScreenId ScreenDetail)]
-- ^ Returns a list of screens ordered top to bottom, left to right (based on center point).
getOrderedScreens windowSet =
flip sortBy screens $ \(b1, sc1) (b2, sc2) ->
let (SD (Rectangle x1 y1 w1 h1)) = W.screenDetail sc1
(SD (Rectangle x2 y2 w2 h2)) = W.screenDetail sc2
xCenter1 = fromIntegral x1 + (fromIntegral w1 / 2)
yCenter1 = fromIntegral y1 + (fromIntegral h1 / 2)
xCenter2 = fromIntegral x2 + (fromIntegral w2 / 2)
yCenter2 = fromIntegral y2 + (fromIntegral h2 / 2)
in case yCenter1 `compare` yCenter2 of
EQ -> xCenter1 `compare` xCenter2
other -> other
where
screens = (True, W.current windowSet) : map (False,) (W.visible windowSet)
accompanyingWorkspace :: WorkspaceId -> WorkspaceId
accompanyingWorkspace [s]
| isDigit s = show (fl (ord s - ord '0'))
where
fl x | even x = x + 1
fl x = x - 1
accompanyingWorkspace [s] =
return $
if isUpper s
then toLower s
else toUpper s
accompanyingWorkspace s = s
adjacentWorkspaceNotVisible :: Selector -> WorkspaceId -> X WorkspaceId
adjacentWorkspaceNotVisible (Selector selector) from =
withWindowSet $ \ss ->
let tags =
sort $
W.tag . snd
<$> filter
(\x -> fst x /= Visible)
( getPopulatedWorkspaces ss
)
in return $ fromMaybe from $ selector (== from) tags
adjacentWorkspace :: Selector -> WorkspaceId -> X WorkspaceId
adjacentWorkspace (Selector selector) from =
withWindowSet $ \ss ->
let tags = sort $ W.tag . snd <$> getPopulatedWorkspaces ss
in return $ fromMaybe from $ selector (== from) tags
viewAdjacent :: Selector -> X ()
viewAdjacent sel =
gotoWorkspace =<< (adjacentWorkspaceNotVisible sel =<< getCurrentWorkspace)
viewAdjacentTo :: X (Maybe WorkspaceId) -> Selector -> X ()
viewAdjacentTo wsM (Selector sel) = runMaybeT_ $ do
lift $ logs Debug "viewAdjacentTo"
tag <- MaybeT wsM
lift $ logs Debug "from: %s" tag
ws <- MaybeT $
withWindowSet $ \ws ->
let vis = map (W.tag . W.workspace) (W.screens ws)
allW = sort $ map (W.tag . snd) (getPopulatedWorkspaces ws)
final = allW \\ (vis \\ [tag])
in return $ sel (== tag) final
lift $ logs Debug "to: %s" ws
lift $ windows $ W.switchWorkspaces tag ws
adjacentScreen :: Selector -> X WorkspaceId
adjacentScreen (Selector f) = do
(screens, current) <-
withWindowSet $ return . (getOrderedScreens &&& W.current)
return $ W.tag $ W.workspace $ maybe current snd (f fst screens)
withScreen :: (WorkspaceId -> WindowSet -> WindowSet) -> Int -> X ()
withScreen fn n = do
windows $ \windowSet ->
case map snd (getOrderedScreens windowSet) !! n of
Nothing -> windowSet
Just screen -> fn (W.tag $ W.workspace screen) windowSet
workspaceWithWindow :: Window -> X (Maybe WorkspaceId)
workspaceWithWindow wid = withWindowSet $ \(W.StackSet c v h _) ->
return $
W.tag
<$> find
(\(W.Workspace _ _ stack) -> wid `elem` W.integrate' stack)
(map W.workspace (c : v) ++ h)
getScreenRectangles :: X [(GeomRectangle, WorkspaceId)]
getScreenRectangles =
withWindowSet $ \(W.StackSet cur vis _ _) -> do
return $ ofScreen cur : map ofScreen vis
where
ofScreen (W.Screen (W.tag -> t) _ (SD rect)) = (toGeom rect, t)
toGeom (Rectangle x y w h) =
GeomRectangle
(fromIntegral x)
(fromIntegral y)
(fromIntegral w)
(fromIntegral h)
getScreenRect :: WorkspaceId -> X (Maybe GeomRectangle)
getScreenRect w = do
rects <- getScreenRectangles
return $ listToMaybe [r | (r, w') <- rects, w' == w]
getWorkspaceToTheRight :: WorkspaceId -> MaybeT X WorkspaceId
getWorkspaceToTheRight w = do
refRect <- lift $ getScreenRect w
rects <- lift getScreenRectangles
MaybeT $ return (snd <$> closestInDirection rects w E)
getWorkspaceToTheLeft :: WorkspaceId -> MaybeT X WorkspaceId
getWorkspaceToTheLeft w = do
refRect <- lift $ getScreenRect w
rects <- lift getScreenRectangles
MaybeT $ return (snd <$> closestInDirection rects w W)
getWorkspaceAbove :: WorkspaceId -> MaybeT X WorkspaceId
getWorkspaceAbove w = do
refRect <- lift $ getScreenRect w
rects <- lift getScreenRectangles
MaybeT $ return (snd <$> closestInDirection rects w N)
getWorkspaceBelow :: WorkspaceId -> MaybeT X WorkspaceId
getWorkspaceBelow w = do
refRect <- lift $ getScreenRect w
rects <- lift getScreenRectangles
MaybeT $ return (snd <$> closestInDirection rects w S)
|
