    -----------------------------------------------------------------------------
    -- |
    -- Module      :  XMonad.Actions.DynamicWorkspaces
    -- Description :  Provides bindings to add and delete workspaces.
    -- Copyright   :  (c) David Roundy <droundy@darcs.net>
    -- License     :  BSD3-style (see LICENSE)
    --
    -- Maintainer  :  none
    -- Stability   :  unstable
    -- Portability :  unportable
    --
    -- Provides bindings to add and delete workspaces.
    --
    -----------------------------------------------------------------------------

    module XMonad.Actions.DynamicWorkspaces (
                                             -- * Usage
                                             -- $usage
                                             addWorkspace, addWorkspacePrompt,
                                             appendWorkspace, appendWorkspacePrompt,
                                             addWorkspaceAt,
                                             removeWorkspace,
                                             removeWorkspaceByTag,
                                             removeEmptyWorkspace,
                                             removeEmptyWorkspaceByTag,
                                             removeEmptyWorkspaceAfter,
                                             removeEmptyWorkspaceAfterExcept,
                                             addHiddenWorkspace, addHiddenWorkspaceAt,
                                             withWorkspace,
                                             selectWorkspace, renameWorkspace,
                                             renameWorkspaceByName,
                                             toNthWorkspace, withNthWorkspace,
                                             setWorkspaceIndex, withWorkspaceIndex,
                                             WorkspaceIndex
                                           ) where

    import XMonad.Prelude (find, isNothing, nub, when)
    import XMonad hiding (workspaces)
    import XMonad.StackSet hiding (filter, modify, delete)
    import XMonad.Prompt.Workspace ( Wor(Wor), workspacePrompt )
    import XMonad.Prompt ( XPConfig, mkComplFunFromList', mkXPrompt )
    import XMonad.Util.WorkspaceCompare ( getSortByIndex )
    import qualified Data.Map.Strict as Map
    import qualified XMonad.Util.ExtensibleState as XS

    -- $usage
    -- You can use this module with the following in your @xmonad.hs@ file:
    --
    -- > import XMonad.Actions.DynamicWorkspaces
    -- > import XMonad.Actions.CopyWindow(copy)
    --
    -- Then add keybindings like the following:
    --
    -- >   , ((modm .|. shiftMask, xK_BackSpace), removeWorkspace)
    -- >   , ((modm .|. shiftMask, xK_v      ), selectWorkspace def)
    -- >   , ((modm, xK_m                    ), withWorkspace def (windows . W.shift))
    -- >   , ((modm .|. shiftMask, xK_m      ), withWorkspace def (windows . copy))
    -- >   , ((modm .|. shiftMask, xK_r      ), renameWorkspace def)
    --
    -- > -- mod-[1..9]       %! Switch to workspace N in the list of workspaces
    -- > -- mod-shift-[1..9] %! Move client to workspace N in the list of workspaces
    -- >    ++
    -- >    zip (zip (repeat (modm)) [xK_1..xK_9]) (map (withNthWorkspace W.greedyView) [0..])
    -- >    ++
    -- >    zip (zip (repeat (modm .|. shiftMask)) [xK_1..xK_9]) (map (withNthWorkspace W.shift) [0..])
    --
    -- Alternatively, you can associate indexes (which don't depend of the
    -- workspace list order) to workspaces by using following keybindings:
    --
    -- > -- mod-[1..9]         %! Switch to workspace of index N
    -- > -- mod-control-[1..9] %! Set index N to the current workspace
    -- >    ++
    -- >    zip (zip (repeat (modm)) [xK_1..xK_9]) (map (withWorkspaceIndex W.greedyView) [1..])
    -- >    ++
    -- >    zip (zip (repeat (modm .|. controlMask)) [xK_1..xK_9]) (map (setWorkspaceIndex) [1..])
    --
    -- For detailed instructions on editing your key bindings, see
    -- <https://xmonad.org/TUTORIAL.html#customizing-xmonad the tutorial>. See also the documentation for
    -- "XMonad.Actions.CopyWindow", 'windows', 'shift', and 'XPConfig'.

    type WorkspaceTag = String
    -- | The workspace index is mapped to a workspace tag by the user and
    -- can be updated.
    type WorkspaceIndex  = Int

    -- | Internal dynamic project state that stores a mapping between
    --   workspace indexes and workspace tags.
    newtype DynamicWorkspaceState = DynamicWorkspaceState {DynamicWorkspaceState -> Map WorkspaceIndex String
    workspaceIndexMap :: Map.Map WorkspaceIndex WorkspaceTag}
      deriving (ReadPrec [DynamicWorkspaceState]
    ReadPrec DynamicWorkspaceState
    WorkspaceIndex -> ReadS DynamicWorkspaceState
    ReadS [DynamicWorkspaceState]
    (WorkspaceIndex -> ReadS DynamicWorkspaceState)
    -> ReadS [DynamicWorkspaceState]
    -> ReadPrec DynamicWorkspaceState
    -> ReadPrec [DynamicWorkspaceState]
    -> Read DynamicWorkspaceState
    forall a.
    (WorkspaceIndex -> ReadS a)
    -> ReadS [a] -> ReadPrec a -> ReadPrec [a] -> Read a
    $creadsPrec :: WorkspaceIndex -> ReadS DynamicWorkspaceState
    readsPrec :: WorkspaceIndex -> ReadS DynamicWorkspaceState
    $creadList :: ReadS [DynamicWorkspaceState]
    readList :: ReadS [DynamicWorkspaceState]
    $creadPrec :: ReadPrec DynamicWorkspaceState
    readPrec :: ReadPrec DynamicWorkspaceState
    $creadListPrec :: ReadPrec [DynamicWorkspaceState]
    readListPrec :: ReadPrec [DynamicWorkspaceState]
    Read, WorkspaceIndex -> DynamicWorkspaceState -> ShowS
    [DynamicWorkspaceState] -> ShowS
    DynamicWorkspaceState -> String
    (WorkspaceIndex -> DynamicWorkspaceState -> ShowS)
    -> (DynamicWorkspaceState -> String)
    -> ([DynamicWorkspaceState] -> ShowS)
    -> Show DynamicWorkspaceState
    forall a.
    (WorkspaceIndex -> a -> ShowS)
    -> (a -> String) -> ([a] -> ShowS) -> Show a
    $cshowsPrec :: WorkspaceIndex -> DynamicWorkspaceState -> ShowS
    showsPrec :: WorkspaceIndex -> DynamicWorkspaceState -> ShowS
    $cshow :: DynamicWorkspaceState -> String
    show :: DynamicWorkspaceState -> String
    $cshowList :: [DynamicWorkspaceState] -> ShowS
    showList :: [DynamicWorkspaceState] -> ShowS
    Show)

    instance ExtensionClass DynamicWorkspaceState where
      initialValue :: DynamicWorkspaceState
    initialValue = Map WorkspaceIndex String -> DynamicWorkspaceState
    DynamicWorkspaceState Map WorkspaceIndex String
    forall k a. Map k a
    Map.empty
      extensionType :: DynamicWorkspaceState -> StateExtension
    extensionType = DynamicWorkspaceState -> StateExtension
    forall a. (Read a, Show a, ExtensionClass a) => a -> StateExtension
    PersistentExtension

    -- | Set the index of the current workspace.
    setWorkspaceIndex :: WorkspaceIndex -> X ()
    setWorkspaceIndex :: WorkspaceIndex -> X ()
    setWorkspaceIndex WorkspaceIndex
    widx = do
      String
    wtag  <- (XState -> String) -> X String
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> String
    forall i l a s sd. StackSet i l a s sd -> i
    currentTag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> String)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
      Map WorkspaceIndex String
    wmap <- (DynamicWorkspaceState -> Map WorkspaceIndex String)
    -> X (Map WorkspaceIndex String)
    forall a (m :: * -> *) b.
    (ExtensionClass a, XLike m) =>
    (a -> b) -> m b
    XS.gets DynamicWorkspaceState -> Map WorkspaceIndex String
    workspaceIndexMap
      (DynamicWorkspaceState -> DynamicWorkspaceState) -> X ()
    forall a (m :: * -> *).
    (ExtensionClass a, XLike m) =>
    (a -> a) -> m ()
    XS.modify ((DynamicWorkspaceState -> DynamicWorkspaceState) -> X ())
    -> (DynamicWorkspaceState -> DynamicWorkspaceState) -> X ()
    forall a b. (a -> b) -> a -> b
    $ \DynamicWorkspaceState
    s -> DynamicWorkspaceState
    s {workspaceIndexMap = Map.insert widx wtag wmap}

    withWorkspaceIndex :: (String -> WindowSet -> WindowSet) -> WorkspaceIndex -> X ()
    withWorkspaceIndex :: (String
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> WorkspaceIndex -> X ()
    withWorkspaceIndex String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    job WorkspaceIndex
    widx = do
      Maybe String
    wtag <- WorkspaceIndex -> X (Maybe String)
    ilookup WorkspaceIndex
    widx
      X () -> (String -> X ()) -> Maybe String -> X ()
    forall b a. b -> (a -> b) -> Maybe a -> b
    maybe (() -> X ()
    forall a. a -> X a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()) ((StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((StackSet String (Layout Window) Window ScreenId ScreenDetail
      -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
     -> X ())
    -> (String
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> String
    -> X ()
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    job) Maybe String
    wtag
        where
          ilookup :: WorkspaceIndex -> X (Maybe WorkspaceTag)
          ilookup :: WorkspaceIndex -> X (Maybe String)
    ilookup WorkspaceIndex
    idx = WorkspaceIndex -> Map WorkspaceIndex String -> Maybe String
    forall k a. Ord k => k -> Map k a -> Maybe a
    Map.lookup WorkspaceIndex
    idx (Map WorkspaceIndex String -> Maybe String)
    -> X (Map WorkspaceIndex String) -> X (Maybe String)
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    <$> (DynamicWorkspaceState -> Map WorkspaceIndex String)
    -> X (Map WorkspaceIndex String)
    forall a (m :: * -> *) b.
    (ExtensionClass a, XLike m) =>
    (a -> b) -> m b
    XS.gets DynamicWorkspaceState -> Map WorkspaceIndex String
    workspaceIndexMap

    withWorkspace :: XPConfig -> (String -> X ()) -> X ()
    withWorkspace :: XPConfig -> (String -> X ()) -> X ()
    withWorkspace XPConfig
    c String -> X ()
    job = do [Workspace String (Layout Window) Window]
    ws <- (XState -> [Workspace String (Layout Window) Window])
    -> X [Workspace String (Layout Window) Window]
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> [Workspace String (Layout Window) Window]
    forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    workspaces (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> [Workspace String (Layout Window) Window])
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> [Workspace String (Layout Window) Window]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
                             WorkspaceSort
    sort <- X WorkspaceSort
    getSortByIndex
                             let ts :: [String]
    ts = (Workspace String (Layout Window) Window -> String)
    -> [Workspace String (Layout Window) Window] -> [String]
    forall a b. (a -> b) -> [a] -> [b]
    map Workspace String (Layout Window) Window -> String
    forall i l a. Workspace i l a -> i
    tag ([Workspace String (Layout Window) Window] -> [String])
    -> [Workspace String (Layout Window) Window] -> [String]
    forall a b. (a -> b) -> a -> b
    $ WorkspaceSort
    sort [Workspace String (Layout Window) Window]
    ws
                                 job' :: String -> X ()
    job' String
    t | String
    t String -> [String] -> Bool
    forall a. Eq a => a -> [a] -> Bool
    forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
    `elem` [String]
    ts = String -> X ()
    job String
    t
                                        | Bool
    otherwise = String -> X ()
    addHiddenWorkspace String
    t X () -> X () -> X ()
    forall a b. X a -> X b -> X b
    forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
    >> String -> X ()
    job String
    t
                             Wor -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
    forall p.
    XPrompt p =>
    p -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
    mkXPrompt (String -> Wor
    Wor String
    "") XPConfig
    c (XPConfig -> [String] -> ComplFunction
    mkComplFunFromList' XPConfig
    c [String]
    ts) String -> X ()
    job'

    renameWorkspace :: XPConfig -> X ()
    renameWorkspace :: XPConfig -> X ()
    renameWorkspace XPConfig
    conf = XPConfig -> (String -> X ()) -> X ()
    workspacePrompt XPConfig
    conf String -> X ()
    renameWorkspaceByName

    renameWorkspaceByName :: String -> X ()
    renameWorkspaceByName :: String -> X ()
    renameWorkspaceByName String
    w = do String
    old  <- (XState -> String) -> X String
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> String
    forall i l a s sd. StackSet i l a s sd -> i
    currentTag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> String)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
                                 (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((StackSet String (Layout Window) Window ScreenId ScreenDetail
      -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
     -> X ())
    -> (StackSet String (Layout Window) Window ScreenId ScreenDetail
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    forall a b. (a -> b) -> a -> b
    $ \StackSet String (Layout Window) Window ScreenId ScreenDetail
    s -> let sett :: Workspace i l a -> Workspace String l a
    sett Workspace i l a
    wk = Workspace i l a
    wk { tag = w }
                                                     setscr :: Screen i l a sid sd -> Screen String l a sid sd
    setscr Screen i l a sid sd
    scr = Screen i l a sid sd
    scr { workspace = sett $ workspace scr }
                                                     sets :: StackSet String l a sid sd -> StackSet String l a sid sd
    sets StackSet String l a sid sd
    q = StackSet String l a sid sd
    q { current = setscr $ current q }
                                                 in StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall {l} {a} {sid} {sd}.
    StackSet String l a sid sd -> StackSet String l a sid sd
    sets (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall a b. (a -> b) -> a -> b
    $ String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall i a l sid sd.
    (Eq i, Eq a) =>
    i -> StackSet i l a sid sd -> StackSet i l a sid sd
    removeWorkspace' String
    w StackSet String (Layout Window) Window ScreenId ScreenDetail
    s
                                 String -> String -> X ()
    forall {m :: * -> *}. XLike m => String -> String -> m ()
    updateIndexMap String
    old String
    w
      where updateIndexMap :: String -> String -> m ()
    updateIndexMap String
    oldIM String
    newIM = do
              Map WorkspaceIndex String
    wmap <- (DynamicWorkspaceState -> Map WorkspaceIndex String)
    -> m (Map WorkspaceIndex String)
    forall a (m :: * -> *) b.
    (ExtensionClass a, XLike m) =>
    (a -> b) -> m b
    XS.gets DynamicWorkspaceState -> Map WorkspaceIndex String
    workspaceIndexMap
              (DynamicWorkspaceState -> DynamicWorkspaceState) -> m ()
    forall a (m :: * -> *).
    (ExtensionClass a, XLike m) =>
    (a -> a) -> m ()
    XS.modify ((DynamicWorkspaceState -> DynamicWorkspaceState) -> m ())
    -> (DynamicWorkspaceState -> DynamicWorkspaceState) -> m ()
    forall a b. (a -> b) -> a -> b
    $ \DynamicWorkspaceState
    s -> DynamicWorkspaceState
    s {workspaceIndexMap = Map.map (\String
    t -> if String
    t String -> String -> Bool
    forall a. Eq a => a -> a -> Bool
    == String
    oldIM then String
    newIM else String
    t) wmap}

    toNthWorkspace :: (String -> X ()) -> Int -> X ()
    toNthWorkspace :: (String -> X ()) -> WorkspaceIndex -> X ()
    toNthWorkspace String -> X ()
    job WorkspaceIndex
    wnum = do WorkspaceSort
    sort <- X WorkspaceSort
    getSortByIndex
                                 [String]
    ws <- (XState -> [String]) -> X [String]
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets ((Workspace String (Layout Window) Window -> String)
    -> [Workspace String (Layout Window) Window] -> [String]
    forall a b. (a -> b) -> [a] -> [b]
    map Workspace String (Layout Window) Window -> String
    forall i l a. Workspace i l a -> i
    tag ([Workspace String (Layout Window) Window] -> [String])
    -> (XState -> [Workspace String (Layout Window) Window])
    -> XState
    -> [String]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . WorkspaceSort
    sort WorkspaceSort
    -> (XState -> [Workspace String (Layout Window) Window])
    -> XState
    -> [Workspace String (Layout Window) Window]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> [Workspace String (Layout Window) Window]
    forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    workspaces (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> [Workspace String (Layout Window) Window])
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> [Workspace String (Layout Window) Window]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
                                 case WorkspaceIndex -> [String] -> [String]
    forall a. WorkspaceIndex -> [a] -> [a]
    drop WorkspaceIndex
    wnum [String]
    ws of
                                   (String
    w:[String]
    _) -> String -> X ()
    job String
    w
                                   [] -> () -> X ()
    forall a. a -> X a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

    withNthWorkspace :: (String -> WindowSet -> WindowSet) -> Int -> X ()
    withNthWorkspace :: (String
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> WorkspaceIndex -> X ()
    withNthWorkspace String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    job WorkspaceIndex
    wnum = do WorkspaceSort
    sort <- X WorkspaceSort
    getSortByIndex
                                   [String]
    ws <- (XState -> [String]) -> X [String]
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets ((Workspace String (Layout Window) Window -> String)
    -> [Workspace String (Layout Window) Window] -> [String]
    forall a b. (a -> b) -> [a] -> [b]
    map Workspace String (Layout Window) Window -> String
    forall i l a. Workspace i l a -> i
    tag ([Workspace String (Layout Window) Window] -> [String])
    -> (XState -> [Workspace String (Layout Window) Window])
    -> XState
    -> [String]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . WorkspaceSort
    sort WorkspaceSort
    -> (XState -> [Workspace String (Layout Window) Window])
    -> XState
    -> [Workspace String (Layout Window) Window]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> [Workspace String (Layout Window) Window]
    forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    workspaces (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> [Workspace String (Layout Window) Window])
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> [Workspace String (Layout Window) Window]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
                                   case WorkspaceIndex -> [String] -> [String]
    forall a. WorkspaceIndex -> [a] -> [a]
    drop WorkspaceIndex
    wnum [String]
    ws of
                                     (String
    w:[String]
    _) -> (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((StackSet String (Layout Window) Window ScreenId ScreenDetail
      -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
     -> X ())
    -> (StackSet String (Layout Window) Window ScreenId ScreenDetail
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    forall a b. (a -> b) -> a -> b
    $ String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    job String
    w
                                     [] -> () -> X ()
    forall a. a -> X a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

    selectWorkspace :: XPConfig -> X ()
    selectWorkspace :: XPConfig -> X ()
    selectWorkspace XPConfig
    conf = XPConfig -> (String -> X ()) -> X ()
    workspacePrompt XPConfig
    conf ((String -> X ()) -> X ()) -> (String -> X ()) -> X ()
    forall a b. (a -> b) -> a -> b
    $ \String
    w ->
                           do StackSet String (Layout Window) Window ScreenId ScreenDetail
    s <- (XState
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X (StackSet String (Layout Window) Window ScreenId ScreenDetail)
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset
                              if String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> Bool
    forall i l a s sd. Eq i => i -> StackSet i l a s sd -> Bool
    tagMember String
    w StackSet String (Layout Window) Window ScreenId ScreenDetail
    s
                                then (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((StackSet String (Layout Window) Window ScreenId ScreenDetail
      -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
     -> X ())
    -> (StackSet String (Layout Window) Window ScreenId ScreenDetail
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    forall a b. (a -> b) -> a -> b
    $ String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall s i l a sd.
    (Eq s, Eq i) =>
    i -> StackSet i l a s sd -> StackSet i l a s sd
    greedyView String
    w
                                else String -> X ()
    addWorkspace String
    w

    -- | Add a new workspace with the given name, or do nothing if a
    --   workspace with the given name already exists; then switch to the
    --   newly created workspace.
    addWorkspace :: String -> X ()
    addWorkspace :: String -> X ()
    addWorkspace = (Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String -> X ()
    addWorkspaceAt (:)

    -- | Same as addWorkspace, but adds the workspace to the end of the list of workspaces
    appendWorkspace :: String -> X()
    appendWorkspace :: String -> X ()
    appendWorkspace = (Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String -> X ()
    addWorkspaceAt (([Workspace String (Layout Window) Window] -> WorkspaceSort)
    -> [Workspace String (Layout Window) Window] -> WorkspaceSort
    forall a b c. (a -> b -> c) -> b -> a -> c
    flip [Workspace String (Layout Window) Window] -> WorkspaceSort
    forall a. [a] -> [a] -> [a]
    (++) ([Workspace String (Layout Window) Window] -> WorkspaceSort)
    -> (Workspace String (Layout Window) Window
        -> [Workspace String (Layout Window) Window])
    -> Workspace String (Layout Window) Window
    -> WorkspaceSort
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . Workspace String (Layout Window) Window
    -> [Workspace String (Layout Window) Window]
    forall a. a -> [a]
    forall (m :: * -> *) a. Monad m => a -> m a
    return)

    -- | Adds a new workspace with the given name to the current list of workspaces.
    --   This function allows the user to pass a function that inserts an element
    --   into a list at an arbitrary spot.
    addWorkspaceAt :: (WindowSpace -> [WindowSpace] -> [WindowSpace]) -> String -> X ()
    addWorkspaceAt :: (Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String -> X ()
    addWorkspaceAt Workspace String (Layout Window) Window -> WorkspaceSort
    add String
    newtag = (Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String -> X ()
    addHiddenWorkspaceAt Workspace String (Layout Window) Window -> WorkspaceSort
    add String
    newtag X () -> X () -> X ()
    forall a b. X a -> X b -> X b
    forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
    >> (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows (String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall s i l a sd.
    (Eq s, Eq i) =>
    i -> StackSet i l a s sd -> StackSet i l a s sd
    greedyView String
    newtag)

    -- | Prompt for the name of a new workspace, add it if it does not
    --   already exist, and switch to it.
    addWorkspacePrompt :: XPConfig -> X ()
    addWorkspacePrompt :: XPConfig -> X ()
    addWorkspacePrompt XPConfig
    conf = Wor -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
    forall p.
    XPrompt p =>
    p -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
    mkXPrompt (String -> Wor
    Wor String
    "New workspace name: ") XPConfig
    conf (IO [String] -> ComplFunction
    forall a b. a -> b -> a
    const ([String] -> IO [String]
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return [])) String -> X ()
    addWorkspace

    -- | Prompt for the name of a new workspace, appending it to the end of the list of workspaces
    --   if it does not already exist, and switch to it.
    appendWorkspacePrompt :: XPConfig -> X ()
    appendWorkspacePrompt :: XPConfig -> X ()
    appendWorkspacePrompt XPConfig
    conf = Wor -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
    forall p.
    XPrompt p =>
    p -> XPConfig -> ComplFunction -> (String -> X ()) -> X ()
    mkXPrompt (String -> Wor
    Wor String
    "New workspace name: ") XPConfig
    conf (IO [String] -> ComplFunction
    forall a b. a -> b -> a
    const ([String] -> IO [String]
    forall a. a -> IO a
    forall (m :: * -> *) a. Monad m => a -> m a
    return [])) String -> X ()
    appendWorkspace

    -- | Add a new hidden workspace with the given name, or do nothing if
    --   a workspace with the given name already exists. Takes a function to insert
    --   the workspace at an arbitrary spot in the list.
    addHiddenWorkspaceAt :: (WindowSpace -> [WindowSpace] -> [WindowSpace]) -> String -> X ()
    addHiddenWorkspaceAt :: (Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String -> X ()
    addHiddenWorkspaceAt Workspace String (Layout Window) Window -> WorkspaceSort
    add String
    newtag =
      X Bool -> X () -> X ()
    whenX ((XState -> Bool) -> X Bool
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (Bool -> Bool
    not (Bool -> Bool) -> (XState -> Bool) -> XState -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> Bool
    forall i l a s sd. Eq i => i -> StackSet i l a s sd -> Bool
    tagMember String
    newtag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> Bool)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)) (X () -> X ()) -> X () -> X ()
    forall a b. (a -> b) -> a -> b
    $ do
        Layout Window
    l <- (XConf -> Layout Window) -> X (Layout Window)
    forall r (m :: * -> *) a. MonadReader r m => (r -> a) -> m a
    asks (XConfig Layout -> Layout Window
    forall (l :: * -> *). XConfig l -> l Window
    layoutHook (XConfig Layout -> Layout Window)
    -> (XConf -> XConfig Layout) -> XConf -> Layout Window
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XConf -> XConfig Layout
    config)
        (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String
    -> Layout Window
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall i l a sid sd.
    (Workspace i l a -> [Workspace i l a] -> [Workspace i l a])
    -> i -> l -> StackSet i l a sid sd -> StackSet i l a sid sd
    addHiddenWorkspace' Workspace String (Layout Window) Window -> WorkspaceSort
    add String
    newtag Layout Window
    l)

    -- | Add a new hidden workspace with the given name, or do nothing if
    --   a workspace with the given name already exists.
    addHiddenWorkspace :: String -> X ()
    addHiddenWorkspace :: String -> X ()
    addHiddenWorkspace = (Workspace String (Layout Window) Window -> WorkspaceSort)
    -> String -> X ()
    addHiddenWorkspaceAt (:)

    -- | Remove the current workspace if it contains no windows.
    removeEmptyWorkspace :: X ()
    removeEmptyWorkspace :: X ()
    removeEmptyWorkspace = (XState -> String) -> X String
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> String
    forall i l a s sd. StackSet i l a s sd -> i
    currentTag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> String)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset) X String -> (String -> X ()) -> X ()
    forall a b. X a -> (a -> X b) -> X b
    forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
    >>= String -> X ()
    removeEmptyWorkspaceByTag

    -- | Remove the current workspace.
    removeWorkspace :: X ()
    removeWorkspace :: X ()
    removeWorkspace = (XState -> String) -> X String
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> String
    forall i l a s sd. StackSet i l a s sd -> i
    currentTag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> String)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset) X String -> (String -> X ()) -> X ()
    forall a b. X a -> (a -> X b) -> X b
    forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
    >>= String -> X ()
    removeWorkspaceByTag

    -- | Remove workspace with specific tag if it contains no windows.
    removeEmptyWorkspaceByTag :: String -> X ()
    removeEmptyWorkspaceByTag :: String -> X ()
    removeEmptyWorkspaceByTag String
    t = X Bool -> X () -> X ()
    whenX (String -> X Bool
    isEmpty String
    t) (X () -> X ()) -> X () -> X ()
    forall a b. (a -> b) -> a -> b
    $ String -> X ()
    removeWorkspaceByTag String
    t

    -- | Remove workspace with specific tag.
    removeWorkspaceByTag :: String -> X ()
    removeWorkspaceByTag :: String -> X ()
    removeWorkspaceByTag String
    torem = do
        StackSet String (Layout Window) Window ScreenId ScreenDetail
    s <- (XState
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X (StackSet String (Layout Window) Window ScreenId ScreenDetail)
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset
        case StackSet String (Layout Window) Window ScreenId ScreenDetail
    s of
            StackSet { current :: forall i l a sid sd. StackSet i l a sid sd -> Screen i l a sid sd
    current = Screen { workspace :: forall i l a sid sd. Screen i l a sid sd -> Workspace i l a
    workspace = Workspace String (Layout Window) Window
    cur }, hidden :: forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    hidden = (Workspace String (Layout Window) Window
    w:[Workspace String (Layout Window) Window]
    _) } -> do
                    Bool -> X () -> X ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when (String
    toremString -> String -> Bool
    forall a. Eq a => a -> a -> Bool
    ==Workspace String (Layout Window) Window -> String
    forall i l a. Workspace i l a -> i
    tag Workspace String (Layout Window) Window
    cur) (X () -> X ()) -> X () -> X ()
    forall a b. (a -> b) -> a -> b
    $ (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((StackSet String (Layout Window) Window ScreenId ScreenDetail
      -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
     -> X ())
    -> (StackSet String (Layout Window) Window ScreenId ScreenDetail
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    forall a b. (a -> b) -> a -> b
    $ String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall s i l a sd.
    (Eq s, Eq i) =>
    i -> StackSet i l a s sd -> StackSet i l a s sd
    view (String
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall a b. (a -> b) -> a -> b
    $ Workspace String (Layout Window) Window -> String
    forall i l a. Workspace i l a -> i
    tag Workspace String (Layout Window) Window
    w
                    (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    windows ((StackSet String (Layout Window) Window ScreenId ScreenDetail
      -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
     -> X ())
    -> (StackSet String (Layout Window) Window ScreenId ScreenDetail
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> X ()
    forall a b. (a -> b) -> a -> b
    $ String
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    forall i a l sid sd.
    (Eq i, Eq a) =>
    i -> StackSet i l a sid sd -> StackSet i l a sid sd
    removeWorkspace' String
    torem
            StackSet String (Layout Window) Window ScreenId ScreenDetail
    _ -> () -> X ()
    forall a. a -> X a
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

    -- | Remove the current workspace after an operation if it is empty and hidden.
    --   Can be used to remove a workspace if it is empty when leaving it. The
    --   operation may only change workspace once, otherwise the workspace will not
    --   be removed.
    removeEmptyWorkspaceAfter :: X () -> X ()
    removeEmptyWorkspaceAfter :: X () -> X ()
    removeEmptyWorkspaceAfter = [String] -> X () -> X ()
    removeEmptyWorkspaceAfterExcept []

    -- | Like 'removeEmptyWorkspaceAfter' but use a list of sticky workspaces,
    --   whose entries will never be removed.
    removeEmptyWorkspaceAfterExcept :: [String] -> X () -> X ()
    removeEmptyWorkspaceAfterExcept :: [String] -> X () -> X ()
    removeEmptyWorkspaceAfterExcept [String]
    sticky X ()
    f = do
        String
    before <- (XState -> String) -> X String
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> String
    forall i l a s sd. StackSet i l a s sd -> i
    currentTag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> String)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
        X ()
    f
        String
    after <- (XState -> String) -> X String
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets (StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> String
    forall i l a s sd. StackSet i l a s sd -> i
    currentTag (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> String)
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> String
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset)
        Bool -> X () -> X ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when (String
    beforeString -> String -> Bool
    forall a. Eq a => a -> a -> Bool
    /=String
    after Bool -> Bool -> Bool
    && String
    before String -> [String] -> Bool
    forall (t :: * -> *) a. (Foldable t, Eq a) => a -> t a -> Bool
    `notElem` [String]
    sticky) (X () -> X ()) -> X () -> X ()
    forall a b. (a -> b) -> a -> b
    $ String -> X ()
    removeEmptyWorkspaceByTag String
    before

    isEmpty :: String -> X Bool
    isEmpty :: String -> X Bool
    isEmpty String
    t = do [Workspace String (Layout Window) Window]
    wsl <- (XState -> [Workspace String (Layout Window) Window])
    -> X [Workspace String (Layout Window) Window]
    forall s (m :: * -> *) a. MonadState s m => (s -> a) -> m a
    gets ((XState -> [Workspace String (Layout Window) Window])
     -> X [Workspace String (Layout Window) Window])
    -> (XState -> [Workspace String (Layout Window) Window])
    -> X [Workspace String (Layout Window) Window]
    forall a b. (a -> b) -> a -> b
    $ StackSet String (Layout Window) Window ScreenId ScreenDetail
    -> [Workspace String (Layout Window) Window]
    forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    workspaces (StackSet String (Layout Window) Window ScreenId ScreenDetail
     -> [Workspace String (Layout Window) Window])
    -> (XState
        -> StackSet String (Layout Window) Window ScreenId ScreenDetail)
    -> XState
    -> [Workspace String (Layout Window) Window]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . XState
    -> StackSet String (Layout Window) Window ScreenId ScreenDetail
    windowset
                   let mws :: Maybe (Workspace String (Layout Window) Window)
    mws = (Workspace String (Layout Window) Window -> Bool)
    -> [Workspace String (Layout Window) Window]
    -> Maybe (Workspace String (Layout Window) Window)
    forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Maybe a
    find (\Workspace String (Layout Window) Window
    ws -> Workspace String (Layout Window) Window -> String
    forall i l a. Workspace i l a -> i
    tag Workspace String (Layout Window) Window
    ws String -> String -> Bool
    forall a. Eq a => a -> a -> Bool
    == String
    t) [Workspace String (Layout Window) Window]
    wsl
                   Bool -> X Bool
    forall a. a -> X a
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Bool -> X Bool) -> Bool -> X Bool
    forall a b. (a -> b) -> a -> b
    $ Bool
    -> (Workspace String (Layout Window) Window -> Bool)
    -> Maybe (Workspace String (Layout Window) Window)
    -> Bool
    forall b a. b -> (a -> b) -> Maybe a -> b
    maybe Bool
    True (Maybe (Stack Window) -> Bool
    forall a. Maybe a -> Bool
    isNothing (Maybe (Stack Window) -> Bool)
    -> (Workspace String (Layout Window) Window
        -> Maybe (Stack Window))
    -> Workspace String (Layout Window) Window
    -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . Workspace String (Layout Window) Window -> Maybe (Stack Window)
    forall i l a. Workspace i l a -> Maybe (Stack a)
    stack) Maybe (Workspace String (Layout Window) Window)
    mws

    addHiddenWorkspace' :: (Workspace i l a -> [Workspace i l a] -> [Workspace i l a]) -> i -> l -> StackSet i l a sid sd -> StackSet i l a sid sd
    addHiddenWorkspace' :: forall i l a sid sd.
    (Workspace i l a -> [Workspace i l a] -> [Workspace i l a])
    -> i -> l -> StackSet i l a sid sd -> StackSet i l a sid sd
    addHiddenWorkspace' Workspace i l a -> [Workspace i l a] -> [Workspace i l a]
    add i
    newtag l
    l s :: StackSet i l a sid sd
    s@StackSet{ hidden :: forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    hidden = [Workspace i l a]
    ws } = StackSet i l a sid sd
    s { hidden = add (Workspace newtag l Nothing) ws }

    -- | Remove the hidden workspace with the given tag from the StackSet, if
    --   it exists. All the windows in that workspace are moved to the current
    --   workspace.
    removeWorkspace' :: (Eq i, Eq a) => i -> StackSet i l a sid sd -> StackSet i l a sid sd
    removeWorkspace' :: forall i a l sid sd.
    (Eq i, Eq a) =>
    i -> StackSet i l a sid sd -> StackSet i l a sid sd
    removeWorkspace' i
    torem s :: StackSet i l a sid sd
    s@StackSet{ current :: forall i l a sid sd. StackSet i l a sid sd -> Screen i l a sid sd
    current = scr :: Screen i l a sid sd
    scr@Screen { workspace :: forall i l a sid sd. Screen i l a sid sd -> Workspace i l a
    workspace = Workspace i l a
    wc }
                                     , hidden :: forall i l a s sd. StackSet i l a s sd -> [Workspace i l a]
    hidden  = [Workspace i l a]
    hs }
        = let ([Workspace i l a]
    xs, [Workspace i l a]
    ys) = (Workspace i l a -> Bool)
    -> [Workspace i l a] -> ([Workspace i l a], [Workspace i l a])
    forall a. (a -> Bool) -> [a] -> ([a], [a])
    break ((i -> i -> Bool
    forall a. Eq a => a -> a -> Bool
    == i
    torem) (i -> Bool) -> (Workspace i l a -> i) -> Workspace i l a -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . Workspace i l a -> i
    forall i l a. Workspace i l a -> i
    tag) [Workspace i l a]
    hs
          in [Workspace i l a] -> [Workspace i l a] -> StackSet i l a sid sd
    removeWorkspace'' [Workspace i l a]
    xs [Workspace i l a]
    ys
       where meld :: Maybe (Stack a) -> Maybe (Stack a) -> Maybe (Stack a)
    meld Maybe (Stack a)
    Nothing Maybe (Stack a)
    Nothing = Maybe (Stack a)
    forall a. Maybe a
    Nothing
             meld Maybe (Stack a)
    x Maybe (Stack a)
    Nothing = Maybe (Stack a)
    x
             meld Maybe (Stack a)
    Nothing Maybe (Stack a)
    x = Maybe (Stack a)
    x
             meld (Just Stack a
    x) (Just Stack a
    y) = [a] -> Maybe (Stack a)
    forall a. [a] -> Maybe (Stack a)
    differentiate ([a] -> Maybe (Stack a)) -> ([a] -> [a]) -> [a] -> Maybe (Stack a)
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . [a] -> [a]
    forall a. Eq a => [a] -> [a]
    nub ([a] -> Maybe (Stack a)) -> [a] -> Maybe (Stack a)
    forall a b. (a -> b) -> a -> b
    $ Stack a -> [a]
    forall a. Stack a -> [a]
    integrate Stack a
    x [a] -> [a] -> [a]
    forall a. [a] -> [a] -> [a]
    ++ Stack a -> [a]
    forall a. Stack a -> [a]
    integrate Stack a
    y
             removeWorkspace'' :: [Workspace i l a] -> [Workspace i l a] -> StackSet i l a sid sd
    removeWorkspace'' [Workspace i l a]
    xs (Workspace i l a
    y:[Workspace i l a]
    ys) = StackSet i l a sid sd
    s { current = scr { workspace = wc { stack = meld (stack y) (stack wc) } }
                                             , hidden = xs ++ ys }
             removeWorkspace'' [Workspace i l a]
    _  [Workspace i l a]
    _      = StackSet i l a sid sd
    s