X.A.CycleWS: Deprecated WSType Data Constructors

By deprecating everything except `WSIs` and adding constructors to
logically combine `WSType` values, we can have a more flexible interface.
Adding anything to the old interface would mean going through `WSIs`, and
all old constructors can be implemented of terms of `WSIs`.

CHANGES.md

@@ -113,6 +113,11 @@
 
     - Removed the `Wrap` and `NextLayoutNoWrap` data constructors.
 
+  - `XMonad.Actions.CycleWS`
+
+    - Deprecated `EmptyWS`, `HiddenWS`, `NonEmptyWS`, `HiddenNonEmptyWS`,
+      `HiddenEmptyWS`, `AnyWS` and `WSTagGroup`
+
 ### New Modules
 
   * `XMonad.Hooks.StatusBar.PP`
@@ -630,6 +635,14 @@
     - Added `copiesPP` to make a `PP` aware of copies of the focused
       window.
 
+  - `XMonad.Actions.CycleWS`
+
+    - Added `:&:`, `:|:` and `Not` data constructors to `WSType` to logically
+      combine predicates.
+
+    - Added `hiddenWS`, `emptyWS` and `anyWS` to replace deprecated
+      constructors.
+
 ## 0.16
 
 ### Breaking Changes

XMonad/Actions/CycleWS.hs

@@ -18,13 +18,13 @@
 --
 -- Note that this module now subsumes the functionality of the former
 -- @XMonad.Actions.RotView@.  Former users of @rotView@ can simply replace
--- @rotView True@ with @moveTo Next NonEmptyWS@, and so on.
+-- @rotView True@ with @moveTo Next (Not emptyWS)@, and so on.
 --
 -- If you want to exactly replicate the action of @rotView@ (cycling
 -- through workspace in order lexicographically by tag, instead of in
 -- the order specified in the config), it can be implemented as:
 --
--- > rotView b  = do t <- findWorkspace getSortByTag (bToDir b) NonEmptyWS 1
+-- > rotView b  = do t <- findWorkspace getSortByTag (bToDir b) (Not emptyWS) 1
 -- >                 windows . greedyView $ t
 -- >   where bToDir True  = Next
 -- >         bToDir False = Prev
@@ -63,6 +63,10 @@ module XMonad.Actions.CycleWS (
 
                               , Direction1D(..)
                               , WSType(..)
+                              , emptyWS
+                              , hiddenWS
+                              , anyWS
+                              , wsTagGroup
 
                               , shiftTo
                               , moveTo
@@ -78,7 +82,7 @@ module XMonad.Actions.CycleWS (
 
                              ) where
 
-import XMonad.Prelude (find, findIndex, isJust, isNothing)
+import XMonad.Prelude (find, findIndex, isJust, isNothing, liftM2)
 import XMonad hiding (workspaces)
 import qualified XMonad.Hooks.WorkspaceHistory as WH
 import XMonad.StackSet hiding (filter)
@@ -110,9 +114,9 @@ import XMonad.Util.WorkspaceCompare
 -- You can also get fancier with 'moveTo', 'shiftTo', and 'findWorkspace'.
 -- For example:
 --
--- >   , ((modm     , xK_f), moveTo Next EmptyWS)  -- find a free workspace
+-- >   , ((modm     , xK_f), moveTo Next emptyWS)  -- find a free workspace
 -- >   , ((modm .|. controlMask, xK_Right),        -- a crazy keybinding!
--- >         do t <- findWorkspace getSortByXineramaRule Next NonEmptyWS 2
+-- >         do t <- findWorkspace getSortByXineramaRule Next (Not emptyWS) 2
 -- >            windows . view $ t                                         )
 --
 -- For detailed instructions on editing your key bindings, see
@@ -211,7 +215,7 @@ shiftBy :: Int -> X ()
 shiftBy d = wsBy d >>= windows . shift
 
 wsBy :: Int -> X WorkspaceId
-wsBy = findWorkspace getSortByIndex Next AnyWS
+wsBy = findWorkspace getSortByIndex Next anyWS
 
 {- $taketwo
 
@@ -220,7 +224,7 @@ through subsets of workspaces.
 
 For example,
 
->   moveTo Next EmptyWS
+>   moveTo Next emptyWS
 
 will move to the first available workspace with no windows, and
 
@@ -231,6 +235,13 @@ the letter 'p' in its name. =)
 
 -}
 
+{-# DEPRECATED EmptyWS             "Use emptyWS instead." #-}
+{-# DEPRECATED HiddenWS            "Use hiddenWS instead." #-}
+{-# DEPRECATED NonEmptyWS          "Use Not emptyWS instead." #-}
+{-# DEPRECATED HiddenNonEmptyWS    "Use hiddenWS :&: Not emptyWS instead." #-}
+{-# DEPRECATED HiddenEmptyWS       "Use hiddenWS :&: emptyWS instead." #-}
+{-# DEPRECATED AnyWS               "Use anyWS instead." #-}
+{-# DEPRECATED WSTagGroup          "Use wsTagGroup instead." #-}
 -- | What type of workspaces should be included in the cycle?
 data WSType = EmptyWS     -- ^ cycle through empty workspaces
             | NonEmptyWS  -- ^ cycle through non-empty workspaces
@@ -245,6 +256,11 @@ data WSType = EmptyWS     -- ^ cycle through empty workspaces
             | WSIs (X (WindowSpace -> Bool))
                           -- ^ cycle through workspaces satisfying
                           --   an arbitrary predicate
+            | WSType :&: WSType -- ^ cycle through workspaces satisfying both
+                                --   predicates.
+            | WSType :|: WSType -- ^ cycle through workspaces satisfying one of
+                                --   the predicates.
+            | Not WSType -- ^ cycle through workspaces not satisfying the predicate
 
 -- | Convert a WSType value to a predicate on workspaces.
 wsTypeToPred :: WSType -> X (WindowSpace -> Bool)
@@ -262,7 +278,34 @@ wsTypeToPred AnyWS      = return (const True)
 wsTypeToPred (WSTagGroup sep) = do cur <- groupName.workspace.current <$> gets windowset
                                    return $ (cur ==).groupName
                                    where groupName = takeWhile (/=sep).tag
-wsTypeToPred (WSIs p)   = p
+wsTypeToPred (WSIs p ) = p
+wsTypeToPred (p :&: q) = liftM2 (&&) <$> wsTypeToPred p <*> wsTypeToPred q
+wsTypeToPred (p :|: q) = liftM2 (||) <$> wsTypeToPred p <*> wsTypeToPred q
+wsTypeToPred (Not p  ) = fmap not <$> wsTypeToPred p
+
+-- | Cycle through empty workspaces
+emptyWS :: WSType
+emptyWS = WSIs . return $ isNothing . stack
+
+-- | Cycle through non-visible workspaces
+hiddenWS :: WSType
+hiddenWS = WSIs $ do
+  hs <- gets (map tag . hidden . windowset)
+  return $ (`elem` hs) . tag
+
+-- | Cycle through all workspaces
+anyWS :: WSType
+anyWS = WSIs . return $ const True
+
+-- | Cycle through workspaces in the same group, the
+--   group name is all characters up to the first
+--   separator character or the end of the tag
+wsTagGroup :: Char -> WSType
+wsTagGroup sep = WSIs $ do
+  cur <- groupName . workspace . current <$> gets windowset
+  return $ (cur ==) . groupName
+  where groupName = takeWhile (/= sep) . tag
+
 
 -- | View the next workspace in the given direction that satisfies
 --   the given condition.

XMonad/Actions/SwapWorkspaces.hs

@@ -53,7 +53,7 @@ swapWithCurrent t s = swapWorkspaces t (currentTag s) s
 -- | Say @swapTo Next@ or @swapTo Prev@ to move your current workspace.
 -- This is an @X ()@ so can be hooked up to your keybindings directly.
 swapTo :: Direction1D -> X ()
-swapTo dir = findWorkspace getSortByIndex dir AnyWS 1 >>= windows . swapWithCurrent
+swapTo dir = findWorkspace getSortByIndex dir anyWS 1 >>= windows . swapWithCurrent
 
 -- | Takes two workspace tags and an existing XMonad.StackSet and returns a new
 --   one with the two corresponding workspaces' tags swapped.

XMonad/Actions/WorkspaceNames.hs

@@ -48,7 +48,7 @@ import XMonad.Prelude (fromMaybe, isInfixOf, (<&>), (>=>))
 import qualified XMonad.StackSet as W
 import qualified XMonad.Util.ExtensibleState as XS
 
-import XMonad.Actions.CycleWS (findWorkspace, WSType(..), Direction1D(..))
+import XMonad.Actions.CycleWS (findWorkspace, WSType(..), Direction1D(..), anyWS)
 import qualified XMonad.Actions.SwapWorkspaces as Swap
 import XMonad.Hooks.DynamicLog (PP(..))
 import XMonad.Prompt (mkXPrompt, XPConfig)
@@ -141,7 +141,7 @@ workspaceNamesPP pp = getWorkspaceNames ":" <&> \ren -> pp{ ppRename = ppRename
 
 -- | See 'XMonad.Actions.SwapWorkspaces.swapTo'. This is the same with names.
 swapTo :: Direction1D -> X ()
-swapTo dir = swapTo' dir AnyWS
+swapTo dir = swapTo' dir anyWS
 
 -- | Swap with the previous or next workspace of the given type.
 swapTo' :: Direction1D -> WSType -> X ()

XMonad/Config/Droundy.hs

@@ -39,8 +39,8 @@ import XMonad.Prompt.Shell ( shellPrompt )
 import XMonad.Actions.CopyWindow ( kill1, copy )
 import XMonad.Actions.DynamicWorkspaces ( withNthWorkspace, withWorkspace,
                                           selectWorkspace, renameWorkspace, removeWorkspace )
-import XMonad.Actions.CycleWS ( moveTo, WSType( HiddenNonEmptyWS ),
-                                Direction1D( Prev, Next) )
+import XMonad.Actions.CycleWS ( moveTo, hiddenWS, emptyWS,
+                                Direction1D( Prev, Next), WSType ((:&:), Not) )
 
 import XMonad.Hooks.ManageDocks ( avoidStruts, docks )
 import XMonad.Hooks.EwmhDesktops ( ewmh )
@@ -80,8 +80,8 @@ keys x = M.fromList $
     , ((modMask x .|. shiftMask, xK_Escape), io exitSuccess) -- %! Quit xmonad
     , ((modMask x              , xK_Escape), restart "xmonad" True) -- %! Restart xmonad
 
-    , ((modMask x .|. shiftMask, xK_Right), moveTo Next HiddenNonEmptyWS)
-    , ((modMask x .|. shiftMask, xK_Left), moveTo Prev HiddenNonEmptyWS)
+    , ((modMask x .|. shiftMask, xK_Right), moveTo Next $ hiddenWS :&: Not emptyWS)
+    , ((modMask x .|. shiftMask, xK_Left), moveTo Prev $ hiddenWS :&: Not emptyWS)
     , ((modMask x, xK_Right), sendMessage $ Go R)
     , ((modMask x, xK_Left), sendMessage $ Go L)
     , ((modMask x, xK_Up), sendMessage $ Go U)