Rename Internal to Rahm.Desktop

1 files changed, 86 insertions, 0 deletions

diff --git a/src/Rahm/Desktop/Windows.hs b/src/Rahm/Desktop/Windows.hs
new file mode 100644
index 0000000..d525aac
--- /dev/null
+++ b/src/Rahm/Desktop/Windows.hs
@@ -0,0 +1,86 @@
+module Rahm.Desktop.Windows where
+
+import XMonad (windowset, X, Window, get)
+
+import Control.Applicative ((<|>))
+import XMonad.StackSet (Stack(..), StackSet(..), Screen(..), Workspace(..), peek, integrate, integrate', allWindows)
+import Data.Maybe (listToMaybe, catMaybes)
+import qualified Data.Map as Map
+
+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 (mapStack fn) stack)
+
+-- | What genius decided to hide the instances for the Stack type!!???
+mapStack :: (a -> b) -> Stack a -> Stack b
+mapStack fn (Stack focus up down) = Stack (fn focus) (map fn up) (map fn down)
+
+getMaster :: StackSet i l a s sd -> Maybe a
+getMaster (StackSet (Screen (Workspace _ _ ss) _ _) _ _ _) =
+  head . integrate <$> ss
+
+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
+
+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
+
+workspaceMember :: (Eq a) => Workspace i l a -> a -> Bool
+workspaceMember (Workspace _ _ s) w = w `elem` integrate' s
+
+forAllWindows :: (Window -> X ()) -> X ()
+forAllWindows fn = do
+  stackSet <- windowset <$> get
+  mapM_ fn (allWindows stackSet)
+
+getFocusedWindow :: X (Maybe Window)
+getFocusedWindow = do
+  peek . windowset <$> get
+
+{- 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 workspaceMember ws win
+        then Just (OnScreen s)
+        else Nothing
+
+    findWindowWorkspace w =
+      if workspaceMember w win
+        then Just (OnHiddenWorkspace w)
+        else Nothing
+
+    findWindowFloat =
+      if win `elem` Map.keys float
+        then Just Floating
+        else Nothing