From cd9a67706a9ed7162af94ca168c4530bc4b1c2cf Mon Sep 17 00:00:00 2001
From: Ivan Malison <IvanMalison@gmail.com>
Date: Sat, 22 Oct 2016 17:17:25 -0700
Subject: [PATCH] [XMonad] Add automatic workspace naming LayoutModifier

Note: This requires my own custom version of xmonad-contrib.
---
 dotfiles/xmonad/xmonad.hs | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/dotfiles/xmonad/xmonad.hs b/dotfiles/xmonad/xmonad.hs
index 402aca62..ed09ed17 100644
--- a/dotfiles/xmonad/xmonad.hs
+++ b/dotfiles/xmonad/xmonad.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE TypeSynonymInstances, MultiParamTypeClasses #-}
 import Control.Monad
 import Data.Aeson
 import qualified Data.ByteString.Lazy as B
@@ -20,6 +21,7 @@ import XMonad.Hooks.ManageDocks
 import XMonad.Hooks.FadeInactive
 import XMonad.Layout.BoringWindows
 import XMonad.Layout.LayoutCombinators
+import XMonad.Layout.LayoutModifier
 import XMonad.Layout.Minimize
 import XMonad.Layout.MultiColumns
 import XMonad.Layout.MultiToggle
@@ -28,6 +30,7 @@ import XMonad.Layout.NoBorders
 import XMonad.Layout.Spacing
 import qualified XMonad.StackSet as W
 import XMonad.Util.CustomKeys
+import qualified XMonad.Util.ExtensibleState as XS
 import XMonad.Util.NamedWindows (getName)
 
 getClass :: Window -> X String
@@ -65,13 +68,13 @@ main = xmonad $ ewmh $ pagerHints def
 
 myLogHook = fadeInactiveLogHook 0.9
 
-setWorkspaceNameToFocusedWindow workspace = do
-  namedWindows <- mapM getClass $ take 2 $ W.integrate' $ W.stack workspace
-  workspaceToName <- getWorkspaceNames
+setWorkspaceNameToFocusedWindow workspace  = do
+  namedWindows <- mapM getClass $ W.integrate' $ W.stack workspace
   renamedWindows <- remapNames namedWindows
-  let newName = intercalate "|" namedWindows
-  when (workspaceToName (W.tag workspace) /= newName) $
-       setWorkspaceName (W.tag workspace) (intercalate "|" renamedWindows)
+  WorkspaceNames namesMap <- XS.get
+  let newName = intercalate "|" renamedWindows
+      currentName = M.findWithDefault "" (W.tag workspace) namesMap
+  when (currentName /= newName) $ setWorkspaceName (W.tag workspace) newName
 
 remapNames namedWindows = do
   remap <- io getClassRemap
@@ -81,12 +84,20 @@ setWorkspaceNames = do
   ws <- gets windowset
   mapM_ setWorkspaceNameToFocusedWindow (W.workspaces ws)
 
+data WorkspaceNamesHook a = WorkspaceNamesHook deriving (Show, Read)
+
+instance LayoutModifier WorkspaceNamesHook Window where
+    hook _ = setWorkspaceNames
+
+workspaceNamesHook = ModifiedLayout WorkspaceNamesHook
+
 shiftThenView i = W.greedyView i . W.shift i
 
 layouts = multiCol [1, 1] 2 0.01 (-0.5) ||| Full ||| Tall 1 (3/100) (1/2)
 
-myLayoutHook = avoidStruts . smartSpacing 10 . noBorders . minimize
-               . boringWindows . mkToggle (MIRROR ?? EOT) $ layouts
+myLayoutHook = avoidStruts . smartSpacing 10 . noBorders . minimize .
+               boringWindows . mkToggle (MIRROR ?? EOT) . workspaceNamesHook
+                                 $ layouts
 
 myStartup = spawn "systemctl --user start wm.target"