#+TITLE: XMonad Config
#+AUTHOR: Derek Taylor
#+PROPERTY: header-args :tangle xmonad.hs
#+auto_tangle: t
#+STARTUP: showeverything

* Table Of Contents :toc:
- [[#about-this-config][About This Config]]
- [[#imports][Imports]]
- [[#variables][Variables]]
- [[#autostart-the-startup-hook][Autostart (The Startup Hook)]]
- [[#gridselect][Gridselect]]
  - [[#gridselect-configuration][GridSelect Configuration]]
  - [[#gridselect-menus][Gridselect Menus]]
- [[#scratchpads][Scratchpads]]
- [[#layouts][Layouts]]
- [[#workspaces][Workspaces]]
- [[#managehook][Managehook]]
- [[#system-sounds][System Sounds]]
- [[#namedactions][NamedActions]]
- [[#keybindings][Keybindings]]
- [[#main][Main]]

* About This Config
#+CAPTION: XMonad Scrot
#+ATTR_HTML: :alt XMonad Scrot :title XMonad Scrot :align left
[[https://gitlab.com/dwt1/dotfiles/-/raw/master/.screenshots/dotfiles05-thumb.png]]

Xmonad is a dynamically tiling X11 window manager that is written and configured in Haskell.
- XMonad Official Website: [[https://xmonad.org][https://xmonad.org]]
- Haskell Official Website: [[https://haskell.org][https://haskell.org]]

This is the xmonad configuration of Derek Taylor (DistroTube)
- My YouTube: [[http://www.youtube.com/c/DistroTube][http://www.youtube.com/c/DistroTube]]
- My GitLab:  [[http://www.gitlab.com/dwt1/][http://www.gitlab.com/dwt1/]]

Keep in mind, that my configs are purposely bloated with examples of what you can do with xmonad. It is written more as a study guide rather than a config that you should download and use.

NOTE: You will also need my xmobar config, which is located here: https://gitlab.com/dwt1/dotfiles/-/tree/master/.config/xmobar

* Imports
These are Haskell modules that we must import so that we can use their functions later in the config.

#+BEGIN_SRC haskell
  -- Base
import XMonad
import System.Directory
import System.IO (hClose, hPutStr, hPutStrLn)
import System.Exit (exitSuccess)
import qualified XMonad.StackSet as W

    -- Actions
import XMonad.Actions.CopyWindow (kill1)
import XMonad.Actions.CycleWS (Direction1D(..), moveTo, shiftTo, WSType(..), nextScreen, prevScreen)
import XMonad.Actions.GridSelect
import XMonad.Actions.MouseResize
import XMonad.Actions.Promote
import XMonad.Actions.RotSlaves (rotSlavesDown, rotAllDown)
import XMonad.Actions.WindowGo (runOrRaise)
import XMonad.Actions.WithAll (sinkAll, killAll)
import qualified XMonad.Actions.Search as S

    -- Data
import Data.Char (isSpace, toUpper)
import Data.Maybe (fromJust)
import Data.Monoid
import Data.Maybe (isJust)
import Data.Tree
import qualified Data.Map as M

    -- Hooks
import XMonad.Hooks.DynamicLog (dynamicLogWithPP, wrap, xmobarPP, xmobarColor, shorten, PP(..))
import XMonad.Hooks.EwmhDesktops  -- for some fullscreen events, also for xcomposite in obs.
import XMonad.Hooks.ManageDocks (avoidStruts, docks, manageDocks, ToggleStruts(..))
import XMonad.Hooks.ManageHelpers (isFullscreen, doFullFloat, doCenterFloat)
import XMonad.Hooks.ServerMode
import XMonad.Hooks.SetWMName
import XMonad.Hooks.StatusBar
import XMonad.Hooks.StatusBar.PP
import XMonad.Hooks.WindowSwallowing
import XMonad.Hooks.WorkspaceHistory

    -- Layouts
import XMonad.Layout.Accordion
import XMonad.Layout.GridVariants (Grid(Grid))
import XMonad.Layout.SimplestFloat
import XMonad.Layout.Spiral
import XMonad.Layout.ResizableTile
import XMonad.Layout.Tabbed
import XMonad.Layout.ThreeColumns

    -- Layouts modifiers
import XMonad.Layout.LayoutModifier
import XMonad.Layout.LimitWindows (limitWindows, increaseLimit, decreaseLimit)
import XMonad.Layout.MultiToggle (mkToggle, single, EOT(EOT), (??))
import XMonad.Layout.MultiToggle.Instances (StdTransformers(NBFULL, MIRROR, NOBORDERS))
import XMonad.Layout.NoBorders
import XMonad.Layout.Renamed
import XMonad.Layout.ShowWName
import XMonad.Layout.Simplest
import XMonad.Layout.Spacing
import XMonad.Layout.SubLayouts
import XMonad.Layout.WindowArranger (windowArrange, WindowArrangerMsg(..))
import XMonad.Layout.WindowNavigation
import qualified XMonad.Layout.ToggleLayouts as T (toggleLayouts, ToggleLayout(Toggle))
import qualified XMonad.Layout.MultiToggle as MT (Toggle(..))

   -- Utilities
import XMonad.Util.Dmenu
import XMonad.Util.EZConfig (additionalKeysP, mkNamedKeymap)
import XMonad.Util.NamedActions
import XMonad.Util.NamedScratchpad
import XMonad.Util.Run (runProcessWithInput, safeSpawn, spawnPipe)
import XMonad.Util.SpawnOnce

   -- ColorScheme module (SET ONLY ONE!)
      -- Possible choice are:
      -- DoomOne
      -- Dracula
      -- GruvboxDark
      -- MonokaiPro
      -- Nord
      -- OceanicNext
      -- Palenight
      -- SolarizedDark
      -- SolarizedLight
      -- TomorrowNight
import Colors.DoomOne
#+END_SRC

* Variables
It's nice to assign values to stuff that you will use more than once in the config. Setting values for things like font, terminal and editor means you only have to change the value here to make changes globally.

#+BEGIN_SRC haskell
myFont :: String
myFont = "xft:SauceCodePro Nerd Font Mono:regular:size=9:antialias=true:hinting=true"

myModMask :: KeyMask
myModMask = mod4Mask        -- Sets modkey to super/windows key

myTerminal :: String
myTerminal = "alacritty"    -- Sets default terminal

myBrowser :: String
myBrowser = "qutebrowser "  -- Sets qutebrowser as browser

myEmacs :: String
myEmacs = "emacsclient -c -a 'emacs' "  -- Makes emacs keybindings easier to type

myEditor :: String
myEditor = "emacsclient -c -a 'emacs' "  -- Sets emacs as editor
-- myEditor = myTerminal ++ " -e vim "    -- Sets vim as editor

myBorderWidth :: Dimension
myBorderWidth = 2           -- Sets border width for windows

myNormColor :: String       -- Border color of normal windows
myNormColor   = colorBack   -- This variable is imported from Colors.THEME

myFocusColor :: String      -- Border color of focused windows
myFocusColor  = color15     -- This variable is imported from Colors.THEME

mySoundPlayer :: String
mySoundPlayer = "ffplay -nodisp -autoexit " -- The program that will play system sounds

windowCount :: X (Maybe String)
windowCount = gets $ Just . show . length . W.integrate' . W.stack . W.workspace . W.current . windowset

#+END_SRC

* Autostart (The Startup Hook)
These are commands we want XMonad to execute on startup, such as running a compositor, setting our wallpaper, starting the emacs daemon, and starting our system tray and the applications that belong in it.

#+BEGIN_SRC haskell
myStartupHook :: X ()
myStartupHook = do
  spawnOnce (mySoundPlayer ++ startupSound)
  spawn "killall conky"   -- kill current conky on each restart
  spawn "killall trayer"  -- kill current trayer on each restart
#+END_SRC

#+BEGIN_SRC haskell
  spawnOnce "lxsession"
  spawnOnce "picom"
  spawnOnce "nm-applet"
  spawnOnce "volumeicon"
  spawn "/usr/bin/emacs --daemon" -- emacs daemon for the emacsclient
#+END_SRC

We killed any running conky and trayer processes earlier in the autostart, so now we sleep for 2 seconds and then restart conky and trayer.
#+BEGIN_SRC haskell
  spawn ("sleep 2 && conky -c $HOME/.config/conky/xmonad/" ++ colorScheme ++ "-01.conkyrc")
  spawn ("sleep 2 && trayer --edge top --align right --widthtype request --padding 6 --SetDockType true --SetPartialStrut true --expand true --monitor 1 --transparent true --alpha 0 " ++ colorTrayer ++ " --height 22")
#+END_SRC

Select only =ONE= of the following four ways to set the wallpaper.

#+BEGIN_SRC haskell
  spawnOnce "xargs xwallpaper --stretch < ~/.cache/wall"
  -- spawnOnce "~/.fehbg &"  -- set last saved feh wallpaper
  -- spawnOnce "feh --randomize --bg-fill /usr/share/backgrounds/dtos-backgrounds/*"  -- feh set random wallpaper
  -- spawnOnce "nitrogen --restore &"   -- if you prefer nitrogen to feh
  setWMName "LG3D"
#+END_SRC

* Gridselect
GridSelect displays items (programs, open windows, etc.) in a 2D grid and lets the user select from it with the cursor/hjkl keys or the mouse.

** GridSelect Configuration
#+BEGIN_SRC haskell
myNavigation :: TwoD a (Maybe a)
myNavigation = makeXEventhandler $ shadowWithKeymap navKeyMap navDefaultHandler
 where navKeyMap = M.fromList [
          ((0,xK_Escape), cancel)
         ,((0,xK_Return), select)
         ,((0,xK_slash) , substringSearch myNavigation)
         ,((0,xK_Left)  , move (-1,0)  >> myNavigation)
         ,((0,xK_h)     , move (-1,0)  >> myNavigation)
         ,((0,xK_Right) , move (1,0)   >> myNavigation)
         ,((0,xK_l)     , move (1,0)   >> myNavigation)
         ,((0,xK_Down)  , move (0,1)   >> myNavigation)
         ,((0,xK_j)     , move (0,1)   >> myNavigation)
         ,((0,xK_Up)    , move (0,-1)  >> myNavigation)
         ,((0,xK_k)     , move (0,-1)  >> myNavigation)
         ,((0,xK_y)     , move (-1,-1) >> myNavigation)
         ,((0,xK_i)     , move (1,-1)  >> myNavigation)
         ,((0,xK_n)     , move (-1,1)  >> myNavigation)
         ,((0,xK_m)     , move (1,-1)  >> myNavigation)
         ,((0,xK_space) , setPos (0,0) >> myNavigation)
         ]
       navDefaultHandler = const myNavigation

myColorizer :: Window -> Bool -> X (String, String)
myColorizer = colorRangeFromClassName
                (0x28,0x2c,0x34) -- lowest inactive bg
                (0x28,0x2c,0x34) -- highest inactive bg
                (0xc7,0x92,0xea) -- active bg
                (0xc0,0xa7,0x9a) -- inactive fg
                (0x28,0x2c,0x34) -- active fg

-- gridSelect menu layout
mygridConfig :: p -> GSConfig Window
mygridConfig colorizer = (buildDefaultGSConfig myColorizer)
    { gs_cellheight   = 40
    , gs_cellwidth    = 200
    , gs_cellpadding  = 6
    , gs_navigate    = myNavigation
    , gs_originFractX = 0.5
    , gs_originFractY = 0.5
    , gs_font         = myFont
    }

spawnSelected' :: [(String, String)] -> X ()
spawnSelected' lst = gridselect conf lst >>= flip whenJust spawn
    where conf = def
                   { gs_cellheight   = 40
                   , gs_cellwidth    = 180
                   , gs_cellpadding  = 6
                   , gs_originFractX = 0.5
                   , gs_originFractY = 0.5
                   , gs_font         = myFont
                   }

runSelectedAction' :: GSConfig (X ()) -> [(String, X ())] -> X ()
runSelectedAction' conf actions = do
    selectedActionM <- gridselect conf actions
    case selectedActionM of
        Just selectedAction -> selectedAction
        Nothing -> return ()
#+end_src

** Gridselect Menus
#+begin_src haskell
-- gsCategories =
--   [ ("Games",      spawnSelected' gsGames)
--   --, ("Education",   spawnSelected' gsEducation)
--   , ("Internet",   spawnSelected' gsInternet)
--   , ("Multimedia", spawnSelected' gsMultimedia)
--   , ("Office",     spawnSelected' gsOffice)
--   , ("Settings",   spawnSelected' gsSettings)
--   , ("System",     spawnSelected' gsSystem)
--   , ("Utilities",  spawnSelected' gsUtilities)
--   ]

gsCategories =
  [ ("Games",      "xdotool key super+alt+1")
  , ("Education",  "xdotool key super+alt+2")
  , ("Internet",   "xdotool key super+alt+3")
  , ("Multimedia", "xdotool key super+alt+4")
  , ("Office",     "xdotool key super+alt+5")
  , ("Settings",   "xdotool key super+alt+6")
  , ("System",     "xdotool key super+alt+7")
  , ("Utilities",  "xdotool key super+alt+8")
  ]

gsGames =
  [ ("0 A.D.", "0ad")
  , ("Battle For Wesnoth", "wesnoth")
  , ("OpenArena", "openarena")
  , ("Sauerbraten", "sauerbraten")
  , ("Steam", "steam")
  , ("Unvanquished", "unvanquished")
  , ("Xonotic", "xonotic-glx")
  ]

gsEducation =
  [ ("GCompris", "gcompris-qt")
  , ("Kstars", "kstars")
  , ("Minuet", "minuet")
  , ("Scratch", "scratch")
  ]

gsInternet =
  [ ("Brave", "brave")
  , ("Discord", "discord")
  , ("Element", "element-desktop")
  , ("Firefox", "firefox")
  , ("LBRY App", "lbry")
  , ("Mailspring", "mailspring")
  , ("Nextcloud", "nextcloud")
  , ("Qutebrowser", "qutebrowser")
  , ("Transmission", "transmission-gtk")
  , ("Zoom", "zoom")
  ]

gsMultimedia =
  [ ("Audacity", "audacity")
  , ("Blender", "blender")
  , ("Deadbeef", "deadbeef")
  , ("Kdenlive", "kdenlive")
  , ("OBS Studio", "obs")
  , ("VLC", "vlc")
  ]

gsOffice =
  [ ("Document Viewer", "evince")
  , ("LibreOffice", "libreoffice")
  , ("LO Base", "lobase")
  , ("LO Calc", "localc")
  , ("LO Draw", "lodraw")
  , ("LO Impress", "loimpress")
  , ("LO Math", "lomath")
  , ("LO Writer", "lowriter")
  ]

gsSettings =
  [ ("ARandR", "arandr")
  , ("ArchLinux Tweak Tool", "archlinux-tweak-tool")
  , ("Customize Look and Feel", "lxappearance")
  , ("Firewall Configuration", "sudo gufw")
  ]

gsSystem =
  [ ("Alacritty", "alacritty")
  , ("Bash", (myTerminal ++ " -e bash"))
  , ("Htop", (myTerminal ++ " -e htop"))
  , ("Fish", (myTerminal ++ " -e fish"))
  , ("PCManFM", "pcmanfm")
  , ("VirtualBox", "virtualbox")
  , ("Virt-Manager", "virt-manager")
  , ("Zsh", (myTerminal ++ " -e zsh"))
  ]

gsUtilities =
  [ ("Emacs", "emacs")
  , ("Emacsclient", "emacsclient -c -a 'emacs'")
  , ("Nitrogen", "nitrogen")
  , ("Vim", (myTerminal ++ " -e vim"))
  ]

#+END_SRC

* Scratchpads
Allows to have several floating scratchpads running different applications.  Import Util.NamedScratchpad and bind a key to namedScratchpadSpawnAction.  In the example below, I have created named scratchpads for:
+ alacritty -- my terminal
+ mocp -- a terminal music player
+ qalculate-gtk -- a nice calculator

#+BEGIN_SRC haskell
myScratchPads :: [NamedScratchpad]
myScratchPads = [ NS "terminal" spawnTerm findTerm manageTerm
                , NS "mocp" spawnMocp findMocp manageMocp
                , NS "calculator" spawnCalc findCalc manageCalc
                ]
  where
    spawnTerm  = myTerminal ++ " -t scratchpad"
    findTerm   = title =? "scratchpad"
    manageTerm = customFloating $ W.RationalRect l t w h
               where
                 h = 0.9
                 w = 0.9
                 t = 0.95 -h
                 l = 0.95 -w
    spawnMocp  = myTerminal ++ " -t mocp -e mocp"
    findMocp   = title =? "mocp"
    manageMocp = customFloating $ W.RationalRect l t w h
               where
                 h = 0.9
                 w = 0.9
                 t = 0.95 -h
                 l = 0.95 -w
    spawnCalc  = "qalculate-gtk"
    findCalc   = className =? "Qalculate-gtk"
    manageCalc = customFloating $ W.RationalRect l t w h
               where
                 h = 0.5
                 w = 0.4
                 t = 0.75 -h
                 l = 0.70 -w
#+END_SRC

* Layouts
Defining the layouts that I want to have available.

#+BEGIN_SRC haskell
--Makes setting the spacingRaw simpler to write. The spacingRaw module adds a configurable amount of space around windows.
mySpacing :: Integer -> l a -> XMonad.Layout.LayoutModifier.ModifiedLayout Spacing l a
mySpacing i = spacingRaw False (Border i i i i) True (Border i i i i) True

-- Below is a variation of the above except no borders are applied
-- if fewer than two windows. So a single window has no gaps.
mySpacing' :: Integer -> l a -> XMonad.Layout.LayoutModifier.ModifiedLayout Spacing l a
mySpacing' i = spacingRaw True (Border i i i i) True (Border i i i i) True

-- Defining a bunch of layouts, many that I don't use.
-- limitWindows n sets maximum number of windows displayed for layout.
-- mySpacing n sets the gap size around the windows.
tall     = renamed [Replace "tall"]
           $ limitWindows 5
           $ smartBorders
           $ windowNavigation
           $ addTabs shrinkText myTabTheme
           $ subLayout [] (smartBorders Simplest)
           $ mySpacing 8
           $ ResizableTall 1 (3/100) (1/2) []
monocle  = renamed [Replace "monocle"]
           $ smartBorders
           $ windowNavigation
           $ addTabs shrinkText myTabTheme
           $ subLayout [] (smartBorders Simplest)
           $ Full
floats   = renamed [Replace "floats"]
           $ smartBorders
           $ simplestFloat
grid     = renamed [Replace "grid"]
           $ limitWindows 9
           $ smartBorders
           $ windowNavigation
           $ addTabs shrinkText myTabTheme
           $ subLayout [] (smartBorders Simplest)
           $ mySpacing 8
           $ mkToggle (single MIRROR)
           $ Grid (16/10)
spirals  = renamed [Replace "spirals"]
           $ limitWindows 9
           $ smartBorders
           $ windowNavigation
           $ addTabs shrinkText myTabTheme
           $ subLayout [] (smartBorders Simplest)
           $ mySpacing' 8
           $ spiral (6/7)
threeCol = renamed [Replace "threeCol"]
           $ limitWindows 7
           $ smartBorders
           $ windowNavigation
           $ addTabs shrinkText myTabTheme
           $ subLayout [] (smartBorders Simplest)
           $ ThreeCol 1 (3/100) (1/2)
threeRow = renamed [Replace "threeRow"]
           $ limitWindows 7
           $ smartBorders
           $ windowNavigation
           $ addTabs shrinkText myTabTheme
           $ subLayout [] (smartBorders Simplest)
           -- Mirror takes a layout and rotates it by 90 degrees.
           -- So we are applying Mirror to the ThreeCol layout.
           $ Mirror
           $ ThreeCol 1 (3/100) (1/2)
tabs     = renamed [Replace "tabs"]
           -- I cannot add spacing to this layout because it will
           -- add spacing between window and tabs which looks bad.
           $ tabbed shrinkText myTabTheme
tallAccordion  = renamed [Replace "tallAccordion"]
           $ Accordion
wideAccordion  = renamed [Replace "wideAccordion"]
           $ Mirror Accordion

-- setting colors for tabs layout and tabs sublayout.
myTabTheme = def { fontName            = myFont
                 , activeColor         = color15
                 , inactiveColor       = color08
                 , activeBorderColor   = color15
                 , inactiveBorderColor = colorBack
                 , activeTextColor     = colorBack
                 , inactiveTextColor   = color16
                 }

-- Theme for showWName which prints current workspace when you change workspaces.
myShowWNameTheme :: SWNConfig
myShowWNameTheme = def
  { swn_font              = "xft:Ubuntu:bold:size=60"
  , swn_fade              = 1.0
  , swn_bgcolor           = "#1c1f24"
  , swn_color             = "#ffffff"
  }

-- The layout hook
myLayoutHook = avoidStruts
               $ mouseResize
               $ windowArrange
               $ T.toggleLayouts floats
               $ mkToggle (NBFULL ?? NOBORDERS ?? EOT) myDefaultLayout
  where
    myDefaultLayout = withBorder myBorderWidth tall
                                           ||| noBorders monocle
                                           ||| floats
                                           ||| noBorders tabs
                                           ||| grid
                                           ||| spirals
                                           ||| threeCol
                                           ||| threeRow
                                           ||| tallAccordion
                                           ||| wideAccordion
#+END_SRC

* Workspaces
I have made my workspaces in xmobar "clickable." Clickable workspaces means the mouse can be used to switch workspaces. This requires /xdotool/ to be installed. You need to use UnsafeStdInReader instead of simply StdInReader in your xmobar config so you can pass actions to it.

#+begin_src haskell
-- myWorkspaces = [" 1 ", " 2 ", " 3 ", " 4 ", " 5 ", " 6 ", " 7 ", " 8 ", " 9 "]
myWorkspaces = [" dev ", " www ", " sys ", " doc ", " vbox ", " chat ", " mus ", " vid ", " gfx "]
myWorkspaceIndices = M.fromList $ zipWith (,) myWorkspaces [1..] -- (,) == \x y -> (x,y)

clickable ws = "<action=xdotool key super+"++show i++">"++ws++"</action>"
    where i = fromJust $ M.lookup ws myWorkspaceIndices
#+END_SRC

* Managehook
Sets some rules for certain programs. Examples include forcing certain programs to always float, or to always appear on a certain workspace.  Forcing programs to a certain workspace with a doShift requires xdotool if you are using clickable workspaces. You need the className or title of the program. Use xprop to get this info.

#+BEGIN_SRC haskell
myManageHook :: XMonad.Query (Data.Monoid.Endo WindowSet)
myManageHook = composeAll
  -- 'doFloat' forces a window to float.  Useful for dialog boxes and such.
  -- using 'doShift ( myWorkspaces !! 7)' sends program to workspace 8!
  -- I'm doing it this way because otherwise I would have to write out the full
  -- name of my workspaces and the names would be very long if using clickable workspaces.
  [ className =? "confirm"         --> doFloat
  , className =? "file_progress"   --> doFloat
  , className =? "dialog"          --> doFloat
  , className =? "download"        --> doFloat
  , className =? "error"           --> doFloat
  , className =? "Gimp"            --> doFloat
  , className =? "notification"    --> doFloat
  , className =? "pinentry-gtk-2"  --> doFloat
  , className =? "splash"          --> doFloat
  , className =? "toolbar"         --> doFloat
  , className =? "Yad"             --> doCenterFloat
  , title =? "Oracle VM VirtualBox Manager"  --> doFloat
  , title =? "Mozilla Firefox"     --> doShift ( myWorkspaces !! 1 )
  , className =? "Brave-browser"   --> doShift ( myWorkspaces !! 1 )
  , className =? "mpv"             --> doShift ( myWorkspaces !! 7 )
  , className =? "Gimp"            --> doShift ( myWorkspaces !! 8 )
  , className =? "VirtualBox Manager" --> doShift  ( myWorkspaces !! 4 )
  , (className =? "firefox" <&&> resource =? "Dialog") --> doFloat  -- Float Firefox Dialog
  , isFullscreen -->  doFullFloat
  ] <+> namedScratchpadManageHook myScratchPads
#+END_SRC

* System Sounds
Available sounds that are part of the default =dtos-sounds= package include:
+ menu-01.mp3
+ menu-02.mp3
+ menu-03.mp3
+ shutdown-01.mp3
+ shutdown-02.mp3
+ shutdown-03.mp3
+ startup-01.mp3
+ startup-02.mp3
+ startup-03.mp3

#+begin_src haskell
soundDir = "/opt/dtos-sounds/" -- The directory that has the sound files

startupSound  = soundDir ++ "startup-01.mp3"
shutdownSound = soundDir ++ "shutdown-01.mp3"
dmenuSound    = soundDir ++ "menu-01.mp3"
#+end_src

* NamedActions
=NamedActions= is a wrapper for keybinding configuration that can list the available keybindings.  The following custom functions are used to add =NamedActions= to our keybindings in the format that I desired.  =subTitle'= allows me to format the subtitle (=subKeys=) so that I can prepend and/or append text to them.  =showKeybindings= is a function that pipes the output of our =NamedActions= into a GUI display program, such as 'yad' or 'zenity'.

#+begin_src haskell
subtitle' ::  String -> ((KeyMask, KeySym), NamedAction)
subtitle' x = ((0,0), NamedAction $ map toUpper
                      $ sep ++ "\n-- " ++ x ++ " --\n" ++ sep)
  where
    sep = replicate (6 + length x) '-'

showKeybindings :: [((KeyMask, KeySym), NamedAction)] -> NamedAction
showKeybindings x = addName "Show Keybindings" $ io $ do
  h <- spawnPipe $ "yad --text-info --fontname=\"SauceCodePro Nerd Font Mono 12\" --fore=#46d9ff back=#282c36 --center --geometry=1200x800 --title \"XMonad keybindings\""
  --hPutStr h (unlines $ showKm x) -- showKM adds ">>" before subtitles
  hPutStr h (unlines $ showKmSimple x) -- showKmSimple doesn't add ">>" to subtitles
  hClose h
  return ()

#+end_src

* Keybindings
I am using the Xmonad.Util.EZConfig module which allows keybindings to be written in simpler, emacs-like format.  The Super/Windows key is 'M' (the modkey).  The ALT key is 'M1'.  SHIFT is 'S' and CTRL is 'C'.  Pay close attention to the way the keybindings list is formatted.  Each group of keybindings must have a =subKeys= heading, and each individual keybinding must use =addName= to add a description.  These headings and descriptions are needed for the keybindings list that can be launched with 'MOD-F1'.

| A FEW KEYBINDINGS       | ASSOCIATED ACTION                                            |
|-------------------------+--------------------------------------------------------------|
| MODKEY + RETURN         | opens terminal (alacritty)                                   |
| MODKEY + SHIFT + RETURN | opens run launcher (dmenu)                                   |
| MODKEY + TAB            | rotates through the available layouts                        |
| MODKEY + SPACE          | toggles fullscreen on/off (useful for watching videos)       |
| MODKEY + SHIFT + c      | closes window with focus                                     |
| MODKEY + SHIFT + r      | restarts xmonad                                              |
| MODKEY + SHIFT + q      | quits xmonad                                                 |
| MODKEY + 1-9            | switch focus to workspace (1-9)                              |
| MODKEY + SHIFT + 1-9    | send focused window to workspace (1-9)                       |
| MODKEY + j              | windows focus down (switches focus between windows in stack) |
| MODKEY + k              | windows focus up (switches focus between windows in stack)   |
| MODKEY + SHIFT + j      | windows swap down (swap windows in the stack)                |
| MODKEY + SHIFT + k      | windows swap up (swap the windows in the stack)              |
| MODKEY + period         | switches focus to next monitor                               |
| MODKEY + comma          | switches focus to prev monitor                               |
| MODKEY + r              | switches focus to monitor 3                                  |
| MODKEY + period         | switch focus to next monitor                                 |
| MODKEY + comma          | switch focus to prev monitor                                 |
| MODKEY + SPACE          | toggles fullscreen on/off (useful for watching videos)       |
| MODKEY + t              | force floating window back into tiling                       |
| MODKEY + F1             | show a list of all keybindings in our xmonad config          |

#+BEGIN_SRC haskell
myKeys :: XConfig l0 -> [((KeyMask, KeySym), NamedAction)]
myKeys c =
  --(subtitle "Custom Keys":) $ mkNamedKeymap c $
  let subKeys str ks = subtitle' str : mkNamedKeymap c ks in
  subKeys "Xmonad Essentials"
  [ ("M-C-r", addName "Recompile XMonad"       $ spawn "xmonad --recompile")
  , ("M-S-r", addName "Restart XMonad"         $ spawn "xmonad --restart")
  , ("M-S-q", addName "Quit XMonad"            $ sequence_ [spawn (mySoundPlayer ++ shutdownSound), io exitSuccess])
  , ("M-S-c", addName "Kill focused window"    $ kill1)
  , ("M-S-a", addName "Kill all windows on WS" $ killAll)
  , ("M-S-<Return>", addName "Run prompt"      $ sequence_ [spawn (mySoundPlayer ++ dmenuSound), spawn "~/.local/bin/dm-run"])
  , ("M-/", addName "DTOS Help"                $ spawn "~/.local/bin/dtos-help")]

  ^++^ subKeys "Switch to workspace"
  [ ("M-1", addName "Switch to workspace 1"    $ (windows $ W.greedyView $ myWorkspaces !! 0))
  , ("M-2", addName "Switch to workspace 2"    $ (windows $ W.greedyView $ myWorkspaces !! 1))
  , ("M-3", addName "Switch to workspace 3"    $ (windows $ W.greedyView $ myWorkspaces !! 2))
  , ("M-4", addName "Switch to workspace 4"    $ (windows $ W.greedyView $ myWorkspaces !! 3))
  , ("M-5", addName "Switch to workspace 5"    $ (windows $ W.greedyView $ myWorkspaces !! 4))
  , ("M-6", addName "Switch to workspace 6"    $ (windows $ W.greedyView $ myWorkspaces !! 5))
  , ("M-7", addName "Switch to workspace 7"    $ (windows $ W.greedyView $ myWorkspaces !! 6))
  , ("M-8", addName "Switch to workspace 8"    $ (windows $ W.greedyView $ myWorkspaces !! 7))
  , ("M-9", addName "Switch to workspace 9"    $ (windows $ W.greedyView $ myWorkspaces !! 8))]

  ^++^ subKeys "Send window to workspace"
  [ ("M-S-1", addName "Send to workspace 1"    $ (windows $ W.shift $ myWorkspaces !! 0))
  , ("M-S-2", addName "Send to workspace 2"    $ (windows $ W.shift $ myWorkspaces !! 1))
  , ("M-S-3", addName "Send to workspace 3"    $ (windows $ W.shift $ myWorkspaces !! 2))
  , ("M-S-4", addName "Send to workspace 4"    $ (windows $ W.shift $ myWorkspaces !! 3))
  , ("M-S-5", addName "Send to workspace 5"    $ (windows $ W.shift $ myWorkspaces !! 4))
  , ("M-S-6", addName "Send to workspace 6"    $ (windows $ W.shift $ myWorkspaces !! 5))
  , ("M-S-7", addName "Send to workspace 7"    $ (windows $ W.shift $ myWorkspaces !! 6))
  , ("M-S-8", addName "Send to workspace 8"    $ (windows $ W.shift $ myWorkspaces !! 7))
  , ("M-S-9", addName "Send to workspace 9"    $ (windows $ W.shift $ myWorkspaces !! 8))]

  ^++^ subKeys "Move window to WS and go there"
  [ ("M-S-<Page_Up>", addName "Move window to next WS"   $ shiftTo Next nonNSP >> moveTo Next nonNSP)
  , ("M-S-<Page_Down>", addName "Move window to prev WS" $ shiftTo Prev nonNSP >> moveTo Prev nonNSP)]

  ^++^ subKeys "Window navigation"
  [ ("M-j", addName "Move focus to next window"                $ windows W.focusDown)
  , ("M-k", addName "Move focus to prev window"                $ windows W.focusUp)
  , ("M-m", addName "Move focus to master window"              $ windows W.focusMaster)
  , ("M-S-j", addName "Swap focused window with next window"   $ windows W.swapDown)
  , ("M-S-k", addName "Swap focused window with prev window"   $ windows W.swapUp)
  , ("M-S-m", addName "Swap focused window with master window" $ windows W.swapMaster)
  , ("M-<Backspace>", addName "Move focused window to master"  $ promote)
  , ("M-S-,", addName "Rotate all windows except master"       $ rotSlavesDown)
  , ("M-S-.", addName "Rotate all windows current stack"       $ rotAllDown)]

  -- Dmenu scripts (dmscripts)
  -- In Xmonad and many tiling window managers, M-p is the default keybinding to
  -- launch dmenu_run, so I've decided to use M-p plus KEY for these dmenu scripts.
  ^++^ subKeys "Dmenu scripts"
  [ ("M-p h", addName "List all dmscripts"     $ spawn "dm-hub")
  , ("M-p a", addName "Choose ambient sound"   $ spawn "dm-sounds")
  , ("M-p b", addName "Set background"         $ spawn "dm-setbg")
  , ("M-p c", addName "Choose color scheme"    $ spawn "~/.local/bin/dtos-colorscheme")
  , ("M-p C", addName "Pick color from scheme" $ spawn "dm-colpick")
  , ("M-p e", addName "Edit config files"      $ spawn "dm-confedit")
  , ("M-p i", addName "Take a screenshot"      $ spawn "dm-maim")
  , ("M-p k", addName "Kill processes"         $ spawn "dm-kill")
  , ("M-p m", addName "View manpages"          $ spawn "dm-man")
  , ("M-p n", addName "Store and copy notes"   $ spawn "dm-note")
  , ("M-p o", addName "Browser bookmarks"      $ spawn "dm-bookman")
  , ("M-p p", addName "Passmenu"               $ spawn "passmenu -p \"Pass: \"")
  , ("M-p q", addName "Logout Menu"            $ spawn "dm-logout")
  , ("M-p r", addName "Listen to online radio" $ spawn "dm-radio")
  , ("M-p s", addName "Search various engines" $ spawn "dm-websearch")
  , ("M-p t", addName "Translate text"         $ spawn "dm-translate")]

  ^++^ subKeys "Favorite programs"
  [ ("M-<Return>", addName "Launch terminal"   $ spawn (myTerminal))
  , ("M-b", addName "Launch web browser"       $ spawn (myBrowser))
  , ("M-M1-h", addName "Launch htop"           $ spawn (myTerminal ++ " -e htop"))]

  ^++^ subKeys "Monitors"
  [ ("M-.", addName "Switch focus to next monitor" $ nextScreen)
  , ("M-,", addName "Switch focus to prev monitor" $ prevScreen)]

  -- Switch layouts
  ^++^ subKeys "Switch layouts"
  [ ("M-<Tab>", addName "Switch to next layout"   $ sendMessage NextLayout)
  , ("M-<Space>", addName "Toggle noborders/full" $ sendMessage (MT.Toggle NBFULL) >> sendMessage ToggleStruts)]

  -- Window resizing
  ^++^ subKeys "Window resizing"
  [ ("M-h", addName "Shrink window"               $ sendMessage Shrink)
  , ("M-l", addName "Expand window"               $ sendMessage Expand)
  , ("M-M1-j", addName "Shrink window vertically" $ sendMessage MirrorShrink)
  , ("M-M1-k", addName "Expand window vertically" $ sendMessage MirrorExpand)]

  -- Floating windows
  ^++^ subKeys "Floating windows"
  [ ("M-f", addName "Toggle float layout"        $ sendMessage (T.Toggle "floats"))
  , ("M-t", addName "Sink a floating window"     $ withFocused $ windows . W.sink)
  , ("M-S-t", addName "Sink all floated windows" $ sinkAll)]

  -- Increase/decrease spacing (gaps)
  ^++^ subKeys "Window spacing (gaps)"
  [ ("C-M1-j", addName "Decrease window spacing" $ decWindowSpacing 4)
  , ("C-M1-k", addName "Increase window spacing" $ incWindowSpacing 4)
  , ("C-M1-h", addName "Decrease screen spacing" $ decScreenSpacing 4)
  , ("C-M1-l", addName "Increase screen spacing" $ incScreenSpacing 4)]

  -- Increase/decrease windows in the master pane or the stack
  ^++^ subKeys "Increase/decrease windows in master pane or the stack"
  [ ("M-S-<Up>", addName "Increase clients in master pane"   $ sendMessage (IncMasterN 1))
  , ("M-S-<Down>", addName "Decrease clients in master pane" $ sendMessage (IncMasterN (-1)))
  , ("M-=", addName "Increase max # of windows for layout"   $ increaseLimit)
  , ("M--", addName "Decrease max # of windows for layout"   $ decreaseLimit)]

  -- Sublayouts
  -- This is used to push windows to tabbed sublayouts, or pull them out of it.
  ^++^ subKeys "Sublayouts"
  [ ("M-C-h", addName "pullGroup L"           $ sendMessage $ pullGroup L)
  , ("M-C-l", addName "pullGroup R"           $ sendMessage $ pullGroup R)
  , ("M-C-k", addName "pullGroup U"           $ sendMessage $ pullGroup U)
  , ("M-C-j", addName "pullGroup D"           $ sendMessage $ pullGroup D)
  , ("M-C-m", addName "MergeAll"              $ withFocused (sendMessage . MergeAll))
  -- , ("M-C-u", addName "UnMerge"               $ withFocused (sendMessage . UnMerge))
  , ("M-C-/", addName "UnMergeAll"            $  withFocused (sendMessage . UnMergeAll))
  , ("M-C-.", addName "Switch focus next tab" $  onGroup W.focusUp')
  , ("M-C-,", addName "Switch focus prev tab" $  onGroup W.focusDown')]

  -- Scratchpads
  -- Toggle show/hide these programs. They run on a hidden workspace.
  -- When you toggle them to show, it brings them to current workspace.
  -- Toggle them to hide and it sends them back to hidden workspace (NSP).
  ^++^ subKeys "Scratchpads"
  [ ("M-s t", addName "Toggle scratchpad terminal"   $ namedScratchpadAction myScratchPads "terminal")
  , ("M-s m", addName "Toggle scratchpad mocp"       $ namedScratchpadAction myScratchPads "mocp")
  , ("M-s c", addName "Toggle scratchpad calculator" $ namedScratchpadAction myScratchPads "calculator")]

  -- Controls for mocp music player (SUPER-u followed by a key)
  ^++^ subKeys "Mocp music player"
  [ ("M-u p", addName "mocp play"                $ spawn "mocp --play")
  , ("M-u l", addName "mocp next"                $ spawn "mocp --next")
  , ("M-u h", addName "mocp prev"                $ spawn "mocp --previous")
  , ("M-u <Space>", addName "mocp toggle pause"  $ spawn "mocp --toggle-pause")]

  ^++^ subKeys "GridSelect"
  -- , ("C-g g", addName "Select favorite apps"     $ runSelectedAction' defaultGSConfig gsCategories)
  [ ("M-M1-<Return>", addName "Select favorite apps" $ spawnSelected'
       $ gsGames ++ gsEducation ++ gsInternet ++ gsMultimedia ++ gsOffice ++ gsSettings ++ gsSystem ++ gsUtilities)
  , ("M-M1-c", addName "Select favorite apps"    $ spawnSelected' gsCategories)
  , ("M-M1-t", addName "Goto selected window"    $ goToSelected $ mygridConfig myColorizer)
  , ("M-M1-b", addName "Bring selected window"   $ bringSelected $ mygridConfig myColorizer)
  , ("M-M1-1", addName "Menu of games"           $ spawnSelected' gsGames)
  , ("M-M1-2", addName "Menu of education apps"  $ spawnSelected' gsEducation)
  , ("M-M1-3", addName "Menu of Internet apps"   $ spawnSelected' gsInternet)
  , ("M-M1-4", addName "Menu of multimedia apps" $ spawnSelected' gsMultimedia)
  , ("M-M1-5", addName "Menu of office apps"     $ spawnSelected' gsOffice)
  , ("M-M1-6", addName "Menu of settings apps"   $ spawnSelected' gsSettings)
  , ("M-M1-7", addName "Menu of system apps"     $ spawnSelected' gsSystem)
  , ("M-M1-8", addName "Menu of utilities apps"  $ spawnSelected' gsUtilities)]

  -- Emacs (SUPER-e followed by a key)
  ^++^ subKeys "Emacs"
  [ ("M-e e", addName "Emacsclient Dashboard"    $ spawn (myEmacs ++ ("--eval '(dashboard-refresh-buffer)'")))
  , ("M-e a", addName "Emacsclient EMMS (music)" $ spawn (myEmacs ++ ("--eval '(emms)' --eval '(emms-play-directory-tree \"~/Music/\")'")))
  , ("M-e b", addName "Emacsclient Ibuffer"      $ spawn (myEmacs ++ ("--eval '(ibuffer)'")))
  , ("M-e d", addName "Emacsclient Dired"        $ spawn (myEmacs ++ ("--eval '(dired nil)'")))
  , ("M-e i", addName "Emacsclient ERC (IRC)"    $ spawn (myEmacs ++ ("--eval '(erc)'")))
  , ("M-e n", addName "Emacsclient Elfeed (RSS)" $ spawn (myEmacs ++ ("--eval '(elfeed)'")))
  , ("M-e s", addName "Emacsclient Eshell"       $ spawn (myEmacs ++ ("--eval '(eshell)'")))
  , ("M-e v", addName "Emacsclient Vterm"        $ spawn (myEmacs ++ ("--eval '(+vterm/here nil)'")))
  , ("M-e w", addName "Emacsclient EWW Browser"  $ spawn (myEmacs ++ ("--eval '(doom/window-maximize-buffer(eww \"distro.tube\"))'")))]

  -- Multimedia Keys
  ^++^ subKeys "Multimedia keys"
  [ ("<XF86AudioPlay>", addName "mocp play"           $ spawn "mocp --play")
  , ("<XF86AudioPrev>", addName "mocp next"           $ spawn "mocp --previous")
  , ("<XF86AudioNext>", addName "mocp prev"           $ spawn "mocp --next")
  , ("<XF86AudioMute>", addName "Toggle audio mute"   $ spawn "amixer set Master toggle")
  , ("<XF86AudioLowerVolume>", addName "Lower vol"    $ spawn "amixer set Master 5%- unmute")
  , ("<XF86AudioRaiseVolume>", addName "Raise vol"    $ spawn "amixer set Master 5%+ unmute")
  , ("<XF86HomePage>", addName "Open home page"       $ spawn (myBrowser ++ " https://www.youtube.com/c/DistroTube"))
  , ("<XF86Search>", addName "Web search (dmscripts)" $ spawn "dm-websearch")
  , ("<XF86Mail>", addName "Email client"             $ runOrRaise "thunderbird" (resource =? "thunderbird"))
  , ("<XF86Calculator>", addName "Calculator"         $ runOrRaise "qalculate-gtk" (resource =? "qalculate-gtk"))
  , ("<XF86Eject>", addName "Eject /dev/cdrom"        $ spawn "eject /dev/cdrom")
  , ("<Print>", addName "Take screenshot (dmscripts)" $ spawn "dm-maim")
  ]
  -- The following lines are needed for named scratchpads.
    where nonNSP          = WSIs (return (\ws -> W.tag ws /= "NSP"))
          nonEmptyNonNSP  = WSIs (return (\ws -> isJust (W.stack ws) && W.tag ws /= "NSP"))

#+END_SRC

* Main
This is the "main" of XMonad. This where everything in our configs comes together and works.

#+BEGIN_SRC haskell
main :: IO ()
main = do
  -- Launching three instances of xmobar on their monitors.
  xmproc0 <- spawnPipe ("xmobar -x 0 $HOME/.config/xmobar/" ++ colorScheme ++ "-xmobarrc")
  xmproc1 <- spawnPipe ("xmobar -x 1 $HOME/.config/xmobar/" ++ colorScheme ++ "-xmobarrc")
  xmproc2 <- spawnPipe ("xmobar -x 2 $HOME/.config/xmobar/" ++ colorScheme ++ "-xmobarrc")
  -- the xmonad, ya know...what the WM is named after!
  xmonad $ addDescrKeys' ((mod4Mask, xK_F1), showKeybindings) myKeys $ ewmh $ docks $ def
    { manageHook         = myManageHook <+> manageDocks
    , handleEventHook    = swallowEventHook (className =? "Alacritty"  <||> className =? "st-256color" <||> className =? "XTerm") (return True)
    , modMask            = myModMask
    , terminal           = myTerminal
    , startupHook        = myStartupHook
    , layoutHook         = showWName' myShowWNameTheme $ myLayoutHook
    , workspaces         = myWorkspaces
    , borderWidth        = myBorderWidth
    , normalBorderColor  = myNormColor
    , focusedBorderColor = myFocusColor
    , logHook = dynamicLogWithPP $  filterOutWsPP [scratchpadWorkspaceTag] $ xmobarPP
        { ppOutput = \x -> hPutStrLn xmproc0 x   -- xmobar on monitor 1
                        >> hPutStrLn xmproc1 x   -- xmobar on monitor 2
                        >> hPutStrLn xmproc2 x   -- xmobar on monitor 3
        , ppCurrent = xmobarColor color06 "" . wrap
                      ("<box type=Bottom width=2 mb=2 color=" ++ color06 ++ ">") "</box>"
          -- Visible but not current workspace
        , ppVisible = xmobarColor color06 "" . clickable
          -- Hidden workspace
        , ppHidden = xmobarColor color05 "" . wrap
                     ("<box type=Top width=2 mt=2 color=" ++ color05 ++ ">") "</box>" . clickable
          -- Hidden workspaces (no windows)
        , ppHiddenNoWindows = xmobarColor color05 ""  . clickable
          -- Title of active window
        , ppTitle = xmobarColor color16 "" . shorten 60
          -- Separator character
        , ppSep =  "<fc=" ++ color09 ++ "> <fn=1>|</fn> </fc>"
          -- Urgent workspace
        , ppUrgent = xmobarColor color02 "" . wrap "!" "!"
          -- Adding # of windows on current workspace to the bar
        , ppExtras  = [windowCount]
          -- order of things in xmobar
        , ppOrder  = \(ws:l:t:ex) -> [ws,l]++ex++[t]
        }
    }
#+END_SRC