dotfiles/home-manager/modules/xmonad/app/Main.hs

-- SPDX-FileCopyrightText: 2022 Richard Brežák <richard@brezak.sk>
--
-- SPDX-License-Identifier: LGPL-3.0-or-later

--
-- xmonad example config file.
--
-- A template showing all available configuration hooks,
-- and how to override the defaults in your own xmonad.hs conf file.
--
-- Normally, you'd only override those defaults you care about.
--

{-# LANGUAGE BlockArguments
#-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE TupleSections #-}

import XMonad
import Data.Monoid
import Data.List (delete)
import Data.Maybe
import Data.Function
import Data.Functor
import System.Exit
import System.Environment
import XMonad.Util.EZConfig
import XMonad.Util.SpawnOnce
import XMonad.Util.WindowProperties
import XMonad.Hooks.ManageDocks
import XMonad.Hooks.EwmhDesktops

import XMonad.Layout.BinarySpacePartition
import XMonad.Layout.Tabbed
import XMonad.Layout.NoBorders
import XMonad.Layout.IndependentScreens
import XMonad.Util.WorkspaceCompare
import XMonad.Hooks.DynamicLog
import XMonad.Hooks.StatusBar
import XMonad.Actions.UpdatePointer
import XMonad.Actions.FloatKeys
import XMonad.Actions.Warp
import XMonad.Actions.CopyWindow
import XMonad.StackSet (Workspace, integrate', stack)
import Foreign.C.String (peekCString)

import Control.Monad

import qualified XMonad.StackSet as W
import qualified Data.Map        as M
import XMonad.Actions.Navigation2D
import XMonad.Layout.Cross (simpleCross)
import Data.IORef
import GHC.IO.Unsafe (unsafePerformIO)


myTerminal = "xterm"
myFocusFollowsMouse = True
myClickJustFocuses = False
-- > workspaces = ["web", "irc", "code" ] ++ map show [4..9]
myWorkspaces    = withScreens 2 $ map show ([1..9] ++ [0])

toggleFloat :: Window -> X ()
toggleFloat window = do
  { floats <- gets (W.floating . windowset);
    if window `M.member` floats
    then withFocused $ windows . W.sink
    else float window }

toggleFullscreen :: Display -> Window -> X ()
toggleFullscreen dpy window = do
  wmstate <- getAtom "_NET_WM_STATE"
  fullsc <- getAtom "_NET_WM_STATE_FULLSCREEN"
  wstate <- fromMaybe [] `fmap` getProp32 wmstate window

  let
    ptype = 4
    chWstate f = io $ changeProperty32 dpy window wmstate ptype propModeReplace (f wstate)
    isFull = fromIntegral fullsc `elem` wstate

  unless isFull $ do
    chWstate (fromIntegral fullsc:)
    windows $ W.float window $ W.RationalRect 0 0 1 1
  when isFull $ do
    chWstate $ delete (fromIntegral fullsc)
    windows $ W.sink window

centerMouse :: X ()
centerMouse = warpToWindow 0.5 0.5

getCurrentLayout :: X String
getCurrentLayout =
  gets windowset <&> description . W.layout . W.workspace . W.current

workspacesGrouped :: X [(WorkspaceId, Window, String)]
workspacesGrouped = withDisplay \dpy -> do
  ws <- gets windowset
  let x = map W.workspace (W.current ws : W.visible ws)
  let y = W.hidden ws
  mapM (\v -> do
           let windows = getWorkspaceWindows v
           mapM (\win -> getWindowTitle win dpy <&> \title -> (W.tag v, win, title)) windows) (x ++ y) <&> concat

getWorkspaceWindows :: Workspace i l Window -> [Window]
getWorkspaceWindows w = integrate' $ stack w

getWindowTitle :: Window -> Display -> X String
getWindowTitle w d = liftIO $ getTextProperty d w wM_NAME >>= (peekCString . tp_value)

modm :: KeyMask
modm = mod4Mask

skipFloating :: Ord a => W.StackSet i l a s sd -> (W.StackSet i l a s sd -> W.StackSet i l a s sd) -> W.StackSet i l a s sd
skipFloating stacks f
    | isNothing curr = stacks -- short circuit if there is no currently focused window
    | otherwise = skipFloatingR stacks curr f
  where curr = W.peek stacks

skipFloatingR :: Ord a => W.StackSet i l a s sd -> (Maybe a) -> (W.StackSet i l a s sd -> W.StackSet i l a s sd) -> W.StackSet i l a s sd
skipFloatingR stacks startWindow f
    | isNothing nextWindow = stacks -- next window is nothing return current stack set
    | nextWindow == startWindow = newStacks -- if next window is the starting window then return the new stack set
    | M.notMember (fromJust nextWindow) (W.floating stacks) = newStacks -- if next window is not a floating window return the new stack set
    | otherwise = skipFloatingR newStacks startWindow f -- the next window is a floating window so keep recursing (looking)
  where newStacks = f stacks
        nextWindow = W.peek newStacks

------------------------------------------------------------------------
-- Key bindings. Add, modify or remove key bindings here.
--
myKeymap c =
    [
    -- launch dmenu
      ("M-e", spawn "dmenu_run")

    -- close focused window
    , ("M-S-q", io exitSuccess)

     -- Rotate through the available layout algorithms
    , ("M-<Space>", sendMessage NextLayout)

    --  Reset the layouts on the current workspace to default
    -- , ("M-S-Space", setLayout $ XMonad.layoutHook c)

    -- Resize viewed windows to the correct size
    , ("M-b", refresh)

    -- Push window back into tiling
    , ("M-y", withFocused toggleFloat)

    -- warp to middle of window
    , ("M-d", centerMouse)

    -- , ("M-b", spawn ("pkill xmobar && " ++ xmobarCmd))
    , ("<Print>", spawn "sleep 0.1 ; screenshot select")
    , ("S-<Print>", spawn "screenshot screen && sleep 0.1 && notify -t 5000 \"snap\"")
    , ("C-S-<Print>", spawn "screenshot focused && sleep 0.1 && notify -t 5000 \"snap\"")

    -- Kill focused window
    , ("M-S-k", kill1)
    -- Kill all instances of focused window
    , ("M-S-C-k", kill)

    -- Restart xmonad
    , ("M-k", spawn "reload")

    -- float keys
     , ("M-g", sendMessage $ ExpandTowards L)
     , ("M-c", sendMessage $ ExpandTowards U)
     , ("M-l", sendMessage $ ExpandTowards D)
     , ("M-ß", sendMessage $ ExpandTowards R)
     , ("M-S-g", sendMessage $ ShrinkFrom L)
     , ("M-S-c", sendMessage $ ShrinkFrom U)
     , ("M-S-l", sendMessage $ ShrinkFrom D)
     , ("M-S-ẞ", sendMessage $ ShrinkFrom R)

     , ("M-t", windowGo L False >> centerMouse)
     , ("M-r", getCurrentLayout >>= \case
           "Tabbed Simplest" -> windows (`skipFloating` W.focusUp)
           _ -> windowGo U False >> centerMouse)
     , ("M-n", getCurrentLayout >>= \case
           "Tabbed Simplest" -> windows (`skipFloating` W.focusDown)
           _ -> windowGo D False >> centerMouse)
     , ("M-s", windowGo R False >> centerMouse)

     , ("M-S-t", windowSwap L False >> centerMouse)
     , ("M-S-r", windowSwap U False >> centerMouse)
     , ("M-S-n", windowSwap D False >> centerMouse)
     , ("M-S-s", windowSwap R False >> centerMouse)

     , ("M-C-g", sendMessage Rotate)
     , ("M-C-c", sendMessage Swap)
     , ("M-C-l", sendMessage FocusParent)
     , ("M-C-ß", sendMessage SelectNode)

     , ("M-C-t", sendMessage Balance >> centerMouse >> (liftIO . print . description $ smartBorders simpleTabbed))
     , ("M-C-r", sendMessage Equalize >> centerMouse >> (liftIO . print . description $ smartBorders simpleTabbed))
     , ("M-C-n", sendMessage $ SplitShift Prev)
     , ("M-C-s", sendMessage $ SplitShift Next)

     , ("M-z", spawn "loginctl lock-session")

     , ("<XF86AudioMute>"         , spawn "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle")
     , ("<XF86AudioRaiseVolume>"  , spawn "wpctl set-volume -l 1.5 @DEFAULT_AUDIO_SINK@ 5%+")
     , ("<XF86AudioLowerVolume>"  , spawn "wpctl set-volume @DEFAULT_AUDIO_SINK@ 5%-")
     , ("<XF86MonBrightnessUp>"   , spawn "brightnessctl set +5%")
     , ("<XF86MonBrightnessDown>" , spawn "brightnessctl set 5%-")

     , ("<XF86AudioPlay>"         , spawn "notify-send -t 5000 \"Music: Play\"" >> spawn "playerctl play-pause")
     , ("<XF86AudioStop>"         , spawn "notify-send -t 5000 \"Music: Stop\"" >> spawn "playerctl stop")
     , ("<XF86AudioPrev>"         , spawn "notify-send -t 5000 \"Music: Prev\"" >> spawn "playerctl previous")
     , ("<XF86AudioNext>"         , spawn "notify-send -t 5000 \"Music: Next\"" >> spawn "playerctl next")

     , ("<XF86TouchpadToggle>"    , spawn "toggle-touchpad")

     , ("M-<F1>", spawn "auxmenu")
     , ("M-<F2>", spawn "emacsclient -cn")
     , ("M-<F3>", spawn "emacs-passmenu copy")
     , ("M-S-<F3>", spawn "emacs-passmenu qr")
     , ("M-S-<Return>", spawn "emacs-vterm")
     , ("M-<Return>", spawn "alacritty")

     , ("M-<F11>", withDisplay $ \dpy -> withFocused $ \window -> toggleFullscreen dpy window)
     , ("M-<F9>", (workspacesGrouped >>= \ws -> (liftIO . print $ ws)))
    ]
    ++
    --
    --
    --
    --
    -- mod-[1..9], Switch to workspace N
    -- mod-[1..9], Switch to workspace N
    -- mod-[1..9], Switch to workspace N
    -- mod-[1..9], Switch to workspace N
    --
    --
    --
    --

    --

    --
    -- mod-[1..9], Switch to workspace N
    -- mod-[1..9], Switch to workspace N
    --
    --
    
    --
    --
    -- mod-[1..9], Switch to workspace N
    -- mod-[1..9], Switch to workspace N
    --
    --

    --
    -- mod-[1..9], Switch to workspace N
    --
    [("M-" ++ m ++ [k], windows $ onCurrentScreen f i)
        | (i, k) <- zip (workspaces' c) "1234567890"
        , (f, m) <- [(W.greedyView, ""), (W.shift, "S-"), (copy, "S-C-")]]
    ++
    --
    --
    --
    --
    -- mod-{w,e,r}, Switch to physical/Xinerama screens 1, 2, or 3
    -- mod-{w,e,r}, Switch to physical/Xinerama screens 1, 2, or 3
    -- mod-{w,e,r}, Switch to physical/Xinerama screens 1, 2, or 3
    -- mod-{w,e,r}, Switch to physical/Xinerama screens 1, 2, or 3
    -- mod-shift-{w,e,r}, Move client to screen 1, 2, or 3
    -- mod-shift-{w,e,r}, Move client to screen 1, 2, or 3
    -- mod-shift-{w,e,r}, Move client to screen 1, 2, or 3
    -- mod-shift-{w,e,r}, Move client to screen 1, 2, or 3
    --
    --
    --
    --
    [("M-"++m++[key], screenWorkspace sc >>= flip whenJust (windows . f))
        | (key, sc) <- zip ".o," [0..]
        , (f, m) <- [(W.view, ""), (W.shift, "S-")]]
    where
      xMoveWindow
        :: (Position, Position)
        -> Window
        -> X ()
      xMoveWindow (x, y) w = withDisplay (\d -> do
        (_, ox, oy, _, _, _, _) <- io $ getGeometry d w
        io $ moveWindow d w (ox + x) (oy + y))


------------------------------------------------------------------------
-- Mouse bindings: default actions bound to mouse events
--
myMouseBindings (XConfig {XMonad.modMask = modm}) = M.fromList $

    -- mod-button1, Set the window to floating mode and move by dragging
    [ ((modm, button2), (\w -> focus w >> windows W.shiftMaster))

    -- mod-button3, Set the window to floating mode and resize by dragging
    , ((modm, button3), (\w -> focus w >> mouseResizeWindow w
                                       >> windows W.shiftMaster))

    -- you may also bind events to the mouse scroll wheel (button4 and button5)
    ]

------------------------------------------------------------------------
-- Layouts:

-- You can specify and transform your layouts by modifying these values.
-- If you change layout bindings be sure to use 'mod-shift-space' after
-- restarting (with 'mod-q') to reset your layout state to the new
-- defaults, as xmonad preserves your old layout settings by default.
--
-- The available layouts.  Note that each layout is separated by |||,
-- which denotes layout choice.
--
myLayout = smartBorders simpleTabbed ||| smartBorders emptyBSP
  where
     -- default tiling algorithm partitions the screen into two panes
     tiled   = Tall nmaster delta ratio

     -- The default number of windows in the master pane
     nmaster = 1

     -- Default proportion of screen occupied by master pane
     ratio   = 1/2

     -- Percent of screen to increment by when resizing panes
     delta   = 3/100

myPP = def
   { ppLayout = const ""  -- Don't show the layout name
   , ppSort = getSortByXineramaRule  -- Sort left/right screens on the left, non-empty workspaces after those
   , ppTitle = const ""  -- Don't show the focused window's title
   , ppTitleSanitize = const ""  -- Also about window's title
   , ppVisible = wrap "(" ")"  -- Non-focused (but still visible) screen
   }

spawnBar :: ScreenId -> IO StatusBarConfig
spawnBar screen = pure $ statusBarPropTo ("_XMONAD_LOG_" <> screenString ) ("polybar-mm " <> screenString) (pure myPP)
  where screenString = show (fromIntegral screen :: Int)

------------------------------------------------------------------------
-- Now run xmonad with all the defaults we set up.

-- Run xmonad with the settings you specify. No need to modify this.
--
-- main = xmonad $ ewmh $ docks $ defaults
main = do
  getEnv "PATH" >>= \path -> setEnv "PATH" (path <> ":/home/main/.xmonad/runenv/bin")
  print (description (smartBorders simpleTabbed))

  let
    nav2dConfig
      = def
      -- doesn't work with tabbed at all
      -- { unmappedWindowRect = [("Tabbed Simplest", fullScreenRect)]}

  defaults & xmonad . docks . dynamicSBs spawnBar . withNavigation2DConfig nav2dConfig

getNetWMState :: Window -> X [Atom]
getNetWMState w = do
  atom <- getAtom "_NET_WM_STATE"
  map fromIntegral . fromMaybe [] <$> getProp32 atom w


hasNetWMState :: String -> Query Bool
hasNetWMState state = do
  window  <- ask
  wmstate <- liftX $ getNetWMState window
  atom    <- liftX $ getAtom state
  return $ elem atom wmstate

ewwWindows :: IORef [Window]
{-# NOINLINE ewwWindows #-}
ewwWindows = unsafePerformIO $ newIORef []

-- A structure containing your configuration settings, overriding
-- fields in the default config. Any you don't override, will
-- use the defaults defined in xmonad/XMonad/Config.hs
--
-- No need to modify this.
--
defaults = let
  c = def {
      -- simple stuff
      terminal           = myTerminal,
      focusFollowsMouse  = myFocusFollowsMouse,
      clickJustFocuses   = myClickJustFocuses,
      modMask            = modm,
      workspaces         = myWorkspaces,

      -- key bindings
      -- keys               = myKeys,
      mouseBindings      = myMouseBindings,

      -- hooks, layouts
      layoutHook         = avoidStruts $ myLayout,

      -- To find the property name associated with a program, use
      -- > xprop | grep WM_CLASS
      -- and click on the client you're interested in.
      --
      -- To match on the WM_NAME, you can use 'title' in the same way that
      -- 'className' and 'resource' are used below.
      manageHook         = manageDocks <+> composeAll
        [ title =? "emacs-completing-read-float"  --> doFloat
        , hasNetWMState "_NET_WM_STATE_ABOVE"     --> doFloat
        , hasNetWMState "_NET_WM_STATE_STICKY"    --> doF copyToAll
        , className =? "Eww"                      --> (do
                                                          liftIO $ print "eww"
                                                          window <- ask
                                                          oldSet <- liftIO $ readIORef ewwWindows
                                                          liftIO $ writeIORef ewwWindows (window : oldSet)
                                                          doF id)
        , className =? "xmessage"                 --> doFloat
        -- , resource  =? "desktop_window" --> doIgnore
        -- , resource  =? "kdesktop"       --> doIgnore
        ],

      logHook            = do
          updatePointer (0.5, 0.5) (1, 1)
          set <- liftIO $ readIORef ewwWindows
          liftIO $ print set
          pure (),

      -- XMonad.Layout.PerWorkspace
      -- startupHook        = void,

      -- Looks
      focusedBorderColor = "#5c5c5c",
      normalBorderColor = "#222222",
      borderWidth = 4
    }
  in additionalKeysP c (myKeymap c)
   & flip additionalKeys [ ((mod1Mask, xK_v), return ()) ]
   & ewmh

-- | Finally, a copy of the default bindings in simple textual tabular format.
help :: String
help = unlines ["The default modifier key is 'alt'. Default keybindings:",
    "",
    "-- launching and killing programs",
    "mod-Shift-Enter  Launch xterminal",
    "mod-p            Launch dmenu",
    "mod-Shift-p      Launch gmrun",
    "mod-Shift-c      Close/kill the focused window",
    "mod-Space        Rotate through the available layout algorithms",
    "mod-Shift-Space  Reset the layouts on the current workSpace to default",
    "mod-n            Resize/refresh viewed windows to the correct size",
    "",
    "-- move focus up or down the window stack",
    "mod-Tab        Move focus to the next window",
    "mod-Shift-Tab  Move focus to the previous window",
    "mod-j          Move focus to the next window",
    "mod-k          Move focus to the previous window",
    "mod-m          Move focus to the master window",
    "",
    "-- modifying the window order",
    "mod-Return   Swap the focused window and the master window",
    "mod-Shift-j  Swap the focused window with the next window",
    "mod-Shift-k  Swap the focused window with the previous window",
    "",
    "-- resizing the master/slave ratio",
    "mod-h  Shrink the master area",
    "mod-l  Expand the master area",
    "",
    "-- floating layer support",
    "mod-t  Push window back into tiling; unfloat and re-tile it",
    "",
    "-- increase or decrease number of windows in the master area",
    "mod-comma  (mod-,)   Increment the number of windows in the master area",
    "mod-period (mod-.)   Deincrement the number of windows in the master area",
    "",
    "-- quit, or restart",
    "mod-Shift-q  Quit xmonad",
    "mod-q        Restart xmonad",
    "mod-[1..9]   Switch to workSpace N",
    "",
    "-- Workspaces & screens",
    "mod-Shift-[1..9]   Move client to workspace N",
    "mod-{w,e,r}        Switch to physical/Xinerama screens 1, 2, or 3",
    "mod-Shift-{w,e,r}  Move client to screen 1, 2, or 3",
    "",
    "-- Mouse bindings: default actions bound to mouse events",
    "mod-button1  Set the window to floating mode and move by dragging",
    "mod-button2  Raise the window to the top of the stack",
    "mod-button3  Set the window to floating mode and resize by dragging"]