system/home/ui/xmonad/config.hs

--
-- 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.
--

-- Imports for Polybar
import qualified Codec.Binary.UTF8.String as UTF8
import qualified DBus as D
import qualified DBus.Client as D
import qualified Data.Map as M
import Data.Monoid
import System.Exit
import XMonad
import XMonad.Actions.CycleSelectedLayouts (cycleThroughLayouts)
import XMonad.Actions.EasyMotion
  ( ChordKeys (..),
    EasyMotionConfig (..),
    selectWindow,
  )
import XMonad.Hooks.DynamicLog
import XMonad.Hooks.EwmhDesktops
import XMonad.Hooks.ManageDocks
import XMonad.Hooks.ManageHelpers
  ( composeOne,
    doCenterFloat,
    isDialog,
    (-?>),
  )
import XMonad.Hooks.StatusBar
import XMonad.Hooks.StatusBar.PP
import XMonad.Layout.BoringWindows (boringWindows)
import XMonad.Layout.Gaps (gaps)
import XMonad.Layout.Grid
import XMonad.Layout.LimitWindows (limitWindows)
import XMonad.Layout.NoBorders (smartBorders)
import XMonad.Layout.Spacing (spacing)
import XMonad.Layout.ThreeColumns (ThreeCol (..))
import qualified XMonad.StackSet as W
import XMonad.Util.EZConfig
import XMonad.Util.Run

-- The preferred terminal program, which is used in a binding below and by
-- certain contrib modules.
--
myTerminal = "alacritty"

-- Whether focus follows the mouse pointer.
myFocusFollowsMouse :: Bool
myFocusFollowsMouse = False

-- Whether clicking on a window to focus also passes the click to the window
myClickJustFocuses :: Bool
myClickJustFocuses = False

-- Width of the window border in pixels.
--
myBorderWidth = 2

-- modMask lets you specify which modkey you want to use. The default
-- is mod1Mask ("left alt").  You may also consider using mod3Mask
-- ("right alt"), which does not conflict with emacs keybindings. The
-- "windows key" is usually mod4Mask.
--
myModMask = mod1Mask

-- Workspaces

webWs = "web"

finWs = "fin"

sysWs = "sys"

comWs = "com"

devWs = ["dev", "dev2", "dev3"]

myWorkspaces = [webWs] <> devWs <> [finWs, sysWs, comWs]

-- Colors

blue = "#2E9AFE"

gray = "#7F7F7F"

orange = "#ea4300"

purple = "#9058c7"

red = "#722222"

-- Border colors for unfocused and focused windows, respectively.
--
myNormalBorderColor = gray

myFocusedBorderColor = blue

main :: IO ()
main = mkDbusClient >>= main'

main' :: D.Client -> IO ()
main' dbus =
  xmonad . docks . ewmhFullscreen . ewmh $
    def
      { -- simple stuff
        terminal = myTerminal,
        focusFollowsMouse = myFocusFollowsMouse,
        clickJustFocuses = myClickJustFocuses,
        borderWidth = myBorderWidth,
        modMask = myModMask,
        workspaces = myWorkspaces,
        normalBorderColor = myNormalBorderColor,
        focusedBorderColor = myFocusedBorderColor,
        -- key bindings
        keys = myKeys,
        mouseBindings = myMouseBindings,
        -- hooks, layouts
        layoutHook = myLayout,
        manageHook = myManageHook,
        handleEventHook = myEventHook,
        logHook = myPolybarLogHook dbus,
        startupHook = myStartupHook
      }

------------------------------------------------------------------------
-- Polybar settings (needs DBus client).
--
mkDbusClient :: IO D.Client
mkDbusClient = do
  dbus <- D.connectSession
  D.requestName dbus (D.busName_ "org.xmonad.log") opts
  return dbus
  where
    opts = [D.nameAllowReplacement, D.nameReplaceExisting, D.nameDoNotQueue]

-- Emit a DBus signal on log updates
dbusOutput :: D.Client -> String -> IO ()
dbusOutput dbus str =
  let opath = D.objectPath_ "/org/xmonad/Log"
      iname = D.interfaceName_ "org.xmonad.Log"
      mname = D.memberName_ "Update"
      signal = D.signal opath iname mname
      body = [D.toVariant $ UTF8.decodeString str]
   in D.emit dbus $ signal {D.signalBody = body}

polybarHook :: D.Client -> PP
polybarHook dbus =
  let wrapper c = wrap ("%{F" <> c <> "}") "%{F-}"
   in def
        { ppOutput = dbusOutput dbus,
          ppCurrent = wrapper blue,
          ppVisible = wrapper purple,
          ppUrgent = wrapper orange,
          ppHidden = wrapper gray,
          ppHiddenNoWindows = wrapper red,
          ppTitle = wrapper purple . shorten 90
        }

myPolybarLogHook dbus = myLogHook <+> dynamicLogWithPP (polybarHook dbus)

------------------------------------------------------------------------
-- 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 = avoidStruts . smartBorders $ (Mirror tiled ||| tiled ||| column3 ||| full)
  where
    full = Full
    tiled = gapSpaced 5 $ Tall nmaster incRatio ratio
    column3 = gapSpaced 5 $ ThreeColMid nmaster incRatio ratio

    nmaster = 1
    incRatio = (3 / 100)
    ratio = (1 / 2)

    gapSpaced g = spacing g . myGaps g
    myGaps gap = gaps [(U, gap), (D, gap), (L, gap), (R, gap)]

------------------------------------------------------------------------
-- Startup hook

-- Perform an arbitrary action each time xmonad starts or is restarted
-- with mod-q.  Used by, e.g., XMonad.Layout.PerWorkspace to initialize
-- per-workspace layout choices.
--
-- By default, do nothing.
myStartupHook = return ()

------------------------------------------------------------------------
-- Status bars and logging

-- Perform an arbitrary action on each internal state change or X event.
-- See the 'XMonad.Hooks.DynamicLog' extension for examples.
--
myLogHook = return ()

------------------------------------------------------------------------
-- Event handling

-- * EwmhDesktops users should change this to ewmhDesktopsEventHook

--
-- Defines a custom handler function for X Events. The function should
-- return (All True) if the default handler is to be run afterwards. To
-- combine event hooks use mappend or mconcat from Data.Monoid.
--
myEventHook = mempty

------------------------------------------------------------------------
-- Window rules:

-- Execute arbitrary actions and WindowSet manipulations when managing
-- a new window. You can use this to, for example, always float a
-- particular program, or have a client always appear on a particular
-- workspace.
--
-- 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.
--
myManageHook = manageApps
  where
    isRole = stringProperty "WM_WINDOW_ROLE"
    isPopup = isRole =? "pop-up"
    manageApps =
      composeOne
        [ resource =? "desktop_window" -?> doIgnore,
          resource =? "kdesktop" -?> doIgnore,
          -- general
          isPopup -?> doCenterFloat,
          isDialog -?> doCenterFloat,
          -- apps
          className =? "Gimp" -?> doFloat,
          className =? "nheko" -?> doShift comWs,
          className =? "KotatogramDesktop" -?> doShift comWs,
          className =? "gnome-calculator" -?> doCenterFloat
        ]

------------------------------------------------------------------------
-- Key bindings. Add, modify or remove key bindings here.
--
myKeys conf =
  mkKeymap conf $
    -- launch a terminal
    [ ("M-S-<Return>", spawn $ XMonad.terminal conf),
      -- launch a 'flameshot' to screenshot
      ("M-S-s", safeSpawn "flameshot" ["gui"]),
      -- launch 'librewolf' browser
      ("M-S-b", spawn "librewolf"),
      -- launch 'dmenu_run' to choose applications
      ("M-p", spawn "dmenu_run"),
      -- close focused window
      ("M4-S-c", kill),
      -- Rotate through the available layout algorithms
      ("M-<Space>", cycleThroughLayouts ["Full", "Mirror Spacing Tall"]),
      ("M-<Tab>", cycleThroughLayouts ["Spacing ThreeCol", "Spacing Tall", "Mirror Spacing Tall"]),
      --  Reset the layouts on the current workspace to default
      ("M-S-<Space>", setLayout $ XMonad.layoutHook conf),
      -- Resize viewed windows to the correct size
      ("M-n", refresh),
      -- Easy moution to focus windows
      ("M-s", selectWindow easyMotionConfig >>= (`whenJust` windows . W.focusWindow)),
      -- Move focus to the next window
      ("M-j", windows W.focusDown),
      -- Move focus to the previous window
      ("M-k", windows W.focusUp),
      -- Move focus to the master window
      ("M-m", windows W.focusMaster),
      -- Swap the focused window and the master window
      ("M-<Return>", windows W.swapMaster),
      -- Swap the focused window with the next window
      ("M-S-j", windows W.swapDown),
      -- Swap the focused window with the previous window
      ("M-S-k", windows W.swapUp),
      -- Shrink the master area
      ("M-h", sendMessage Shrink),
      -- Expand the master area
      ("M-l", sendMessage Expand),
      -- Push window back into tiling
      ("M-t", withFocused $ windows . W.sink),
      -- Increment the number of windows in the master area
      ("M-,", sendMessage $ IncMasterN 1),
      -- Deincrement the number of windows in the master area
      ("M-.", sendMessage $ IncMasterN (-1)),
      -- Toggle the status bar gap
      -- Use this binding with avoidStruts from Hooks.ManageDocks.
      -- See also the statusBar function from Hooks.DynamicLog.
      --
      -- , ("M-b", sendMessage ToggleStruts)

      -- Lock screen
      ("M4-l", spawn "betterlockscreen --lock --display 1 -- -e"),
      -- Change volume
      ("<XF86AudioMute>", spawn "amixer -q sset Master toggle"),
      ("<XF86AudioRaiseVolume>", spawn "amixer -q sset Master 5%+"),
      ("<XF86AudioLowerVolume>", spawn "amixer -q sset Master 5%-"),
      -- Keyboard apps
      ("<XF86Calculator>", spawn "gnome-calculator"),
      -- Quit xmonad
      ("M4-S-q", io exitSuccess)
    ]
      ++
      --
      -- mod-[1..9], Switch to workspace N
      -- mod-shift-[1..9], Move client to workspace N
      --
      [ ("M-" ++ m ++ show k, windows $ f i)
        | (i, k) <- zip (XMonad.workspaces conf) [1 .. 9],
          (f, m) <- [(W.greedyView, ""), (W.shift, "S-")]
      ]
  where
    easyMotionConfig =
      def
        { sKeys = AnyKeys [xK_a, xK_o, xK_e, xK_u, xK_h, xK_t, xK_n, xK_s]
        }

------------------------------------------------------------------------
-- 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, button1), \w -> focus w >> mouseMoveWindow w >> windows W.shiftMaster),
      -- mod-button2, Raise the window to the top of the stack
      ((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)
    ]