xmonad.hs

-- IMPORTS

import XMonad
import Data.Monoid
import System.Exit
import XMonad.Util.SpawnOnce
import XMonad.Util.Run
import XMonad.Layout.Spacing
import XMonad.Hooks.ManageDocks
import XMonad.Layout.IndependentScreens

import qualified XMonad.StackSet as W
import qualified Data.Map        as M
import qualified XMonad.Layout.Decoration as XMonad.Layout.LayoutModifier
import XMonad.Hooks.DynamicLog (dynamicLogWithPP, xmobarPP, xmobarColor, PP (ppCurrent, ppVisible, ppHidden, ppOutput, ppHiddenNoWindows, ppTitle, ppSep, ppUrgent, ppExtras, ppOrder), wrap, shorten)
import XMonad.Util.NamedScratchpad (namedScratchpadFilterOutWorkspacePP)
import GHC.IO.Handle

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

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

-- 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 :: Dimension
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 :: KeyMask
myModMask       = mod4Mask

-- The default number of workspaces (virtual screens) and their names.
-- By default we use numeric strings, but any string may be used as a
-- workspace name. The number of workspaces is determined by the length
-- of this list.
--
-- A tagging example:
--
-- > workspaces = ["web", "irc", "code" ] ++ map show [4..9]
--
myWorkspaces :: [[Char]]
myWorkspaces    = ["1","2","3","4","5","6","7","8","9"]

-- Border colors for unfocused and focused windows, respectively.
--
myNormalBorderColor :: [Char]
myNormalBorderColor  = "#dddddd"
myFocusedBorderColor :: [Char]
myFocusedBorderColor = "#01caff"

------------------------------------------------------------------------
-- Key bindings. Add, modify or remove key bindings here.
--
myKeys :: XConfig Layout -> M.Map (KeyMask, KeySym) (X ())
myKeys conf@XConfig {XMonad.modMask = modm} = M.fromList $

    -- launch a terminal
    [ ((modm,               xK_Return), spawn $ XMonad.terminal conf)

    -- launch flameshot
    , ((modm,               xK_Print), spawn "flameshot gui")

    -- launch dmenu
    , ((modm,               xK_d     ), spawn "rofi -show drun")

    -- launch gmrun
    , ((modm .|. shiftMask, xK_p     ), spawn "gmrun")

    -- launch gmrun
    , ((modm .|. shiftMask, xK_m     ), spawn "pactl -- set-source-mute 2 toggle")

    -- close focused window
    , ((modm .|. shiftMask, xK_c     ), kill)

     -- Rotate through the available layout algorithms
    , ((modm,               xK_space ), sendMessage NextLayout)

    --  Reset the layouts on the current workspace to default
    , ((modm .|. shiftMask, xK_space ), setLayout $ XMonad.layoutHook conf)

    -- Resize viewed windows to the correct size
    , ((modm,               xK_n     ), refresh)

    -- Move focus to the next window
    , ((modm,               xK_Tab   ), windows W.focusDown)

    -- Move focus to the next window
    , ((modm,               xK_j     ), windows W.focusDown)

    -- Move focus to the previous window
    , ((modm,               xK_k     ), windows W.focusUp  )

    -- Move focus to the master window
    , ((modm,               xK_m     ), windows W.focusMaster  )

    -- Swap the focused window and the master window
    , ((modm .|. shiftMask, xK_Return), windows W.swapMaster)

    -- Swap the focused window with the next window
    , ((modm .|. shiftMask, xK_j     ), windows W.swapDown  )

    -- Swap the focused window with the previous window
    , ((modm .|. shiftMask, xK_k     ), windows W.swapUp    )

    -- Shrink the master area
    , ((modm,               xK_h     ), sendMessage Shrink)

    -- Expand the master area
    , ((modm,               xK_l     ), sendMessage Expand)

    -- Push window back into tiling
    , ((modm,               xK_t     ), withFocused $ windows . W.sink)

    -- Increment the number of windows in the master area
    , ((modm              , xK_comma ), sendMessage (IncMasterN 1))

    -- Deincrement the number of windows in the master area
    , ((modm              , xK_period), sendMessage (IncMasterN (-1)))

    -- Toggle the status bar gap
    -- Use this binding with avoidStruts from Hooks.ManageDocks.
    -- See also the statusBar function from Hooks.DynamicLog.
    --
    -- , ((modm              , xK_b     ), sendMessage ToggleStruts)

    -- Quit xmonad
    , ((modm .|. shiftMask, xK_q     ), io exitSuccess)

    -- Restart xmonad
    , ((modm              , xK_q     ), spawn "xmonad --recompile; xmonad --restart")

    -- Run xmessage with a summary of the default keybindings (useful for beginners)
    , ((modm .|. shiftMask, xK_slash ), spawn ("echo \"" ++ help ++ "\" | xmessage -file -"))
    ]
    ++

    --
    -- mod-[1..9], Switch to workspace N
    -- mod-shift-[1..9], Move client to workspace N
    --
    [((m .|. modm, k), windows $ onCurrentScreen f i)
        | (i, k) <- zip (workspaces' conf) [xK_1 .. xK_9]
        , (f, m) <- [(W.greedyView, 0), (W.shift, shiftMask)]]
    ++

    --
    -- 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
    --
    [((m .|. modm, key), screenWorkspace sc >>= flip whenJust (windows . f))
        | (key, sc) <- zip [xK_w, xK_e, xK_r] [0..]
        , (f, m) <- [(W.view, 0), (W.shift, shiftMask)]]

------------------------------------------------------------------------
-- Mouse bindings: default actions bound to mouse events
--
myMouseBindings :: XConfig l -> M.Map (KeyMask, Button) (Window -> X ())
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)
    ]

------------------------------------------------------------------------
-- 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 :: XMonad.Layout.LayoutModifier.ModifiedLayout Spacing (XMonad.Layout.LayoutModifier.ModifiedLayout AvoidStruts (Choose Tall Full)) a
myLayout = spacingRaw True (Border 10 10 10 10) True (Border 10 10 10 10) True $
  avoidStruts (tiled ||| Full)
  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

------------------------------------------------------------------------
-- 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 :: Query (Endo WindowSet)
myManageHook = composeAll
    [ className =? "MPlayer"          --> doFloat
    , className =? "Gimp"             --> doFloat
    , className =? "Gnome-calculator" --> doFloat
    , resource  =? "desktop_window"   --> doIgnore
    , resource  =? "kdesktop"         --> doIgnore ]

------------------------------------------------------------------------
-- 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 :: Event -> X All
myEventHook = mempty

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

------------------------------------------------------------------------
-- 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 :: Handle -> X ()
myLogHook xmproc = dynamicLogWithPP $ namedScratchpadFilterOutWorkspacePP $ xmobarPP
  { ppOutput = hPutStrLn xmproc

  , ppCurrent = xmobarColor "#98be65" "" . wrap "[" "]" -- Current workspace

  , ppVisible = xmobarColor "#98be65" "" -- Visible but not current workspace

  , ppHidden = xmobarColor "#82AAFF" "" . wrap "*" "" -- Hidden workspace

  , ppHiddenNoWindows = xmobarColor "#c792ea" "" -- Hidden workspace

  , ppTitle = xmobarColor "b3afc2" "" . shorten 60 -- Title of active window

  , ppSep = "<fc=#666666> | </fc>" -- Separators

  , ppUrgent = xmobarColor "#C45500" "" . wrap "!" "!" -- Urgent workspace

  , ppExtras = [windowCount]
  }

------------------------------------------------------------------------
-- 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 ()
myStartupHook :: X ()
myStartupHook = do
  spawnOnce "setxkbmap us -option compose:ralt"
  spawnOnce "xmodmap -e \"keysym Alt_R = Multi_key\""
  spawnOnce "nitrogen --restore &"
  spawnOnce "compton &"
  spawnOnce "xrandr --output DVI-D-0 --off --output DP-0 --primary --mode 3840x2160 --pos 0x1080 --rotate normal --output DP-1 --off --output HDMI-0 --mode 1920x1080 --pos 960x0 --rotate normal --output DP-2 --off --output DP-3 --off --output DP-4 --off --output DP-5 --off"

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

-- Run xmonad with the settings you specify. No need to modify this.
--
main :: IO ()
main = do
  xmproc0 <- spawnPipe "xmobar -x 0 ~/.config/xmobar/xmobarrc"
  xmproc1 <- spawnPipe "xmobar -x 1 ~/.config/xmobar/xmobarrc"

  xmonad $ docks $ def {
    -- simple stuff
      terminal           = myTerminal
    , focusFollowsMouse  = myFocusFollowsMouse
    , clickJustFocuses   = myClickJustFocuses
    , borderWidth        = myBorderWidth
    , modMask            = myModMask
    , workspaces         = withScreens 2 myWorkspaces
    , normalBorderColor  = myNormalBorderColor
    , focusedBorderColor = myFocusedBorderColor

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

  -- hooks, layouts
    , layoutHook         = myLayout
    , manageHook         = myManageHook
    , handleEventHook    = myEventHook
    , logHook = dynamicLogWithPP $ namedScratchpadFilterOutWorkspacePP $ xmobarPP
        -- XMOBAR SETTINGS
        { ppOutput = \x -> hPutStrLn xmproc0 x >> hPutStrLn xmproc1 x

        , ppCurrent = xmobarColor "#98be65" "" . wrap "[" "]" -- Current workspace

        , ppVisible = xmobarColor "#98be65" "" -- Visible but not current workspace

        , ppHidden = xmobarColor "#82AAFF" "" . wrap "*" "" -- Hidden workspace

        , ppHiddenNoWindows = xmobarColor "#c792ea" "" -- Hidden workspace

        , ppTitle = xmobarColor "b3afc2" "" . shorten 60 -- Title of active window

        , ppSep = "<fc=#666666> | </fc>" -- Separators

        , ppUrgent = xmobarColor "#C45500" "" . wrap "!" "!" -- Urgent workspace

        , ppExtras = [windowCount]

        , ppOrder = \(ws:l:t:ex) -> [ws,l] ++ ex ++ [t]
        },
      startupHook        = myStartupHook
    }

-- | 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"]