system/programs/xmonad/xmonad.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.
--

import           Data.Monoid
import           System.Exit
import           XMonad
import           XMonad.Hooks.DynamicLog
import           XMonad.Hooks.EwmhDesktops
import           XMonad.Hooks.ManageDocks
import           XMonad.Hooks.StatusBar
import           XMonad.Hooks.StatusBar.PP
import           XMonad.Layout.NoBorders
import           XMonad.Layout.PerWorkspace
import           XMonad.Util.EZConfig
import           XMonad.Util.Run

import qualified Data.Map                   as M
import qualified XMonad.StackSet            as W

-- 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   = 3

-- 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

-- 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    = ["web", "front", "back", "chat"] <> map show [5..9]

-- Border colors for unfocused and focused windows, respectively.
--
myNormalBorderColor  = "#444"
myFocusedBorderColor = "#f00"

------------------------------------------------------------------------
-- 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 'dmenu_run' to choose applications
  , ("M-p", spawn "dmenu_run")

  -- close focused window
  , ("M-S-c", kill)

   -- 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 conf)

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

  -- 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)

  -- Quit xmonad
  , ("M4-S-q", io exitSuccess)

  -- Lock screen
  , ("M4-l", spawn "i3lock -e -c 000000")

  -- Change volume
  , ("<XF86AudioMute>",         spawn "amixer -qD pulse sset Master toggle")
  , ("<XF86AudioRaiseVolume>",  spawn "amixer -qD pulse sset Master 1%+")
  , ("<XF86AudioLowerVolume>",  spawn "amixer -qD pulse sset Master 1%-")

  -- Keyboard apps
  , ("<XF86Calculator>", spawn "gnome-calculator")

  -- Restart xmonad
  , ("M-q", spawn "xmonad --recompile; xmonad --restart")

  -- Run xmessage with a summary of the default keybindings (useful for beginners)
  , ("M-S-/", xmessage help)

  ]
  ++

  --
  -- 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-")]]


------------------------------------------------------------------------
-- 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)
    ]

------------------------------------------------------------------------
-- 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
  $ onWorkspaces ["web", "chat"] (myFull ||| myTall (1/2))
  $ makeDefaultLayout (1/1.5)
  where
    makeDefaultLayout ratio = myTall ratio
      ||| Mirror (myTall ratio)
      ||| myFull

    myTall = smartBorders . Tall nmaster delta
    myFull = noBorders Full

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

    -- 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 = composeAll
  [ className =? "MPlayer"        --> doFloat
  , className =? "Gimp"           --> doFloat
  , resource  =? "desktop_window" --> doIgnore
  , resource  =? "kdesktop"       --> doIgnore
  -- my libs
  , resource  =? "hwt"            --> doFloat
  ]

------------------------------------------------------------------------
-- 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

------------------------------------------------------------------------
-- 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 ()

------------------------------------------------------------------------
-- 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 ()

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

-- Run xmonad with the settings you specify. No need to modify this.
--
main = xmonad . ewmhFullscreen . ewmh . xmobarProp $ defaults

-- 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 = 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            = myLogHook
  , 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 'alacritty' terminal"
  , "mod-Shift-s      Launch 'flameshot' to screenshot"
  , "mod-p            Launch 'dmenu_run'"
  , "mod-Shift-c      Close/kill the focused window"
  , "mod-Shift-/      Show this help message with the default keybindings"
  , ""
  , "-- move focus up or down the window stack"
  , "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"
  , ""
  , "-- workspace layout"
  , "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"
  , "mod-h            Shrink the master area"
  , "mod-l            Expand the master area"
  , "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"
  , ""
  , "-- System "
  , "mod4-l         Lock screen"
  , "mod4-Shift-q   Quit xmonad"
  , "mod-q          Restart xmonad"
  , ""
  , "-- Workspaces & screens"
  , "mod-[1..9]         Switch to workSpace N"
  , "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"
  , ""
  , "-- Volume"
  , "<XF86AudioMute>          Mute/Unmute"
  , "<XF86AudioRaiseVolume>   Increase volume by 1%"
  , "<XF86AudioLowerVolume>   Decrease volume by 1%"
  ]