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import XMonad hiding ((|||))
import XMonad.Util.EZConfig
import qualified XMonad.StackSet as S

import XMonad.Hooks.EwmhDesktops
import XMonad.Hooks.ManageHelpers
import XMonad.Hooks.ManageDocks
import XMonad.Hooks.InsertPosition
import XMonad.Hooks.SetWMName

import XMonad.Layout.Tabbed
import XMonad.Layout.MultiColumns
import XMonad.Layout.TwoPane
import XMonad.Layout.OneBig
import XMonad.Layout.Grid

import XMonad.Layout.Groups.Examples
import XMonad.Layout.Groups.Helpers

import XMonad.Layout.NoBorders
import XMonad.Layout.Reflect
import XMonad.Layout.MultiToggle
import XMonad.Layout.MultiToggle.Instances
import XMonad.Layout.Renamed (Rename(..), renamed)
import XMonad.Layout.LayoutCombinators
import XMonad.Layout.LayoutModifier
import XMonad.Layout.Monitor
import XMonad.Layout.BinarySpacePartition
import XMonad.Layout.BorderResize

import XMonad.Util.Themes
import XMonad.Util.NamedScratchpad
import XMonad.Util.Dmenu (menuMapArgs)

import XMonad.Actions.SpawnOn
import XMonad.Actions.CycleWS
import XMonad.Actions.WindowBringer
import XMonad.Actions.GroupNavigation
import XMonad.Actions.FloatKeys
import XMonad.Actions.UpdatePointer

import Data.Maybe
import Control.Monad (when)
import Data.Map (Map, fromList, member)
import Data.List (unionBy)

import System.Exit
import System.Posix.Unistd

workspaces :: [WorkspaceId]
workspaces = map show [1 .. 9 :: Int]

customTabTheme host = (theme xmonadTheme)
  { fontName      = "xft:Iosevka Medium-12"
  , decoHeight    = decoHeightOn host
  , activeTextColor     = "#222222"
  , activeColor         = "#909636"
  , inactiveTextColor   = "#999999"
  , inactiveColor       = "#161616"
  , activeBorderColor   = "#909636"
  , inactiveBorderColor = "#161616" }

customLayoutHook host = id
  . smartBorders
  . ModifiedLayout (hudMonitor host)
  . mkToggle (single NBFULL)
  $ tiles ||| two ||| tabs ||| frame ||| bsp ||| grid ||| groups
  where
    tiles  = name "tiles" $ id
                          . mkToggle (single REFLECTX)
                          . mkToggle (single REFLECTY)
                          $ multiCol [1, 2, 0] 1 delta (1/3)
    tabs   = name "tabs"  $ tabbed shrinkText (customTabTheme host)
    two    = name "two"   $ TwoPane delta (1/2)
    frame  = name "frame" $ id
                          . mkToggle (single REFLECTX)
                          . mkToggle (single REFLECTY)
                          . reflectVert
                          $ OneBig (2/3) (4/5)
    bsp    = name "bsp"   $ borderResize (emptyBSP)
    grid   = name "grid"  $ Grid
    groups = name "groups" $ rowOfColumns
    delta  = 1/24
    name n = renamed [Replace n]

-- layout names for layout selection dialog
layoutNames = fromList [ ("0: Multi-column tiles"      , "tiles")
                       , ("1: Tabbed windows"          , "tabs")
                       , ("2: Two column stack"        , "two")
                       , ("3: One large framed window" , "frame")
                       , ("4: Binary space partition"  , "bsp")
                       , ("5: Grid"                    , "grid")
                       , ("6: Grouped columns"         , "groups") ]

floatRectTop    h = S.RationalRect (1/20) 0      (18/20) h
floatRectBottom h = S.RationalRect (1/20) (1-h)  (18/20) h
floatRectLeft   w = S.RationalRect 0      (1/20) w       (18/20)
floatRectRight  w = S.RationalRect (1-w)  (1/20) w       (18/20)

dropUp        = floatRectBottom $ 2/3
dropUpLarge   = floatRectBottom $ 18/20
dropDown      = floatRectTop    $ 2/3
dropDownLarge = floatRectTop    $ 18/20
sideBarLeft   = floatRectLeft   $ 1/3
sideBarRight  = floatRectRight  $ 1/3

scratchpads host =
  [ NS "terminal"      "kitty --class=scratchterm"                             (className =? "scratchterm")
       (customFloating $ hideScreenBorder host dropDown)
  , NS "browser"       "env MOZ_USE_XINPUT2=1 firefox --no-remote -P scratchpad --class scratchfire" (className =? "scratchfire")
       (customFloating $ hideScreenBorder host dropDownLarge)
  , NS "thesaurus"     "artha"                                                 (className =? "Artha")
       (customFloating $ hideScreenBorder host sideBarLeft)
  , NS "literature"    "zotero"                                                (className =? "Zotero")
       (customFloating $ hideScreenBorder host dropDownLarge)
  , NS "calculator"    "speedcrunch"                                           (className =? "SpeedCrunch")
       (customFloating $ hideScreenBorder host sideBarLeft)
  , NS "messaging"     "telegram-desktop"                                      ((className =? "TelegramDesktop") <&&> (title /=? "Media viewer"))
       (customFloating $ hideScreenBorder host sideBarRight)
  , NS "notes"         "emacsclient --create-frame --frame-parameters='(quote (name . \"notemacs\"))' ~/org/inbox.org" (title =? "notemacs")
       (customFloating $ hideScreenBorder host dropDownLarge)
  ]

hudMonitor host = monitor
  { prop = Title "hud"
  , XMonad.Layout.Monitor.name = "hud"
  , rect = Rectangle ((screenWidthOn host) - 530) ((screenHeightOn host) - 350) 480 300
  , opacity    = 0.8
  , persistent = True }

windowBringerDmenuConfig = def { menuCommand  = "rofi"
                               , menuArgs     = [ "-p", "win", "-dmenu", "-i" ] }

hostSpecificKeybindings host = case host of
  "asterix" -> [ ("M-i b"   , showNotification "Battery"
                                               "`acpi | cut -c 10-`")
               , ("M-i c"   , showNotification "`acpi --thermal | awk '{print $4}'`°C"
                                               "`cat /proc/acpi/ibm/fan | awk '/speed/{print $2}'` RPM")
               , ("M-c n"   , spawn "networkmanager_dmenu") ]
  "athena"  -> [ ("M-i b" , showNotification "Battery"
                                             "`acpi | cut -c 10-`")
               , ("M-i c" , showNotification "`acpi --thermal | awk '{print $4}'`°C"
                                             "`cat /proc/acpi/ibm/fan | awk '/speed/{print $2}'` RPM")
               , ("M-c n" , spawn "networkmanager_dmenu")
               , ("<XF86MonBrightnessUp>"   , spawn "brightnessctl s +5%")
               , ("<XF86MonBrightnessDown>" , spawn "brightnessctl s 5%-")
               , ("<XF86AudioRaiseVolume>"  , spawn "amixer sset Master 10%+")
               , ("<XF86AudioLowerVolume>"  , spawn "amixer sset Master 10%-")
               , ("<XF86AudioMute>"         , spawn "amixer sset Master toggle")
               , ("<Print>"                 , namedScratchpadAction (scratchpads host) "terminal")
               , ("M-c p"                   , spawn "flameshot gui") ]
  "obelix"  -> [ ("M-i g" , showNotification "GPU"
                                             "`nvidia-smi --query-gpu=name,temperature.gpu,utilization.gpu,utilization.memory --format=csv,noheader | awk -F',' '{print $1 \" running at\" $2 \"°C due to\" $3 \" load and\" $4 \" memory usage\"}'`") ]
  "hephaestus" -> [ ("M-i g" , showNotification "GPU"
                                             "`nvidia-smi --query-gpu=name,temperature.gpu,utilization.gpu,utilization.memory --format=csv,noheader | awk -F',' '{print $1 \" running at\" $2 \"°C due to\" $3 \" load and\" $4 \" memory usage\"}'`") ]
  _         -> [ ]

commonKeybindings host =
-- xmonad session control
  [ ("C-M1-<Escape>"    , io (exitWith ExitSuccess))
  , ("C-M1-<Backspace>" , spawn "xmonad --restart")
  , ("C-M1-l"           , spawn "i3lock -c 000000")

-- application launchers
  , ("M-<Space>"     , spawn "rofi -show combi")
  , ("M-<Return>"    , spawn "kitty")
  , ("M-S-<Return>"  , spawn "emacsclient --create-frame")
  , ("<Print>"       , spawn "flameshot gui")

-- password management
  , ("M-p"     , spawn "passrofi")

-- window management
  , ("M-q"           , windows $ S.shift "NSP")
  , ("M-S-q"         , kill)
  , ("M-<Backspace>" , nextMatch History (return True))

-- window movement
  , ("M-j"           , focusDown)
  , ("M-k"           , focusUp)
  , ("M-S-j"         , swapDown)
  , ("M-S-k"         , swapUp)

-- group control
  , ("M-h"           , bindOnLayout [ ("groups", focusGroupUp)
                                    , ("", sendMessage Shrink) ] )
  , ("M-l"           , bindOnLayout [ ("groups", focusGroupDown)
                                    , ("", sendMessage Expand) ] )
  , ("M-S-h"         , bindOnLayout [ ("groups", moveToGroupUp False)
                                    , ("", sendMessage Shrink) ] )
  , ("M-S-l"         , bindOnLayout [ ("groups", moveToGroupDown False)
                                    , ("", sendMessage Expand) ] )
  , ("M-S-<Up>"      , zoomWindowOut)
  , ("M-S-<Down>"    , zoomWindowIn)
  , ("M-S-<Right>"   , zoomColumnIn)
  , ("M-S-<Left>"    , zoomColumnOut)

-- window bringer
  , ("M-a"           , gotoMenuConfig  windowBringerDmenuConfig)
  , ("M-S-a"         , bringMenuConfig windowBringerDmenuConfig)

-- scratchpads
  , ("M-b"           , namedScratchpadAction (scratchpads host) "browser")
  , ("M-t"           , namedScratchpadAction (scratchpads host) "thesaurus")
  , ("M-z"           , namedScratchpadAction (scratchpads host) "literature")
  , ("M-r"           , namedScratchpadAction (scratchpads host) "calculator")
  , ("M-m"           , namedScratchpadAction (scratchpads host) "messaging")
  , ("M-n"           , namedScratchpadAction (scratchpads host) "notes") ] ++

-- workspace selection
  [ (p ++ [k]        , windows $ f i) | (i, k) <- zip Main.workspaces ['1' .. '9']
                                      , (p, f) <- [ ("M-"   , S.view)
                                                  , ("M-S-" , S.shift) ] ] ++
  [ ("C-<Backspace>" , toggleWS' ["NSP"])

-- workspace movement
  , ("M-s j"           , moveTo  Next nonEmptyWS)
  , ("M-s k"           , moveTo  Prev nonEmptyWS)
  , ("M-S-s j"         , shiftTo Next nonEmptyWS >> moveTo Next nonEmptyWS)
  , ("N-S-s k"         , shiftTo Prev nonEmptyWS >> moveTo Prev nonEmptyWS)

-- workspace layout management
  , ("M-y"           , refresh)
  , ("M-v"           , layoutMenu)
  , ("M-s l"         , sendMessage NextLayout)
  , ("M-s +"         , sendMessage $ IncMasterN   1)
  , ("M-s -"         , sendMessage $ IncMasterN (-1))
  , ("M-s y"         , sendMessage $ Toggle REFLECTY)
  , ("M-s x"         , sendMessage $ Toggle REFLECTX)
  , ("M-s f"         , sendMessage $ Toggle NBFULL)

-- floating placement
  , ("M-w t"         , withFocused $ windows . S.sink)
  , ("M-w j"         , withFocused $ placeFloating host dropUp)
  , ("M-w S-j"       , withFocused $ placeFloating host dropUpLarge)
  , ("M-w k"         , withFocused $ placeFloating host dropDown)
  , ("M-w S-k"       , withFocused $ placeFloating host dropDownLarge)
  , ("M-w h"         , withFocused $ placeFloating host sideBarLeft)
  , ("M-w l"         , withFocused $ placeFloating host sideBarRight)

-- system information
  , ("M-i t"         , showNotification "`date +%T`" "`date +\"%Y-%m-%d\"`")
  , ("M-i l"         , showNotification "Load" "`cut -c -14 /proc/loadavg`")

-- system control
  , ("M-c <Up>"      , spawn "pactl set-sink-volume @DEFAULT_SINK@ +10%")
  , ("M-c <Down>"    , spawn "pactl set-sink-volume @DEFAULT_SINK@ -10%")
  , ("M-c m"         , spawn "pactl set-sink-mute @DEFAULT_SINK@ toggle")
  , ("M-c s"         , spawn "systemctl suspend")
  , ("M-c h"         , spawn "systemctl hibernate") ]

customKeybindings host = unionBy (\(keyA,_) (keyB,_) -> keyA == keyB)
                                 (hostSpecificKeybindings host)
                                 (commonKeybindings       host)

customMousebindings (XConfig {XMonad.modMask = modMask}) = fromList
  [ ((modMask .|. shiftMask, button1), \w -> focus w >> mouseMoveWindow w)
  , ((modMask .|. shiftMask, button3), \w -> focus w >> mouseResizeWindow w) ]

customEventHook = do
  handleEventHook def
  fullscreenEventHook

customManageHook host = manageMonitor (hudMonitor host) <+> composeOne
  [ hasRole "GtkFileChooserDialog" -?> doRectFloat $ hideScreenBorder host dropDown
  , isParaviewDialog               -?> doRectFloat $ hideScreenBorder host dropDown
  , isTelegramMediaViewer          -?> doFullFloat
  , isDialog                       -?> doCenterFloat
  , isPrompter                     -?> doCenterFloat
  , transience
  , pure True -?> insertPosition Below Newer <+> namedScratchpadManageHook (scratchpads host) ]
  where
    hasRole x = stringProperty "WM_WINDOW_ROLE" =? x
    isParaviewDialog      = (className =? "ParaView") <&&> isDialog
    isPrompter            = (className =? "Gcr-prompter")
    isTelegramMediaViewer = (className =? "TelegramDesktop") <&&> (title =? "Media viewer")

customLogHook = do
  historyHook
  updatePointer (0.5, 0.5) (0, 0)
  customizeBorderWhen (isFloat <&&> isNotFullscreen) "#aadb0f" 6

customStartupHook host = do
  checkKeymap def (customKeybindings host)
  setWMName "LG3D"

main = do
  host <- fmap nodeName getSystemID
  xmonad $ ewmh
         $ docks
         $ def
    { modMask             = mod4Mask -- super key as modifier
    , borderWidth         = borderWidthOn host
    , normalBorderColor   = "#161616"
    , focusedBorderColor  = "#909636"
    , keys                = \c -> mkKeymap c (customKeybindings host)
    , mouseBindings       = customMousebindings
    , startupHook         = customStartupHook host
    , handleEventHook     = customEventHook
    , manageHook          = customManageHook host
    , logHook             = customLogHook
    , layoutHook          = customLayoutHook host }
    `additionalKeys`
    [ ((noModMask, xK_Menu) , namedScratchpadAction (scratchpads host) "terminal") ]

nonEmptyWS = WSIs $ return (\w -> nonNSP w && nonEmpty w)
  where nonNSP (S.Workspace tag _ _) = tag /= "NSP"
        nonEmpty = isJust . S.stack

showNotification title text = spawn ("notify-send \"" ++ title ++ "\" \"" ++ text ++ "\"")

-- layout selection dialog
layoutMenu :: X ()
layoutMenu = (askUserForLayout layoutNames) >>= setLayoutByName
  where
    setLayoutByName :: (Maybe String) -> X ()
    setLayoutByName value = case value of
      Just name -> sendMessage (JumpToLayout name)
      Nothing   -> return ()
    askUserForLayout :: Map String String -> X (Maybe String)
    askUserForLayout = menuMapArgs "rofi" [ "-p", "layout", "-dmenu", "-i" ]


-------------------------------------------------------------------------------
-- utilities for customizing borders of floating windows

withCurrentScreen     f = withWindowSet     $ \ws -> f (S.current ws)
withCurrentScreenRect f = withCurrentScreen $ \s  -> f (screenRect (S.screenDetail s))

screenResolution = withCurrentScreenRect $ \r -> return (rect_width r, rect_height r)

windowSize w = do
  r <- withDisplay $ (\d -> io $ getWindowAttributes d w)
  return (fromIntegral $ wa_width r, fromIntegral $ wa_height r)

isNotFullscreen :: Query Bool
isNotFullscreen = ask >>= (\w -> liftX $ do (ww, wh) <- windowSize w
                                            (sw, sh) <- screenResolution
                                            return $ not (ww == sw && wh == sh))

isFloat :: Query Bool
isFloat = ask >>= (\w -> liftX $ withWindowSet $ \ws -> return $ (member w (S.floating ws)))

customizeBorderWhen :: Query Bool -> String -> Dimension -> X ()
customizeBorderWhen q color width = withFocused $ \w -> runQuery q w >>= flip when (setWindowBorder' color width w)

setWindowBorder' :: String -> Dimension -> Window -> X ()
setWindowBorder' color width window = do
  XConf { display = d } <- ask
  ~(Just pixel) <- io $ initColor d color
  io $ setWindowBorder      d window pixel
  io $ setWindowBorderWidth d window width

-------------------------------------------------------------------------------
-- ugly hack to hide window border at screen boundary

placeFloating :: String -> S.RationalRect -> Window -> X ()
placeFloating host rect = windows . (flip S.float $ (hideScreenBorder host rect))

hideScreenBorder :: String -> S.RationalRect -> S.RationalRect
hideScreenBorder host (S.RationalRect x0 y0 w h) = S.RationalRect (x0-(bw/sw)) (y0-(bw/sh)) (w+((2*bw)/sw)) (h+((2*bw+1)/sh))
  where bw = 6
        sw = screenWidthOn  host
        sh = screenHeightOn host

screenWidthOn  host = case host of
  "hephaestus" -> 1920
  "majestix"   -> 1920
  "obelix"     -> 1280
  "asterix"    -> 1366
  "athena"     -> 2560
screenHeightOn host = case host of
  "hephaestus" -> 1200
  "majestix"   -> 1080
  "obelix"     -> 1024
  "asterix"    -> 768
  "athena"     -> 1440
borderWidthOn host = case host of
  "hephaestus" -> 3
  "majestix"   -> 3
  "obelix"     -> 3
  "asterix"    -> 3
  "athena"     -> 6
decoHeightOn host = case host of
  "hephaestus" -> 20
  "majestix"   -> 20
  "obelix"     -> 20
  "asterix"    -> 20
  "athena"     -> 30

-------------------------------------------------------------------------------
-- helper for layout name dependent actions

chooseAction :: (String->X()) -> X()
chooseAction f = withWindowSet (f . description . S.layout . S.workspace . S.current)

bindOnLayout :: [(String, X())] -> X()
bindOnLayout bindings = chooseAction chooser where
    chooser ws = case lookup ws bindings of
        Just action -> action
        Nothing -> case lookup "" bindings of
            Just action -> action
            Nothing -> return ()