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path: root/src/XMonad/Custom/Log.hs
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{-# LANGUAGE LambdaCase #-}

-----------------------------------------------------------------------------
-- |
-- Module      :  XMonad.Custom.Log
-- Copyright   :  (c) azahi 2018
-- License     :  BSD3-style (see LICENSE)
--
-- Maintainer  :  azahi <azahi@teknik.io>
-- Stability   :  unstable
-- Portability :  unportable
--
-- Provides configuration for logging to be used
-- with various status display applications
--
-----------------------------------------------------------------------------

module XMonad.Custom.Log
    ( logHook
    ) where

import           System.IO
import           XMonad                             hiding (logHook)
import           XMonad.Actions.CopyWindow
import           XMonad.Custom.Theme
import           XMonad.Hooks.CurrentWorkspaceOnTop
import           XMonad.Hooks.DynamicLog
import           XMonad.Hooks.EwmhDesktops
import           XMonad.Util.NamedScratchpad
import           XMonad.Util.SpawnNamedPipe
import           XMonad.Util.WorkspaceCompare

xmobarFont :: Int -> String -> String
xmobarFont f = wrap (concat ["<fn=", show f, ">"]) "</fn>"

topBarPP :: PP
topBarPP = def
    { ppCurrent         = xmobarColor white2 "" . xmobarFont 2 . wrap "=" "="
    , ppVisible         = xmobarColor white1 ""                . wrap "~" "~"
    , ppHidden          = xmobarColor white1 ""                . wrap "-" "-"
    , ppHiddenNoWindows = xmobarColor white1 ""                . wrap "_" "_"
    , ppUrgent          = xmobarColor red2   ""                . wrap "!" "!"
    , ppSep             = " / "
    , ppWsSep           = " "
    , ppTitle           = xmobarColor white1 "" . shorten 50
    , ppTitleSanitize   = xmobarStrip
    , ppLayout          = xmobarColor white1 ""
    , ppOrder           = id
    , ppSort            = (namedScratchpadFilterOutWorkspace .) <$> getSortByIndex
    , ppExtras          = []
    }

botBarPP :: PP
botBarPP = topBarPP
    { ppCurrent         = const ""
    , ppVisible         = const ""
    , ppHidden          = const ""
    , ppHiddenNoWindows = const ""
    , ppUrgent          = const ""
    , ppTitle           = const ""
    , ppLayout          = const ""
    }

safePrintToPipe :: Maybe Handle -> String -> IO ()
safePrintToPipe = maybe (\_ -> return ()) hPutStrLn

logHook :: X ()
logHook = do
    currentWorkspaceOnTop
    ewmhDesktopsLogHook
    t <- getNamedPipe "xmobarTop"
    b <- getNamedPipe "xmobarBot"
    c <- wsContainingCopies
    let copiesCurrent ws | ws `elem` c = xmobarColor yellow2 "" . xmobarFont 2 . wrap "*" "=" $ ws
                         | otherwise   = xmobarColor white2  "" . xmobarFont 2 . wrap "=" "=" $ ws
    let copiesHidden  ws | ws `elem` c = xmobarColor yellow1 ""                . wrap "*" "-" $ ws
                         | otherwise   = xmobarColor white1  ""                . wrap "-" "-" $ ws
    let copiesUrgent  ws | ws `elem` c = xmobarColor yellow2 ""                . wrap "*" "!" $ ws
                         | otherwise   = xmobarColor white2  ""                . wrap "!" "!" $ ws
    dynamicLogWithPP $ topBarPP
        { ppCurrent = copiesCurrent
        , ppHidden  = copiesHidden
        , ppUrgent  = copiesUrgent
        , ppOutput  = safePrintToPipe t
        }
    dynamicLogWithPP $ botBarPP
        { ppOutput  = safePrintToPipe b
        }

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