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|
------------------------------------------------------------------------------
-- |
-- Module: Xmobar.Config.Defaults
-- Copyright: (c) 2018, 2019, 2020 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: portable
-- Created: Sun Nov 25, 2018 22:26
--
--
-- Default values for Xmobar configurations and functions to access
-- configuration files and directories.
--
------------------------------------------------------------------------------
module Xmobar.App.Config (defaultConfig,
xmobarDataDir,
xmobarConfigFile) where
import Control.Monad (when, filterM)
import Data.Functor ((<&>))
import System.Environment
import System.Directory
import System.FilePath ((</>))
import System.Posix.Files (fileExist)
import Xmobar.Plugins.Date
import Xmobar.Plugins.StdinReader
import Xmobar.Config.Types
import Xmobar.Run.Runnable
-- | The default configuration values
defaultConfig :: Config
defaultConfig =
Config { font = "-misc-fixed-*-*-*-*-10-*-*-*-*-*-*-*"
, additionalFonts = []
, wmClass = "xmobar"
, wmName = "xmobar"
, bgColor = "#000000"
, fgColor = "#BFBFBF"
, alpha = 255
, position = Top
, border = NoBorder
, borderColor = "#BFBFBF"
, borderWidth = 1
, textOffset = -1
, iconOffset = -1
, textOffsets = []
, hideOnStart = False
, lowerOnStart = True
, persistent = False
, allDesktops = True
, overrideRedirect = True
, pickBroadest = False
, iconRoot = "."
, commands = [ Run $ Date "%a %b %_d %Y * %H:%M:%S" "theDate" 10
, Run StdinReader]
, sepChar = "%"
, alignSep = "}{"
, template = "%StdinReader% }{ " ++
"<fc=#00FF00>%uname%</fc> * <fc=#FF0000>%theDate%</fc>"
, verbose = False
}
-- | Return the path to the xmobar data directory. This directory is
-- used by Xmobar to store data files such as the run-time state file
-- and the configuration binary generated by GHC.
--
-- Several directories are considered. In order of preference:
--
-- 1. The directory specified in the @XMOBAR_DATA_DIR@ environment variable.
-- 2. The @XDG_DATA_HOME/xmobar@ directory.
-- 3. The @~\/.xmobar@ directory.
--
-- The first directory that exists will be used. If none of the
-- directories exist then (1) will be used if it is set, otherwise (2)
-- will be used. Either way, a directory will be created if
-- necessary.
xmobarDataDir :: IO String
xmobarDataDir =
findFirstDirWithEnv True "XMOBAR_DATA_DIR"
[ getXdgDirectory XdgData "xmobar"
, getAppUserDataDirectory "xmobar"
]
-- | Helper function that will find the first existing directory and
-- return its path. If none of the directories can be found,
-- optionally create and return the first from the list. If the list
-- is empty this function returns the historical @~\/.xmobar@
-- directory.
findFirstDirOf :: Bool -> [IO FilePath] -> IO FilePath
findFirstDirOf create [] = findFirstDirOf create [getAppUserDataDirectory "xmobar"]
findFirstDirOf create possibles = do
found <- go possibles
case found of
Just path -> return path
Nothing -> do
primary <- head possibles
when create (createDirectoryIfMissing True primary)
return primary
where
go [] = return Nothing
go (x:xs) = do
exists <- x >>= doesDirectoryExist
if exists then x <&> Just else go xs
-- | Simple wrapper around @findFirstDirOf@ that allows the primary
-- path to be specified by an environment variable.
findFirstDirWithEnv :: Bool -> String -> [IO FilePath] -> IO FilePath
findFirstDirWithEnv create envName paths = do
envPath' <- lookupEnv envName
case envPath' of
Nothing -> findFirstDirOf create paths
Just envPath -> findFirstDirOf create (return envPath:paths)
xmobarInConfigDirs :: FilePath -> IO (Maybe FilePath)
xmobarInConfigDirs fn = do
env <- lookupEnv "XMOBAR_CONFIG_DIR"
xdg <- getXdgDirectory XdgConfig "xmobar"
app <- getAppUserDataDirectory "xmobar"
hom <- getHomeDirectory
let candidates = case env of
Nothing -> [app, xdg, hom]
Just p -> [p, app, xdg, hom]
fs <- filterM (\d -> fileExist (d </> fn)) candidates
return $ if null fs then Nothing else Just (head fs </> fn)
xmobarConfigFile :: IO (Maybe FilePath)
xmobarConfigFile =
fmap ffirst $ mapM xmobarInConfigDirs ["xmobar.hs", ".xmobarrc", "xmobarrc"]
where ffirst [] = Nothing
ffirst (Nothing:fs) = ffirst fs
ffirst (p:_) = p
|
