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|
{-# LANGUAGE ForeignFunctionInterface #-}
-----------------------------------------------------------------------------
-- |
-- Module : Localize
-- Copyright : (C) 2011, 2018 Martin Perner
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Martin Perner <martin@perner.cc>
-- Stability : unstable
-- Portability : unportable
--
-- This module provides an interface to locale information e.g. for DateL
--
-----------------------------------------------------------------------------
module Xmobar.System.Localize
( setupTimeLocale,
getTimeLocale
) where
import Foreign.C
#if ! MIN_VERSION_time(1,5,0)
import qualified System.Locale as L
#else
import qualified Data.Time.Format as L
#endif
#ifdef UTF8
import Codec.Binary.UTF8.String
#endif
-- get localized strings
type NlItem = CInt
#include <langinfo.h>
foreign import ccall unsafe "langinfo.h nl_langinfo"
nl_langinfo :: NlItem -> IO CString
#{enum NlItem,
, AM_STR , PM_STR \
, D_T_FMT , D_FMT , T_FMT , T_FMT_AMPM \
, ABDAY_1, ABDAY_7 \
, DAY_1, DAY_7 \
, ABMON_1, ABMON_12 \
, MON_1, MON_12\
}
getLangInfo :: NlItem -> IO String
getLangInfo item = do
itemStr <- nl_langinfo item
#ifdef UTF8
str <- peekCString itemStr
return $ if isUTF8Encoded str then decodeString str else str
#else
peekCString itemStr
#endif
#include <locale.h>
foreign import ccall unsafe "locale.h setlocale"
setlocale :: CInt -> CString -> IO CString
setupTimeLocale :: String -> IO ()
setupTimeLocale l = withCString l (setlocale #const LC_TIME) >> return ()
getTimeLocale :: IO L.TimeLocale
getTimeLocale = do
-- assumes that the defined values are increasing by exactly one.
-- as they are defined consecutive in an enum this is reasonable
days <- mapM getLangInfo [day1 .. day7]
abdays <- mapM getLangInfo [abday1 .. abday7]
mons <- mapM getLangInfo [mon1 .. mon12]
abmons <- mapM getLangInfo [abmon1 .. abmon12]
amstr <- getLangInfo amStr
pmstr <- getLangInfo pmStr
dtfmt <- getLangInfo dTFmt
dfmt <- getLangInfo dFmt
tfmt <- getLangInfo tFmt
tfmta <- getLangInfo tFmtAmpm
let t = L.defaultTimeLocale {L.wDays = zip days abdays
,L.months = zip mons abmons
,L.amPm = (amstr, pmstr)
,L.dateTimeFmt = dtfmt
,L.dateFmt = dfmt
,L.timeFmt = tfmt
,L.time12Fmt = tfmta}
return t
|
