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50 lines
1.5 KiB
Haskell
50 lines
1.5 KiB
Haskell
----------------------------------------------------------------------
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-- |
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-- Module : Unlex
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-- Maintainer : AR
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-- Stability : (stable)
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-- Portability : (portable)
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--
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-- > CVS $Date: 2005/04/21 16:21:32 $
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-- > CVS $Author: bringert $
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-- > CVS $Revision: 1.8 $
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--
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-- elementary text postprocessing. AR 21/11/2001
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-----------------------------------------------------------------------------
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module GF.Canon.Unlex (formatAsText, unlex, performBinds) where
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import GF.Data.Operations
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import GF.Data.Str
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import Data.Char
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import Data.List (isPrefixOf)
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formatAsText :: String -> String
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formatAsText = unwords . format . cap . words where
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format ws = case ws of
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w : c : ww | major c -> (w ++ c) : format (cap ww)
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w : c : ww | minor c -> (w ++ c) : format ww
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c : ww | para c -> "\n\n" : format ww
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w : ww -> w : format ww
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[] -> []
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cap (p:(c:cs):ww) | para p = p : (toUpper c : cs) : ww
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cap ((c:cs):ww) = (toUpper c : cs) : ww
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cap [] = []
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major = flip elem (map (:[]) ".!?")
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minor = flip elem (map (:[]) ",:;")
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para = (=="&-")
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unlex :: [Str] -> String
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unlex = formatAsText . performBinds . concat . map sstr . take 1 ----
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-- | modified from GF/src/Text by adding hyphen
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performBinds :: String -> String
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performBinds = unwords . format . words where
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format ws = case ws of
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w : "-" : u : ws -> format ((w ++ "-" ++ u) : ws)
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w : "&+" : u : ws -> format ((w ++ u) : ws)
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w : ws -> w : format ws
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[] -> []
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