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Added unmodified GF.Speech.PrJSGF back in.
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bjorn
145
src-3.0/GF/Speech/PrJSGF.hs
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145
src-3.0/GF/Speech/PrJSGF.hs
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----------------------------------------------------------------------
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-- |
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-- Module : PrJSGF
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-- Maintainer : BB
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-- Stability : (stable)
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-- Portability : (portable)
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--
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-- > CVS $Date: 2005/11/01 20:09:04 $
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-- > CVS $Author: bringert $
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-- > CVS $Revision: 1.16 $
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--
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-- This module prints a CFG as a JSGF grammar.
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--
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-- FIXME: remove \/ warn \/ fail if there are int \/ string literal
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-- categories in the grammar
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--
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-- FIXME: convert to UTF-8
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-----------------------------------------------------------------------------
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module GF.Speech.PrJSGF (jsgfPrinter) where
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import GF.Conversion.Types
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import GF.Data.Utilities
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import GF.Formalism.CFG
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import GF.Formalism.Utilities (Symbol(..), NameProfile(..), Profile(..), filterCats)
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import GF.Infra.Ident
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import GF.Infra.Print
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import GF.Infra.Option
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import GF.Probabilistic.Probabilistic (Probs)
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import GF.Speech.SISR
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import GF.Speech.SRG
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import GF.Speech.RegExp
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import GF.Compile.ShellState (StateGrammar)
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import Data.Char
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import Data.List
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import Data.Maybe
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import Text.PrettyPrint.HughesPJ
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import Debug.Trace
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width :: Int
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width = 75
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jsgfPrinter :: Maybe SISRFormat
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-> Options
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-> StateGrammar -> String
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jsgfPrinter sisr opts s = renderStyle st $ prJSGF sisr $ makeSimpleSRG opts s
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where st = style { lineLength = width }
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prJSGF :: Maybe SISRFormat -> SRG -> Doc
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prJSGF sisr srg@(SRG{grammarName=name,grammarLanguage=ml,
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startCat=start,origStartCat=origStart,rules=rs})
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= header $++$ mainCat $++$ vcat topCatRules $++$ foldr ($++$) empty (map prRule rs)
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where
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header = text "#JSGF" <+> text "V1.0" <+> text "UTF-8" <+> lang <> char ';' $$
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comment ("JSGF speech recognition grammar for " ++ name) $$
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comment "Generated by GF" $$
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text ("grammar " ++ name ++ ";")
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lang = maybe empty text ml
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mainCat = comment ("Start category: " ++ origStart) $$
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case cfgCatToGFCat origStart of
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Just c -> rule True "MAIN" [prCat (catFormId c)]
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Nothing -> empty
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prRule (SRGRule cat origCat rhs) =
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comment origCat $$
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rule False cat (map prAlt rhs)
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-- rule False cat (map prAlt rhs)
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-- FIXME: use the probability
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prAlt (SRGAlt mp n rhs) = sep [initTag, p (prItem sisr n rhs), finalTag]
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-- prAlt (SRGAlt mp n rhs) = initTag <+> prItem sisr n rhs <+> finalTag
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where initTag | isEmpty t = empty
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| otherwise = text "<NULL>" <+> t
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where t = tag sisr (profileInitSISR n)
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finalTag = tag sisr (profileFinalSISR n)
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p = if isEmpty initTag && isEmpty finalTag then id else parens
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topCatRules = [rule True (catFormId tc) (map (it tc) cs) | (tc,cs) <- srgTopCats srg]
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where it i c = prCat c <+> tag sisr (topCatSISR c)
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catFormId :: String -> String
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catFormId = (++ "_cat")
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prCat :: SRGCat -> Doc
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prCat c = char '<' <> text c <> char '>'
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prItem :: Maybe SISRFormat -> CFTerm -> SRGItem -> Doc
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prItem sisr t = f 0
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where
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f _ (REUnion []) = text "<VOID>"
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f p (REUnion xs)
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| not (null es) = brackets (f 0 (REUnion nes))
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| otherwise = (if p >= 1 then parens else id) (alts (map (f 1) xs))
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where (es,nes) = partition isEpsilon xs
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f _ (REConcat []) = text "<NULL>"
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f p (REConcat xs) = (if p >= 3 then parens else id) (fsep (map (f 2) xs))
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f p (RERepeat x) = f 3 x <> char '*'
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f _ (RESymbol s) = prSymbol sisr t s
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{-
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prItem :: Maybe SISRFormat -> CFTerm -> [Symbol SRGNT Token] -> Doc
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prItem _ _ [] = text "<NULL>"
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prItem sisr cn ss = paren $ hsep $ map (prSymbol sisr cn) ss
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where paren = if length ss == 1 then id else parens
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-}
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prSymbol :: Maybe SISRFormat -> CFTerm -> Symbol SRGNT Token -> Doc
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prSymbol sisr cn (Cat n@(c,_)) = prCat c <+> tag sisr (catSISR cn n)
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prSymbol _ cn (Tok t) | all isPunct (prt t) = empty -- removes punctuation
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| otherwise = text (prt t) -- FIXME: quote if there is whitespace or odd chars
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tag :: Maybe SISRFormat -> (SISRFormat -> SISRTag) -> Doc
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tag Nothing _ = empty
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tag (Just fmt) t = case t fmt of
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[] -> empty
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ts -> char '{' <+> (text (e $ prSISR ts)) <+> char '}'
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where e [] = []
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e ('}':xs) = '\\':'}':e xs
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e ('\n':xs) = ' ' : e (dropWhile isSpace xs)
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e (x:xs) = x:e xs
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isPunct :: Char -> Bool
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isPunct c = c `elem` "-_.;.,?!"
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comment :: String -> Doc
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comment s = text "//" <+> text s
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alts :: [Doc] -> Doc
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alts = fsep . prepunctuate (text "| ")
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rule :: Bool -> SRGCat -> [Doc] -> Doc
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rule pub c xs = p <+> prCat c <+> char '=' <+> nest 2 (alts xs) <+> char ';'
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where p = if pub then text "public" else empty
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-- Pretty-printing utilities
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emptyLine :: Doc
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emptyLine = text ""
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prepunctuate :: Doc -> [Doc] -> [Doc]
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prepunctuate _ [] = []
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prepunctuate p (x:xs) = x : map (p <>) xs
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($++$) :: Doc -> Doc -> Doc
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x $++$ y = x $$ emptyLine $$ y
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