From 1a72dbf6f2edaaa2efe73df135eb769fa940951e Mon Sep 17 00:00:00 2001
From: bjorn <bjorn@bringert.net>
Date: Thu, 12 Jun 2008 18:19:45 +0000
Subject: [PATCH] Added unmodified GF.Speech.PrJSGF back in.

---
 src-3.0/GF/Speech/PrJSGF.hs | 145 ++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 src-3.0/GF/Speech/PrJSGF.hs

diff --git a/src-3.0/GF/Speech/PrJSGF.hs b/src-3.0/GF/Speech/PrJSGF.hs
new file mode 100644
index 000000000..037a4f4e2
--- /dev/null
+++ b/src-3.0/GF/Speech/PrJSGF.hs
@@ -0,0 +1,145 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : PrJSGF
+-- Maintainer  : BB
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/11/01 20:09:04 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.16 $
+--
+-- This module prints a CFG as a JSGF grammar.
+--
+-- FIXME: remove \/ warn \/ fail if there are int \/ string literal
+-- categories in the grammar
+--
+-- FIXME: convert to UTF-8
+-----------------------------------------------------------------------------
+
+module GF.Speech.PrJSGF (jsgfPrinter) where
+
+import GF.Conversion.Types
+import GF.Data.Utilities
+import GF.Formalism.CFG
+import GF.Formalism.Utilities (Symbol(..), NameProfile(..), Profile(..), filterCats)
+import GF.Infra.Ident
+import GF.Infra.Print
+import GF.Infra.Option
+import GF.Probabilistic.Probabilistic (Probs)
+import GF.Speech.SISR
+import GF.Speech.SRG
+import GF.Speech.RegExp
+import GF.Compile.ShellState (StateGrammar)
+
+import Data.Char
+import Data.List
+import Data.Maybe
+import Text.PrettyPrint.HughesPJ
+import Debug.Trace
+
+width :: Int
+width = 75
+
+jsgfPrinter :: Maybe SISRFormat
+	    -> Options 
+            -> StateGrammar -> String
+jsgfPrinter sisr opts s = renderStyle st $ prJSGF sisr $ makeSimpleSRG opts s
+  where st = style { lineLength = width }
+
+prJSGF :: Maybe SISRFormat -> SRG -> Doc
+prJSGF sisr srg@(SRG{grammarName=name,grammarLanguage=ml,
+                     startCat=start,origStartCat=origStart,rules=rs})
+    = header $++$ mainCat $++$ vcat topCatRules $++$ foldr ($++$) empty (map prRule rs)
+    where
+    header = text "#JSGF" <+> text "V1.0" <+> text "UTF-8" <+> lang <> char ';' $$
+             comment ("JSGF speech recognition grammar for " ++ name) $$
+             comment "Generated by GF" $$
+	     text ("grammar " ++ name ++ ";") 
+    lang = maybe empty text ml
+    mainCat = comment ("Start category: " ++ origStart) $$
+              case cfgCatToGFCat origStart of
+                Just c  -> rule True "MAIN" [prCat (catFormId c)]
+                Nothing -> empty
+    prRule (SRGRule cat origCat rhs) = 
+	comment origCat $$
+        rule False cat (map prAlt rhs)
+--        rule False cat (map prAlt rhs)
+    -- FIXME: use the probability
+    prAlt (SRGAlt mp n rhs) = sep [initTag, p (prItem sisr n rhs), finalTag]
+--    prAlt (SRGAlt mp n rhs) = initTag <+> prItem sisr n rhs <+> finalTag
+      where initTag | isEmpty t = empty
+                    | otherwise = text "<NULL>" <+>  t
+                where t = tag sisr (profileInitSISR n)
+            finalTag = tag sisr (profileFinalSISR n)
+            p = if isEmpty initTag && isEmpty finalTag then id else parens
+
+    topCatRules = [rule True (catFormId tc) (map (it tc) cs) | (tc,cs) <- srgTopCats srg]
+        where it i c = prCat c <+> tag sisr (topCatSISR c)
+
+catFormId :: String -> String
+catFormId = (++ "_cat")
+
+prCat :: SRGCat -> Doc
+prCat c = char '<' <> text c <> char '>'
+
+prItem :: Maybe SISRFormat -> CFTerm -> SRGItem -> Doc
+prItem sisr t = f 0
+  where
+    f _ (REUnion [])  = text "<VOID>"
+    f p (REUnion xs) 
+        | not (null es) = brackets (f 0 (REUnion nes))
+        | otherwise = (if p >= 1 then parens else id) (alts (map (f 1) xs))
+      where (es,nes) = partition isEpsilon xs
+    f _ (REConcat []) = text "<NULL>"
+    f p (REConcat xs) = (if p >= 3 then parens else id) (fsep (map (f 2) xs))
+    f p (RERepeat x)  = f 3 x <> char '*'
+    f _ (RESymbol s)  = prSymbol sisr t s
+
+{-
+prItem :: Maybe SISRFormat -> CFTerm -> [Symbol SRGNT Token] -> Doc
+prItem _ _ [] = text "<NULL>"
+prItem sisr cn ss = paren $ hsep $ map (prSymbol sisr cn) ss
+  where paren = if length ss == 1 then id else parens
+-}
+
+prSymbol :: Maybe SISRFormat -> CFTerm -> Symbol SRGNT Token -> Doc
+prSymbol sisr cn (Cat n@(c,_)) = prCat c <+> tag sisr (catSISR cn n)
+prSymbol _ cn (Tok t) | all isPunct (prt t) = empty  -- removes punctuation
+                      | otherwise = text (prt t) -- FIXME: quote if there is whitespace or odd chars
+
+tag :: Maybe SISRFormat -> (SISRFormat -> SISRTag) -> Doc
+tag Nothing _ = empty
+tag (Just fmt) t = case t fmt of
+                     [] -> empty
+                     ts -> char '{' <+> (text (e $ prSISR ts)) <+> char '}'
+  where e [] = []
+        e ('}':xs) = '\\':'}':e xs
+        e ('\n':xs) = ' ' : e (dropWhile isSpace xs)
+        e (x:xs) = x:e xs
+
+isPunct :: Char -> Bool
+isPunct c = c `elem` "-_.;.,?!"
+
+comment :: String -> Doc
+comment s = text "//" <+> text s
+
+alts :: [Doc] -> Doc
+alts = fsep . prepunctuate (text "| ")
+
+rule :: Bool -> SRGCat -> [Doc] -> Doc
+rule pub c xs = p <+> prCat c <+> char '=' <+> nest 2 (alts xs) <+> char ';'
+  where p = if pub then text "public" else empty
+
+-- Pretty-printing utilities
+
+emptyLine :: Doc
+emptyLine = text ""
+
+prepunctuate :: Doc -> [Doc] -> [Doc]
+prepunctuate _ [] = []
+prepunctuate p (x:xs) = x : map (p <>) xs
+
+($++$) :: Doc -> Doc -> Doc
+x $++$ y = x $$ emptyLine $$ y
+