forked from GitHub/gf-core
788 lines
30 KiB
Haskell
788 lines
30 KiB
Haskell
{-# LANGUAGE CPP #-}
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module PGFService(cgiMain,cgiMain',getPath,
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logFile,stderrToFile,
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newPGFCache,flushPGFCache) where
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import PGF (PGF)
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import qualified PGF
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import PGF.Lexing
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import Cache
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import FastCGIUtils
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import URLEncoding
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#if C_RUNTIME
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import qualified PGF2 as C
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import Data.Time.Clock(UTCTime,getCurrentTime,diffUTCTime)
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#endif
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import Network.CGI
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import Text.JSON
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import Text.PrettyPrint as PP(render, text, (<+>))
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import qualified Codec.Binary.UTF8.String as UTF8 (decodeString)
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import qualified Data.ByteString.Lazy as BS
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import Control.Concurrent
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import qualified Control.Exception as E
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import Control.Monad
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import Control.Monad.State(State,evalState,get,put)
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import Data.Char
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import Data.Function (on)
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import Data.List (sortBy,intersperse,mapAccumL,nub,isSuffixOf)
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import qualified Data.Map as Map
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import Data.Maybe
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import System.Random
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import System.Process
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import System.Exit
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import System.IO
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import System.Directory(removeFile)
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import System.Mem(performGC)
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import Fold(fold) -- transfer function for OpenMath LaTeX
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catchIOE :: IO a -> (E.IOException -> IO a) -> IO a
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catchIOE = E.catch
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logFile :: FilePath
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logFile = "pgf-error.log"
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#ifdef C_RUNTIME
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type Caches = (Cache PGF,Cache (C.PGF,MVar ParseCache))
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type ParseCache = Map.Map (String,String) (ParseResult,UTCTime)
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type ParseResult = Either String [(C.Expr,Float)]
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newPGFCache = do pgfCache <- newCache PGF.readPGF
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cCache <- newCache $ \ path -> do pgf <- C.readPGF path
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pc <- newMVar Map.empty
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return (pgf,pc)
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return (pgfCache,cCache)
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flushPGFCache (c1,c2) = flushCache c1 >> flushCache c2
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#else
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type Caches = (Cache PGF,())
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newPGFCache = do pgfCache <- newCache PGF.readPGF
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return (pgfCache,())
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flushPGFCache (c1,_) = flushCache c1
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#endif
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getPath =
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do path <- getVarWithDefault "PATH_TRANSLATED" "" -- apache mod_fastcgi
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if null path
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then getVarWithDefault "SCRIPT_FILENAME" "" -- lighttpd
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else return path
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cgiMain :: Caches -> CGI CGIResult
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cgiMain cache = handleErrors . handleCGIErrors $
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cgiMain' cache =<< getPath
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cgiMain' :: Caches -> FilePath -> CGI CGIResult
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cgiMain' cache path =
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do command <- liftM (maybe "grammar" (urlDecodeUnicode . UTF8.decodeString))
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(getInput "command")
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case command of
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"download" -> outputBinary =<< liftIO (BS.readFile path)
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#ifdef C_RUNTIME
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'c':'-':_ -> cpgfMain command =<< liftIO (readCache (snd cache) path)
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#endif
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_ -> pgfMain command =<< liftIO (readCache (fst cache) path)
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--------------------------------------------------------------------------------
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-- * C run-time functionality
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#ifdef C_RUNTIME
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cpgfMain :: String -> (C.PGF,MVar ParseCache) -> CGI CGIResult
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cpgfMain command (pgf,pc) =
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case command of
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"c-parse" -> out =<< join (parse#lexer%input%from%start%limit%trie)
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"c-linearize" -> out =<< lin # tree % to
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"c-translate" -> out =<< join (trans#lexer%input%from%to%start%limit%trie)
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"c-flush" -> out =<< flush
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"c-grammar" -> out grammar
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_ -> badRequest "Unknown command" command
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where
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flush = liftIO $ do modifyMVar_ pc $ const $ return Map.empty
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performGC
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return $ showJSON ()
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grammar = showJSON $ makeObj
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["name".=C.abstractName pgf,
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"startcat".=C.startCat pgf,
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"languages".=languages]
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where
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languages = [makeObj ["name".= l] | (l,_)<-Map.toList (C.languages pgf)]
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parse lexer input (from,concr) start mlimit trie =
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do r <- parse' (lexer input) (from,concr) start mlimit
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return $ showJSON [makeObj ("from".=from:jsonParseResult r)]
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jsonParseResult = either bad good
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where
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bad err = ["parseFailed".=err]
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good trees = "trees".=map tp trees :[] -- :addTrie trie trees
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tp (tree,prob) = makeObj ["tree".=tree,"prob".=prob]
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parse' input (from,concr) start mlimit =
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liftIO $ do t <- getCurrentTime
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fmap (maybe id take mlimit . drop start)
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# modifyMVar pc (parse'' t)
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where
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key = (from,input)
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parse'' t pc = maybe new old $ Map.lookup key pc
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where
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new = return (update (res,t) pc,res)
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where res = C.parse concr (C.startCat pgf) input
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old (res,_) = return (update (res,t) pc,res)
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update r = Map.mapMaybe purge . Map.insert key r
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purge r@(_,t') = if diffUTCTime t t'<120 then Just r else Nothing
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-- remove unused parse results after 2 minutes
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lin tree tos = showJSON (lin' tree tos)
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lin' tree tos = [makeObj ["to".=to,"text".=C.linearize c tree]|(to,c)<-tos]
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trans lexer input (from,concr) tos start mlimit trie =
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do parses <- parse' (lexer input) (from,concr) start mlimit
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return $
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showJSON [ makeObj ["from".=from,
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"translations".= jsonParses parses]]
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where
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jsonParses = either bad good
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where
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bad err = [makeObj ["error".=err]]
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good parses = [makeObj ["tree".=tree,
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"prob".=prob,
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"linearizations".=lin' tree tos]
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| (tree,prob) <- parses]
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from = maybe (missing "from") return =<< getLang "from"
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to = getLangs "to"
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getLangs = getLangs' readLang
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getLang = getLang' readLang
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readLang :: String -> CGI (String,C.Concr)
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readLang lang =
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case Map.lookup lang (C.languages pgf) of
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Nothing -> badRequest "Bad language" lang
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Just c -> return (lang,c)
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tree = do s <- maybe (missing "tree") return =<< getInput1 "tree"
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let t = C.readExpr s
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maybe (badRequest "bad tree" s) return t
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{-
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instance JSON C.CId where
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readJSON x = readJSON x >>= maybe (fail "Bad language.") return . C.readCId
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showJSON = showJSON . C.showCId
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-}
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instance JSON C.Expr where
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readJSON x = readJSON x >>= maybe (fail "Bad expression.") return . C.readExpr
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showJSON = showJSON . C.showExpr
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#endif
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lexer = maybe (return id) lexerfun =<< getInput "lexer"
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where
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lexerfun name =
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case name of
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"text" -> return (unwords . lexText)
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"code" -> return (unwords . lexCode)
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"mixed" -> return (unwords . lexMixed)
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_ -> throwCGIError 400 "Unknown lexer" ["Unknown lexer: "++name]
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--------------------------------------------------------------------------------
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-- * Haskell run-time functionality
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pgfMain :: String -> PGF -> CGI CGIResult
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pgfMain command pgf =
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case command of
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"parse" -> out =<< parse#lexer%input%cat%from%limit%trie
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"complete" -> out =<< doComplete pgf # input % cat % from % limit
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"linearize" -> out =<< doLinearize pgf # tree % to
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"linearizeAll" -> out =<< doLinearizes pgf # tree % to
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"linearizeTable" -> out =<< doLinearizeTabular pgf # tree % to
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"random" -> cat >>= \c -> depth >>= \dp -> limit >>= \l -> to >>= \to -> liftIO (doRandom pgf c dp l to) >>= out
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"generate" -> out =<< doGenerate pgf # cat % depth % limit % to
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"translate" -> out =<< trans#lexer%input%cat%from%to%limit%trie
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"translategroup" -> out =<< transgroup#lexer%input%cat%from%to%limit
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"grammar" -> out =<< doGrammar pgf # requestAcceptLanguage
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"abstrtree" -> outputGraphviz =<< abstrTree pgf # graphvizOptions % tree
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"alignment" -> outputGraphviz =<< alignment pgf # tree % to
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"parsetree" -> do t <- tree
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Just l <- from
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opts <- graphvizOptions
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outputGraphviz (parseTree pgf l opts t)
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"abstrjson" -> out . jsonExpr =<< tree
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"browse" -> join $ doBrowse pgf # optId % cssClass % href % format "html" % getIncludePrintNames
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"external" -> do cmd <- getInput "external"
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doExternal cmd =<< input
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_ -> throwCGIError 400 "Unknown command" ["Unknown command: " ++ show command]
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where
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parse lexer input = doParse pgf (lexer input)
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trans lexer input = doTranslate pgf (lexer input)
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transgroup lexer input = doTranslateGroup pgf (lexer input)
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tree :: CGI PGF.Tree
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tree = do ms <- getInput "tree"
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s <- maybe (throwCGIError 400 "No tree given" ["No tree given"]) return ms
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t <- maybe (throwCGIError 400 "Bad tree" ["tree: " ++ s]) return (PGF.readExpr s)
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t <- either (\err -> throwCGIError 400 "Type incorrect tree"
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["tree: " ++ PGF.showExpr [] t
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,render (PP.text "error:" <+> PGF.ppTcError err)
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])
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(return . fst)
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(PGF.inferExpr pgf t)
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return t
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cat :: CGI (Maybe PGF.Type)
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cat =
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do mcat <- getInput1 "cat"
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case mcat of
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Nothing -> return Nothing
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Just cat -> case PGF.readType cat of
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Nothing -> throwCGIError 400 "Bad category" ["Bad category: " ++ cat]
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Just typ -> return $ Just typ -- typecheck the category
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optId :: CGI (Maybe PGF.CId)
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optId = maybe (return Nothing) rd =<< getInput "id"
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where
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rd = maybe err (return . Just) . PGF.readCId
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err = throwCGIError 400 "Bad identifier" []
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cssClass, href :: CGI (Maybe String)
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cssClass = getInput "css-class"
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href = getInput "href"
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getIncludePrintNames :: CGI Bool
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getIncludePrintNames = maybe False (const True) # getInput "printnames"
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graphvizOptions =
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PGF.GraphvizOptions # bool "noleaves"
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% bool "nofun"
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% bool "nocat"
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% string "nodefont"
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% string "leaffont"
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% string "nodecolor"
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% string "leafcolor"
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% string "nodeedgestyle"
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% string "leafedgestyle"
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where
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string name = maybe "" id # getInput name
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bool name = maybe False toBool # getInput name
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from = getLang "from"
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to = getLangs "to"
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getLangs = getLangs' readLang
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getLang = getLang' readLang
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readLang :: String -> CGI PGF.Language
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readLang l =
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case PGF.readLanguage l of
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Nothing -> throwCGIError 400 "Bad language" ["Bad language: " ++ l]
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Just lang | lang `elem` PGF.languages pgf -> return lang
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| otherwise -> throwCGIError 400 "Unknown language" ["Unknown language: " ++ l]
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-- * Request parameter access and related auxiliary functions
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out = outputJSONP
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getInput1 x = nonEmpty # getInput x
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nonEmpty (Just "") = Nothing
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nonEmpty r = r
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input :: CGI String
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input = liftM (maybe "" (urlDecodeUnicode . UTF8.decodeString)) $ getInput "input"
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getLangs' readLang i = mapM readLang . maybe [] words =<< getInput i
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getLang' readLang i =
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do mlang <- getInput i
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case mlang of
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Just l@(_:_) -> Just # readLang l
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_ -> return Nothing
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limit, depth :: CGI (Maybe Int)
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limit = readInput "limit"
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depth = readInput "depth"
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start :: CGI Int
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start = maybe 0 id # readInput "start"
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trie :: CGI Bool
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trie = maybe False toBool # getInput "trie"
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toBool s = s `elem` ["","yes","true","True"]
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missing = badRequest "Missing parameter"
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errorMissingId = badRequest "Missing identifier" ""
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badRequest msg extra =
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throwCGIError 400 msg [msg ++(if null extra then "" else ": "++extra)]
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format def = maybe def id # getInput "format"
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-- * Request implementations
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-- Hook for simple extensions of the PGF service
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doExternal Nothing input = throwCGIError 400 "Unknown external command" ["Unknown external command"]
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doExternal (Just cmd) input =
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do liftIO $ logError ("External command: "++cmd)
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cmds <- liftIO $ (fmap lines $ readFile "external_services")
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`catchIOE` const (return [])
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liftIO $ logError ("External services: "++show cmds)
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if cmd `elem` cmds then ok else err
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where
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err = throwCGIError 400 "Unknown external command" ["Unknown external command: "++cmd]
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ok =
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do let tmpfile1 = "external_input.txt"
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tmpfile2 = "external_output.txt"
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liftIO $ writeFile "external_input.txt" input
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liftIO $ system $ cmd ++ " " ++ tmpfile1 ++ " > " ++ tmpfile2
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liftIO $ removeFile tmpfile1
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r <- outputJSONP =<< liftIO (readFile tmpfile2)
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liftIO $ removeFile tmpfile2
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return r
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doTranslate :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> [PGF.Language] -> Maybe Int -> Bool -> JSValue
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doTranslate pgf input mcat mfrom tos mlimit trie =
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showJSON
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[makeObj ("from".=from : "brackets".=bs : jsonTranslateOutput po)
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| (from,po,bs) <- parse' pgf input mcat mfrom]
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where
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jsonTranslateOutput output =
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case output of
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PGF.ParseOk trees ->
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addTrie trie trees++
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["translations".=
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[makeObj ["tree".=tree,
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"linearizations".=
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[makeObj ["to".=to, "text".=text, "brackets".=bs]
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| (to,text,bs)<- linearizeAndBind pgf tos tree]]
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| tree <- maybe id take mlimit trees]]
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PGF.ParseIncomplete -> ["incomplete".=True]
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PGF.ParseFailed n -> ["parseFailed".=n]
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PGF.TypeError errs -> jsonTypeErrors errs
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jsonTypeErrors errs =
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["typeErrors".= [makeObj ["fid".=fid, "msg".=show (PGF.ppTcError err)]
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| (fid,err) <- errs]]
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-- used in phrasebook
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doTranslateGroup :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> [PGF.Language] -> Maybe Int -> JSValue
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doTranslateGroup pgf input mcat mfrom tos mlimit =
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showJSON
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[makeObj ["from".=langOnly (PGF.showLanguage from),
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"to".=langOnly (PGF.showLanguage to),
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"linearizations".=
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[toJSObject (("text", doText alt) : disamb lg from ts)
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| (ts,alt) <- output, let lg = length output]
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]
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(from,po,bs) <- parse' pgf input mcat mfrom,
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(to,output) <- groupResults [(t, linearizeAndBind pgf tos t) | t <- case po of {PGF.ParseOk ts -> maybe id take mlimit ts; _ -> []}]
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]
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where
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groupResults = Map.toList . foldr more Map.empty . start . collect
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where
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collect tls = [(t,(l,s)) | (t,ls) <- tls, (l,s,_) <- ls, notDisamb l]
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start ls = [(l,[([t],s)]) | (t,(l,s)) <- ls]
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more (l,s) = Map.insertWith (\ [([t],x)] xs -> insertAlt t x xs) l s
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insertAlt t x xs = case xs of
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(ts,y):xs2 -> if x==y then (t:ts,y):xs2 -- if string is there add only tree
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else (ts,y) : insertAlt t x xs2
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_ -> [([t],x)]
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doText s = case s of
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c:cs | elem (last s) ".?!" -> toUpper c : init (init cs) ++ [last s]
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_ -> s
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langOnly = reverse . take 3 . reverse
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disamb lg from ts =
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if lg < 2
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then []
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else [("tree", "-- " ++ groupDisambs [doText (disambLang from t) | t <- ts])]
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groupDisambs = unwords . intersperse "/"
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disambLang f t =
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let
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disfl lang = PGF.mkCId ("Disamb" ++ lang)
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disf = disfl (PGF.showLanguage f)
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disfEng = disfl (reverse (drop 3 (reverse (PGF.showLanguage f))) ++ "Eng")
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in
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if elem disf (PGF.languages pgf) -- if Disamb f exists use it
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then PGF.linearize pgf disf t
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else if elem disfEng (PGF.languages pgf) -- else try DisambEng
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then PGF.linearize pgf disfEng t
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else "AST " ++ PGF.showExpr [] t -- else show abstract tree
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notDisamb = (/="Disamb") . take 6 . PGF.showLanguage
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doParse :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> Maybe Int -> Bool -> JSValue
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doParse pgf input mcat mfrom mlimit trie = showJSON $ map makeObj
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["from".=from : "brackets".=bs : jsonParseOutput po
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| (from,po,bs) <- parse' pgf input mcat mfrom]
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where
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jsonParseOutput output =
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case output of
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PGF.ParseOk trees -> ["trees".=maybe id take mlimit trees]
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++addTrie trie trees
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PGF.TypeError errs -> jsonTypeErrors errs
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PGF.ParseIncomplete -> ["incomplete".=True]
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PGF.ParseFailed n -> ["parseFailed".=n]
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addTrie trie trees =
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["trie".=map head (PGF.toTrie (map PGF.toATree trees))|trie]
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doComplete :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> Maybe Int -> JSValue
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doComplete pgf input mcat mfrom mlimit = showJSON
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[makeObj ["from".=from, "brackets".=bs, "completions".=cs, "text".=s]
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| from <- froms, let (bs,s,cs) = complete' pgf from cat mlimit input]
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where
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froms = maybe (PGF.languages pgf) (:[]) mfrom
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cat = fromMaybe (PGF.startCat pgf) mcat
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doLinearize :: PGF -> PGF.Tree -> [PGF.Language] -> JSValue
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doLinearize pgf tree tos = showJSON
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[makeObj ["to".=to, "text".=text,"brackets".=bs]
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| (to,text,bs) <- linearizeAndBind pgf tos tree]
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doLinearizes :: PGF -> PGF.Tree -> [PGF.Language] -> JSValue
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doLinearizes pgf tree tos = showJSON
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[makeObj ["to".=to, "texts".=map doBind texts]
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| (to,texts) <- linearizes' pgf tos tree]
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where
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linearizes' pgf tos tree =
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[(to,lins to (transfer to tree)) | to <- langs]
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where
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langs = if null tos then PGF.languages pgf else tos
|
|
lins to = nub . concatMap (map snd) . PGF.tabularLinearizes pgf to
|
|
|
|
doLinearizeTabular :: PGF -> PGF.Tree -> [PGF.Language] -> JSValue
|
|
doLinearizeTabular pgf tree tos = showJSON
|
|
[makeObj ["to".=to,
|
|
"table".=[makeObj ["params".=ps,"texts".=ts] | (ps,ts)<-texts]]
|
|
| (to,texts) <- linearizeTabular pgf tos tree]
|
|
|
|
doRandom :: PGF -> Maybe PGF.Type -> Maybe Int -> Maybe Int -> [PGF.Language] -> IO JSValue
|
|
doRandom pgf mcat mdepth mlimit tos =
|
|
do g <- newStdGen
|
|
let trees = PGF.generateRandomDepth g pgf cat (Just depth)
|
|
return $ showJSON
|
|
[makeObj ["tree".=PGF.showExpr [] tree,
|
|
"linearizations".= doLinearizes pgf tree tos]
|
|
| tree <- limit trees]
|
|
where cat = fromMaybe (PGF.startCat pgf) mcat
|
|
limit = take (fromMaybe 1 mlimit)
|
|
depth = fromMaybe 4 mdepth
|
|
|
|
doGenerate :: PGF -> Maybe PGF.Type -> Maybe Int -> Maybe Int -> [PGF.Language] -> JSValue
|
|
doGenerate pgf mcat mdepth mlimit tos =
|
|
showJSON [makeObj ["tree".=PGF.showExpr [] tree,
|
|
"linearizations".=
|
|
[makeObj ["to".=to, "text".=text]
|
|
| (to,text,bs) <- linearizeAndBind pgf tos tree]]
|
|
| tree <- limit trees]
|
|
where
|
|
trees = PGF.generateAllDepth pgf cat (Just depth)
|
|
cat = fromMaybe (PGF.startCat pgf) mcat
|
|
limit = take (fromMaybe 1 mlimit)
|
|
depth = fromMaybe 4 mdepth
|
|
|
|
doGrammar :: PGF -> Maybe (Accept Language) -> JSValue
|
|
doGrammar pgf macc = showJSON $ makeObj
|
|
["name".=PGF.abstractName pgf,
|
|
"userLanguage".=selectLanguage pgf macc,
|
|
"startcat".=PGF.showType [] (PGF.startCat pgf),
|
|
"categories".=categories,
|
|
"functions".=functions,
|
|
"languages".=languages]
|
|
where
|
|
languages =
|
|
[makeObj ["name".= l,
|
|
"languageCode".= fromMaybe "" (PGF.languageCode pgf l)]
|
|
| l <- PGF.languages pgf]
|
|
categories = [PGF.showCId cat | cat <- PGF.categories pgf]
|
|
functions = [PGF.showCId fun | fun <- PGF.functions pgf]
|
|
|
|
outputGraphviz code =
|
|
do fmt <- format "png"
|
|
case fmt of
|
|
"gv" -> outputPlain code
|
|
_ -> outputFPS' fmt =<< liftIO (pipeIt2graphviz fmt code)
|
|
where
|
|
outputFPS' fmt bs =
|
|
do setHeader "Content-Type" (mimeType fmt)
|
|
outputFPS bs
|
|
|
|
mimeType fmt =
|
|
case fmt of
|
|
"png" -> "image/png"
|
|
"gif" -> "image/gif"
|
|
"svg" -> "image/svg+xml"
|
|
-- ...
|
|
_ -> "application/binary"
|
|
|
|
abstrTree pgf opts tree = PGF.graphvizAbstractTree pgf opts' tree
|
|
where opts' = (not (PGF.noFun opts),not (PGF.noCat opts))
|
|
|
|
parseTree pgf lang opts tree = PGF.graphvizParseTree pgf lang opts tree
|
|
|
|
alignment pgf tree tos = PGF.graphvizAlignment pgf tos' tree
|
|
where tos' = if null tos then PGF.languages pgf else tos
|
|
|
|
pipeIt2graphviz :: String -> String -> IO BS.ByteString
|
|
pipeIt2graphviz fmt code = do
|
|
(Just inh, Just outh, _, pid) <-
|
|
createProcess (proc "dot" ["-T",fmt])
|
|
{ std_in = CreatePipe,
|
|
std_out = CreatePipe,
|
|
std_err = Inherit }
|
|
|
|
hSetBinaryMode outh True
|
|
hSetEncoding inh utf8
|
|
|
|
-- fork off a thread to start consuming the output
|
|
output <- BS.hGetContents outh
|
|
outMVar <- newEmptyMVar
|
|
_ <- forkIO $ E.evaluate (BS.length output) >> putMVar outMVar ()
|
|
|
|
-- now write and flush any input
|
|
hPutStr inh code
|
|
hFlush inh
|
|
hClose inh -- done with stdin
|
|
|
|
-- wait on the output
|
|
takeMVar outMVar
|
|
hClose outh
|
|
|
|
-- wait on the process
|
|
ex <- waitForProcess pid
|
|
|
|
case ex of
|
|
ExitSuccess -> return output
|
|
ExitFailure r -> fail ("pipeIt2graphviz: (exit " ++ show r ++ ")")
|
|
|
|
browse1json pgf id pn = makeObj . maybe [] obj $ PGF.browse pgf id
|
|
where
|
|
obj (def,ps,cs) = if pn then (baseobj ++ pnames) else baseobj
|
|
where
|
|
baseobj = ["def".=def, "producers".=ps, "consumers".=cs]
|
|
pnames = ["printnames".=makeObj [(show lang).=PGF.showPrintName pgf lang id | lang <- PGF.languages pgf]]
|
|
|
|
|
|
doBrowse pgf (Just id) _ _ "json" pn = outputJSONP $ browse1json pgf id pn
|
|
doBrowse pgf Nothing _ _ "json" pn =
|
|
outputJSONP $ makeObj ["cats".=all (PGF.categories pgf),
|
|
"funs".=all (PGF.functions pgf)]
|
|
where
|
|
all = makeObj . map one
|
|
one id = PGF.showCId id.=browse1json pgf id pn
|
|
|
|
doBrowse pgf Nothing cssClass href _ pn = errorMissingId
|
|
doBrowse pgf (Just id) cssClass href _ pn = -- default to "html" format
|
|
outputHTML $
|
|
case PGF.browse pgf id of
|
|
Just (def,ps,cs) -> "<PRE>"++annotate def++"</PRE>\n"++
|
|
syntax++
|
|
(if not (null ps)
|
|
then "<BR/>"++
|
|
"<H3>Producers</H3>"++
|
|
"<P>"++annotateCIds ps++"</P>\n"
|
|
else "")++
|
|
(if not (null cs)
|
|
then "<BR/>"++
|
|
"<H3>Consumers</H3>"++
|
|
"<P>"++annotateCIds cs++"</P>\n"
|
|
else "")++
|
|
(if pn
|
|
then "<BR/>"++
|
|
"<H3>Print Names</H3>"++
|
|
"<P>"++annotatePrintNames++"</P>\n"
|
|
else "")
|
|
Nothing -> ""
|
|
where
|
|
syntax =
|
|
case PGF.functionType pgf id of
|
|
Just ty -> let (hypos,_,_) = PGF.unType ty
|
|
e = PGF.mkApp id (snd $ mapAccumL mkArg (1,1) hypos)
|
|
rows = ["<TR class=\"my-SyntaxRow\">"++
|
|
"<TD class=\"my-SyntaxLang\">"++PGF.showCId lang++"</TD>"++
|
|
"<TD class=\"my-SyntaxLin\">"++PGF.linearize pgf lang e++"</TD>"++
|
|
"</TR>"
|
|
| lang <- PGF.languages pgf]
|
|
in "<BR/>"++
|
|
"<H3>Syntax</H3>"++
|
|
"<TABLE class=\"my-SyntaxTable\">\n"++
|
|
"<TR class=\"my-SyntaxRow\">"++
|
|
"<TD class=\"my-SyntaxLang\">"++PGF.showCId (PGF.abstractName pgf)++"</TD>"++
|
|
"<TD class=\"my-SyntaxLin\">"++PGF.showExpr [] e++"</TD>"++
|
|
"</TR>\n"++
|
|
unlines rows++"\n</TABLE>"
|
|
Nothing -> ""
|
|
|
|
mkArg (i,j) (_,_,ty) = ((i+1,j+length hypos),e)
|
|
where
|
|
e = foldr (\(j,(bt,_,_)) -> PGF.mkAbs bt (PGF.mkCId ('X':show j))) (PGF.mkMeta i) (zip [j..] hypos)
|
|
(hypos,_,_) = PGF.unType ty
|
|
|
|
identifiers = PGF.functions pgf ++ PGF.categories pgf
|
|
|
|
annotate [] = []
|
|
annotate (c:cs)
|
|
| isIdentInitial c = let (id,cs') = break (not . isIdentChar) (c:cs)
|
|
in (if PGF.mkCId id `elem` identifiers
|
|
then mkLink id
|
|
else if id == "fun" || id == "data" || id == "cat" || id == "def"
|
|
then "<B>"++id++"</B>"
|
|
else id) ++
|
|
annotate cs'
|
|
| otherwise = c : annotate cs
|
|
|
|
annotateCIds ids = unwords (map (mkLink . PGF.showCId) ids)
|
|
|
|
isIdentInitial c = isAlpha c || c == '_'
|
|
isIdentChar c = isAlphaNum c || c == '_' || c == '\''
|
|
|
|
hrefAttr id =
|
|
case href of
|
|
Nothing -> ""
|
|
Just s -> "href=\""++substId id s++"\""
|
|
|
|
substId id [] = []
|
|
substId id ('$':'I':'D':cs) = id ++ cs
|
|
substId id (c:cs) = c : substId id cs
|
|
|
|
classAttr =
|
|
case cssClass of
|
|
Nothing -> ""
|
|
Just s -> "class=\""++s++"\""
|
|
|
|
mkLink s = "<A "++hrefAttr s++" "++classAttr++">"++s++"</A>"
|
|
|
|
annotatePrintNames = "<DL>"++(unwords pns)++"</DL>"
|
|
where pns = ["<DT>"++(show lang)++"</DT><DD>"++(PGF.showPrintName pgf lang id)++"</DD>" | lang <- PGF.languages pgf ]
|
|
|
|
-- | Render trees as JSON with numbered functions
|
|
jsonExpr e = evalState (expr (PGF.toATree e)) 0
|
|
where
|
|
expr e =
|
|
case e of
|
|
PGF.Other e -> return (makeObj ["other".=e])
|
|
PGF.App f es ->
|
|
do js <- mapM expr es
|
|
let children=["children".=js | not (null js)]
|
|
i<-inc
|
|
return $ makeObj (["fun".=f,"fid".=i]++children)
|
|
|
|
inc :: State Int Int
|
|
inc = do i <- get; put (i+1); return i
|
|
|
|
instance JSON PGF.Trie where
|
|
showJSON (PGF.Oth e) = makeObj ["other".=e]
|
|
showJSON (PGF.Ap f [[]]) = makeObj ["fun".=f] -- leaf
|
|
-- showJSON (PGF.Ap f [es]) = makeObj ["fun".=f,"children".=es] -- one alternative
|
|
showJSON (PGF.Ap f alts) = makeObj ["fun".=f,"alts".=alts]
|
|
|
|
instance JSON PGF.CId where
|
|
readJSON x = readJSON x >>= maybe (fail "Bad language.") return . PGF.readLanguage
|
|
showJSON = showJSON . PGF.showLanguage
|
|
|
|
instance JSON PGF.Expr where
|
|
readJSON x = readJSON x >>= maybe (fail "Bad expression.") return . PGF.readExpr
|
|
showJSON = showJSON . PGF.showExpr []
|
|
|
|
instance JSON PGF.BracketedString where
|
|
readJSON x = return (PGF.Leaf "")
|
|
showJSON (PGF.Bracket cat fid index fun _ bs) =
|
|
makeObj ["cat".=cat, "fid".=fid, "index".=index, "fun".=fun, "children".=bs]
|
|
showJSON (PGF.Leaf s) = makeObj ["token".=s]
|
|
|
|
-- * PGF utilities
|
|
|
|
cat :: PGF -> Maybe PGF.Type -> PGF.Type
|
|
cat pgf mcat = fromMaybe (PGF.startCat pgf) mcat
|
|
|
|
parse' :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> [(PGF.Language,PGF.ParseOutput,PGF.BracketedString)]
|
|
parse' pgf input mcat mfrom =
|
|
[(from,po,bs) | from <- froms, (po,bs) <- [PGF.parse_ pgf from cat Nothing input]]
|
|
where froms = maybe (PGF.languages pgf) (:[]) mfrom
|
|
cat = fromMaybe (PGF.startCat pgf) mcat
|
|
|
|
complete' :: PGF -> PGF.Language -> PGF.Type -> Maybe Int -> String
|
|
-> (PGF.BracketedString, String, [String])
|
|
complete' pgf from typ mlimit input =
|
|
let (ws,prefix) = tokensAndPrefix input
|
|
ps0 = PGF.initState pgf from typ
|
|
(ps,ws') = loop ps0 ws
|
|
bs = snd (PGF.getParseOutput ps typ Nothing)
|
|
in if not (null ws')
|
|
then (bs, unwords (if null prefix then ws' else ws'++[prefix]), [])
|
|
else (bs, prefix, maybe id take mlimit $ order $ Map.keys (PGF.getCompletions ps prefix))
|
|
where
|
|
order = sortBy (compare `on` map toLower)
|
|
|
|
tokensAndPrefix :: String -> ([String],String)
|
|
tokensAndPrefix s | not (null s) && isSpace (last s) = (ws, "")
|
|
| null ws = ([],"")
|
|
| otherwise = (init ws, last ws)
|
|
where ws = words s
|
|
|
|
loop ps [] = (ps,[])
|
|
loop ps (w:ws) = case PGF.nextState ps (PGF.simpleParseInput w) of
|
|
Left es -> (ps,w:ws)
|
|
Right ps -> loop ps ws
|
|
|
|
transfer lang = if "LaTeX" `isSuffixOf` show lang
|
|
then fold -- OpenMath LaTeX transfer
|
|
else id
|
|
|
|
-- | tabulate all variants and their forms
|
|
linearizeTabular
|
|
:: PGF -> [PGF.Language] -> PGF.Tree -> [(PGF.Language,[(String,[String])])]
|
|
linearizeTabular pgf tos tree =
|
|
[(to,lintab to (transfer to tree)) | to <- langs]
|
|
where
|
|
langs = if null tos then PGF.languages pgf else tos
|
|
lintab to t = [(p,map doBind (nub [t|(p',t)<-vs,p'==p]))|p<-ps]
|
|
where
|
|
ps = nub (map fst vs)
|
|
vs = concat (PGF.tabularLinearizes pgf to t)
|
|
|
|
linearizeAndBind pgf mto tree =
|
|
[(to,s,bss) | to<-langs,
|
|
let bss = PGF.bracketedLinearize pgf to (transfer to tree)
|
|
s = unwords . bind $ concatMap PGF.flattenBracketedString bss]
|
|
where
|
|
langs = if null mto then PGF.languages pgf else mto
|
|
|
|
doBind = unwords . bind . words
|
|
bind ws = case ws of
|
|
w : "&+" : u : ws2 -> bind ((w ++ u) : ws2)
|
|
"&+":ws2 -> bind ws2
|
|
w : ws2 -> w : bind ws2
|
|
_ -> ws
|
|
|
|
selectLanguage :: PGF -> Maybe (Accept Language) -> PGF.Language
|
|
selectLanguage pgf macc = case acceptable of
|
|
[] -> case PGF.languages pgf of
|
|
[] -> error "No concrete syntaxes in PGF grammar."
|
|
l:_ -> l
|
|
Language c:_ -> fromJust (langCodeLanguage pgf c)
|
|
where langCodes = mapMaybe (PGF.languageCode pgf) (PGF.languages pgf)
|
|
acceptable = negotiate (map Language langCodes) macc
|
|
|
|
langCodeLanguage :: PGF -> String -> Maybe PGF.Language
|
|
langCodeLanguage pgf code = listToMaybe [l | l <- PGF.languages pgf, PGF.languageCode pgf l == Just code]
|
|
|
|
-- * General utilities
|
|
|
|
f .= v = (f,showJSON v)
|
|
f # x = fmap f x
|
|
f % x = ap f x
|
|
|
|
--cleanFilePath :: FilePath -> FilePath
|
|
--cleanFilePath = takeFileName
|