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module GF.Canon.CanonToJS (prCanon2js) where
import GF.Canon.GFC
import GF.Canon.CanonToGFCC
import qualified GF.Canon.GFCC.AbsGFCC as C
import qualified GF.JavaScript.AbsJS as JS
import qualified GF.JavaScript.PrintJS as JS
prCanon2js :: CanonGrammar -> String
prCanon2js = JS.printTree . gfcc2js . mkCanon2gfcc
gfcc2js :: C.Grammar -> JS.Program
gfcc2js (C.Grm _ _ cs) = concrete2js (head cs) -- FIXME
concrete2js :: C.Concrete -> JS.Program
concrete2js (C.Cnc c ds) = JS.Program (map cncdef2js ds)
cncdef2js :: C.CncDef -> JS.Element
cncdef2js (C.Lin (C.CId f) t) =
JS.FunDef (JS.Ident ("lin_"++f)) [children] [JS.Return (term2js t)]
term2js :: C.Term -> JS.Expr
term2js t =
case t of
C.R xs -> call "arr" (map term2js xs)
C.P x y -> JS.EMember (term2js x) (term2js y)
C.S xs -> call "seq" (map term2js xs)
C.K t -> tokn2js t
C.V i -> JS.EIndex (JS.EVar children) (JS.EInt i)
C.C i -> JS.EInt i
C.F (C.CId f) -> call ("lin_"++f) [JS.EVar children]
C.FV xs -> call "variants" (map term2js xs)
C.W str x -> call "suffix" [JS.EStr str, term2js x]
C.RP x y -> call "rp" [term2js x, term2js y]
C.TM -> call "meta" []
argIdent :: Integer -> JS.Ident
argIdent n = JS.Ident ("x" ++ show n)
tokn2js :: C.Tokn -> JS.Expr
tokn2js (C.KS s) = JS.EStr s
children :: JS.Ident
children = JS.Ident "cs"
call :: String -> [JS.Expr] -> JS.Expr
call f xs = JS.ECall (JS.EVar (JS.Ident f)) xs
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