module Debug.Hoed.Pure.Render
(CompStmt(..)
,renderCompStmts
,CDS
,eventsToCDS
,rmEntrySet
,simplifyCDSSet
,noNewlines
) where
import Debug.Hoed.Pure.EventForest
import Text.PrettyPrint.FPretty hiding (sep)
import Prelude hiding(lookup)
import Debug.Hoed.Pure.Observe
import Data.List(sort,sortBy,partition,nub
#if __GLASGOW_HASKELL__ >= 710
, sortOn
#endif
)
import Data.Graph.Libgraph
import Data.Array as Array
import Data.Char(isAlpha)
import GHC.Generics
#if __GLASGOW_HASKELL__ < 710
sortOn :: Ord b => (a -> b) -> [a] -> [a]
sortOn f = map snd . sortOn' fst . map (\x -> (f x, x))
sortOn' :: Ord b => (a -> b) -> [a] -> [a]
sortOn' f = sortBy (\x y -> compare (f x) (f y))
#endif
data CompStmt = CompStmt { stmtLabel :: String
, stmtIdentifier :: UID
, stmtRes :: String
}
deriving (Eq,Ord,Generic)
instance Show CompStmt where
show = stmtRes
showList eqs eq = unlines (map show eqs) ++ eq
noNewlines :: String -> String
noNewlines = noNewlines' False
noNewlines' _ [] = []
noNewlines' w (s:ss)
| w && (s == ' ' || s == '\n') = noNewlines' True ss
| (not w) && (s == ' ' || s == '\n') = ' ' : noNewlines' True ss
| otherwise = s : noNewlines' False ss
renderCompStmts :: CDSSet -> [CompStmt]
renderCompStmts = foldl (\acc set -> acc ++ renderCompStmt set) []
renderCompStmt :: CDS -> [CompStmt]
renderCompStmt (CDSNamed name dependsOn set)
= map mkStmt statements
where statements :: [(String,UID)]
statements = map (\(d,i) -> (pretty 70 d,i)) doc
doc = foldl (\a b -> a ++ renderNamedTop name b) [] output
output = cdssToOutput set
mkStmt :: (String,UID) -> CompStmt
mkStmt (s,i) = CompStmt name i s
renderNamedTop :: String -> Output -> [(Doc,UID)]
renderNamedTop name (OutData cds)
= map (\(args,res,Just i) -> (renderNamedFn name (args,res), i)) pairs
where pairs = (nubSorted . sortOn argAndRes) pairs'
pairs' = findFn [cds]
argAndRes (arg,res,_) = (arg,res)
nubSorted :: Eq a => [a] -> [a]
nubSorted [] = []
nubSorted (a:a':as) | a == a' = nub (a' : as)
nubSorted (a:as) = a : nub as
data CDS = CDSNamed String UID CDSSet
| CDSCons UID String [CDSSet]
| CDSFun UID CDSSet CDSSet
| CDSEntered UID
| CDSTerminated UID
deriving (Show,Eq,Ord)
type CDSSet = [CDS]
eventsToCDS :: [Event] -> CDSSet
eventsToCDS pairs = getChild 0 0
where
res i = (!) out_arr i
bnds = (0, length pairs)
mid_arr :: Array Int [(Int,CDS)]
mid_arr = accumArray (flip (:)) [] bnds
[ (pnode,(pport,res node))
| (Event node (Parent pnode pport) _) <- pairs
]
out_arr = array bnds
[ (node,getNode'' node e change)
| e@(Event node _ change) <- pairs
]
getNode'' :: Int -> Event -> Change -> CDS
getNode'' node e change =
case change of
(Observe str i) -> let chd = getChild node 0
in CDSNamed str (getId chd i) chd
(Enter) -> CDSEntered node
(NoEnter) -> CDSTerminated node
Fun -> CDSFun node (getChild node 0) (getChild node 1)
(Cons portc cons)
-> CDSCons node cons
[ getChild node n | n <- [0..(portc1)]]
getId [] i = i
getId ((CDSFun i _ _ ):_) _ = i
getId (_:cs) i = getId cs i
getChild :: Int -> Int -> CDSSet
getChild pnode pport =
[ content
| (pport',content) <- (!) mid_arr pnode
, pport == pport'
]
render :: Int -> Bool -> CDS -> Doc
render prec par (CDSCons _ ":" [cds1,cds2]) =
if (par && not needParen)
then doc
else paren needParen doc
where
doc = grp (brk <> renderSet' 5 False cds1 <> text " : ") <>
renderSet' 4 True cds2
needParen = prec > 4
render prec par (CDSCons _ "," cdss) | length cdss > 0 =
nest 2 (text "(" <> foldl1 (\ a b -> a <> text ", " <> b)
(map renderSet cdss) <>
text ")")
render prec par (CDSCons _ name cdss)
| (not . isAlpha . head) name && length cdss > 1 =
paren (prec /= 0)
(grp
(renderSet' 10 False (head cdss)
<> sep <> text name
<> nest 2 (foldr (<>) nil
[ if cds == [] then nil else sep <> renderSet' 10 False cds
| cds <- tail cdss
]
)
)
)
| otherwise =
paren (length cdss > 0 && prec /= 0)
( grp
(text name <> nest 2 (foldr (<>) nil
[ sep <> renderSet' 10 False cds
| cds <- cdss
]
)
)
)
renderSet :: CDSSet -> Doc
renderSet = renderSet' 0 False
renderSet' :: Int -> Bool -> CDSSet -> Doc
renderSet' _ _ [] = text "_"
renderSet' prec par [cons@(CDSCons {})] = render prec par cons
renderSet' prec par cdss =
(text "{ " <> foldl1 (\ a b -> a <> line <>
text ", " <> b)
(map renderFn pairs) <>
line <> text "}")
where
findFn_noUIDs :: CDSSet -> [([CDSSet],CDSSet)]
findFn_noUIDs c = map (\(a,r,_) -> (a,r)) (findFn c)
pairs = nub (sort (findFn_noUIDs cdss))
nub [] = []
nub (a:a':as) | a == a' = nub (a' : as)
nub (a:as) = a : nub as
renderFn :: ([CDSSet],CDSSet) -> Doc
renderFn (args, res)
= grp (nest 3
(text "\\ " <>
foldr (\ a b -> nest 0 (renderSet' 10 False a) <> sp <> b)
nil
args <> sep <>
text "-> " <> renderSet' 0 False res
)
)
renderNamedFn :: String -> ([CDSSet],CDSSet) -> Doc
renderNamedFn name (args,res)
= text name <> nest 2
( sep <> (foldr (\ a b -> grp (renderSet' 10 False a) <> line <> b) nil args)
<> linebreak <> grp (text "= " <> renderSet' 0 False res)
)
findFn :: CDSSet -> [([CDSSet],CDSSet, Maybe UID)]
findFn = foldr findFn' []
findFn' (CDSFun i arg res) rest =
case findFn res of
[(args',res',_)] -> (arg : args', res', Just i) : rest
_ -> ([arg], res, Just i) : rest
findFn' other rest = ([],[other], Nothing) : rest
rmEntry :: CDS -> CDS
rmEntry (CDSNamed str i set) = CDSNamed str i (rmEntrySet set)
rmEntry (CDSCons i str sets) = CDSCons i str (map rmEntrySet sets)
rmEntry (CDSFun i a b) = CDSFun i (rmEntrySet a) (rmEntrySet b)
rmEntry (CDSTerminated i) = CDSTerminated i
rmEntry (CDSEntered i) = error "found bad CDSEntered"
rmEntrySet = map rmEntry . filter noEntered
where
noEntered (CDSEntered _) = False
noEntered _ = True
simplifyCDS :: CDS -> CDS
simplifyCDS (CDSNamed str i set) = CDSNamed str i (simplifyCDSSet set)
simplifyCDS (CDSCons _ "throw"
[[CDSCons _ "ErrorCall" set]]
) = simplifyCDS (CDSCons 0 "error" set)
simplifyCDS cons@(CDSCons i str sets) =
case spotString [cons] of
Just str | not (null str) -> CDSCons 0 (show str) []
_ -> CDSCons 0 str (map simplifyCDSSet sets)
simplifyCDS (CDSFun i a b) = CDSFun i (simplifyCDSSet a) (simplifyCDSSet b)
simplifyCDS (CDSTerminated i) = (CDSCons i "<?>" [])
simplifyCDSSet = map simplifyCDS
spotString :: CDSSet -> Maybe String
spotString [CDSCons _ ":"
[[CDSCons _ str []]
,rest
]
]
= do { ch <- case reads str of
[(ch,"")] -> return ch
_ -> Nothing
; more <- spotString rest
; return (ch : more)
}
spotString [CDSCons _ "[]" []] = return []
spotString other = Nothing
paren :: Bool -> Doc -> Doc
paren False doc = grp ( doc)
paren True doc = grp ( (text "(" <> doc <> text ")"))
data Output = OutLabel String CDSSet [Output]
| OutData CDS
deriving (Eq,Ord,Show)
cdssToOutput :: CDSSet -> [Output]
cdssToOutput = map cdsToOutput
cdsToOutput (CDSNamed name _ cdsset)
= OutLabel name res1 res2
where
res1 = [ cdss | (OutData cdss) <- res ]
res2 = [ out | out@(OutLabel {}) <- res ]
res = cdssToOutput cdsset
cdsToOutput cons@(CDSCons {}) = OutData cons
cdsToOutput fn@(CDSFun {}) = OutData fn
nil = Text.PrettyPrint.FPretty.empty
grp = Text.PrettyPrint.FPretty.group
brk = softbreak
sep = softline
sp :: Doc
sp = text " "