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|
-- This generates the prelude index to the report by hyper-linking all
-- of the names in a hand-written document. This is probably too
-- obscure to bother explaining. Hardwires for the Haskell report at the
-- moment.
module Main where
import System.IO
import Data.Char
import Control.Exception(catch)
main = do refs <- readRefFile "reportrefs"
doFiles refs ["prelude-index"]
doFiles r files = do sequence (map (doFile r) files)
putStr "Done.\n"
doFile r f = catch
(do putStr ("Reading " ++ f ++ ".idx\n")
ls <-readFile (f ++ ".idx")
let output = expandAllRefs r (lines ls)
writeFile ("haskell98-report-html/" ++ f ++ ".html") (unlines output))
(\err -> putStr ("Error: " ++ show (err::IOError) ++ "\n"))
-- This sets up the parts of the state that need to be reset at the start of
-- each file.
type Refs = [(String,String)]
expandAllRefs r ls = expandAll1 r False ls
expandAll1 r table [] = []
expandAll1 r table (l:ls) | l == "#table" = expandAll1 r True ls
| l == "#endtable" = expandAll1 r False ls
| table = ("<tr><td><tt>" ++ nbspaces (expandRefs r l)
++ "</tt></td></tr>") : rest
| otherwise = (expandRefs r l) : rest
where rest = expandAll1 r table ls
expandRefs :: Refs -> String -> String
expandRefs r "" = ""
expandRefs r ('#':l) = expandRef r "" l
expandRefs r (c:cs) = c : expandRefs r cs
expandRef r txt ('V':l) = expandVar r txt (parseRef l)
expandRef r txt ('I':l) = expandInstance r txt (parseRef l)
expandRef r txt ('T':l) = expandTycon r txt (parseRef l)
expandRef r txt ('L':l) = expandLink r txt (parseRef l)
expandRef r txt ('S':l) = expandSect r txt (parseRef l)
expandRef r txt ('&':l) = "</tt></td><td><tt>" ++ expandRefs r l
expandRef r txt ('#':l) = "#" ++ expandRefs r l
expandRef r txt ('.':l) = expandRefs r l
expandRef r txt l = error ("Bad ref:" ++ l ++ "\n")
parseRef = break (\c -> isSpace c || c == '#')
expandVar r txt (v,rest) = let n = mangleVar v
f = lookup n r in
case f of
Nothing -> trySig r txt v rest n
_ -> anchor v f n txt ++ expandRefs r rest
expandTycon r txt (t,rest) = let n = mangleTycon t
f = lookup n r in
anchor t f n txt ++ expandRefs r rest
expandInstance r txt (c,'#':rest ) = let (t,rest') = parseRef rest
n = mangleInstance c t
f = lookup n r in
anchor c f n txt ++ expandRefs r rest'
expandInstance r txt (c,l) = error ("bad instance " ++ l ++ "\n")
expandSect r txt (s,rest) = let n = mangleSect s
f = lookup n r in
"(see " ++ anchor s f n txt ++ ")" ++
expandRefs r rest
expandLink r _ (t,'#':l') = expandRef r t l'
expandLink r _ (l,l') = error ("Bad link: " ++ l ++ l' ++ "\n")
trySig r txt v rest n =
let c = parseClass rest
n = mangleTycon c
f = lookup n r in
anchor v f n txt ++ expandRefs r rest
anchor str file tag txt =
case file of
Just f -> "<a href=\"" ++ f ++ ".html#" ++ tag ++
"\">" ++ t ++ "</a>"
Nothing -> "Bad tag:" ++ tag ++ " " ++ t
where
t = htmlS $ if txt == "" then str else txt
mangleVar n = "$v" ++ mangleName (filter (\c -> not (c `elem` "()")) n)
mangleTycon n = "$t" ++ mangleName n
mangleInstance c t = "$i" ++ mangleName c ++ "$$" ++ mangleName t
mangleSect s = "sect" ++ s
mangleName r = concat $
map (\c -> case c of '(' -> "$P"
')' -> "$C"
'-' -> "$D"
'[' -> "$B"
']' -> "$c"
',' -> "$x"
'#' -> "$p"
'$' -> "$D"
'|' -> "$b"
'!' -> "$E"
'&' -> "$A"
'^' -> "$U"
'>' -> "$G"
'<' -> "$L"
'=' -> "$Q"
_ -> [c]) r
mangleType t = mangleName (case t of
"(IO" -> "IO"
"(a->b)" -> "->"
"[a]" -> "[]"
x -> x)
readRefFile :: String -> IO [(String, String)]
readRefFile f = catch (do l <- readFile f
return (map parseKV (lines l)))
(\e -> do putStr ("Can't read ref file: " ++ f ++ ": " ++ show (e::IOError) ++ "\n")
return [])
parseKV l = let (k,l1) = span (/= '=') l
val = case l1 of
('=':v) -> trim v
_ -> ""
in (trimr k,val)
parseClass s = let s1 = (skip "(" . skip "::") s
(c,_) = span isAlpha (trim s1) in
c
trim s = dropWhile isSpace s
trimr s = reverse (dropWhile isSpace (reverse s))
starts [] _ = True
starts _ [] = False
starts (a:as) (b:bs) | a == b = starts as bs
| otherwise = False
skip val s = if val `starts` (trim s) then
drop (length val) (trim s)
else s
htmlEncode '>' = ">"
htmlEncode '<' = "<"
htmlEncode '&' = "&"
htmlEncode c = [c]
htmlS s = concat (map htmlEncode s)
nbspaces [] = []
nbspaces (' ' : cs) = " " ++ nbspaces cs
nbspaces ('<':cs) = ['<'] ++ c ++ nbspaces r where
(c,r) = span (/= '>') cs
nbspaces (c:cs) = c:nbspaces cs
|
