activehs-0.3.1: Converter.hs
{-# LANGUAGE PatternGuards, ViewPatterns, NamedFieldPuns #-}
module Converter
( convert
) where
import Parse
import Smart (TaskChan, restart, interp)
import Result (hasError)
import Html
import Lang
import Args
import Hash
import qualified Language.Haskell.Exts.Pretty as HPty
import qualified Language.Haskell.Exts.Syntax as HSyn
import Text.XHtml.Strict hiding (lang)
import Text.Pandoc
import System.Process (readProcessWithExitCode)
import System.Cmd
import System.FilePath
import System.Exit
import System.Directory (getTemporaryDirectory, getModificationTime, doesFileExist, getTemporaryDirectory, createDirectoryIfMissing)
--import Data.Time (diffUTCTime)
import Control.Monad
import Data.List
import Data.Char
----------------------------------
convert :: TaskChan -> Args -> String -> IO ()
convert ghci args@(Args {magicname, sourcedir, gendir, recompilecmd, verbose}) what = do
whenOutOfDate () output input $ do
whenOutOfDate () object input $ do
when (verbose > 0) $ putStrLn $ object ++ " is out of date, regenerating"
-- x <- system $ recompilecmd ++ " " ++ input
let (ghc:args) = words recompilecmd -- !!!
(x, out, err) <- readProcessWithExitCode ghc (args ++ [input]) ""
if x == ExitSuccess
then do
restart ghci
return ()
else fail $ unlines [unwords [recompilecmd, input], show x, out, err]
when (verbose > 0) $ putStrLn $ output ++ " is out of date, regenerating"
mainParse HaskellMode input >>= extract HaskellMode (verbose > 0) ghci args what
where
input = sourcedir </> what <.> "lhs"
output = gendir </> what <.> "xml"
object = sourcedir </> what <.> "o"
extract :: ParseMode -> Bool -> TaskChan -> Args -> Language -> Doc -> IO ()
extract mode verbose ghci (Args {lang, templatedir, sourcedir, exercisedir, gendir, magicname}) what (Doc meta modu ss) = do
writeEx (what <.> ext) [showEnv mode $ importsHiding []]
ss' <- zipWithM processBlock [1..] $ preprocessForSlides ss
ht <- readFile' $ templatedir </> lang' ++ ".template"
writeFile' (gendir </> what <.> "xml") $ flip writeHtmlString (Pandoc meta $ concat ss')
$ def
{ writerStandalone = True
, writerTableOfContents = True
, writerSectionDivs = True
, writerTemplate = ht
}
where
ext = case mode of
HaskellMode -> "hs"
lang' = case span (/= '_') . reverse $ what of
(l, "") -> lang
(l, _) | length l > 2 -> lang
(x, _) -> reverse x
writeEx f l =
writeFile' (exercisedir </> f) $ intercalate delim l
writeFile' f s = do
when verbose $ putStrLn $ f ++ " is written."
createDirectoryIfMissing True (dropFileName f)
writeFile f s
readFile' f = do
when verbose $ putStrLn $ f ++ " is to read..."
readFile f
system' s = do
when verbose $ putStrLn $ "executing " ++ s
system s
importsHiding funnames = case modu of
HaskellModule (HSyn.Module loc (HSyn.ModuleName modname) directives _ _ imps _) ->
HPty.prettyPrint $
HSyn.Module loc (HSyn.ModuleName "Main") directives Nothing Nothing
([mkImport modname funnames, mkImport_ ('X':magicname) modname] ++ imps) []
-- _ -> error "error in Converter.extract"
mkCodeBlock l =
[ CodeBlock ("", ["haskell"], []) $ intercalate "\n" l | not $ null l ]
----------------------------
processBlock :: Int -> BBlock -> IO [Block]
processBlock _ (Exercise visihidden _ _ funnames is)
| null funnames || null is
= return $ mkCodeBlock $ visihidden
processBlock _ (Exercise _ visi hidden funnames is) = do
let i = show $ mkHash $ unlines funnames
j = "_j" ++ i
fn = what ++ "_" ++ i <.> ext
(static_, inForm, rows) = if null hidden
then ([], visi, length visi)
else (visi, [], 2 + length hidden)
writeEx fn [ showEnv mode $ importsHiding funnames ++ "\n" ++ unlines static_
, unlines $ hidden, show $ map parseQuickCheck is, j, i
, show funnames ]
return
$ mkCodeBlock static_
++ showBlockSimple lang' fn i rows (intercalate "\n" inForm)
processBlock ii (OneLineExercise 'H' erroneous exp)
= return []
processBlock ii (OneLineExercise p erroneous exp) = do
let m5 = mkHash $ show ii ++ exp
i = show m5
fn = what ++ (if p == 'R' then "_" ++ i else "") <.> ext
act = getOne "eval" fn i i
when (p == 'R') $ writeEx fn [showEnv mode $ importsHiding [], "\n" ++ magicname ++ " = " ++ exp]
(b, exp') <- if p == 'F' && all (==' ') exp
then return (True, [])
else do
when verbose $ putStrLn $ "interpreting " ++ exp
r <- interp False m5 lang' ghci (exercisedir </> fn) exp $ \a -> return $ return []
return $ (not $ hasError r, take 1 r)
when (erroneous /= b)
$ error $ translate lang' "Erroneous evaluation" ++ ": " ++ exp ++ " ; " ++ showHtmlFragment (renderResults_ exp')
return [rawHtml $ showHtmlFragment $ showInterpreter lang' 60 act i p exp exp']
processBlock _ (Text (CodeBlock ("",[t],[]) l))
| t `elem` ["dot","neato","twopi","circo","fdp","dfdp","latex"] = do
tmpdir <- getTemporaryDirectory
let i = show $ mkHash $ t ++ l
fn = what ++ i
imgname = takeFileName fn <.> "png"
outfile = gendir </> fn <.> "png"
tmpfile = tmpdir </> takeFileName fn <.> if t=="latex" then "tex" else t
writeFile' tmpfile $ unlines $ case t of
"latex" ->
[ "\\documentclass{article}"
, "\\usepackage{ucs}"
, "\\usepackage[utf8x]{inputenc}"
, "\\usepackage{amsmath}"
, "\\pagestyle{empty}"
-- , "\\newcommand{\\cfrac}[2]{\\displaystyle\\frac{#1}{#2}}"
, "\\begin{document}"
, "$$", l, "$$"
, "\\end{document}" ]
_ ->
["digraph G {", l, "}"]
createDirectoryIfMissing True (dropFileName outfile)
x <- system' $ unwords $ case t of
"latex" -> [ "(", "cd", dropFileName tmpfile, "&&"
, "latex -halt-on-error", takeFileName tmpfile, "2>&1 >/dev/null", ")"
, "&&", "(", "dvipng -D 150 -T tight", "-o", outfile
, replaceExtension tmpfile "dvi", "2>&1 >/dev/null",")"]
_ -> [ t, "-Tpng", "-o", outfile, tmpfile, "2>&1 >/dev/null" ]
if x == ExitSuccess
then return [Para [Image [Str imgname] (imgname, "")]]
else fail $ "processDot " ++ tmpfile ++ "; " ++ show x
processBlock _ (Text l)
= return [l]
---------------------------------
preprocessForSlides :: [BBlock] -> [BBlock]
preprocessForSlides x = case span (not . isLim) x of
(a, []) -> a
(a, b) -> a ++ case span (not . isHeader) b of
(c, d) -> [Text $ rawHtml "<div class=\"handout\">"] ++ c
++ [Text $ rawHtml "</div>"] ++ preprocessForSlides d
where
isLim (Text HorizontalRule) = True
isLim _ = False
isHeader (Text (Header {})) = True
isHeader _ = False
------------------------------------
rawHtml :: String -> Block
rawHtml x = RawBlock "html" x
showBlockSimple :: Language -> String -> String -> Int -> String -> [Block]
showBlockSimple lang fn i rows_ cont = (:[]) $ rawHtml $ showHtmlFragment $ indent $
[ form
! [ theclass $ if null cont then "interpreter" else "resetinterpreter"
, action $ getOne "check" fn i i
]
<<[ textarea
! [ cols "80"
, rows $ show rows_
, identifier $ "tarea" ++ i
]
<< cont
, br
, input ! [thetype "submit", value $ translate lang "Check"]
]
, thediv ! [theclass "answer", identifier $ "res" ++ i] << ""
]
-----------------
showEnv :: ParseMode -> String -> String
showEnv HaskellMode prelude
= "{-# LINE 1 \"testenv\" #-}\n"
++ prelude
++ "\n{-# LINE 1 \"input\" #-}\n"
mkImport :: String -> [Name] -> HSyn.ImportDecl
mkImport m d
= HSyn.ImportDecl
{ HSyn.importLoc = undefined
, HSyn.importModule = HSyn.ModuleName m
, HSyn.importQualified = False
, HSyn.importSrc = False
, HSyn.importPkg = Nothing
, HSyn.importAs = Nothing
, HSyn.importSpecs = Just (True, map (HSyn.IVar . mkName) d)
}
mkName :: String -> HSyn.Name
mkName n@(c:_)
| isSymbol c = HSyn.Symbol n
mkName n = HSyn.Ident n
mkImport_ :: String -> String -> HSyn.ImportDecl
mkImport_ magic m
= (mkImport m []) { HSyn.importQualified = True, HSyn.importAs = Just $ HSyn.ModuleName magic }
------------------
whenOutOfDate :: b -> FilePath -> FilePath -> IO b -> IO b
whenOutOfDate def x src m = do
a <- modTime x
b <- modTime src
case (a, b) of
(Nothing, Just _) -> m
(Just t1, Just t2) | t1 < t2 -> m
_ -> return def
where
modTime f = do
a <- doesFileExist f
if a then fmap Just $ getModificationTime f else return Nothing
--------------------