diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Text/Pandoc/Writers/EPUB.hs | 113 |
1 files changed, 62 insertions, 51 deletions
diff --git a/src/Text/Pandoc/Writers/EPUB.hs b/src/Text/Pandoc/Writers/EPUB.hs index 4a93d52e2..8e283a66a 100644 --- a/src/Text/Pandoc/Writers/EPUB.hs +++ b/src/Text/Pandoc/Writers/EPUB.hs @@ -29,7 +29,6 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Conversion of 'Pandoc' documents to EPUB. -} module Text.Pandoc.Writers.EPUB ( writeEPUB, writeEPUBPure ) where -import Data.IORef ( IORef ) import qualified Data.Map as M import qualified Data.Set as Set import Data.Maybe ( fromMaybe, catMaybes ) @@ -54,7 +53,7 @@ import Text.Pandoc.Options ( WriterOptions(..) , ObfuscationMethod(NoObfuscation) ) import Text.Pandoc.Definition import Text.Pandoc.Walk (walk, walkM, query) -import Control.Monad.State (modify, get, State, put, evalState) +import Control.Monad.State (modify, get, gets, State, StateT, put, evalState, evalStateT, lift) import Control.Monad (mplus, when) import Text.XML.Light ( unode, Element(..), unqual, Attr(..), add_attrs , strContent, lookupAttr, Node(..), QName(..), parseXML @@ -75,6 +74,11 @@ type EPUBAction = PandocAction [(FilePath, (FilePath, Maybe Entry))] -- in filenames, chapter0003.xhtml. data Chapter = Chapter (Maybe [Int]) [Block] +data EPUBState = EPUBState { stMediaPaths :: [(FilePath, (FilePath, Maybe Entry))] + } + +type E = StateT EPUBState EPUBAction + data EPUBMetadata = EPUBMetadata{ epubIdentifier :: [Identifier] , epubTitle :: [Title] @@ -142,7 +146,7 @@ removeNote :: Inline -> Inline removeNote (Note _) = Str "" removeNote x = x -getEPUBMetadata :: WriterOptions -> Meta -> EPUBAction EPUBMetadata +getEPUBMetadata :: WriterOptions -> Meta -> E EPUBMetadata getEPUBMetadata opts meta = do let md = metadataFromMeta opts meta let elts = onlyElems $ parseXML $ writerEpubMetadata opts @@ -150,7 +154,7 @@ getEPUBMetadata opts meta = do let addIdentifier m = if null (epubIdentifier m) then do - randomId <- fmap show P.newUUID + randomId <- fmap show (lift P.newUUID) return $ m{ epubIdentifier = [Identifier randomId Nothing] } else return m let addLanguage m = @@ -158,7 +162,7 @@ getEPUBMetadata opts meta = do then case lookup "lang" (writerVariables opts) of Just x -> return m{ epubLanguage = x } Nothing -> do - mLang <- P.lookupEnv "LANG" + mLang <- lift $ P.lookupEnv "LANG" let localeLang = case mLang of Just lang -> @@ -170,7 +174,7 @@ getEPUBMetadata opts meta = do let fixDate m = if null (epubDate m) then do - currentTime <- P.getCurrentTime + currentTime <- lift P.getCurrentTime return $ m{ epubDate = [ Date{ dateText = showDateTimeISO8601 currentTime , dateEvent = Nothing } ] } @@ -338,12 +342,21 @@ writeEPUB :: WriterOptions -- ^ Writer options writeEPUB opts doc = runIO $ writeEPUBPure opts doc writeEPUBPure :: WriterOptions -- ^ Writer options - -> Pandoc -- ^ Document to convert - -> EPUBAction B.ByteString -writeEPUBPure opts doc@(Pandoc meta _) = do + -> Pandoc -- ^ Document to convert + -> EPUBAction B.ByteString +writeEPUBPure opts doc = + let initState = EPUBState { stMediaPaths = [] + } + in + evalStateT (pandocToEPUB opts doc) initState + +pandocToEPUB :: WriterOptions + -> Pandoc + -> E B.ByteString +pandocToEPUB opts doc@(Pandoc meta _) = do let version = fromMaybe EPUB2 (writerEpubVersion opts) let epub3 = version == EPUB3 - epochtime <- floor <$> P.getPOSIXTime + epochtime <- floor <$> lift P.getPOSIXTime let mkEntry path content = toEntry path epochtime content let vars = ("epub3", if epub3 then "true" else "false") : ("css", "stylesheet.css") @@ -368,7 +381,7 @@ writeEPUBPure opts doc@(Pandoc meta _) = do let cpContent = renderHtml $ writeHtml opts'{ writerVariables = ("coverpage","true"):vars } (Pandoc meta [RawBlock (Format "html") $ "<div id=\"cover-image\">\n<img src=\"" ++ coverImage ++ "\" alt=\"cover image\" />\n</div>"]) - imgContent <- P.readFileLazy img + imgContent <- lift $ P.readFileLazy img return ( [mkEntry "cover.xhtml" cpContent] , [mkEntry coverImage imgContent] ) @@ -379,18 +392,17 @@ writeEPUBPure opts doc@(Pandoc meta _) = do let tpEntry = mkEntry "title_page.xhtml" tpContent -- handle pictures - mediaRef <- P.newIORef [] - Pandoc _ blocks <- walkM (transformInline opts' mediaRef) doc >>= - walkM (transformBlock opts' mediaRef) - picEntries <- (catMaybes . map (snd . snd)) <$> P.readIORef mediaRef - + -- mediaRef <- P.newIORef [] + Pandoc _ blocks <- walkM (transformInline opts') doc >>= + walkM (transformBlock opts') + picEntries <- (catMaybes . map (snd . snd)) <$> (gets stMediaPaths) -- handle fonts let matchingGlob f = do - xs <- P.namesMatching f + xs <- lift $ P.namesMatching f when (null xs) $ - P.warn $ f ++ " did not match any font files." + lift $ P.warn $ f ++ " did not match any font files." return xs - let mkFontEntry f = mkEntry (takeFileName f) `fmap` P.readFileLazy f + let mkFontEntry f = mkEntry (takeFileName f) `fmap` (lift $ P.readFileLazy f) fontFiles <- concat <$> mapM matchingGlob (writerEpubFonts opts') fontEntries <- mapM mkFontEntry fontFiles @@ -527,7 +539,7 @@ writeEPUBPure opts doc@(Pandoc meta _) = do let uuid = case epubIdentifier metadata of (x:_) -> identifierText x -- use first identifier as UUID [] -> error "epubIdentifier is null" -- shouldn't happen - currentTime <- P.getCurrentTime + currentTime <- lift $ P.getCurrentTime let contentsData = UTF8.fromStringLazy $ ppTopElement $ unode "package" ! [("version", case version of EPUB2 -> "2.0" @@ -699,10 +711,10 @@ writeEPUBPure opts doc@(Pandoc meta _) = do -- stylesheet stylesheet <- case epubStylesheet metadata of - Just (StylesheetPath fp) -> P.readFileUTF8 fp + Just (StylesheetPath fp) -> lift $ P.readFileUTF8 fp Just (StylesheetContents s) -> return s Nothing -> UTF8.toString `fmap` - P.readDataFile (writerUserDataDir opts) "epub.css" + (lift $ P.readDataFile (writerUserDataDir opts) "epub.css") let stylesheetEntry = mkEntry "stylesheet.css" $ UTF8.fromStringLazy stylesheet -- construct archive @@ -819,78 +831,77 @@ showDateTimeISO8601 :: UTCTime -> String showDateTimeISO8601 = formatTime defaultTimeLocale "%FT%TZ" transformTag :: WriterOptions - -> IORef [(FilePath, (FilePath, Maybe Entry))] -- ^ (oldpath, newpath, entry) media + -- -> IORef [(FilePath, (FilePath, Maybe Entry))] -- ^ (oldpath, newpath, entry) media -> Tag String - -> EPUBAction (Tag String) -transformTag opts mediaRef tag@(TagOpen name attr) + -> E (Tag String) +transformTag opts tag@(TagOpen name attr) | name `elem` ["video", "source", "img", "audio"] && lookup "data-external" attr == Nothing = do let src = fromAttrib "src" tag let poster = fromAttrib "poster" tag - newsrc <- modifyMediaRef opts mediaRef src - newposter <- modifyMediaRef opts mediaRef poster + newsrc <- modifyMediaRef opts src + newposter <- modifyMediaRef opts poster let attr' = filter (\(x,_) -> x /= "src" && x /= "poster") attr ++ [("src", newsrc) | not (null newsrc)] ++ [("poster", newposter) | not (null newposter)] return $ TagOpen name attr' -transformTag _ _ tag = return tag +transformTag _ tag = return tag modifyMediaRef :: WriterOptions - -> IORef [(FilePath, (FilePath, Maybe Entry))] -> FilePath - -> EPUBAction FilePath -modifyMediaRef _ _ "" = return "" -modifyMediaRef opts mediaRef oldsrc = do - media <- P.readIORef mediaRef + -> E FilePath +modifyMediaRef _ "" = return "" +modifyMediaRef opts oldsrc = do + media <- gets stMediaPaths case lookup oldsrc media of Just (n,_) -> return n Nothing -> do - res <- P.fetchItem' (writerMediaBag opts) + res <- lift $ P.fetchItem' (writerMediaBag opts) (writerSourceURL opts) oldsrc (new, mbEntry) <- case res of Left _ -> do - P.warn $ "Could not find media `" ++ oldsrc ++ "', skipping..." + lift $ P.warn $ "Could not find media `" ++ oldsrc ++ "', skipping..." return (oldsrc, Nothing) Right (img,mbMime) -> do let new = "media/file" ++ show (length media) ++ fromMaybe (takeExtension (takeWhile (/='?') oldsrc)) (('.':) <$> (mbMime >>= extensionFromMimeType)) - epochtime <- floor `fmap` P.getPOSIXTime + epochtime <- floor `fmap` lift P.getPOSIXTime let entry = toEntry new epochtime $ B.fromChunks . (:[]) $ img return (new, Just entry) - P.modifyIORef mediaRef ( (oldsrc, (new, mbEntry)): ) + modify $ \st -> st{ stMediaPaths = (oldsrc, (new, mbEntry)):media} return new transformBlock :: WriterOptions - -> IORef [(FilePath, (FilePath, Maybe Entry))] -- ^ (oldpath, newpath, entry) media + -- -> IORef [(FilePath, (FilePath, Maybe Entry))] -- ^ (oldpath, newpath, entry) media -> Block - -> EPUBAction Block -transformBlock opts mediaRef (RawBlock fmt raw) + -> E Block +transformBlock opts (RawBlock fmt raw) | fmt == Format "html" = do let tags = parseTags raw - tags' <- mapM (transformTag opts mediaRef) tags + tags' <- mapM (transformTag opts) tags return $ RawBlock fmt (renderTags' tags') -transformBlock _ _ b = return b +transformBlock _ b = return b transformInline :: WriterOptions - -> IORef [(FilePath, (FilePath, Maybe Entry))] -- ^ (oldpath, newpath) media + -- -> IORef [(FilePath, (FilePath, Maybe Entry))] -- ^ (oldpath, newpath) media -> Inline - -> EPUBAction Inline -transformInline opts mediaRef (Image attr lab (src,tit)) = do - newsrc <- modifyMediaRef opts mediaRef src + -> E Inline +transformInline opts (Image attr lab (src,tit)) = do + newsrc <- modifyMediaRef opts src return $ Image attr lab (newsrc, tit) -transformInline opts mediaRef (x@(Math t m)) +transformInline opts (x@(Math t m)) | WebTeX url <- writerHTMLMathMethod opts = do - newsrc <- modifyMediaRef opts mediaRef (url ++ urlEncode m) + newsrc <- modifyMediaRef opts (url ++ urlEncode m) let mathclass = if t == DisplayMath then "display" else "inline" return $ Span ("",["math",mathclass],[]) [Image nullAttr [x] (newsrc, "")] -transformInline opts mediaRef (RawInline fmt raw) +transformInline opts (RawInline fmt raw) | fmt == Format "html" = do let tags = parseTags raw - tags' <- mapM (transformTag opts mediaRef) tags + tags' <- mapM (transformTag opts) tags return $ RawInline fmt (renderTags' tags') -transformInline _ _ x = return x +transformInline _ x = return x (!) :: (t -> Element) -> [(String, String)] -> t -> Element (!) f attrs n = add_attrs (map (\(k,v) -> Attr (unqual k) v) attrs) (f n) |