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| author | Albert Krewinkel <albert@zeitkraut.de> | 2017-09-29 00:11:52 +0200 |
|---|---|---|
| committer | Albert Krewinkel <albert@zeitkraut.de> | 2017-09-30 09:57:03 +0200 |
| commit | 2f47e04206a3869eadc5c93076e0b50d4362f9df (patch) | |
| tree | 0ffc1a8097241395091cb702055b8ef8463d8e9b /src/Text/Pandoc/Class.hs | |
| parent | 950c68c83562d35bf1f93a213a33f227d1948451 (diff) | |
Text.Pandoc.Lua: add mediabag submodule
Diffstat (limited to 'src/Text/Pandoc/Class.hs')
| -rw-r--r-- | src/Text/Pandoc/Class.hs | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/src/Text/Pandoc/Class.hs b/src/Text/Pandoc/Class.hs index 98c567afc..f60062d6c 100644 --- a/src/Text/Pandoc/Class.hs +++ b/src/Text/Pandoc/Class.hs @@ -79,6 +79,7 @@ module Text.Pandoc.Class ( PandocMonad(..) , runPure , readDefaultDataFile , readDataFile + , fetchMediaResource , fillMediaBag , extractMedia , toLang @@ -246,9 +247,9 @@ getMediaBag = getsCommonState stMediaBag insertMedia :: PandocMonad m => FilePath -> Maybe MimeType -> BL.ByteString -> m () insertMedia fp mime bs = do - mb <- getsCommonState stMediaBag + mb <- getMediaBag let mb' = MB.insertMedia fp mime bs mb - modifyCommonState $ \st -> st{stMediaBag = mb' } + setMediaBag mb' getInputFiles :: PandocMonad m => m (Maybe [FilePath]) getInputFiles = getsCommonState stInputFiles @@ -633,6 +634,20 @@ withPaths (p:ps) action fp = catchError (action (p </> fp)) (\_ -> withPaths ps action fp) +-- | Fetch local or remote resource (like an image) and provide data suitable +-- for adding it to the MediaBag. +fetchMediaResource :: PandocMonad m + => Maybe String -> String + -> m (FilePath, Maybe MimeType, BL.ByteString) +fetchMediaResource sourceUrl src = do + (bs, mt) <- downloadOrRead sourceUrl src + let ext = fromMaybe (takeExtension src) + (mt >>= extensionFromMimeType) + let bs' = BL.fromChunks [bs] + let basename = showDigest $ sha1 bs' + let fname = basename <.> ext + return (fname, mt, bs') + -- | Traverse tree, filling media bag for any images that -- aren't already in the media bag. fillMediaBag :: PandocMonad m => Maybe String -> Pandoc -> m Pandoc @@ -643,13 +658,8 @@ fillMediaBag sourceURL d = walkM handleImage d case lookupMedia src mediabag of Just (_, _) -> return $ Image attr lab (src, tit) Nothing -> do - (bs, mt) <- downloadOrRead sourceURL src - let ext = fromMaybe (takeExtension src) - (mt >>= extensionFromMimeType) - let bs' = BL.fromChunks [bs] - let basename = showDigest $ sha1 bs' - let fname = basename <.> ext - insertMedia fname mt bs' + (fname, mt, bs) <- fetchMediaResource sourceURL src + insertMedia fname mt bs return $ Image attr lab (fname, tit)) (\e -> case e of |