diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Text/Pandoc/Readers/Org.hs | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/src/Text/Pandoc/Readers/Org.hs b/src/Text/Pandoc/Readers/Org.hs index d82541638..3f29d06ef 100644 --- a/src/Text/Pandoc/Readers/Org.hs +++ b/src/Text/Pandoc/Readers/Org.hs @@ -1239,37 +1239,37 @@ applyCustomLinkFormat link = do formatter <- M.lookup linkType <$> asksF orgStateLinkFormatters return $ maybe link ($ drop 1 rest) formatter --- TODO: might be a lot smarter/cleaner to use parsec and ADTs for this kind --- of parsing. +-- | Take a link and return a function which produces new inlines when given +-- description inlines. linkToInlinesF :: String -> Inlines -> F Inlines -linkToInlinesF s = +linkToInlinesF linkStr = + case linkStr of + "" -> pure . B.link mempty "" -- wiki link (empty by convention) + ('#':_) -> pure . B.link linkStr "" -- document-local fraction + _ -> case cleanLinkString linkStr of + (Just cleanedLink) -> if isImageFilename cleanedLink + then const . pure $ B.image cleanedLink "" "" + else pure . B.link cleanedLink "" + Nothing -> internalLink linkStr -- other internal link + +-- | Cleanup and canonicalize a string describing a link. Return @Nothing@ if +-- the string does not appear to be a link. +cleanLinkString :: String -> Maybe String +cleanLinkString s = case s of - "" -> pure . B.link "" "" - ('#':_) -> pure . B.link s "" - _ | isImageFilename s -> const . pure $ B.image s "" "" - _ | isFileLink s -> pure . B.link (dropLinkType s) "" - _ | isUri s -> pure . B.link s "" - _ | isAbsoluteFilePath s -> pure . B.link ("file://" ++ s) "" - _ | isRelativeFilePath s -> pure . B.link s "" - _ -> internalLink s - -isFileLink :: String -> Bool -isFileLink s = ("file:" `isPrefixOf` s) && not ("file://" `isPrefixOf` s) - -dropLinkType :: String -> String -dropLinkType = tail . snd . break (== ':') - -isRelativeFilePath :: String -> Bool -isRelativeFilePath s = (("./" `isPrefixOf` s) || ("../" `isPrefixOf` s)) && - (':' `notElem` s) - -isUri :: String -> Bool -isUri s = let (scheme, path) = break (== ':') s - in all (\c -> isAlphaNum c || c `elem` (".-" :: String)) scheme - && not (null path) - -isAbsoluteFilePath :: String -> Bool -isAbsoluteFilePath = ('/' ==) . head + '/':_ -> Just $ "file://" ++ s -- absolute path + '.':'/':_ -> Just s -- relative path + '.':'.':'/':_ -> Just s -- relative path + -- Relative path or URL (file schema) + 'f':'i':'l':'e':':':s' -> Just $ if ("//" `isPrefixOf` s') then s else s' + _ | isUrl s -> Just s -- URL + _ -> Nothing + where + isUrl :: String -> Bool + isUrl cs = + let (scheme, path) = break (== ':') cs + in all (\c -> isAlphaNum c || c `elem` (".-"::String)) scheme + && not (null path) isImageFilename :: String -> Bool isImageFilename filename = |