diff options
| -rw-r--r-- | src/Text/Pandoc/Readers/Org.hs | 27 | ||||
| -rw-r--r-- | tests/Tests/Readers/Org.hs | 12 |
2 files changed, 38 insertions, 1 deletions
diff --git a/src/Text/Pandoc/Readers/Org.hs b/src/Text/Pandoc/Readers/Org.hs index 1d348dfe3..67470eff9 100644 --- a/src/Text/Pandoc/Readers/Org.hs +++ b/src/Text/Pandoc/Readers/Org.hs @@ -69,7 +69,32 @@ parseOrg = do blocks' <- parseBlocks st <- getState let meta = runF (orgStateMeta' st) st - return $ Pandoc meta $ filter (/= Null) (B.toList $ runF blocks' st) + let removeUnwantedBlocks = dropCommentTrees . filter (/= Null) + return $ Pandoc meta $ removeUnwantedBlocks (B.toList $ runF blocks' st) + +-- | Drop COMMENT headers and the document tree below those headers. +dropCommentTrees :: [Block] -> [Block] +dropCommentTrees [] = [] +dropCommentTrees blks@(b:bs) = + maybe blks (flip dropUntilHeaderAboveLevel bs) $ commentHeaderLevel b + +-- | Return the level of a header starting a comment tree and Nothing +-- otherwise. +commentHeaderLevel :: Block -> Maybe Int +commentHeaderLevel blk = + case blk of + (Header level _ ((Str "COMMENT"):_)) -> Just level + _ -> Nothing + +-- | Drop blocks until a header on or above the given level is seen +dropUntilHeaderAboveLevel :: Int -> [Block] -> [Block] +dropUntilHeaderAboveLevel n = dropWhile (not . isHeaderLevelLowerEq n) + +isHeaderLevelLowerEq :: Int -> Block -> Bool +isHeaderLevelLowerEq n blk = + case blk of + (Header level _ _) -> n >= level + _ -> False -- -- Parser State for Org diff --git a/tests/Tests/Readers/Org.hs b/tests/Tests/Readers/Org.hs index 5ea859255..f893e5aa2 100644 --- a/tests/Tests/Readers/Org.hs +++ b/tests/Tests/Readers/Org.hs @@ -458,6 +458,18 @@ tests = , header 2 ("walk" <> space <> "dog") ] + , "Comment Trees" =: + unlines [ "* COMMENT A comment tree" + , " Not much going on here" + , "** This will be dropped" + , "* Comment tree above" + ] =?> + header 1 "Comment tree above" + + , "Nothing but a COMMENT header" =: + "* COMMENT Test" =?> + (mempty::Blocks) + , "Paragraph starting with an asterisk" =: "*five" =?> para "*five" |