diff options
Diffstat (limited to 'src/Text/Pandoc/Writers/Markdown.hs')
| -rw-r--r-- | src/Text/Pandoc/Writers/Markdown.hs | 75 |
1 files changed, 35 insertions, 40 deletions
diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs index eb633166d..e7acd762c 100644 --- a/src/Text/Pandoc/Writers/Markdown.hs +++ b/src/Text/Pandoc/Writers/Markdown.hs @@ -29,9 +29,7 @@ Conversion of 'Pandoc' documents to markdown-formatted plain text. Markdown: <http://daringfireball.net/projects/markdown/> -} -module Text.Pandoc.Writers.Markdown ( - writeMarkdown - ) where +module Text.Pandoc.Writers.Markdown ( writeMarkdown) where import Text.Pandoc.Definition import Text.Pandoc.Shared import Text.Pandoc.Blocks @@ -53,10 +51,10 @@ pandocToMarkdown :: WriterOptions -> Pandoc -> State WriterState Doc pandocToMarkdown opts (Pandoc meta blocks) = do let before = writerIncludeBefore opts let after = writerIncludeAfter opts - before' = if null before then empty else text before - after' = if null after then empty else text after + let before' = if null before then empty else text before + let after' = if null after then empty else text after metaBlock <- metaToMarkdown opts meta - let head = if (writerStandalone opts) + let head = if writerStandalone opts then metaBlock $+$ text (writerHeader opts) else empty let headerBlocks = filter isHeaderBlock blocks @@ -73,8 +71,7 @@ pandocToMarkdown opts (Pandoc meta blocks) = do -- | Return markdown representation of reference key table. keyTableToMarkdown :: WriterOptions -> KeyTable -> State WriterState Doc -keyTableToMarkdown opts refs = - mapM (keyToMarkdown opts) refs >>= (return . vcat) +keyTableToMarkdown opts refs = mapM (keyToMarkdown opts) refs >>= return . vcat -- | Return markdown representation of a reference key. keyToMarkdown :: WriterOptions @@ -90,7 +87,7 @@ keyToMarkdown opts (label, (src, tit)) = do notesToMarkdown :: WriterOptions -> [[Block]] -> State WriterState Doc notesToMarkdown opts notes = mapM (\(num, note) -> noteToMarkdown opts num note) (zip [1..] notes) >>= - (return . vcat) + return . vcat -- | Return markdown representation of a note. noteToMarkdown :: WriterOptions -> Int -> [Block] -> State WriterState Doc @@ -143,8 +140,7 @@ tableOfContents opts headers = -- | Converts an Element to a list item for a table of contents, elementToListItem :: Element -> [Block] elementToListItem (Blk _) = [] -elementToListItem (Sec headerText subsecs) = - [Plain headerText] ++ +elementToListItem (Sec headerText subsecs) = [Plain headerText] ++ if null subsecs then [] else [BulletList $ map elementToListItem subsecs] @@ -184,9 +180,8 @@ blockToMarkdown opts (Table caption aligns widths headers rows) = do let makeRow = hsepBlocks . (zipWith alignHeader aligns) . (zipWith docToBlock widthsInChars) let head = makeRow headers' - rows' <- mapM (\row -> do - cols <- mapM (blockListToMarkdown opts) row - return $ makeRow cols) rows + rows' <- mapM (\row -> do cols <- mapM (blockListToMarkdown opts) row + return $ makeRow cols) rows let tableWidth = sum widthsInChars let maxRowHeight = maximum $ map heightOfBlock (head:rows') let isMultilineTable = maxRowHeight > 1 @@ -208,8 +203,7 @@ blockToMarkdown opts (OrderedList attribs items) = do let markers = orderedListMarkers attribs let markers' = map (\m -> if length m < 3 then m ++ replicate (3 - length m) ' ' - else m) - markers + else m) markers contents <- mapM (\(item, num) -> orderedListItemToMarkdown opts item num) $ zip markers' items return $ (vcat contents) <> text "\n" @@ -241,8 +235,8 @@ definitionListItemToMarkdown opts (label, items) = do let tabStop = writerTabStop opts let leader = char ':' contents <- mapM (\item -> blockToMarkdown opts item >>= - (\txt -> return (leader $$ nest tabStop txt))) - items >>= (return . vcat) + (\txt -> return (leader $$ nest tabStop txt))) + items >>= return . vcat return $ labelText $+$ contents -- | Convert list of Pandoc block elements to markdown. @@ -250,29 +244,30 @@ blockListToMarkdown :: WriterOptions -- ^ Options -> [Block] -- ^ List of block elements -> State WriterState Doc blockListToMarkdown opts blocks = - mapM (blockToMarkdown opts) blocks >>= (return . vcat) + mapM (blockToMarkdown opts) blocks >>= return . vcat -- | Get reference for target; if none exists, create unique one and return. -- Prefer label if possible; otherwise, generate a unique key. getReference :: [Inline] -> Target -> State WriterState [Inline] getReference label (src, tit) = do - (_,refs) <- get - case find ((== (src, tit)) . snd) refs of - Just (ref, _) -> return ref - Nothing -> do - let label' = case find ((== label) . fst) refs of - Just _ -> -- label is used; generate numerical label - case find (\n -> not (any (== [Str (show n)]) - (map fst refs))) [1..10000] of - Just x -> [Str (show x)] - Nothing -> error "no unique label" - Nothing -> label - modify (\(notes, refs) -> (notes, (label', (src,tit)):refs)) - return label' + (_,refs) <- get + case find ((== (src, tit)) . snd) refs of + Just (ref, _) -> return ref + Nothing -> do + let label' = case find ((== label) . fst) refs of + Just _ -> -- label is used; generate numerical label + case find (\n -> not (any (== [Str (show n)]) + (map fst refs))) [1..10000] of + Just x -> [Str (show x)] + Nothing -> error "no unique label" + Nothing -> label + modify (\(notes, refs) -> (notes, (label', (src,tit)):refs)) + return label' -- | Convert list of Pandoc inline elements to markdown. inlineListToMarkdown :: WriterOptions -> [Inline] -> State WriterState Doc -inlineListToMarkdown opts lst = mapM (inlineToMarkdown opts) lst >>= (return . hcat) +inlineListToMarkdown opts lst = + mapM (inlineToMarkdown opts) lst >>= return . hcat -- | Convert Pandoc inline element to markdown. inlineToMarkdown :: WriterOptions -> Inline -> State WriterState Doc @@ -327,13 +322,13 @@ inlineToMarkdown opts (Link txt (src, tit)) = do return $ if useAuto then char '<' <> text srcSuffix <> char '>' else if useRefLinks - then let first = char '[' <> linktext <> char ']' - second = if txt == ref - then text "[]" - else char '[' <> reftext <> char ']' - in first <> second - else char '[' <> linktext <> char ']' <> - char '(' <> text src <> linktitle <> char ')' + then let first = char '[' <> linktext <> char ']' + second = if txt == ref + then text "[]" + else char '[' <> reftext <> char ']' + in first <> second + else char '[' <> linktext <> char ']' <> + char '(' <> text src <> linktitle <> char ')' inlineToMarkdown opts (Image alternate (source, tit)) = do let txt = if (null alternate) || (alternate == [Str ""]) || (alternate == [Str source]) -- to prevent autolinks |