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Markdown writer: Support Ext_auto_identifiers and Ext_header_attributes.

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This commit is contained in:
John MacFarlane 2013-01-12 22:43:25 -08:00
parent c8022f0419
commit 15829d5c3a
1 changed files with 23 additions and 13 deletions
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36
src/Text/Pandoc/Writers/Markdown.hs
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@ -44,12 +44,16 @@ import qualified Data.Set as Set
import Text.Pandoc.Writers.HTML (writeHtmlString)
import Text.Pandoc.Readers.TeXMath (readTeXMath)
import Text.HTML.TagSoup (renderTags, parseTags, isTagText, Tag(..))
import Data.Default
type Notes = [[Block]]
type Refs = [([Inline], Target)]
data WriterState = WriterState { stNotes :: Notes
, stRefs :: Refs
, stRefs :: Refs
, stIds :: [String]
, stPlain :: Bool }
instance Default WriterState
where def = WriterState{ stNotes = [], stRefs = [], stIds = [], stPlain = False }
-- | Convert Pandoc to Markdown.
writeMarkdown :: WriterOptions -> Pandoc -> String
@ -57,9 +61,7 @@ writeMarkdown opts document =
evalState (pandocToMarkdown opts{
writerWrapText = writerWrapText opts &&
not (isEnabled Ext_hard_line_breaks opts) }
document) WriterState{ stNotes = []
, stRefs = []
, stPlain = False }
document) def
-- | Convert Pandoc to plain text (like markdown, but without links,
-- pictures, or inline formatting).
@ -68,9 +70,7 @@ writePlain opts document =
evalState (pandocToMarkdown opts{
writerExtensions = Set.delete Ext_escaped_line_breaks $
writerExtensions opts }
document') WriterState{ stNotes = []
, stRefs = []
, stPlain = True }
document') def{ stPlain = True }
where document' = plainify document
plainify :: Pandoc -> Pandoc
@ -196,9 +196,7 @@ tableOfContents :: WriterOptions -> [Block] -> Doc
tableOfContents opts headers =
let opts' = opts { writerIgnoreNotes = True }
contents = BulletList $ map (elementToListItem opts) $ hierarchicalize headers
in evalState (blockToMarkdown opts' contents) WriterState{ stNotes = []
, stRefs = []
, stPlain = False }
in evalState (blockToMarkdown opts' contents) def
-- | Converts an Element to a list item for a table of contents,
elementToListItem :: WriterOptions -> Element -> [Block]
@ -275,21 +273,33 @@ blockToMarkdown _ (RawBlock _ _) = return empty
blockToMarkdown _ HorizontalRule =
return $ blankline <> text "* * * * *" <> blankline
blockToMarkdown opts (Header level attr inlines) = do
-- we calculate the id that would be used by auto_identifiers
-- so we know whether to print an explicit identifier
ids <- gets stIds
let autoId = uniqueIdent inlines ids
modify $ \st -> st{ stIds = autoId : ids }
let attr' = case attr of
("",[],[]) -> empty
(id',[],[]) | isEnabled Ext_auto_identifiers opts
&& id' == autoId -> empty
_ | isEnabled Ext_header_attributes opts ->
space <> attrsToMarkdown attr
| otherwise -> empty
contents <- inlineListToMarkdown opts inlines
st <- get
let setext = writerSetextHeaders opts
return $ nowrap
$ case level of
1 | setext ->
contents <> cr <> text (replicate (offset contents) '=') <>
contents <> attr' <> cr <> text (replicate (offset contents) '=') <>
blankline
2 | setext ->
contents <> cr <> text (replicate (offset contents) '-') <>
contents <> attr' <> cr <> text (replicate (offset contents) '-') <>
blankline
-- ghc interprets '#' characters in column 1 as linenum specifiers.
_ | stPlain st || isEnabled Ext_literate_haskell opts ->
contents <> blankline
_ -> text (replicate level '#') <> space <> contents <> blankline
_ -> text (replicate level '#') <> space <> contents <> attr' <> blankline
blockToMarkdown opts (CodeBlock (_,classes,_) str)
| "haskell" `elem` classes && "literate" `elem` classes &&
isEnabled Ext_literate_haskell opts =