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-rw-r--r--src/Text/Pandoc/Writers/Markdown.hs38
-rw-r--r--tests/writer.markdown11
2 files changed, 37 insertions, 12 deletions
diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs
index d37146346..d8ac99685 100644
--- a/src/Text/Pandoc/Writers/Markdown.hs
+++ b/src/Text/Pandoc/Writers/Markdown.hs
@@ -46,6 +46,10 @@ import Text.Pandoc.Readers.TeXMath (readTeXMath)
import Text.HTML.TagSoup (renderTags, parseTags, isTagText, Tag(..))
import Network.URI (isAbsoluteURI)
import Data.Default
+import Data.Yaml (Value(Object,String,Array,Bool,Number))
+import qualified Data.HashMap.Strict as H
+import qualified Data.Vector as V
+import qualified Data.Text as T
type Notes = [[Block]]
type Refs = [([Inline], Target)]
@@ -109,16 +113,42 @@ plainTitleBlock tit auths dat =
(hcat (intersperse (text "; ") auths)) <> cr <>
dat <> cr
+yamlTitleBlock :: Value -> Doc
+yamlTitleBlock v = "---" $$ (jsonToYaml v) $$ "..."
+
+jsonToYaml :: Value -> Doc
+jsonToYaml (Object hashmap) =
+ vcat (map (\(k,v) ->
+ text (T.unpack k) <> ":" <> space <> jsonToYaml v) $ H.toList hashmap)
+jsonToYaml (Array vec) =
+ cr <> vcat (map (\v -> hang 2 "- " (jsonToYaml v)) $ V.toList vec)
+jsonToYaml (String s)
+ | "\n" `T.isInfixOf` s = hang 2 ("|" <> cr) $ text $ T.unpack s
+ | otherwise = text $ "'" ++ substitute "'" "''" (T.unpack s) ++ "'"
+jsonToYaml (Bool b) = text $ show b
+jsonToYaml (Number n) = text $ show n
+jsonToYaml _ = empty
+
-- | Return markdown representation of document.
pandocToMarkdown :: WriterOptions -> Pandoc -> State WriterState String
pandocToMarkdown opts (Pandoc meta blocks) = do
title' <- inlineListToMarkdown opts $ docTitle meta
authors' <- mapM (inlineListToMarkdown opts) $ docAuthors meta
date' <- inlineListToMarkdown opts $ docDate meta
+ let colwidth = if writerWrapText opts
+ then Just $ writerColumns opts
+ else Nothing
+ metadata <- metaToJSON
+ (fmap (render colwidth) . blockListToMarkdown opts)
+ (fmap (render colwidth) . inlineListToMarkdown opts)
+ (writerVariables opts)
+ meta
isPlain <- gets stPlain
let titleblock = case True of
_ | isPlain ->
plainTitleBlock title' authors' date'
+ | isEnabled Ext_yaml_title_block opts ->
+ yamlTitleBlock metadata
| isEnabled Ext_pandoc_title_block opts ->
pandocTitleBlock title' authors' date'
| isEnabled Ext_mmd_title_block opts ->
@@ -128,14 +158,6 @@ pandocToMarkdown opts (Pandoc meta blocks) = do
let toc = if writerTableOfContents opts
then tableOfContents opts headerBlocks
else empty
- let colwidth = if writerWrapText opts
- then Just $ writerColumns opts
- else Nothing
- metadata <- metaToJSON
- (fmap (render colwidth) . blockListToMarkdown opts)
- (fmap (render colwidth) . inlineListToMarkdown opts)
- (writerVariables opts)
- meta
body <- blockListToMarkdown opts blocks
st <- get
notes' <- notesToMarkdown opts (reverse $ stNotes st)
diff --git a/tests/writer.markdown b/tests/writer.markdown
index d9cc076f5..e8aca9954 100644
--- a/tests/writer.markdown
+++ b/tests/writer.markdown
@@ -1,7 +1,10 @@
-% Pandoc Test Suite
-% John MacFarlane
- Anonymous
-% July 17, 2006
+---
+title: 'Pandoc Test Suite'
+author:
+- 'John MacFarlane'
+- 'Anonymous'
+date: 'July 17, 2006'
+...
This is a set of tests for pandoc. Most of them are adapted from John Gruber’s
markdown test suite.