Implement block quotes and lists

CHANGELOG.md

@@ -6,6 +6,10 @@
 * Added `scannerM` in `Text.MMark.Extension` and `runScannerM` in
   `Text.MMark`.
 
+* Added support for block quotes.
+
+* Added support for unordered and ordered lists.
+
 ## MMark 0.0.1.1
 
 * Fixed a bug in skipping of headers (only one newline after the header line

README.md

@@ -174,15 +174,23 @@ do, the closing `*` won't be in right-flanking position anymore. God dammit.
 
 Block-level parsing:
 
-* Headings, thematic breaks, code blocks should be separated from paragraphs
-  by at least one empty line. This makes the parser a lot simpler and forces
-  markdown sources to be in a more readable form too.
+* Code blocks and thematic breaks should be separated from paragraphs and
+  lists by at least one empty line.
 * If a line starts with hash signs it is expected to be a valid *non-empty*
   header (level 1–6 inclusive). If you want to start a paragraph with
   hashes, just escape the first hash with backslash and that will be enough.
 * Setext headings are not supported for the sake of simplicity.
 * Fenced code blocks must be explicitly closed by a closing fence. They are
   not closed by the end of document or by start of another block.
+* Lists and block quotes are defined by column at which their content
+  starts. Content belonging to a particular list or block quote should start
+  at the same column (or greater column, up to the column where indented
+  code blocks start).
+* Block quotes are started by a single `>` character, it's not necessary to
+  put a `>` character at beginning of every line belonging to a quote (in
+  fact, this would make every line a separate block quote).
+* Paragraphs can be interrupted by unordered list and ordered lists with any
+  valid starting index.
 
 Inline-level parsing:
 
@@ -202,8 +210,6 @@ Inline-level parsing:
 Not-yet-implemented things:
 
 * Separate declaration of image's source and title is not (yet?) supported.
-* Blockquotes are not implemented yet.
-* Lists (unordered and ordered) are not implemented yet.
 * Reference links are not implemented yet.
 * HTML blocks are not implemented yet.
 * HTML inlines are not implemented yet.

Text/MMark/Internal.hs

@@ -164,8 +164,8 @@ data Block a
     -- ^ Paragraph, leaf block
   | Blockquote [Block a]
     -- ^ Blockquote container block
-  | OrderedList (NonEmpty [Block a])
-    -- ^ Ordered list, container block
+  | OrderedList Word (NonEmpty [Block a])
+    -- ^ Ordered list ('Word' is the start index), container block
   | UnorderedList (NonEmpty [Block a])
     -- ^ Unordered list, container block
   | Naked a
@@ -336,24 +336,26 @@ defaultBlockRender = \case
     newline
   Paragraph (_,html) ->
     p_ html >> newline
-  Blockquote blocks ->
-    blockquote_ (mapM_ defaultBlockRender blocks)
-  OrderedList items -> do
-    ol_ $ do
+  Blockquote blocks -> do
+    blockquote_ (newline <* mapM_ defaultBlockRender blocks)
+    newline
+  OrderedList i items -> do
+    let startIndex = [start_ (T.pack $ show i) | i /= 1]
+    ol_ startIndex $ do
       newline
       forM_ items $ \x -> do
-        li_ (mapM_ defaultBlockRender x)
+        li_ (newline <* mapM_ defaultBlockRender x)
         newline
     newline
   UnorderedList items -> do
     ul_ $ do
       newline
       forM_ items $ \x -> do
-        li_ (mapM_ defaultBlockRender x)
+        li_ (newline <* mapM_ defaultBlockRender x)
         newline
     newline
   Naked (_,html) ->
-    html
+    html >> newline
   where
     mkId (Ois x) = [id_ (headerId x)]