1 files changed, 60 insertions, 0 deletions
diff --git a/src/mistune/renderers/_list.py b/src/mistune/renderers/_list.py
new file mode 100644
index 0000000..0a18639
--- /dev/null
+++ b/src/mistune/renderers/_list.py
@@ -0,0 +1,60 @@
+from ..util import strip_end
+
+
+def render_list(renderer, token, state) -> str:
+    attrs = token['attrs']
+    if attrs['ordered']:
+        children = _render_ordered_list(renderer, token, state)
+    else:
+        children = _render_unordered_list(renderer, token, state)
+
+    text = ''.join(children)
+    parent = token.get('parent')
+    if parent:
+        if parent['tight']:
+            return text
+        return text + '\n'
+    return strip_end(text) + '\n'
+
+
+def _render_list_item(renderer, parent, item, state):
+    leading = parent['leading']
+    text = ''
+    for tok in item['children']:
+        if tok['type'] == 'list':
+            tok['parent'] = parent
+        elif tok['type'] == 'blank_line':
+            continue
+        text += renderer.render_token(tok, state)
+
+    lines = text.splitlines()
+    text = lines[0] + '\n'
+    prefix = ' ' * len(leading)
+    for line in lines[1:]:
+        if line:
+            text += prefix + line + '\n'
+        else:
+            text += '\n'
+    return leading + text
+
+
+def _render_ordered_list(renderer, token, state):
+    attrs = token['attrs']
+    start = attrs.get('start', 1)
+    for item in token['children']:
+        leading = str(start) + token['bullet'] + ' '
+        parent = {
+            'leading': leading,
+            'tight': token['tight'],
+        }
+        yield _render_list_item(renderer, parent, item, state)
+        start += 1
+
+
+def _render_unordered_list(renderer, token, state):
+    parent = {
+        'leading': token['bullet'] + ' ',
+        'tight': token['tight'],
+    }
+    for item in token['children']:
+        yield _render_list_item(renderer, parent, item, state)