planning

node_modules/remark-stringify/lib/macro/block.js

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+'use strict'
+
+module.exports = block
+
+var lineFeed = '\n'
+
+var blank = lineFeed + lineFeed
+var triple = blank + lineFeed
+var comment = blank + '<!---->' + blank
+
+// Stringify a block node with block children (e.g., `root` or `blockquote`).
+// Knows about code following a list, or adjacent lists with similar bullets,
+// and places an extra line feed between them.
+function block(node) {
+  var self = this
+  var options = self.options
+  var fences = options.fences
+  var gap = options.commonmark ? comment : triple
+  var values = []
+  var children = node.children
+  var length = children.length
+  var index = -1
+  var prev
+  var child
+
+  while (++index < length) {
+    prev = child
+    child = children[index]
+
+    if (prev) {
+      // A list preceding another list that are equally ordered, or a
+      // list preceding an indented code block, need a gap between them,
+      // so as not to see them as one list, or content of the list,
+      // respectively.
+      //
+      // In commonmark, only something that breaks both up can do that,
+      // so we opt for an empty, invisible comment.  In other flavours,
+      // two blank lines are fine.
+      if (
+        prev.type === 'list' &&
+        ((child.type === 'list' && prev.ordered === child.ordered) ||
+          (child.type === 'code' && (!child.lang && !fences)))
+      ) {
+        values.push(gap)
+      } else {
+        values.push(blank)
+      }
+    }
+
+    values.push(self.visit(child, node))
+  }
+
+  return values.join('')
+}