planning

node_modules/mdast-util-to-markdown/lib/join.js

@@ -0,0 +1,37 @@
+module.exports = [joinDefaults]
+
+var formatCodeAsIndented = require('./util/format-code-as-indented')
+var formatHeadingAsSetext = require('./util/format-heading-as-setext')
+
+function joinDefaults(left, right, parent, context) {
+  if (
+    // Two lists with the same marker.
+    (right.type === 'list' &&
+      right.type === left.type &&
+      Boolean(left.ordered) === Boolean(right.ordered)) ||
+    // Indented code after list or another indented code.
+    (right.type === 'code' &&
+      formatCodeAsIndented(right, context) &&
+      (left.type === 'list' ||
+        (left.type === right.type && formatCodeAsIndented(left, context))))
+  ) {
+    return false
+  }
+
+  // Join children of a list or an item.
+  // In which case, `parent` has a `spread` field.
+  if (typeof parent.spread === 'boolean') {
+    if (
+      left.type === 'paragraph' &&
+      // Two paragraphs.
+      (left.type === right.type ||
+        right.type === 'definition' ||
+        // Paragraph followed by a setext heading.
+        (right.type === 'heading' && formatHeadingAsSetext(right, context)))
+    ) {
+      return
+    }
+
+    return parent.spread ? 1 : 0
+  }
+}