[lexical-markdown] Bug Fix: Fix nested mixed-type list structure during markdown import

packages/lexical-markdown/src/MarkdownTransformers.ts

@@ -282,6 +282,7 @@ const listReplace = (listType: ListType): ElementTransformer['replace'] => {
       firstMatchChar === listMarkerState.parse(firstMatchChar)
         ? firstMatchChar
         : undefined;
+    const indent = getIndent(match[1]);
     if ($isListNode(nextNode) && nextNode.getListType() === listType) {
       if (listMarker) {
         $setState(nextNode, listMarkerState, listMarker);
@@ -303,6 +304,9 @@ const listReplace = (listType: ListType): ElementTransformer['replace'] => {
       }
       previousNode.append(listItem);
       parentNode.remove();
+    } else if (indent > 0 && $isListNode(previousNode)) {
+      previousNode.append(listItem);
+      parentNode.remove();
     } else {
       const list = $createListNode(
         listType,
@@ -318,9 +322,12 @@ const listReplace = (listType: ListType): ElementTransformer['replace'] => {
     if (!isImport) {
       listItem.select(0, 0);
     }
-    const indent = getIndent(match[1]);
     if (indent) {
       listItem.setIndent(indent);
+      const parentList = listItem.getParent();
+      if ($isListNode(parentList) && parentList.getListType() !== listType) {
+        parentList.setListType(listType);
+      }
     }
   };
 };

packages/lexical-markdown/src/__tests__/unit/LexicalMarkdown.test.ts

@@ -354,6 +354,18 @@ describe('Markdown', () => {
       html: '<ol start="25"><li value="25"><span style="white-space: pre-wrap;">Hello</span></li><li value="26"><span style="white-space: pre-wrap;">world</span></li></ol>',
       md: '25. Hello\n26. world',
     },
+    {
+      html: '<ul><li value="1"><span style="white-space: pre-wrap;">bullet1</span></li><li value="2"><ol><li value="1"><span style="white-space: pre-wrap;">ordered1</span></li><li value="2"><span style="white-space: pre-wrap;">ordered2</span></li></ol></li><li value="2"><span style="white-space: pre-wrap;">bullet2</span></li></ul>',
+      md: '- bullet1\n    1. ordered1\n    2. ordered2\n- bullet2',
+    },
+    {
+      html: '<ol><li value="1"><span style="white-space: pre-wrap;">ordered1</span></li><li value="2"><ul><li value="1"><span style="white-space: pre-wrap;">bullet1</span></li><li value="2"><span style="white-space: pre-wrap;">bullet2</span></li></ul></li><li value="2"><span style="white-space: pre-wrap;">ordered2</span></li></ol>',
+      md: '1. ordered1\n    - bullet1\n    - bullet2\n2. ordered2',
+    },
+    {
+      html: '<ul><li value="1"><span style="white-space: pre-wrap;">a</span></li><li value="2"><ol><li value="1"><span style="white-space: pre-wrap;">b</span></li><li value="2"><ul><li value="1"><span style="white-space: pre-wrap;">c</span></li><li value="2"><span style="white-space: pre-wrap;">d</span></li></ul></li><li value="2"><span style="white-space: pre-wrap;">e</span></li></ol></li><li value="2"><span style="white-space: pre-wrap;">f</span></li></ul>',
+      md: '- a\n    1. b\n        - c\n        - d\n    2. e\n- f',
+    },
     {
       html: '<p><i><em style="white-space: pre-wrap;">Hello</em></i><span style="white-space: pre-wrap;"> world</span></p>',
       md: '*Hello* world',