From b95980f4b54c7d8b17223b4f9db27e29103c5a23 Mon Sep 17 00:00:00 2001
From: Daniel <845765@qq.com>
Date: Wed, 25 Oct 2023 21:59:36 +0800
Subject: [PATCH] :art: When exporting Markdown, `<br />` nodes in non-tables
 are replaced with `\n` text nodes
 https://github.com/siyuan-note/siyuan/issues/9509

---
 kernel/model/export.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/kernel/model/export.go b/kernel/model/export.go
index 863f26426..b17c6b3de 100644
--- a/kernel/model/export.go
+++ b/kernel/model/export.go
@@ -1525,6 +1525,25 @@ func exportMarkdownContent0(tree *parse.Tree, cloudAssetsBase string, assetsDest
 		})
 	}
 
+	// When exporting Markdown, `<br />` nodes in non-tables are replaced with `\n` text nodes https://github.com/siyuan-note/siyuan/issues/9509
+	var unlinks []*ast.Node
+	ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
+		if !entering {
+			return ast.WalkContinue
+		}
+
+		if ast.NodeBr == n.Type {
+			if !n.ParentIs(ast.NodeTableCell) {
+				n.InsertBefore(&ast.Node{Type: ast.NodeText, Tokens: []byte("\n")})
+				unlinks = append(unlinks, n)
+			}
+		}
+		return ast.WalkContinue
+	})
+	for _, unlink := range unlinks {
+		unlink.Unlink()
+	}
+
 	renderer := render.NewProtyleExportMdRenderer(tree, luteEngine.RenderOptions)
 	ret = gulu.Str.FromBytes(renderer.Render())
 	return