From a793e65560e1faf1865c34f69110497b6d1b3f80 Mon Sep 17 00:00:00 2001
From: Philipinho <16838612+Philipinho@users.noreply.github.com>
Date: Sun, 24 May 2026 12:31:08 +0100
Subject: [PATCH] fix(base): suppress prosemirror dropcursor inside base-embed
 atom

---
 .../editor-ext/src/lib/base-embed/base-embed.ts    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/packages/editor-ext/src/lib/base-embed/base-embed.ts b/packages/editor-ext/src/lib/base-embed/base-embed.ts
index 5c2ab7a07..b4e5f67c8 100644
--- a/packages/editor-ext/src/lib/base-embed/base-embed.ts
+++ b/packages/editor-ext/src/lib/base-embed/base-embed.ts
@@ -27,6 +27,20 @@ export const BaseEmbed = Node.create<BaseEmbedOptions>({
     return { HTMLAttributes: {} };
   },
 
+  // prosemirror-dropcursor draws a block-boundary indicator on every
+  // `dragover` it sees. Pragmatic-dnd (used for column / choice reorder
+  // inside the embed) fires native `dragstart`/`dragover`, which bubble
+  // up to the editor and trigger dropcursor — visible as a stray blue
+  // line above or below the embed during an internal drag. The cursor
+  // event lands over the atom node, so dropcursor consults
+  // `disableDropCursor` on this node spec; returning true suppresses
+  // the indicator while still letting pragmatic-dnd handle the drag.
+  extendNodeSchema(extension) {
+    return extension.name === 'baseEmbed'
+      ? { disableDropCursor: true }
+      : {};
+  },
+
   addAttributes() {
     return {
       pageId: {