From 9d281e9e998a5cfa9ca1002ad428caf1cee59682 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philipp=20Ku=CC=88hn?= <kontakt@philipp-kuehn.com>
Date: Sun, 10 Oct 2021 19:25:47 +0200
Subject: [PATCH] fix: do not apply paste rules for ProseMirror HTML

---
 packages/core/src/PasteRule.ts | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/PasteRule.ts b/packages/core/src/PasteRule.ts
index 54b60efa4..981a8ab7d 100644
--- a/packages/core/src/PasteRule.ts
+++ b/packages/core/src/PasteRule.ts
@@ -127,12 +127,23 @@ function run(config: {
  * action.
  */
 export function pasteRulesPlugin(rules: PasteRule[]): Plugin {
+  let isProseMirrorHTML = false
+
   const plugin = new Plugin({
+    props: {
+      handlePaste: (view, event) => {
+        const html = event.clipboardData?.getData('text/html')
+
+        isProseMirrorHTML = !!html?.includes('data-pm-slice')
+
+        return false
+      },
+    },
     appendTransaction: (transactions, oldState, state) => {
       const transaction = transactions[0]
 
       // stop if there is not a paste event
-      if (!transaction.getMeta('paste')) {
+      if (!transaction.getMeta('paste') || isProseMirrorHTML) {
         return
       }