From c5280cd056c0f45498278158954f8667ed1b7f8a Mon Sep 17 00:00:00 2001
From: Henrik Giesel <hengiesel@gmail.com>
Date: Fri, 4 Feb 2022 09:40:50 +0100
Subject: [PATCH] Fix CodeMirror retaining history of unrelated notes (#1640)

---
 ts/editor/NoteEditor.svelte | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ts/editor/NoteEditor.svelte b/ts/editor/NoteEditor.svelte
index 0b5abf23e..f84af9c29 100644
--- a/ts/editor/NoteEditor.svelte
+++ b/ts/editor/NoteEditor.svelte
@@ -147,6 +147,11 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     let noteId: number | null = null;
     export function setNoteId(ntid: number): void {
+        // TODO this is a hack, because it requires the NoteEditor to know implementation details of the PlainTextInput.
+        // It should be refactored once we work on our own Undo stack
+        for (const pi of plainTextInputs) {
+            pi.api.getEditor().clearHistory();
+        }
         noteId = ntid;
     }