From 63a06a87b78f9757e4b219651da348b2edda2c24 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dariusz=20Jarz=C4=99bski?= <dumluregn@gmail.com>
Date: Thu, 19 Dec 2024 12:09:45 +0100
Subject: [PATCH] Add a condition for reenabling the page scroll.

---
 packages/ckeditor5-ui/src/dialog/dialog.ts   |  4 +++-
 packages/ckeditor5-ui/tests/dialog/dialog.js | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/packages/ckeditor5-ui/src/dialog/dialog.ts b/packages/ckeditor5-ui/src/dialog/dialog.ts
index 27a00149f17..fe082dff12a 100644
--- a/packages/ckeditor5-ui/src/dialog/dialog.ts
+++ b/packages/ckeditor5-ui/src/dialog/dialog.ts
@@ -100,7 +100,9 @@ export default class Dialog extends Plugin {
 	public override destroy(): void {
 		super.destroy();
 
-		this._unlockBodyScroll();
+		if ( Dialog._visibleDialogPlugin === this ) {
+			this._unlockBodyScroll();
+		}
 	}
 
 	/**
diff --git a/packages/ckeditor5-ui/tests/dialog/dialog.js b/packages/ckeditor5-ui/tests/dialog/dialog.js
index 171dd03526a..6072356bd12 100644
--- a/packages/ckeditor5-ui/tests/dialog/dialog.js
+++ b/packages/ckeditor5-ui/tests/dialog/dialog.js
@@ -272,6 +272,24 @@ describe( 'Dialog', () => {
 
 			expect( document.documentElement.classList.contains( 'ck-dialog-scroll-locked' ) ).to.be.false;
 		} );
+
+		it( 'should not unlock scrolling on the document if modal was displayed by another plugin instance', () => {
+			const tempDialogPlugin = new Dialog( editor );
+
+			tempDialogPlugin._show( {
+				position: DialogViewPosition.EDITOR_CENTER,
+				isModal: true,
+				className: 'foo'
+			} );
+
+			expect( document.documentElement.classList.contains( 'ck-dialog-scroll-locked' ) ).to.be.true;
+
+			dialogPlugin.destroy();
+
+			expect( document.documentElement.classList.contains( 'ck-dialog-scroll-locked' ) ).to.be.true;
+
+			tempDialogPlugin.destroy();
+		} );
 	} );
 
 	describe( 'show()', () => {