From fe77cd3c7f9df1a5ac0a273097f7eb05282e638e Mon Sep 17 00:00:00 2001
From: Mike Schroder <mschrode@umich.edu>
Date: Thu, 1 Jul 2021 22:06:15 +0900
Subject: [PATCH] Block Settings Menu: Disable 'Move to' if there is only one
 block.

---
 .../block-settings-menu/block-settings-dropdown.js          | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/packages/block-editor/src/components/block-settings-menu/block-settings-dropdown.js b/packages/block-editor/src/components/block-settings-menu/block-settings-dropdown.js
index 28cee8dbe0daa3..74c8cf836fe7e9 100644
--- a/packages/block-editor/src/components/block-settings-menu/block-settings-dropdown.js
+++ b/packages/block-editor/src/components/block-settings-menu/block-settings-dropdown.js
@@ -24,6 +24,7 @@ import BlockModeToggle from './block-mode-toggle';
 import BlockHTMLConvertButton from './block-html-convert-button';
 import __unstableBlockSettingsMenuFirstItem from './block-settings-menu-first-item';
 import BlockSettingsMenuControls from '../block-settings-menu-controls';
+import { store as blockEditorStore } from '../../store';
 
 const POPOVER_PROPS = {
 	className: 'block-editor-block-settings-menu__popover',
@@ -45,6 +46,10 @@ export function BlockSettingsDropdown( {
 	const blockClientIds = castArray( clientIds );
 	const count = blockClientIds.length;
 	const firstBlockClientId = blockClientIds[ 0 ];
+	const onlyBlock = useSelect(
+		( select ) => 1 === select( blockEditorStore ).getBlockCount(),
+		[]
+	);
 
 	const shortcuts = useSelect( ( select ) => {
 		const { getShortcutRepresentation } = select( keyboardShortcutsStore );
@@ -154,6 +159,7 @@ export function BlockSettingsDropdown( {
 								{ ! isLocked && (
 									<MenuItem
 										onClick={ flow( onClose, onMoveTo ) }
+										disabled={ onlyBlock }
 									>
 										{ __( 'Move to' ) }
 									</MenuItem>