[MM-55278]: Fixed autofocus on submenu's first element (#29547)

e2e-tests/playwright/tests/accessibility/channels/intro_channel.spec.ts

@@ -129,12 +129,10 @@ test('Post actions tab support', async ({pw, axe}) => {
     // # Press arrow right
     await channelsPage.postDotMenu.remindMenuItem.press('ArrowRight');
 
-    // * Reminder menu should be visible and have focused
-    channelsPage.postReminderMenu.toBeVisible();
-    await expect(channelsPage.postReminderMenu.container).toBeFocused();
+    // * Reminder menu should be visible
+    expect(channelsPage.postReminderMenu.container).toBeVisible();
 
-    // * Should move focus to 30 mins after arrow down
-    await channelsPage.postReminderMenu.container.press('ArrowDown');
+    // * Should have focus on 30 mins after submenu opens
     expect(await channelsPage.postReminderMenu.thirtyMinsMenuItem).toBeFocused();
 
     // * Should move focus to 1 hour after arrow down

webapp/channels/src/components/dot_menu/post_reminder_submenu.tsx

@@ -159,13 +159,16 @@ function PostReminderSubmenu(props: Props) {
             leadingElement={<ClockOutlineIcon size={18}/>}
             trailingElements={<span className={'dot-menu__item-trailing-icon'}><ChevronRightIcon size={16}/></span>}
             menuId={`remind_post_${props.post.id}-menu`}
+            subMenuHeader={
+                <h5 className={'dot-menu__post-reminder-menu-header'}>
+                    {formatMessage(
+                        {
+                            id: 'post_info.post_reminder.sub_menu.header',
+                            defaultMessage: 'Set a reminder for:',
+                        },
+                    )}
+                </h5>}
         >
-            <h5 className={'dot-menu__post-reminder-menu-header'}>
-                {formatMessage(
-                    {id: 'post_info.post_reminder.sub_menu.header',
-                        defaultMessage: 'Set a reminder for:'},
-                )}
-            </h5>
             {postReminderSubMenuItems}
         </Menu.SubMenu>
     );

webapp/channels/src/components/menu/menu.scss

@@ -7,12 +7,13 @@
         min-width: 114px;
         max-width: 496px;
         max-height: 80vh;
+        padding: 4px 0;
         background-color: var(--center-channel-bg);
-        box-shadow: var(--elevation-4);
+        box-shadow: var(--elevation-4), 0 0 0 1px rgba(var(--center-channel-color-rgb), 0.12) inset;
     }
     &.AsSubMenu {
         & .MuiPaper-root {
-            box-shadow: var(--elevation-5);
+            box-shadow: var(--elevation-5), 0 0 0 1px rgba(var(--center-channel-color-rgb), 0.12) inset;
         }
     }
 }

webapp/channels/src/components/menu/menu.test.tsx

@@ -140,7 +140,7 @@ describe('menu click handlers', () => {
             expect(screen.getByText('Open modal from submenu')).toBeInTheDocument();
 
             // Press the down arrow once to focus first submenu item and then twice more to select the one we want
-            userEvent.keyboard('{arrowdown}{arrowdown}{arrowdown}');
+            userEvent.keyboard('{arrowdown}{arrowdown}');
 
             expect(screen.getByText('Open modal from submenu').closest('li')).toHaveFocus();
 

webapp/channels/src/components/menu/menu_item.tsx

@@ -309,6 +309,7 @@ export const MenuItemStyled = styled(MuiMenuItem, {
                     flexWrap: 'nowrap',
                     justifyContent: 'flex-end',
                     color: isRegular ? 'rgba(var(--center-channel-color-rgb), 0.75)' : 'var(--error-text)',
+                    marginInlineStart: '24px',
                     gap: '4px',
                     fontSize: '12px',
                     lineHeight: '16px',

webapp/channels/src/components/menu/sub_menu.tsx

@@ -1,8 +1,8 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 
-import MuiMenu from '@mui/material/Menu';
 import MuiMenuList from '@mui/material/MenuList';
+import MuiPopover from '@mui/material/Popover';
 import type {PopoverOrigin} from '@mui/material/Popover';
 import React, {
     useState,
@@ -33,6 +33,8 @@ import {SubMenuContext, useMenuContextValue} from './menu_context';
 import {MenuItem} from './menu_item';
 import type {Props as MenuItemProps} from './menu_item';
 
+import './menu.scss';
+
 interface Props {
     id: MenuItemProps['id'];
     leadingElement?: MenuItemProps['leadingElement'];
@@ -47,6 +49,7 @@ interface Props {
     menuAriaDescribedBy?: string;
     forceOpenOnLeft?: boolean; // Most of the times this is not needed, since submenu position is calculated and placed
 
+    subMenuHeader?: ReactNode;
     children: ReactNode;
 }
 
@@ -63,6 +66,7 @@ export function SubMenu(props: Props) {
         menuAriaDescribedBy,
         forceOpenOnLeft,
         children,
+        subMenuHeader,
         ...rest
     } = props;
 
@@ -136,6 +140,7 @@ export function SubMenu(props: Props) {
                 menuId,
                 menuAriaLabel,
                 children,
+                subMenuHeader,
             },
         }));
     }
@@ -166,35 +171,30 @@ export function SubMenu(props: Props) {
             onMouseLeave={handleMouseLeave}
             onKeyDown={handleKeyDown}
         >
-            <MuiMenu
-                anchorEl={anchorElement}
-                open={isSubMenuOpen}
-                anchorOrigin={originOfAnchorAndTransform.anchorOrigin}
-                transformOrigin={originOfAnchorAndTransform.transformOrigin}
-                sx={{pointerEvents: 'none'}}
-                className='menu_menuStyled AsSubMenu'
-            >
-                {/* This component is needed here to re enable pointer events for the submenu items which we had to disable above as */}
-                {/* pointer turns to default as soon as it leaves the parent menu */}
-                {/* Notice we dont use the below component in menu.tsx  */}
-                <MuiMenuList
-                    id={menuId}
-                    component='ul'
-                    aria-label={menuAriaLabel}
-                    aria-describedby={menuAriaDescribedBy}
-                    className={A11yClassNames.POPUP}
-                    onKeyDown={handleSubMenuKeyDown}
-                    sx={{
-                        pointerEvents: 'auto', // reset pointer events to default from here on
-                        paddingTop: 0,
-                        paddingBottom: 0,
-                    }}
+            <SubMenuContext.Provider value={providerValue}>
+                <MuiPopover
+                    anchorEl={anchorElement}
+                    open={isSubMenuOpen}
+                    anchorOrigin={originOfAnchorAndTransform.anchorOrigin}
+                    transformOrigin={originOfAnchorAndTransform.transformOrigin}
+                    className='menu_menuStyled AsSubMenu'
                 >
-                    <SubMenuContext.Provider value={providerValue}>
+                    {subMenuHeader}
+                    <MuiMenuList
+                        id={menuId}
+                        aria-label={menuAriaLabel}
+                        aria-describedby={menuAriaDescribedBy}
+                        className={A11yClassNames.POPUP}
+                        onKeyDown={handleSubMenuKeyDown}
+                        autoFocusItem={isSubMenuOpen}
+                        sx={{
+                            py: 0,
+                        }}
+                    >
                         {children}
-                    </SubMenuContext.Provider>
-                </MuiMenuList>
-            </MuiMenu>
+                    </MuiMenuList>
+                </MuiPopover>
+            </SubMenuContext.Provider>
         </MenuItem>
     );
 }
@@ -203,6 +203,7 @@ interface SubMenuModalProps {
     menuId: Props['menuId'];
     menuAriaLabel?: Props['menuAriaLabel'];
     children: Props['children'];
+    subMenuHeader?: ReactNode;
 }
 
 function SubMenuModal(props: SubMenuModalProps) {
@@ -224,9 +225,11 @@ function SubMenuModal(props: SubMenuModalProps) {
                 className='menuModal'
             >
                 <MuiMenuList
+                    component={'div'}
                     aria-hidden={true}
                     onClick={handleModalClose}
                 >
+                    {props.subMenuHeader}
                     {props.children}
                 </MuiMenuList>
             </GenericModal>

webapp/channels/src/components/user_account_menu/__snapshots__/user_account_name_menuitem.test.tsx.snap

@@ -4,7 +4,7 @@ exports[`UserAccountNameMenuItem should not break if no props are passed 1`] = `
 <div>
   <li
     aria-haspopup="true"
-    class="MuiButtonBase-root-JvZdr dKFJFs MuiButtonBase-root MuiMenuItem-root MuiMenuItem-gutters MuiMenuItem-root-dXqYNm kIRdVO MuiMenuItem-root MuiMenuItem-gutters sc-gswNZR cUFZeQ userAccountMenu_nameMenuItem"
+    class="MuiButtonBase-root-JvZdr dKFJFs MuiButtonBase-root MuiMenuItem-root MuiMenuItem-gutters MuiMenuItem-root-dXqYNm kIRdVO MuiMenuItem-root MuiMenuItem-gutters sc-gswNZR jjvBbU userAccountMenu_nameMenuItem"
     role="menuitem"
     tabindex="-1"
   >

webapp/channels/src/components/user_account_menu/user_account_dnd_menuitem.tsx

@@ -196,20 +196,21 @@ export default function UserAccountDndMenuItem(props: Props) {
                     </span>
                 </>
             }
-            role='menuitemradio' // Prevents menu item from closing, not a recommended solution
             aria-checked={props.isStatusDnd}
             trailingElements={trailingElement}
+            subMenuHeader={
+                <h5
+                    id='userAccountMenu_dndSubMenuTitle'
+                    className='userAccountMenu_dndMenuItem_subMenuTitle'
+                    aria-hidden={true}
+                >
+                    {formatMessage({
+                        id: 'userAccountMenu.dndSubMenu.title',
+                        defaultMessage: 'Clear after:',
+                    })}
+                </h5>
+            }
         >
-            <h5
-                id='userAccountMenu_dndSubMenuTitle'
-                className='userAccountMenu_dndMenuItem_subMenuTitle'
-                aria-hidden={true}
-            >
-                {formatMessage({
-                    id: 'userAccountMenu.dndSubMenu.title',
-                    defaultMessage: 'Clear after:',
-                })}
-            </h5>
             <Menu.Item
                 id={DND_SUB_MENU_ITEMS_IDS.DO_NOT_CLEAR}
                 labels={