feat: add dropdown-indicators Lumo variant to menu-bar button (#7381)

packages/menu-bar/test/visual/lumo/menu-bar.test.js

@@ -165,6 +165,71 @@ describe('menu-bar', () => {
           await visualDiff(document.body, `${dir}-end-aligned-overflow-button`);
         });
       });
+
+      describe('dropdown-indicators', () => {
+        function makeIcon(img) {
+          const icon = document.createElement('vaadin-icon');
+          icon.setAttribute('icon', img);
+          return icon;
+        }
+
+        beforeEach(async () => {
+          div = document.createElement('div');
+          div.style.padding = '10px';
+
+          element = fixtureSync('<vaadin-menu-bar></vaadin-menu-bar>', div);
+          await nextRender();
+
+          element.items = [
+            { text: 'Home' },
+            {
+              text: 'Actions',
+              children: [{ text: 'Notifications' }, { text: 'Mark as read' }],
+            },
+            { text: 'Manage' },
+            {
+              text: 'Reports',
+              children: [{ text: 'View Reports' }, { text: 'Generate Report' }],
+            },
+            { text: 'Help' },
+          ];
+        });
+
+        it('dropdown-indicators', async () => {
+          div.style.width = '300px';
+          element.setAttribute('theme', 'dropdown-indicators');
+          await visualDiff(div, `${dir}-dropdown-indicators`);
+        });
+
+        it('dropdown-indicators small', async () => {
+          div.style.width = '250px';
+          element.setAttribute('theme', 'dropdown-indicators small');
+          await visualDiff(div, `${dir}-dropdown-indicators-small`);
+        });
+
+        it('dropdown-indicators tertiary', async () => {
+          div.style.width = '200px';
+          element.setAttribute('theme', 'dropdown-indicators tertiary');
+          await visualDiff(div, `${dir}-dropdown-indicators-tertiary`);
+        });
+
+        it('dropdown-indicators tertiary-inline', async () => {
+          div.style.width = '200px';
+          element.setAttribute('theme', 'dropdown-indicators tertiary-inline');
+          await visualDiff(div, `${dir}-dropdown-indicators-tertiary-inline`);
+        });
+
+        it('dropdown-indicators icon', async () => {
+          element.setAttribute('theme', 'dropdown-indicators');
+          const items = [...element.items];
+          items[1].text = null;
+          items[1].component = makeIcon('lumo:chevron-down');
+          items[1].theme = 'dropdown-indicators icon';
+          element.items = items;
+          await nextRender();
+          await visualDiff(div, `${dir}-dropdown-indicators-icon`);
+        });
+      });
     });
   });
 });

packages/menu-bar/theme/lumo/vaadin-menu-bar-button-styles.js

@@ -79,6 +79,32 @@ const menuBarButton = css`
     margin-right: 0;
   }
 
+  :host([theme~='dropdown-indicators']:not([slot='overflow']):not([theme~='icon'])[aria-haspopup]) [part='suffix'] {
+    margin-inline-start: 0;
+    width: 1em;
+    height: 1em;
+    line-height: 1;
+    font-size: var(--lumo-icon-size-s);
+    position: relative;
+    inset-inline-start: 0.15em;
+  }
+
+  /* prettier-ignore */
+  :host([theme~='dropdown-indicators']:not([slot='overflow']):not([theme~='icon'])[aria-haspopup]) [part='suffix']::after {
+    font-family: lumo-icons;
+    content: var(--lumo-icons-dropdown);
+  }
+
+  /* prettier-ignore */
+  :host([theme~='dropdown-indicators']:not([slot='overflow']):not([theme~='icon'])[theme~='tertiary'][aria-haspopup]) [part='suffix'] {
+    inset-inline-start: 0.05em;
+  }
+
+  /* prettier-ignore */
+  :host([theme~='dropdown-indicators']:not([slot='overflow']):not([theme~='icon'])[theme~='tertiary-inline'][aria-haspopup]) [part='suffix'] {
+    inset-inline-start: 0;
+  }
+
   /* RTL styles */
   :host([dir='rtl']) {
     margin-left: calc(var(--lumo-space-xs) / 2);