feat: Add oneLine mode to AsyncSelect

superset-frontend/src/components/Select/AsyncSelect.stories.tsx

@@ -123,6 +123,15 @@ const ARG_TYPES = {
       By default label and value.
     `,
   },
+  oneLine: {
+    defaultValue: false,
+    description: `Sets maxTagCount to 1. The overflow tag is always displayed in
+       the same line, line wrapping is disabled.
+       When the dropdown is open, sets maxTagCount to 0,
+       displays only the overflow tag.
+       Requires '"mode=multiple"'.
+     `,
+  },
 };
 
 const USERS = [

superset-frontend/src/components/Select/AsyncSelect.test.tsx

@@ -756,6 +756,54 @@ test('finds an element with a numeric value and does not duplicate the options',
   expect(await querySelectOption('11')).not.toBeInTheDocument();
 });
 
+test('Renders only 1 tag and an overflow tag in oneLine mode', () => {
+  render(
+    <AsyncSelect
+      {...defaultProps}
+      value={[OPTIONS[0], OPTIONS[1], OPTIONS[2]]}
+      mode="multiple"
+      oneLine
+    />,
+  );
+  expect(screen.getByText(OPTIONS[0].label)).toBeVisible();
+  expect(screen.queryByText(OPTIONS[1].label)).not.toBeInTheDocument();
+  expect(screen.queryByText(OPTIONS[2].label)).not.toBeInTheDocument();
+  expect(screen.getByText('+ 2 ...')).toBeVisible();
+});
+
+test('Renders only an overflow tag if dropdown is open in oneLine mode', async () => {
+  render(
+    <AsyncSelect
+      {...defaultProps}
+      value={[OPTIONS[0], OPTIONS[1], OPTIONS[2]]}
+      mode="multiple"
+      oneLine
+    />,
+  );
+  await open();
+
+  const withinSelector = within(getElementByClassName('.ant-select-selector'));
+  await waitFor(() => {
+    expect(
+      withinSelector.queryByText(OPTIONS[0].label),
+    ).not.toBeInTheDocument();
+    expect(
+      withinSelector.queryByText(OPTIONS[1].label),
+    ).not.toBeInTheDocument();
+    expect(
+      withinSelector.queryByText(OPTIONS[2].label),
+    ).not.toBeInTheDocument();
+    expect(withinSelector.getByText('+ 3 ...')).toBeVisible();
+  });
+
+  await type('{esc}');
+
+  expect(await withinSelector.findByText(OPTIONS[0].label)).toBeVisible();
+  expect(withinSelector.queryByText(OPTIONS[1].label)).not.toBeInTheDocument();
+  expect(withinSelector.queryByText(OPTIONS[2].label)).not.toBeInTheDocument();
+  expect(withinSelector.getByText('+ 2 ...')).toBeVisible();
+});
+
 /*
  TODO: Add tests that require scroll interaction. Needs further investigation.
  - Fetches more data when scrolling and more data is available

superset-frontend/src/components/Select/AsyncSelect.tsx

@@ -71,6 +71,7 @@ import {
   TOKEN_SEPARATORS,
   DEFAULT_SORT_COMPARATOR,
 } from './constants';
+import { oneLineTagRender } from './CustomTag';
 
 const Error = ({ error }: { error: string }) => (
   <StyledError>
@@ -125,6 +126,8 @@ const AsyncSelect = forwardRef(
       tokenSeparators,
       value,
       getPopupContainer,
+      oneLine,
+      maxTagCount: propsMaxTagCount,
       ...props
     }: AsyncSelectProps,
     ref: RefObject<AsyncSelectRef>,
@@ -148,6 +151,16 @@ const AsyncSelect = forwardRef(
       : 'multiple';
     const allowFetch = !fetchOnlyOnSearch || inputValue;
 
+    const [maxTagCount, setMaxTagCount] = useState(
+      propsMaxTagCount ?? MAX_TAG_COUNT,
+    );
+
+    useEffect(() => {
+      if (oneLine) {
+        setMaxTagCount(isDropdownVisible ? 0 : 1);
+      }
+    }, [isDropdownVisible, oneLine]);
+
     useEffect(() => {
       selectValueRef.current = selectValue;
     }, [selectValue]);
@@ -487,7 +500,7 @@ const AsyncSelect = forwardRef(
           }
           headerPosition={headerPosition}
           labelInValue
-          maxTagCount={MAX_TAG_COUNT}
+          maxTagCount={maxTagCount}
           mode={mappedMode}
           notFoundContent={isLoading ? t('Loading...') : notFoundContent}
           onDeselect={handleOnDeselect}
@@ -513,6 +526,8 @@ const AsyncSelect = forwardRef(
               <StyledCheckOutlined iconSize="m" />
             )
           }
+          oneLine={oneLine}
+          tagRender={oneLine ? oneLineTagRender : undefined}
           {...props}
           ref={ref}
         >