fix: filterable multiselect readonly state implemented

packages/react/src/components/ListBox/next/ListBoxSelection.tsx

@@ -32,6 +32,7 @@ const defaultTranslations: Record<TranslationKey, string> = {
 function defaultTranslateWithId(id: TranslationKey): string {
   return defaultTranslations[id];
 }
+
 export interface ListBoxSelectionProps {
   /**
    * Specify a function to be invoked when a user interacts with the clear
@@ -57,6 +58,11 @@ export interface ListBoxSelectionProps {
    * Specify whether or not the clear selection element should be disabled
    */
   disabled?: boolean;
+  /**
+   * Whether or not the listbox is readonly
+   */
+  readOnly?: boolean;
+
   /**
    * Specify an optional `onClearSelection` handler that is called when the underlying
    * element is cleared
@@ -86,6 +92,7 @@ function ListBoxSelection({
   selectionCount,
   translateWithId: t = defaultTranslateWithId,
   disabled,
+  readOnly,
   onClearSelection,
   ...rest
 }: ListBoxSelectionProps) {
@@ -106,7 +113,7 @@ function ListBoxSelection({
 
   function onClick(event: React.MouseEvent<HTMLButtonElement, MouseEvent>) {
     event.stopPropagation();
-    if (disabled) {
+    if (disabled || readOnly) {
       return;
     }
     clearSelection(event);
@@ -126,11 +133,12 @@ function ListBoxSelection({
         <button
           aria-label={description}
           className={`${prefix}--tag__close-icon`}
-          disabled={disabled}
+          disabled={disabled || readOnly}
           onClick={onClick}
           tabIndex={-1}
           title={description}
-          type="button">
+          type="button"
+          aria-disabled={readOnly ? true : undefined}>
           <Close />
         </button>
       </div>
@@ -142,11 +150,12 @@ function ListBoxSelection({
       {...rest}
       aria-label={description}
       className={className}
-      disabled={disabled}
+      disabled={disabled || readOnly}
       onClick={onClick}
       tabIndex={-1}
       title={description}
-      type="button">
+      type="button"
+      aria-disabled={readOnly ? true : undefined}>
       <Close />
     </button>
   );
@@ -164,6 +173,11 @@ ListBoxSelection.propTypes = {
    */
   disabled: PropTypes.bool,
 
+  /**
+   * Whether or not the listbox is readonly
+   */
+  readOnly: PropTypes.bool,
+
   /**
    * Specify an optional `onClearSelection` handler that is called when the underlying
    * element is cleared

packages/react/src/components/MultiSelect/FilterableMultiSelect.tsx

@@ -258,6 +258,11 @@
    */
   placeholder?: string;
 
+  /**
+   * Whether or not the filterable multiselect is readonly
+   */
+  readOnly?: boolean;
+
   /**
    * Specify feedback (mode) of the selection.
    * `top`: selected item jumps to top
@@ -335,6 +340,7 @@
     onChange,
     onMenuChange,
     placeholder,
+    readOnly,
     titleText,
     type,
     selectionFeedback = 'top-after-reopen',
@@ -505,9 +511,11 @@
   };
 
   function handleMenuChange(forceIsOpen: boolean): void {
-    const nextIsOpen = forceIsOpen ?? !isOpen;
-    setIsOpen(nextIsOpen);
-    validateHighlightFocus();
+    if (!readOnly) {
+      const nextIsOpen = forceIsOpen ?? !isOpen;
+      setIsOpen(nextIsOpen);
+      validateHighlightFocus();
+    }
   }
 
   useEffect(() => {
@@ -689,6 +697,7 @@
       [`${prefix}--multi-select--selected`]:
         controlledSelectedItems?.length > 0,
       [`${prefix}--multi-select--filterable--input-focused`]: inputFocused,
+      [`${prefix}--multi-select--readonly`]: readOnly,
     }
   );
 
@@ -798,6 +807,28 @@
     }
   };
 
+  const mergedRef = mergeRefs(textInput, inputProps.ref);
+
+  const readOnlyEventHandlers = readOnly
+    ? {
+        onClick: (evt: React.MouseEvent<HTMLInputElement>) => {
+          // NOTE: does not prevent click
+          evt.preventDefault();
+          // focus on the element as per readonly input behavior
+          if (mergedRef.current !== undefined) {
+            mergedRef.current.focus();
+          }
+        },
+        onKeyDown: (evt: React.KeyboardEvent<HTMLInputElement>) => {
+          const selectAccessKeys = ['ArrowDown', 'ArrowUp', ' ', 'Enter'];
+          // This prevents the select from opening for the above keys
+          if (selectAccessKeys.includes(evt.key)) {
+            evt.preventDefault();
+          }
+        },
+      }
+    : {};
+
   const clearSelectionContent =
     controlledSelectedItems.length > 0 ? (
       <span className={`${prefix}--visually-hidden`}>
@@ -832,13 +863,14 @@
         invalidText={invalidText}
         warn={warn}
         warnText={warnText}
-        isOpen={isOpen}
+        isOpen={!readOnly && isOpen}
         size={size}>
         <div
           className={`${prefix}--list-box__field`}
           ref={autoAlign ? refs.setReference : null}>
           {controlledSelectedItems.length > 0 && (
             <ListBoxSelection
+              readOnly={readOnly}
               clearSelection={() => {
                 clearSelection();
                 if (textInput.current) {
@@ -853,7 +885,9 @@
           <input
             className={inputClasses}
             {...inputProps}
-            ref={mergeRefs(textInput, inputProps.ref)}
+            ref={mergedRef}
+            {...readOnlyEventHandlers}
+            readOnly={readOnly}
           />
           {invalid && (
             <WarningFilled className={`${prefix}--list-box__invalid-icon`} />
@@ -868,6 +902,7 @@
               clearSelection={clearInputValue}
               disabled={disabled}
               translateWithId={translateWithId}
+              readOnly={readOnly}
               onMouseUp={(event: MouseEvent) => {
                 // If we do not stop this event from propagating,
                 // it seems like Downshift takes our event and

packages/react/src/components/MultiSelect/__tests__/FilterableMultiSelect-test.js

@@ -7,6 +7,7 @@
 
 import React from 'react';
 import { act, render, screen } from '@testing-library/react';
+import { getByText } from '@carbon/test-utils/dom';
 import userEvent from '@testing-library/user-event';
 import FilterableMultiSelect from '../FilterableMultiSelect';
 import {
@@ -63,6 +64,28 @@ describe('FilterableMultiSelect', () => {
     expect(mockProps.onMenuChange).toHaveBeenCalledWith(false);
   });
 
+  it('should not be interactive if readonly', async () => {
+    const items = generateItems(4, generateGenericItem);
+    const label = 'test-label';
+    const { container } = render(
+      <FilterableMultiSelect
+        id="test"
+        readOnly={true}
+        label={label}
+        items={items}
+      />
+    );
+    await waitForPosition();
+
+    // eslint-disable-next-line testing-library/prefer-screen-queries
+    const labelNode = getByText(container, label);
+    await userEvent.click(labelNode);
+
+    expect(
+      // eslint-disable-next-line testing-library/no-container, testing-library/no-node-access
+      container.querySelector('[aria-expanded="true"][aria-haspopup="listbox"]')
+    ).toBeFalsy();
+  });
   it('should initially have the menu open when open prop is provided', async () => {
     render(<FilterableMultiSelect {...mockProps} open />);
     await waitForPosition();