Improve accessibility of visibility modal dropdowns (#36068)

app/javascript/mastodon/components/dropdown/index.tsx

@@ -1,7 +1,7 @@
 import { useCallback, useId, useMemo, useRef, useState } from 'react';
 import type { ComponentPropsWithoutRef, FC } from 'react';
 
-import { FormattedMessage } from 'react-intl';
+import { useIntl } from 'react-intl';
 import type { MessageDescriptor } from 'react-intl';
 
 import classNames from 'classnames';
@@ -17,11 +17,12 @@ import { Icon } from '../icon';
 import { matchWidth } from './utils';
 
 interface DropdownProps {
-  title: string;
   disabled?: boolean;
   items: SelectItem[];
   onChange: (value: string) => void;
   current: string;
+  labelId: string;
+  descriptionId?: string;
   emptyText?: MessageDescriptor;
   classPrefix: string;
 }
@@ -29,39 +30,59 @@ interface DropdownProps {
 export const Dropdown: FC<
   DropdownProps & Omit<ComponentPropsWithoutRef<'button'>, keyof DropdownProps>
 > = ({
-  title,
   disabled,
   items,
   current,
   onChange,
+  labelId,
+  descriptionId,
   classPrefix,
   className,
+  id,
   ...buttonProps
 }) => {
+  const intl = useIntl();
   const buttonRef = useRef<HTMLButtonElement>(null);
-  const accessibilityId = useId();
+  const uniqueId = useId();
+  const buttonId = id ?? `${uniqueId}-button`;
+  const listboxId = `${uniqueId}-listbox`;
 
   const [open, setOpen] = useState(false);
+
   const handleToggle = useCallback(() => {
     if (!disabled) {
-      setOpen((prevOpen) => !prevOpen);
+      setOpen((prevOpen) => {
+        buttonRef.current?.focus();
+        return !prevOpen;
+      });
     }
   }, [disabled]);
+
   const handleClose = useCallback(() => {
     setOpen(false);
+    buttonRef.current?.focus();
   }, []);
+
   const currentText = useMemo(
-    () => items.find((i) => i.value === current)?.text,
-    [current, items],
+    () =>
+      items.find((i) => i.value === current)?.text ??
+      intl.formatMessage({
+        id: 'dropdown.empty',
+        defaultMessage: 'Select an option',
+      }),
+    [current, intl, items],
   );
+
   return (
     <>
       <button
         type='button'
         {...buttonProps}
-        title={title}
+        id={buttonId}
+        aria-labelledby={`${labelId} ${buttonId}`}
+        aria-describedby={descriptionId}
         aria-expanded={open}
-        aria-controls={accessibilityId}
+        aria-controls={listboxId}
         onClick={handleToggle}
         disabled={disabled}
         className={classNames(
@@ -74,12 +95,7 @@ export const Dropdown: FC<
         )}
         ref={buttonRef}
       >
-        {currentText ?? (
-          <FormattedMessage
-            id='dropdown.empty'
-            defaultMessage='Select an option'
-          />
-        )}
+        {currentText}
         <Icon
           id='unfold-icon'
           icon={UnfoldMoreIcon}
@@ -107,7 +123,7 @@ export const Dropdown: FC<
                 `${classPrefix}__dropdown`,
                 placement,
               )}
-              id={accessibilityId}
+              id={listboxId}
             >
               <DropdownSelector
                 items={items}

app/javascript/mastodon/components/dropdown_selector.tsx

@@ -39,24 +39,10 @@ export const DropdownSelector: React.FC<Props> = ({
   onClose,
   onChange,
 }) => {
-  const nodeRef = useRef<HTMLUListElement>(null);
+  const listRef = useRef<HTMLUListElement>(null);
   const focusedItemRef = useRef<HTMLLIElement>(null);
   const [currentValue, setCurrentValue] = useState(value);
 
-  const handleDocumentClick = useCallback(
-    (e: MouseEvent | TouchEvent) => {
-      if (
-        nodeRef.current &&
-        e.target instanceof Node &&
-        !nodeRef.current.contains(e.target)
-      ) {
-        onClose();
-        e.stopPropagation();
-      }
-    },
-    [nodeRef, onClose],
-  );
-
   const handleClick = useCallback(
     (
       e: React.MouseEvent<HTMLLIElement> | React.KeyboardEvent<HTMLLIElement>,
@@ -88,30 +74,30 @@ export const DropdownSelector: React.FC<Props> = ({
           break;
         case 'ArrowDown':
           element =
-            nodeRef.current?.children[index + 1] ??
-            nodeRef.current?.firstElementChild;
+            listRef.current?.children[index + 1] ??
+            listRef.current?.firstElementChild;
           break;
         case 'ArrowUp':
           element =
-            nodeRef.current?.children[index - 1] ??
-            nodeRef.current?.lastElementChild;
+            listRef.current?.children[index - 1] ??
+            listRef.current?.lastElementChild;
           break;
         case 'Tab':
           if (e.shiftKey) {
             element =
-              nodeRef.current?.children[index - 1] ??
-              nodeRef.current?.lastElementChild;
+              listRef.current?.children[index - 1] ??
+              listRef.current?.lastElementChild;
           } else {
             element =
-              nodeRef.current?.children[index + 1] ??
-              nodeRef.current?.firstElementChild;
+              listRef.current?.children[index + 1] ??
+              listRef.current?.firstElementChild;
           }
           break;
         case 'Home':
-          element = nodeRef.current?.firstElementChild;
+          element = listRef.current?.firstElementChild;
           break;
         case 'End':
-          element = nodeRef.current?.lastElementChild;
+          element = listRef.current?.lastElementChild;
           break;
       }
 
@@ -123,12 +109,24 @@ export const DropdownSelector: React.FC<Props> = ({
         e.stopPropagation();
       }
     },
-    [nodeRef, items, onClose, handleClick, setCurrentValue],
+    [items, onClose, handleClick, setCurrentValue],
   );
 
   useEffect(() => {
+    const handleDocumentClick = (e: MouseEvent | TouchEvent) => {
+      if (
+        listRef.current &&
+        e.target instanceof Node &&
+        !listRef.current.contains(e.target)
+      ) {
+        onClose();
+        e.stopPropagation();
+      }
+    };
+
     document.addEventListener('click', handleDocumentClick, { capture: true });
     document.addEventListener('touchend', handleDocumentClick, listenerOptions);
+
     focusedItemRef.current?.focus({ preventScroll: true });
 
     return () => {
@@ -141,10 +139,10 @@ export const DropdownSelector: React.FC<Props> = ({
         listenerOptions,
       );
     };
-  }, [handleDocumentClick]);
+  }, [onClose]);
 
   return (
-    <ul style={style} role='listbox' ref={nodeRef}>
+    <ul style={style} role='listbox' ref={listRef}>
       {items.map((item) => (
         <li
           role='option'

app/javascript/mastodon/features/notifications/components/select_with_label.tsx

@@ -143,16 +143,14 @@ export const SelectWithLabel: React.FC<PropsWithChildren<Props>> = ({
       </div>
 
       <div className='app-form__toggle__toggle'>
-        <div>
-          <Dropdown
-            value={value}
-            onChange={onChange}
-            disabled={disabled}
-            aria-labelledby={labelId}
-            aria-describedby={descId}
-            options={options}
-          />
-        </div>
+        <Dropdown
+          value={value}
+          onChange={onChange}
+          disabled={disabled}
+          aria-labelledby={labelId}
+          aria-describedby={descId}
+          options={options}
+        />
       </div>
     </label>
   );

app/javascript/mastodon/features/ui/components/visibility_modal.tsx

@@ -198,8 +198,11 @@ export const VisibilityModal: FC<VisibilityModalProps> = forwardRef(
       onClose();
     }, [onChange, onClose, visibility, quotePolicy]);
 
-    const privacyDropdownId = useId();
-    const quoteDropdownId = useId();
+    const uniqueId = useId();
+    const visibilityLabelId = `${uniqueId}-visibility-label`;
+    const visibilityDescriptionId = `${uniqueId}-visibility-desc`;
+    const quoteLabelId = `${uniqueId}-quote-label`;
+    const quoteDescriptionId = `${uniqueId}-quote-desc`;
 
     return (
       <div className='modal-root__modal dialog-modal visibility-modal'>
@@ -234,28 +237,36 @@ export const VisibilityModal: FC<VisibilityModalProps> = forwardRef(
             />
           </div>
           <div className='dialog-modal__content__form'>
-            <label
-              htmlFor={privacyDropdownId}
-              className={classNames('visibility-dropdown__label', {
+            <div
+              className={classNames('visibility-dropdown', {
                 disabled: disableVisibility,
               })}
             >
-              <FormattedMessage
-                id='visibility_modal.privacy_label'
-                defaultMessage='Visibility'
-              />
+              {/* eslint-disable-next-line jsx-a11y/label-has-associated-control */}
+              <label
+                className='visibility-dropdown__label'
+                id={visibilityLabelId}
+              >
+                <FormattedMessage
+                  id='visibility_modal.privacy_label'
+                  defaultMessage='Visibility'
+                />
+              </label>
 
               <Dropdown
                 items={visibilityItems}
-                classPrefix='visibility-dropdown'
                 current={visibility}
                 onChange={handleVisibilityChange}
-                title={intl.formatMessage(privacyMessages.change_privacy)}
+                labelId={visibilityLabelId}
+                descriptionId={visibilityDescriptionId}
+                classPrefix='visibility-dropdown'
                 disabled={disableVisibility}
-                id={privacyDropdownId}
               />
               {!!statusId && (
-                <p className='visibility-dropdown__helper'>
+                <p
+                  className='visibility-dropdown__helper'
+                  id='visibilityDescriptionId'
+                >
                   <FormattedMessage
                     id='visibility_modal.helper.privacy_editing'
                     defaultMessage="Visibility can't be changed after a post is published."
@@ -263,37 +274,47 @@ export const VisibilityModal: FC<VisibilityModalProps> = forwardRef(
                 </p>
               )}
               {!statusId && disablePublicVisibilities && (
-                <p className='visibility-dropdown__helper'>
+                <p
+                  className='visibility-dropdown__helper'
+                  id='visibilityDescriptionId'
+                >
                   <FormattedMessage
                     id='visibility_modal.helper.privacy_private_self_quote'
                     defaultMessage='Self-quotes of private posts cannot be made public.'
                   />
                 </p>
               )}
-            </label>
+            </div>
 
-            <label
-              htmlFor={quoteDropdownId}
-              className={classNames('visibility-dropdown__label', {
+            <div
+              className={classNames('visibility-dropdown', {
                 disabled: disableQuotePolicy,
               })}
             >
-              <FormattedMessage
-                id='visibility_modal.quote_label'
-                defaultMessage='Who can quote'
-              />
+              {/* eslint-disable-next-line jsx-a11y/label-has-associated-control */}
+              <label className='visibility-dropdown__label' id={quoteLabelId}>
+                <FormattedMessage
+                  id='visibility_modal.quote_label'
+                  defaultMessage='Who can quote'
+                />
+              </label>
 
               <Dropdown
                 items={quoteItems}
-                onChange={handleQuotePolicyChange}
-                classPrefix='visibility-dropdown'
                 current={disableQuotePolicy ? 'nobody' : quotePolicy}
-                title={intl.formatMessage(messages.buttonTitle)}
+                onChange={handleQuotePolicyChange}
+                labelId={quoteLabelId}
+                descriptionId={quoteDescriptionId}
+                classPrefix='visibility-dropdown'
                 disabled={disableQuotePolicy}
-                id={quoteDropdownId}
               />
-              <QuotePolicyHelper policy={quotePolicy} visibility={visibility} />
-            </label>
+              <QuotePolicyHelper
+                policy={quotePolicy}
+                visibility={visibility}
+                className='visibility-dropdown__helper'
+                id={quoteDescriptionId}
+              />
+            </div>
           </div>
           <div className='dialog-modal__content__actions'>
             <Button onClick={onClose} secondary>
@@ -316,42 +337,44 @@ export const VisibilityModal: FC<VisibilityModalProps> = forwardRef(
 );
 VisibilityModal.displayName = 'VisibilityModal';
 
-const QuotePolicyHelper: FC<{
-  policy: ApiQuotePolicy;
-  visibility: StatusVisibility;
-}> = ({ policy, visibility }) => {
+const QuotePolicyHelper: FC<
+  {
+    policy: ApiQuotePolicy;
+    visibility: StatusVisibility;
+  } & React.ComponentPropsWithoutRef<'p'>
+> = ({ policy, visibility, ...otherProps }) => {
+  let hintText: React.ReactElement | undefined;
+
   if (visibility === 'unlisted' && policy !== 'nobody') {
-    return (
-      <p className='visibility-dropdown__helper'>
-        <FormattedMessage
-          id='visibility_modal.helper.unlisted_quoting'
-          defaultMessage='When people quote you, their post will also be hidden from trending timelines.'
-        />
-      </p>
+    hintText = (
+      <FormattedMessage
+        id='visibility_modal.helper.unlisted_quoting'
+        defaultMessage='When people quote you, their post will also be hidden from trending timelines.'
+      />
     );
   }
 
   if (visibility === 'private') {
-    return (
-      <p className='visibility-dropdown__helper'>
-        <FormattedMessage
-          id='visibility_modal.helper.private_quoting'
-          defaultMessage="Follower-only posts authored on Mastodon can't be quoted by others."
-        />
-      </p>
+    hintText = (
+      <FormattedMessage
+        id='visibility_modal.helper.private_quoting'
+        defaultMessage="Follower-only posts authored on Mastodon can't be quoted by others."
+      />
     );
   }
 
   if (visibility === 'direct') {
-    return (
-      <p className='visibility-dropdown__helper'>
-        <FormattedMessage
-          id='visibility_modal.helper.direct_quoting'
-          defaultMessage="Private mentions authored on Mastodon can't be quoted by others."
-        />
-      </p>
+    hintText = (
+      <FormattedMessage
+        id='visibility_modal.helper.direct_quoting'
+        defaultMessage="Private mentions authored on Mastodon can't be quoted by others."
+      />
     );
   }
 
-  return null;
+  if (!hintText) {
+    return null;
+  }
+
+  return <p {...otherProps}>{hintText}</p>;
 };

app/javascript/styles/mastodon/components.scss

@@ -5694,20 +5694,15 @@ a.status-card {
     z-index: 9999;
   }
 
+  &.disabled {
+    opacity: 0.6;
+    cursor: default;
+  }
+
   &__label {
-    cursor: pointer;
     display: block;
-
-    > span {
-      display: block;
-      font-weight: 500;
-      margin-bottom: 8px;
-    }
-
-    &.disabled {
-      cursor: default;
-      opacity: 0.5;
-    }
+    font-weight: 500;
+    margin-bottom: 8px;
   }
 
   &__button {