@wordpress/components/build-module/autocomplete/autocompleter-ui.js

UI components for WordPress.

import { createElement, Fragment } from "@wordpress/element";

/**
 * External dependencies
 */
import classnames from 'classnames';
/**
 * WordPress dependencies
 */

import { useLayoutEffect, useRef, useEffect, useState } from '@wordpress/element';
import { useAnchor } from '@wordpress/rich-text';
import { useMergeRefs, useRefEffect } from '@wordpress/compose';
/**
 * Internal dependencies
 */

import getDefaultUseItems from './get-default-use-items';
import Button from '../button';
import Popover from '../popover';
import { VisuallyHidden } from '../visually-hidden';
import { createPortal } from 'react-dom';
export function getAutoCompleterUI(autocompleter) {
  const useItems = autocompleter.useItems ? autocompleter.useItems : getDefaultUseItems(autocompleter);

  function AutocompleterUI(_ref) {
    let {
      filterValue,
      instanceId,
      listBoxId,
      className,
      selectedIndex,
      onChangeOptions,
      onSelect,
      onReset,
      reset,
      contentRef
    } = _ref;
    const [items] = useItems(filterValue);
    const popoverAnchor = useAnchor({
      editableContentElement: contentRef.current
    });
    const [needsA11yCompat, setNeedsA11yCompat] = useState(false);
    const popoverRef = useRef(null);
    const popoverRefs = useMergeRefs([popoverRef, useRefEffect(node => {
      if (!contentRef.current) return; // If the popover is rendered in a different document than
      // the content, we need to duplicate the options list in the
      // content document so that it's available to the screen
      // readers, which check the DOM ID based aira-* attributes.

      setNeedsA11yCompat(node.ownerDocument !== contentRef.current.ownerDocument);
    }, [contentRef])]);
    useOnClickOutside(popoverRef, reset);
    useLayoutEffect(() => {
      onChangeOptions(items); // Temporarily disabling exhaustive-deps to avoid introducing unexpected side effecst.
      // See https://github.com/WordPress/gutenberg/pull/41820
      // eslint-disable-next-line react-hooks/exhaustive-deps
    }, [items]);

    if (items.length === 0) {
      return null;
    }

    const ListBox = _ref2 => {
      let {
        Component = 'div'
      } = _ref2;
      return createElement(Component, {
        id: listBoxId,
        role: "listbox",
        className: "components-autocomplete__results"
      }, items.map((option, index) => createElement(Button, {
        key: option.key,
        id: `components-autocomplete-item-${instanceId}-${option.key}`,
        role: "option",
        "aria-selected": index === selectedIndex,
        disabled: option.isDisabled,
        className: classnames('components-autocomplete__result', className, {
          'is-selected': index === selectedIndex
        }),
        onClick: () => onSelect(option)
      }, option.label)));
    };

    return createElement(Fragment, null, createElement(Popover, {
      focusOnMount: false,
      onClose: onReset,
      placement: "top-start",
      className: "components-autocomplete__popover",
      anchor: popoverAnchor,
      ref: popoverRefs
    }, createElement(ListBox, null)), contentRef.current && needsA11yCompat && createPortal(createElement(ListBox, {
      Component: VisuallyHidden
    }), contentRef.current.ownerDocument.body));
  }

  return AutocompleterUI;
}

function useOnClickOutside(ref, handler) {
  useEffect(() => {
    const listener = event => {
      // Do nothing if clicking ref's element or descendent elements, or if the ref is not referencing an element
      if (!ref.current || ref.current.contains(event.target)) {
        return;
      }

      handler(event);
    };

    document.addEventListener('mousedown', listener);
    document.addEventListener('touchstart', listener);
    return () => {
      document.removeEventListener('mousedown', listener);
      document.removeEventListener('touchstart', listener);
    }; // Disable reason: `ref` is a ref object and should not be included in a
    // hook's dependency list.
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [handler]);
}
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