@wordpress/components/build-module/custom-select-control/index.js

UI components for WordPress.

import _extends from "@babel/runtime/helpers/esm/extends";
import { createElement } from "@wordpress/element";

/**
 * External dependencies
 */
import { useSelect } from 'downshift';
import classnames from 'classnames';
/**
 * WordPress dependencies
 */

import { Icon, check, chevronDown } from '@wordpress/icons';
/**
 * Internal dependencies
 */

import { Button, VisuallyHidden } from '../';

const itemToString = item => item && item.name; // This is needed so that in Windows, where
// the menu does not necessarily open on
// key up/down, you can still switch between
// options with the menu closed.


const stateReducer = ({
  selectedItem
}, {
  type,
  changes,
  props: {
    items
  }
}) => {
  switch (type) {
    case useSelect.stateChangeTypes.ToggleButtonKeyDownArrowDown:
      // If we already have a selected item, try to select the next one,
      // without circular navigation. Otherwise, select the first item.
      return {
        selectedItem: items[selectedItem ? Math.min(items.indexOf(selectedItem) + 1, items.length - 1) : 0]
      };

    case useSelect.stateChangeTypes.ToggleButtonKeyDownArrowUp:
      // If we already have a selected item, try to select the previous one,
      // without circular navigation. Otherwise, select the last item.
      return {
        selectedItem: items[selectedItem ? Math.max(items.indexOf(selectedItem) - 1, 0) : items.length - 1]
      };

    default:
      return changes;
  }
};

export default function CustomSelectControl({
  className,
  hideLabelFromVision,
  label,
  options: items,
  onChange: onSelectedItemChange,
  value: _selectedItem
}) {
  const {
    getLabelProps,
    getToggleButtonProps,
    getMenuProps,
    getItemProps,
    isOpen,
    highlightedIndex,
    selectedItem
  } = useSelect({
    initialSelectedItem: items[0],
    items,
    itemToString,
    onSelectedItemChange,
    selectedItem: _selectedItem,
    stateReducer
  });
  const menuProps = getMenuProps({
    className: 'components-custom-select-control__menu',
    'aria-hidden': !isOpen
  }); // We need this here, because the null active descendant is not
  // fully ARIA compliant.

  if (menuProps['aria-activedescendant'] && menuProps['aria-activedescendant'].slice(0, 'downshift-null'.length) === 'downshift-null') {
    delete menuProps['aria-activedescendant'];
  }

  return createElement("div", {
    className: classnames('components-custom-select-control', className)
  }, hideLabelFromVision ? createElement(VisuallyHidden, _extends({
    as: "label"
  }, getLabelProps()), label) :
  /* eslint-disable-next-line jsx-a11y/label-has-associated-control, jsx-a11y/label-has-for */
  createElement("label", getLabelProps({
    className: 'components-custom-select-control__label'
  }), label), createElement(Button, getToggleButtonProps({
    // This is needed because some speech recognition software don't support `aria-labelledby`.
    'aria-label': label,
    'aria-labelledby': undefined,
    className: 'components-custom-select-control__button',
    isSmall: true
  }), itemToString(selectedItem), createElement(Icon, {
    icon: chevronDown,
    className: "components-custom-select-control__button-icon"
  })), createElement("ul", menuProps, isOpen && items.map((item, index) => // eslint-disable-next-line react/jsx-key
  createElement("li", getItemProps({
    item,
    index,
    key: item.key,
    className: classnames(item.className, 'components-custom-select-control__item', {
      'is-highlighted': index === highlightedIndex
    }),
    style: item.style
  }), item.name, item === selectedItem && createElement(Icon, {
    icon: check,
    className: "components-custom-select-control__item-icon"
  })))));
}
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