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

UI components for GeChiUI.

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

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

import { Icon, check, chevronDown } from '@gechiui/icons';
import { __, sprintf } from '@gechiui/i18n';
import { useCallback } from '@gechiui/element';
/**
 * Internal dependencies
 */

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

const itemToString = item => item === null || item === void 0 ? void 0 : 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 = (_ref, _ref2) => {
  let {
    selectedItem
  } = _ref;
  let {
    type,
    changes,
    props: {
      items
    }
  } = _ref2;

  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(_ref3) {
  var _menuProps$ariaActiv;

  let {
    className,
    hideLabelFromVision,
    label,
    describedBy,
    options: items,
    onChange: onSelectedItemChange,
    value: _selectedItem
  } = _ref3;
  const {
    getLabelProps,
    getToggleButtonProps,
    getMenuProps,
    getItemProps,
    isOpen,
    highlightedIndex,
    selectedItem
  } = useSelect({
    initialSelectedItem: items[0],
    items,
    itemToString,
    onSelectedItemChange,
    ...(typeof _selectedItem !== 'undefined' && _selectedItem !== null ? {
      selectedItem: _selectedItem
    } : undefined),
    stateReducer
  });

  function getDescribedBy() {
    if (describedBy) {
      return describedBy;
    }

    if (!selectedItem) {
      return __('暂无选择');
    } // translators: %s: The selected option.


    return sprintf(__('当前选择：%s'), selectedItem.name);
  }

  const menuProps = getMenuProps({
    className: 'components-custom-select-control__menu',
    'aria-hidden': !isOpen
  });
  const onKeyDownHandler = useCallback(e => {
    var _menuProps$onKeyDown;

    e.stopPropagation();
    menuProps === null || menuProps === void 0 ? void 0 : (_menuProps$onKeyDown = menuProps.onKeyDown) === null || _menuProps$onKeyDown === void 0 ? void 0 : _menuProps$onKeyDown.call(menuProps, e);
  }, [menuProps]); // We need this here, because the null active descendant is not fully ARIA compliant.

  if ((_menuProps$ariaActiv = menuProps['aria-activedescendant']) !== null && _menuProps$ariaActiv !== void 0 && _menuProps$ariaActiv.startsWith('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,
    describedBy: getDescribedBy()
  }), itemToString(selectedItem), createElement(Icon, {
    icon: chevronDown,
    className: "components-custom-select-control__button-icon"
  })), createElement("ul", _extends({}, menuProps, {
    onKeyDown: onKeyDownHandler
  }), 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,
      'has-hint': !!item.__experimentalHint
    }),
    style: item.style
  }), item.name, item.__experimentalHint && createElement("span", {
    className: "components-custom-select-control__item-hint"
  }, item.__experimentalHint), item === selectedItem && createElement(Icon, {
    icon: check,
    className: "components-custom-select-control__item-icon"
  })))));
}
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