react-bootstrap/esm/AbstractNav.js

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import qsa from 'dom-helpers/querySelectorAll';
import React, { useContext, useEffect, useRef } from 'react';
import useForceUpdate from '@restart/hooks/useForceUpdate';
import useMergedRefs from '@restart/hooks/useMergedRefs';
import NavContext from './NavContext';
import SelectableContext, { makeEventKey } from './SelectableContext';
import TabContext from './TabContext';

// eslint-disable-next-line @typescript-eslint/no-empty-function
var noop = function noop() {};

var AbstractNav = /*#__PURE__*/React.forwardRef(function (_ref, ref) {
  var _ref$as = _ref.as,
      Component = _ref$as === void 0 ? 'ul' : _ref$as,
      onSelect = _ref.onSelect,
      activeKey = _ref.activeKey,
      role = _ref.role,
      onKeyDown = _ref.onKeyDown,
      props = _objectWithoutPropertiesLoose(_ref, ["as", "onSelect", "activeKey", "role", "onKeyDown"]);

  // A ref and forceUpdate for refocus, b/c we only want to trigger when needed
  // and don't want to reset the set in the effect
  var forceUpdate = useForceUpdate();
  var needsRefocusRef = useRef(false);
  var parentOnSelect = useContext(SelectableContext);
  var tabContext = useContext(TabContext);
  var getControlledId, getControllerId;

  if (tabContext) {
    role = role || 'tablist';
    activeKey = tabContext.activeKey;
    getControlledId = tabContext.getControlledId;
    getControllerId = tabContext.getControllerId;
  }

  var listNode = useRef(null);

  var getNextActiveChild = function getNextActiveChild(offset) {
    var currentListNode = listNode.current;
    if (!currentListNode) return null;
    var items = qsa(currentListNode, '[data-rb-event-key]:not(.disabled)');
    var activeChild = currentListNode.querySelector('.active');
    if (!activeChild) return null;
    var index = items.indexOf(activeChild);
    if (index === -1) return null;
    var nextIndex = index + offset;
    if (nextIndex >= items.length) nextIndex = 0;
    if (nextIndex < 0) nextIndex = items.length - 1;
    return items[nextIndex];
  };

  var handleSelect = function handleSelect(key, event) {
    if (key == null) return;
    if (onSelect) onSelect(key, event);
    if (parentOnSelect) parentOnSelect(key, event);
  };

  var handleKeyDown = function handleKeyDown(event) {
    if (onKeyDown) onKeyDown(event);
    var nextActiveChild;

    switch (event.key) {
      case 'ArrowLeft':
      case 'ArrowUp':
        nextActiveChild = getNextActiveChild(-1);
        break;

      case 'ArrowRight':
      case 'ArrowDown':
        nextActiveChild = getNextActiveChild(1);
        break;

      default:
        return;
    }

    if (!nextActiveChild) return;
    event.preventDefault();
    handleSelect(nextActiveChild.dataset.rbEventKey, event);
    needsRefocusRef.current = true;
    forceUpdate();
  };

  useEffect(function () {
    if (listNode.current && needsRefocusRef.current) {
      var activeChild = listNode.current.querySelector('[data-rb-event-key].active');
      if (activeChild) activeChild.focus();
    }

    needsRefocusRef.current = false;
  });
  var mergedRef = useMergedRefs(ref, listNode);
  return /*#__PURE__*/React.createElement(SelectableContext.Provider, {
    value: handleSelect
  }, /*#__PURE__*/React.createElement(NavContext.Provider, {
    value: {
      role: role,
      // used by NavLink to determine it's role
      activeKey: makeEventKey(activeKey),
      getControlledId: getControlledId || noop,
      getControllerId: getControllerId || noop
    }
  }, /*#__PURE__*/React.createElement(Component, _extends({}, props, {
    onKeyDown: handleKeyDown,
    ref: mergedRef,
    role: role
  }))));
});
export default AbstractNav;