vcc-ui/dist/components/nav/index.js

A React library for building user interfaces at Volvo Cars

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useKeyboardNavigation = exports.Nav = exports.KeyboardNavigationProvider = void 0;
var _reactAria = require("@volvo-cars/react-aria");
var _propTypes = _interopRequireDefault(require("prop-types"));
var _react = _interopRequireWildcard(require("react"));
var _useTheme = require("../../styling/use-theme");
var _block = require("../block");
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
const {
  useKeyboardNavigation,
  KeyboardNavigationProvider
} = (0, _reactAria.createKeyboardNavigation)();
exports.KeyboardNavigationProvider = KeyboardNavigationProvider;
exports.useKeyboardNavigation = useKeyboardNavigation;
const hideOnScrollOffsetTop = 80;
const navStyle = _ref => {
  let {
    theme,
    sticky,
    hideOnScroll,
    isVisible
  } = _ref;
  return {
    position: 'relative',
    zIndex: 10,
    width: '100%',
    background: theme.color.background.primary,
    boxSizing: 'border-box',
    ':before': {
      content: "''",
      display: 'block',
      background: theme.color.ornament.divider,
      height: 1,
      outline: 'none',
      position: 'absolute',
      left: 0,
      right: 0,
      zIndex: -1,
      bottom: 0
    },
    extend: [{
      condition: sticky,
      style: {
        position: 'fixed',
        top: 0,
        left: 0
      }
    }, {
      condition: hideOnScroll,
      style: {
        transition: 'transform 200ms ease-out'
      }
    }, {
      condition: !isVisible,
      style: {
        transform: 'translateY(-100%)'
      }
    }]
  };
};

// using an external variable for performance reasons
let previousScrollY = 0;
/**
 * @deprecated Use `<nav>` element instead.
 */
const Nav = exports.Nav = /*#__PURE__*/(0, _react.forwardRef)((_ref2, ref) => {
  let {
    hideOnScroll = false,
    sticky = false,
    children
  } = _ref2;
  const [isVisible, setVisible] = (0, _react.useState)(true);
  const theme = (0, _useTheme.useTheme)();
  (0, _react.useEffect)(() => {
    const toggleVisibility = () => {
      if (window.scrollY > previousScrollY) {
        if (isVisible && window.scrollY > hideOnScrollOffsetTop) {
          setVisible(false);
        }
      } else {
        if (!isVisible) {
          setVisible(true);
        }
      }
      previousScrollY = window.scrollY;
    };
    if (hideOnScroll) {
      window.addEventListener('scroll', toggleVisibility);
    }
    return () => {
      window.removeEventListener('scroll', toggleVisibility);
    };
  }, [hideOnScroll, isVisible]);
  const styleProps = {
    sticky,
    hideOnScroll,
    isVisible,
    theme
  };
  return /*#__PURE__*/_react.default.createElement(_block.Block, {
    as: "nav",
    ref: ref,
    extend: navStyle(styleProps)
  }, /*#__PURE__*/_react.default.createElement(KeyboardNavigationProvider, null, children));
});
Nav.displayName = 'Nav';
Nav.propTypes = {
  /** Automatically hide the sticky navigation if the user starts scrolling */
  hideOnScroll: _propTypes.default.bool,
  /** Make the navigation stick to the top of the viewport */
  sticky: _propTypes.default.bool,
  /** A JSX node */
  // @ts-ignore
  children: _propTypes.default.node
};