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carbon-components

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The Carbon Design System is IBM’s open-source design system for products and experiences.

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function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); } function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; } function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); } function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); } function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; } function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); } function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; } function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } } function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); } /** * Copyright IBM Corp. 2016, 2018 * * This source code is licensed under the Apache-2.0 license found in the * LICENSE file in the root directory of this source tree. */ import mixin from '../../globals/js/misc/mixin'; import createComponent from '../../globals/js/mixins/create-component'; import initComponentBySearch from '../../globals/js/mixins/init-component-by-search'; import handles from '../../globals/js/mixins/handles'; import on from '../../globals/js/misc/on'; import settings from '../../globals/js/settings'; var toArray = function toArray(arrayLike) { return Array.prototype.slice.call(arrayLike); }; var HeaderNav = /*#__PURE__*/function (_mixin) { _inherits(HeaderNav, _mixin); var _super = _createSuper(HeaderNav); /** * Header nav. * @extends CreateComponent * @extends InitComponentBySearch * @extends Handles * @param {HTMLElement} element The element working as an header nav. * @param {object} [options] The component options. * @param {string} [options.selectorSubmenu] The CSS selector to find sub menus. * @param {string} [options.selectorSubmenuLink] The CSS selector to find the trigger buttons of sub menus. * @param {string} [options.selectorSubmenuItem] The CSS selector to find the sub menu items. */ /** * Header nav. * @extends CreateComponent * @extends InitComponentBySearch * @extends Handles * @param {HTMLElement} element The element working as an header nav. * @param {object} [options] The component options. * @param {string} [options.selectorSubmenu] The CSS selector to find sub menus. * @param {string} [options.selectorSubmenuLink] The CSS selector to find the trigger buttons of sub menus. * @param {string} [options.selectorSubmenuItem] The CSS selector to find the sub menu items. */ function HeaderNav(element, options) { var _this; _classCallCheck(this, HeaderNav); _this = _super.call(this, element, options); _this.getCurrentNavigation = function () { var focused = _this.element.ownerDocument.activeElement.closest(_this.options.selectorSubmenu); return focused && focused.nodeType === Node.ELEMENT_NODE ? focused.querySelector(_this.options.selectorSubmenuLink) : null; }; _this.navigate = function (direction) { var items = toArray(_this.element.querySelectorAll(_this.options.selectorSubmenuLink)); var start = _this.getCurrentNavigation(); var getNextItem = function getNextItem(old) { var handleUnderflow = function handleUnderflow(index, length) { return index + (index >= 0 ? 0 : length); }; var handleOverflow = function handleOverflow(index, length) { return index - (index < length ? 0 : length); }; // `items.indexOf(old)` may be -1 (Scenario of no previous focus) // `items.indexOf(old)` may be -1 (Scenario of no previous focus) var index = Math.max(items.indexOf(old) + direction, -1); return items[handleUnderflow(handleOverflow(index, items.length), items.length)]; }; getNextItem(start).focus(); }; _this._handleKeyDown = function (event) { var keyCodes = { 37: _this.constructor.NAVIGATE.BACKWARD, // left arrow 39: _this.constructor.NAVIGATE.FORWARD // right arrow }; var keyCodeMatches = keyCodes[event.which]; if (keyCodeMatches) { _this.navigate(keyCodeMatches); } }; _this.manage(on(_this.element, 'keydown', _this._handleKeyDown)); return _this; } /** * The map associating DOM element and Header instance. * @member HeaderNav.components * @type {WeakMap} */ /** * The map associating DOM element and Header instance. * @member HeaderNav.components * @type {WeakMap} */ _createClass(HeaderNav, null, [{ key: "options", get: /** * The component options. * If `options` is specified in the constructor, * {@linkcode HeaderNav.create .create()}, or * {@linkcode HeaderNav.init .init()}, * properties in this object are overridden for the instance being create and * how {@linkcode HeaderNav.init .init()} works. * @member HeaderNav.options * @type {object} * @property {string} selectorInit The data attribute to find side navs. * @property {string} [selectorSubmenu] The CSS selector to find sub menus. * @property {string} [selectorSubmenuLink] The CSS selector to find the trigger buttons of sub menus. * @property {string} [selectorSubmenuItem] The CSS selector to find the sub menu items. */ function get() { var prefix = settings.prefix; return { selectorInit: '[data-header-nav]', selectorNavKind: '[data-header-nav-kind]', selectorSubmenu: ".".concat(prefix, "--header__submenu"), selectorSubmenuLink: ".".concat(prefix, "--header__menu-title"), selectorSubmenuItem: ".".concat(prefix, "--header__menu-title > .").concat(prefix, "--header__menu-item") }; } /** * Enum for navigating backward/forward. * @readonly * @member Header.NAVIGATE * @type {object} * @property {number} BACKWARD Navigating backward. * @property {number} FORWARD Navigating forward. */ }]); HeaderNav.components = new WeakMap(); HeaderNav.NAVIGATE = { BACKWARD: -1, FORWARD: 1 }; return HeaderNav; }(mixin(createComponent, initComponentBySearch, handles)); export default HeaderNav;