carbon-components
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The Carbon Design System is IBM’s open-source design system for products and experiences.
278 lines (230 loc) • 8.9 kB
JavaScript
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;