carbon-components
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Carbon Components is a component library for IBM Cloud
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JavaScript
function _typeof(obj) {
if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
_typeof = function _typeof(obj) {
return typeof obj;
};
} else {
_typeof = function _typeof(obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
}
return _typeof(obj);
}
function _slicedToArray(arr, i) {
return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest();
}
function _nonIterableRest() {
throw new TypeError("Invalid attempt to destructure non-iterable instance");
}
function _iterableToArrayLimit(arr, i) {
var _arr = [];
var _n = true;
var _d = false;
var _e = undefined;
try {
for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
_arr.push(_s.value);
if (i && _arr.length === i) break;
}
} catch (err) {
_d = true;
_e = err;
} finally {
try {
if (!_n && _i["return"] != null) _i["return"]();
} finally {
if (_d) throw _e;
}
}
return _arr;
}
function _arrayWithHoles(arr) {
if (Array.isArray(arr)) return arr;
}
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);
return Constructor;
}
function _possibleConstructorReturn(self, call) {
if (call && (_typeof(call) === "object" || typeof call === "function")) {
return call;
}
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 _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
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
}
});
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);
}
/**
* 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';
import eventMatches from '../../globals/js/misc/event-matches';
var forEach =
/* #__PURE__ */
function () {
return Array.prototype.forEach;
}();
var toArray = function toArray(arrayLike) {
return Array.prototype.slice.call(arrayLike);
};
var HeaderSubmenu =
/*#__PURE__*/
function (_mixin) {
_inherits(HeaderSubmenu, _mixin);
function HeaderSubmenu(element, options) {
var _this;
_classCallCheck(this, HeaderSubmenu);
_this = _possibleConstructorReturn(this, _getPrototypeOf(HeaderSubmenu).call(this, element, options));
_this._getAction = function (event) {
var isFlyoutMenu = eventMatches(event, _this.options.selectorFlyoutMenu);
if (isFlyoutMenu) {
return _this.constructor.actions.DELEGATE_TO_FLYOUT_MENU;
}
switch (event.type) {
case 'keydown':
return {
32: _this.constructor.actions.TOGGLE_SUBMENU_WITH_FOCUS,
// space bar
13: _this.constructor.actions.TOGGLE_SUBMENU_WITH_FOCUS,
// enter
27: _this.constructor.actions.CLOSE_SUBMENU // esc
// possible arrow keys
}[event.which];
case 'click':
return eventMatches(event, _this.options.selectorItem) ? _this.constructor.actions.CLOSE_SUBMENU : null;
case 'blur':
case 'focusout':
{
var isOfSelf = _this.element.contains(event.relatedTarget);
return isOfSelf ? null : _this.constructor.actions.CLOSE_SUBMENU;
}
case 'mouseenter':
return _this.constructor.actions.OPEN_SUBMENU;
case 'mouseleave':
return _this.constructor.actions.CLOSE_SUBMENU;
default:
return null;
}
};
_this._getNewState = function (action) {
var trigger = _this.element.querySelector(_this.options.selectorTrigger);
var isExpanded = trigger.getAttribute(_this.options.attribExpanded) === 'true';
switch (action) {
case _this.constructor.actions.CLOSE_SUBMENU:
return false;
case _this.constructor.actions.OPEN_SUBMENU:
return true;
case _this.constructor.actions.TOGGLE_SUBMENU_WITH_FOCUS:
return !isExpanded;
default:
return isExpanded;
}
};
_this._setState = function (_ref) {
var shouldBeExpanded = _ref.shouldBeExpanded,
shouldFocusOnOpen = _ref.shouldFocusOnOpen;
var trigger = _this.element.querySelector(_this.options.selectorTrigger);
trigger.setAttribute(_this.options.attribExpanded, shouldBeExpanded);
forEach.call(_this.element.querySelectorAll(_this.options.selectorItem), function (item) {
item.tabIndex = shouldBeExpanded ? 0 : -1;
}); // focus first submenu item
if (shouldBeExpanded && shouldFocusOnOpen) {
_this.element.querySelector(_this.options.selectorItem).focus();
}
};
_this.getCurrentNavigation = function () {
var focused = _this.element.ownerDocument.activeElement;
return focused.nodeType === Node.ELEMENT_NODE && focused.matches(_this.options.selectorItem) ? focused : null;
};
_this.navigate = function (direction) {
var items = toArray(_this.element.querySelectorAll(_this.options.selectorItem));
var start = _this.getCurrentNavigation() || _this.element.querySelector(_this.options.selectorItemSelected);
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)
var index = Math.max(items.indexOf(old) + direction, -1);
return items[handleUnderflow(handleOverflow(index, items.length), items.length)];
};
for (var current = getNextItem(start); current && current !== start; current = getNextItem(current)) {
if (!current.matches(_this.options.selectorItemHidden) && !current.parentNode.matches(_this.options.selectorItemHidden) && !current.matches(_this.options.selectorItemSelected)) {
current.focus();
break;
}
}
};
_this._handleEvent = function (event) {
var trigger = _this.element.querySelector(_this.options.selectorTrigger);
if (!trigger) {
return;
}
var action = _this._getAction(event);
if (action) {
var shouldBeExpanded = _this._getNewState(action);
_this._setState({
shouldBeExpanded: shouldBeExpanded
});
}
};
_this._handleKeyDown = function (event) {
var trigger = _this.element.querySelector(_this.options.selectorTrigger);
if (!trigger) {
return;
}
var action = _this._getAction(event);
if (event.which === 32) {
event.preventDefault();
}
switch (action) {
case _this.constructor.actions.DELEGATE_TO_FLYOUT_MENU:
// currently we do not have a scenario that handles flyout menu
// handleFlyoutMenu
break;
// currently we do not have a scenario that opens a submenu on keydown
// case this.constructor.actions.OPEN_SUBMENU:
case _this.constructor.actions.CLOSE_SUBMENU:
{
var shouldBeExpanded = _this._getNewState(action);
_this._setState({
shouldBeExpanded: shouldBeExpanded
});
break;
}
case _this.constructor.actions.TOGGLE_SUBMENU_WITH_FOCUS:
{
var _shouldBeExpanded = _this._getNewState(action);
_this._setState({
shouldBeExpanded: _shouldBeExpanded,
shouldFocusOnOpen: true
});
break;
}
default:
{
var expanded = trigger.getAttribute(_this.options.attribExpanded) === 'true';
if (expanded) {
var direction = {
38: _this.constructor.NAVIGATE.BACKWARD,
40: _this.constructor.NAVIGATE.FORWARD
}[event.which];
switch (event.which) {
case 35:
{
// end key
event.preventDefault(); // prevents key from scrolling page
var menuItems = _this.element.querySelectorAll(_this.options.selectorItem);
var lastMenuItem = menuItems[menuItems.length - 1];
if (lastMenuItem) {
lastMenuItem.focus();
}
break;
}
case 36:
{
// home key
event.preventDefault(); // prevents key from scrolling page
var _this$element$querySe = _this.element.querySelectorAll(_this.options.selectorItem),
_this$element$querySe2 = _slicedToArray(_this$element$querySe, 1),
firstMenuItem = _this$element$querySe2[0];
if (firstMenuItem) {
firstMenuItem.focus();
}
break;
}
case 38: // up arrow
case 40:
// down arrow
_this.navigate(direction);
event.preventDefault(); // prevents keys from scrolling page
break;
default:
break;
}
}
break;
}
}
};
var hasFocusOut = 'onfocusout' in window;
_this.manage(on(_this.element, hasFocusOut ? 'focusout' : 'blur', _this._handleEvent, !hasFocusOut));
_this.manage(on(_this.element, 'mouseenter', _this._handleEvent));
_this.manage(on(_this.element, 'mouseleave', _this._handleEvent));
_this.manage(on(_this.element, 'click', _this._handleEvent));
_this.manage(on(_this.element, 'keydown', _this._handleKeyDown));
return _this;
}
/**
* The map associating DOM element and HeaderSubmenu instance.
* @member HeaderSubmenu.components
* @type {WeakMap}
*/
_createClass(HeaderSubmenu, null, [{
key: "options",
/**
* The component options.
* If `options` is specified in the constructor,
* {@linkcode HeaderSubmenu.create .create()}, or
* {@linkcode HeaderSubmenu.init .init()},
* properties in this object are overriden for the instance being create and
* how {@linkcode HeaderSubmenu.init .init()} works.
* @member HeaderSubmenu.options
* @type {Object}
* @property {string} selectorInit The data attribute to find side navs.
*/
get: function get() {
var prefix = settings.prefix;
return {
selectorInit: '[data-header-submenu]',
selectorTrigger: ".".concat(prefix, "--header__menu-title"),
selectorItem: ".".concat(prefix, "--header__menu .").concat(prefix, "--header__menu-item"),
attribExpanded: 'aria-expanded'
};
}
/**
* Enum for navigating backward/forward.
* @readonly
* @member HeaderSubmenu.NAVIGATE
* @type {Object}
* @property {number} BACKWARD Navigating backward.
* @property {number} FORWARD Navigating forward.
*/
}]);
HeaderSubmenu.components = new WeakMap();
HeaderSubmenu.actions = {
CLOSE_SUBMENU: 'CLOSE_SUBMENU',
OPEN_SUBMENU: 'OPEN_SUBMENU',
TOGGLE_SUBMENU_WITH_FOCUS: 'TOGGLE_SUBMENU_WITH_FOCUS',
DELEGATE_TO_FLYOUT_MENU: 'DELEGATE_TO_FLYOUT_MENU'
};
HeaderSubmenu.NAVIGATE = {
BACKWARD: -1,
FORWARD: 1
};
return HeaderSubmenu;
}(mixin(createComponent, initComponentBySearch, handles));
export { HeaderSubmenu as default };