carbon-components
Version:
Carbon Components is a component library for IBM Cloud
294 lines (259 loc) • 11.5 kB
JavaScript
(function (global, factory) {
if (typeof define === "function" && define.amd) {
define(['exports', '../../globals/js/settings', '../../globals/js/misc/mixin', '../../globals/js/mixins/create-component', '../../globals/js/mixins/init-component-by-search', '../../globals/js/mixins/track-blur', '../../globals/js/misc/event-matches', '../../globals/js/misc/on'], factory);
} else if (typeof exports !== "undefined") {
factory(exports, require('../../globals/js/settings'), require('../../globals/js/misc/mixin'), require('../../globals/js/mixins/create-component'), require('../../globals/js/mixins/init-component-by-search'), require('../../globals/js/mixins/track-blur'), require('../../globals/js/misc/event-matches'), require('../../globals/js/misc/on'));
} else {
var mod = {
exports: {}
};
factory(mod.exports, global.settings, global.mixin, global.createComponent, global.initComponentBySearch, global.trackBlur, global.eventMatches, global.on);
global.dropdown = mod.exports;
}
})(this, function (exports, _settings, _mixin2, _createComponent, _initComponentBySearch, _trackBlur, _eventMatches, _on) {
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _settings2 = _interopRequireDefault(_settings);
var _mixin3 = _interopRequireDefault(_mixin2);
var _createComponent2 = _interopRequireDefault(_createComponent);
var _initComponentBySearch2 = _interopRequireDefault(_initComponentBySearch);
var _trackBlur2 = _interopRequireDefault(_trackBlur);
var _eventMatches2 = _interopRequireDefault(_eventMatches);
var _on2 = _interopRequireDefault(_on);
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
};
}
function _toConsumableArray(arr) {
if (Array.isArray(arr)) {
for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {
arr2[i] = arr[i];
}
return arr2;
} else {
return Array.from(arr);
}
}
function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
}
var _createClass = 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);
}
}
return function (Constructor, protoProps, staticProps) {
if (protoProps) defineProperties(Constructor.prototype, protoProps);
if (staticProps) defineProperties(Constructor, staticProps);
return Constructor;
};
}();
function _possibleConstructorReturn(self, call) {
if (!self) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return call && (typeof call === "object" || typeof call === "function") ? call : self;
}
function _inherits(subClass, superClass) {
if (typeof superClass !== "function" && superClass !== null) {
throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
}
subClass.prototype = Object.create(superClass && superClass.prototype, {
constructor: {
value: subClass,
enumerable: false,
writable: true,
configurable: true
}
});
if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
}
var Dropdown = function (_mixin) {
_inherits(Dropdown, _mixin);
/**
* A selector with drop downs.
* @extends CreateComponent
* @extends InitComponentBySearch
* @extends TrackBlur
* @param {HTMLElement} element The element working as a selector.
* @param {Object} [options] The component options.
* @param {string} [options.selectorItem] The CSS selector to find clickable areas in dropdown items.
* @param {string} [options.selectorItemSelected] The CSS selector to find the clickable area in the selected dropdown item.
* @param {string} [options.classSelected] The CSS class for the selected dropdown item.
* @param {string} [options.classOpen] The CSS class for the open state.
* @param {string} [options.classDisabled] The CSS class for the disabled state.
* @param {string} [options.eventBeforeSelected]
* The name of the custom event fired before a drop down item is selected.
* Cancellation of this event stops selection of drop down item.
* @param {string} [options.eventAfterSelected] The name of the custom event fired after a drop down item is selected.
*/
function Dropdown(element, options) {
_classCallCheck(this, Dropdown);
var _this = _possibleConstructorReturn(this, (Dropdown.__proto__ || Object.getPrototypeOf(Dropdown)).call(this, element, options));
_this.manage((0, _on2.default)(_this.element.ownerDocument, 'click', function (event) {
_this._toggle(event);
}));
_this.manage((0, _on2.default)(_this.element, 'keydown', function (event) {
_this._handleKeyDown(event);
}));
_this.manage((0, _on2.default)(_this.element, 'click', function (event) {
var item = (0, _eventMatches2.default)(event, _this.options.selectorItem);
if (item) {
_this.select(item);
}
}));
return _this;
}
/**
* Handles keydown event.
* @param {Event} event The event triggering this method.
*/
_createClass(Dropdown, [{
key: '_handleKeyDown',
value: function _handleKeyDown(event) {
var isOpen = this.element.classList.contains(this.options.classOpen);
var direction = {
38: this.constructor.NAVIGATE.BACKWARD,
40: this.constructor.NAVIGATE.FORWARD
}[event.which];
if (isOpen && direction !== undefined) {
this.navigate(direction);
event.preventDefault(); // Prevents up/down keys from scrolling container
} else {
this._toggle(event);
}
}
}, {
key: '_toggle',
value: function _toggle(event) {
var _this2 = this;
var isDisabled = this.element.classList.contains(this.options.classDisabled);
if (isDisabled) {
return;
}
if ([13, 32, 40].indexOf(event.which) >= 0 && !event.target.matches(this.options.selectorItem) || event.which === 27 || event.type === 'click') {
var isOpen = this.element.classList.contains(this.options.classOpen);
var isOfSelf = this.element.contains(event.target);
var actions = {
add: isOfSelf && event.which === 40 && !isOpen,
remove: (!isOfSelf || event.which === 27) && isOpen,
toggle: isOfSelf && event.which !== 27 && event.which !== 40
};
Object.keys(actions).forEach(function (action) {
if (actions[action]) {
_this2.element.classList[action](_this2.options.classOpen);
_this2.element.focus();
}
});
var listItems = [].concat(_toConsumableArray(this.element.querySelectorAll(this.options.selectorItem)));
listItems.forEach(function (item) {
if (_this2.element.classList.contains(_this2.options.classOpen)) {
item.tabIndex = 0;
} else {
item.tabIndex = -1;
}
});
}
}
}, {
key: 'getCurrentNavigation',
value: function getCurrentNavigation() {
var focused = this.element.ownerDocument.activeElement;
return focused.nodeType === Node.ELEMENT_NODE && focused.matches(this.options.selectorItem) ? focused : null;
}
}, {
key: 'navigate',
value: function navigate(direction) {
var items = [].concat(_toConsumableArray(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(i, l) {
return i + (i >= 0 ? 0 : l);
};
var handleOverflow = function handleOverflow(i, l) {
return i - (i < l ? 0 : l);
};
// `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.selectorItemSelected)) {
current.focus();
break;
}
}
}
}, {
key: 'select',
value: function select(itemToSelect) {
var _this3 = this;
var eventStart = new CustomEvent(this.options.eventBeforeSelected, {
bubbles: true,
cancelable: true,
detail: { item: itemToSelect }
});
if (this.element.dispatchEvent(eventStart)) {
if (this.element.dataset.dropdownType !== 'navigation') {
var selectorText = this.element.dataset.dropdownType !== 'inline' ? this.options.selectorText : this.options.selectorTextInner;
var text = this.element.querySelector(selectorText);
if (text) {
text.innerHTML = itemToSelect.innerHTML;
}
itemToSelect.classList.add(this.options.classSelected);
}
this.element.dataset.value = itemToSelect.parentElement.dataset.value;
[].concat(_toConsumableArray(this.element.querySelectorAll(this.options.selectorItemSelected))).forEach(function (item) {
if (itemToSelect !== item) {
item.classList.remove(_this3.options.classSelected);
}
});
this.element.dispatchEvent(new CustomEvent(this.options.eventAfterSelected, {
bubbles: true,
cancelable: true,
detail: { item: itemToSelect }
}));
}
}
}, {
key: 'handleBlur',
value: function handleBlur() {
this.element.classList.remove(this.options.classOpen);
}
}], [{
key: 'options',
get: function get() {
var prefix = _settings2.default.prefix;
return {
selectorInit: '[data-dropdown]',
selectorText: '.' + prefix + '--dropdown-text',
selectorTextInner: '.' + prefix + '--dropdown-text__inner',
selectorItem: '.' + prefix + '--dropdown-link',
selectorItemSelected: '.' + prefix + '--dropdown--selected',
classSelected: prefix + '--dropdown--selected',
classOpen: prefix + '--dropdown--open',
classDisabled: prefix + '--dropdown--disabled',
eventBeforeSelected: 'dropdown-beingselected',
eventAfterSelected: 'dropdown-selected'
};
}
}]);
return Dropdown;
}((0, _mixin3.default)(_createComponent2.default, _initComponentBySearch2.default, _trackBlur2.default));
Dropdown.components = new WeakMap();
Dropdown.NAVIGATE = {
BACKWARD: -1,
FORWARD: 1
};
exports.default = Dropdown;
});