104 lines
3.2 KiB
JavaScript
104 lines
3.2 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
exports.__esModule = true;
|
||
|
|
|
||
|
|
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
|
||
|
|
|
||
|
|
var _ariaUtils = require('./aria-utils');
|
||
|
|
|
||
|
|
var _ariaUtils2 = _interopRequireDefault(_ariaUtils);
|
||
|
|
|
||
|
|
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @constructor
|
||
|
|
* @desc Dialog object providing modal focus management.
|
||
|
|
*
|
||
|
|
* Assumptions: The element serving as the dialog container is present in the
|
||
|
|
* DOM and hidden. The dialog container has role='dialog'.
|
||
|
|
*
|
||
|
|
* @param dialogId
|
||
|
|
* The ID of the element serving as the dialog container.
|
||
|
|
* @param focusAfterClosed
|
||
|
|
* Either the DOM node or the ID of the DOM node to focus when the
|
||
|
|
* dialog closes.
|
||
|
|
* @param focusFirst
|
||
|
|
* Optional parameter containing either the DOM node or the ID of the
|
||
|
|
* DOM node to focus when the dialog opens. If not specified, the
|
||
|
|
* first focusable element in the dialog will receive focus.
|
||
|
|
*/
|
||
|
|
var aria = aria || {};
|
||
|
|
var tabEvent;
|
||
|
|
|
||
|
|
aria.Dialog = function (dialog, focusAfterClosed, focusFirst) {
|
||
|
|
var _this = this;
|
||
|
|
|
||
|
|
this.dialogNode = dialog;
|
||
|
|
if (this.dialogNode === null || this.dialogNode.getAttribute('role') !== 'dialog') {
|
||
|
|
throw new Error('Dialog() requires a DOM element with ARIA role of dialog.');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof focusAfterClosed === 'string') {
|
||
|
|
this.focusAfterClosed = document.getElementById(focusAfterClosed);
|
||
|
|
} else if ((typeof focusAfterClosed === 'undefined' ? 'undefined' : _typeof(focusAfterClosed)) === 'object') {
|
||
|
|
this.focusAfterClosed = focusAfterClosed;
|
||
|
|
} else {
|
||
|
|
this.focusAfterClosed = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof focusFirst === 'string') {
|
||
|
|
this.focusFirst = document.getElementById(focusFirst);
|
||
|
|
} else if ((typeof focusFirst === 'undefined' ? 'undefined' : _typeof(focusFirst)) === 'object') {
|
||
|
|
this.focusFirst = focusFirst;
|
||
|
|
} else {
|
||
|
|
this.focusFirst = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this.focusFirst) {
|
||
|
|
this.focusFirst.focus();
|
||
|
|
} else {
|
||
|
|
_ariaUtils2.default.focusFirstDescendant(this.dialogNode);
|
||
|
|
}
|
||
|
|
|
||
|
|
this.lastFocus = document.activeElement;
|
||
|
|
tabEvent = function tabEvent(e) {
|
||
|
|
_this.trapFocus(e);
|
||
|
|
};
|
||
|
|
this.addListeners();
|
||
|
|
};
|
||
|
|
|
||
|
|
aria.Dialog.prototype.addListeners = function () {
|
||
|
|
document.addEventListener('focus', tabEvent, true);
|
||
|
|
};
|
||
|
|
|
||
|
|
aria.Dialog.prototype.removeListeners = function () {
|
||
|
|
document.removeEventListener('focus', tabEvent, true);
|
||
|
|
};
|
||
|
|
|
||
|
|
aria.Dialog.prototype.closeDialog = function () {
|
||
|
|
var _this2 = this;
|
||
|
|
|
||
|
|
this.removeListeners();
|
||
|
|
if (this.focusAfterClosed) {
|
||
|
|
setTimeout(function () {
|
||
|
|
_this2.focusAfterClosed.focus();
|
||
|
|
});
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
aria.Dialog.prototype.trapFocus = function (event) {
|
||
|
|
if (_ariaUtils2.default.IgnoreUtilFocusChanges) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (this.dialogNode.contains(event.target)) {
|
||
|
|
this.lastFocus = event.target;
|
||
|
|
} else {
|
||
|
|
_ariaUtils2.default.focusFirstDescendant(this.dialogNode);
|
||
|
|
if (this.lastFocus === document.activeElement) {
|
||
|
|
_ariaUtils2.default.focusLastDescendant(this.dialogNode);
|
||
|
|
}
|
||
|
|
this.lastFocus = document.activeElement;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.default = aria.Dialog;
|