Google Git
Sign in
apache / nifi-fds / 6435e394f6c7c31d3f61a4bfc9702bde2a1659fa / . / node_modules / @angular / cdk / esm2015 / a11y.js
blob: a3e73f90fc7b865e998c6bea5082996ed15ec5ae [file] [log] [blame]
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { DOCUMENT, CommonModule } from '@angular/common';
import { Inject, Injectable, Optional, SkipSelf, QueryList, Directive, ElementRef, Input, NgZone, isDevMode, InjectionToken, EventEmitter, Output, NgModule, ɵɵdefineInjectable, ɵɵinject } from '@angular/core';
import { Subject, Subscription, of } from 'rxjs';
import { UP_ARROW, DOWN_ARROW, LEFT_ARROW, RIGHT_ARROW, TAB, A, Z, ZERO, NINE, hasModifierKey } from '@angular/cdk/keycodes';
import { debounceTime, filter, map, tap, take } from 'rxjs/operators';
import { Platform, normalizePassiveListenerOptions, PlatformModule } from '@angular/cdk/platform';
import { coerceBooleanProperty, coerceElement } from '@angular/cdk/coercion';
import { ContentObserver, ObserversModule } from '@angular/cdk/observers';
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* IDs are deliminated by an empty space, as per the spec.
* @type {?}
*/
const ID_DELIMINATOR = ' ';
/**
* Adds the given ID to the specified ARIA attribute on an element.
* Used for attributes such as aria-labelledby, aria-owns, etc.
* @param {?} el
* @param {?} attr
* @param {?} id
* @return {?}
*/
function addAriaReferencedId(el, attr, id) {
/** @type {?} */
const ids = getAriaReferenceIds(el, attr);
if (ids.some((/**
* @param {?} existingId
* @return {?}
*/
existingId => existingId.trim() == id.trim()))) {
return;
}
ids.push(id.trim());
el.setAttribute(attr, ids.join(ID_DELIMINATOR));
}
/**
* Removes the given ID from the specified ARIA attribute on an element.
* Used for attributes such as aria-labelledby, aria-owns, etc.
* @param {?} el
* @param {?} attr
* @param {?} id
* @return {?}
*/
function removeAriaReferencedId(el, attr, id) {
/** @type {?} */
const ids = getAriaReferenceIds(el, attr);
/** @type {?} */
const filteredIds = ids.filter((/**
* @param {?} val
* @return {?}
*/
val => val != id.trim()));
el.setAttribute(attr, filteredIds.join(ID_DELIMINATOR));
}
/**
* Gets the list of IDs referenced by the given ARIA attribute on an element.
* Used for attributes such as aria-labelledby, aria-owns, etc.
* @param {?} el
* @param {?} attr
* @return {?}
*/
function getAriaReferenceIds(el, attr) {
// Get string array of all individual ids (whitespace deliminated) in the attribute value
return (el.getAttribute(attr) || '').match(/\S+/g) || [];
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* ID used for the body container where all messages are appended.
* @type {?}
*/
const MESSAGES_CONTAINER_ID = 'cdk-describedby-message-container';
/**
* ID prefix used for each created message element.
* @type {?}
*/
const CDK_DESCRIBEDBY_ID_PREFIX = 'cdk-describedby-message';
/**
* Attribute given to each host element that is described by a message element.
* @type {?}
*/
const CDK_DESCRIBEDBY_HOST_ATTRIBUTE = 'cdk-describedby-host';
/**
* Global incremental identifier for each registered message element.
* @type {?}
*/
let nextId = 0;
/**
* Global map of all registered message elements that have been placed into the document.
* @type {?}
*/
const messageRegistry = new Map();
/**
* Container for all registered messages.
* @type {?}
*/
let messagesContainer = null;
/**
* Utility that creates visually hidden elements with a message content. Useful for elements that
* want to use aria-describedby to further describe themselves without adding additional visual
* content.
*/
class AriaDescriber {
/**
* @param {?} _document
*/
constructor(_document) {
this._document = _document;
}
/**
* Adds to the host element an aria-describedby reference to a hidden element that contains
* the message. If the same message has already been registered, then it will reuse the created
* message element.
* @param {?} hostElement
* @param {?} message
* @return {?}
*/
describe(hostElement, message) {
if (!this._canBeDescribed(hostElement, message)) {
return;
}
if (typeof message !== 'string') {
// We need to ensure that the element has an ID.
this._setMessageId(message);
messageRegistry.set(message, { messageElement: message, referenceCount: 0 });
}
else if (!messageRegistry.has(message)) {
this._createMessageElement(message);
}
if (!this._isElementDescribedByMessage(hostElement, message)) {
this._addMessageReference(hostElement, message);
}
}
/**
* Removes the host element's aria-describedby reference to the message element.
* @param {?} hostElement
* @param {?} message
* @return {?}
*/
removeDescription(hostElement, message) {
if (!this._isElementNode(hostElement)) {
return;
}
if (this._isElementDescribedByMessage(hostElement, message)) {
this._removeMessageReference(hostElement, message);
}
// If the message is a string, it means that it's one that we created for the
// consumer so we can remove it safely, otherwise we should leave it in place.
if (typeof message === 'string') {
/** @type {?} */
const registeredMessage = messageRegistry.get(message);
if (registeredMessage && registeredMessage.referenceCount === 0) {
this._deleteMessageElement(message);
}
}
if (messagesContainer && messagesContainer.childNodes.length === 0) {
this._deleteMessagesContainer();
}
}
/**
* Unregisters all created message elements and removes the message container.
* @return {?}
*/
ngOnDestroy() {
/** @type {?} */
const describedElements = this._document.querySelectorAll(`[${CDK_DESCRIBEDBY_HOST_ATTRIBUTE}]`);
for (let i = 0; i < describedElements.length; i++) {
this._removeCdkDescribedByReferenceIds(describedElements[i]);
describedElements[i].removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);
}
if (messagesContainer) {
this._deleteMessagesContainer();
}
messageRegistry.clear();
}
/**
* Creates a new element in the visually hidden message container element with the message
* as its content and adds it to the message registry.
* @private
* @param {?} message
* @return {?}
*/
_createMessageElement(message) {
/** @type {?} */
const messageElement = this._document.createElement('div');
this._setMessageId(messageElement);
messageElement.textContent = message;
this._createMessagesContainer();
(/** @type {?} */ (messagesContainer)).appendChild(messageElement);
messageRegistry.set(message, { messageElement, referenceCount: 0 });
}
/**
* Assigns a unique ID to an element, if it doesn't have one already.
* @private
* @param {?} element
* @return {?}
*/
_setMessageId(element) {
if (!element.id) {
element.id = `${CDK_DESCRIBEDBY_ID_PREFIX}-${nextId++}`;
}
}
/**
* Deletes the message element from the global messages container.
* @private
* @param {?} message
* @return {?}
*/
_deleteMessageElement(message) {
/** @type {?} */
const registeredMessage = messageRegistry.get(message);
/** @type {?} */
const messageElement = registeredMessage && registeredMessage.messageElement;
if (messagesContainer && messageElement) {
messagesContainer.removeChild(messageElement);
}
messageRegistry.delete(message);
}
/**
* Creates the global container for all aria-describedby messages.
* @private
* @return {?}
*/
_createMessagesContainer() {
if (!messagesContainer) {
/** @type {?} */
const preExistingContainer = this._document.getElementById(MESSAGES_CONTAINER_ID);
// When going from the server to the client, we may end up in a situation where there's
// already a container on the page, but we don't have a reference to it. Clear the
// old container so we don't get duplicates. Doing this, instead of emptying the previous
// container, should be slightly faster.
if (preExistingContainer) {
(/** @type {?} */ (preExistingContainer.parentNode)).removeChild(preExistingContainer);
}
messagesContainer = this._document.createElement('div');
messagesContainer.id = MESSAGES_CONTAINER_ID;
messagesContainer.setAttribute('aria-hidden', 'true');
messagesContainer.style.display = 'none';
this._document.body.appendChild(messagesContainer);
}
}
/**
* Deletes the global messages container.
* @private
* @return {?}
*/
_deleteMessagesContainer() {
if (messagesContainer && messagesContainer.parentNode) {
messagesContainer.parentNode.removeChild(messagesContainer);
messagesContainer = null;
}
}
/**
* Removes all cdk-describedby messages that are hosted through the element.
* @private
* @param {?} element
* @return {?}
*/
_removeCdkDescribedByReferenceIds(element) {
// Remove all aria-describedby reference IDs that are prefixed by CDK_DESCRIBEDBY_ID_PREFIX
/** @type {?} */
const originalReferenceIds = getAriaReferenceIds(element, 'aria-describedby')
.filter((/**
* @param {?} id
* @return {?}
*/
id => id.indexOf(CDK_DESCRIBEDBY_ID_PREFIX) != 0));
element.setAttribute('aria-describedby', originalReferenceIds.join(' '));
}
/**
* Adds a message reference to the element using aria-describedby and increments the registered
* message's reference count.
* @private
* @param {?} element
* @param {?} message
* @return {?}
*/
_addMessageReference(element, message) {
/** @type {?} */
const registeredMessage = (/** @type {?} */ (messageRegistry.get(message)));
// Add the aria-describedby reference and set the
// describedby_host attribute to mark the element.
addAriaReferencedId(element, 'aria-describedby', registeredMessage.messageElement.id);
element.setAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE, '');
registeredMessage.referenceCount++;
}
/**
* Removes a message reference from the element using aria-describedby
* and decrements the registered message's reference count.
* @private
* @param {?} element
* @param {?} message
* @return {?}
*/
_removeMessageReference(element, message) {
/** @type {?} */
const registeredMessage = (/** @type {?} */ (messageRegistry.get(message)));
registeredMessage.referenceCount--;
removeAriaReferencedId(element, 'aria-describedby', registeredMessage.messageElement.id);
element.removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);
}
/**
* Returns true if the element has been described by the provided message ID.
* @private
* @param {?} element
* @param {?} message
* @return {?}
*/
_isElementDescribedByMessage(element, message) {
/** @type {?} */
const referenceIds = getAriaReferenceIds(element, 'aria-describedby');
/** @type {?} */
const registeredMessage = messageRegistry.get(message);
/** @type {?} */
const messageId = registeredMessage && registeredMessage.messageElement.id;
return !!messageId && referenceIds.indexOf(messageId) != -1;
}
/**
* Determines whether a message can be described on a particular element.
* @private
* @param {?} element
* @param {?} message
* @return {?}
*/
_canBeDescribed(element, message) {
if (!this._isElementNode(element)) {
return false;
}
if (message && typeof message === 'object') {
// We'd have to make some assumptions about the description element's text, if the consumer
// passed in an element. Assume that if an element is passed in, the consumer has verified
// that it can be used as a description.
return true;
}
/** @type {?} */
const trimmedMessage = message == null ? '' : `${message}`.trim();
/** @type {?} */
const ariaLabel = element.getAttribute('aria-label');
// We shouldn't set descriptions if they're exactly the same as the `aria-label` of the
// element, because screen readers will end up reading out the same text twice in a row.
return trimmedMessage ? (!ariaLabel || ariaLabel.trim() !== trimmedMessage) : false;
}
/**
* Checks whether a node is an Element node.
* @private
* @param {?} element
* @return {?}
*/
_isElementNode(element) {
return element.nodeType === this._document.ELEMENT_NODE;
}
}
AriaDescriber.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] },
];
/** @nocollapse */
AriaDescriber.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
/** @nocollapse */ AriaDescriber.ngInjectableDef = ɵɵdefineInjectable({ factory: function AriaDescriber_Factory() { return new AriaDescriber(ɵɵinject(DOCUMENT)); }, token: AriaDescriber, providedIn: "root" });
/**
* \@docs-private \@deprecated \@breaking-change 8.0.0
* @param {?} parentDispatcher
* @param {?} _document
* @return {?}
*/
function ARIA_DESCRIBER_PROVIDER_FACTORY(parentDispatcher, _document) {
return parentDispatcher || new AriaDescriber(_document);
}
/**
* \@docs-private \@deprecated \@breaking-change 8.0.0
* @type {?}
*/
const ARIA_DESCRIBER_PROVIDER = {
// If there is already an AriaDescriber available, use that. Otherwise, provide a new one.
provide: AriaDescriber,
deps: [
[new Optional(), new SkipSelf(), AriaDescriber],
(/** @type {?} */ (DOCUMENT))
],
useFactory: ARIA_DESCRIBER_PROVIDER_FACTORY
};
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* This class manages keyboard events for selectable lists. If you pass it a query list
* of items, it will set the active item correctly when arrow events occur.
* @template T
*/
class ListKeyManager {
/**
* @param {?} _items
*/
constructor(_items) {
this._items = _items;
this._activeItemIndex = -1;
this._activeItem = null;
this._wrap = false;
this._letterKeyStream = new Subject();
this._typeaheadSubscription = Subscription.EMPTY;
this._vertical = true;
this._allowedModifierKeys = [];
/**
* Predicate function that can be used to check whether an item should be skipped
* by the key manager. By default, disabled items are skipped.
*/
this._skipPredicateFn = (/**
* @param {?} item
* @return {?}
*/
(item) => item.disabled);
// Buffer for the letters that the user has pressed when the typeahead option is turned on.
this._pressedLetters = [];
/**
* Stream that emits any time the TAB key is pressed, so components can react
* when focus is shifted off of the list.
*/
this.tabOut = new Subject();
/**
* Stream that emits whenever the active item of the list manager changes.
*/
this.change = new Subject();
// We allow for the items to be an array because, in some cases, the consumer may
// not have access to a QueryList of the items they want to manage (e.g. when the
// items aren't being collected via `ViewChildren` or `ContentChildren`).
if (_items instanceof QueryList) {
_items.changes.subscribe((/**
* @param {?} newItems
* @return {?}
*/
(newItems) => {
if (this._activeItem) {
/** @type {?} */
const itemArray = newItems.toArray();
/** @type {?} */
const newIndex = itemArray.indexOf(this._activeItem);
if (newIndex > -1 && newIndex !== this._activeItemIndex) {
this._activeItemIndex = newIndex;
}
}
}));
}
}
/**
* Sets the predicate function that determines which items should be skipped by the
* list key manager.
* @template THIS
* @this {THIS}
* @param {?} predicate Function that determines whether the given item should be skipped.
* @return {THIS}
*/
skipPredicate(predicate) {
(/** @type {?} */ (this))._skipPredicateFn = predicate;
return (/** @type {?} */ (this));
}
/**
* Configures wrapping mode, which determines whether the active item will wrap to
* the other end of list when there are no more items in the given direction.
* @template THIS
* @this {THIS}
* @param {?=} shouldWrap Whether the list should wrap when reaching the end.
* @return {THIS}
*/
withWrap(shouldWrap = true) {
(/** @type {?} */ (this))._wrap = shouldWrap;
return (/** @type {?} */ (this));
}
/**
* Configures whether the key manager should be able to move the selection vertically.
* @template THIS
* @this {THIS}
* @param {?=} enabled Whether vertical selection should be enabled.
* @return {THIS}
*/
withVerticalOrientation(enabled = true) {
(/** @type {?} */ (this))._vertical = enabled;
return (/** @type {?} */ (this));
}
/**
* Configures the key manager to move the selection horizontally.
* Passing in `null` will disable horizontal movement.
* @template THIS
* @this {THIS}
* @param {?} direction Direction in which the selection can be moved.
* @return {THIS}
*/
withHorizontalOrientation(direction) {
(/** @type {?} */ (this))._horizontal = direction;
return (/** @type {?} */ (this));
}
/**
* Modifier keys which are allowed to be held down and whose default actions will be prevented
* as the user is pressing the arrow keys. Defaults to not allowing any modifier keys.
* @template THIS
* @this {THIS}
* @param {?} keys
* @return {THIS}
*/
withAllowedModifierKeys(keys) {
(/** @type {?} */ (this))._allowedModifierKeys = keys;
return (/** @type {?} */ (this));
}
/**
* Turns on typeahead mode which allows users to set the active item by typing.
* @template THIS
* @this {THIS}
* @param {?=} debounceInterval Time to wait after the last keystroke before setting the active item.
* @return {THIS}
*/
withTypeAhead(debounceInterval = 200) {
if ((/** @type {?} */ (this))._items.length && (/** @type {?} */ (this))._items.some((/**
* @param {?} item
* @return {?}
*/
item => typeof item.getLabel !== 'function'))) {
throw Error('ListKeyManager items in typeahead mode must implement the `getLabel` method.');
}
(/** @type {?} */ (this))._typeaheadSubscription.unsubscribe();
// Debounce the presses of non-navigational keys, collect the ones that correspond to letters
// and convert those letters back into a string. Afterwards find the first item that starts
// with that string and select it.
(/** @type {?} */ (this))._typeaheadSubscription = (/** @type {?} */ (this))._letterKeyStream.pipe(tap((/**
* @param {?} keyCode
* @return {?}
*/
keyCode => (/** @type {?} */ (this))._pressedLetters.push(keyCode))), debounceTime(debounceInterval), filter((/**
* @return {?}
*/
() => (/** @type {?} */ (this))._pressedLetters.length > 0)), map((/**
* @return {?}
*/
() => (/** @type {?} */ (this))._pressedLetters.join('')))).subscribe((/**
* @param {?} inputString
* @return {?}
*/
inputString => {
/** @type {?} */
const items = (/** @type {?} */ (this))._getItemsArray();
// Start at 1 because we want to start searching at the item immediately
// following the current active item.
for (let i = 1; i < items.length + 1; i++) {
/** @type {?} */
const index = ((/** @type {?} */ (this))._activeItemIndex + i) % items.length;
/** @type {?} */
const item = items[index];
if (!(/** @type {?} */ (this))._skipPredicateFn(item) &&
(/** @type {?} */ (item.getLabel))().toUpperCase().trim().indexOf(inputString) === 0) {
(/** @type {?} */ (this)).setActiveItem(index);
break;
}
}
(/** @type {?} */ (this))._pressedLetters = [];
}));
return (/** @type {?} */ (this));
}
/**
* @param {?} item
* @return {?}
*/
setActiveItem(item) {
/** @type {?} */
const previousIndex = this._activeItemIndex;
this.updateActiveItem(item);
if (this._activeItemIndex !== previousIndex) {
this.change.next(this._activeItemIndex);
}
}
/**
* Sets the active item depending on the key event passed in.
* @param {?} event Keyboard event to be used for determining which element should be active.
* @return {?}
*/
onKeydown(event) {
/** @type {?} */
const keyCode = event.keyCode;
/** @type {?} */
const modifiers = ['altKey', 'ctrlKey', 'metaKey', 'shiftKey'];
/** @type {?} */
const isModifierAllowed = modifiers.every((/**
* @param {?} modifier
* @return {?}
*/
modifier => {
return !event[modifier] || this._allowedModifierKeys.indexOf(modifier) > -1;
}));
switch (keyCode) {
case TAB:
this.tabOut.next();
return;
case DOWN_ARROW:
if (this._vertical && isModifierAllowed) {
this.setNextItemActive();
break;
}
else {
return;
}
case UP_ARROW:
if (this._vertical && isModifierAllowed) {
this.setPreviousItemActive();
break;
}
else {
return;
}
case RIGHT_ARROW:
if (this._horizontal && isModifierAllowed) {
this._horizontal === 'rtl' ? this.setPreviousItemActive() : this.setNextItemActive();
break;
}
else {
return;
}
case LEFT_ARROW:
if (this._horizontal && isModifierAllowed) {
this._horizontal === 'rtl' ? this.setNextItemActive() : this.setPreviousItemActive();
break;
}
else {
return;
}
default:
if (isModifierAllowed || hasModifierKey(event, 'shiftKey')) {
// Attempt to use the `event.key` which also maps it to the user's keyboard language,
// otherwise fall back to resolving alphanumeric characters via the keyCode.
if (event.key && event.key.length === 1) {
this._letterKeyStream.next(event.key.toLocaleUpperCase());
}
else if ((keyCode >= A && keyCode <= Z) || (keyCode >= ZERO && keyCode <= NINE)) {
this._letterKeyStream.next(String.fromCharCode(keyCode));
}
}
// Note that we return here, in order to avoid preventing
// the default action of non-navigational keys.
return;
}
this._pressedLetters = [];
event.preventDefault();
}
/**
* Index of the currently active item.
* @return {?}
*/
get activeItemIndex() {
return this._activeItemIndex;
}
/**
* The active item.
* @return {?}
*/
get activeItem() {
return this._activeItem;
}
/**
* Sets the active item to the first enabled item in the list.
* @return {?}
*/
setFirstItemActive() {
this._setActiveItemByIndex(0, 1);
}
/**
* Sets the active item to the last enabled item in the list.
* @return {?}
*/
setLastItemActive() {
this._setActiveItemByIndex(this._items.length - 1, -1);
}
/**
* Sets the active item to the next enabled item in the list.
* @return {?}
*/
setNextItemActive() {
this._activeItemIndex < 0 ? this.setFirstItemActive() : this._setActiveItemByDelta(1);
}
/**
* Sets the active item to a previous enabled item in the list.
* @return {?}
*/
setPreviousItemActive() {
this._activeItemIndex < 0 && this._wrap ? this.setLastItemActive()
: this._setActiveItemByDelta(-1);
}
/**
* @param {?} item
* @return {?}
*/
updateActiveItem(item) {
/** @type {?} */
const itemArray = this._getItemsArray();
/** @type {?} */
const index = typeof item === 'number' ? item : itemArray.indexOf(item);
/** @type {?} */
const activeItem = itemArray[index];
// Explicitly check for `null` and `undefined` because other falsy values are valid.
this._activeItem = activeItem == null ? null : activeItem;
this._activeItemIndex = index;
}
/**
* Allows setting of the activeItemIndex without any other effects.
* @deprecated Use `updateActiveItem` instead.
* \@breaking-change 8.0.0
* @param {?} index The new activeItemIndex.
* @return {?}
*/
updateActiveItemIndex(index) {
this.updateActiveItem(index);
}
/**
* This method sets the active item, given a list of items and the delta between the
* currently active item and the new active item. It will calculate differently
* depending on whether wrap mode is turned on.
* @private
* @param {?} delta
* @return {?}
*/
_setActiveItemByDelta(delta) {
this._wrap ? this._setActiveInWrapMode(delta) : this._setActiveInDefaultMode(delta);
}
/**
* Sets the active item properly given "wrap" mode. In other words, it will continue to move
* down the list until it finds an item that is not disabled, and it will wrap if it
* encounters either end of the list.
* @private
* @param {?} delta
* @return {?}
*/
_setActiveInWrapMode(delta) {
/** @type {?} */
const items = this._getItemsArray();
for (let i = 1; i <= items.length; i++) {
/** @type {?} */
const index = (this._activeItemIndex + (delta * i) + items.length) % items.length;
/** @type {?} */
const item = items[index];
if (!this._skipPredicateFn(item)) {
this.setActiveItem(index);
return;
}
}
}
/**
* Sets the active item properly given the default mode. In other words, it will
* continue to move down the list until it finds an item that is not disabled. If
* it encounters either end of the list, it will stop and not wrap.
* @private
* @param {?} delta
* @return {?}
*/
_setActiveInDefaultMode(delta) {
this._setActiveItemByIndex(this._activeItemIndex + delta, delta);
}
/**
* Sets the active item to the first enabled item starting at the index specified. If the
* item is disabled, it will move in the fallbackDelta direction until it either
* finds an enabled item or encounters the end of the list.
* @private
* @param {?} index
* @param {?} fallbackDelta
* @return {?}
*/
_setActiveItemByIndex(index, fallbackDelta) {
/** @type {?} */
const items = this._getItemsArray();
if (!items[index]) {
return;
}
while (this._skipPredicateFn(items[index])) {
index += fallbackDelta;
if (!items[index]) {
return;
}
}
this.setActiveItem(index);
}
/**
* Returns the items as an array.
* @private
* @return {?}
*/
_getItemsArray() {
return this._items instanceof QueryList ? this._items.toArray() : this._items;
}
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @template T
*/
class ActiveDescendantKeyManager extends ListKeyManager {
/**
* @param {?} index
* @return {?}
*/
setActiveItem(index) {
if (this.activeItem) {
this.activeItem.setInactiveStyles();
}
super.setActiveItem(index);
if (this.activeItem) {
this.activeItem.setActiveStyles();
}
}
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @template T
*/
class FocusKeyManager extends ListKeyManager {
constructor() {
super(...arguments);
this._origin = 'program';
}
/**
* Sets the focus origin that will be passed in to the items for any subsequent `focus` calls.
* @template THIS
* @this {THIS}
* @param {?} origin Focus origin to be used when focusing items.
* @return {THIS}
*/
setFocusOrigin(origin) {
(/** @type {?} */ (this))._origin = origin;
return (/** @type {?} */ (this));
}
/**
* @param {?} item
* @return {?}
*/
setActiveItem(item) {
super.setActiveItem(item);
if (this.activeItem) {
this.activeItem.focus(this._origin);
}
}
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
// The InteractivityChecker leans heavily on the ally.js accessibility utilities.
// Methods like `isTabbable` are only covering specific edge-cases for the browsers which are
// supported.
/**
* Utility for checking the interactivity of an element, such as whether is is focusable or
* tabbable.
*/
class InteractivityChecker {
/**
* @param {?} _platform
*/
constructor(_platform) {
this._platform = _platform;
}
/**
* Gets whether an element is disabled.
*
* @param {?} element Element to be checked.
* @return {?} Whether the element is disabled.
*/
isDisabled(element) {
// This does not capture some cases, such as a non-form control with a disabled attribute or
// a form control inside of a disabled form, but should capture the most common cases.
return element.hasAttribute('disabled');
}
/**
* Gets whether an element is visible for the purposes of interactivity.
*
* This will capture states like `display: none` and `visibility: hidden`, but not things like
* being clipped by an `overflow: hidden` parent or being outside the viewport.
*
* @param {?} element
* @return {?} Whether the element is visible.
*/
isVisible(element) {
return hasGeometry(element) && getComputedStyle(element).visibility === 'visible';
}
/**
* Gets whether an element can be reached via Tab key.
* Assumes that the element has already been checked with isFocusable.
*
* @param {?} element Element to be checked.
* @return {?} Whether the element is tabbable.
*/
isTabbable(element) {
// Nothing is tabbable on the server 😎
if (!this._platform.isBrowser) {
return false;
}
/** @type {?} */
const frameElement = getFrameElement(getWindow(element));
if (frameElement) {
/** @type {?} */
const frameType = frameElement && frameElement.nodeName.toLowerCase();
// Frame elements inherit their tabindex onto all child elements.
if (getTabIndexValue(frameElement) === -1) {
return false;
}
// Webkit and Blink consider anything inside of an <object> element as non-tabbable.
if ((this._platform.BLINK || this._platform.WEBKIT) && frameType === 'object') {
return false;
}
// Webkit and Blink disable tabbing to an element inside of an invisible frame.
if ((this._platform.BLINK || this._platform.WEBKIT) && !this.isVisible(frameElement)) {
return false;
}
}
/** @type {?} */
let nodeName = element.nodeName.toLowerCase();
/** @type {?} */
let tabIndexValue = getTabIndexValue(element);
if (element.hasAttribute('contenteditable')) {
return tabIndexValue !== -1;
}
if (nodeName === 'iframe') {
// The frames may be tabbable depending on content, but it's not possibly to reliably
// investigate the content of the frames.
return false;
}
if (nodeName === 'audio') {
if (!element.hasAttribute('controls')) {
// By default an <audio> element without the controls enabled is not tabbable.
return false;
}
else if (this._platform.BLINK) {
// In Blink <audio controls> elements are always tabbable.
return true;
}
}
if (nodeName === 'video') {
if (!element.hasAttribute('controls') && this._platform.TRIDENT) {
// In Trident a <video> element without the controls enabled is not tabbable.
return false;
}
else if (this._platform.BLINK || this._platform.FIREFOX) {
// In Chrome and Firefox <video controls> elements are always tabbable.
return true;
}
}
if (nodeName === 'object' && (this._platform.BLINK || this._platform.WEBKIT)) {
// In all Blink and WebKit based browsers <object> elements are never tabbable.
return false;
}
// In iOS the browser only considers some specific elements as tabbable.
if (this._platform.WEBKIT && this._platform.IOS && !isPotentiallyTabbableIOS(element)) {
return false;
}
return element.tabIndex >= 0;
}
/**
* Gets whether an element can be focused by the user.
*
* @param {?} element Element to be checked.
* @return {?} Whether the element is focusable.
*/
isFocusable(element) {
// Perform checks in order of left to most expensive.
// Again, naive approach that does not capture many edge cases and browser quirks.
return isPotentiallyFocusable(element) && !this.isDisabled(element) && this.isVisible(element);
}
}
InteractivityChecker.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] },
];
/** @nocollapse */
InteractivityChecker.ctorParameters = () => [
{ type: Platform }
];
/** @nocollapse */ InteractivityChecker.ngInjectableDef = ɵɵdefineInjectable({ factory: function InteractivityChecker_Factory() { return new InteractivityChecker(ɵɵinject(Platform)); }, token: InteractivityChecker, providedIn: "root" });
/**
* Returns the frame element from a window object. Since browsers like MS Edge throw errors if
* the frameElement property is being accessed from a different host address, this property
* should be accessed carefully.
* @param {?} window
* @return {?}
*/
function getFrameElement(window) {
try {
return (/** @type {?} */ (window.frameElement));
}
catch (_a) {
return null;
}
}
/**
* Checks whether the specified element has any geometry / rectangles.
* @param {?} element
* @return {?}
*/
function hasGeometry(element) {
// Use logic from jQuery to check for an invisible element.
// See https://github.com/jquery/jquery/blob/master/src/css/hiddenVisibleSelectors.js#L12
return !!(element.offsetWidth || element.offsetHeight ||
(typeof element.getClientRects === 'function' && element.getClientRects().length));
}
/**
* Gets whether an element's
* @param {?} element
* @return {?}
*/
function isNativeFormElement(element) {
/** @type {?} */
let nodeName = element.nodeName.toLowerCase();
return nodeName === 'input' ||
nodeName === 'select' ||
nodeName === 'button' ||
nodeName === 'textarea';
}
/**
* Gets whether an element is an `<input type="hidden">`.
* @param {?} element
* @return {?}
*/
function isHiddenInput(element) {
return isInputElement(element) && element.type == 'hidden';
}
/**
* Gets whether an element is an anchor that has an href attribute.
* @param {?} element
* @return {?}
*/
function isAnchorWithHref(element) {
return isAnchorElement(element) && element.hasAttribute('href');
}
/**
* Gets whether an element is an input element.
* @param {?} element
* @return {?}
*/
function isInputElement(element) {
return element.nodeName.toLowerCase() == 'input';
}
/**
* Gets whether an element is an anchor element.
* @param {?} element
* @return {?}
*/
function isAnchorElement(element) {
return element.nodeName.toLowerCase() == 'a';
}
/**
* Gets whether an element has a valid tabindex.
* @param {?} element
* @return {?}
*/
function hasValidTabIndex(element) {
if (!element.hasAttribute('tabindex') || element.tabIndex === undefined) {
return false;
}
/** @type {?} */
let tabIndex = element.getAttribute('tabindex');
// IE11 parses tabindex="" as the value "-32768"
if (tabIndex == '-32768') {
return false;
}
return !!(tabIndex && !isNaN(parseInt(tabIndex, 10)));
}
/**
* Returns the parsed tabindex from the element attributes instead of returning the
* evaluated tabindex from the browsers defaults.
* @param {?} element
* @return {?}
*/
function getTabIndexValue(element) {
if (!hasValidTabIndex(element)) {
return null;
}
// See browser issue in Gecko https://bugzilla.mozilla.org/show_bug.cgi?id=1128054
/** @type {?} */
const tabIndex = parseInt(element.getAttribute('tabindex') || '', 10);
return isNaN(tabIndex) ? -1 : tabIndex;
}
/**
* Checks whether the specified element is potentially tabbable on iOS
* @param {?} element
* @return {?}
*/
function isPotentiallyTabbableIOS(element) {
/** @type {?} */
let nodeName = element.nodeName.toLowerCase();
/** @type {?} */
let inputType = nodeName === 'input' && ((/** @type {?} */ (element))).type;
return inputType === 'text'
|| inputType === 'password'
|| nodeName === 'select'
|| nodeName === 'textarea';
}
/**
* Gets whether an element is potentially focusable without taking current visible/disabled state
* into account.
* @param {?} element
* @return {?}
*/
function isPotentiallyFocusable(element) {
// Inputs are potentially focusable *unless* they're type="hidden".
if (isHiddenInput(element)) {
return false;
}
return isNativeFormElement(element) ||
isAnchorWithHref(element) ||
element.hasAttribute('contenteditable') ||
hasValidTabIndex(element);
}
/**
* Gets the parent window of a DOM node with regards of being inside of an iframe.
* @param {?} node
* @return {?}
*/
function getWindow(node) {
// ownerDocument is null if `node` itself *is* a document.
return node.ownerDocument && node.ownerDocument.defaultView || window;
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* Class that allows for trapping focus within a DOM element.
*
* This class currently uses a relatively simple approach to focus trapping.
* It assumes that the tab order is the same as DOM order, which is not necessarily true.
* Things like `tabIndex > 0`, flex `order`, and shadow roots can cause to two to misalign.
*/
class FocusTrap {
/**
* @param {?} _element
* @param {?} _checker
* @param {?} _ngZone
* @param {?} _document
* @param {?=} deferAnchors
*/
constructor(_element, _checker, _ngZone, _document, deferAnchors = false) {
this._element = _element;
this._checker = _checker;
this._ngZone = _ngZone;
this._document = _document;
this._hasAttached = false;
// Event listeners for the anchors. Need to be regular functions so that we can unbind them later.
this.startAnchorListener = (/**
* @return {?}
*/
() => this.focusLastTabbableElement());
this.endAnchorListener = (/**
* @return {?}
*/
() => this.focusFirstTabbableElement());
this._enabled = true;
if (!deferAnchors) {
this.attachAnchors();
}
}
/**
* Whether the focus trap is active.
* @return {?}
*/
get enabled() { return this._enabled; }
/**
* @param {?} value
* @return {?}
*/
set enabled(value) {
this._enabled = value;
if (this._startAnchor && this._endAnchor) {
this._toggleAnchorTabIndex(value, this._startAnchor);
this._toggleAnchorTabIndex(value, this._endAnchor);
}
}
/**
* Destroys the focus trap by cleaning up the anchors.
* @return {?}
*/
destroy() {
/** @type {?} */
const startAnchor = this._startAnchor;
/** @type {?} */
const endAnchor = this._endAnchor;
if (startAnchor) {
startAnchor.removeEventListener('focus', this.startAnchorListener);
if (startAnchor.parentNode) {
startAnchor.parentNode.removeChild(startAnchor);
}
}
if (endAnchor) {
endAnchor.removeEventListener('focus', this.endAnchorListener);
if (endAnchor.parentNode) {
endAnchor.parentNode.removeChild(endAnchor);
}
}
this._startAnchor = this._endAnchor = null;
}
/**
* Inserts the anchors into the DOM. This is usually done automatically
* in the constructor, but can be deferred for cases like directives with `*ngIf`.
* @return {?} Whether the focus trap managed to attach successfuly. This may not be the case
* if the target element isn't currently in the DOM.
*/
attachAnchors() {
// If we're not on the browser, there can be no focus to trap.
if (this._hasAttached) {
return true;
}
this._ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
if (!this._startAnchor) {
this._startAnchor = this._createAnchor();
(/** @type {?} */ (this._startAnchor)).addEventListener('focus', this.startAnchorListener);
}
if (!this._endAnchor) {
this._endAnchor = this._createAnchor();
(/** @type {?} */ (this._endAnchor)).addEventListener('focus', this.endAnchorListener);
}
}));
if (this._element.parentNode) {
this._element.parentNode.insertBefore((/** @type {?} */ (this._startAnchor)), this._element);
this._element.parentNode.insertBefore((/** @type {?} */ (this._endAnchor)), this._element.nextSibling);
this._hasAttached = true;
}
return this._hasAttached;
}
/**
* Waits for the zone to stabilize, then either focuses the first element that the
* user specified, or the first tabbable element.
* @return {?} Returns a promise that resolves with a boolean, depending
* on whether focus was moved successfuly.
*/
focusInitialElementWhenReady() {
return new Promise((/**
* @param {?} resolve
* @return {?}
*/
resolve => {
this._executeOnStable((/**
* @return {?}
*/
() => resolve(this.focusInitialElement())));
}));
}
/**
* Waits for the zone to stabilize, then focuses
* the first tabbable element within the focus trap region.
* @return {?} Returns a promise that resolves with a boolean, depending
* on whether focus was moved successfuly.
*/
focusFirstTabbableElementWhenReady() {
return new Promise((/**
* @param {?} resolve
* @return {?}
*/
resolve => {
this._executeOnStable((/**
* @return {?}
*/
() => resolve(this.focusFirstTabbableElement())));
}));
}
/**
* Waits for the zone to stabilize, then focuses
* the last tabbable element within the focus trap region.
* @return {?} Returns a promise that resolves with a boolean, depending
* on whether focus was moved successfuly.
*/
focusLastTabbableElementWhenReady() {
return new Promise((/**
* @param {?} resolve
* @return {?}
*/
resolve => {
this._executeOnStable((/**
* @return {?}
*/
() => resolve(this.focusLastTabbableElement())));
}));
}
/**
* Get the specified boundary element of the trapped region.
* @private
* @param {?} bound The boundary to get (start or end of trapped region).
* @return {?} The boundary element.
*/
_getRegionBoundary(bound) {
// Contains the deprecated version of selector, for temporary backwards comparability.
/** @type {?} */
let markers = (/** @type {?} */ (this._element.querySelectorAll(`[cdk-focus-region-${bound}], ` +
`[cdkFocusRegion${bound}], ` +
`[cdk-focus-${bound}]`)));
for (let i = 0; i < markers.length; i++) {
// @breaking-change 8.0.0
if (markers[i].hasAttribute(`cdk-focus-${bound}`)) {
console.warn(`Found use of deprecated attribute 'cdk-focus-${bound}', ` +
`use 'cdkFocusRegion${bound}' instead. The deprecated ` +
`attribute will be removed in 8.0.0.`, markers[i]);
}
else if (markers[i].hasAttribute(`cdk-focus-region-${bound}`)) {
console.warn(`Found use of deprecated attribute 'cdk-focus-region-${bound}', ` +
`use 'cdkFocusRegion${bound}' instead. The deprecated attribute ` +
`will be removed in 8.0.0.`, markers[i]);
}
}
if (bound == 'start') {
return markers.length ? markers[0] : this._getFirstTabbableElement(this._element);
}
return markers.length ?
markers[markers.length - 1] : this._getLastTabbableElement(this._element);
}
/**
* Focuses the element that should be focused when the focus trap is initialized.
* @return {?} Whether focus was moved successfuly.
*/
focusInitialElement() {
// Contains the deprecated version of selector, for temporary backwards comparability.
/** @type {?} */
const redirectToElement = (/** @type {?} */ (this._element.querySelector(`[cdk-focus-initial], ` +
`[cdkFocusInitial]`)));
if (redirectToElement) {
// @breaking-change 8.0.0
if (redirectToElement.hasAttribute(`cdk-focus-initial`)) {
console.warn(`Found use of deprecated attribute 'cdk-focus-initial', ` +
`use 'cdkFocusInitial' instead. The deprecated attribute ` +
`will be removed in 8.0.0`, redirectToElement);
}
// Warn the consumer if the element they've pointed to
// isn't focusable, when not in production mode.
if (isDevMode() && !this._checker.isFocusable(redirectToElement)) {
console.warn(`Element matching '[cdkFocusInitial]' is not focusable.`, redirectToElement);
}
redirectToElement.focus();
return true;
}
return this.focusFirstTabbableElement();
}
/**
* Focuses the first tabbable element within the focus trap region.
* @return {?} Whether focus was moved successfuly.
*/
focusFirstTabbableElement() {
/** @type {?} */
const redirectToElement = this._getRegionBoundary('start');
if (redirectToElement) {
redirectToElement.focus();
}
return !!redirectToElement;
}
/**
* Focuses the last tabbable element within the focus trap region.
* @return {?} Whether focus was moved successfuly.
*/
focusLastTabbableElement() {
/** @type {?} */
const redirectToElement = this._getRegionBoundary('end');
if (redirectToElement) {
redirectToElement.focus();
}
return !!redirectToElement;
}
/**
* Checks whether the focus trap has successfuly been attached.
* @return {?}
*/
hasAttached() {
return this._hasAttached;
}
/**
* Get the first tabbable element from a DOM subtree (inclusive).
* @private
* @param {?} root
* @return {?}
*/
_getFirstTabbableElement(root) {
if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {
return root;
}
// Iterate in DOM order. Note that IE doesn't have `children` for SVG so we fall
// back to `childNodes` which includes text nodes, comments etc.
/** @type {?} */
let children = root.children || root.childNodes;
for (let i = 0; i < children.length; i++) {
/** @type {?} */
let tabbableChild = children[i].nodeType === this._document.ELEMENT_NODE ?
this._getFirstTabbableElement((/** @type {?} */ (children[i]))) :
null;
if (tabbableChild) {
return tabbableChild;
}
}
return null;
}
/**
* Get the last tabbable element from a DOM subtree (inclusive).
* @private
* @param {?} root
* @return {?}
*/
_getLastTabbableElement(root) {
if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {
return root;
}
// Iterate in reverse DOM order.
/** @type {?} */
let children = root.children || root.childNodes;
for (let i = children.length - 1; i >= 0; i--) {
/** @type {?} */
let tabbableChild = children[i].nodeType === this._document.ELEMENT_NODE ?
this._getLastTabbableElement((/** @type {?} */ (children[i]))) :
null;
if (tabbableChild) {
return tabbableChild;
}
}
return null;
}
/**
* Creates an anchor element.
* @private
* @return {?}
*/
_createAnchor() {
/** @type {?} */
const anchor = this._document.createElement('div');
this._toggleAnchorTabIndex(this._enabled, anchor);
anchor.classList.add('cdk-visually-hidden');
anchor.classList.add('cdk-focus-trap-anchor');
anchor.setAttribute('aria-hidden', 'true');
return anchor;
}
/**
* Toggles the `tabindex` of an anchor, based on the enabled state of the focus trap.
* @private
* @param {?} isEnabled Whether the focus trap is enabled.
* @param {?} anchor Anchor on which to toggle the tabindex.
* @return {?}
*/
_toggleAnchorTabIndex(isEnabled, anchor) {
// Remove the tabindex completely, rather than setting it to -1, because if the
// element has a tabindex, the user might still hit it when navigating with the arrow keys.
isEnabled ? anchor.setAttribute('tabindex', '0') : anchor.removeAttribute('tabindex');
}
/**
* Executes a function when the zone is stable.
* @private
* @param {?} fn
* @return {?}
*/
_executeOnStable(fn) {
if (this._ngZone.isStable) {
fn();
}
else {
this._ngZone.onStable.asObservable().pipe(take(1)).subscribe(fn);
}
}
}
/**
* Factory that allows easy instantiation of focus traps.
*/
class FocusTrapFactory {
/**
* @param {?} _checker
* @param {?} _ngZone
* @param {?} _document
*/
constructor(_checker, _ngZone, _document) {
this._checker = _checker;
this._ngZone = _ngZone;
this._document = _document;
}
/**
* Creates a focus-trapped region around the given element.
* @param {?} element The element around which focus will be trapped.
* @param {?=} deferCaptureElements Defers the creation of focus-capturing elements to be done
* manually by the user.
* @return {?} The created focus trap instance.
*/
create(element, deferCaptureElements = false) {
return new FocusTrap(element, this._checker, this._ngZone, this._document, deferCaptureElements);
}
}
FocusTrapFactory.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] },
];
/** @nocollapse */
FocusTrapFactory.ctorParameters = () => [
{ type: InteractivityChecker },
{ type: NgZone },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
/** @nocollapse */ FocusTrapFactory.ngInjectableDef = ɵɵdefineInjectable({ factory: function FocusTrapFactory_Factory() { return new FocusTrapFactory(ɵɵinject(InteractivityChecker), ɵɵinject(NgZone), ɵɵinject(DOCUMENT)); }, token: FocusTrapFactory, providedIn: "root" });
/**
* Directive for trapping focus within a region.
*/
class CdkTrapFocus {
/**
* @param {?} _elementRef
* @param {?} _focusTrapFactory
* @param {?} _document
*/
constructor(_elementRef, _focusTrapFactory, _document) {
this._elementRef = _elementRef;
this._focusTrapFactory = _focusTrapFactory;
/**
* Previously focused element to restore focus to upon destroy when using autoCapture.
*/
this._previouslyFocusedElement = null;
this._document = _document;
this.focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement, true);
}
/**
* Whether the focus trap is active.
* @return {?}
*/
get enabled() { return this.focusTrap.enabled; }
/**
* @param {?} value
* @return {?}
*/
set enabled(value) { this.focusTrap.enabled = coerceBooleanProperty(value); }
/**
* Whether the directive should automatially move focus into the trapped region upon
* initialization and return focus to the previous activeElement upon destruction.
* @return {?}
*/
get autoCapture() { return this._autoCapture; }
/**
* @param {?} value
* @return {?}
*/
set autoCapture(value) { this._autoCapture = coerceBooleanProperty(value); }
/**
* @return {?}
*/
ngOnDestroy() {
this.focusTrap.destroy();
// If we stored a previously focused element when using autoCapture, return focus to that
// element now that the trapped region is being destroyed.
if (this._previouslyFocusedElement) {
this._previouslyFocusedElement.focus();
this._previouslyFocusedElement = null;
}
}
/**
* @return {?}
*/
ngAfterContentInit() {
this.focusTrap.attachAnchors();
if (this.autoCapture) {
this._previouslyFocusedElement = (/** @type {?} */ (this._document.activeElement));
this.focusTrap.focusInitialElementWhenReady();
}
}
/**
* @return {?}
*/
ngDoCheck() {
if (!this.focusTrap.hasAttached()) {
this.focusTrap.attachAnchors();
}
}
}
CdkTrapFocus.decorators = [
{ type: Directive, args: [{
selector: '[cdkTrapFocus]',
exportAs: 'cdkTrapFocus',
},] },
];
/** @nocollapse */
CdkTrapFocus.ctorParameters = () => [
{ type: ElementRef },
{ type: FocusTrapFactory },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] }
];
CdkTrapFocus.propDecorators = {
enabled: [{ type: Input, args: ['cdkTrapFocus',] }],
autoCapture: [{ type: Input, args: ['cdkTrapFocusAutoCapture',] }]
};
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/** @type {?} */
const LIVE_ANNOUNCER_ELEMENT_TOKEN = new InjectionToken('liveAnnouncerElement', {
providedIn: 'root',
factory: LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY,
});
/**
* \@docs-private
* @return {?}
*/
function LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY() {
return null;
}
/**
* Injection token that can be used to configure the default options for the LiveAnnouncer.
* @type {?}
*/
const LIVE_ANNOUNCER_DEFAULT_OPTIONS = new InjectionToken('LIVE_ANNOUNCER_DEFAULT_OPTIONS');
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
class LiveAnnouncer {
/**
* @param {?} elementToken
* @param {?} _ngZone
* @param {?} _document
* @param {?=} _defaultOptions
*/
constructor(elementToken, _ngZone, _document, _defaultOptions) {
this._ngZone = _ngZone;
this._defaultOptions = _defaultOptions;
// We inject the live element and document as `any` because the constructor signature cannot
// reference browser globals (HTMLElement, Document) on non-browser environments, since having
// a class decorator causes TypeScript to preserve the constructor signature types.
this._document = _document;
this._liveElement = elementToken || this._createLiveElement();
}
/**
* @param {?} message
* @param {...?} args
* @return {?}
*/
announce(message, ...args) {
/** @type {?} */
const defaultOptions = this._defaultOptions;
/** @type {?} */
let politeness;
/** @type {?} */
let duration;
if (args.length === 1 && typeof args[0] === 'number') {
duration = args[0];
}
else {
[politeness, duration] = args;
}
this.clear();
clearTimeout(this._previousTimeout);
if (!politeness) {
politeness =
(defaultOptions && defaultOptions.politeness) ? defaultOptions.politeness : 'polite';
}
if (duration == null && defaultOptions) {
duration = defaultOptions.duration;
}
// TODO: ensure changing the politeness works on all environments we support.
this._liveElement.setAttribute('aria-live', politeness);
// This 100ms timeout is necessary for some browser + screen-reader combinations:
// - Both JAWS and NVDA over IE11 will not announce anything without a non-zero timeout.
// - With Chrome and IE11 with NVDA or JAWS, a repeated (identical) message won't be read a
// second time without clearing and then using a non-zero delay.
// (using JAWS 17 at time of this writing).
return this._ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
return new Promise((/**
* @param {?} resolve
* @return {?}
*/
resolve => {
clearTimeout(this._previousTimeout);
this._previousTimeout = setTimeout((/**
* @return {?}
*/
() => {
this._liveElement.textContent = message;
resolve();
if (typeof duration === 'number') {
this._previousTimeout = setTimeout((/**
* @return {?}
*/
() => this.clear()), duration);
}
}), 100);
}));
}));
}
/**
* Clears the current text from the announcer element. Can be used to prevent
* screen readers from reading the text out again while the user is going
* through the page landmarks.
* @return {?}
*/
clear() {
if (this._liveElement) {
this._liveElement.textContent = '';
}
}
/**
* @return {?}
*/
ngOnDestroy() {
clearTimeout(this._previousTimeout);
if (this._liveElement && this._liveElement.parentNode) {
this._liveElement.parentNode.removeChild(this._liveElement);
this._liveElement = (/** @type {?} */ (null));
}
}
/**
* @private
* @return {?}
*/
_createLiveElement() {
/** @type {?} */
const elementClass = 'cdk-live-announcer-element';
/** @type {?} */
const previousElements = this._document.getElementsByClassName(elementClass);
/** @type {?} */
const liveEl = this._document.createElement('div');
// Remove any old containers. This can happen when coming in from a server-side-rendered page.
for (let i = 0; i < previousElements.length; i++) {
(/** @type {?} */ (previousElements[i].parentNode)).removeChild(previousElements[i]);
}
liveEl.classList.add(elementClass);
liveEl.classList.add('cdk-visually-hidden');
liveEl.setAttribute('aria-atomic', 'true');
liveEl.setAttribute('aria-live', 'polite');
this._document.body.appendChild(liveEl);
return liveEl;
}
}
LiveAnnouncer.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] },
];
/** @nocollapse */
LiveAnnouncer.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [LIVE_ANNOUNCER_ELEMENT_TOKEN,] }] },
{ type: NgZone },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [LIVE_ANNOUNCER_DEFAULT_OPTIONS,] }] }
];
/** @nocollapse */ LiveAnnouncer.ngInjectableDef = ɵɵdefineInjectable({ factory: function LiveAnnouncer_Factory() { return new LiveAnnouncer(ɵɵinject(LIVE_ANNOUNCER_ELEMENT_TOKEN, 8), ɵɵinject(NgZone), ɵɵinject(DOCUMENT), ɵɵinject(LIVE_ANNOUNCER_DEFAULT_OPTIONS, 8)); }, token: LiveAnnouncer, providedIn: "root" });
/**
* A directive that works similarly to aria-live, but uses the LiveAnnouncer to ensure compatibility
* with a wider range of browsers and screen readers.
*/
class CdkAriaLive {
/**
* @param {?} _elementRef
* @param {?} _liveAnnouncer
* @param {?} _contentObserver
* @param {?} _ngZone
*/
constructor(_elementRef, _liveAnnouncer, _contentObserver, _ngZone) {
this._elementRef = _elementRef;
this._liveAnnouncer = _liveAnnouncer;
this._contentObserver = _contentObserver;
this._ngZone = _ngZone;
this._politeness = 'off';
}
/**
* The aria-live politeness level to use when announcing messages.
* @return {?}
*/
get politeness() { return this._politeness; }
/**
* @param {?} value
* @return {?}
*/
set politeness(value) {
this._politeness = value === 'polite' || value === 'assertive' ? value : 'off';
if (this._politeness === 'off') {
if (this._subscription) {
this._subscription.unsubscribe();
this._subscription = null;
}
}
else if (!this._subscription) {
this._subscription = this._ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
return this._contentObserver
.observe(this._elementRef)
.subscribe((/**
* @return {?}
*/
() => {
// Note that we use textContent here, rather than innerText, in order to avoid a reflow.
/** @type {?} */
const elementText = this._elementRef.nativeElement.textContent;
// The `MutationObserver` fires also for attribute
// changes which we don't want to announce.
if (elementText !== this._previousAnnouncedText) {
this._liveAnnouncer.announce(elementText, this._politeness);
this._previousAnnouncedText = elementText;
}
}));
}));
}
}
/**
* @return {?}
*/
ngOnDestroy() {
if (this._subscription) {
this._subscription.unsubscribe();
}
}
}
CdkAriaLive.decorators = [
{ type: Directive, args: [{
selector: '[cdkAriaLive]',
exportAs: 'cdkAriaLive',
},] },
];
/** @nocollapse */
CdkAriaLive.ctorParameters = () => [
{ type: ElementRef },
{ type: LiveAnnouncer },
{ type: ContentObserver },
{ type: NgZone }
];
CdkAriaLive.propDecorators = {
politeness: [{ type: Input, args: ['cdkAriaLive',] }]
};
/**
* \@docs-private \@deprecated \@breaking-change 8.0.0
* @param {?} parentAnnouncer
* @param {?} liveElement
* @param {?} _document
* @param {?} ngZone
* @return {?}
*/
function LIVE_ANNOUNCER_PROVIDER_FACTORY(parentAnnouncer, liveElement, _document, ngZone) {
return parentAnnouncer || new LiveAnnouncer(liveElement, ngZone, _document);
}
/**
* \@docs-private \@deprecated \@breaking-change 8.0.0
* @type {?}
*/
const LIVE_ANNOUNCER_PROVIDER = {
// If there is already a LiveAnnouncer available, use that. Otherwise, provide a new one.
provide: LiveAnnouncer,
deps: [
[new Optional(), new SkipSelf(), LiveAnnouncer],
[new Optional(), new Inject(LIVE_ANNOUNCER_ELEMENT_TOKEN)],
DOCUMENT,
NgZone,
],
useFactory: LIVE_ANNOUNCER_PROVIDER_FACTORY
};
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
// This is the value used by AngularJS Material. Through trial and error (on iPhone 6S) they found
// that a value of around 650ms seems appropriate.
/** @type {?} */
const TOUCH_BUFFER_MS = 650;
/**
* Event listener options that enable capturing and also
* mark the listener as passive if the browser supports it.
* @type {?}
*/
const captureEventListenerOptions = normalizePassiveListenerOptions({
passive: true,
capture: true
});
/**
* Monitors mouse and keyboard events to determine the cause of focus events.
*/
class FocusMonitor {
/**
* @param {?} _ngZone
* @param {?} _platform
*/
constructor(_ngZone, _platform) {
this._ngZone = _ngZone;
this._platform = _platform;
/**
* The focus origin that the next focus event is a result of.
*/
this._origin = null;
/**
* Whether the window has just been focused.
*/
this._windowFocused = false;
/**
* Map of elements being monitored to their info.
*/
this._elementInfo = new Map();
/**
* The number of elements currently being monitored.
*/
this._monitoredElementCount = 0;
/**
* Event listener for `keydown` events on the document.
* Needs to be an arrow function in order to preserve the context when it gets bound.
*/
this._documentKeydownListener = (/**
* @return {?}
*/
() => {
// On keydown record the origin and clear any touch event that may be in progress.
this._lastTouchTarget = null;
this._setOriginForCurrentEventQueue('keyboard');
});
/**
* Event listener for `mousedown` events on the document.
* Needs to be an arrow function in order to preserve the context when it gets bound.
*/
this._documentMousedownListener = (/**
* @return {?}
*/
() => {
// On mousedown record the origin only if there is not touch
// target, since a mousedown can happen as a result of a touch event.
if (!this._lastTouchTarget) {
this._setOriginForCurrentEventQueue('mouse');
}
});
/**
* Event listener for `touchstart` events on the document.
* Needs to be an arrow function in order to preserve the context when it gets bound.
*/
this._documentTouchstartListener = (/**
* @param {?} event
* @return {?}
*/
(event) => {
// When the touchstart event fires the focus event is not yet in the event queue. This means
// we can't rely on the trick used above (setting timeout of 1ms). Instead we wait 650ms to
// see if a focus happens.
if (this._touchTimeoutId != null) {
clearTimeout(this._touchTimeoutId);
}
this._lastTouchTarget = event.target;
this._touchTimeoutId = setTimeout((/**
* @return {?}
*/
() => this._lastTouchTarget = null), TOUCH_BUFFER_MS);
});
/**
* Event listener for `focus` events on the window.
* Needs to be an arrow function in order to preserve the context when it gets bound.
*/
this._windowFocusListener = (/**
* @return {?}
*/
() => {
// Make a note of when the window regains focus, so we can
// restore the origin info for the focused element.
this._windowFocused = true;
this._windowFocusTimeoutId = setTimeout((/**
* @return {?}
*/
() => this._windowFocused = false));
});
}
/**
* @param {?} element
* @param {?=} checkChildren
* @return {?}
*/
monitor(element, checkChildren = false) {
// Do nothing if we're not on the browser platform.
if (!this._platform.isBrowser) {
return of(null);
}
/** @type {?} */
const nativeElement = coerceElement(element);
// Check if we're already monitoring this element.
if (this._elementInfo.has(nativeElement)) {
/** @type {?} */
let cachedInfo = this._elementInfo.get(nativeElement);
(/** @type {?} */ (cachedInfo)).checkChildren = checkChildren;
return (/** @type {?} */ (cachedInfo)).subject.asObservable();
}
// Create monitored element info.
/** @type {?} */
let info = {
unlisten: (/**
* @return {?}
*/
() => { }),
checkChildren: checkChildren,
subject: new Subject()
};
this._elementInfo.set(nativeElement, info);
this._incrementMonitoredElementCount();
// Start listening. We need to listen in capture phase since focus events don't bubble.
/** @type {?} */
let focusListener = (/**
* @param {?} event
* @return {?}
*/
(event) => this._onFocus(event, nativeElement));
/** @type {?} */
let blurListener = (/**
* @param {?} event
* @return {?}
*/
(event) => this._onBlur(event, nativeElement));
this._ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
nativeElement.addEventListener('focus', focusListener, true);
nativeElement.addEventListener('blur', blurListener, true);
}));
// Create an unlisten function for later.
info.unlisten = (/**
* @return {?}
*/
() => {
nativeElement.removeEventListener('focus', focusListener, true);
nativeElement.removeEventListener('blur', blurListener, true);
});
return info.subject.asObservable();
}
/**
* @param {?} element
* @return {?}
*/
stopMonitoring(element) {
/** @type {?} */
const nativeElement = coerceElement(element);
/** @type {?} */
const elementInfo = this._elementInfo.get(nativeElement);
if (elementInfo) {
elementInfo.unlisten();
elementInfo.subject.complete();
this._setClasses(nativeElement);
this._elementInfo.delete(nativeElement);
this._decrementMonitoredElementCount();
}
}
/**
* @param {?} element
* @param {?} origin
* @param {?=} options
* @return {?}
*/
focusVia(element, origin, options) {
/** @type {?} */
const nativeElement = coerceElement(element);
this._setOriginForCurrentEventQueue(origin);
// `focus` isn't available on the server
if (typeof nativeElement.focus === 'function') {
// Cast the element to `any`, because the TS typings don't have the `options` parameter yet.
((/** @type {?} */ (nativeElement))).focus(options);
}
}
/**
* @return {?}
*/
ngOnDestroy() {
this._elementInfo.forEach((/**
* @param {?} _info
* @param {?} element
* @return {?}
*/
(_info, element) => this.stopMonitoring(element)));
}
/**
* @private
* @param {?} element
* @param {?} className
* @param {?} shouldSet
* @return {?}
*/
_toggleClass(element, className, shouldSet) {
if (shouldSet) {
element.classList.add(className);
}
else {
element.classList.remove(className);
}
}
/**
* Sets the focus classes on the element based on the given focus origin.
* @private
* @param {?} element The element to update the classes on.
* @param {?=} origin The focus origin.
* @return {?}
*/
_setClasses(element, origin) {
/** @type {?} */
const elementInfo = this._elementInfo.get(element);
if (elementInfo) {
this._toggleClass(element, 'cdk-focused', !!origin);
this._toggleClass(element, 'cdk-touch-focused', origin === 'touch');
this._toggleClass(element, 'cdk-keyboard-focused', origin === 'keyboard');
this._toggleClass(element, 'cdk-mouse-focused', origin === 'mouse');
this._toggleClass(element, 'cdk-program-focused', origin === 'program');
}
}
/**
* Sets the origin and schedules an async function to clear it at the end of the event queue.
* @private
* @param {?} origin The origin to set.
* @return {?}
*/
_setOriginForCurrentEventQueue(origin) {
this._ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
this._origin = origin;
// Sometimes the focus origin won't be valid in Firefox because Firefox seems to focus *one*
// tick after the interaction event fired. To ensure the focus origin is always correct,
// the focus origin will be determined at the beginning of the next tick.
this._originTimeoutId = setTimeout((/**
* @return {?}
*/
() => this._origin = null), 1);
}));
}
/**
* Checks whether the given focus event was caused by a touchstart event.
* @private
* @param {?} event The focus event to check.
* @return {?} Whether the event was caused by a touch.
*/
_wasCausedByTouch(event) {
// Note(mmalerba): This implementation is not quite perfect, there is a small edge case.
// Consider the following dom structure:
//
// <div #parent tabindex="0" cdkFocusClasses>
// <div #child (click)="#parent.focus()"></div>
// </div>
//
// If the user touches the #child element and the #parent is programmatically focused as a
// result, this code will still consider it to have been caused by the touch event and will
// apply the cdk-touch-focused class rather than the cdk-program-focused class. This is a
// relatively small edge-case that can be worked around by using
// focusVia(parentEl, 'program') to focus the parent element.
//
// If we decide that we absolutely must handle this case correctly, we can do so by listening
// for the first focus event after the touchstart, and then the first blur event after that
// focus event. When that blur event fires we know that whatever follows is not a result of the
// touchstart.
/** @type {?} */
let focusTarget = event.target;
return this._lastTouchTarget instanceof Node && focusTarget instanceof Node &&
(focusTarget === this._lastTouchTarget || focusTarget.contains(this._lastTouchTarget));
}
/**
* Handles focus events on a registered element.
* @private
* @param {?} event The focus event.
* @param {?} element The monitored element.
* @return {?}
*/
_onFocus(event, element) {
// NOTE(mmalerba): We currently set the classes based on the focus origin of the most recent
// focus event affecting the monitored element. If we want to use the origin of the first event
// instead we should check for the cdk-focused class here and return if the element already has
// it. (This only matters for elements that have includesChildren = true).
// NOTE(mmalerba): We currently set the classes based on the focus origin of the most recent
// focus event affecting the monitored element. If we want to use the origin of the first event
// instead we should check for the cdk-focused class here and return if the element already has
// it. (This only matters for elements that have includesChildren = true).
// If we are not counting child-element-focus as focused, make sure that the event target is the
// monitored element itself.
/** @type {?} */
const elementInfo = this._elementInfo.get(element);
if (!elementInfo || (!elementInfo.checkChildren && element !== event.target)) {
return;
}
// If we couldn't detect a cause for the focus event, it's due to one of three reasons:
// 1) The window has just regained focus, in which case we want to restore the focused state of
// the element from before the window blurred.
// 2) It was caused by a touch event, in which case we mark the origin as 'touch'.
// 3) The element was programmatically focused, in which case we should mark the origin as
// 'program'.
/** @type {?} */
let origin = this._origin;
if (!origin) {
if (this._windowFocused && this._lastFocusOrigin) {
origin = this._lastFocusOrigin;
}
else if (this._wasCausedByTouch(event)) {
origin = 'touch';
}
else {
origin = 'program';
}
}
this._setClasses(element, origin);
this._emitOrigin(elementInfo.subject, origin);
this._lastFocusOrigin = origin;
}
/**
* Handles blur events on a registered element.
* @param {?} event The blur event.
* @param {?} element The monitored element.
* @return {?}
*/
_onBlur(event, element) {
// If we are counting child-element-focus as focused, make sure that we aren't just blurring in
// order to focus another child of the monitored element.
/** @type {?} */
const elementInfo = this._elementInfo.get(element);
if (!elementInfo || (elementInfo.checkChildren && event.relatedTarget instanceof Node &&
element.contains(event.relatedTarget))) {
return;
}
this._setClasses(element);
this._emitOrigin(elementInfo.subject, null);
}
/**
* @private
* @param {?} subject
* @param {?} origin
* @return {?}
*/
_emitOrigin(subject, origin) {
this._ngZone.run((/**
* @return {?}
*/
() => subject.next(origin)));
}
/**
* @private
* @return {?}
*/
_incrementMonitoredElementCount() {
// Register global listeners when first element is monitored.
if (++this._monitoredElementCount == 1 && this._platform.isBrowser) {
// Note: we listen to events in the capture phase so we
// can detect them even if the user stops propagation.
this._ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
document.addEventListener('keydown', this._documentKeydownListener, captureEventListenerOptions);
document.addEventListener('mousedown', this._documentMousedownListener, captureEventListenerOptions);
document.addEventListener('touchstart', this._documentTouchstartListener, captureEventListenerOptions);
window.addEventListener('focus', this._windowFocusListener);
}));
}
}
/**
* @private
* @return {?}
*/
_decrementMonitoredElementCount() {
// Unregister global listeners when last element is unmonitored.
if (!--this._monitoredElementCount) {
document.removeEventListener('keydown', this._documentKeydownListener, captureEventListenerOptions);
document.removeEventListener('mousedown', this._documentMousedownListener, captureEventListenerOptions);
document.removeEventListener('touchstart', this._documentTouchstartListener, captureEventListenerOptions);
window.removeEventListener('focus', this._windowFocusListener);
// Clear timeouts for all potentially pending timeouts to prevent the leaks.
clearTimeout(this._windowFocusTimeoutId);
clearTimeout(this._touchTimeoutId);
clearTimeout(this._originTimeoutId);
}
}
}
FocusMonitor.decorators = [
{ type: Injectable, args: [{ providedIn: 'root' },] },
];
/** @nocollapse */
FocusMonitor.ctorParameters = () => [
{ type: NgZone },
{ type: Platform }
];
/** @nocollapse */ FocusMonitor.ngInjectableDef = ɵɵdefineInjectable({ factory: function FocusMonitor_Factory() { return new FocusMonitor(ɵɵinject(NgZone), ɵɵinject(Platform)); }, token: FocusMonitor, providedIn: "root" });
/**
* Directive that determines how a particular element was focused (via keyboard, mouse, touch, or
* programmatically) and adds corresponding classes to the element.
*
* There are two variants of this directive:
* 1) cdkMonitorElementFocus: does not consider an element to be focused if one of its children is
* focused.
* 2) cdkMonitorSubtreeFocus: considers an element focused if it or any of its children are focused.
*/
class CdkMonitorFocus {
/**
* @param {?} _elementRef
* @param {?} _focusMonitor
*/
constructor(_elementRef, _focusMonitor) {
this._elementRef = _elementRef;
this._focusMonitor = _focusMonitor;
this.cdkFocusChange = new EventEmitter();
this._monitorSubscription = this._focusMonitor.monitor(this._elementRef, this._elementRef.nativeElement.hasAttribute('cdkMonitorSubtreeFocus'))
.subscribe((/**
* @param {?} origin
* @return {?}
*/
origin => this.cdkFocusChange.emit(origin)));
}
/**
* @return {?}
*/
ngOnDestroy() {
this._focusMonitor.stopMonitoring(this._elementRef);
this._monitorSubscription.unsubscribe();
}
}
CdkMonitorFocus.decorators = [
{ type: Directive, args: [{
selector: '[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]',
},] },
];
/** @nocollapse */
CdkMonitorFocus.ctorParameters = () => [
{ type: ElementRef },
{ type: FocusMonitor }
];
CdkMonitorFocus.propDecorators = {
cdkFocusChange: [{ type: Output }]
};
/**
* \@docs-private \@deprecated \@breaking-change 8.0.0
* @param {?} parentDispatcher
* @param {?} ngZone
* @param {?} platform
* @return {?}
*/
function FOCUS_MONITOR_PROVIDER_FACTORY(parentDispatcher, ngZone, platform) {
return parentDispatcher || new FocusMonitor(ngZone, platform);
}
/**
* \@docs-private \@deprecated \@breaking-change 8.0.0
* @type {?}
*/
const FOCUS_MONITOR_PROVIDER = {
// If there is already a FocusMonitor available, use that. Otherwise, provide a new one.
provide: FocusMonitor,
deps: [[new Optional(), new SkipSelf(), FocusMonitor], NgZone, Platform],
useFactory: FOCUS_MONITOR_PROVIDER_FACTORY
};
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* Screenreaders will often fire fake mousedown events when a focusable element
* is activated using the keyboard. We can typically distinguish between these faked
* mousedown events and real mousedown events using the "buttons" property. While
* real mousedowns will indicate the mouse button that was pressed (e.g. "1" for
* the left mouse button), faked mousedowns will usually set the property value to 0.
* @param {?} event
* @return {?}
*/
function isFakeMousedownFromScreenReader(event) {
return event.buttons === 0;
}
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
class A11yModule {
}
A11yModule.decorators = [
{ type: NgModule, args: [{
imports: [CommonModule, PlatformModule, ObserversModule],
declarations: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],
exports: [CdkAriaLive, CdkTrapFocus, CdkMonitorFocus],
},] },
];
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
export { ARIA_DESCRIBER_PROVIDER_FACTORY, MESSAGES_CONTAINER_ID, CDK_DESCRIBEDBY_ID_PREFIX, CDK_DESCRIBEDBY_HOST_ATTRIBUTE, AriaDescriber, ARIA_DESCRIBER_PROVIDER, ActiveDescendantKeyManager, FocusKeyManager, ListKeyManager, FocusTrap, FocusTrapFactory, CdkTrapFocus, InteractivityChecker, LIVE_ANNOUNCER_PROVIDER_FACTORY, LiveAnnouncer, CdkAriaLive, LIVE_ANNOUNCER_PROVIDER, LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY, LIVE_ANNOUNCER_ELEMENT_TOKEN, LIVE_ANNOUNCER_DEFAULT_OPTIONS, FOCUS_MONITOR_PROVIDER_FACTORY, TOUCH_BUFFER_MS, FocusMonitor, CdkMonitorFocus, FOCUS_MONITOR_PROVIDER, isFakeMousedownFromScreenReader, A11yModule };
//# sourceMappingURL=a11y.js.map