http://git-wip-us.apache.org/repos/asf/nifi-fds/blob/90759b86/node_modules/@angular/cdk/bundles/cdk-a11y.umd.js
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+/**
+ * @license
+ * Copyright Google Inc. 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
+ */
+(function (global, factory) {
+ typeof exports === 'object' && typeof module !== 'undefined' ?
factory(exports, require('rxjs/Subject'), require('rxjs/Subscription'),
require('@angular/cdk/keycodes'), require('@angular/cdk/rxjs'),
require('@angular/core'), require('@angular/cdk/platform'),
require('@angular/cdk/coercion'), require('rxjs/observable/of'),
require('@angular/common')) :
+ typeof define === 'function' && define.amd ? define(['exports',
'rxjs/Subject', 'rxjs/Subscription', '@angular/cdk/keycodes',
'@angular/cdk/rxjs', '@angular/core', '@angular/cdk/platform',
'@angular/cdk/coercion', 'rxjs/observable/of', '@angular/common'], factory) :
+ (factory((global.ng = global.ng || {}, global.ng.cdk = global.ng.cdk ||
{}, global.ng.cdk.a11y = global.ng.cdk.a11y ||
{}),global.Rx,global.Rx,global.ng.cdk.keycodes,global.ng.cdk.rxjs,global.ng.core,global.ng.cdk.platform,global.ng.cdk.coercion,global.Rx.Observable,global.ng.common));
+}(this, (function
(exports,rxjs_Subject,rxjs_Subscription,_angular_cdk_keycodes,_angular_cdk_rxjs,_angular_core,_angular_cdk_platform,_angular_cdk_coercion,rxjs_observable_of,_angular_common)
{ 'use strict';
+
+/*!
*****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+*****************************************************************************
*/
+/* global Reflect, Promise */
+
+var extendStatics = Object.setPrototypeOf ||
+ ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b;
}) ||
+ function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends(d, b) {
+ extendStatics(d, b);
+ function __() { this.constructor = d; }
+ d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype,
new __());
+}
+
+/**
+ * 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.
+ */
+var ListKeyManager = (function () {
+ /**
+ * @param {?} _items
+ */
+ function ListKeyManager(_items) {
+ this._items = _items;
+ this._activeItemIndex = -1;
+ this._wrap = false;
+ this._letterKeyStream = new rxjs_Subject.Subject();
+ this._typeaheadSubscription = rxjs_Subscription.Subscription.EMPTY;
+ 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 rxjs_Subject.Subject();
+ }
+ /**
+ * Turns on wrapping mode, which ensures that the active item will wrap to
+ * the other end of list when there are no more items in the given
direction.
+ * @return {?}
+ */
+ ListKeyManager.prototype.withWrap = function () {
+ this._wrap = true;
+ return this;
+ };
+ /**
+ * Turns on typeahead mode which allows users to set the active item by
typing.
+ * @param {?=} debounceInterval Time to wait after the last keystroke
before setting the active item.
+ * @return {?}
+ */
+ ListKeyManager.prototype.withTypeAhead = function (debounceInterval) {
+ var _this = this;
+ if (debounceInterval === void 0) { debounceInterval = 200; }
+ if (this._items.length && this._items.some(function (item) { return
typeof item.getLabel !== 'function'; })) {
+ throw Error('ListKeyManager items in typeahead mode must implement
the `getLabel` method.');
+ }
+ 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.
+ this._typeaheadSubscription =
_angular_cdk_rxjs.RxChain.from(this._letterKeyStream)
+ .call(_angular_cdk_rxjs.doOperator, function (keyCode) { return
_this._pressedLetters.push(keyCode); })
+ .call(_angular_cdk_rxjs.debounceTime, debounceInterval)
+ .call(_angular_cdk_rxjs.filter, function () { return
_this._pressedLetters.length > 0; })
+ .call(_angular_cdk_rxjs.map, function () { return
_this._pressedLetters.join(''); })
+ .subscribe(function (inputString) {
+ var /** @type {?} */ items = _this._items.toArray();
+ // Start at 1 because we want to start searching at the item
immediately
+ // following the current active item.
+ for (var /** @type {?} */ i = 1; i < items.length + 1; i++) {
+ var /** @type {?} */ index = (_this._activeItemIndex + i) %
items.length;
+ var /** @type {?} */ item = items[index];
+ if (!item.disabled &&
((item.getLabel))().toUpperCase().trim().indexOf(inputString) === 0) {
+ _this.setActiveItem(index);
+ break;
+ }
+ }
+ _this._pressedLetters = [];
+ });
+ return this;
+ };
+ /**
+ * Sets the active item to the item at the index specified.
+ * @param {?} index The index of the item to be set as active.
+ * @return {?}
+ */
+ ListKeyManager.prototype.setActiveItem = function (index) {
+ this._activeItemIndex = index;
+ this._activeItem = this._items.toArray()[index];
+ };
+ /**
+ * 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 {?}
+ */
+ ListKeyManager.prototype.onKeydown = function (event) {
+ switch (event.keyCode) {
+ case _angular_cdk_keycodes.DOWN_ARROW:
+ this.setNextItemActive();
+ break;
+ case _angular_cdk_keycodes.UP_ARROW:
+ this.setPreviousItemActive();
+ break;
+ case _angular_cdk_keycodes.TAB:
+ this.tabOut.next();
+ return;
+ default:
+ var /** @type {?} */ keyCode = event.keyCode;
+ // 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 >= _angular_cdk_keycodes.A && keyCode <=
_angular_cdk_keycodes.Z) || (keyCode >= _angular_cdk_keycodes.ZERO && keyCode
<= _angular_cdk_keycodes.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();
+ };
+ Object.defineProperty(ListKeyManager.prototype, "activeItemIndex", {
+ /**
+ * Index of the currently active item.
+ * @return {?}
+ */
+ get: function () {
+ return this._activeItemIndex;
+ },
+ enumerable: true,
+ configurable: true
+ });
+ Object.defineProperty(ListKeyManager.prototype, "activeItem", {
+ /**
+ * The active item.
+ * @return {?}
+ */
+ get: function () {
+ return this._activeItem;
+ },
+ enumerable: true,
+ configurable: true
+ });
+ /**
+ * Sets the active item to the first enabled item in the list.
+ * @return {?}
+ */
+ ListKeyManager.prototype.setFirstItemActive = function () {
+ this._setActiveItemByIndex(0, 1);
+ };
+ /**
+ * Sets the active item to the last enabled item in the list.
+ * @return {?}
+ */
+ ListKeyManager.prototype.setLastItemActive = function () {
+ this._setActiveItemByIndex(this._items.length - 1, -1);
+ };
+ /**
+ * Sets the active item to the next enabled item in the list.
+ * @return {?}
+ */
+ ListKeyManager.prototype.setNextItemActive = function () {
+ this._activeItemIndex < 0 ? this.setFirstItemActive() :
this._setActiveItemByDelta(1);
+ };
+ /**
+ * Sets the active item to a previous enabled item in the list.
+ * @return {?}
+ */
+ ListKeyManager.prototype.setPreviousItemActive = function () {
+ this._activeItemIndex < 0 && this._wrap ? this.setLastItemActive()
+ : this._setActiveItemByDelta(-1);
+ };
+ /**
+ * Allows setting of the activeItemIndex without any other effects.
+ * @param {?} index The new activeItemIndex.
+ * @return {?}
+ */
+ ListKeyManager.prototype.updateActiveItemIndex = function (index) {
+ this._activeItemIndex = 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.
+ * @param {?} delta
+ * @param {?=} items
+ * @return {?}
+ */
+ ListKeyManager.prototype._setActiveItemByDelta = function (delta, items) {
+ if (items === void 0) { items = this._items.toArray(); }
+ this._wrap ? this._setActiveInWrapMode(delta, items)
+ : this._setActiveInDefaultMode(delta, items);
+ };
+ /**
+ * 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.
+ * @param {?} delta
+ * @param {?} items
+ * @return {?}
+ */
+ ListKeyManager.prototype._setActiveInWrapMode = function (delta, items) {
+ // when active item would leave menu, wrap to beginning or end
+ this._activeItemIndex =
+ (this._activeItemIndex + delta + items.length) % items.length;
+ // skip all disabled menu items recursively until an enabled one is
reached
+ if (items[this._activeItemIndex].disabled) {
+ this._setActiveInWrapMode(delta, items);
+ }
+ else {
+ this.setActiveItem(this._activeItemIndex);
+ }
+ };
+ /**
+ * 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.
+ * @param {?} delta
+ * @param {?} items
+ * @return {?}
+ */
+ ListKeyManager.prototype._setActiveInDefaultMode = function (delta, items)
{
+ this._setActiveItemByIndex(this._activeItemIndex + delta, delta,
items);
+ };
+ /**
+ * 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.
+ * @param {?} index
+ * @param {?} fallbackDelta
+ * @param {?=} items
+ * @return {?}
+ */
+ ListKeyManager.prototype._setActiveItemByIndex = function (index,
fallbackDelta, items) {
+ if (items === void 0) { items = this._items.toArray(); }
+ if (!items[index]) {
+ return;
+ }
+ while (items[index].disabled) {
+ index += fallbackDelta;
+ if (!items[index]) {
+ return;
+ }
+ }
+ this.setActiveItem(index);
+ };
+ return ListKeyManager;
+}());
+
+var ActiveDescendantKeyManager = (function (_super) {
+ __extends(ActiveDescendantKeyManager, _super);
+ function ActiveDescendantKeyManager() {
+ return _super !== null && _super.apply(this, arguments) || this;
+ }
+ /**
+ * This method sets the active item to the item at the specified index.
+ * It also adds active styles to the newly active item and removes active
+ * styles from the previously active item.
+ * @param {?} index
+ * @return {?}
+ */
+ ActiveDescendantKeyManager.prototype.setActiveItem = function (index) {
+ if (this.activeItem) {
+ this.activeItem.setInactiveStyles();
+ }
+ _super.prototype.setActiveItem.call(this, index);
+ if (this.activeItem) {
+ this.activeItem.setActiveStyles();
+ }
+ };
+ return ActiveDescendantKeyManager;
+}(ListKeyManager));
+
+/**
+ * IDs are deliminated by an empty space, as per the spec.
+ */
+var 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) {
+ var /** @type {?} */ ids = getAriaReferenceIds(el, attr);
+ if (ids.some(function (existingId) { return 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) {
+ var /** @type {?} */ ids = getAriaReferenceIds(el, attr);
+ var /** @type {?} */ filteredIds = ids.filter(function (val) { return 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) || [];
+}
+
+/**
+ * ID used for the body container where all messages are appended.
+ */
+var MESSAGES_CONTAINER_ID = 'cdk-describedby-message-container';
+/**
+ * ID prefix used for each created message element.
+ */
+var CDK_DESCRIBEDBY_ID_PREFIX = 'cdk-describedby-message';
+/**
+ * Attribute given to each host element that is described by a message element.
+ */
+var CDK_DESCRIBEDBY_HOST_ATTRIBUTE = 'cdk-describedby-host';
+/**
+ * Global incremental identifier for each registered message element.
+ */
+var nextId = 0;
+/**
+ * Global map of all registered message elements that have been placed into
the document.
+ */
+var messageRegistry = new Map();
+/**
+ * Container for all registered messages.
+ */
+var 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.
+ * \@docs-private
+ */
+var AriaDescriber = (function () {
+ /**
+ * @param {?} _platform
+ */
+ function AriaDescriber(_platform) {
+ this._platform = _platform;
+ }
+ /**
+ * 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 {?}
+ */
+ AriaDescriber.prototype.describe = function (hostElement, message) {
+ if (!this._platform.isBrowser || !message.trim()) {
+ return;
+ }
+ if (!messageRegistry.has(message)) {
+ createMessageElement(message);
+ }
+ if (!isElementDescribedByMessage(hostElement, message)) {
+ addMessageReference(hostElement, message);
+ }
+ };
+ /**
+ * Removes the host element's aria-describedby reference to the message
element.
+ * @param {?} hostElement
+ * @param {?} message
+ * @return {?}
+ */
+ AriaDescriber.prototype.removeDescription = function (hostElement,
message) {
+ if (!this._platform.isBrowser || !message.trim()) {
+ return;
+ }
+ if (isElementDescribedByMessage(hostElement, message)) {
+ removeMessageReference(hostElement, message);
+ }
+ var /** @type {?} */ registeredMessage = messageRegistry.get(message);
+ if (registeredMessage && registeredMessage.referenceCount === 0) {
+ deleteMessageElement(message);
+ }
+ if (messagesContainer && messagesContainer.childNodes.length === 0) {
+ deleteMessagesContainer();
+ }
+ };
+ /**
+ * Unregisters all created message elements and removes the message
container.
+ * @return {?}
+ */
+ AriaDescriber.prototype.ngOnDestroy = function () {
+ if (!this._platform.isBrowser) {
+ return;
+ }
+ var /** @type {?} */ describedElements = document.querySelectorAll("["
+ CDK_DESCRIBEDBY_HOST_ATTRIBUTE + "]");
+ for (var /** @type {?} */ i = 0; i < describedElements.length; i++) {
+ removeCdkDescribedByReferenceIds(describedElements[i]);
+
describedElements[i].removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);
+ }
+ if (messagesContainer) {
+ deleteMessagesContainer();
+ }
+ messageRegistry.clear();
+ };
+ AriaDescriber.decorators = [
+ { type: _angular_core.Injectable },
+ ];
+ /**
+ * @nocollapse
+ */
+ AriaDescriber.ctorParameters = function () { return [
+ { type: _angular_cdk_platform.Platform, },
+ ]; };
+ return AriaDescriber;
+}());
+/**
+ * Creates a new element in the visually hidden message container element with
the message
+ * as its content and adds it to the message registry.
+ * @param {?} message
+ * @return {?}
+ */
+function createMessageElement(message) {
+ var /** @type {?} */ messageElement = document.createElement('div');
+ messageElement.setAttribute('id', CDK_DESCRIBEDBY_ID_PREFIX + "-" +
nextId++);
+ messageElement.appendChild(/** @type {?} */
((document.createTextNode(message))));
+ if (!messagesContainer) {
+ createMessagesContainer();
+ } /** @type {?} */
+ ((messagesContainer)).appendChild(messageElement);
+ messageRegistry.set(message, { messageElement: messageElement,
referenceCount: 0 });
+}
+/**
+ * Deletes the message element from the global messages container.
+ * @param {?} message
+ * @return {?}
+ */
+function deleteMessageElement(message) {
+ var /** @type {?} */ registeredMessage = messageRegistry.get(message);
+ var /** @type {?} */ messageElement = registeredMessage &&
registeredMessage.messageElement;
+ if (messagesContainer && messageElement) {
+ messagesContainer.removeChild(messageElement);
+ }
+ messageRegistry.delete(message);
+}
+/**
+ * Creates the global container for all aria-describedby messages.
+ * @return {?}
+ */
+function createMessagesContainer() {
+ messagesContainer = document.createElement('div');
+ messagesContainer.setAttribute('id', MESSAGES_CONTAINER_ID);
+ messagesContainer.setAttribute('aria-hidden', 'true');
+ messagesContainer.style.display = 'none';
+ document.body.appendChild(messagesContainer);
+}
+/**
+ * Deletes the global messages container.
+ * @return {?}
+ */
+function deleteMessagesContainer() {
+ document.body.removeChild(/** @type {?} */ ((messagesContainer)));
+ messagesContainer = null;
+}
+/**
+ * Removes all cdk-describedby messages that are hosted through the element.
+ * @param {?} element
+ * @return {?}
+ */
+function removeCdkDescribedByReferenceIds(element) {
+ // Remove all aria-describedby reference IDs that are prefixed by
CDK_DESCRIBEDBY_ID_PREFIX
+ var /** @type {?} */ originalReferenceIds = getAriaReferenceIds(element,
'aria-describedby')
+ .filter(function (id) { return 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.
+ * @param {?} element
+ * @param {?} message
+ * @return {?}
+ */
+function addMessageReference(element, message) {
+ var /** @type {?} */ registeredMessage = ((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.
+ * @param {?} element
+ * @param {?} message
+ * @return {?}
+ */
+function removeMessageReference(element, message) {
+ var /** @type {?} */ registeredMessage = ((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.
+ * @param {?} element
+ * @param {?} message
+ * @return {?}
+ */
+function isElementDescribedByMessage(element, message) {
+ var /** @type {?} */ referenceIds = getAriaReferenceIds(element,
'aria-describedby');
+ var /** @type {?} */ registeredMessage = messageRegistry.get(message);
+ var /** @type {?} */ messageId = registeredMessage &&
registeredMessage.messageElement.id;
+ return !!messageId && referenceIds.indexOf(messageId) != -1;
+}
+/**
+ * \@docs-private
+ * @param {?} parentDispatcher
+ * @param {?} platform
+ * @return {?}
+ */
+function ARIA_DESCRIBER_PROVIDER_FACTORY(parentDispatcher, platform) {
+ return parentDispatcher || new AriaDescriber(platform);
+}
+/**
+ * \@docs-private
+ */
+var ARIA_DESCRIBER_PROVIDER = {
+ // If there is already an AriaDescriber available, use that. Otherwise,
provide a new one.
+ provide: AriaDescriber,
+ deps: [
+ [new _angular_core.Optional(), new _angular_core.SkipSelf(),
AriaDescriber],
+ _angular_cdk_platform.Platform
+ ],
+ useFactory: ARIA_DESCRIBER_PROVIDER_FACTORY
+};
+
+/**
+ * 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;
+}
+
+var FocusKeyManager = (function (_super) {
+ __extends(FocusKeyManager, _super);
+ function FocusKeyManager() {
+ return _super !== null && _super.apply(this, arguments) || this;
+ }
+ /**
+ * This method sets the active item to the item at the specified index.
+ * It also adds focuses the newly active item.
+ * @param {?} index
+ * @return {?}
+ */
+ FocusKeyManager.prototype.setActiveItem = function (index) {
+ _super.prototype.setActiveItem.call(this, index);
+ if (this.activeItem) {
+ this.activeItem.focus();
+ }
+ };
+ return FocusKeyManager;
+}(ListKeyManager));
+
+/**
+ * Utility for checking the interactivity of an element, such as whether is is
focusable or
+ * tabbable.
+ */
+var InteractivityChecker = (function () {
+ /**
+ * @param {?} _platform
+ */
+ function InteractivityChecker(_platform) {
+ this._platform = _platform;
+ }
+ /**
+ * Gets whether an element is disabled.
+ *
+ * @param {?} element Element to be checked.
+ * @return {?} Whether the element is disabled.
+ */
+ InteractivityChecker.prototype.isDisabled = function (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.
+ */
+ InteractivityChecker.prototype.isVisible = function (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.
+ */
+ InteractivityChecker.prototype.isTabbable = function (element) {
+ // Nothing is tabbable on the the server ð
+ if (!this._platform.isBrowser) {
+ return false;
+ }
+ var /** @type {?} */ frameElement = (getWindow(element).frameElement);
+ if (frameElement) {
+ var /** @type {?} */ 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;
+ }
+ }
+ var /** @type {?} */ nodeName = element.nodeName.toLowerCase();
+ var /** @type {?} */ 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.
+ */
+ InteractivityChecker.prototype.isFocusable = function (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: _angular_core.Injectable },
+ ];
+ /**
+ * @nocollapse
+ */
+ InteractivityChecker.ctorParameters = function () { return [
+ { type: _angular_cdk_platform.Platform, },
+ ]; };
+ return InteractivityChecker;
+}());
+/**
+ * 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 ||
element.getClientRects().length);
+}
+/**
+ * Gets whether an element's
+ * @param {?} element
+ * @return {?}
+ */
+function isNativeFormElement(element) {
+ var /** @type {?} */ 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;
+ }
+ var /** @type {?} */ 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
+ var /** @type {?} */ 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) {
+ var /** @type {?} */ nodeName = element.nodeName.toLowerCase();
+ var /** @type {?} */ inputType = nodeName === 'input' && ((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) {
+ return node.ownerDocument.defaultView || window;
+}
+
+/**
+ * Class that allows for trapping focus within a DOM element.
+ *
+ * NOTE: This class currently uses a very simple (naive) 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.
+ * This will be replaced with a more intelligent solution before the library
is considered stable.
+ */
+var FocusTrap = (function () {
+ /**
+ * @param {?} _element
+ * @param {?} _platform
+ * @param {?} _checker
+ * @param {?} _ngZone
+ * @param {?=} deferAnchors
+ */
+ function FocusTrap(_element, _platform, _checker, _ngZone, deferAnchors) {
+ if (deferAnchors === void 0) { deferAnchors = false; }
+ this._element = _element;
+ this._platform = _platform;
+ this._checker = _checker;
+ this._ngZone = _ngZone;
+ this._enabled = true;
+ if (!deferAnchors) {
+ this.attachAnchors();
+ }
+ }
+ Object.defineProperty(FocusTrap.prototype, "enabled", {
+ /**
+ * Whether the focus trap is active.
+ * @return {?}
+ */
+ get: function () { return this._enabled; },
+ /**
+ * @param {?} val
+ * @return {?}
+ */
+ set: function (val) {
+ this._enabled = val;
+ if (this._startAnchor && this._endAnchor) {
+ this._startAnchor.tabIndex = this._endAnchor.tabIndex =
this._enabled ? 0 : -1;
+ }
+ },
+ enumerable: true,
+ configurable: true
+ });
+ /**
+ * Destroys the focus trap by cleaning up the anchors.
+ * @return {?}
+ */
+ FocusTrap.prototype.destroy = function () {
+ if (this._startAnchor && this._startAnchor.parentNode) {
+ this._startAnchor.parentNode.removeChild(this._startAnchor);
+ }
+ if (this._endAnchor && this._endAnchor.parentNode) {
+ this._endAnchor.parentNode.removeChild(this._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 {?}
+ */
+ FocusTrap.prototype.attachAnchors = function () {
+ var _this = this;
+ // If we're not on the browser, there can be no focus to trap.
+ if (!this._platform.isBrowser) {
+ return;
+ }
+ if (!this._startAnchor) {
+ this._startAnchor = this._createAnchor();
+ }
+ if (!this._endAnchor) {
+ this._endAnchor = this._createAnchor();
+ }
+ this._ngZone.runOutsideAngular(function () {
+ ((_this._startAnchor)).addEventListener('focus', function () {
+ _this.focusLastTabbableElement();
+ }); /** @type {?} */
+ ((_this._endAnchor)).addEventListener('focus', function () {
+ _this.focusFirstTabbableElement();
+ });
+ if (_this._element.parentNode) {
+ _this._element.parentNode.insertBefore(/** @type {?} */
((_this._startAnchor)), _this._element);
+ _this._element.parentNode.insertBefore(/** @type {?} */
((_this._endAnchor)), _this._element.nextSibling);
+ }
+ });
+ };
+ /**
+ * 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.
+ */
+ FocusTrap.prototype.focusInitialElementWhenReady = function () {
+ var _this = this;
+ return new Promise(function (resolve) {
+ _this._executeOnStable(function () { 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.
+ */
+ FocusTrap.prototype.focusFirstTabbableElementWhenReady = function () {
+ var _this = this;
+ return new Promise(function (resolve) {
+ _this._executeOnStable(function () { 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.
+ */
+ FocusTrap.prototype.focusLastTabbableElementWhenReady = function () {
+ var _this = this;
+ return new Promise(function (resolve) {
+ _this._executeOnStable(function () { return
resolve(_this.focusLastTabbableElement()); });
+ });
+ };
+ /**
+ * Get the specified boundary element of the trapped region.
+ * @param {?} bound The boundary to get (start or end of trapped region).
+ * @return {?} The boundary element.
+ */
+ FocusTrap.prototype._getRegionBoundary = function (bound) {
+ // Contains the deprecated version of selector, for temporary
backwards comparability.
+ var /** @type {?} */ markers =
(this._element.querySelectorAll("[cdk-focus-region-" + bound + "], " +
+ ("[cdk-focus-" + bound + "]")));
+ for (var /** @type {?} */ i = 0; i < markers.length; i++) {
+ if (markers[i].hasAttribute("cdk-focus-" + bound)) {
+ console.warn("Found use of deprecated attribute 'cdk-focus-" +
bound + "'," +
+ (" use 'cdk-focus-region-" + bound + "' instead."),
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 {?} Returns whether focus was moved successfuly.
+ */
+ FocusTrap.prototype.focusInitialElement = function () {
+ var /** @type {?} */ redirectToElement =
(this._element.querySelector('[cdk-focus-initial]'));
+ if (redirectToElement) {
+ redirectToElement.focus();
+ return true;
+ }
+ return this.focusFirstTabbableElement();
+ };
+ /**
+ * Focuses the first tabbable element within the focus trap region.
+ * @return {?} Returns whether focus was moved successfuly.
+ */
+ FocusTrap.prototype.focusFirstTabbableElement = function () {
+ var /** @type {?} */ redirectToElement =
this._getRegionBoundary('start');
+ if (redirectToElement) {
+ redirectToElement.focus();
+ }
+ return !!redirectToElement;
+ };
+ /**
+ * Focuses the last tabbable element within the focus trap region.
+ * @return {?} Returns whether focus was moved successfuly.
+ */
+ FocusTrap.prototype.focusLastTabbableElement = function () {
+ var /** @type {?} */ redirectToElement =
this._getRegionBoundary('end');
+ if (redirectToElement) {
+ redirectToElement.focus();
+ }
+ return !!redirectToElement;
+ };
+ /**
+ * Get the first tabbable element from a DOM subtree (inclusive).
+ * @param {?} root
+ * @return {?}
+ */
+ FocusTrap.prototype._getFirstTabbableElement = function (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.
+ var /** @type {?} */ children = root.children || root.childNodes;
+ for (var /** @type {?} */ i = 0; i < children.length; i++) {
+ var /** @type {?} */ tabbableChild = children[i].nodeType ===
Node.ELEMENT_NODE ?
+ this._getFirstTabbableElement(/** @type {?} */ (children[i])) :
+ null;
+ if (tabbableChild) {
+ return tabbableChild;
+ }
+ }
+ return null;
+ };
+ /**
+ * Get the last tabbable element from a DOM subtree (inclusive).
+ * @param {?} root
+ * @return {?}
+ */
+ FocusTrap.prototype._getLastTabbableElement = function (root) {
+ if (this._checker.isFocusable(root) && this._checker.isTabbable(root))
{
+ return root;
+ }
+ // Iterate in reverse DOM order.
+ var /** @type {?} */ children = root.children || root.childNodes;
+ for (var /** @type {?} */ i = children.length - 1; i >= 0; i--) {
+ var /** @type {?} */ tabbableChild = children[i].nodeType ===
Node.ELEMENT_NODE ?
+ this._getLastTabbableElement(/** @type {?} */ (children[i])) :
+ null;
+ if (tabbableChild) {
+ return tabbableChild;
+ }
+ }
+ return null;
+ };
+ /**
+ * Creates an anchor element.
+ * @return {?}
+ */
+ FocusTrap.prototype._createAnchor = function () {
+ var /** @type {?} */ anchor = document.createElement('div');
+ anchor.tabIndex = this._enabled ? 0 : -1;
+ anchor.classList.add('cdk-visually-hidden');
+ anchor.classList.add('cdk-focus-trap-anchor');
+ return anchor;
+ };
+ /**
+ * Executes a function when the zone is stable.
+ * @param {?} fn
+ * @return {?}
+ */
+ FocusTrap.prototype._executeOnStable = function (fn) {
+ if (this._ngZone.isStable) {
+ fn();
+ }
+ else {
+
_angular_cdk_rxjs.first.call(this._ngZone.onStable.asObservable()).subscribe(fn);
+ }
+ };
+ return FocusTrap;
+}());
+/**
+ * Factory that allows easy instantiation of focus traps.
+ */
+var FocusTrapFactory = (function () {
+ /**
+ * @param {?} _checker
+ * @param {?} _platform
+ * @param {?} _ngZone
+ */
+ function FocusTrapFactory(_checker, _platform, _ngZone) {
+ this._checker = _checker;
+ this._platform = _platform;
+ this._ngZone = _ngZone;
+ }
+ /**
+ * @param {?} element
+ * @param {?=} deferAnchors
+ * @return {?}
+ */
+ FocusTrapFactory.prototype.create = function (element, deferAnchors) {
+ if (deferAnchors === void 0) { deferAnchors = false; }
+ return new FocusTrap(element, this._platform, this._checker,
this._ngZone, deferAnchors);
+ };
+ FocusTrapFactory.decorators = [
+ { type: _angular_core.Injectable },
+ ];
+ /**
+ * @nocollapse
+ */
+ FocusTrapFactory.ctorParameters = function () { return [
+ { type: InteractivityChecker, },
+ { type: _angular_cdk_platform.Platform, },
+ { type: _angular_core.NgZone, },
+ ]; };
+ return FocusTrapFactory;
+}());
+/**
+ * Directive for trapping focus within a region.
+ * @deprecated
+ */
+var FocusTrapDeprecatedDirective = (function () {
+ /**
+ * @param {?} _elementRef
+ * @param {?} _focusTrapFactory
+ */
+ function FocusTrapDeprecatedDirective(_elementRef, _focusTrapFactory) {
+ this._elementRef = _elementRef;
+ this._focusTrapFactory = _focusTrapFactory;
+ this.focusTrap =
this._focusTrapFactory.create(this._elementRef.nativeElement, true);
+ }
+ Object.defineProperty(FocusTrapDeprecatedDirective.prototype, "disabled", {
+ /**
+ * Whether the focus trap is active.
+ * @return {?}
+ */
+ get: function () { return !this.focusTrap.enabled; },
+ /**
+ * @param {?} val
+ * @return {?}
+ */
+ set: function (val) {
+ this.focusTrap.enabled =
!_angular_cdk_coercion.coerceBooleanProperty(val);
+ },
+ enumerable: true,
+ configurable: true
+ });
+ /**
+ * @return {?}
+ */
+ FocusTrapDeprecatedDirective.prototype.ngOnDestroy = function () {
+ this.focusTrap.destroy();
+ };
+ /**
+ * @return {?}
+ */
+ FocusTrapDeprecatedDirective.prototype.ngAfterContentInit = function () {
+ this.focusTrap.attachAnchors();
+ };
+ FocusTrapDeprecatedDirective.decorators = [
+ { type: _angular_core.Directive, args: [{
+ selector: 'cdk-focus-trap',
+ },] },
+ ];
+ /**
+ * @nocollapse
+ */
+ FocusTrapDeprecatedDirective.ctorParameters = function () { return [
+ { type: _angular_core.ElementRef, },
+ { type: FocusTrapFactory, },
+ ]; };
+ FocusTrapDeprecatedDirective.propDecorators = {
+ 'disabled': [{ type: _angular_core.Input },],
+ };
+ return FocusTrapDeprecatedDirective;
+}());
+/**
+ * Directive for trapping focus within a region.
+ */
+var FocusTrapDirective = (function () {
+ /**
+ * @param {?} _elementRef
+ * @param {?} _focusTrapFactory
+ */
+ function FocusTrapDirective(_elementRef, _focusTrapFactory) {
+ this._elementRef = _elementRef;
+ this._focusTrapFactory = _focusTrapFactory;
+ this.focusTrap =
this._focusTrapFactory.create(this._elementRef.nativeElement, true);
+ }
+ Object.defineProperty(FocusTrapDirective.prototype, "enabled", {
+ /**
+ * Whether the focus trap is active.
+ * @return {?}
+ */
+ get: function () { return this.focusTrap.enabled; },
+ /**
+ * @param {?} value
+ * @return {?}
+ */
+ set: function (value) { this.focusTrap.enabled =
_angular_cdk_coercion.coerceBooleanProperty(value); },
+ enumerable: true,
+ configurable: true
+ });
+ /**
+ * @return {?}
+ */
+ FocusTrapDirective.prototype.ngOnDestroy = function () {
+ this.focusTrap.destroy();
+ };
+ /**
+ * @return {?}
+ */
+ FocusTrapDirective.prototype.ngAfterContentInit = function () {
+ this.focusTrap.attachAnchors();
+ };
+ FocusTrapDirective.decorators = [
+ { type: _angular_core.Directive, args: [{
+ selector: '[cdkTrapFocus]',
+ exportAs: 'cdkTrapFocus',
+ },] },
+ ];
+ /**
+ * @nocollapse
+ */
+ FocusTrapDirective.ctorParameters = function () { return [
+ { type: _angular_core.ElementRef, },
+ { type: FocusTrapFactory, },
+ ]; };
+ FocusTrapDirective.propDecorators = {
+ 'enabled': [{ type: _angular_core.Input, args: ['cdkTrapFocus',] },],
+ };
+ return FocusTrapDirective;
+}());
+
+var LIVE_ANNOUNCER_ELEMENT_TOKEN = new
_angular_core.InjectionToken('liveAnnouncerElement');
+var LiveAnnouncer = (function () {
+ /**
+ * @param {?} elementToken
+ * @param {?} platform
+ */
+ function LiveAnnouncer(elementToken, platform) {
+ // Only do anything if we're on the browser platform.
+ if (platform.isBrowser) {
+ // We inject the live element as `any` because the constructor
signature cannot reference
+ // browser globals (HTMLElement) on non-browser environments,
since having a class decorator
+ // causes TypeScript to preserve the constructor signature types.
+ this._liveElement = elementToken || this._createLiveElement();
+ }
+ }
+ /**
+ * Announces a message to screenreaders.
+ * @param {?} message Message to be announced to the screenreader
+ * @param {?=} politeness The politeness of the announcer element
+ * @return {?}
+ */
+ LiveAnnouncer.prototype.announce = function (message, politeness) {
+ var _this = this;
+ if (politeness === void 0) { politeness = 'polite'; }
+ this._liveElement.textContent = '';
+ // 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).
+ setTimeout(function () { return _this._liveElement.textContent =
message; }, 100);
+ };
+ /**
+ * @return {?}
+ */
+ LiveAnnouncer.prototype.ngOnDestroy = function () {
+ if (this._liveElement && this._liveElement.parentNode) {
+ this._liveElement.parentNode.removeChild(this._liveElement);
+ }
+ };
+ /**
+ * @return {?}
+ */
+ LiveAnnouncer.prototype._createLiveElement = function () {
+ var /** @type {?} */ liveEl = document.createElement('div');
+ liveEl.classList.add('cdk-visually-hidden');
+ liveEl.setAttribute('aria-atomic', 'true');
+ liveEl.setAttribute('aria-live', 'polite');
+ document.body.appendChild(liveEl);
+ return liveEl;
+ };
+ LiveAnnouncer.decorators = [
+ { type: _angular_core.Injectable },
+ ];
+ /**
+ * @nocollapse
+ */
+ LiveAnnouncer.ctorParameters = function () { return [
+ { type: undefined, decorators: [{ type: _angular_core.Optional }, {
type: _angular_core.Inject, args: [LIVE_ANNOUNCER_ELEMENT_TOKEN,] },] },
+ { type: _angular_cdk_platform.Platform, },
+ ]; };
+ return LiveAnnouncer;
+}());
+/**
+ * \@docs-private
+ * @param {?} parentDispatcher
+ * @param {?} liveElement
+ * @param {?} platform
+ * @return {?}
+ */
+function LIVE_ANNOUNCER_PROVIDER_FACTORY(parentDispatcher, liveElement,
platform) {
+ return parentDispatcher || new LiveAnnouncer(liveElement, platform);
+}
+/**
+ * \@docs-private
+ */
+var LIVE_ANNOUNCER_PROVIDER = {
+ // If there is already a LiveAnnouncer available, use that. Otherwise,
provide a new one.
+ provide: LiveAnnouncer,
+ deps: [
+ [new _angular_core.Optional(), new _angular_core.SkipSelf(),
LiveAnnouncer],
+ [new _angular_core.Optional(), new
_angular_core.Inject(LIVE_ANNOUNCER_ELEMENT_TOKEN)],
+ _angular_cdk_platform.Platform,
+ ],
+ useFactory: LIVE_ANNOUNCER_PROVIDER_FACTORY
+};
+
+// 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.
+var TOUCH_BUFFER_MS = 650;
+/**
+ * Monitors mouse and keyboard events to determine the cause of focus events.
+ */
+var FocusMonitor = (function () {
+ /**
+ * @param {?} _ngZone
+ * @param {?} _platform
+ */
+ function FocusMonitor(_ngZone, _platform) {
+ var _this = this;
+ 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;
+ /**
+ * Weak map of elements being monitored to their info.
+ */
+ this._elementInfo = new WeakMap();
+ this._ngZone.runOutsideAngular(function () { return
_this._registerDocumentEvents(); });
+ }
+ /**
+ * Monitors focus on an element and applies appropriate CSS classes.
+ * @param {?} element The element to monitor
+ * @param {?} renderer The renderer to use to apply CSS classes to the
element.
+ * @param {?} checkChildren Whether to count the element as focused when
its children are focused.
+ * @return {?} An observable that emits when the focus state of the
element changes.
+ * When the element is blurred, null will be emitted.
+ */
+ FocusMonitor.prototype.monitor = function (element, renderer,
checkChildren) {
+ var _this = this;
+ // Do nothing if we're not on the browser platform.
+ if (!this._platform.isBrowser) {
+ return rxjs_observable_of.of(null);
+ }
+ // Check if we're already monitoring this element.
+ if (this._elementInfo.has(element)) {
+ var /** @type {?} */ cachedInfo = this._elementInfo.get(element);
/** @type {?} */
+ ((cachedInfo)).checkChildren = checkChildren;
+ return ((cachedInfo)).subject.asObservable();
+ }
+ // Create monitored element info.
+ var /** @type {?} */ info = {
+ unlisten: function () { },
+ checkChildren: checkChildren,
+ renderer: renderer,
+ subject: new rxjs_Subject.Subject()
+ };
+ this._elementInfo.set(element, info);
+ // Start listening. We need to listen in capture phase since focus
events don't bubble.
+ var /** @type {?} */ focusListener = function (event) { return
_this._onFocus(event, element); };
+ var /** @type {?} */ blurListener = function (event) { return
_this._onBlur(event, element); };
+ this._ngZone.runOutsideAngular(function () {
+ element.addEventListener('focus', focusListener, true);
+ element.addEventListener('blur', blurListener, true);
+ });
+ // Create an unlisten function for later.
+ info.unlisten = function () {
+ element.removeEventListener('focus', focusListener, true);
+ element.removeEventListener('blur', blurListener, true);
+ };
+ return info.subject.asObservable();
+ };
+ /**
+ * Stops monitoring an element and removes all focus classes.
+ * @param {?} element The element to stop monitoring.
+ * @return {?}
+ */
+ FocusMonitor.prototype.stopMonitoring = function (element) {
+ var /** @type {?} */ elementInfo = this._elementInfo.get(element);
+ if (elementInfo) {
+ elementInfo.unlisten();
+ elementInfo.subject.complete();
+ this._setClasses(element);
+ this._elementInfo.delete(element);
+ }
+ };
+ /**
+ * Focuses the element via the specified focus origin.
+ * @param {?} element The element to focus.
+ * @param {?} origin The focus origin.
+ * @return {?}
+ */
+ FocusMonitor.prototype.focusVia = function (element, origin) {
+ this._setOriginForCurrentEventQueue(origin);
+ element.focus();
+ };
+ /**
+ * Register necessary event listeners on the document and window.
+ * @return {?}
+ */
+ FocusMonitor.prototype._registerDocumentEvents = function () {
+ var _this = this;
+ // Do nothing if we're not on the browser platform.
+ if (!this._platform.isBrowser) {
+ return;
+ }
+ // Note: we listen to events in the capture phase so we can detect
them even if the user stops
+ // propagation.
+ // On keydown record the origin and clear any touch event that may be
in progress.
+ document.addEventListener('keydown', function () {
+ _this._lastTouchTarget = null;
+ _this._setOriginForCurrentEventQueue('keyboard');
+ }, true);
+ // On mousedown record the origin only if there is not touch target,
since a mousedown can
+ // happen as a result of a touch event.
+ document.addEventListener('mousedown', function () {
+ if (!_this._lastTouchTarget) {
+ _this._setOriginForCurrentEventQueue('mouse');
+ }
+ }, true);
+ // 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 0ms).
Instead we wait 650ms to
+ // see if a focus happens.
+ document.addEventListener('touchstart', function (event) {
+ if (_this._touchTimeout != null) {
+ clearTimeout(_this._touchTimeout);
+ }
+ _this._lastTouchTarget = event.target;
+ _this._touchTimeout = setTimeout(function () { return
_this._lastTouchTarget = null; }, TOUCH_BUFFER_MS);
+ }, true);
+ // Make a note of when the window regains focus, so we can restore the
origin info for the
+ // focused element.
+ window.addEventListener('focus', function () {
+ _this._windowFocused = true;
+ setTimeout(function () { return _this._windowFocused = false; },
0);
+ });
+ };
+ /**
+ * Sets the focus classes on the element based on the given focus origin.
+ * @param {?} element The element to update the classes on.
+ * @param {?=} origin The focus origin.
+ * @return {?}
+ */
+ FocusMonitor.prototype._setClasses = function (element, origin) {
+ var /** @type {?} */ elementInfo = this._elementInfo.get(element);
+ if (elementInfo) {
+ var /** @type {?} */ toggleClass = function (className, shouldSet)
{
+ shouldSet ? elementInfo.renderer.addClass(element, className) :
+ elementInfo.renderer.removeClass(element, className);
+ };
+ toggleClass('cdk-focused', !!origin);
+ toggleClass('cdk-touch-focused', origin === 'touch');
+ toggleClass('cdk-keyboard-focused', origin === 'keyboard');
+ toggleClass('cdk-mouse-focused', origin === 'mouse');
+ toggleClass('cdk-program-focused', origin === 'program');
+ }
+ };
+ /**
+ * Sets the origin and schedules an async function to clear it at the end
of the event queue.
+ * @param {?} origin The origin to set.
+ * @return {?}
+ */
+ FocusMonitor.prototype._setOriginForCurrentEventQueue = function (origin) {
+ var _this = this;
+ this._origin = origin;
+ setTimeout(function () { return _this._origin = null; }, 0);
+ };
+ /**
+ * Checks whether the given focus event was caused by a touchstart event.
+ * @param {?} event The focus event to check.
+ * @return {?} Whether the event was caused by a touch.
+ */
+ FocusMonitor.prototype._wasCausedByTouch = function (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, renderer, '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.
+ var /** @type {?} */ 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.
+ * @param {?} event The focus event.
+ * @param {?} element The monitored element.
+ * @return {?}
+ */
+ FocusMonitor.prototype._onFocus = function (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).
+ // If we are not counting child-element-focus as focused, make sure
that the event target is the
+ // monitored element itself.
+ var /** @type {?} */ 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'.
+ if (!this._origin) {
+ if (this._windowFocused && this._lastFocusOrigin) {
+ this._origin = this._lastFocusOrigin;
+ }
+ else if (this._wasCausedByTouch(event)) {
+ this._origin = 'touch';
+ }
+ else {
+ this._origin = 'program';
+ }
+ }
+ this._setClasses(element, this._origin);
+ elementInfo.subject.next(this._origin);
+ this._lastFocusOrigin = this._origin;
+ this._origin = null;
+ };
+ /**
+ * Handles blur events on a registered element.
+ * @param {?} event The blur event.
+ * @param {?} element The monitored element.
+ * @return {?}
+ */
+ FocusMonitor.prototype._onBlur = function (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.
+ var /** @type {?} */ elementInfo = this._elementInfo.get(element);
+ if (!elementInfo || (elementInfo.checkChildren && event.relatedTarget
instanceof Node &&
+ element.contains(event.relatedTarget))) {
+ return;
+ }
+ this._setClasses(element);
+ elementInfo.subject.next(null);
+ };
+ FocusMonitor.decorators = [
+ { type: _angular_core.Injectable },
+ ];
+ /**
+ * @nocollapse
+ */
+ FocusMonitor.ctorParameters = function () { return [
+ { type: _angular_core.NgZone, },
+ { type: _angular_cdk_platform.Platform, },
+ ]; };
+ return FocusMonitor;
+}());
+/**
+ * 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.
+ */
+var CdkMonitorFocus = (function () {
+ /**
+ * @param {?} _elementRef
+ * @param {?} _focusMonitor
+ * @param {?} renderer
+ */
+ function CdkMonitorFocus(_elementRef, _focusMonitor, renderer) {
+ var _this = this;
+ this._elementRef = _elementRef;
+ this._focusMonitor = _focusMonitor;
+ this.cdkFocusChange = new _angular_core.EventEmitter();
+ this._monitorSubscription =
this._focusMonitor.monitor(this._elementRef.nativeElement, renderer,
this._elementRef.nativeElement.hasAttribute('cdkMonitorSubtreeFocus'))
+ .subscribe(function (origin) { return
_this.cdkFocusChange.emit(origin); });
+ }
+ /**
+ * @return {?}
+ */
+ CdkMonitorFocus.prototype.ngOnDestroy = function () {
+ this._focusMonitor.stopMonitoring(this._elementRef.nativeElement);
+ this._monitorSubscription.unsubscribe();
+ };
+ CdkMonitorFocus.decorators = [
+ { type: _angular_core.Directive, args: [{
+ selector: '[cdkMonitorElementFocus],
[cdkMonitorSubtreeFocus]',
+ },] },
+ ];
+ /**
+ * @nocollapse
+ */
+ CdkMonitorFocus.ctorParameters = function () { return [
+ { type: _angular_core.ElementRef, },
+ { type: FocusMonitor, },
+ { type: _angular_core.Renderer2, },
+ ]; };
+ CdkMonitorFocus.propDecorators = {
+ 'cdkFocusChange': [{ type: _angular_core.Output },],
+ };
+ return CdkMonitorFocus;
+}());
+/**
+ * \@docs-private
+ * @param {?} parentDispatcher
+ * @param {?} ngZone
+ * @param {?} platform
+ * @return {?}
+ */
+function FOCUS_MONITOR_PROVIDER_FACTORY(parentDispatcher, ngZone, platform) {
+ return parentDispatcher || new FocusMonitor(ngZone, platform);
+}
+/**
+ * \@docs-private
+ */
+var FOCUS_MONITOR_PROVIDER = {
+ // If there is already a FocusMonitor available, use that. Otherwise,
provide a new one.
+ provide: FocusMonitor,
+ deps: [[new _angular_core.Optional(), new _angular_core.SkipSelf(),
FocusMonitor], _angular_core.NgZone, _angular_cdk_platform.Platform],
+ useFactory: FOCUS_MONITOR_PROVIDER_FACTORY
+};
+
+var A11yModule = (function () {
+ function A11yModule() {
+ }
+ A11yModule.decorators = [
+ { type: _angular_core.NgModule, args: [{
+ imports: [_angular_common.CommonModule,
_angular_cdk_platform.PlatformModule],
+ declarations: [FocusTrapDirective,
FocusTrapDeprecatedDirective, CdkMonitorFocus],
+ exports: [FocusTrapDirective,
FocusTrapDeprecatedDirective, CdkMonitorFocus],
+ providers: [
+ InteractivityChecker,
+ FocusTrapFactory,
+ AriaDescriber,
+ LIVE_ANNOUNCER_PROVIDER,
+ ARIA_DESCRIBER_PROVIDER,
+ FOCUS_MONITOR_PROVIDER,
+ ]
+ },] },
+ ];
+ /**
+ * @nocollapse
+ */
+ A11yModule.ctorParameters = function () { return []; };
+ return A11yModule;
+}());
+
+exports.ActiveDescendantKeyManager = ActiveDescendantKeyManager;
+exports.MESSAGES_CONTAINER_ID = MESSAGES_CONTAINER_ID;
+exports.CDK_DESCRIBEDBY_ID_PREFIX = CDK_DESCRIBEDBY_ID_PREFIX;
+exports.CDK_DESCRIBEDBY_HOST_ATTRIBUTE = CDK_DESCRIBEDBY_HOST_ATTRIBUTE;
+exports.AriaDescriber = AriaDescriber;
+exports.ARIA_DESCRIBER_PROVIDER_FACTORY = ARIA_DESCRIBER_PROVIDER_FACTORY;
+exports.ARIA_DESCRIBER_PROVIDER = ARIA_DESCRIBER_PROVIDER;
+exports.isFakeMousedownFromScreenReader = isFakeMousedownFromScreenReader;
+exports.FocusKeyManager = FocusKeyManager;
+exports.FocusTrap = FocusTrap;
+exports.FocusTrapFactory = FocusTrapFactory;
+exports.FocusTrapDeprecatedDirective = FocusTrapDeprecatedDirective;
+exports.FocusTrapDirective = FocusTrapDirective;
+exports.InteractivityChecker = InteractivityChecker;
+exports.ListKeyManager = ListKeyManager;
+exports.LIVE_ANNOUNCER_ELEMENT_TOKEN = LIVE_ANNOUNCER_ELEMENT_TOKEN;
+exports.LiveAnnouncer = LiveAnnouncer;
+exports.LIVE_ANNOUNCER_PROVIDER_FACTORY = LIVE_ANNOUNCER_PROVIDER_FACTORY;
+exports.LIVE_ANNOUNCER_PROVIDER = LIVE_ANNOUNCER_PROVIDER;
+exports.TOUCH_BUFFER_MS = TOUCH_BUFFER_MS;
+exports.FocusMonitor = FocusMonitor;
+exports.CdkMonitorFocus = CdkMonitorFocus;
+exports.FOCUS_MONITOR_PROVIDER_FACTORY = FOCUS_MONITOR_PROVIDER_FACTORY;
+exports.FOCUS_MONITOR_PROVIDER = FOCUS_MONITOR_PROVIDER;
+exports.A11yModule = A11yModule;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+//# sourceMappingURL=cdk-a11y.umd.js.map
