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Posted to commits@nifi.apache.org by sc...@apache.org on 2018/04/30 19:31:59 UTC
[18/51] [partial] nifi-fds git commit: update gh-pages
http://git-wip-us.apache.org/repos/asf/nifi-fds/blob/4a326208/node_modules/@angular/cdk/esm2015/a11y.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
+ */
+import { Subject } from 'rxjs/Subject';
+import { Subscription } from 'rxjs/Subscription';
+import { A, DOWN_ARROW, NINE, TAB, UP_ARROW, Z, ZERO } from '@angular/cdk/keycodes';
+import { RxChain, debounceTime, doOperator, filter, first, map } from '@angular/cdk/rxjs';
+import { Directive, ElementRef, EventEmitter, Inject, Injectable, InjectionToken, Input, NgModule, NgZone, Optional, Output, Renderer2, SkipSelf } from '@angular/core';
+import { Platform, PlatformModule } from '@angular/cdk/platform';
+import { coerceBooleanProperty } from '@angular/cdk/coercion';
+import { of } from 'rxjs/observable/of';
+import { CommonModule } from '@angular/common';
+
+/**
+ * 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.
+ */
+class ListKeyManager {
+ /**
+ * @param {?} _items
+ */
+ constructor(_items) {
+ this._items = _items;
+ this._activeItemIndex = -1;
+ this._wrap = false;
+ this._letterKeyStream = new Subject();
+ this._typeaheadSubscription = 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 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 {?}
+ */
+ withWrap() {
+ 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 {?}
+ */
+ withTypeAhead(debounceInterval = 200) {
+ if (this._items.length && this._items.some(item => 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 = RxChain.from(this._letterKeyStream)
+ .call(doOperator, keyCode => this._pressedLetters.push(keyCode))
+ .call(debounceTime, debounceInterval)
+ .call(filter, () => this._pressedLetters.length > 0)
+ .call(map, () => this._pressedLetters.join(''))
+ .subscribe(inputString => {
+ const /** @type {?} */ items = this._items.toArray();
+ // Start at 1 because we want to start searching at the item immediately
+ // following the current active item.
+ for (let /** @type {?} */ i = 1; i < items.length + 1; i++) {
+ const /** @type {?} */ index = (this._activeItemIndex + i) % items.length;
+ const /** @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 {?}
+ */
+ setActiveItem(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 {?}
+ */
+ onKeydown(event) {
+ switch (event.keyCode) {
+ case DOWN_ARROW:
+ this.setNextItemActive();
+ break;
+ case UP_ARROW:
+ this.setPreviousItemActive();
+ break;
+ case TAB:
+ this.tabOut.next();
+ return;
+ default:
+ const /** @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 >= 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);
+ }
+ /**
+ * Allows setting of the activeItemIndex without any other effects.
+ * @param {?} index The new activeItemIndex.
+ * @return {?}
+ */
+ updateActiveItemIndex(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 {?}
+ */
+ _setActiveItemByDelta(delta, 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 {?}
+ */
+ _setActiveInWrapMode(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 {?}
+ */
+ _setActiveInDefaultMode(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 {?}
+ */
+ _setActiveItemByIndex(index, fallbackDelta, items = this._items.toArray()) {
+ if (!items[index]) {
+ return;
+ }
+ while (items[index].disabled) {
+ index += fallbackDelta;
+ if (!items[index]) {
+ return;
+ }
+ }
+ this.setActiveItem(index);
+ }
+}
+
+class ActiveDescendantKeyManager extends ListKeyManager {
+ /**
+ * 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 {?}
+ */
+ setActiveItem(index) {
+ if (this.activeItem) {
+ this.activeItem.setInactiveStyles();
+ }
+ super.setActiveItem(index);
+ if (this.activeItem) {
+ this.activeItem.setActiveStyles();
+ }
+ }
+}
+
+/**
+ * IDs are deliminated by an empty space, as per the spec.
+ */
+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) {
+ const /** @type {?} */ ids = getAriaReferenceIds(el, attr);
+ if (ids.some(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) {
+ const /** @type {?} */ ids = getAriaReferenceIds(el, attr);
+ const /** @type {?} */ filteredIds = ids.filter(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) || [];
+}
+
+/**
+ * ID used for the body container where all messages are appended.
+ */
+const MESSAGES_CONTAINER_ID = 'cdk-describedby-message-container';
+/**
+ * ID prefix used for each created message element.
+ */
+const CDK_DESCRIBEDBY_ID_PREFIX = 'cdk-describedby-message';
+/**
+ * Attribute given to each host element that is described by a message element.
+ */
+const CDK_DESCRIBEDBY_HOST_ATTRIBUTE = 'cdk-describedby-host';
+/**
+ * Global incremental identifier for each registered message element.
+ */
+let nextId = 0;
+/**
+ * Global map of all registered message elements that have been placed into the document.
+ */
+const messageRegistry = new Map();
+/**
+ * Container for all registered messages.
+ */
+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.
+ * \@docs-private
+ */
+class AriaDescriber {
+ /**
+ * @param {?} _platform
+ */
+ constructor(_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 {?}
+ */
+ describe(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 {?}
+ */
+ removeDescription(hostElement, message) {
+ if (!this._platform.isBrowser || !message.trim()) {
+ return;
+ }
+ if (isElementDescribedByMessage(hostElement, message)) {
+ removeMessageReference(hostElement, message);
+ }
+ const /** @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 {?}
+ */
+ ngOnDestroy() {
+ if (!this._platform.isBrowser) {
+ return;
+ }
+ const /** @type {?} */ describedElements = document.querySelectorAll(`[${CDK_DESCRIBEDBY_HOST_ATTRIBUTE}]`);
+ for (let /** @type {?} */ i = 0; i < describedElements.length; i++) {
+ removeCdkDescribedByReferenceIds(describedElements[i]);
+ describedElements[i].removeAttribute(CDK_DESCRIBEDBY_HOST_ATTRIBUTE);
+ }
+ if (messagesContainer) {
+ deleteMessagesContainer();
+ }
+ messageRegistry.clear();
+ }
+}
+AriaDescriber.decorators = [
+ { type: Injectable },
+];
+/**
+ * @nocollapse
+ */
+AriaDescriber.ctorParameters = () => [
+ { type: Platform, },
+];
+/**
+ * Creates a new element in the visually hidden message container element with the message
+ * as its content and adds it to the message registry.
+ * @param {?} message
+ * @return {?}
+ */
+function createMessageElement(message) {
+ const /** @type {?} */ messageElement = document.createElement('div');
+ messageElement.setAttribute('id', `${CDK_DESCRIBEDBY_ID_PREFIX}-${nextId++}`);
+ messageElement.appendChild(/** @type {?} */ ((document.createTextNode(message))));
+ if (!messagesContainer) {
+ createMessagesContainer();
+ } /** @type {?} */
+ ((messagesContainer)).appendChild(messageElement);
+ messageRegistry.set(message, { messageElement, referenceCount: 0 });
+}
+/**
+ * Deletes the message element from the global messages container.
+ * @param {?} message
+ * @return {?}
+ */
+function deleteMessageElement(message) {
+ const /** @type {?} */ registeredMessage = messageRegistry.get(message);
+ const /** @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
+ const /** @type {?} */ originalReferenceIds = getAriaReferenceIds(element, 'aria-describedby')
+ .filter(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.
+ * @param {?} element
+ * @param {?} message
+ * @return {?}
+ */
+function addMessageReference(element, message) {
+ const /** @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) {
+ const /** @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) {
+ const /** @type {?} */ referenceIds = getAriaReferenceIds(element, 'aria-describedby');
+ const /** @type {?} */ registeredMessage = messageRegistry.get(message);
+ const /** @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
+ */
+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],
+ 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;
+}
+
+class FocusKeyManager extends ListKeyManager {
+ /**
+ * This method sets the active item to the item at the specified index.
+ * It also adds focuses the newly active item.
+ * @param {?} index
+ * @return {?}
+ */
+ setActiveItem(index) {
+ super.setActiveItem(index);
+ if (this.activeItem) {
+ this.activeItem.focus();
+ }
+ }
+}
+
+/**
+ * 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 the server 😎
+ if (!this._platform.isBrowser) {
+ return false;
+ }
+ let /** @type {?} */ frameElement = (getWindow(element).frameElement);
+ if (frameElement) {
+ let /** @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;
+ }
+ }
+ let /** @type {?} */ nodeName = element.nodeName.toLowerCase();
+ let /** @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.
+ */
+ 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 },
+];
+/**
+ * @nocollapse
+ */
+InteractivityChecker.ctorParameters = () => [
+ { type: Platform, },
+];
+/**
+ * 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) {
+ let /** @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;
+ }
+ let /** @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
+ const /** @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) {
+ let /** @type {?} */ nodeName = element.nodeName.toLowerCase();
+ let /** @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.
+ */
+class FocusTrap {
+ /**
+ * @param {?} _element
+ * @param {?} _platform
+ * @param {?} _checker
+ * @param {?} _ngZone
+ * @param {?=} deferAnchors
+ */
+ constructor(_element, _platform, _checker, _ngZone, deferAnchors = false) {
+ this._element = _element;
+ this._platform = _platform;
+ this._checker = _checker;
+ this._ngZone = _ngZone;
+ this._enabled = true;
+ if (!deferAnchors) {
+ this.attachAnchors();
+ }
+ }
+ /**
+ * Whether the focus trap is active.
+ * @return {?}
+ */
+ get enabled() { return this._enabled; }
+ /**
+ * @param {?} val
+ * @return {?}
+ */
+ set enabled(val) {
+ this._enabled = val;
+ if (this._startAnchor && this._endAnchor) {
+ this._startAnchor.tabIndex = this._endAnchor.tabIndex = this._enabled ? 0 : -1;
+ }
+ }
+ /**
+ * Destroys the focus trap by cleaning up the anchors.
+ * @return {?}
+ */
+ destroy() {
+ 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 {?}
+ */
+ attachAnchors() {
+ // 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(() => {
+ ((this._startAnchor)).addEventListener('focus', () => {
+ this.focusLastTabbableElement();
+ }); /** @type {?} */
+ ((this._endAnchor)).addEventListener('focus', () => {
+ 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.
+ */
+ focusInitialElementWhenReady() {
+ return new Promise(resolve => {
+ this._executeOnStable(() => 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(resolve => {
+ this._executeOnStable(() => 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(resolve => {
+ this._executeOnStable(() => 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.
+ */
+ _getRegionBoundary(bound) {
+ // Contains the deprecated version of selector, for temporary backwards comparability.
+ let /** @type {?} */ markers = (this._element.querySelectorAll(`[cdk-focus-region-${bound}], ` +
+ `[cdk-focus-${bound}]`));
+ for (let /** @type {?} */ i = 0; i < markers.length; i++) {
+ if (markers[i].hasAttribute(`cdk-focus-${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.
+ */
+ focusInitialElement() {
+ const /** @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.
+ */
+ focusFirstTabbableElement() {
+ const /** @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.
+ */
+ focusLastTabbableElement() {
+ const /** @type {?} */ redirectToElement = this._getRegionBoundary('end');
+ if (redirectToElement) {
+ redirectToElement.focus();
+ }
+ return !!redirectToElement;
+ }
+ /**
+ * Get the first tabbable element from a DOM subtree (inclusive).
+ * @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.
+ let /** @type {?} */ children = root.children || root.childNodes;
+ for (let /** @type {?} */ i = 0; i < children.length; i++) {
+ let /** @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 {?}
+ */
+ _getLastTabbableElement(root) {
+ if (this._checker.isFocusable(root) && this._checker.isTabbable(root)) {
+ return root;
+ }
+ // Iterate in reverse DOM order.
+ let /** @type {?} */ children = root.children || root.childNodes;
+ for (let /** @type {?} */ i = children.length - 1; i >= 0; i--) {
+ let /** @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 {?}
+ */
+ _createAnchor() {
+ let /** @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 {?}
+ */
+ _executeOnStable(fn) {
+ if (this._ngZone.isStable) {
+ fn();
+ }
+ else {
+ first.call(this._ngZone.onStable.asObservable()).subscribe(fn);
+ }
+ }
+}
+/**
+ * Factory that allows easy instantiation of focus traps.
+ */
+class FocusTrapFactory {
+ /**
+ * @param {?} _checker
+ * @param {?} _platform
+ * @param {?} _ngZone
+ */
+ constructor(_checker, _platform, _ngZone) {
+ this._checker = _checker;
+ this._platform = _platform;
+ this._ngZone = _ngZone;
+ }
+ /**
+ * @param {?} element
+ * @param {?=} deferAnchors
+ * @return {?}
+ */
+ create(element, deferAnchors = false) {
+ return new FocusTrap(element, this._platform, this._checker, this._ngZone, deferAnchors);
+ }
+}
+FocusTrapFactory.decorators = [
+ { type: Injectable },
+];
+/**
+ * @nocollapse
+ */
+FocusTrapFactory.ctorParameters = () => [
+ { type: InteractivityChecker, },
+ { type: Platform, },
+ { type: NgZone, },
+];
+/**
+ * Directive for trapping focus within a region.
+ * @deprecated
+ */
+class FocusTrapDeprecatedDirective {
+ /**
+ * @param {?} _elementRef
+ * @param {?} _focusTrapFactory
+ */
+ constructor(_elementRef, _focusTrapFactory) {
+ this._elementRef = _elementRef;
+ this._focusTrapFactory = _focusTrapFactory;
+ this.focusTrap = this._focusTrapFactory.create(this._elementRef.nativeElement, true);
+ }
+ /**
+ * Whether the focus trap is active.
+ * @return {?}
+ */
+ get disabled() { return !this.focusTrap.enabled; }
+ /**
+ * @param {?} val
+ * @return {?}
+ */
+ set disabled(val) {
+ this.focusTrap.enabled = !coerceBooleanProperty(val);
+ }
+ /**
+ * @return {?}
+ */
+ ngOnDestroy() {
+ this.focusTrap.destroy();
+ }
+ /**
+ * @return {?}
+ */
+ ngAfterContentInit() {
+ this.focusTrap.attachAnchors();
+ }
+}
+FocusTrapDeprecatedDirective.decorators = [
+ { type: Directive, args: [{
+ selector: 'cdk-focus-trap',
+ },] },
+];
+/**
+ * @nocollapse
+ */
+FocusTrapDeprecatedDirective.ctorParameters = () => [
+ { type: ElementRef, },
+ { type: FocusTrapFactory, },
+];
+FocusTrapDeprecatedDirective.propDecorators = {
+ 'disabled': [{ type: Input },],
+};
+/**
+ * Directive for trapping focus within a region.
+ */
+class FocusTrapDirective {
+ /**
+ * @param {?} _elementRef
+ * @param {?} _focusTrapFactory
+ */
+ constructor(_elementRef, _focusTrapFactory) {
+ this._elementRef = _elementRef;
+ this._focusTrapFactory = _focusTrapFactory;
+ 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); }
+ /**
+ * @return {?}
+ */
+ ngOnDestroy() {
+ this.focusTrap.destroy();
+ }
+ /**
+ * @return {?}
+ */
+ ngAfterContentInit() {
+ this.focusTrap.attachAnchors();
+ }
+}
+FocusTrapDirective.decorators = [
+ { type: Directive, args: [{
+ selector: '[cdkTrapFocus]',
+ exportAs: 'cdkTrapFocus',
+ },] },
+];
+/**
+ * @nocollapse
+ */
+FocusTrapDirective.ctorParameters = () => [
+ { type: ElementRef, },
+ { type: FocusTrapFactory, },
+];
+FocusTrapDirective.propDecorators = {
+ 'enabled': [{ type: Input, args: ['cdkTrapFocus',] },],
+};
+
+const LIVE_ANNOUNCER_ELEMENT_TOKEN = new InjectionToken('liveAnnouncerElement');
+class LiveAnnouncer {
+ /**
+ * @param {?} elementToken
+ * @param {?} platform
+ */
+ constructor(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 {?}
+ */
+ announce(message, 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(() => this._liveElement.textContent = message, 100);
+ }
+ /**
+ * @return {?}
+ */
+ ngOnDestroy() {
+ if (this._liveElement && this._liveElement.parentNode) {
+ this._liveElement.parentNode.removeChild(this._liveElement);
+ }
+ }
+ /**
+ * @return {?}
+ */
+ _createLiveElement() {
+ let /** @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: Injectable },
+];
+/**
+ * @nocollapse
+ */
+LiveAnnouncer.ctorParameters = () => [
+ { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [LIVE_ANNOUNCER_ELEMENT_TOKEN,] },] },
+ { type: Platform, },
+];
+/**
+ * \@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
+ */
+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)],
+ 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.
+const TOUCH_BUFFER_MS = 650;
+/**
+ * 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;
+ /**
+ * Weak map of elements being monitored to their info.
+ */
+ this._elementInfo = new WeakMap();
+ this._ngZone.runOutsideAngular(() => 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.
+ */
+ monitor(element, renderer, checkChildren) {
+ // Do nothing if we're not on the browser platform.
+ if (!this._platform.isBrowser) {
+ return of(null);
+ }
+ // Check if we're already monitoring this element.
+ if (this._elementInfo.has(element)) {
+ let /** @type {?} */ cachedInfo = this._elementInfo.get(element); /** @type {?} */
+ ((cachedInfo)).checkChildren = checkChildren;
+ return ((cachedInfo)).subject.asObservable();
+ }
+ // Create monitored element info.
+ let /** @type {?} */ info = {
+ unlisten: () => { },
+ checkChildren: checkChildren,
+ renderer: renderer,
+ subject: new Subject()
+ };
+ this._elementInfo.set(element, info);
+ // Start listening. We need to listen in capture phase since focus events don't bubble.
+ let /** @type {?} */ focusListener = (event) => this._onFocus(event, element);
+ let /** @type {?} */ blurListener = (event) => this._onBlur(event, element);
+ this._ngZone.runOutsideAngular(() => {
+ element.addEventListener('focus', focusListener, true);
+ element.addEventListener('blur', blurListener, true);
+ });
+ // Create an unlisten function for later.
+ info.unlisten = () => {
+ 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 {?}
+ */
+ stopMonitoring(element) {
+ let /** @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 {?}
+ */
+ focusVia(element, origin) {
+ this._setOriginForCurrentEventQueue(origin);
+ element.focus();
+ }
+ /**
+ * Register necessary event listeners on the document and window.
+ * @return {?}
+ */
+ _registerDocumentEvents() {
+ // 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', () => {
+ 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', () => {
+ 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', (event) => {
+ if (this._touchTimeout != null) {
+ clearTimeout(this._touchTimeout);
+ }
+ this._lastTouchTarget = event.target;
+ this._touchTimeout = setTimeout(() => 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', () => {
+ this._windowFocused = true;
+ setTimeout(() => 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 {?}
+ */
+ _setClasses(element, origin) {
+ const /** @type {?} */ elementInfo = this._elementInfo.get(element);
+ if (elementInfo) {
+ const /** @type {?} */ toggleClass = (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 {?}
+ */
+ _setOriginForCurrentEventQueue(origin) {
+ this._origin = origin;
+ setTimeout(() => 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.
+ */
+ _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, 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.
+ let /** @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 {?}
+ */
+ _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).
+ // If we are not counting child-element-focus as focused, make sure that the event target is the
+ // monitored element itself.
+ const /** @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 {?}
+ */
+ _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.
+ const /** @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: Injectable },
+];
+/**
+ * @nocollapse
+ */
+FocusMonitor.ctorParameters = () => [
+ { type: NgZone, },
+ { type: Platform, },
+];
+/**
+ * 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
+ * @param {?} renderer
+ */
+ constructor(_elementRef, _focusMonitor, renderer) {
+ this._elementRef = _elementRef;
+ this._focusMonitor = _focusMonitor;
+ this.cdkFocusChange = new EventEmitter();
+ this._monitorSubscription = this._focusMonitor.monitor(this._elementRef.nativeElement, renderer, this._elementRef.nativeElement.hasAttribute('cdkMonitorSubtreeFocus'))
+ .subscribe(origin => this.cdkFocusChange.emit(origin));
+ }
+ /**
+ * @return {?}
+ */
+ ngOnDestroy() {
+ this._focusMonitor.stopMonitoring(this._elementRef.nativeElement);
+ this._monitorSubscription.unsubscribe();
+ }
+}
+CdkMonitorFocus.decorators = [
+ { type: Directive, args: [{
+ selector: '[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]',
+ },] },
+];
+/**
+ * @nocollapse
+ */
+CdkMonitorFocus.ctorParameters = () => [
+ { type: ElementRef, },
+ { type: FocusMonitor, },
+ { type: Renderer2, },
+];
+CdkMonitorFocus.propDecorators = {
+ 'cdkFocusChange': [{ type: Output },],
+};
+/**
+ * \@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
+ */
+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
+};
+
+class A11yModule {
+}
+A11yModule.decorators = [
+ { type: NgModule, args: [{
+ imports: [CommonModule, 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 = () => [];
+
+/**
+ * Generated bundle index. Do not edit.
+ */
+
+export { ActiveDescendantKeyManager, MESSAGES_CONTAINER_ID, CDK_DESCRIBEDBY_ID_PREFIX, CDK_DESCRIBEDBY_HOST_ATTRIBUTE, AriaDescriber, ARIA_DESCRIBER_PROVIDER_FACTORY, ARIA_DESCRIBER_PROVIDER, isFakeMousedownFromScreenReader, FocusKeyManager, FocusTrap, FocusTrapFactory, FocusTrapDeprecatedDirective, FocusTrapDirective, InteractivityChecker, ListKeyManager, LIVE_ANNOUNCER_ELEMENT_TOKEN, LiveAnnouncer, LIVE_ANNOUNCER_PROVIDER_FACTORY, LIVE_ANNOUNCER_PROVIDER, TOUCH_BUFFER_MS, FocusMonitor, CdkMonitorFocus, FOCUS_MONITOR_PROVIDER_FACTORY, FOCUS_MONITOR_PROVIDER, A11yModule };
+//# sourceMappingURL=a11y.js.map