/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports,require("@angular/common"),require("@angular/core"),require("rxjs"),require("@angular/cdk/keycodes"),require("rxjs/operators"),require("@angular/cdk/platform"),require("@angular/cdk/coercion"),require("@angular/cdk/observers")):"function"==typeof define&&define.amd?define("@angular/cdk/a11y",["exports","@angular/common","@angular/core","rxjs","@angular/cdk/keycodes","rxjs/operators","@angular/cdk/platform","@angular/cdk/coercion","@angular/cdk/observers"],t):t((e.ng=e.ng||{},e.ng.cdk=e.ng.cdk||{},e.ng.cdk.a11y={}),e.ng.common,e.ng.core,e.rxjs,e.ng.cdk.keycodes,e.rxjs.operators,e.ng.cdk.platform,e.ng.cdk.coercion,e.ng.cdk.observers)}(this,function(e,t,n,r,i,o,s,c,u){"use strict";function a(e,t){function n(){this.constructor=e}L(e,t),e.prototype=null===t?Object.create(t):(n.prototype=t.prototype,new n)}function d(e,t,n){var r=h(e,t);r.some(function(e){return 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0,decorators:[{type:n.Optional},{type:n.Inject,args:[q]}]}]},e.ngInjectableDef=n.ɵɵdefineInjectable({factory:function(){return new e(n.ɵɵinject(W,8),n.ɵɵinject(n.NgZone),n.ɵɵinject(t.DOCUMENT),n.ɵɵinject(q,8))},token:e,providedIn:"root"}),e}(),Y=function(){function e(e,t,n,r){this._elementRef=e,this._liveAnnouncer=t,this._contentObserver=n,this._ngZone=r,this._politeness="off"}return Object.defineProperty(e.prototype,"politeness",{get:function(){return this._politeness},set:function(e){var t=this;this._politeness="polite"===e||"assertive"===e?e:"off","off"===this._politeness?this._subscription&&(this._subscription.unsubscribe(),this._subscription=null):this._subscription||(this._subscription=this._ngZone.runOutsideAngular(function(){return t._contentObserver.observe(t._elementRef).subscribe(function(){var e=t._elementRef.nativeElement.textContent;e!==t._previousAnnouncedText&&(t._liveAnnouncer.announce(e,t._politeness),t._previousAnnouncedText=e)})}))},enumerable:!0,configurable:!0}),e.prototype.ngOnDestroy=function(){this._subscription&&this._subscription.unsubscribe()},e.decorators=[{type:n.Directive,args:[{selector:"[cdkAriaLive]",exportAs:"cdkAriaLive"}]}],e.ctorParameters=function(){return[{type:n.ElementRef},{type:z},{type:u.ContentObserver},{type:n.NgZone}]},e.propDecorators={politeness:[{type:n.Input,args:["cdkAriaLive"]}]},e}(),Q={provide:z,deps:[[new n.Optional,new n.SkipSelf,z],[new n.Optional,new n.Inject(W)],t.DOCUMENT,n.NgZone],useFactory:C},H=650,G=s.normalizePassiveListenerOptions({passive:!0,capture:!0}),X=function(){function e(e,t){var n=this;this._ngZone=e,this._platform=t,this._origin=null,this._windowFocused=!1,this._elementInfo=new Map,this._monitoredElementCount=0,this._documentKeydownListener=function(){n._lastTouchTarget=null,n._setOriginForCurrentEventQueue("keyboard")},this._documentMousedownListener=function(){n._lastTouchTarget||n._setOriginForCurrentEventQueue("mouse")},this._documentTouchstartListener=function(e){null!=n._touchTimeoutId&&clearTimeout(n._touchTimeoutId),n._lastTouchTarget=e.composedPath?e.composedPath()[0]:e.target,n._touchTimeoutId=setTimeout(function(){return n._lastTouchTarget=null},H)},this._windowFocusListener=function(){n._windowFocused=!0,n._windowFocusTimeoutId=setTimeout(function(){return n._windowFocused=!1})}}return e.prototype.monitor=function(e,t){var n=this;if(void 0===t&&(t=!1),!this._platform.isBrowser)return r.of(null);var i=c.coerceElement(e);if(this._elementInfo.has(i)){var o=this._elementInfo.get(i);return o.checkChildren=t,o.subject.asObservable()}var s={unlisten:function(){},checkChildren:t,subject:new r.Subject};this._elementInfo.set(i,s),this._incrementMonitoredElementCount();var u=function(e){return n._onFocus(e,i)},a=function(e){return n._onBlur(e,i)};return this._ngZone.runOutsideAngular(function(){i.addEventListener("focus",u,!0),i.addEventListener("blur",a,!0)}),s.unlisten=function(){i.removeEventListener("focus",u,!0),i.removeEventListener("blur",a,!0)},s.subject.asObservable()},e.prototype.stopMonitoring=function(e){var t=c.coerceElement(e),n=this._elementInfo.get(t);n&&(n.unlisten(),n.subject.complete(),this._setClasses(t),this._elementInfo.delete(t),this._decrementMonitoredElementCount())},e.prototype.focusVia=function(e,t,n){var r=c.coerceElement(e);this._setOriginForCurrentEventQueue(t),"function"==typeof r.focus&&r.focus(n)},e.prototype.ngOnDestroy=function(){var e=this;this._elementInfo.forEach(function(t,n){return e.stopMonitoring(n)})},e.prototype._toggleClass=function(e,t,n){n?e.classList.add(t):e.classList.remove(t)},e.prototype._setClasses=function(e,t){this._elementInfo.get(e)&&(this._toggleClass(e,"cdk-focused",!!t),this._toggleClass(e,"cdk-touch-focused","touch"===t),this._toggleClass(e,"cdk-keyboard-focused","keyboard"===t),this._toggleClass(e,"cdk-mouse-focused","mouse"===t),this._toggleClass(e,"cdk-program-focused","program"===t))},e.prototype._setOriginForCurrentEventQueue=function(e){var t=this;this._ngZone.runOutsideAngular(function(){t._origin=e,t._originTimeoutId=setTimeout(function(){return t._origin=null},1)})},e.prototype._wasCausedByTouch=function(e){var t=e.target;return this._lastTouchTarget instanceof Node&&t instanceof Node&&(t===this._lastTouchTarget||t.contains(this._lastTouchTarget))},e.prototype._onFocus=function(e,t){var n=this._elementInfo.get(t);if(n&&(n.checkChildren||t===e.target)){var r=this._origin;r||(r=this._windowFocused&&this._lastFocusOrigin?this._lastFocusOrigin:this._wasCausedByTouch(e)?"touch":"program"),this._setClasses(t,r),this._emitOrigin(n.subject,r),this._lastFocusOrigin=r}},e.prototype._onBlur=function(e,t){var n=this._elementInfo.get(t);!n||n.checkChildren&&e.relatedTarget instanceof Node&&t.contains(e.relatedTarget)||(this._setClasses(t),this._emitOrigin(n.subject,null))},e.prototype._emitOrigin=function(e,t){this._ngZone.run(function(){return e.next(t)})},e.prototype._incrementMonitoredElementCount=function(){var e=this;1==++this._monitoredElementCount&&this._platform.isBrowser&&this._ngZone.runOutsideAngular(function(){document.addEventListener("keydown",e._documentKeydownListener,G),document.addEventListener("mousedown",e._documentMousedownListener,G),document.addEventListener("touchstart",e._documentTouchstartListener,G),window.addEventListener("focus",e._windowFocusListener)})},e.prototype._decrementMonitoredElementCount=function(){--this._monitoredElementCount||(document.removeEventListener("keydown",this._documentKeydownListener,G),document.removeEventListener("mousedown",this._documentMousedownListener,G),document.removeEventListener("touchstart",this._documentTouchstartListener,G),window.removeEventListener("focus",this._windowFocusListener),clearTimeout(this._windowFocusTimeoutId),clearTimeout(this._touchTimeoutId),clearTimeout(this._originTimeoutId))},e.decorators=[{type:n.Injectable,args:[{providedIn:"root"}]}],e.ctorParameters=function(){return[{type:n.NgZone},{type:s.Platform}]},e.ngInjectableDef=n.ɵɵdefineInjectable({factory:function(){return new e(n.ɵɵinject(n.NgZone),n.ɵɵinject(s.Platform))},token:e,providedIn:"root"}),e}(),J=function(){function e(e,t){var r=this;this._elementRef=e,this._focusMonitor=t,this.cdkFocusChange=new n.EventEmitter,this._monitorSubscription=this._focusMonitor.monitor(this._elementRef,this._elementRef.nativeElement.hasAttribute("cdkMonitorSubtreeFocus")).subscribe(function(e){return r.cdkFocusChange.emit(e)})}return e.prototype.ngOnDestroy=function(){this._focusMonitor.stopMonitoring(this._elementRef),this._monitorSubscription.unsubscribe()},e.decorators=[{type:n.Directive,args:[{selector:"[cdkMonitorElementFocus], [cdkMonitorSubtreeFocus]"}]}],e.ctorParameters=function(){return[{type:n.ElementRef},{type:X}]},e.propDecorators={cdkFocusChange:[{type:n.Output}]},e}(),$={provide:X,deps:[[new n.Optional,new n.SkipSelf,X],n.NgZone,s.Platform],useFactory:w},ee=function(){function e(){}return e.decorators=[{type:n.NgModule,args:[{imports:[t.CommonModule,s.PlatformModule,u.ObserversModule],declarations:[Y,V,J],exports:[Y,V,J]}]}],e}();e.ARIA_DESCRIBER_PROVIDER_FACTORY=p,e.MESSAGES_CONTAINER_ID="cdk-describedby-message-container",e.CDK_DESCRIBEDBY_ID_PREFIX="cdk-describedby-message",e.CDK_DESCRIBEDBY_HOST_ATTRIBUTE="cdk-describedby-host",e.AriaDescriber=D,e.ARIA_DESCRIBER_PROVIDER=j,e.ActiveDescendantKeyManager=S,e.FocusKeyManager=B,e.ListKeyManager=P,e.FocusTrap=Z,e.FocusTrapFactory=U,e.CdkTrapFocus=V,e.InteractivityChecker=K,e.LIVE_ANNOUNCER_PROVIDER_FACTORY=C,e.LiveAnnouncer=z,e.CdkAriaLive=Y,e.LIVE_ANNOUNCER_PROVIDER=Q,e.LIVE_ANNOUNCER_ELEMENT_TOKEN_FACTORY=O,e.LIVE_ANNOUNCER_ELEMENT_TOKEN=W,e.LIVE_ANNOUNCER_DEFAULT_OPTIONS=q,e.FOCUS_MONITOR_PROVIDER_FACTORY=w,e.TOUCH_BUFFER_MS=H,e.FocusMonitor=X,e.CdkMonitorFocus=J,e.FOCUS_MONITOR_PROVIDER=$,e.isFakeMousedownFromScreenReader=N,e.A11yModule=ee,Object.defineProperty(e,"__esModule",{value:!0})});
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