| /** |
| * @license |
| * Copyright Google LLC All Rights Reserved. |
| * |
| * Use of this source code is governed by an MIT-style license that can be |
| * found in the LICENSE file at https://angular.io/license |
| */ |
| import { FocusTrapInertStrategy } from './focus-trap-inert-strategy'; |
| import { ConfigurableFocusTrap } from './configurable-focus-trap'; |
| /** |
| * Lightweight FocusTrapInertStrategy that adds a document focus event |
| * listener to redirect focus back inside the FocusTrap. |
| */ |
| export declare class EventListenerFocusTrapInertStrategy implements FocusTrapInertStrategy { |
| /** Focus event handler. */ |
| private _listener; |
| /** Adds a document event listener that keeps focus inside the FocusTrap. */ |
| preventFocus(focusTrap: ConfigurableFocusTrap): void; |
| /** Removes the event listener added in preventFocus. */ |
| allowFocus(focusTrap: ConfigurableFocusTrap): void; |
| /** |
| * Refocuses the first element in the FocusTrap if the focus event target was outside |
| * the FocusTrap. |
| * |
| * This is an event listener callback. The event listener is added in runOutsideAngular, |
| * so all this code runs outside Angular as well. |
| */ |
| private _trapFocus; |
| } |