source: trip-planner-front/node_modules/@angular/cdk/esm2015/a11y/focus-trap/configurable-focus-trap.js@ e29cc2e

/**
 * @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 { FocusTrap } from './focus-trap';
/**
 * Class that allows for trapping focus within a DOM element.
 *
 * This class uses a strategy pattern that determines how it traps focus.
 * See FocusTrapInertStrategy.
 */
export class ConfigurableFocusTrap extends FocusTrap {
    constructor(_element, _checker, _ngZone, _document, _focusTrapManager, _inertStrategy, config) {
        super(_element, _checker, _ngZone, _document, config.defer);
        this._focusTrapManager = _focusTrapManager;
        this._inertStrategy = _inertStrategy;
        this._focusTrapManager.register(this);
    }
    /** Whether the FocusTrap is enabled. */
    get enabled() { return this._enabled; }
    set enabled(value) {
        this._enabled = value;
        if (this._enabled) {
            this._focusTrapManager.register(this);
        }
        else {
            this._focusTrapManager.deregister(this);
        }
    }
    /** Notifies the FocusTrapManager that this FocusTrap will be destroyed. */
    destroy() {
        this._focusTrapManager.deregister(this);
        super.destroy();
    }
    /** @docs-private Implemented as part of ManagedFocusTrap. */
    _enable() {
        this._inertStrategy.preventFocus(this);
        this.toggleAnchors(true);
    }
    /** @docs-private Implemented as part of ManagedFocusTrap. */
    _disable() {
        this._inertStrategy.allowFocus(this);
        this.toggleAnchors(false);
    }
}
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