import { Dialog } from '@angular/cdk/dialog';
import { Observable } from 'rxjs';
import { NgxModalActionType, NgxModalConfiguration, NgxModalOptions } from '../../types';
import * as i0 from "@angular/core";
/**
 * A wrapper service to Angular CDK Dialog that provides a WCAG/ARIA compliant implementation of modals
 *
 * @export
 * @class NgxModalService
 */
export declare class NgxModalService {
    private readonly configuration;
    private readonly dialogService;
    /**
     * A subject that keeps track of whether a modal is currently active
     */
    private hasModalSubject;
    /**
     * An observable that keeps track of whether a modal is currently active.
     */
    readonly hasActiveModal$: Observable<boolean>;
    constructor(configuration: NgxModalConfiguration, dialogService: Dialog);
    /**
     * Opens a modal based on the provided options
     *
     * @param {NgxModalOptions<ActionType>} options - The modal options
     */
    open<ActionType extends NgxModalActionType = string, DataType = any>(options: NgxModalOptions<ActionType, DataType>): Observable<ActionType>;
    /**
     * Closes the currently active modal
     *
     * * @param onClose - An optional onClose function
     */
    close(onClose?: () => void): void;
    /**
     * Checks if all the necessary preconditions are met
     *
     * @param options - The options of the modal
     * @param  component - The component we wish to render
     */
    private runARIAChecks;
    /**
     * Creates the modal component
     *
     * @param options - The options of the modal
     * @param  component - The component we wish to render
     */
    private createModalComponent;
    /**
     * Checks if the description is provided when the role requires it
     *
     * @param options - The options of the modal
     */
    private hasRequiredDescription;
    /**
     * Returns a value based on whether one of the overwrites is defined
     *
     * @private
     * @param configurationValue - The overwrite on configuration level
     * @param optionsValue - The overwrite on options level
     * @param defaultValue - The default value if no overwrite was defined
     */
    private getValue;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxModalService, [{ optional: true; }, null]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgxModalService>;
}