import { Injector, ComponentFactoryResolver } from '@angular/core';
import { UsaModalOptions, UsaModalConfig } from './modal-config';
import { UsaModalRef } from './modal-ref';
import { UsaModalStack } from './modal-stack';
import * as i0 from "@angular/core";
/**
 * A service for opening modal windows.
 *
 * Creating a modal is straightforward: create a component or a template and pass it as an argument to
 * the `.open()` method.
 */
export declare class UsaModalService {
    private _moduleCFR;
    private _injector;
    private _modalStack;
    private _config;
    constructor(_moduleCFR: ComponentFactoryResolver, _injector: Injector, _modalStack: UsaModalStack, _config: UsaModalConfig);
    /**
     * Opens a new modal window with the specified content and supplied options.
     *
     * Content can be provided as a `TemplateRef` or a component type. If you pass a component type as content,
     * then instances of those components can be injected with an instance of the `UsaActiveModal` class. You can then
     * use `UsaActiveModal` methods to close / dismiss modals from "inside" of your component.
     */
    open(content: any, options?: UsaModalOptions): UsaModalRef;
    /**
     * Returns an observable that holds the active modal instances.
     */
    get activeInstances(): import("@angular/core").EventEmitter<UsaModalRef[]>;
    /**
     * Dismisses all currently displayed modal windows with the supplied reason.
     *
     * @since 3.1.0
     */
    dismissAll(reason?: any): void;
    /**
     * Indicates if there are currently any open modal windows in the application.
     *
     * @since 3.3.0
     */
    hasOpenModals(): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<UsaModalService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UsaModalService>;
}