import { LiveAnnouncer } from '@angular/cdk/a11y';
import { Overlay } from '@angular/cdk/overlay';
import { ComponentType } from '@angular/cdk/portal';
import { EmbeddedViewRef, InjectionToken, Injector, OnDestroy, TemplateRef, Type } from '@angular/core';
import { ITextOnlySnackBar } from './simple-snack-bar.component';
import { BaoSnackBarConfig } from './snack-bar-config';
import { IBaoSnackBarContainer } from './snack-bar-container';
import { BaoSnackBarRef } from './snack-bar-ref';
import * as i0 from "@angular/core";
export declare function baoFactory(): BaoSnackBarConfig<any>;
/** Injection token that can be used to specify default snack bar. */
export declare const BAO_SNACK_BAR_DEFAULT_OPTIONS: InjectionToken<BaoSnackBarConfig<any>>;
/**
 * Service to dispatch Material Design snack bar messages.
 */
export declare class BaoSnackBarService implements OnDestroy {
    private _overlay;
    private _live;
    private _injector;
    private _parentSnackBar;
    private _defaultConfig;
    /** The component that should be rendered as the snack bar's simple component. */
    protected simpleSnackBarComponent: Type<ITextOnlySnackBar>;
    /** The container component that attaches the provided template or component. */
    protected snackBarContainerComponent: Type<IBaoSnackBarContainer>;
    /**
     * Reference to the current snack bar in the view *at this level* (in the Angular injector tree).
     * If there is a parent snack-bar service, all operations should delegate to that parent
     * via `_openedSnackBarRef`.
     */
    private _snackBarRefAtThisLevel;
    constructor(_overlay: Overlay, _live: LiveAnnouncer, _injector: Injector, _parentSnackBar: BaoSnackBarService, _defaultConfig: BaoSnackBarConfig);
    /** Reference to the currently opened snackbar at *any* level. */
    get _openedSnackBarRef(): BaoSnackBarRef<any> | null;
    set _openedSnackBarRef(value: BaoSnackBarRef<any> | null);
    /**
     * Creates and dispatches a snack bar with a custom component for the content, removing any
     * currently opened snack bars.
     *
     * @param component Component to be instantiated.
     * @param config Extra configuration for the snack bar.
     */
    openFromComponent<T>(component: ComponentType<T>, config?: BaoSnackBarConfig): BaoSnackBarRef<T>;
    /**
     * Creates and dispatches a snack bar with a custom template for the content, removing any
     * currently opened snack bars.
     *
     * @param template Template to be instantiated.
     * @param config Extra configuration for the snack bar.
     */
    openFromTemplate(template: TemplateRef<any>, config?: BaoSnackBarConfig): BaoSnackBarRef<EmbeddedViewRef<any>>;
    /**
     * Opens a snackbar with a message and an optional action.
     * @param message The message to show in the snackbar.
     * @param toastType The type of of toast to display the snackbar.
     * @param actionLabelOrIcon The label or icon for the snackbar action.
     * @param showClose If true, the snackbar will require user interaction to close.
     * @param config Additional configuration options for the snackbar.
     */
    open(config: BaoSnackBarConfig): BaoSnackBarRef<ITextOnlySnackBar>;
    /**
     * Dismisses the currently-visible snack bar.
     */
    dismiss(): void;
    ngOnDestroy(): void;
    /**
     * Attaches the snack bar container component to the overlay.
     */
    private attachSnackBarContainer;
    /**
     * Places a new component or a template as the content of the snack bar container.
     */
    private attach;
    /** Animates the old snack bar out and the new one in. */
    private animateSnackBar;
    /**
     * Creates a new overlay and places it in the correct location.
     * @param config The user-specified snack bar config.
     */
    private createOverlay;
    /**
     * Creates an injector to be used inside of a snack bar component.
     * @param config Config that was used to create the snack bar.
     * @param snackBarRef Reference to the snack bar.
     */
    private createInjector;
    static ɵfac: i0.ɵɵFactoryDeclaration<BaoSnackBarService, [null, null, null, { optional: true; skipSelf: true; }, null]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<BaoSnackBarService>;
}