import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
import { OnDestroy, OnInit } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * A directive that is designed to work alongside CdkVirtualScrollViewport
 * which triggers the viewport size check when the windows is resized
 * or when the input length is changed.
 *
 * @export
 */
export declare class UiVirtualScrollViewportResizeDirective implements OnInit, OnDestroy {
    private readonly _viewport;
    private readonly _document;
    private readonly _destroy$;
    private readonly _total$;
    /**
     * The total item length.
     */
    set total(value: number);
    /**
     * @ignore
     */
    constructor(_viewport: CdkVirtualScrollViewport, _document: any);
    /**
     * @ignore
     */
    ngOnInit(): void;
    /**
     * @ignore
     */
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiVirtualScrollViewportResizeDirective, [{ self: true; }, null]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UiVirtualScrollViewportResizeDirective, "[uiVirtualScrollViewportResize], ui-virtual-scroll-viewport-resize", never, { "total": "total"; }, {}, never, never, false, never>;
}