import { AfterViewInit, ElementRef, EventEmitter, NgZone, OnChanges, OnDestroy, SimpleChanges } from "@angular/core";
import { IScrollProvider } from "../scroll";
export declare class NStickyBlockDirective implements AfterViewInit, OnChanges, OnDestroy {
    protected zone: NgZone;
    nStickyBlock: "top" | "bottom";
    stickyTopOffset: number;
    stickyBodyInject: boolean;
    stickyDisabled: boolean;
    stickOnRevertScroll: boolean;
    stickChanged: EventEmitter<boolean>;
    readonly element: HTMLElement;
    private elementParent;
    private scrollContainer;
    private lastScrollTop;
    private scrollProvider;
    private placeholder;
    private scrollListener;
    private resizeListener;
    constructor(el: ElementRef, zone: NgZone, scrollProvider: IScrollProvider);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    ngOnChanges(changes: SimpleChanges): void;
    onResize(): void;
    onScroll(): void;
    update(): void;
    protected link(): void;
    protected unlink(): void;
    protected destroy(): void;
    stick(width: number, height: number, left: number, unhide?: boolean): void;
    unStick(): void;
    private clear;
}