import { ElementRef, EventEmitter, OnDestroy, AfterViewInit, QueryList } from '@angular/core';
import { NbLayoutScrollService } from '../../services/scroll.service';
import { NbLayoutRulerService } from '../../services/ruler.service';
import { NbListItemComponent } from './list.component';
export declare class NbScrollableContainerDimentions {
    scrollTop: number;
    scrollHeight: number;
    clientHeight: number;
}
/**
 * Infinite List Directive
 *
 * ```html
 *  <nb-list nbInfiniteList [threshold]="500" (bottomThreshold)="loadNext()">
 *    <nb-list-item *ngFor="let item of items"></nb-list-item>
 *  </nb-list>
 * ```
 *
 * @stacked-example(Simple infinite list, infinite-list/infinite-list-showcase.component)
 *
 * Directive will notify when list scrolled up or down to a given threshold.
 * By default it listen to scroll of list on which applied, but also can be set to listen to window scroll.
 *
 * @stacked-example(Scroll modes, infinite-list/infinite-list-scroll-modes.component)
 *
 * To improve UX of infinite lists, it's better to keep current page in url,
 * so user able to return to the last viewed page or to share a link to this page.
 * `nbListPageTracker` directive will help you to know, what page user currently viewing.
 * Just put it on a list, set page size and it will calculate page that currently in viewport.
 * You can [open the example](example/infinite-list/infinite-news-list.component)
 * in a new tab to check out this feature.
 *
 * @stacked-example(Infinite list with pager, infinite-list/infinite-news-list.component)
 *
 * @stacked-example(Infinite list with placeholders at the top, infinite-list/infinite-list-placeholders.component)
 *
 */
export declare class NbInfiniteListDirective implements AfterViewInit, OnDestroy {
    private elementRef;
    private scrollService;
    private dimensionsService;
    private alive;
    private lastScrollPosition;
    windowScroll: boolean;
    private readonly elementScroll;
    /**
     * Threshold after which event load more event will be emited.
     * In pixels.
     */
    threshold: number;
    /**
     * By default component observes list scroll position.
     * If set to `true`, component will observe position of page scroll instead.
     */
    listenWindowScroll: any;
    /**
     * Emits when distance between list bottom and current scroll position is less than threshold.
     */
    bottomThreshold: EventEmitter<{}>;
    /**
     * Emits when distance between list top and current scroll position is less than threshold.
     */
    topThreshold: EventEmitter<{}>;
    onElementScroll(): void;
    listItems: QueryList<NbListItemComponent>;
    constructor(elementRef: ElementRef, scrollService: NbLayoutScrollService, dimensionsService: NbLayoutRulerService);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    checkPosition({ scrollHeight, scrollTop, clientHeight }: NbScrollableContainerDimentions): void;
    private getContainerDimensions;
    private inSyncWithDom;
}