import { AfterContentInit, ElementRef, OnDestroy, OnInit, QueryList, Renderer2 } from '@angular/core';
import { Subscription } from 'rxjs';
import { LzyLoadItemDirective } from '../../directives/lzy-load-item.directive';
import { Settings } from '../../models/settings';
export declare class LzyLoadContComponent implements OnInit, AfterContentInit, OnDestroy {
    private renderer;
    private hostElement;
    private observer;
    private IOOptions;
    private init;
    private loadingRangeAmount;
    private preloadAmo;
    private scrollEvent;
    private onResizeEvent;
    private numOfVisiElem;
    private loadedRange;
    settings: Settings;
    container: HTMLElement;
    subscription: Subscription;
    itemsIO: QueryList<LzyLoadItemDirective>;
    constructor(renderer: Renderer2, hostElement: ElementRef);
    ngOnInit(): void;
    private registerIO;
    private initScroll;
    private initScreenResizing;
    initialize(): void;
    resetAndRecalculateSettings(): void;
    ngAfterContentInit(): void;
    private calSettings;
    private inLoadingRange;
    private outOfLoadingRange;
    private getVisibleItems;
    private initializeIntersectionObs;
    calLoadedRange(visibleItems: LzyLoadItemDirective[]): number[];
    updateLoadedElements(): void;
    onResize(): void;
    ngOnDestroy(): void;
}