import { OnChanges, SimpleChanges, AfterViewInit, OnDestroy } from '@angular/core';
import { SafeResourceUrl, DomSanitizer } from '@angular/platform-browser';
import * as i0 from "@angular/core";
export declare class PdfViewerComponent implements OnChanges, AfterViewInit, OnDestroy {
    private sanitizer;
    /** pdf文件地址 */
    ncUrl: string;
    viewerUrl: SafeResourceUrl;
    objectUrl: SafeResourceUrl;
    useIframe: boolean;
    private messageListener;
    private errorSubject;
    constructor(sanitizer: DomSanitizer);
    ngOnChanges(changes: SimpleChanges): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    private updateViewerUrls;
    private switchToObjectMode;
    static ɵfac: i0.ɵɵFactoryDeclaration<PdfViewerComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<PdfViewerComponent, "nc-pdf-viewer", never, { "ncUrl": "ncUrl"; }, {}, never, never>;
}