import { ElementRef, Renderer2 } from '@angular/core';
import { WindowRef } from '../window-ref';
import { DocumentRef } from '../window-ref/document-ref.service';
export declare function centerWindowPosition(elementRef: ElementRef, windowRef: WindowRef): {
    top?: number;
    left?: number;
};
export declare function stopPropagationIfExist($event?: Event): void;
export declare function readFileAsDataURL(file: any): Promise<any>;
export declare function getScrollBarWidth(renderer: Renderer2, documentRef: DocumentRef): number;