import { Text } from "../../doc/src";
import { HeightMap } from "./heightmap";
export declare class ViewportState {
    top: number;
    bottom: number;
    updateFromDOM(dom: HTMLElement, paddingTop: number): number;
    coverEverything(): void;
    getViewport(doc: Text, heightMap: HeightMap, bias: number, scrollTo: number): Viewport;
    coveredBy(doc: Text, viewport: Viewport, heightMap: HeightMap, bias?: number): boolean;
}
export declare class Viewport {
    readonly from: number;
    readonly to: number;
    constructor(from: number, to: number);
    clip(pos: number): number;
    static empty: Viewport;
}