import type { ReactiveController, ReactiveControllerHost } from 'lit';
import type { ViewportClientRect } from './viewport-fitting.utils.js';
interface ViewportAutoFitHost extends ReactiveControllerHost, HTMLElement {
    readonly autoFit: boolean;
    readonly hasUpdated: boolean;
}
type ApplyInitialFit = (clientRects: readonly ViewportClientRect[]) => void;
/** Coordinates one initial fit once default-slot children have definitions and measurable layout. */
export declare class ViewportAutoFitController implements ReactiveController {
    #private;
    constructor(host: ViewportAutoFitHost, applyInitialFit: ApplyInitialFit);
    hostConnected(): void;
    hostDisconnected(): void;
    hostUpdated(): void;
    contentChanged: (event: Event) => void;
    consume(): void;
}
export {};