import * as React from 'react';
import type { ImageViewerItem } from './types.js';
import type { ChangeDetails } from '../../contracts/components.js';
export interface ImageViewerContextValue {
    items: ImageViewerItem[];
    index: number;
    current: ImageViewerItem | null;
    open: boolean;
    zoom: number;
    setIndex(i: number, details: ChangeDetails): void;
    next(details: ChangeDetails): void;
    prev(details: ChangeDetails): void;
    setOpen(o: boolean, details: ChangeDetails): void;
    setZoom(z: number): void;
    loop: boolean;
    popupId: string;
    /** REQ-SURF-142: the Trigger that opened the popup; focus returns here on close. */
    triggerRef: React.RefObject<HTMLElement | null>;
    /** REQ-SURF-142: id of the mounted Caption (the popup's aria-labelledby target), else null. */
    captionId: string | null;
    setCaptionId(id: string | null): void;
    /** REQ-SURF-145: true while an Inspector part is mounted (layout reserves its region). */
    hasInspector: boolean;
    setHasInspector(v: boolean): void;
    /** REQ-SURF-145: sample the current image tone onto the Stage. */
    sampleTone: boolean;
}
export declare const ImageViewerContext: React.Context<ImageViewerContextValue | null>;
export declare function useImageViewer(part: string): ImageViewerContextValue;
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