import { type RefObject } from 'react';
/**
 * Hook to return a middle-truncated string that fits within the available width of the span's container.
 * Truncation respects grapheme cluster boundaries when possible (via Intl.Segmenter),
 * and falls back to iterating over code points where Segmenter is not available.
 *
 * The available width is computed as parentElement.offsetWidth - subtractWidth.
 * Measurement is done by creating an offscreen span copying relevant computed font styles
 * from the referenced span to ensure accurate width measurement.
 *
 * @param text - The text to truncate.
 *
 * @param ref - The ref to the span element.
 *
 * @param subtractWidth - The width to subtract from the available width.
 *
 * @param ellipsis - The ellipsis to use when truncating.
 *
 * @returns The truncated text.
 */
export declare const useMiddleTruncatedText: (text: string, ref: RefObject<HTMLSpanElement | null>, subtractWidth?: number, ellipsis?: string) => string;