import { ParagraphBlock } from './index.js';
export declare const INLINE_OBJECT_REPLACEMENT_CHARACTER = "\uFFFC";
export type ParagraphVisibleRunSlice = {
    runIndex: number;
    fromChar: number;
    toChar: number;
};
/**
 * Flattens a paragraph into Document API visible-text coordinates.
 *
 * Text is preserved verbatim in UTF-16. Every non-text run contributes one
 * U+FFFC object-replacement character, regardless of its rendered label.
 */
export declare const flattenParagraphVisibleText: (block: ParagraphBlock) => string;
/**
 * Maps a validated visible-text range to slices in the paragraph's run space.
 * Returns null for non-integer, reversed, negative, or out-of-bounds ranges.
 */
export declare const mapVisibleRangeToRunSlices: (block: ParagraphBlock, from: number, to: number) => ParagraphVisibleRunSlice[] | null;