import { RichTextRun } from './richText';
export declare const richTextLength: (runs: RichTextRun[]) => number;
/** Internal layout-driven pagination. Never discard whitespace, markup runs or Unicode characters. */
export declare function paginateMeasured(runs: RichTextRun[], fits: (runs: RichTextRun[]) => boolean): RichTextRun[][];
/** Measure using the actual rendered typography, including each Markdown span. */
export declare function measureRichText(runs: RichTextRun[], content: HTMLElement, maxTextHeight?: number): RichTextRun[][] | null;
/** Map an absolute read position to a new layout without skipping unread text. */
export declare function locateReadPosition(pages: RichTextRun[][], position: number): {
    index: number;
    resume: number;
};