import { Root } from 'xast';
import { Plugin } from 'unified';
export interface FormatOptions {
    breakLines?: "few" | "some" | "many";
    breakSentences?: boolean;
    /** Wrap long block start-tag attributes onto separate lines. */
    breakLongAttributes?: boolean;
    insertSpaces?: boolean;
    tabSize?: number;
    /** Target line width for paragraph text reflow. 0 = no width limit. Default 80. */
    printWidth?: number;
}
/**
 * Serialize an already-parsed xast Root tree to formatted PreTeXt XML.
 *
 * Pipeline: each node is dispatched to a category-specific appender that pushes
 * indented lines into an array, then applyBlankLines inserts blank separators as
 * a post-processing pass, and the array is joined with newlines.
 */
export declare function serializeXast(tree: Root, options?: FormatOptions): string;
/** Unified compiler plugin: formats the xast tree produced by the pipeline. */
export declare const pretextFormatPlugin: Plugin<[FormatOptions?], Root, string>;
/** Main entry point for formatting PreTeXt XML strings. */
export declare function formatPretext(text: string, options?: FormatOptions): string;