import { type ValidatedConfig } from './config.js';
import { type SelectedAttributes, type SemanticTag } from './policy.js';
export declare function isHtmlWhitespace(value: string): boolean;
export declare function splitOutputChunk(value: string, maximum: number): [string, string];
export declare class ReaderFormatter {
    private readonly config;
    private readonly writeOutput;
    private readonly frames;
    private readonly lists;
    private readonly tables;
    private readonly preInitialLineFeeds;
    private pendingWhitespace;
    private pendingBreaks;
    private pendingTab;
    private pendingListPrefix;
    private quoteDepth;
    private suppressedLinkDepth;
    private hasOutput;
    private atLineStart;
    private trailingNewlines;
    private serial;
    constructor(config: ValidatedConfig, writeOutput: (value: string, splittable: boolean) => void);
    text(value: string, mode: 'normal' | 'pre'): void;
    start(tag: SemanticTag, attributes: SelectedAttributes): void;
    end(tag: SemanticTag): void;
    finish(): void;
    private listPrefix;
    private image;
    private appendUrl;
    private boundary;
    private takeSeparator;
    private takePrefixes;
    private emitNormal;
    private emitPre;
    private write;
}