import { Marked } from 'marked';
import { StreamBlock } from './types';
export interface BlockStreamOptions {
    marked: Marked;
    /**
     * Applied to every markup block's HTML before it is cached, so cached HTML
     * is always safe to hand to `v-html`. Identity when omitted. Swap by
     * calling `reset()` and re-updating — the stream never re-runs it on
     * blocks it considers stable.
     */
    sanitize?: (html: string) => string;
}
export interface BlockStream {
    /** Feeds the full accumulated content and returns the renderable blocks. */
    update: (content: string) => StreamBlock[];
    /** Drops all cached state; the next update recomputes every block. */
    reset: () => void;
}
/**
 * Incremental block renderer for a growing markdown document.
 *
 * Comparison-driven rather than assumption-driven: every update re-lexes the
 * full content (cheap, token-only) and keeps the longest prefix of blocks
 * whose `raw` is unchanged — parse and sanitize run only on what actually
 * changed. Markdown constructs that rewrite earlier text (setext headings,
 * list continuation) break the prefix at the rewrite point and re-render
 * exactly the affected blocks.
 */
export declare function createBlockStream(options: BlockStreamOptions): BlockStream;