import { type ParagraphAlignment, type StylesModel } from './styles.js';
import type { DocumentViewNode, HeaderFormatting, HeadingValue, HeuristicHeadingSource } from './document_view-types.js';
export type { HeaderFormatting, HeadingSource, HeadingValue, HeuristicHeadingSource } from './document_view-types.js';
export declare function extractHeaderInfo(cleanText: string): {
    header_text: string | null;
    header_style: HeuristicHeadingSource | null;
};
export declare function deriveHeading(paragraphStyleId: string | null, cleanText: string, headerText: string | null, headerStyle: HeuristicHeadingSource | null, isInTableCell: boolean): HeadingValue | undefined;
export declare function detectRunInHeader(params: {
    paragraph: Element;
    paragraphPPr: Element | null;
    paragraphStyleId: string | null;
    styles: StylesModel;
}): {
    raw_text: string;
    formatting: HeaderFormatting;
    headerCharCount: number;
} | null;
/**
 * Detect a centered, ALL-CAPS, bold standalone title (e.g. an NVCA SPA's
 * `SERIES […] PREFERRED STOCK PURCHASE AGREEMENT` title).
 *
 * Strict gates only — fires only when the paragraph cannot be confused with
 * body prose, a placeholder, or a signature line:
 *   - paragraph alignment is CENTER
 *   - clean text contains no lowercase letters
 *   - clean text contains ≥ 3 ASCII letters AND ≥ 2 whitespace-separated
 *     word-tokens (so single-token bracketed placeholders like `[COMPANY]`
 *     and underscore-only signature lines like `____________` are rejected)
 *   - clean text is non-empty and ≤ MAX_CENTERED_TITLE_LENGTH
 *   - all visible runs are bold (a single non-bold char disqualifies)
 */
export declare function detectTitleCapsCentered(params: {
    paragraph: Element;
    paragraphPPr: Element | null;
    paragraphStyleId: string | null;
    alignment: ParagraphAlignment;
    cleanTextNoLabel: string;
    styles: StylesModel;
}): {
    raw_text: string;
    formatting: HeaderFormatting;
} | null;
export declare function suppressSignatureClusters(nodes: DocumentViewNode[]): void;
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