import HeaderObject, { Accessor } from "../types/HeaderObject";
/**
 * Find all leaf headers (headers without children) in a header tree
 * Takes collapsed state into account - when a header is collapsed, only returns
 * children that are visible when parent is collapsed (showWhen is 'parentCollapsed' or 'always')
 */
export declare const findLeafHeaders: (header: HeaderObject, collapsedHeaders?: Set<Accessor>) => HeaderObject[];
/** Default pixel width for 1fr when converting before container width is known */
export declare const DEFAULT_FR_PX = 150;
/** Default total table width used when normalizing fr/% if container width unknown */
export declare const DEFAULT_TABLE_WIDTH = 800;
/**
 * Normalize header widths so that fr and % are converted to pixels.
 * Call this as soon as headers are received so the rest of the code can assume numeric widths.
 * If totalWidth is not provided, a reasonable total is computed from fixed widths + default for fr columns.
 * If options.containerWidth is provided, all fr/% columns are resolved against the full container width,
 * so pinned and non-pinned fr columns share the same proportional pool.
 */
export declare function normalizeHeaderWidths(headers: HeaderObject[], totalWidthOrOptions?: number | {
    containerWidth: number;
}): HeaderObject[];
/**
 * Get actual width of a header in pixels
 */
export declare const getHeaderWidthInPixels: (header: HeaderObject) => number;
/**
 * Convert fractional widths to pixel values
 */
export declare const removeAllFractionalWidths: (header: HeaderObject) => void;
/**
 * Calculate the minimum width for a header
 */
export declare const getHeaderMinWidth: (header: HeaderObject) => number;
/**
 * Get all visible leaf headers from an array of headers
 */
export declare const getAllVisibleLeafHeaders: (headers: HeaderObject[], collapsedHeaders?: Set<Accessor>) => HeaderObject[];
/**
 * Convert pixel-based widths to proportional fr units
 * This is used when autoExpandColumns is enabled
 */
export declare const convertPixelWidthsToFr: (headers: HeaderObject[], collapsedHeaders?: Set<Accessor>) => HeaderObject[];
/**
 * Calculate the optimal width for a column by measuring both header and cell content
 * This is used for auto-sizing columns to fit their content (like Excel/Google Sheets)
 *
 * @param accessor - The accessor of the header to measure
 * @param options - Configuration options
 * @returns The optimal width in pixels
 */
export declare const calculateHeaderContentWidth: (accessor: Accessor, options?: {
    rows?: any[];
    header?: HeaderObject;
    maxWidth?: number;
    sampleSize?: number;
    /** Scope `.st-cell-content` font/padding sampling to this table instance */
    styleRoot?: ParentNode | null;
}) => number;