import type { SpanLayout } from "../types.js";
/**
 * Parameters required to calculate viewport bounds for virtualized content
 */
export interface ComputeBoundsArgs {
    /** Width of the visible viewport area in pixels */
    viewportWidth: number;
    /** Height of the visible viewport area in pixels */
    viewportHeight: number;
    /** Current vertical scroll position in pixels */
    scrollTop: number;
    /** Current horizontal scroll position in pixels */
    scrollLeft: number;
    /** Array of cumulative column widths/positions */
    xPositions: Uint32Array;
    /** Array of cumulative row heights/positions */
    yPositions: Uint32Array;
    /** Number of pinned rows at the top */
    topCount: number;
    /** Number of pinned rows at the bottom */
    bottomCount: number;
    /** Number of pinned columns at the start (left) */
    startCount: number;
    /** Number of pinned columns at the end (right) */
    endCount: number;
    /** Number of additional rows to include when determining top bound */
    rowOverscanTop?: number;
    /** Number of additional rows to include when determining bottom bound */
    rowOverscanBottom?: number;
    /** Number of additional columns to include when determining start bound */
    colOverscanStart?: number;
    /** Number of additional columns to include when determining end bound */
    colOverscanEnd?: number;
}
/**
 * Calculates the visible range of rows and columns in a virtualized grid.
 *
 * This function determines which rows and columns should be rendered based on:
 * 1. Current scroll position
 * 2. Viewport dimensions
 * 3. Pinned rows/columns configuration
 * 4. Overscan settings for smoother scrolling
 *
 * The returned bounds include overscan areas (extra rows/columns rendered outside
 * the visible area) to mitigate flickering during scrolling.
 *
 * The bounds returned are of the scrollable rows. The bounds for pinned rows are
 * always visible and do not need to be computed.
 */
export declare function computeBounds({ viewportWidth, viewportHeight, scrollTop, scrollLeft, xPositions, yPositions, topCount, bottomCount, startCount, endCount, rowOverscanTop, rowOverscanBottom, colOverscanStart, colOverscanEnd, }: ComputeBoundsArgs): SpanLayout;