/**
 * Builds a utility grid allowing for easier keyboard-navigation between cells on columns and rows
 */
declare function buildTableGridMap(tableRef: HTMLTableElement): {
    grid: (Element | undefined)[][];
    positions: Map<Element, {
        x: number;
        y: number;
    }>;
};
type GridCache = {
    grid: ReturnType<typeof buildTableGridMap> | null;
    dirty: boolean;
};
/**
 * Pure function that calculates the next grid position given a current position and delta.
 * Returns the position if valid, or null if out of bounds.
 */
declare function getNextGridPosition(grid: (Element | undefined)[][], currentPos: {
    x: number;
    y: number;
}, delta: {
    x: number;
    y: number;
}): {
    x: number;
    y: number;
} | null;
/**
 * Checks if a cell is focusable (contains focusable elements).
 * Type guard that narrows Element | undefined to Element.
 */
declare function isCellFocusable(cell: Element | undefined): cell is Element;
/**
 * Finds the next cell in the given direction, starting from the current position.
 * Skips over cells that are not focusable.
 * Returns null if no next cell is found in the given direction.
 */
declare function findNextFocusableCell(grid: (Element | undefined)[][], currentPos: {
    x: number;
    y: number;
}, delta: {
    x: number;
    y: number;
}, currentCell: Element): Element | null;
/**
 * Finds the first focusable cell in the given row.
 */
declare function findFirstCellInRow(grid: (Element | undefined)[][], rowIndex: number): Element | null;
/**
 * Finds the last focusable cell in the given row.
 */
declare function findLastCellInRow(grid: (Element | undefined)[][], rowIndex: number): Element | null;
/**
 * Finds the first focusable cell in the entire table.
 */
declare function findFirstCell(grid: (Element | undefined)[][]): Element | null;
/**
 * Finds the last focusable cell in the entire table.
 */
declare function findLastCell(grid: (Element | undefined)[][]): Element | null;
export { buildTableGridMap, findFirstCell, findFirstCellInRow, findLastCell, findLastCellInRow, findNextFocusableCell, getNextGridPosition, isCellFocusable, };
export type { GridCache };