import { CellRange } from './Cell';
/** What a merge manager can ask about the grid while deciding a cell's span. */
export interface MergeQuery {
    row: number;
    col: number;
    rowCount: number;
    colCount: number;
    /** The raw value of any cell, for comparing neighbours. */
    value(row: number, col: number): unknown;
    /** Whether a column opts into merging. */
    mergeableCol(col: number): boolean;
}
/**
 * Returns the range a cell belongs to, or null when it stands alone. Return the
 * same range for every cell inside it. Only spans larger than a single cell are
 * meaningful — return null for singletons.
 */
export type MergeManager = (q: MergeQuery) => CellRange | null;
/**
 * The default, content-driven manager: in a mergeable column, a run of adjacent
 * rows with equal values merges into one vertical span.
 */
export declare const contentMerge: MergeManager;