/**
 * Interior row boundary coverage for the single-owner border model.
 *
 * Word paints the horizontal boundary between two rows as ONE continuous line across the
 * UNION of both rows' cell extents (verified with 300dpi probes: when one row is narrower,
 * e.g. via `w:gridBefore`/`w:gridAfter`, the uncovered slivers still render, and with the
 * table's insideH border). In this painter each cell in the row BELOW owns and paints its
 * top across its own span, so boundary segments that have a cell ABOVE but none BELOW are
 * painted by nobody. These helpers identify exactly those segments so the fragment renderer
 * can close them with positioned strips, without ever doubling a line that a cell below
 * already paints. (SD-3028 / SD-1513)
 */
/** Identifies a measured cell by the row it STARTS in and its index within that row. */
export interface BoundaryCellRef {
    rowIndex: number;
    cellIndex: number;
}
interface MeasuredCellLike {
    gridColumnStart?: number;
    colSpan?: number;
    rowSpan?: number;
}
interface MeasuredRowLike {
    cells?: readonly MeasuredCellLike[] | null;
}
/**
 * Builds the per-row grid column occupancy map, including columns covered by cells that
 * span into a row via rowspan (`w:vMerge`). `occupancy[r][c]` is the cell covering grid
 * column `c` on row `r`, or null when no cell covers it (a gridBefore/gridAfter region).
 */
export declare const buildColumnOccupancy: (rows: ReadonlyArray<MeasuredRowLike | undefined | null>, numCols: number) => (BoundaryCellRef | null)[][];
/** A run of grid columns on a row boundary covered above but not below. */
export interface BoundaryGapSegment {
    startCol: number;
    endColExclusive: number;
    /** The cell whose bottom edge forms this segment (its borders resolve the strip). */
    aboveCell: BoundaryCellRef;
}
/**
 * Segments of the boundary ABOVE `belowRowIndex` where a cell ends from above but no cell
 * exists below. A rowspan cell crossing the boundary occupies both sides with the same ref,
 * so it never produces a segment (there is no edge inside a vertical merge). Contiguous
 * columns sharing the same above cell merge into one segment.
 */
export declare const computeBoundaryGapSegments: (occupancy: ReadonlyArray<ReadonlyArray<BoundaryCellRef | null>>, belowRowIndex: number) => BoundaryGapSegment[];
export {};
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