/**
 * 行取り (gyōdori, JLReq §2.2.5 a, §4.1.6): a heading that takes a whole
 * number of lines of the body grid, its text centred in them. "3行取り" is
 * a heading set in the room of three body lines: three characters of the
 * body size and the two line gaps between them, the heading's characters
 * centred across that band (`HeadingLevelConfig.lineSpan`).
 */
/** The band a heading of `lineCount` lines takes (px along the block
 *  axis), and how far below the band's top its first line box goes. */
export interface LineSpanBand {
    /** Body lines the band takes: the heading's `lineSpan`, or more when its
     *  lines need more room (the next whole number of lines). */
    lines: number;
    /** `lines` × the body line pitch. */
    height: number;
    /** Offset of the heading's first line box from the band's top. */
    shift: number;
}
/**
 * The band of a 行取り heading: `span` body lines of `pitchPx` (more when
 * the heading's `lineCount` lines of `lineHeightPx` need them), with the
 * heading's characters centred across it. Centred means the middle of the
 * heading's characters (first line to last) meets the middle of the body
 * characters the band would hold (first line to last), so the heading sits
 * in the band as JLReq measures it, from the top of the first body
 * character to the foot of the last, not in its line boxes. The first line
 * box stays inside the band.
 */
export declare function headingLineSpanBand(span: number, lineCount: number, lineHeightPx: number, heading: {
    font: string;
    sizePx: number;
}, body: {
    font: string;
    sizePx: number;
}, pitchPx: number): LineSpanBand;
//# sourceMappingURL=lineSpan.d.ts.map