---

private getHalfBarSpacing(): number {
  const data = this.series.data() as readonly { time: Time }[];

  if (data.length < 2) {
    return 0;
  }

  const lastPoint = data[data.length - 1];
  const previousPoint = data[data.length - 2];

  const lastX = getXCoordinateFromTime(this.chart, lastPoint.time, this.series);
  const previousX = getXCoordinateFromTime(this.chart, previousPoint.time, this.series);

  if (lastX === null || previousX === null) {
    return 0;
  }

  const spacing = Math.abs(Number(lastX) - Number(previousX));

  if (!Number.isFinite(spacing)) {
    return 0;
  }

  return spacing / 2;
}





private getGeometry(): RectangleGeometry | null {
  if (this.startTime === null || this.endTime === null || this.startPrice === null || this.endPrice === null) {
    return null;
  }

  const startX = getXCoordinateFromTime(this.chart, this.startTime, this.series);
  const endX = getXCoordinateFromTime(this.chart, this.endTime, this.series);
  const startY = getYCoordinateFromPrice(this.series, this.startPrice);
  const endY = getYCoordinateFromPrice(this.series, this.endPrice);

  if (startX === null || endX === null || startY === null || endY === null) {
    return null;
  }

  const rawLeft = Math.min(Number(startX), Number(endX));
  const rawRight = Math.max(Number(startX), Number(endX));
  const halfBarSpacing = this.getHalfBarSpacing();

  const left = Math.round(rawLeft - halfBarSpacing);
  const right = Math.round(rawRight + halfBarSpacing);
  const top = Math.round(Math.min(Number(startY), Number(endY)));
  const bottom = Math.round(Math.max(Number(startY), Number(endY)));

  const centerX = (left + right) / 2;
  const centerY = (top + bottom) / 2;

  return {
    left,
    right,
    top,
    bottom,
    width: right - left,
    height: bottom - top,
    handles: {
      nw: { x: left, y: top },
      n: { x: centerX, y: top },
      ne: { x: right, y: top },
      e: { x: right, y: centerY },
      se: { x: right, y: bottom },
      s: { x: centerX, y: bottom },
      sw: { x: left, y: bottom },
      w: { x: left, y: centerY },
    },
  };
}