Function extendBoundsWithOHLCDataPoints

src/ChartGPU.ts:243–273

(bounds: Bounds | null, points: ReadonlyArray<OHLCDataPoint>)

};

const extendBoundsWithOHLCDataPoints = (bounds: Bounds | null, points: ReadonlyArray<OHLCDataPoint>): Bounds | null => {
  if (points.length === 0) return bounds;

  let xMin = bounds?.xMin ?? Number.POSITIVE_INFINITY;
  let xMax = bounds?.xMax ?? Number.NEGATIVE_INFINITY;
  let yMin = bounds?.yMin ?? Number.POSITIVE_INFINITY;
  let yMax = bounds?.yMax ?? Number.NEGATIVE_INFINITY;

  for (let i = 0; i < points.length; i++) {
    const p = points[i]!;
    const timestamp = getOHLCTimestamp(p);
    const low = isTupleOHLCDataPoint(p) ? p[3] : p.low;
    const high = isTupleOHLCDataPoint(p) ? p[4] : p.high;

    if (!Number.isFinite(timestamp) || !Number.isFinite(low) || !Number.isFinite(high)) continue;
    if (timestamp < xMin) xMin = timestamp;
    if (timestamp > xMax) xMax = timestamp;
    if (low < yMin) yMin = low;
    if (high > yMax) yMax = high;
  }

  if (!Number.isFinite(xMin) || !Number.isFinite(xMax) || !Number.isFinite(yMin) || !Number.isFinite(yMax)) {
    return bounds;
  }

  // Keep bounds usable for downstream scale derivation.
  if (xMin === xMax) xMax = xMin + 1;
  if (yMin === yMax) yMax = yMin + 1;

  return { xMin, xMax, yMin, yMax };
};

const computeGlobalBounds = (
  series: ResolvedChartGPUOptions['series'],