export function layoutStack()

in fuse-ui-fabric/splittable/splittable.tsx [18:32]

• 13 lines of code
• 5 McCabe index (conditional complexity)

export function layoutStack(max: number, parts: number[], index: number, delta: number): number[] {
  const total = parts.reduce((s, c) => s + c, 0);
  const unassignedCount = parts.reduce((s, c) => c ? s : s + 1, 0);
  const unassignedAmount = Math.round(max - total) / unassignedCount;
  const cur = parts.map(x => x || unassignedAmount);

  if (delta) {
    const prev = cur[index];
    const next = cur[index + 1];
    const effectiveDelta = delta > 0 ? Math.min(next, delta) : Math.max(-prev, delta);
    cur.splice(index, 2, prev + effectiveDelta, next - effectiveDelta);
  }

  return cur;
}