Function comparePosition

packages/designer/src/document/node/node.ts:1454–1479

(node1: INode, node2: INode)

  TheSame = 0,
}
export function comparePosition(node1: INode, node2: INode): PositionNO {
  if (node1 === node2) {
    return PositionNO.TheSame;
  }
  const l1 = node1.zLevel;
  const l2 = node2.zLevel;
  if (l1 === l2) {
    return PositionNO.BeforeOrAfter;
  }

  let p: any;
  if (l1 < l2) {
    p = getZLevelTop(node2, l1);
    if (p && p === node1) {
      return PositionNO.Contains;
    }
    return PositionNO.BeforeOrAfter;
  }

  p = getZLevelTop(node1, l2);
  if (p && p === node2) {
    return PositionNO.ContainedBy;
  }

  return PositionNO.BeforeOrAfter;
}

export function insertChild(
  container: INode,