isLineEdge method

bool isLineEdge()

This edge is a line edge if

• at least one of the labels is a line label
• any labels which are not line labels have all Locations = EXTERIOR

Implementation

bool isLineEdge() {
  bool isLine = label!.isLine(0) || label!.isLine(1);
  bool isExteriorIfArea0 = !label!.isAreaWithIndex(0) ||
      label!.allPositionsEqual(0, Location.EXTERIOR);
  bool isExteriorIfArea1 = !label!.isAreaWithIndex(1) ||
      label!.allPositionsEqual(1, Location.EXTERIOR);

  return isLine && isExteriorIfArea0 && isExteriorIfArea1;
}