module HeadMusic::Style::Annotations
end

class HeadMusic::Style::Annotations::StepToFinalNote < HeadMusic::Style::Annotation
  MESSAGE = 'Step to the final note.'

  def marks
    HeadMusic::Style::Mark.for_all(notes[-2..-1]) unless step_to_final_note?
  end

  private

  def step_to_final_note?
    last_melodic_interval && last_melodic_interval.step?
  end

  def last_melodic_interval
    @last_melodic_interval ||= melodic_intervals.last
  end
end