Simple Hp / Mp Recovery Rate

# // Simple Hp / Mp Recovery Rate by IceDragon
# // Simply put <hp_rate: +/-n> or <mp_rate: +/-n> in a skill's notebox
# // EG.
# //   <hp_rate: +50> # Recover 50%
# //   <hp_rate: -50> # Lose 50%
class RPG::Skill

  def hp_rate()
    @hp_rate ||= self.note =~ /<hp_rate:[ ]([\+\-]?\d+)>/i ? $1.to_i : 0
    return @hp_rate
  end

  def mp_rate
    @mp_rate ||= self.note =~ /<mp_rate:[ ]([\+\-]?\d+)>/i ? $1.to_i : 0
    return @mp_rate
  end

end

class Game_Battler

  alias :perc_rec_skill_effect :skill_effect unless $@
  def skill_effect( user, obj )
    perc_rec_skill_effect( user, obj )
    return if @skipped || @missed || @evaded
    if obj.hp_rate != 0
      old_hp = self.hp
      self.hp += self.maxhp * obj.hp_rate / 100
      @hp_damage -= self.hp - old_hp
    end
    if obj.mp_rate != 0
      old_mp = self.mp
      self.mp += self.maxmp * obj.mp_rate / 100
      @mp_damage -= self.mp - old_mp
    end
  end

end