class RPG::UsableItem
  def shape_shift
    note =~ /<シェイプシフト\s*(\d+)*>/ ? ($1 ? $1.to_i : 0) : nil
  end
end

class RPG::State
  def undo_by_remove
    note =~ /<シェイプシフト>/ ? true : false
  end
end

class Game_Battler
  def backup_graphic_for_shape_shift
    if actor?
      @pre_graph_data = [character_name, character_index, face_name, face_index]
    else
      @pre_graph_data = [battler_name, battler_hue]
    end
  end
  def return_graphic_for_shape_shift
    if actor?
      set_graphic(@pre_graph_data[0], @pre_graph_data[1], @pre_graph_data[2], 
      @pre_graph_data[3])
    else
      @battler_name = @pre_graph_data[0]; @battler_hue = @pre_graph_data[1]
    end
  end
  #--------------------------------------------------------------------------
  # ● ステートの解除
  #--------------------------------------------------------------------------
  alias fai_remove_state_n03 remove_state
  def remove_state(state_id)
    fai_remove_state_n03(state_id)
    return_graphic_for_shape_shift if $data_states[state_id].undo_by_remove
  end
  #--------------------------------------------------------------------------
  # ● スキル／アイテムの使用者側への効果
  #--------------------------------------------------------------------------
  alias fai_item_user_effect_n03 item_user_effect
  def item_user_effect(user, item)
    fai_item_user_effect_n03(user, item)
    if item.shape_shift
      character_name = actor? ? self.character_name : @battler_name
      character_index = actor? ? self.character_index : 0
      character_hue = actor? ? 0 : @battler_hue
      user.backup_graphic_for_shape_shift
      if user.actor?
        face_name = user.face_name; face_index = user.face_index
        user.set_graphic(character_name, character_index, face_name, face_index)
      else
        user.graphics_change(character_name)
        user.instance_variable_set(:@battler_hue, character_hue)
      end
      user.add_state(item.shape_shift)
    end
  end
end