#==============================================================================
# ■ XP-RGSS-11-opt 武器属性スキル制限 [Ver.1.0.0]       by Claimh
#------------------------------------------------------------------------------
# ・武器属性にない属性のスキルを使用できないようにします
#==============================================================================

module SysUpdate
  # 武器属性によってスキル使用可否を制限する属性
  RESTRICATION_ELE = [SWORD, LANCE, AX, BOW, GUN, WAND]
  
  #--------------------------------------------------------------------------
  # ● スキルの属性制限判定
  #     actor : アクター(Game_Actor)
  #     skill : スキル(RPG::Skill)
  #--------------------------------------------------------------------------
  def self.restrication?(actor, skill)
    return false if skill.nil?
    restrication_elements = []
    for ele in RESTRICATION_ELE
      if skill.element_set.include?(ele)
        restrication_elements.push(ele) # 制限対象の属性
      end
    end
    restrication = false
    if !restrication_elements.empty? # 制限あり
      for ele in restrication_elements
        unless actor.element_set.include?(ele)
          restrication = true  # 制限対象の属性がない
          break
        end
      end
    end
    return restrication
  end
end

class Game_Actor < Game_Battler
  #--------------------------------------------------------------------------
  # ● スキルの使用可能判定
  #     skill_id : スキル ID
  #--------------------------------------------------------------------------
  alias restrication_skill_can_use? skill_can_use?
  def skill_can_use?(skill_id)
    return false if SysUpdate.restrication?(self, $data_skills[skill_id]) # 制限あり
    return restrication_skill_can_use?(skill_id)
  end
end

#==============================================================================
# ■ Window_Skill
#==============================================================================
class Window_Skill < Window_Selectable
  #--------------------------------------------------------------------------
  # ● リフレッシュ <再定義>
  #--------------------------------------------------------------------------
  def refresh
    if self.contents != nil
      self.contents.dispose
      self.contents = nil
    end
    @data = []
    restrication_skills = []
    for i in 0...@actor.skills.size
      skill = $data_skills[@actor.skills[i]]
      next if skill == nil
      if SysUpdate.restrication?(@actor, skill) # 制限あり
        restrication_skills.push(skill)
      else
        @data.push(skill) # 制限なし
      end
    end
    @data += restrication_skills # 制限されたスキルは最後尾に
    # 項目数が 0 でなければビットマップを作成し、全項目を描画
    @item_max = @data.size
    if @item_max > 0
      self.contents = Bitmap.new(width - 32, row_max * 32)
      for i in 0...@item_max
        draw_item(i)
      end
    end
  end
end