Kadafi - Usable Item Disable State

#=============================================================================
# Kadafi - Usable Item Disable State
# Version : 1.0
# Contact : http://www.facebook.com/xandalfi
# =============================================================================
($imported ||= {})[:Kadafi_UsableItemDisableState] = true
# =============================================================================
# CHANGE LOGS:
# -----------------------------------------------------------------------------
# 2014.12.20 - Finished script
# =============================================================================
=begin

  Introduction :
  This script allow you to disable the use of UsableItem (item / skill)
  according to the actor state.

  How to Use :
  Notetag at item / skill note box: <disable_state: state_id>

  Terms of Use :
  1. Credit me as Kadafi

=end
# =============================================================================
# Don't edit below this line unless you know what to do.
# =============================================================================
class RPG::UsableItem < RPG::BaseItem
  def disable_state
    return @disable_state if @disable_state
    note[/<disable_state\s*:\s*(\d+)/i]
    @disable_state = $1.to_i
    return @disable_state
  end
end

class Window_BattleItem < Window_ItemList
  def enable?(item)
    !BattleManager.actor.state?(item.disable_state)
  end
end

class Window_SkillList < Window_Selectable
  def enable?(item)
    @actor && @actor.usable?(item) && !BattleManager.actor.state?(item.disable_state)
  end
end