#==============================================================================
# Pixel Offset
#   by IMP1
#------------------------------------------------------------------------------
# This script allows events' locations on screen to be offset.
#
#   Usage:
# In an event, create a new comment.
# Add either of the following:
#   MOVE 0, 0
#   OFFSET 0, 0
# Change the first 0 to the number, in pixels, that you want the event to be 
# moved horizontally, and the second 0 to the vertical offset. If you use MOVE,
# it will move the event for that specific page, and if you use OFFSET, it will
# offset the event for all pages. When combining OFFSET and MOVE, MOVE will
# take priorty.
#
#------------------------------------------------------------------------------
#   Compatability:
#
# Aliased Methods:
#   Game_Event.refresh
#   Sprite_Character.update
#
# New Methods/Fields:
#   imp1_pixel_offset
#
# Overwritten Methods:
#   none.
#
#------------------------------------------------------------------------------
#   Version History:
# v1.0 [2014/05/31] : Initial release.
# v1.1 [2014/06/01] : Fixed Erase Event crashing game.
#==============================================================================

module IMP1_Pixel_Offset
#------------------------------------------------------------------------------
# CONFIGURATION BEGIN:
#------------------------------------------------------------------------------

  # This is the text affecting all pages of an event
  ALL_PAGES = "OFFSET"
  # This is the text affecting a specific page of an event
  THIS_PAGE = "MOVE"

#------------------------------------------------------------------------------ 
# CONFIGURATION END:
#------------------------------------------------------------------------------ 
end # IMP1_Pixel_Offset

#==============================================================================
# Game_Event
#   Read comments for MOVE or OFFSET, extract the offset numbers, and save in 
#   the new variable 'imp1_pixel_offset'.
#==============================================================================
class Game_Event
  #--------------------------------------------------------------------------
  # Creates offset field
  #--------------------------------------------------------------------------
  attr_reader :imp1_pixel_offset
  #--------------------------------------------------------------------------
  # Checks for comments, and adds offsets.
  #--------------------------------------------------------------------------
  alias imp_offset_refresh refresh unless $@
  def refresh(*args)
    imp_offset_refresh(*args)
    @imp1_pixel_offset = [0, 0]
    for i in 0...@event.pages.length
      next if @event.pages[i].nil?
      page_list = @event.pages[i].list
      if !page_list.nil?
        for i in 0...page_list.size
          next if page_list[i].code != 108
          text = page_list[i].parameters[0].clone
          if text.gsub!(/\s*#{IMP1_Pixel_Offset::ALL_PAGES}\s*/, '')
            offset = text.split(',')
            @imp1_pixel_offset[0] = offset[0].to_i
            @imp1_pixel_offset[1] = offset[1].to_i
          end
        end
      end
    end
    if !@page.nil? && !@page.list.nil?
      for i in 0...@page.list.size
        next if @page.list[i].code != 108
        text = @page.list[i].parameters[0].clone
        if text.gsub!(/\s*#{IMP1_Pixel_Offset::THIS_PAGE}\s*/, '')
          offset = text.split(',')
          @imp1_pixel_offset[0] = offset[0].to_i
          @imp1_pixel_offset[1] = offset[1].to_i
        end
      end
    end
  end
  
end # Game_Event

#==============================================================================
# Sprite_Character
#   Access event's offset and incrememnt self.x by that amount.
#==============================================================================
class Sprite_Character < Sprite_Base
  #--------------------------------------------------------------------------
  # Adds offsets to events.
  #--------------------------------------------------------------------------
  alias imp_offset_update update unless $@
  def update(*args)
    imp_offset_update(*args)
    if @character.is_a?(Game_Event)
      self.x += @character.imp1_pixel_offset[0]
      self.y += @character.imp1_pixel_offset[1]
    end
  end
  
end # Sprite_Character