class TablePrint::Column

def add_formatter(formatter)
  @formatters << formatter
end

def data_width
  if multibyte_count
    [
      name.each_char.collect{|c| c.bytesize == 1 ? 1 : 2}.inject(0, &:+),
      Array(data).compact.collect(&:to_s).collect{|m| m.each_char.collect{|n| n.bytesize == 1 ? 1 : 2}.inject(0, &:+)}.max
    ].compact.max || 0
  else
    [
      name.length,
      Array(data).compact.collect(&:to_s).collect(&:length).max
    ].compact.max || 0
  end
end

def display_method
  @display_method ||= name
end

def display_method=(method)
  method = method.to_s unless method.is_a? Proc
  @display_method = method
end

def formatters=(formatter_list)
  formatter_list.each do |f|
    add_formatter(f)
  end
end

def initialize(attr_hash={})
  @formatters = []
  attr_hash.each do |k, v|
    self.send("#{k}=", v)
  end
end

def max_width
  TablePrint::Config.max_width
end

def multibyte_count
  TablePrint::Config.multibyte
end

def name=(n)
  @name = n.to_s
end

def width
  return fixed_width if fixed_width
  width = [(default_width || max_width), data_width].min
  [(min_width || 0), width].max
end