require 'patchmaster/curses/pm_window'

module PM
class ListWindow < PmWindow

  attr_reader :list

  def initialize(rows, cols, row, col, title_prefix)
    super
    @offset = 0
  end

 # +curr_item_method_sym+ is a method symbol that is sent to
  # PM::PatchMaster to obtain the current item so we can highlight it.
  def set_contents(title, list, curr_item_method_sym)
    @title, @list, @curr_item_method_sym = title, list, curr_item_method_sym
    draw
  end

  def draw
    super
    return unless @list

    curr_item = PM::PatchMaster.instance.send(@curr_item_method_sym)
    return unless curr_item

    curr_index = @list.index(curr_item)
    if curr_index < @offset
      @offset = curr_index
    elsif curr_index >= @offset + visible_height
      @offset = curr_index - visible_height + 1
    end

    @list[@offset, visible_height].each_with_index do |thing, i|
      @win.setpos(i+1, 1)
      @win.attron(A_REVERSE) if thing == curr_item
      @win.addstr(make_fit(" #{thing.name} "))
      @win.attroff(A_REVERSE) if thing == curr_item
    end
  end

end
end