class HpM118dwx4

# File lib/hpm118dwx4.rb, line 12
def initialize(filename='page.html', pg_height: 500, debug: false)

  super(filename, pg_height: pg_height, debug: debug)

end

# File lib/hpm118dwx4.rb, line 20
def build_html(doc, pages)
  
  doc = super(doc, pages)
  
  # add the a, b, c, and d to each page
  a = %w(a b c d).cycle

  puts 'doc.xml: ' + doc.xml.inspect if @debug
  
  doc.root.xpath('//body/div').each do |e|
    e.attributes[:class] = ['page', a.next]
  end
  
  return doc
end

# File lib/hpm118dwx4.rb, line 55
def collate(pages)

  pps = 8 # pages per sheet

  # pages are processed in multiples of 8 (4 pages x 2 sides)
  n = (((pages.length + pps-1) / pps) * pps) - pages.length
  puts 'n: ' + n.inspect if @debug
  blanks = [nil] * n

  r = -2
         
  a = (pages + blanks).length.times.each_slice(pps).flat_map do |x|
         
    x.map.with_index do |y,i|
         
      puts 'r: ' + r.inspect if @debug
      r+= [3, 3, 1, 3, -5, -1, 5, -1][i]
      r
         
    end
  end

  puts ('before zip a:' + a.inspect).debug if @debug       
  puts 'pages:' + pages.join("<br/>\n") if @debug
  puts 'pages:' + pages.inspect if @debug
  a.map {|x| pages[x-1]}.zip(a)

end

# File lib/hpm118dwx4.rb, line 36
  def css()
    
s=<<CSS
    body { font-size: 1.96em;  }
    .a {background-color: #fe2;}
    .b {background-color: #ae2;}
    .c {background-color: #8d2;}
    .d {background-color: #aa2;}
    .c, .d {
      background-color: #a42; margin-top: 3.6em; padding-top: 0em;
  min-height: 88%;
     }
    .b, .d {background-color: #aa2; margin-left: 2.3em;}
    .a, .c {background-color: #aa2; margin-right: 2.1em;}
CSS
    super() + s
    
  end