[] (PDF::Writer::TagAlink)

          # File lib/pdf/writer.rb, line 2498
    2498:       def [](pdf, info)
    2499:         @style ||= DEFAULT_STYLE.dup
    2500:
    2501:         case info[:status]
    2502:         when :start, :start_line
    2503:             # The beginning of the link. This should contain the URI for the
    2504:             # link as the :params entry, and will also contain the value of
    2505:             # :cbid.
    2506:           @links ||= {}
    2507:
    2508:           @links[info[:cbid]] = {
    2509:             :x         => info[:x],
    2510:             :y         => info[:y],
    2511:             :angle     => info[:angle],
    2512:             :descender => info[:descender],
    2513:             :height    => info[:height],
    2514:             :uri       => info[:params]["uri"]
    2515:           }
    2516:
    2517:           pdf.save_state
    2518:           pdf.fill_color @style[:text_color] if @style[:text_color]
    2519:           if @style[:draw_line]
    2520:             pdf.stroke_color  @style[:color] if @style[:color]
    2521:             sz = info[:height] * @style[:factor]
    2522:             pdf.stroke_style! StrokeStyle.new(sz, @style[:line_style])
    2523:           end
    2524:         when :end, :end_line
    2525:             # The end of the link. Assume that it is the most recent opening
    2526:             # which has closed.
    2527:           start = @links[info[:cbid]]
    2528:             # Add underlining.
    2529:           theta = PDF::Math.deg2rad(start[:angle] - 90.0)
    2530:           if @style[:draw_line]
    2531:             drop  = start[:height] * @style[:factor] * 1.5
    2532:             drop_x = Math.cos(theta) * drop
    2533:             drop_y = -Math.sin(theta) * drop
    2534:             pdf.move_to(start[:x] - drop_x, start[:y] - drop_y)
    2535:             pdf.line_to(info[:x] - drop_x, info[:y] - drop_y).stroke
    2536:           end
    2537:           pdf.add_link(start[:uri], start[:x], start[:y] +
    2538:                        start[:descender], info[:x], start[:y] +
    2539:                        start[:descender] + start[:height])
    2540:           pdf.restore_state
    2541:         end
    2542:       end