Module: Asciidoctor::PDF::FormattedText::SourceWrap

Defined in:
lib/asciidoctor/pdf/formatted_text/source_wrap.rb

Constant Summary collapse

NoBreakSpace = 
?\u00a0

Instance Method Summary collapse

Instance Method Details

#wrap(array) ⇒ Object

Override Prawn::Text::Formatted::Box#wrap method to add line numbers in source blocks. Note that this implementation assumes that the :single_line option is falsy.



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# File 'lib/asciidoctor/pdf/formatted_text/source_wrap.rb', line 11

def wrap array
  return super unless array[0][:linenum] # sanity check
  initialize_wrap array
  @line_wrap.extend SourceLineWrap
  highlight_line = stop = nil
  unconsumed = @arranger.unconsumed
  until stop
    if (first_fragment = unconsumed[0])[:linenum]
      linenum_text = first_fragment[:text]
      linenum_spacer ||= { text: (NoBreakSpace.encode linenum_text.encoding) + (' ' * (linenum_text.length - 1)), linenum: :spacer }
      highlight_line = (second_fragment = unconsumed[1])[:highlight] ? second_fragment.dup : nil
    else # wrapped line
      first_fragment[:text] = first_fragment[:text].lstrip
      @arranger.unconsumed.unshift highlight_line if highlight_line
      @arranger.unconsumed.unshift linenum_spacer.dup
    end
    @line_wrap.wrap_line \
      document: @document,
      kerning: @kerning,
      width: @width,
      arranger: @arranger,
      disable_wrap_by_char: @disable_wrap_by_char
    if enough_height_for_this_line?
      move_baseline_down
      print_line
      stop = @arranger.finished?
    else
      stop = true
    end
  end
  @text = @printed_lines.join ?\n
  @everything_printed = @arranger.finished?
  @arranger.unconsumed
end