class Rouge::Formatters::HTMLLinewise

def initialize(formatter, opts={})
  @formatter = HTML.assert_html_formatter!(formatter)
  @tag_name = opts.fetch(:tag_name, 'div')
  @class_format = opts.fetch(:class, 'line-%i')
end

def stream(tokens, &b)
  token_lines(tokens).with_index(1) do |line_tokens, lineno|
    yield %(<#{@tag_name} class="#{sprintf @class_format, lineno}">)
    line_tokens.each do |tok, val|
      yield @formatter.span(tok, val)
    end
    yield %(\n</#{@tag_name}>)
  end
end