class Rouge::Formatters::HTMLLineHighlighter

# File lib/rouge/formatters/html_line_highlighter.rb, line 13
def initialize(delegate, opts = {})
  @delegate = HTML.assert_html_formatter!(delegate)
  @highlight_line_class = opts.fetch(:highlight_line_class, 'hll')
  @highlight_lines = opts[:highlight_lines] || []
end

# File lib/rouge/formatters/html_line_highlighter.rb, line 19
def stream(tokens)
  token_lines(tokens).with_index(1) do |line_tokens, lineno|
    should_highlight = @highlight_lines.include?(lineno)
    yield %(<span class=#{@highlight_line_class.inspect}>) if should_highlight
    line_tokens.each { |tok, val| yield @delegate.span(tok, val) }
    yield "\n"
    yield %(</span>) if should_highlight
  end
end