Module: Kramdown::Converter::SyntaxHighlighter::Rouge

Defined in:
lib/kramdown/converter/syntax_highlighter/rouge.rb

Overview

Uses Rouge which is CSS-compatible to Pygments to highlight code blocks and code spans.

Class Method Summary collapse

Class Method Details

.call(converter, text, lang, type, _unused_opts) ⇒ Object 



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# File 'lib/kramdown/converter/syntax_highlighter/rouge.rb', line 24

def self.call(converter, text, lang, type, _unused_opts)
  opts = options(converter, type)
  lexer = ::Rouge::Lexer.find_fancy(lang || opts[:default_lang], text)
  return nil if opts[:disable] || !lexer

  formatter = (opts.delete(:formatter) || ::Rouge::Formatters::HTML).new(opts)
  formatter.format(lexer.lex(text))
end

.options(converter, type) ⇒ Object 



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# File 'lib/kramdown/converter/syntax_highlighter/rouge.rb', line 33

def self.options(converter, type)
  prepare_options(converter)
  converter.data[:syntax_highlighter_rouge][type]
end

.prepare_options(converter) ⇒ Object 



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# File 'lib/kramdown/converter/syntax_highlighter/rouge.rb', line 38

def self.prepare_options(converter)
  return if converter.data.key?(:syntax_highlighter_rouge)

  cache = converter.data[:syntax_highlighter_rouge] = {}

  opts = converter.options[:syntax_highlighter_opts].dup
  span_opts = (opts.delete(:span) || {}).dup
  block_opts = (opts.delete(:block) || {}).dup
  [span_opts, block_opts].each do |hash|
    hash.keys.each do |k|
      hash[k.kind_of?(String) ? Kramdown::Options.str_to_sym(k) : k] = hash.delete(k)
    end
  end

  cache[:span] = opts.merge(span_opts).update(:wrap => false)
  cache[:block] = opts.merge(block_opts)
end