Module: Kramdown::Converter::SyntaxHighlighter::Coderay

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

Overview

Uses Coderay to highlight code blocks and code spans.

Class Method Summary collapse

Class Method Details

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



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

def self.call(converter, text, lang, type, call_opts)
  return nil unless converter.options[:enable_coderay]

  if type == :span && lang
    ::CodeRay.scan(text, lang.to_sym).html(options(converter, :span)).chomp
  elsif type == :block && (lang || options(converter, :default_lang))
    lang ||= call_opts[:default_lang] = options(converter, :default_lang)
    ::CodeRay.scan(text, lang.to_s.gsub(/-/, '_').to_sym).html(options(converter, :block)).chomp << "\n"
  else
    nil
  end
rescue
  converter.warning("There was an error using CodeRay: #{$!.message}")
  nil
end

.options(converter, type) ⇒ Object 



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# File 'lib/kramdown/converter/syntax_highlighter/coderay.rb', line 40

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

.prepare_options(converter) ⇒ Object 



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# File 'lib/kramdown/converter/syntax_highlighter/coderay.rb', line 45

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

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

  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[:default_lang] = converter.options[:coderay_default_lang] || opts.delete(:default_lang)
  cache[:span] = {
    :css => converter.options[:coderay_css]
  }.update(opts).update(span_opts).update(:wrap => :span)
  cache[:block] = {
    :wrap => converter.options[:coderay_wrap],
    :line_numbers => converter.options[:coderay_line_numbers],
    :line_number_start => converter.options[:coderay_line_number_start],
    :tab_width => converter.options[:coderay_tab_width],
    :bold_every => converter.options[:coderay_bold_every],
    :css => converter.options[:coderay_css]
  }.update(opts).update(block_opts)

  [:css, :wrap, :line_numbers].each do |key|
    [:block, :span].each do |type|
      cache[type][key] = cache[type][key].to_sym if cache[type][key].kind_of?(String)
    end
  end
end