Module: MiniSyntax::Highlighter::Ruby

Defined in:
lib/minisyntax/highlighter/ruby.rb

Class Method Summary collapse

Class Method Details

.highlight(code) ⇒ Object 



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# File 'lib/minisyntax/highlighter/ruby.rb', line 4

def self.highlight(code)
  keywords = %w(BEGIN begin case class else elsif END end ensure for if in module rescue then unless until when while)
  keywords += %w(def do and not or require)
  keywords += %w(alias alias_method break next redo retry return super undef yield)
  keywords += %w(initialize new loop include extend raise attr_reader attr_writer attr_accessor attr catch throw private module_function public protected)
  code.gsub! /\b(#{keywords.join('|')})\b(?!\?)/, "<em>\\1</em>"
  code.gsub! /\b([A-Z_][a-zA-Z0-9_]+)\b/, "<b>\\1</b>"
  code.gsub! /(\#([^\{].*?)?)\n/, "<i>\\1</i>\n"
  code.gsub! /("(.*?)"|'.*?'|%[qrw]\(.*?\)|%([QRW])\((.*?)\))/ do |text|
    if $2 or type = $3
      text.gsub! /#\{(.*?)\}/ do
        %Q(<code>\#{#{highlight($1)}}</code>)
      end
    end
    %Q(<q>#{text}</q>)
  end
  code.gsub! %r(&lt;&lt;-<b>HALLO</b>.*<b>HALLO</b>) do |text|
    if $2 or type = $3
      text.gsub! /#\{(.*?)\}/ do
        %Q(<code>\#{#{highlight($1)}}</code>)
      end
    end
    %Q(<q>#{text}</q>)
  end
  code.gsub! %r((\#.*?)$) do |comment|
    if comment.gsub(%r(<q>(.*?)</q>), "\\1") =~ %r(</q>)
      comment
    else
      comment.gsub! %r(</?(b|i|em|var|code)>), ""
      %Q(<i>#{comment}</i>)
    end
  end
  code.gsub!('<i><i>', '<i>')
  code
end