## mark a section (Learn more)

# codecloth.rb # By Nathan Weizenbaum (http://nex3.leeweiz.net) # MIT License (http://www.opensource.org/licenses/mit-license.php) # # Integrating CodeRay syntax highlighting with RedCloth. # Check out http://nex3.leeweiz.net/posts/31-a-solution-to-the-syntax-highlighting-problem require 'rubygems' require 'redcloth' require 'coderay' module CodeCloth HTML_OPTIONS = { :wrap => :div } def self.included(other) other::BASIC_TAGS['span'] = ['class'] other::BASIC_TAGS['div'] = ['class'] other::BASIC_TAGS['codeclothpre'] = nil other::DEFAULT_RULES.insert 0, :block_syntax_set other.send :alias_method, :to_html_without_syntax, :to_html other.send :alias_method, :to_html, :to_html_with_syntax other.send :alias_method, :initialize_without_scanner, :initialize other.send :alias_method, :initialize, :initialize_with_scanner end def initialize_with_scanner(*whatever) initialize_without_scanner(*whatever) @scanner = CodeRay::Scanners['plain'] end def block_syntax_set(text) return nil if text[0] != ?$ syntax, rest = text.split "\n", 2 syntax.slice! 0 syntax.strip! syntax.downcase! scanner = CodeRay::Scanners[syntax.empty? ? 'plain' : syntax] if rest.nil? @scanner = scanner text.replace('') else text.replace rest.gsub(/^#{'\s' * rest.index(/[^\s]/)}/, '') blocks text, true syntaxify text, scanner end end def to_html_with_syntax(*whatever) unescape_pre syntaxify(syntaxify_manual_html(to_html_without_syntax(*whatever)), @scanner) end private SYNTAXLESS_CODE_RE = /<pre>(?:<code>)?(.*?)(?:<\/code>)?<\/pre>/m def syntaxify(text, scanner) text.gsub!(SYNTAXLESS_CODE_RE) do escape_pre scanner.new($1).tokenize.html(HTML_OPTIONS) end text end MANUAL_HTML_RE = /^\$([^\n]+)\n(#{SYNTAXLESS_CODE_RE})/ def syntaxify_manual_html(text) text.gsub!(MANUAL_HTML_RE) do syntaxify $2, CodeRay::Scanners[$1.strip.downcase] end text end def escape_pre(text) text.gsub(/<(\/?)pre>/, '<\1codeclothpre>') end def unescape_pre(text) text.gsub(/<(\/?)codeclothpre>/, '<\1pre>') end end RedCloth.send :include, CodeCloth

This paste will be private.