Module: CodeRay::ForRedCloth

Defined in:
lib/coderay/for_redcloth.rb

Overview

A little hack to enable CodeRay highlighting in RedCloth.

Usage:

require 'coderay'
require 'coderay/for_redcloth'
RedCloth.new('@[ruby]puts "Hello, World!"@').to_html

Make sure you have RedCloth 4.0.3 activated, for example by calling

require 'rubygems'

before RedCloth is loaded and before calling CodeRay.for_redcloth.

Defined Under Namespace

Modules: TextileDoc

Class Method Summary collapse

Class Method Details

.installObject



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
# File 'lib/coderay/for_redcloth.rb', line 15

def self.install
  gem 'RedCloth', '>= 4.0.3' rescue nil
  require 'redcloth'
  unless RedCloth::VERSION.to_s >= '4.0.3'
    raise 'CodeRay.for_redcloth needs RedCloth version 4.0.3 or later.'
  end
  RedCloth::TextileDoc.send :include, ForRedCloth::TextileDoc
  RedCloth::Formatters::HTML.module_eval do
    def unescape(html)
      replacements = {
        '&' => '&',
        '"' => '"',
        '>' => '>',
        '&lt;' => '<',
      }
      html.gsub(/&(?:amp|quot|[gl]t);/) { |entity| replacements[entity] }
    end
    undef_method :code, :bc_open, :bc_close, :escape_pre
    def code(opts)  # :nodoc:
      opts[:block] = true
      if !opts[:lang] && RedCloth::VERSION.to_s >= '4.2.0'
        # simulating pre-4.2 behavior
        opts[:text].sub!(/\A\[(\w+)\]/, '')
        opts[:lang] = $1
      end
      if opts[:lang] && !filter_coderay
        require 'coderay'
        @in_bc ||= nil
        format = @in_bc ? :div : :span
        highlighted_code = CodeRay.encode opts[:text], opts[:lang], format, :stream => true
        highlighted_code.sub!(/\A<(span|div)/) { |m| m + pba(@in_bc || opts) }
        highlighted_code = unescape(highlighted_code) unless @in_bc
        highlighted_code
      else
        "<code#{pba(opts)}>#{opts[:text]}</code>"
      end
    end
    def bc_open(opts)  # :nodoc:
      opts[:block] = true
      @in_bc = opts
      opts[:lang] ? '' : "<pre#{pba(opts)}>"
    end
    def bc_close(opts)  # :nodoc:
      opts = @in_bc
      @in_bc = nil
      opts[:lang] ? '' : "</pre>\n"
    end
    def escape_pre(text)
      if @in_bc ||= nil
        text
      else
        html_esc(text, :html_escape_preformatted)
      end
    end
  end
end