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module CodeRay
# 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.
module ForRedCloth
def self.install
gem 'RedCloth', '>= 4.0.3' rescue nil
require 'redcloth'
raise 'CodeRay.for_redcloth needs RedCloth 4.0.3 or later.' unless RedCloth::VERSION.to_s >= '4.0.3'
RedCloth::TextileDoc.send :include, ForRedCloth::TextileDoc
RedCloth::Formatters::HTML.module_eval do
def unescape(html)
replacements = {
'&' => '&',
'"' => '"',
'>' => '>',
'<' => '<',
}
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] && !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:
@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
module TextileDoc # :nodoc:
attr_accessor :filter_coderay
end
end
end
CodeRay::ForRedCloth.install
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