95 lines
2.9 KiB
Ruby
95 lines
2.9 KiB
Ruby
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module CodeRay
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# A little hack to enable CodeRay highlighting in RedCloth.
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#
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# Usage:
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# require 'coderay'
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# require 'coderay/for_redcloth'
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# RedCloth.new('@[ruby]puts "Hello, World!"@').to_html
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#
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# Make sure you have RedCloth 4.0.3 activated, for example by calling
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# require 'rubygems'
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# before RedCloth is loaded and before calling CodeRay.for_redcloth.
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module ForRedCloth
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def self.install
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gem 'RedCloth', '>= 4.0.3' if defined? gem
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require 'redcloth'
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unless RedCloth::VERSION.to_s >= '4.0.3'
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if defined? gem
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raise 'CodeRay.for_redcloth needs RedCloth version 4.0.3 or later. ' +
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"You have #{RedCloth::VERSION}. Please gem install RedCloth."
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else
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$".delete 'redcloth.rb' # sorry, but it works
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require 'rubygems'
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return install # retry
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end
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end
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unless RedCloth::VERSION.to_s >= '4.2.2'
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warn 'CodeRay.for_redcloth works best with RedCloth version 4.2.2 or later.'
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end
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RedCloth::TextileDoc.send :include, ForRedCloth::TextileDoc
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RedCloth::Formatters::HTML.module_eval do
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def unescape(html)
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replacements = {
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'&' => '&',
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'"' => '"',
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'>' => '>',
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'<' => '<',
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}
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html.gsub(/&(?:amp|quot|[gl]t);/) { |entity| replacements[entity] }
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end
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undef code, bc_open, bc_close, escape_pre
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def code(opts) # :nodoc:
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opts[:block] = true
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if !opts[:lang] && RedCloth::VERSION.to_s >= '4.2.0'
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# simulating pre-4.2 behavior
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if opts[:text].sub!(/\A\[(\w+)\]/, '')
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if CodeRay::Scanners[$1].plugin_id == 'plaintext'
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opts[:text] = $& + opts[:text]
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else
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opts[:lang] = $1
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end
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end
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end
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if opts[:lang] && !filter_coderay
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require 'coderay'
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@in_bc ||= nil
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format = @in_bc ? :div : :span
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opts[:text] = unescape(opts[:text]) unless @in_bc
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highlighted_code = CodeRay.encode opts[:text], opts[:lang], format, :stream => true
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highlighted_code.sub!(/\A<(span|div)/) { |m| m + pba(@in_bc || opts) }
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highlighted_code
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else
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"<code#{pba(opts)}>#{opts[:text]}</code>"
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end
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end
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def bc_open(opts) # :nodoc:
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opts[:block] = true
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@in_bc = opts
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opts[:lang] ? '' : "<pre#{pba(opts)}>"
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end
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def bc_close(opts) # :nodoc:
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opts = @in_bc
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@in_bc = nil
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opts[:lang] ? '' : "</pre>\n"
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end
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def escape_pre(text)
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if @in_bc ||= nil
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text
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else
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html_esc(text, :html_escape_preformatted)
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end
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end
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end
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end
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module TextileDoc # :nodoc:
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attr_accessor :filter_coderay
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end
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end
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end
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CodeRay::ForRedCloth.install
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