comparison vendor/plugins/coderay-0.9.2/lib/coderay/for_redcloth.rb @ 0:513646585e45

* Import Redmine trunk SVN rev 3859

+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' if defined? gem
+      require 'redcloth'
+      unless RedCloth::VERSION.to_s >= '4.0.3'
+        if defined? gem
+          raise 'CodeRay.for_redcloth needs RedCloth version 4.0.3 or later. ' +
+            "You have #{RedCloth::VERSION}. Please gem install RedCloth."
+        else
+          $".delete 'redcloth.rb'  # sorry, but it works
+          require 'rubygems'
+          return install  # retry
+        end
+      end
+      unless RedCloth::VERSION.to_s >= '4.2.2'
+        warn 'CodeRay.for_redcloth works best with RedCloth version 4.2.2 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 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
+            if opts[:text].sub!(/\A\[(\w+)\]/, '')
+              if CodeRay::Scanners[$1].plugin_id == 'plaintext'
+                opts[:text] = $& + opts[:text]
+              else
+                opts[:lang] = $1
+              end
+            end
+          end
+          if opts[:lang] && !filter_coderay
+            require 'coderay'
+            @in_bc ||= nil
+            format = @in_bc ? :div : :span
+            opts[:text] = unescape(opts[:text]) unless @in_bc
+            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
+          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
+
+    module TextileDoc  # :nodoc:
+      attr_accessor :filter_coderay
+    end
+    
+  end
+  
+end
+
+CodeRay::ForRedCloth.install