Added code highlighting support in wiki, using this syntax:

<pre><code> <-- cut here

  <pre><code class="ruby">
    Place you code here.
  </code></pre>  

cut here --> </pre></code>

git-svn-id: http://redmine.rubyforge.org/svn/trunk@710 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/wiki/edit.rhtml

@@ -25,3 +25,7 @@
 <% end %>
 
 <div id="preview" class="wiki"></div>
+
+<% content_for :header_tags do %>
+  <%= stylesheet_link_tag 'scm' %>
+<% end %>

app/views/wiki/show.rhtml

@@ -37,3 +37,7 @@
 <%= submit_tag l(:button_add) %>
 <% end %>
 <% end %>
+
+<% content_for :header_tags do %>
+  <%= stylesheet_link_tag 'scm' %>
+<% end %>

lib/redmine/wiki_formatting.rb

@@ -1,4 +1,5 @@
 require 'redcloth'
+require 'coderay'
 
 module Redmine
   module WikiFormatting
@@ -24,7 +25,22 @@ module Redmine
       def hard_break( text ) 
         text.gsub!( /(.)\n(?!\n|\Z| *([#*=]+(\s|$)|[{|]))/, "\\1<br />" ) if hard_breaks 
       end
-  
+      
+      # Patch to add code highlighting support to RedCloth
+      def smooth_offtags( text )
+        unless @pre_list.empty?
+          ## replace <pre> content
+          text.gsub!(/<redpre#(\d+)>/) do
+            content = @pre_list[$1.to_i]
+            if content.match(/<code\s+class="(\w+)">\s?(.+)/m)
+              content = "<code class=\"#{$1} CodeRay\">" + 
+                CodeRay.scan($2, $1).html(:escape => false, :line_numbers => :inline)
+            end
+            content
+          end
+        end
+      end
+      
       AUTO_LINK_RE = %r{
                         (                          # leading text
                           <\w+.*?>|                # leading HTML tag, or

public/stylesheets/scm.css

@@ -29,7 +29,7 @@ table.list thead th.list-filename {
 
 /************* Coderay styles *************/
 
-.CodeRay {
+table.CodeRay {
   background-color: #fafafa;
 }
 .CodeRay pre { margin: 0px }

vendor/plugins/coderay-0.7.6.227/lib/coderay/encoders/html.rb

@@ -25,6 +25,10 @@ module Encoders
   #
   # == Options
   #
+  # === :escape
+  # Escape html entities
+  # Default: true
+  #
   # === :tab_width
   # Convert \t characters to +n+ spaces (a number.)
   # Default: 8
@@ -70,6 +74,7 @@ module Encoders
     FILE_EXTENSION = 'html'
 
     DEFAULT_OPTIONS = {
+      :escape => true,
       :tab_width => 8,
 
       :level => :xhtml,
@@ -145,6 +150,7 @@ module Encoders
       @HTML_ESCAPE = HTML_ESCAPE.dup
       @HTML_ESCAPE["\t"] = ' ' * options[:tab_width]
 
+      @escape = options[:escape]
       @opened = [nil]
       @css = CSS.new options[:style]
 
@@ -222,7 +228,7 @@ module Encoders
 
     def token text, type
       if text.is_a? ::String
-        if text =~ /#{HTML_ESCAPE_PATTERN}/o
+        if @escape && (text =~ /#{HTML_ESCAPE_PATTERN}/o)
           text = text.gsub(/#{HTML_ESCAPE_PATTERN}/o) { |m| @HTML_ESCAPE[m] }
         end
         @opened[0] = type