Add support for textilize and coderay to Posts

* Add RedCloth and coderay gems * Write and satisfy tests for textilize and coderay helpers
mrDoktar · May 11, 2010 · 1252941 · 1252941
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commit 1252941
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diff --git a/Gemfile b/Gemfile
@@ -4,6 +4,9 @@ gem 'rails', '3.0.0.beta3'
 
 gem 'haml', '>= 3.0.0'
 
+gem 'RedCloth'
+gem 'coderay'
+
 gem 'sqlite3-ruby', :require => 'sqlite3'
 
 group :test do

diff --git a/app/helpers/posts_helper.rb b/app/helpers/posts_helper.rb
@@ -1,2 +1,28 @@
 module PostsHelper
+
+  # Note that it marks content as html_safe!
+  def textilize_and_highlight(text)
+    textilize(code_highlight(text))
+  end
+
+  def code_highlight(text)
+    text.gsub(/\<code(?:(?:\s+title="([^"]+?)")|(?:\s+lang="([^"]+?)"))*\s*\>(.+?)\<\/code\>/m) do
+      if $1.present?
+        "\n" + content_tag(:notextile) do
+          content_tag(:div, :class => "code") do
+            content_tag(:h5, $1) + coderay($3, $2)
+          end
+        end + "\n"
+      else
+        content_tag(:notextile) do
+          coderay($3, $2, :span)
+        end
+      end
+    end
+  end  
+
+  def coderay(text, lang, type = :div)
+    CodeRay.scan(text, lang).send(type, :css => :class).html_safe + " "
+  end
+
 end
diff --git a/spec/helpers/posts_helper_spec.rb b/spec/helpers/posts_helper_spec.rb
@@ -0,0 +1,38 @@
+require 'spec_helper'
+
+describe PostsHelper do
+
+  include PostsHelper
+  include ActionView::Helpers
+
+  attr_accessor :output_buffer
+
+  it "should textilize and color the post correctly" do
+    text = 'h1. My header
+
+<code lang="javascript" title="My title">
+<script>
+  var foo = "bar";
+</script>
+</code>
+
+h2. More code
+
+This is <code lang="html"><div></code> should be coloured.'
+
+    formatted_text = '<h1>My header</h1>
+<div class="code"><h5>My title</h5><div class="CodeRay">
+  <div class="code"><pre>
+<span class="ta">&lt;script&gt;</span>
+  var foo = &quot;bar&quot;;
+<span class="ta">&lt;/script&gt;</span>
+</pre></div>
+</div>
+ </div><h2>More code</h2>
+<p>This is <span class="CodeRay"><span class="ta">&lt;div&gt;</span></span>  should be coloured.</p>'
+
+    response = textilize_and_highlight(text)
+
+    response.should == formatted_text
+  end
+end