From d10d2220767324c2aa02d413196e5ff83ccc3503 Mon Sep 17 00:00:00 2001
From: Brandon Mathis <brandon@imathis.com>
Date: Thu, 28 Jul 2011 14:44:18 -0400
Subject: [PATCH] updated Github style backtick filter to support textile,
 markdown and html

---
 plugins/octopress_filters.rb | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/plugins/octopress_filters.rb b/plugins/octopress_filters.rb
index 7d73bde..8c9367b 100644
--- a/plugins/octopress_filters.rb
+++ b/plugins/octopress_filters.rb
@@ -26,11 +26,25 @@ module OctopressFilters
   #     code snippet
   # ```
   def backtick_codeblock(input)
-    input.gsub /<p>`{3}\s(\w+)<\/p>\n\n<pre><code>([^<]+)<\/code><\/pre>\n\n<p>`{3}<\/p>/m do
+    # Markdown support
+    input = input.gsub /<p>`{3}\s(\w+)<\/p>\s*<pre><code>\s*(.+?)\s*<\/code><\/pre>\s*<p>`{3}<\/p>/m do
       lang = $1
       str  = $2.gsub('&lt;','<').gsub('&gt;','>')
       highlight(str, lang)
     end
+
+    # Textile support
+    input = input.gsub /<p>`{3}\s(\w+)<br\s*\/>\n(.+?)`{3}<\/p>/m do
+      lang = $1
+      str  = $2.gsub(/^\s{4}/, '').gsub(/<br\s*\/>$/, '')
+      highlight(str, lang)
+    end
+
+    input.gsub /^`{3}\s(\w+)\n(.+?)\n`{3}/m do
+      lang = $1
+      str  = $2.gsub(/^\s{4}/, '')
+      highlight(str, lang)
+    end
   end
 
   # Replaces relative urls with full urls