Replace rdiscount filter with config-aware markdownify.

History.txt

@@ -3,6 +3,7 @@
     * Add command line importer functionality (#253)
     * Add Recarpet Markdown support (#318)
     * Make markdown/textile extensions configurable (#312)
+    * Add `markdownify` filter
   * Minor Enhancements
     * Switch to Albino gem
     * Bundler support

lib/jekyll/filters.rb

@@ -9,16 +9,20 @@ module Jekyll
     #
     # Returns the HTML formatted String.
     def textilize(input)
-      TextileConverter.new.convert(input)
+      site = @context.registers[:site]
+      converter = site.getConverterImpl(Jekyll::TextileConverter)
+      converter.convert(input)
     end
 
-    # Convert a Markdown string into HTML output using RDiscount.
+    # Convert a Markdown string into HTML output.
     #
     # input - The Markdown String to convert.
     #
     # Returns the HTML formatted String.
-    def rdiscount(input)
-      RDiscount.new(input).to_html
+    def markdownify(input)
+      site = @context.registers[:site]
+      converter = site.getConverterImpl(Jekyll::MarkdownConverter)
+      converter.convert(input)
     end
 
     # Format a date in short format e.g. "27 Jan 2011".

lib/jekyll/site.rb

@@ -314,5 +314,18 @@ module Jekyll
       end
     end
 
+    # Get the implementation class for the given Converter.
+    #
+    # klass - The Class of the Converter to fetch.
+    #
+    # Returns the Converter instance implementing the given Converter.
+    def getConverterImpl(klass)
+      matches = self.converters.select { |c| c.class == klass }
+      if impl = matches.first
+        impl
+      else
+        raise "Converter implementation not found for #{klass}"
+      end
+    end
   end
 end

test/helper.rb

@@ -12,7 +12,6 @@ require 'redgreen' if RUBY_VERSION < '1.9'
 require 'shoulda'
 require 'rr'
 
-
 include Jekyll
 
 # Send STDERR into the void to suppress program output messages

test/test_filters.rb

@@ -3,6 +3,11 @@ require 'helper'
 class TestFilters < Test::Unit::TestCase
   class JekyllFilter
     include Jekyll::Filters
+
+    def initialize
+      site = Jekyll::Site.new(Jekyll.configuration({}))
+      @context = Liquid::Context.new({}, {}, { :site => site })
+    end
   end
 
   context "filters" do
@@ -14,8 +19,8 @@ class TestFilters < Test::Unit::TestCase
       assert_equal "<p>something <strong>really</strong> simple</p>", @filter.textilize("something *really* simple")
     end
 
-    should "rdiscount with simple string" do
-      assert_equal "<p>something <strong>really</strong> simple</p>\n", @filter.rdiscount("something **really** simple")
+    should "markdownify with simple string" do
+      assert_equal "<p>something <strong>really</strong> simple</p>", @filter.markdownify("something **really** simple")
     end
 
     should "convert array to sentence string with no args" do