Added TextHelper#simple_format as a non-dependency text presentation …

…helper.Fixed TextHelper#markdown to use blank? instead of empty? so it can deal with nil strings passed #814 [Johan Sorensen]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@933 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,9 @@
 *SVN*
 
+* Fixed TextHelper#markdown to use blank? instead of empty? so it can deal with nil strings passed #814 [Johan Sörensen]
+
+* Added TextHelper#simple_format as a non-dependency text presentation helper #814 [Johan Sörensen]
+
 * Added that the html options disabled, readonly, and multiple can all be treated as booleans. So specifying <tt>disabled => :true</tt> will give <tt>disabled="disabled"</tt>. #809 [mindel]
 
 * Added path collection syntax for Routes that will gobble up the rest of the url and pass it on to the controller #830 [rayners]. Example:

actionpack/lib/action_view/helpers/text_helper.rb

@@ -90,11 +90,24 @@ def textilize_without_paragraph(text)
         # Returns the text with all the Markdown codes turned into HTML-tags.
         # <i>This method is only available if BlueCloth can be required</i>.
         def markdown(text)
-          text.empty? ? "" : BlueCloth.new(text).to_html
+          text.blank? ? "" : BlueCloth.new(text).to_html
         end
       rescue LoadError
         # We can't really help what's not there
       end
+
+      # Returns +text+ transformed into html using very simple formatting rules
+      # Surrounds paragraphs with <tt>&lt;p&gt;</tt> tags, and converts line breaks into <tt>&lt;br /&gt;</tt>
+      # Two consecutive newlines(<tt>\n\n</tt>) are considered as a paragraph, one newline (<tt>\n</tt>) is
+      # considered a linebreak, three or more consecutive newlines are turned into two newlines 
+      def simple_format(text)
+        text.gsub!(/(\r\n|\n|\r)/, "\n") # lets make them newlines crossplatform
+        text.gsub!(/\n\n+/, "\n\n") # zap dupes
+        text.gsub!(/\n\n/, '</p>\0<p>') # turn two newlines into paragraph
+        text.gsub!(/([^\n])(\n)([^\n])/, '\1\2<br />\3') # turn single newline into <br />
+
+        return '<p>' + text + '</p>' # wrap the first and last line in paragraphs before we're done
+      end
 
       # Turns all urls and email addresses into clickable links. The +link+ parameter can limit what should be linked.
       # Options are :all (default), :email_addresses, and :urls.

actionpack/test/template/text_helper_test.rb

@@ -3,6 +3,12 @@
 
 class TextHelperTest < Test::Unit::TestCase
   include ActionView::Helpers::TextHelper
+
+  def test_simple_format
+    assert_equal "<p>crazy\n<br /> cross\n<br /> platform linebreaks</p>", simple_format("crazy\r\n cross\r platform linebreaks")
+    assert_equal "<p>A paragraph</p>\n\n<p>and another one!</p>", simple_format("A paragraph\n\nand another one!")
+    assert_equal "<p>A paragraph\n<br /> With a newline</p>", simple_format("A paragraph\n With a newline")
+  end
 
   def test_truncate
     assert_equal "Hello World!", truncate("Hello World!", 12)