Rewrite css filter

lib/hamlit/filters/css.rb

@@ -2,14 +2,42 @@ module Hamlit
   class Filters
     class Css < Base
       def compile(node)
-        text = compile_text(node.value[:text])
         case @format
         when :xhtml
-          compile_xhtml('style', 'text/css', text)
+          compile_xhtml(node)
         else
-          compile_html('style', text)
+          compile_html(node)
         end
       end
+
+      private
+
+      def compile_text!(temple, node, prefix)
+        (node.value[:text].rstrip << "\n").each_line do |line|
+          if Haml::Util.contains_interpolation?(line)
+            temple << [:dynamic, Haml::Util.unescape_interpolation(prefix.dup << line)]
+          else
+            temple << [:static, prefix.dup << line]
+          end
+          temple << [:newline]
+        end
+      end
+
+      def compile_html(node)
+        temple = [:multi]
+        temple << [:static, "<style>\n".freeze]
+        compile_text!(temple, node, '  '.freeze)
+        temple << [:static, '</style>'.freeze]
+        temple
+      end
+
+      def compile_xhtml(node)
+        temple = [:multi]
+        temple << [:static, "<style type='text/css'>\n  /*<![CDATA[*/\n".freeze]
+        compile_text!(temple, node, '    '.freeze)
+        temple << [:static, "  /*]]>*/\n</style>".freeze]
+        temple
+      end
     end
   end
 end

test/hamlit/filters/css_test.rb

@@ -3,7 +3,6 @@ describe Hamlit::Filters do
 
   describe '#compile' do
     it 'renders css' do
-      skip
       assert_render(<<-HAML, <<-HTML)
         :css
           .foo {
@@ -19,7 +18,6 @@ describe Hamlit::Filters do
     end
 
     it 'parses string interpolation' do
-      skip
       assert_render(<<-'HAML', <<-HTML)
         :css
           .foo {