Add an :escaped filter for escaped plain text.

lib/haml.rb

@@ -655,6 +655,9 @@ $LOAD_PATH << dir unless $LOAD_PATH.include?(dir)
 # [javascript] Surrounds the filtered text with <script> and CDATA tags.
 #              Useful for including inline Javascript.
 #
+# [escaped]    Works the same as plain, but HTML-escapes the text
+#              before placing it in the document.
+#
 # [ruby]       Parses the filtered text with the normal Ruby interpreter.
 #              All output sent to <tt>$stdout</tt>, like with +puts+,
 #              is output into the Haml document.

lib/haml/engine.rb

@@ -65,6 +65,7 @@ module Haml
           'sass' => Haml::Filters::Sass,
           'plain' => Haml::Filters::Plain,
           'javascript' => Haml::Filters::Javascript,
+          'escaped' => Haml::Filters::Escaped,
           'preserve' => Haml::Filters::Preserve,
           'redcloth' => Haml::Filters::RedCloth,
           'textile' => Haml::Filters::Textile,

lib/haml/filters.rb

@@ -156,6 +156,14 @@ END
       end
     end
 
+    module Escaped
+      include Base
+
+      def render(text)
+        Haml::Helpers.html_escape text
+      end
+    end
+
     module Ruby
       include Base
       lazy_require 'stringio'

test/haml/results/filters.xhtml

@@ -79,4 +79,6 @@ This pre is pretty deeply
      nested.
   Does interpolation work
 Text!
 Hello, World!
 How are you doing today?
-
+<div class="foo">
+  <p>I think — or do I?</p>
+</div>

test/haml/templates/filters.haml

@@ -79,3 +79,8 @@
 :ruby
   printf "%s, World!\n", var
   print "How are you doing today?\n"
+
+:escaped
+  <div class="foo">
+    <p>I think &mdash; or do I?</p>
+  </div>