From dbd0bd5e5c9946ffb48bf8651f81ebc6dd9b52e5 Mon Sep 17 00:00:00 2001
From: Rick Olson <technoweenie@gmail.com>
Date: Wed, 18 Oct 2006 16:42:19 +0000
Subject: [PATCH] Add <%= escape_once html %> to escape html while leaving any
 currently escaped entities alone.  Fix button_to double-escaping issue.
 [Rick]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5322 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 actionpack/CHANGELOG                             |  2 ++
 actionpack/lib/action_view/helpers/tag_helper.rb | 11 ++++++++++-
 actionpack/lib/action_view/helpers/url_helper.rb |  4 ++--
 actionpack/test/template/tag_helper_test.rb      |  4 ++++
 actionpack/test/template/url_helper_test.rb      |  4 ++++
 5 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/actionpack/CHANGELOG b/actionpack/CHANGELOG
index 1993fcf41c..05f2328f7d 100644
--- a/actionpack/CHANGELOG
+++ b/actionpack/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Add <%= escape_once html %> to escape html while leaving any currently escaped entities alone.  Fix button_to double-escaping issue. [Rick]
+
 * Fix double-escaped entities, such as &amp;amp;, &amp;#123;, etc. [Rick]
 
 * Fix deprecation warnings when rendering the template error template. [Nicholas Seckar]
diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index 6001b21e63..f913c99abb 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -31,10 +31,19 @@ module ActionView
         "<![CDATA[#{content}]]>"
       end
 
+      # Escapes a given string, while leaving any currently escaped entities alone.
+      #
+      #   escape_once("1 > 2 &amp; 3")
+      #   # => "1 &lt; 2 &amp; 3"
+      #
+      def escape_once(html)
+        fix_double_escape(html_escape(html.to_s))
+      end
+
       private
         def tag_options(options)
           cleaned_options = convert_booleans(options.stringify_keys.reject {|key, value| value.nil?})
-          ' ' + cleaned_options.map {|key, value| %(#{key}="#{fix_double_escape(html_escape(value.to_s))}")}.sort * ' ' unless cleaned_options.empty?
+          ' ' + cleaned_options.map {|key, value| %(#{key}="#{escape_once(value)}")}.sort * ' ' unless cleaned_options.empty?
         end
 
         def convert_booleans(options)
diff --git a/actionpack/lib/action_view/helpers/url_helper.rb b/actionpack/lib/action_view/helpers/url_helper.rb
index 42c28335d5..4f52a018a7 100644
--- a/actionpack/lib/action_view/helpers/url_helper.rb
+++ b/actionpack/lib/action_view/helpers/url_helper.rb
@@ -131,8 +131,8 @@ module ActionView
         name ||= url
 
         html_options.merge!("type" => "submit", "value" => name)
-
-        "<form method=\"#{form_method}\" action=\"#{h url}\" class=\"button-to\"><div>" + 
+        
+        "<form method=\"#{form_method}\" action=\"#{escape_once url}\" class=\"button-to\"><div>" + 
           method_tag + tag("input", html_options) + "</div></form>"
       end
 
diff --git a/actionpack/test/template/tag_helper_test.rb b/actionpack/test/template/tag_helper_test.rb
index 8611f4c9bd..bda57c4e9b 100644
--- a/actionpack/test/template/tag_helper_test.rb
+++ b/actionpack/test/template/tag_helper_test.rb
@@ -39,6 +39,10 @@ class TagHelperTest < Test::Unit::TestCase
     assert_equal "<![CDATA[<hello world>]]>", cdata_section("<hello world>")
   end
   
+  def test_escape_once
+    assert_equal '1 &lt; 2 &amp; 3', escape_once('1 < 2 &amp; 3')
+  end
+  
   def test_double_escaping_attributes
     ['1&amp;2', '1 &lt; 2', '&#8220;test&#8220;'].each do |escaped|
       assert_equal %(<a href="#{escaped}" />), tag('a', :href => escaped)
diff --git a/actionpack/test/template/url_helper_test.rb b/actionpack/test/template/url_helper_test.rb
index 77ca8094f7..ba813f72ce 100644
--- a/actionpack/test/template/url_helper_test.rb
+++ b/actionpack/test/template/url_helper_test.rb
@@ -38,6 +38,10 @@ class UrlHelperTest < Test::Unit::TestCase
     assert_dom_equal "<form method=\"post\" action=\"http://www.example.com/q1=v1&amp;q2=v2\" class=\"button-to\"><div><input type=\"submit\" value=\"Hello\" /></div></form>", button_to("Hello", "http://www.example.com/q1=v1&q2=v2")
   end
 
+  def test_button_to_with_escaped_query
+    assert_dom_equal "<form method=\"post\" action=\"http://www.example.com/q1=v1&amp;q2=v2\" class=\"button-to\"><div><input type=\"submit\" value=\"Hello\" /></div></form>", button_to("Hello", "http://www.example.com/q1=v1&amp;q2=v2")
+  end
+
   def test_button_to_with_query_and_no_name
     assert_dom_equal "<form method=\"post\" action=\"http://www.example.com?q1=v1&amp;q2=v2\" class=\"button-to\"><div><input type=\"submit\" value=\"http://www.example.com?q1=v1&amp;q2=v2\" /></div></form>", button_to(nil, "http://www.example.com?q1=v1&q2=v2")
   end