Merge commit 'mainstream/master'

1 files changed, 28 insertions, 0 deletions

diff --git a/actionpack/lib/action_view/safe_buffer.rb b/actionpack/lib/action_view/safe_buffer.rb
new file mode 100644
index 0000000000..8ba9cd80d6
--- /dev/null
+++ b/actionpack/lib/action_view/safe_buffer.rb
@@ -0,0 +1,28 @@
+
+module ActionView #:nodoc:
+  class SafeBuffer < String
+    def <<(value)
+      if value.html_safe?
+        super(value)
+      else
+        super(CGI.escapeHTML(value))
+      end
+    end
+
+    def concat(value)
+      self << value
+    end
+
+    def html_safe?
+      true
+    end
+
+    def html_safe!
+      self
+    end
+
+    def to_s
+      self
+    end
+  end
+end
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