From 8ccaa34103f1c37f7549f7f6c47a21dba21624db Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Valim?= <jose.valim@gmail.com>
Date: Wed, 29 Feb 2012 22:30:51 +0100
Subject: Ensure [] respects the status of the buffer.

---
 .../core_ext/string/output_safety.rb               | 30 +++++++++++++---------
 1 file changed, 18 insertions(+), 12 deletions(-)

(limited to 'activesupport/lib/active_support/core_ext/string/output_safety.rb')

diff --git a/activesupport/lib/active_support/core_ext/string/output_safety.rb b/activesupport/lib/active_support/core_ext/string/output_safety.rb
index 7f158369f4..728ab087fa 100644
--- a/activesupport/lib/active_support/core_ext/string/output_safety.rb
+++ b/activesupport/lib/active_support/core_ext/string/output_safety.rb
@@ -103,19 +103,31 @@ module ActiveSupport #:nodoc:
       end
     end
 
+    def [](*args)
+      return super if args.size < 2
+
+      if html_safe?
+        new_safe_buffer = super
+        new_safe_buffer.instance_eval { @html_safe = true }
+        new_safe_buffer
+      else
+        to_str[*args]
+      end
+    end
+
     def safe_concat(value)
-      raise SafeConcatError if dirty?
+      raise SafeConcatError unless html_safe?
       original_concat(value)
     end
 
     def initialize(*)
-      @dirty = false
+      @html_safe = true
       super
     end
 
     def initialize_copy(other)
       super
-      @dirty = other.dirty?
+      @html_safe = other.html_safe?
     end
 
     def clone_empty
@@ -125,7 +137,7 @@ module ActiveSupport #:nodoc:
     end
 
     def concat(value)
-      if dirty? || value.html_safe?
+      if !html_safe? || value.html_safe?
         super(value)
       else
         super(ERB::Util.h(value))
@@ -138,7 +150,7 @@ module ActiveSupport #:nodoc:
     end
 
     def html_safe?
-      !dirty?
+      defined?(@html_safe) && @html_safe
     end
 
     def to_s
@@ -161,18 +173,12 @@ module ActiveSupport #:nodoc:
           end                                       # end
 
           def #{unsafe_method}!(*args)              # def capitalize!(*args)
-            @dirty = true                           #   @dirty = true
+            @html_safe = false                      #   @html_safe = false
             super                                   #   super
           end                                       # end
         EOT
       end
     end
-
-    protected
-
-    def dirty?
-      @dirty
-    end
   end
 end
 
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