Merge branch 'master' of git://github.com/lifo/docrails

* 'master' of git://github.com/lifo/docrails: (259 commits)
  Fix a small typo
  ensure authors get warnings about broken links, and ensure end users don't
  in guides generator, warn about duplicate header IDs only if WARN_DUPLICATE_HEADERS
  replace edit distance implementation with one written from scratch to avoid license issues
  removes a wrong comment in the finders guide
  updates fxn picture
  thanks but release notes are mostly frozen once they are published, and provide only an overview of the new stuff
  Added extra notes to nested model forms explanation in 2.3 release notes to cover has_one relationships
  clarifies a bit more what's the issue with check boxes and arrays of parameters
  be even more ambiguous about the order of generation of hidden input for check boxes in form helper guide
  this page referred to an :href_options keyword hash, in fact the correct keyword (the one the code responds to) is :html
  update explanation of check box generation according to f400209
  Hidden field with check box goes first.
  update rack fixture to be ruby 1.9 compat
  Better error message to try to figure out why the CI build is failing
  ruby 1.9 compat: Pathname doesn't support =~
  update rack fixture to be ruby 1.9 compat
  update metal fixtures to be ruby 1.9 compat
  Fix brittle Time.now mock
  Ensure our bundled version of rack is at the front of the load path
  ...

1 files changed, 16 insertions, 9 deletions

diff --git a/actionpack/lib/action_controller/layout.rb b/actionpack/lib/action_controller/layout.rb
index a0db7acf72..6ec0c1b304 100644
--- a/actionpack/lib/action_controller/layout.rb
+++ b/actionpack/lib/action_controller/layout.rb
@@ -198,7 +198,7 @@ module ActionController #:nodoc:
     # is called and the return value is used. Likewise if the layout was specified as an inline method (through a proc or method
     # object). If the layout was defined without a directory, layouts is assumed. So <tt>layout "weblog/standard"</tt> will return
     # weblog/standard, but <tt>layout "standard"</tt> will return layouts/standard.
-    def active_layout(passed_layout = nil)
+    def active_layout(passed_layout = nil, options = {})
       layout = passed_layout || default_layout
       return layout if layout.respond_to?(:render)
 
@@ -207,21 +207,23 @@ module ActionController #:nodoc:
         when Proc   then layout.call(self)
         else layout
       end
-      
-      find_layout(active_layout, @template.template_format) if active_layout
+
+      find_layout(active_layout, default_template_format, options[:html_fallback]) if active_layout
     end
 
     private
       def default_layout #:nodoc:
-        layout = self.class.read_inheritable_attribute(:layout) unless default_template_format == :js
+        layout = self.class.read_inheritable_attribute(:layout)
         return layout unless self.class.read_inheritable_attribute(:auto_layout)
         find_layout(layout, default_template_format)
       rescue ActionView::MissingTemplate
         nil
       end
 
-      def find_layout(layout, *formats) #:nodoc:
-        view_paths.find_template(layout.to_s =~ /layouts\// ? layout : "layouts/#{layout}", *formats)
+      def find_layout(layout, format, html_fallback=false) #:nodoc:
+        view_paths.find_template(layout.to_s =~ /layouts\// ? layout : "layouts/#{layout}", format, html_fallback)
+      rescue ActionView::MissingTemplate
+        raise if Mime::Type.lookup_by_extension(format.to_s).html?
       end
 
       def pick_layout(options)
@@ -232,7 +234,7 @@ module ActionController #:nodoc:
           when NilClass, TrueClass
             active_layout if action_has_layout? && candidate_for_layout?(:template => default_template_name)
           else
-            active_layout(layout)
+            active_layout(layout, :html_fallback => true)
           end
         else
           active_layout if action_has_layout? && candidate_for_layout?(options)
@@ -258,7 +260,12 @@ module ActionController #:nodoc:
         template = options[:template] || default_template(options[:action])
         if options.values_at(:text, :xml, :json, :file, :inline, :partial, :nothing, :update).compact.empty?
           begin
-            !self.view_paths.find_template(template, default_template_format).exempt_from_layout?
+            template_object = self.view_paths.find_template(template, default_template_format)
+            # this restores the behavior from 2.2.2, where response.template.template_format was reset
+            # to :html for :js requests with a matching html template.
+            # see v2.2.2, ActionView::Base, lines 328-330
+            @real_format = :html if response.template.template_format == :js && template_object.format == "html"
+            !template_object.exempt_from_layout?
           rescue ActionView::MissingTemplate
             true
           end
@@ -268,7 +275,7 @@ module ActionController #:nodoc:
       end
 
       def default_template_format
-        response.template.template_format
+        @real_format || response.template.template_format
       end
   end
 end