Fix feed link for pushState loaded history page

app/assets/javascripts/index.js

@@ -42,10 +42,22 @@
         clearTimeout(loaderTimeout);
         $('#flash').empty();
         $('#sidebar_loader').hide();
-        $('#sidebar_content').html(xhr.responseText);
+
+        var content = $(xhr.responseText);
+
         if (xhr.getResponseHeader('X-Page-Title')) {
           document.title = xhr.getResponseHeader('X-Page-Title');
         }
+
+        $('head')
+          .find('link[type="application/atom+xml"]')
+          .remove();
+
+        $('head')
+          .append(content.filter('link[type="application/atom+xml"]'));
+
+        $('#sidebar_content').html(content.not('link[type="application/atom+xml"]'));
+
         if (callback) {
           callback();
         }

app/controllers/application_controller.rb

@@ -419,7 +419,7 @@ class ApplicationController < ActionController::Base
   end
 
   def map_layout
-    request.xhr? ? false : 'map'
+    request.xhr? ? 'xhr' : 'map'
   end
 
   def preferred_editor

app/views/changeset/history.html.erb

@@ -1,6 +1,6 @@
-<% content_for :head do -%>
+<% content_for :auto_discovery_link_tag do -%>
   <% unless params[:friends] or params[:nearby] -%>
-    <%= auto_discovery_link_tag :atom, params.merge({ :max_id => nil, :action => :feed }) %>
+    <%= auto_discovery_link_tag :atom, params.merge(:max_id => nil, :xhr => nil, :action => :feed) %>
   <% end -%>
 <% end -%>
 

app/views/layouts/_head.html.erb

@@ -26,6 +26,7 @@
   <% end -%>  
   <%= style_rules %>
   <%= yield :head %>
+  <%= yield :auto_discovery_link_tag %>
   <%= csrf_meta_tag %>
   <script type="text/javascript">
     I18n.defaultLocale = "<%= I18n.default_locale %>";

app/views/layouts/xhr.html.erb

@@ -0,0 +1,2 @@
+<%= content_for :auto_discovery_link_tag %>
+<%= yield %>