refactor operator-widget to let it do what it was intendet to

lib/widget/filters/operators.rb

@@ -1,28 +1,24 @@
 class Widget::Filters::Operators < Widget::Filters::Base
   def render
     content_tag :td, :width => 100 do
-      if filter_class.available_operators.count > 1
-        content_tag :select, :class => "select-small filters-select filter_operator",
+      hide_select_box = filter_class.available_operators.count == 1
+      options = {:class => "select-small filters-select filter_operator",
                  :style => "vertical-align: top", # FIXME: put into CSS
                  :id => "operators[#{filter_class.underscore_name}]",
                  :name => "operators[#{filter_class.underscore_name}]",
-                             :"data-filter-name" => filter_class.underscore_name do
+                 :"data-filter-name" => filter_class.underscore_name }
+      options.merge! :style => "display: none" if hide_select_box
+      select_box = content_tag :select, options do
         filter_class.available_operators.collect do |o|
           opts = {:value => h(o.to_s), :"data-arity" => o.arity}
           opts[:selected] = "selected" if filter.operator.to_s == o.to_s
           content_tag(:option, opts) { h(l(o.label)) }
         end.join.html_safe
       end
-      else
-        content_tag :select, :class => "select-small filters-select filter_operator",
-                             :style => "display: none", # FIXME: put into CSS
-                             :id => "operators[#{filter_class.underscore_name}]",
-                             :name => "operators[#{filter_class.underscore_name}]",
-                             :"data-filter-name" => filter_class.underscore_name
-        content_tag :label do
+      label = content_tag :label do
         l(filter_class.available_operators.first.label)
       end
-      end
+      hide_select_box ? select_box + label : select_box
     end
   end
 end