Merged r6163, r6171, r6172, r6174 from trunk.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/1.2-stable@6175 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/query.rb

@@ -165,6 +165,11 @@ class Query < ActiveRecord::Base
           ["o", "c", "!*", "*", "t", "w"].include? operator_for(field)
     end if filters
   end
+  
+  # Returns true if the query is visible to +user+ or the current user.
+  def visible?(user=User.current)
+    self.is_public? || self.user_id == user.id
+  end
 
   def editable_by?(user)
     return false unless user