--- /dev/null
+// Copyright (C) 2007, 2008, 2009 Ben Asselstine
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+// 02110-1301, USA.
+
+#ifndef PORTLIST_H
+#define PORTLIST_H
+
+#include <sigc++/trackable.h>
+#include "LocationList.h"
+
+class XML_Helper;
+class Port;
+
+//! A list of the Port objects on the game map.
+/**
+ * The portlist keeps track of the ports located on the game map. It
+ * is implemented as a singleton because many classes use it for looking up
+ * ports.
+ */
+class Portlist : public LocationList<Port*>, public sigc::trackable
+{
+ public:
+ //! The xml tag of this object in a saved-game file.
+ static std::string d_tag;
+
+ // Methods that operate on the class data but do not modify the class.
+
+ //! Saves the list of Port objects to the opened saved-game file.
+ bool save(XML_Helper* helper) const;
+
+
+ // Static Methods
+
+ //! Return the singleton instance. Create a new one if needed.
+ static Portlist* getInstance();
+
+ //! Load the singleton instance from the opened saved-game file.
+ static Portlist* getInstance(XML_Helper* helper);
+
+ //! Explicitly delete the singleton instance.
+ static void deleteInstance();
+
+ protected:
+
+ //! Default constructor.
+ Portlist();
+
+ //! Loading constructor.
+ /**
+ * Load the list of Port objects from the opened saved-game file.
+ *
+ * @param helper The opened saved-game file to load Port objects from.
+ */
+ Portlist(XML_Helper* helper);
+
+ private:
+ //! Callback for loading Port objects into the list of ports.
+ bool load(std::string tag, XML_Helper* helper);
+
+ // DATA
+
+ //! A static pointer for the singleton instance.
+ static Portlist* s_instance;
+};
+
+#endif