/**********************************************************************

   Audacity - A Digital Audio Editor
   Copyright 1999-2009 Audacity Team
   License: wxWidgets

   Dan Horgan

******************************************************************//**

\file CommandDirectory.h
\brief Contains declarations for CommandDirectory class

\class CommandDirectory
\brief Allows registration and lookup (by name) of command types.

A singleton. This fulfills a similar purpose to CommandManager, but for general
Commands rather than menu items. Eventually they could be unified but for now
they are kept separate to make things simpler.

*//*******************************************************************/

#ifndef __COMMANDDIRECTORY__
#define __COMMANDDIRECTORY__

#include "CommandType.h"

class CommandOutputTargets;

class AUDACITY_DLL_API CommandDirectory
{
private:
   static std::unique_ptr<CommandDirectory> mInstance;
   static CommandMap &sCmdMap();

   static void AddCommand(std::unique_ptr<OldStyleCommandType> type);
public:
   /// Register a type of command with the directory with a statically
   /// constructed instance of this class.
   struct RegisterType{
     RegisterType( std::unique_ptr<OldStyleCommandType> type )
        { AddCommand( std::move( type ) ); }
   };

   ~CommandDirectory();

   /// If a command with the given name has been registered in the directory,
   /// return a pointer to the factory for commands of that type.
   /// Otherwise return NULL.
   OldStyleCommandType *LookUp(const wxString &cmdName) const;

   /// Get a pointer to the singleton instance
   static CommandDirectory *Get();

private:
   CommandDirectory();
};

#endif /* End of include guard: __COMMANDDIRECTORY__ */
