/*=========================================================================

  Program:   CMake - Cross-Platform Makefile Generator
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef cmListCommand_h
#define cmListCommand_h

#include "cmCommand.h"

/** \class cmListCommand
 * \brief Common list operations
 *
 */
class cmListCommand : public cmCommand
{
public:
  /**
   * This is a virtual constructor for the command.
   */
  virtual cmCommand* Clone() 
    {
    return new cmListCommand;
    }

  /**
   * This is called when the command is first encountered in
   * the CMakeLists.txt file.
   */
  virtual bool InitialPass(std::vector<std::string> const& args);

  /**
   * This determines if the command is invoked when in script mode.
   */
  virtual bool IsScriptable() { return true; }

  /**
   * The name of the command as specified in CMakeList.txt.
   */
  virtual const char* GetName() { return "LIST";}

  /**
   * Succinct documentation.
   */
  virtual const char* GetTerseDocumentation() 
    {
    return "List operations.";
    }
  
  /**
   * More documentation.
   */
  virtual const char* GetFullDocumentation()
    {
    return
      "  LIST(LENGTH <list> <output variable>)\n"
      "  LIST(GET <list> <element index> [<element index> ...] "
      "<output variable>)\n"
      "  LIST(APPEND <list> <element> [<element> ...])\n"
      "  LIST(INSERT <list> <element_index> <element> [<element> ...])\n"
      "  LIST(REMOVE_ITEM <list> <value> [<value> ...])\n"
      "  LIST(REMOVE_AT <list> <index> [<index> ...])\n"
      "  LIST(SORT <list>)\n"
      "  LIST(REVERSE <list>)\n"
      "LENGTH will return a given list's length.\n"
      "GET will return list of elements specified by indices from the list.\n"
      "APPEND will append elements to the list.\n"
      "INSERT will insert elements to the list to the specified location.\n"
      "When specifying an index, negative value corresponds to index from the"
      " end of the list.\n"
      "REMOVE_AT and REMOVE_ITEM will remove item from the list. The "
      "difference is that REMOVE_ITEM will remove the given items, while "
      "REMOVE_AT will remove the item at the given indices.\n"
      ;
    }
  
  cmTypeMacro(cmListCommand, cmCommand);
protected:
  bool HandleLengthCommand(std::vector<std::string> const& args);
  bool HandleGetCommand(std::vector<std::string> const& args);
  bool HandleAppendCommand(std::vector<std::string> const& args);
  bool HandleInsertCommand(std::vector<std::string> const& args);
  bool HandleRemoveAtCommand(std::vector<std::string> const& args);
  bool HandleRemoveItemCommand(std::vector<std::string> const& args);
  bool HandleSortCommand(std::vector<std::string> const& args);
  bool HandleReverseCommand(std::vector<std::string> const& args);


  bool GetList(std::vector<std::string>& list, const char* var);
  bool GetListString(std::string& listString, const char* var);
};


#endif