action_merge.C

// action_merge.C
// 
// Copyright 1996-2001 Per Abrahamsen and Søren Hansen
// Copyright 2000-2001 KVL.
//
// This file is part of Daisy.
// 
// Daisy is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser Public License as published by
// the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
// 
// Daisy 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 Lesser Public License for more details.
// 
// You should have received a copy of the GNU Lesser Public License
// along with Daisy; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#define BUILD_DLL

#include "action.h"
#include "block.h"
#include "daisy.h"
#include "field.h"
#include "librarian.h"

struct ActionMerge : public Action
{
  const symbol combine;
  const symbol remove;

  void doIt (Daisy& daisy, const Scope&, Treelog& out)
  {
    out.message ("Merging " + remove + " into " + combine);
    daisy.field->merge (combine, remove);
  }
  
  ActionMerge (Block& al)
    : Action (al),
      combine (al.identifier ("combine")), 
      remove (al.identifier ("remove"))
  { }
};

static struct ActionMergeSyntax : DeclareModel
{
  Model* make (Block& al) const
    { return new ActionMerge (al); }
  ActionMergeSyntax ()
    : DeclareModel (Action::component, "merge", "\
Merge two columns.  After the merge, only the first column will remain,\n\
but its state will be a average of the the columns, weighted after size.")
  { }
  void load_frame (Frame& frame) const
  { 
    frame.add ("combine", Syntax::String, Syntax::Const,
               "Column to merge into.");
    frame.add ("remove", Syntax::String, Syntax::Const,
               "Column to remove after merge.");
    frame.order ("combine", "remove");
  }
} ActionMerge_syntax;