/* GNU Prolog for Java
 * Copyright (C) 1997-1999  Constantine Plotnikov
 * Copyright (C) 2009       Michiel Hendriks
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * This library 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 Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA. The text of license can be also found 
 * at http://www.gnu.org/copyleft/lgpl.html
 */
package gnu.prolog.vm.buildins.dialogs;

import gnu.prolog.term.AtomTerm;
import gnu.prolog.term.Term;
import gnu.prolog.vm.Interpreter;
import gnu.prolog.vm.PrologException;

import javax.swing.JOptionPane;
import javax.swing.UIManager;

/**
 * 
 * @author Michiel Hendriks
 */
public class Predicate_prompt extends Predicate_dialog
{
	public Predicate_prompt()
	{}

	@Override
	public int execute(Interpreter interpreter, boolean backtrackMode, Term[] args) throws PrologException
	{
		DialogOptions options;
		if (args.length >= 2)
		{
			options = processOptions(args[1]);
		}
		else
		{
			options = new DialogOptions();
		}
		if (options.title == null)
		{
			options.title = UIManager.getString("OptionPane.inputDialogTitle", null);
		}
		Object result = JOptionPane.showInputDialog(null, options.message, options.title, options.messageType, null, null,
				options.selection);
		if (result instanceof String)
		{
			return interpreter.unify(args[0], AtomTerm.get((String) result));
		}
		return FAIL;
	}
}
