/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/paypal
 * 
 * This file is part of PlantUML.
 *
 * PlantUML 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.
 *
 * PlantUML 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 General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.salt.factory;

import net.sourceforge.plantuml.salt.DataSource;
import net.sourceforge.plantuml.salt.Positionner2;
import net.sourceforge.plantuml.salt.SaltDictionary;
import net.sourceforge.plantuml.salt.Terminated;
import net.sourceforge.plantuml.salt.element.Element;
import net.sourceforge.plantuml.salt.element.ElementPyramidScrolled;

public class ElementFactoryScroll extends AbstractElementFactoryComplex {

	public ElementFactoryScroll(DataSource dataSource, SaltDictionary dictionary) {
		super(dataSource, dictionary);
	}

	public Terminated<Element> create() {
		if (ready() == false) {
			throw new IllegalStateException();
		}
		final Terminated<String> tmp = getDataSource().next();
		final String header = tmp.getElement();
		assert header.startsWith("{");

		final Positionner2 positionner = new Positionner2();

		while (getDataSource().peek(0).getElement().equals("}") == false) {
			final Terminated<Element> next = getNextElement();
			positionner.add(next);
		}
		final Terminated<String> next = getDataSource().next();
		return new Terminated<Element>(
				new ElementPyramidScrolled(positionner, getDictionary(), ScrollStrategy.fromDesc(header)),
				next.getTerminator());
	}

	public boolean ready() {
		final String text = getDataSource().peek(0).getElement();
		if (text.equals("{S") || text.equals("{S-") || text.equals("{SI")) {
			return true;
		}
		return false;
	}
}
