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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      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/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this LGPL license.
 *
 * The generated images can then be used without any reference to the LGPL license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.klimt.creole.atom;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.salt.element.Skeleton2;

public class AtomTree extends AbstractAtom implements Atom {

	private final HColor lineColor;
	private final List cells = new ArrayList<>();
	private final Map levels = new HashMap();
	private final double margin = 2;

	public AtomTree(HColor lineColor) {
		this.lineColor = lineColor;
	}

	public XDimension2D calculateDimension(StringBounder stringBounder) {
		final Skeleton2 skeleton = new Skeleton2();
		double width = 0;
		double height = 0;
		for (Atom cell : cells) {
			final XDimension2D dim = cell.calculateDimension(stringBounder);
			height += dim.getHeight();
			final int level = getLevel(cell);
			width = Math.max(width, skeleton.getXEndForLevel(level) + margin + dim.getWidth());
		}
		return new XDimension2D(width, height);
	}

	public double getStartingAltitude(StringBounder stringBounder) {
		return 0;
	}

	public void drawU(final UGraphic ugInit) {
		final Skeleton2 skeleton = new Skeleton2();
		double y = 0;
		UGraphic ug = ugInit;
		for (Atom cell : cells) {
			final int level = getLevel(cell);
			cell.drawU(ug.apply(UTranslate.dx(margin + skeleton.getXEndForLevel(level))));
			final XDimension2D dim = cell.calculateDimension(ug.getStringBounder());
			skeleton.add(level, y + dim.getHeight() / 2);
			ug = ug.apply(UTranslate.dy(dim.getHeight()));
			y += dim.getHeight();
		}
		skeleton.draw(ugInit.apply(this.lineColor));
	}

	private int getLevel(Atom atom) {
		return levels.get(atom);
	}

	public void addCell(Atom cell, int level) {
		this.cells.add(cell);
		this.levels.put(cell, level);
	}

}