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PlantUML is a component that allows to quickly write diagrams from text.

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// 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 General Public License V2.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 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 GPL v2 license.
 *
 * The generated images can then be used without any reference to the GPL v2 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.dot;

import static java.nio.charset.StandardCharsets.UTF_8;

import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import net.atmp.CucaDiagram;
import net.sourceforge.plantuml.FileFormat;
import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.EntityPortion;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.asciiart.BasicCharArea;
import net.sourceforge.plantuml.cucadiagram.PortionShower;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.drawing.txt.UGraphicTxt;
import net.sourceforge.plantuml.klimt.geom.XCubicCurve2D;
import net.sourceforge.plantuml.klimt.geom.XPoint2D;
import net.sourceforge.plantuml.klimt.shape.DotPath;
import net.sourceforge.plantuml.posimo.Block;
import net.sourceforge.plantuml.posimo.Cluster;
import net.sourceforge.plantuml.posimo.GraphvizSolverB;
import net.sourceforge.plantuml.posimo.Path;
import net.sourceforge.plantuml.security.SFile;
import net.sourceforge.plantuml.security.SecurityUtils;
import net.sourceforge.plantuml.text.BackSlash;

public final class CucaDiagramTxtMaker {
	// ::remove file when __CORE__

	// private final CucaDiagram diagram;
	private final FileFormat fileFormat;
	private final UGraphicTxt globalUg = new UGraphicTxt();
	private final PortionShower portionShower;

	private static double getXPixelPerChar() {
		return 5;
	}

	private static double getYPixelPerChar() {
		return 10;
	}

	private boolean showMember(Entity entity) {
		final boolean showMethods = portionShower.showPortion(EntityPortion.METHOD, entity);
		final boolean showFields = portionShower.showPortion(EntityPortion.FIELD, entity);
		return showMethods || showFields;
	}

	public CucaDiagramTxtMaker(CucaDiagram diagram, FileFormat fileFormat) throws IOException {
		this.fileFormat = fileFormat;
		this.portionShower = diagram;

		final Cluster root = new Cluster(null, 0, 0);
		int uid = 0;

		final Map blocks = new HashMap();

		for (Entity ent : diagram.leafs()) {
			// printClass(ent);
			// ug.translate(0, getHeight(ent) + 1);
			final double width = getWidth(ent) * getXPixelPerChar();
			final double height = getHeight(ent) * getYPixelPerChar();
			final Block b = new Block(uid++, width, height, null);
			root.addBloc(b);
			blocks.put(ent, b);
		}

		final GraphvizSolverB solver = new GraphvizSolverB();

		final Collection paths = new ArrayList<>();
		for (Link link : diagram.getLinks()) {
			final Block b1 = blocks.get(link.getEntity1());
			final Block b2 = blocks.get(link.getEntity2());
			paths.add(new Path(b1, b2, null, link.getLength(), link.isInvis()));
		}
		solver.solve(root, paths);
		for (Path p : paths) {
			if (p.isInvis())
				continue;

			drawDotPath(p.getDotPath(), globalUg.getCharArea(), getXPixelPerChar(), getYPixelPerChar());
		}
		for (Entity ent : diagram.leafs()) {
			final Block b = blocks.get(ent);
			final XPoint2D p = b.getPosition();
			printClass(ent, (UGraphicTxt) globalUg
					.apply(new UTranslate(p.getX() / getXPixelPerChar(), p.getY() / getYPixelPerChar())));
		}

	}

	private void drawDotPath(DotPath dotPath, BasicCharArea area, double pixelXPerChar, double pixelYPerChar) {
		for (XCubicCurve2D bez : dotPath.getBeziers())
			if (bez.x1 == bez.x2)
				area.drawVLine('|', (int) (bez.x1 / pixelXPerChar), (int) (bez.y1 / pixelYPerChar),
						(int) (bez.y2 / pixelYPerChar));
			else if (bez.y1 == bez.y2)
				area.drawHLine('-', (int) (bez.y1 / pixelYPerChar), (int) (bez.x1 / pixelXPerChar),
						(int) (bez.x2 / pixelXPerChar));

	}

	private void printClass(final Entity ent, UGraphicTxt ug) {
		final int w = getWidth(ent);
		final int h = getHeight(ent);
		ug.getCharArea().drawBoxSimple(0, 0, w, h);
		ug.getCharArea().drawStringsLRSimple(ent.getDisplay().asList(), 1, 1);
		if (showMember(ent)) {
			int y = 2;
			ug.getCharArea().drawHLine('-', y, 1, w - 1);
			y++;
			for (CharSequence att : ent.getBodier().getRawBody()) {
				final List disp = BackSlash.getWithNewlines(att.toString());
				ug.getCharArea().drawStringsLRSimple(disp, 1, y);
				y += StringUtils.getHeight(disp);
			}
//			for (Member att : ent.getBodier().getFieldsToDisplay()) {
//				final List disp = BackSlash.getWithNewlines(att.getDisplay(true));
//				ug.getCharArea().drawStringsLR(disp, 1, y);
//				y += StringUtils.getHeight(disp);
//			}
//			ug.getCharArea().drawHLine('-', y, 1, w - 1);
//			y++;
//			for (Member att : ent.getBodier().getMethodsToDisplay()) {
//				final List disp = BackSlash.getWithNewlines(att.getDisplay(true));
//				ug.getCharArea().drawStringsLR(disp, 1, y);
//				y += StringUtils.getHeight(disp);
//			}
		}
	}

	public List createFiles(SFile suggestedFile) throws IOException {
		if (fileFormat == FileFormat.UTXT)
			globalUg.getCharArea().print(suggestedFile.createPrintStream(UTF_8));
		else
			globalUg.getCharArea().print(suggestedFile.createPrintStream());

		return Collections.singletonList(suggestedFile);
	}

	private int getHeight(Entity entity) {
		int result = StringUtils.getHeight(entity.getDisplay());
		if (showMember(entity)) {
			for (CharSequence att : entity.getBodier().getRawBody())
				result += StringUtils.getHeight(Display.getWithNewlines(att.toString()));

//			for (Member att : entity.getBodier().getMethodsToDisplay()) {
//				result += StringUtils.getHeight(Display.getWithNewlines(att.getDisplay(true)));
//			}
//			result++;
//			for (Member att : entity.getBodier().getFieldsToDisplay()) {
//				result += StringUtils.getHeight(Display.getWithNewlines(att.getDisplay(true)));
//			}
//			result++;
		}
		return result + 3;
	}

	private int getWidth(Entity entity) {
		int result = StringUtils.getWcWidth(entity.getDisplay());
		if (showMember(entity)) {
			for (CharSequence att : entity.getBodier().getRawBody()) {
				final int w = StringUtils.getWcWidth(Display.getWithNewlines(att.toString()));
				if (w > result)
					result = w;

			}
//			for (Member att : entity.getBodier().getMethodsToDisplay()) {
//			final int w = StringUtils.getWcWidth(Display.getWithNewlines(att.getDisplay(true)));
//			if (w > result) {
//				result = w;
//			}
//		}
//			for (Member att : entity.getBodier().getFieldsToDisplay()) {
//				final int w = StringUtils.getWcWidth(Display.getWithNewlines(att.getDisplay(true)));
//				if (w > result) {
//					result = w;
//				}
//			}
		}
		return result + 2;
	}

	public void createFiles(OutputStream os, int index) {
		globalUg.getCharArea().print(SecurityUtils.createPrintStream(os));
	}

}




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