fix: wip

https://forum.plantuml.net/17926/sprite-transparent-only-jar-defined-sprites-are-working
https://github.com/plantuml/plantuml/issues/1448
https://forum.plantuml.net/17932/nwdiag-possible-misbehavior

gradle.properties

@@ -1,4 +1,4 @@
 # Warning, "version" should be the same in gradle.properties and Version.java
 # Any idea anyone how to magically synchronize those :-) ?
-version = 1.2023.9beta2
+version = 1.2023.9beta3
 org.gradle.workers.max = 3

src/net/sourceforge/plantuml/PSystemBuilder.java

@@ -70,6 +70,7 @@ import net.sourceforge.plantuml.eggs.PSystemWelcomeFactory;
 import net.sourceforge.plantuml.emoji.PSystemListEmojiFactory;
 import net.sourceforge.plantuml.error.PSystemError;
 import net.sourceforge.plantuml.error.PSystemErrorUtils;
+import net.sourceforge.plantuml.filesdiagram.FilesDiagramFactory;
 import net.sourceforge.plantuml.flowdiagram.FlowDiagramFactory;
 import net.sourceforge.plantuml.font.PSystemListFontsFactory;
 import net.sourceforge.plantuml.gitlog.GitDiagramFactory;
@@ -101,7 +102,6 @@ import net.sourceforge.plantuml.sudoku.PSystemSudokuFactory;
 import net.sourceforge.plantuml.text.StringLocated;
 import net.sourceforge.plantuml.timingdiagram.TimingDiagramFactory;
 import net.sourceforge.plantuml.utils.Log;
-import net.sourceforge.plantuml.version.License;
 import net.sourceforge.plantuml.version.PSystemLicenseFactory;
 import net.sourceforge.plantuml.version.PSystemVersionFactory;
 import net.sourceforge.plantuml.wbs.WBSDiagramFactory;
@@ -251,6 +251,7 @@ public class PSystemBuilder {
 		factories.add(new JsonDiagramFactory());
 		factories.add(new GitDiagramFactory());
 		// ::comment when __CORE__
+		factories.add(new FilesDiagramFactory());
 		factories.add(new BoardDiagramFactory());
 		// ::done
 		factories.add(new YamlDiagramFactory());

src/net/sourceforge/plantuml/activitydiagram3/ftile/vertical/FtileBox.java

@@ -181,6 +181,8 @@ public class FtileBox extends AbstractFtile {
 
 	@Override
 	public String toString() {
+		if (print == null)
+			return super.toString();
 		return print;
 	}
 

src/net/sourceforge/plantuml/command/CommandFactorySprite.java

@@ -105,9 +105,9 @@ public final class CommandFactorySprite implements SingleMultiFactoryCommand<Wit
 
 				lines = lines.subExtract(1, 1);
 				lines = lines.removeEmptyColumns();
-				if (lines.size() == 0) {
+				if (lines.size() == 0)
 					return CommandExecutionResult.error("No sprite defined.");
-				}
+
 				return executeInternal(system, line0, lines.getLinesAsStringForSprite());
 			}
 
@@ -123,17 +123,17 @@ public final class CommandFactorySprite implements SingleMultiFactoryCommand<Wit
 			final int height = Integer.parseInt(line0.get("DIM", 1));
 			if (line0.get("DIM", 4) == null) {
 				final int nbLevel = Integer.parseInt(line0.get("DIM", 2));
-				if (nbLevel != 4 && nbLevel != 8 && nbLevel != 16) {
+				if (nbLevel != 4 && nbLevel != 8 && nbLevel != 16)
 					return CommandExecutionResult.error("Only 4, 8 or 16 graylevel are allowed.");
-				}
+
 				final SpriteGrayLevel level = SpriteGrayLevel.get(nbLevel);
 				if (line0.get("DIM", 3) == null) {
 					sprite = level.buildSprite(width, height, strings);
 				} else {
 					sprite = level.buildSpriteZ(width, height, concat(strings));
-					if (sprite == null) {
+					if (sprite == null)
 						return CommandExecutionResult.error("Cannot decode sprite.");
-					}
+
 				}
 			} else {
 				sprite = SpriteColorBuilder4096.buildSprite(strings);
@@ -145,9 +145,9 @@ public final class CommandFactorySprite implements SingleMultiFactoryCommand<Wit
 
 	private String concat(final List<String> strings) {
 		final StringBuilder sb = new StringBuilder();
-		for (String s : strings) {
+		for (String s : strings)
 			sb.append(StringUtils.trin(s));
-		}
+
 		return sb.toString();
 	}
 

src/net/sourceforge/plantuml/core/DiagramType.java

@@ -40,7 +40,7 @@ import net.sourceforge.plantuml.utils.StartUtils;
 public enum DiagramType {
     // ::remove folder when __HAXE__
 	UML, BPM, DITAA, DOT, PROJECT, JCCKIT, SALT, FLOW, CREOLE, JUNGLE, CUTE, MATH, LATEX, DEFINITION, GANTT, NW,
-	MINDMAP, WBS, WIRE, JSON, GIT, BOARD, YAML, HCL, EBNF, REGEX, UNKNOWN;
+	MINDMAP, WBS, WIRE, JSON, GIT, BOARD, YAML, HCL, EBNF, REGEX, FILES, UNKNOWN;
 
 	static public DiagramType getTypeFromArobaseStart(String s) {
 		s = s.toLowerCase();
@@ -125,6 +125,9 @@ public enum DiagramType {
 		if (StartUtils.startsWithSymbolAnd("startregex", s))
 			return REGEX;
 
+		if (StartUtils.startsWithSymbolAnd("startfiles", s))
+			return FILES;
+
 		return UNKNOWN;
 	}
 }

src/net/sourceforge/plantuml/filesdiagram/FilesDiagram.java

@@ -0,0 +1,85 @@
+/* ========================================================================
+ * 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.filesdiagram;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Iterator;
+
+import net.sourceforge.plantuml.FileFormatOption;
+import net.sourceforge.plantuml.UmlDiagram;
+import net.sourceforge.plantuml.core.DiagramDescription;
+import net.sourceforge.plantuml.core.ImageData;
+import net.sourceforge.plantuml.core.UmlSource;
+import net.sourceforge.plantuml.klimt.shape.TextBlock;
+import net.sourceforge.plantuml.skin.UmlDiagramType;
+import net.sourceforge.plantuml.text.StringLocated;
+
+public class FilesDiagram extends UmlDiagram {
+
+	private final FilesListing list;
+
+	public FilesDiagram(UmlSource source) {
+		super(source, UmlDiagramType.FILES, null);
+		this.list = new FilesListing(getSkinParam());
+
+		final Iterator<StringLocated> it = source.iterator2();
+		it.next();
+		while (true) {
+			final String line = it.next().getString();
+			if (it.hasNext() == false)
+				break;
+			this.list.add(line);
+		}
+
+	}
+
+	public DiagramDescription getDescription() {
+		return new DiagramDescription("(Files)");
+	}
+
+	@Override
+	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
+			throws IOException {
+
+		return createImageBuilder(fileFormatOption).drawable(getTextBlock()).write(os);
+	}
+
+	@Override
+	protected TextBlock getTextBlock() {
+		return list;
+	}
+
+}

src/net/sourceforge/plantuml/filesdiagram/FilesDiagramFactory.java

@@ -0,0 +1,56 @@
+/* ========================================================================
+ * 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.filesdiagram;
+
+import java.util.Map;
+
+import net.sourceforge.plantuml.command.PSystemAbstractFactory;
+import net.sourceforge.plantuml.core.Diagram;
+import net.sourceforge.plantuml.core.DiagramType;
+import net.sourceforge.plantuml.core.UmlSource;
+
+public class FilesDiagramFactory extends PSystemAbstractFactory {
+
+	public FilesDiagramFactory() {
+		super(DiagramType.FILES);
+	}
+
+	@Override
+	public Diagram createSystem(UmlSource source, Map<String, String> skinParam) {
+		return new FilesDiagram(source);
+	}
+
+}

src/net/sourceforge/plantuml/filesdiagram/FilesListing.java

@@ -0,0 +1,83 @@
+/* ========================================================================
+ * 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.filesdiagram;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import net.sourceforge.plantuml.klimt.UTranslate;
+import net.sourceforge.plantuml.klimt.creole.Display;
+import net.sourceforge.plantuml.klimt.drawing.UGraphic;
+import net.sourceforge.plantuml.klimt.font.FontConfiguration;
+import net.sourceforge.plantuml.klimt.font.StringBounder;
+import net.sourceforge.plantuml.klimt.font.UFont;
+import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
+import net.sourceforge.plantuml.klimt.geom.XDimension2D;
+import net.sourceforge.plantuml.klimt.shape.AbstractTextBlock;
+import net.sourceforge.plantuml.klimt.shape.TextBlock;
+import net.sourceforge.plantuml.style.ISkinParam;
+
+public class FilesListing extends AbstractTextBlock {
+
+	private final ISkinParam skinParam;
+	private final FontConfiguration fontConfiguration = FontConfiguration.blackBlueTrue(UFont.courier(14));
+	private final List<String> tmp = new ArrayList<>();
+
+	public FilesListing(ISkinParam skinParam) {
+		this.skinParam = skinParam;
+	}
+
+	@Override
+	public XDimension2D calculateDimension(StringBounder stringBounder) {
+		return new XDimension2D(200, 200);
+	}
+
+	@Override
+	public void drawU(UGraphic ug) {
+		for (String s : tmp) {
+			final Display display = Display.getWithNewlines("<:1f4c4:>" + s);
+			TextBlock result = display.create(fontConfiguration, HorizontalAlignment.LEFT, skinParam);
+			result.drawU(ug);
+			ug = ug.apply(UTranslate.dy(result.calculateDimension(ug.getStringBounder()).getHeight()));
+		}
+
+	}
+
+	public void add(String line) {
+		if (line.startsWith("/"))
+			tmp.add(line.substring(1));
+	}
+
+}

src/net/sourceforge/plantuml/gitlog/Commit.java

@@ -49,9 +49,9 @@ public class Commit {
 		this.name = name;
 		this.position = position;
 		this.comment = position.getCommentInLine();
-		if (position.matches("* ") == false && position.matches("*-") == false) {
+		if (position.matches("* ") == false && position.matches("*-") == false)
 			throw new IllegalArgumentException();
-		}
+
 	}
 
 	public String getComment() {
@@ -94,15 +94,15 @@ public class Commit {
 	}
 
 	private static void addAbove(List<CursorPosition> result, CursorPosition here) {
-		if (here.move(0, 1).matches("|")) {
+		if (here.move(0, 1).matches("|"))
 			result.add(here.move(0, 1));
-		}
-		if (here.move(1, 1).matches("\\")) {
+
+		if (here.move(1, 1).matches("\\"))
 			result.add(here.move(1, 1));
-		}
-		if (here.move(-1, 1).matches("/")) {
+
+		if (here.move(-1, 1).matches("/"))
 			result.add(here.move(-1, 1));
-		}
+
 	}
 
 	public List<Commit> getAncestors() {

src/net/sourceforge/plantuml/gitlog/CursorPosition.java

@@ -61,43 +61,43 @@ public class CursorPosition {
 	}
 
 	public boolean matches(String prefix) {
-		if (x < 0) {
+		if (x < 0)
 			return false;
-		}
+
 		final String line = getCurrentLine();
-		if (x > line.length()) {
+		if (x > line.length())
 			return false;
-		}
+
 		return line.substring(x).startsWith(prefix);
 	}
 
 	public String getCommentInLine() {
 		final String line = getCurrentLine();
 		final int x = line.indexOf("*");
-		if (x == -1) {
+		if (x == -1)
 			return null;
-		}
+
 		final int y = line.indexOf("(", x);
-		if (y == -1) {
+		if (y == -1)
 			return null;
-		}
+
 		final int z = line.indexOf(")", y);
-		if (z == -1) {
+		if (z == -1)
 			return null;
-		}
+
 		return line.substring(y + 1, z);
 	}
 
 	public static String getCommitNameInLine(String s) {
 		final int x = s.indexOf("*");
-		if (x == -1) {
+		if (x == -1)
 			return null;
-		}
+
 		s = s.replaceAll("[-.*|/\\\\]", "").trim();
 		final int space = s.indexOf(" ");
-		if (space == -1) {
+		if (space == -1)
 			return s;
-		}
+
 		final String name = s.substring(0, space);
 		return name;
 	}
@@ -116,9 +116,9 @@ public class CursorPosition {
 
 	private static CursorPosition getDownFromInternal(CursorPosition current) {
 		while (true) {
-			if (current.matches("* ")) {
+			if (current.matches("* "))
 				return current;
-			}
+
 			if (current.matches("/") && current.move(-2, 0).matches("_|/")) {
 				current = current.move(-2, 0);
 				continue;

src/net/sourceforge/plantuml/gitlog/GNodeBuilder.java

@@ -58,11 +58,9 @@ public class GNodeBuilder {
 			tmp.put(commit.getName(), node);
 		}
 
-		for (Commit commit : allCommits) {
-			for (Commit parent : commit.getAncestors()) {
+		for (Commit commit : allCommits)
+			for (Commit parent : commit.getAncestors())
 				GNode.link(tmp.get(commit.getName()), tmp.get(parent.getName()));
-			}
-		}
 
 		this.all.addAll(tmp.values());
 
@@ -82,9 +80,9 @@ public class GNodeBuilder {
 					break;
 				}
 			}
-			if (changed == false) {
+			if (changed == false)
 				return;
-			}
+
 		}
 	}
 

src/net/sourceforge/plantuml/gitlog/GitCurve.java

@@ -57,25 +57,24 @@ public class GitCurve {
 	public GitCurve(ST_Agedgeinfo_t data, Mirror xMirror) {
 		this.xMirror = xMirror;
 		final ST_splines splines = data.spl;
-		if (splines.size != 1) {
+		if (splines.size != 1)
 			throw new IllegalStateException();
-		}
+
 		final ST_bezier beziers = splines.list.get__(0);
 		for (int i = 0; i < beziers.size; i++) {
 			final XPoint2D pt = getPoint(splines, i);
 			points.add(pt);
 		}
 
-		if (beziers.sp.x == 0 && beziers.sp.y == 0) {
+		if (beziers.sp.x == 0 && beziers.sp.y == 0)
 			sp = null;
-		} else {
+		else
 			sp = new XPoint2D(beziers.sp.x, beziers.sp.y);
-		}
-		if (beziers.ep.x == 0 && beziers.ep.y == 0) {
+
+		if (beziers.ep.x == 0 && beziers.ep.y == 0)
 			ep = null;
-		} else {
+		else
 			ep = new XPoint2D(beziers.ep.x, beziers.ep.y);
-		}
 
 	}
 

src/net/sourceforge/plantuml/gitlog/GitTextArea.java

@@ -55,9 +55,9 @@ public class GitTextArea {
 				final String name = CursorPosition.getCommitNameInLine(s);
 				final int x = s.indexOf("*");
 				assert (name == null) == (x == -1);
-				if (x == -1) {
+				if (x == -1)
 					continue;
-				}
+
 				commits.add(new Commit(name, new CursorPosition(this, x, y)));
 			}
 
@@ -69,18 +69,17 @@ public class GitTextArea {
 	}
 
 	public String getLine(int y) {
-		if (y >= lines.size()) {
+		if (y >= lines.size())
 			return "";
-		}
+
 		return lines.get(y);
 	}
 
 	public Commit getCommitByName(String name) {
-		for (Commit commit : getAllCommits()) {
-			if (commit.getName().equals(name)) {
+		for (Commit commit : getAllCommits())
+			if (commit.getName().equals(name))
 				return commit;
-			}
-		}
+
 		return null;
 	}
 

src/net/sourceforge/plantuml/klimt/color/HColorGradient.java

@@ -63,7 +63,7 @@ public class HColorGradient extends HColor {
 		return color2;
 	}
 
-	public final Color getColor(ColorMapper mapper, double coeff) {
+	public final Color getColor(ColorMapper mapper, double coeff, int alpha) {
 		if (coeff > 1 || coeff < 0)
 			throw new IllegalArgumentException("c=" + coeff);
 
@@ -82,7 +82,7 @@ public class HColorGradient extends HColor {
 		final int green = c1.getGreen() + vGreen;
 		final int blue = c1.getBlue() + vBlue;
 
-		return new Color(red, green, blue);
+		return new Color(red, green, blue, alpha);
 
 	}
 

src/net/sourceforge/plantuml/klimt/sprite/SpriteColor.java

@@ -99,7 +99,7 @@ public class SpriteColor implements Sprite {
 	}
 
 	public UImage toUImage(ColorMapper colorMapper, HColor backcolor, HColor forecolor) {
-		final BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+		final BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
 
 		if (backcolor == null) {
 			backcolor = HColors.WHITE;
@@ -113,7 +113,7 @@ public class SpriteColor implements Sprite {
 				final int localColor = color[line][col];
 				if (localColor == -1) {
 					final double coef = 1.0 * gray[line][col] / (16 - 1);
-					final Color c = gradient.getColor(colorMapper, coef);
+					final Color c = gradient.getColor(colorMapper, coef, 255);
 					im.setRGB(col, line, c.getRGB());
 				} else {
 					im.setRGB(col, line, localColor);

src/net/sourceforge/plantuml/klimt/sprite/SpriteMonochrome.java

@@ -184,26 +184,23 @@ public class SpriteMonochrome implements Sprite {
 		if (color == null || color.isTransparent())
 			color = HColors.BLACK.withDark(HColors.WHITE);
 
-		final BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+		final BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
 		final HColorGradient gradient = HColors.gradient(backcolor, color, '\0');
-		for (int col = 0; col < width; col++) {
-			for (int line = 0; line < height; line++) {
-				final double coef = 1.0 * gray[line][col] / (grayLevel - 1);
-				final Color c = gradient.getColor(colorMapper, coef);
-				im.setRGB(col, line, c.getRGB());
-			}
-		}
-		return new UImage(new PixelImage(im, AffineTransformType.TYPE_BILINEAR));
-	}
+		double maxCoef = 0;
+		for (int col = 0; col < width; col++)
+			for (int line = 0; line < height; line++)
+				maxCoef = Math.max(maxCoef, 1.0 * gray[line][col] / (grayLevel - 1));
 
-	private UImage special(ColorMapper colorMapper, HColorGradient backcolor, HColor color) {
-		final BufferedImage im = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 		for (int col = 0; col < width; col++) {
 			for (int line = 0; line < height; line++) {
-				final HColor backColorLocal = HColors.simple(backcolor.getColor(colorMapper, 1.0 * line / height));
-				final HColorGradient gradient = HColors.gradient(backColorLocal, color, '\0');
-				final double coef = 1.0 * gray[line][col] / (grayLevel - 1);
-				final Color c = gradient.getColor(colorMapper, coef);
+				final int grayValue = gray[line][col];
+				final double coef = 1.0 * grayValue / (grayLevel - 1);
+				final int alpha;
+				if (coef > maxCoef / 4)
+					alpha = 255;
+				else
+					alpha = (int) (255 * (coef * 4 / maxCoef));
+				final Color c = gradient.getColor(colorMapper, coef, alpha);
 				im.setRGB(col, line, c.getRGB());
 			}
 		}

src/net/sourceforge/plantuml/nwdiag/NwDiagram.java

@@ -118,6 +118,8 @@ public class NwDiagram extends UmlDiagram {
 	@Override
 	public void makeDiagramReady() {
 		super.makeDiagramReady();
+		if (networks.size() == 0)
+			createNetwork("").goInvisible();
 		for (NServer server : servers.values()) {
 			server.connectMeIfAlone(networks.get(0));
 			playField.addInPlayfield(server.getBar());
@@ -179,11 +181,26 @@ public class NwDiagram extends UmlDiagram {
 				return veryFirstLink(name1, name2);
 			return CommandExecutionResult.error("what about " + name1);
 		}
+
+		if (server1.isAlone()) {
+			if (networks.size() == 0)
+				createNetwork("").goInvisible();
+			server1.connectMeIfAlone(networks.get(0));
+		}
+
+		final Network tmp1 = server1.getMainNetworkNext();
+		final Network justAfter = justAfter(tmp1);
+
+		final Network network;
+		if (justAfter != null && justAfter.isVisible() == false)
+			network = justAfter;
+		else
+			network = createNetwork("");
+
 		NServer server2 = servers.get(name2);
-		final Network network = createNetwork("");
+
 		network.goInvisible();
 		if (server2 == null) {
-			// server2 = NServer.create(name2, getSkinParam());
 			server2 = new NServer(name2, server1.getBar(), getSkinParam());
 			servers.put(name2, server2);
 			server1.connectTo(network, "");
@@ -199,6 +216,13 @@ public class NwDiagram extends UmlDiagram {
 		return CommandExecutionResult.ok();
 	}
 
+	private Network justAfter(Network n) {
+		final int x = networks.indexOf(n);
+		if (x != -1 && x < networks.size() - 1)
+			return networks.get(x + 1);
+		return null;
+	}
+
 	private CommandExecutionResult veryFirstLink(String name1, String name2) {
 		Network network = createNetwork(name1);
 		NServer server2 = NServer.create(name2, getSkinParam());
@@ -208,45 +232,6 @@ public class NwDiagram extends UmlDiagram {
 		return CommandExecutionResult.ok();
 	}
 
-	private CommandExecutionResult linkOld(String name1, String name2) {
-		if (initDone == false)
-			return errorNoInit();
-
-		String existingAddress = "";
-		final NServer server2;
-		Network created = null;
-		if (currentNetwork() == null && networks.size() == 0) {
-			created = createNetwork(name1);
-			server2 = NServer.create(name2, getSkinParam());
-		} else {
-			final NServer server1 = servers.get(name1);
-			final NServer previous2 = servers.get(name2);
-			if (previous2 != null)
-				existingAddress = previous2.someAddress();
-			created = createNetwork("");
-			created.goInvisible();
-			if (server1 != null) {
-				final Network someNetwork = server1.someNetwork();
-				if (someNetwork != null && someNetwork.isVisible() == false && someNetwork.getUp() == null) {
-					final String tmp = server1.someAddress();
-					server1.blankSomeAddress();
-					server1.connectTo(created, tmp);
-				} else {
-					server1.connectTo(created, "");
-				}
-			}
-
-			server2 = new NServer(name2, server1.getBar(), getSkinParam());
-		}
-		servers.put(name2, server2);
-		if (created == null)
-			server2.connectTo(currentNetwork(), existingAddress);
-		else
-			server2.connectTo(created, existingAddress);
-		playField.addInPlayfield(server2.getBar());
-		return CommandExecutionResult.ok();
-	}
-
 	public CommandExecutionResult addElement(String name, String definition) {
 		if (initDone == false)
 			return errorNoInit();
@@ -269,6 +254,13 @@ public class NwDiagram extends UmlDiagram {
 			}
 		}
 
+		if (networks.size() == 0 || currentNetwork() == null) {
+			server.updateProperties(props);
+			server.learnThisAddress(props.get("address"));
+			return CommandExecutionResult.ok();
+
+		}
+
 		if (networks.size() == 0) {
 			final Network network = createNetwork("");
 			network.goInvisible();
@@ -291,46 +283,6 @@ public class NwDiagram extends UmlDiagram {
 		return CommandExecutionResult.ok();
 	}
 
-	private CommandExecutionResult addElementOld(String name, String definition) {
-		if (initDone == false)
-			return errorNoInit();
-
-		if (currentGroup() != null) {
-			if (alreadyInSomeGroup(name))
-				return CommandExecutionResult.error("Element already in another group.");
-
-			currentGroup().addName(name);
-		}
-
-		NServer server = null;
-		Network created = null;
-		if (currentNetwork() == null) {
-			if (currentGroup() != null)
-				return CommandExecutionResult.ok();
-
-			assert currentGroup() == null;
-			created = createNetwork("");
-			created.goInvisible();
-			server = NServer.create(name, getSkinParam());
-			servers.put(name, server);
-			server.doNotPrintFirstLink();
-		} else {
-			server = servers.get(name);
-			if (server == null) {
-				server = NServer.create(name, getSkinParam());
-				servers.put(name, server);
-			}
-		}
-		final Map<String, String> props = toSet(definition);
-		if (created == null)
-			server.connectTo(currentNetwork(), props.get("address"));
-		else
-			server.connectTo(created, props.get("address"));
-		server.updateProperties(props);
-		playField.addInPlayfield(server.getBar());
-		return CommandExecutionResult.ok();
-	}
-
 	private boolean alreadyInSomeGroup(String name) {
 		for (NwGroup g : groups)
 			if (g.names().contains(name))

src/net/sourceforge/plantuml/nwdiag/core/NServer.java

@@ -79,13 +79,17 @@ public class NServer {
 	}
 
 	public void connectMeIfAlone(Network network) {
-		if (connections.size() == 0) {
+		if (isAlone()) {
 			connectTo(network, "");
 			if (network.isVisible() == false)
 				this.doNotPrintFirstLink();
 		}
 	}
 
+	public boolean isAlone() {
+		return connections.size() == 0;
+	}
+
 	public String someAddress() {
 		if (connections.size() > 0 && connections.values().iterator().next().length() > 0)
 			return connections.values().iterator().next();

src/net/sourceforge/plantuml/skin/UmlDiagramType.java

@@ -39,7 +39,7 @@ import net.sourceforge.plantuml.style.SName;
 
 public enum UmlDiagramType {
 	SEQUENCE, STATE, CLASS, OBJECT, ACTIVITY, DESCRIPTION, COMPOSITE, FLOW, TIMING, BPM, NWDIAG, MINDMAP, WBS, WIRE,
-	HELP, GANTT, SALT, JSON, GIT, BOARD, YAML, HCL, EBNF, REGEX;
+	HELP, GANTT, SALT, JSON, GIT, BOARD, YAML, HCL, EBNF, REGEX, FILES;
 
 	public SName getStyleName() {
 		if (this == SEQUENCE)

src/net/sourceforge/plantuml/version/Version.java

@@ -46,7 +46,7 @@ public class Version {
 
 	// Warning, "version" should be the same in gradle.properties and Version.java
 	// Any idea anyone how to magically synchronize those :-) ?
-	private static final String version = "1.2023.9beta2";
+	private static final String version = "1.2023.9beta3";
 
 	public static String versionString() {
 		return version;

test/net/sourceforge/plantuml/PipeTest.java

@@ -159,8 +159,8 @@ class PipeTest {
 		// no links/invalid input => no pipemap to output (no error as of
 		// https://forum.plantuml.net/10049/2019-pipemap-diagrams-containing-links-give-zero-exit-code
 		// )
-		l.add(TestCase.of("-pipemap", "@startuml\na->b\n@enduml", "<map id=\"plantuml_map\" name=\"plantuml_map\">\n</map>\n\n", Verification.EXACT, false, false));
-		l.add(TestCase.of("-pipemap", "@startuml\na\n@enduml", "<map id=\"plantuml_map\" name=\"plantuml_map\">\n</map>\n\n", Verification.EXACT, false, false));
+		l.add(TestCase.of("-pipemap", "@startuml\na->b\n@enduml", "\n", Verification.EXACT, false, false));
+		l.add(TestCase.of("-pipemap", "@startuml\na\n@enduml", "\n", Verification.EXACT, false, false));
 
 		return l;
 	}