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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 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.vizjs;

import java.io.File;
import java.io.OutputStream;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadFactory;

import net.sourceforge.plantuml.dot.ExeState;
import net.sourceforge.plantuml.dot.Graphviz;
import net.sourceforge.plantuml.dot.GraphvizVersion;
import net.sourceforge.plantuml.dot.ProcessState;
import net.sourceforge.plantuml.log.Logme;

public class GraphvizJs implements Graphviz {
    // ::remove folder when __HAXE__
	// ::remove folder when __CORE__

	private final static ExecutorService executorService = Executors
			.newSingleThreadScheduledExecutor(new ThreadFactory() {
				public Thread newThread(Runnable runnable) {
					return new JsThread(runnable);
				}
			});

	static class JsThread extends Thread {

		private final Runnable runnable;
		private VizJsEngine engine;

		public JsThread(Runnable runnable) {
			this.runnable = runnable;
		}

		@Override
		public void run() {
			if (engine == null) {
				try {
					this.engine = new VizJsEngine();
				} catch (Exception e) {
					Logme.error(e);
				}
			}
			runnable.run();
		}

	}

	private final String dotString;

	public GraphvizJs(String dotString) {
		this.dotString = dotString;
	}

	public ProcessState createFile3(OutputStream os) {
		try {
			final String svg = submitJob().get();
			os.write(svg.getBytes());
			return ProcessState.TERMINATED_OK();
		} catch (Exception e) {
			Logme.error(e);
			throw new GraphvizJsRuntimeException(e);
		}
	}

	private Future submitJob() {
		return executorService.submit(new Callable() {
			public String call() throws Exception {
				final JsThread th = (JsThread) Thread.currentThread();
				final VizJsEngine engine = th.engine;
				return engine.execute(dotString);
			}
		});
	}

	public File getDotExe() {
		return null;
	}

	public String dotVersion() {
		return "VizJs";
	}

	public ExeState getExeState() {
		return ExeState.OK;
	}

	public static GraphvizVersion getGraphvizVersion(final boolean modeSafe) {
		return new GraphvizVersion() {
			public boolean useShieldForQuantifier() {
				return true;
			}

			public boolean useProtectionWhenThereALinkFromOrToGroup() {
				return true;
			}

			public boolean useXLabelInsteadOfLabel() {
				return modeSafe;
			}

			public boolean isVizjs() {
				return true;
			}

			public boolean ignoreHorizontalLinks() {
				return false;
			}
		};
	}

	public boolean graphviz244onWindows() {
		return false;
	}

}