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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!)
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 *
 *
 * 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.math;

import java.awt.Color;
import java.io.IOException;
import java.io.OutputStream;

import net.sourceforge.plantuml.AbstractPSystem;
import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.core.DiagramDescription;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.core.UmlSource;
import net.sourceforge.plantuml.klimt.color.ColorMapper;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColorSet;
import net.sourceforge.plantuml.log.Logme;

public class PSystemLatex extends AbstractPSystem {

	private String latex = "";
	private float scale = 1;
	private Color color = Color.BLACK;
	private Color backColor = Color.WHITE;

	public PSystemLatex(UmlSource source) {
		super(source);
	}

	public DiagramDescription getDescription() {
		return new DiagramDescription("(Latex)");
	}

	@Override
	final protected ImageData exportDiagramNow(OutputStream os, int num, FileFormatOption fileFormat)
			throws IOException {
		final ScientificEquationSafe asciiMath = ScientificEquationSafe.fromLatex(latex);
		return asciiMath.export(os, fileFormat, scale, color, backColor);
	}

	public void doCommandLine(String line) {
		final String lineLower = StringUtils.trin(StringUtils.goLowerCase(line));
		final String colorParam = "color ";
		final String backParam = "backgroundcolor ";
		if (lineLower.startsWith(colorParam)) {
			final Color col3 = getColor(line.substring(colorParam.length()));
			if (col3 != null) {
				color = col3;
			}
		} else if (lineLower.startsWith(backParam)) {
			final Color col3 = getColor(line.substring(backParam.length()));
			if (col3 != null) {
				backColor = col3;
			}
		} else if (lineLower.startsWith("scale ")) {
			final String value = line.substring("scale ".length());
			try {
				final float scale1 = Float.parseFloat(value);
				if (scale1 > 0) {
					scale = scale1;
				}
			} catch (Exception e) {
				Logme.error(e);
			}
		} else if (lineLower.startsWith("dpi ")) {
			final String value = line.substring("dpi ".length());
			try {
				final float dpi1 = Float.parseFloat(value);
				if (dpi1 > 0) {
					scale = dpi1 / 96;
				}
			} catch (Exception e) {
				Logme.error(e);
			}
		} else {
			this.latex = line;
		}
	}

	private Color getColor(final String col) {
		final HColor col2 = col == null ? null : HColorSet.instance().getColorOrWhite(col);
		final Color col3 = col2.toColor(ColorMapper.IDENTITY);
		return col3;
	}

}