plantuml/src/net/sourceforge/plantuml/creole/command/CommandCreoleLatex.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2023, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
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 * This file is part of PlantUML.
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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 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.
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 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.creole.command;

import net.sourceforge.plantuml.command.regex.Matcher2;
import net.sourceforge.plantuml.command.regex.MyPattern;
import net.sourceforge.plantuml.command.regex.Pattern2;
import net.sourceforge.plantuml.creole.legacy.StripeSimple;
import net.sourceforge.plantuml.graphic.Splitter;
import net.sourceforge.plantuml.math.ScientificEquationSafe;

public class CommandCreoleLatex implements Command {
	// ::remove file when WASM

	@Override
	public String startingChars() {
		return "<";
	}

	private static final Pattern2 pattern = MyPattern.cmpile("^(" + Splitter.latexPattern + ")");

	private CommandCreoleLatex() {
	}

	public static Command create() {
		return new CommandCreoleLatex();
	}

	public int matchingSize(String line) {
		final Matcher2 m = pattern.matcher(line);
		if (m.find() == false)
			return 0;

		return m.group(1).length();
	}

	public String executeAndGetRemaining(String line, StripeSimple stripe) {
		final Matcher2 m = pattern.matcher(line);
		if (m.find() == false)
			throw new IllegalStateException();

		final String latex = m.group(2);
		stripe.addMath(ScientificEquationSafe.fromLatex(latex));
		return line.substring(m.group(1).length());
	}

}