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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
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 * Project Info:  https://plantuml.com
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 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
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 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
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 * 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 LGPL license.
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 * The generated images can then be used without any reference to the LGPL license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
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 * by any license, then the generated images are logically covered
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 * 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.activitydiagram3.command;

import java.util.List;

import net.sourceforge.plantuml.activitydiagram3.ActivityDiagram3;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.CommandMultilines2;
import net.sourceforge.plantuml.command.MultilinesStrategy;
import net.sourceforge.plantuml.command.Trim;
import net.sourceforge.plantuml.decoration.Rainbow;
import net.sourceforge.plantuml.descdiagram.command.CommandLinkElement;
import net.sourceforge.plantuml.klimt.color.NoSuchColorException;
import net.sourceforge.plantuml.regex.IRegex;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexOr;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.utils.BlocLines;

public class CommandArrowLong3 extends CommandMultilines2 {

	public CommandArrowLong3() {
		super(getRegexConcat(), MultilinesStrategy.REMOVE_STARTING_QUOTE, Trim.BOTH);
	}

	@Override
	public String getPatternEnd() {
		return "^(.*);$";
	}

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandArrowLong3.class.getName(), RegexLeaf.start(), //
				new RegexOr(//
						new RegexLeaf("->"), //
						new RegexLeaf("COLOR", CommandLinkElement.STYLE_COLORS_MULTIPLES)), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("LABEL", "(.*)"), //
				RegexLeaf.end());
	}

	@Override
	protected CommandExecutionResult executeNow(ActivityDiagram3 diagram, BlocLines lines) throws NoSuchColorException {
		lines = lines.removeEmptyColumns();
		final RegexResult line0 = getStartingPattern().matcher(lines.getFirst().getTrimmed().getString());
		// final HtmlColor color =
		// diagram.getSkinParam().getIHtmlColorSet().getColorIfValid(line0.get("COLOR",
		// 0));
		// diagram.setColorNextArrow(Rainbow.fromColor(color));
		final String colorString = line0.get("COLOR", 0);
		if (colorString != null) {
			Rainbow rainbow = Rainbow.build(diagram.getSkinParam(), colorString,
					diagram.getSkinParam().colorArrowSeparationSpace());
			diagram.setColorNextArrow(rainbow);
		}
		lines = lines.removeStartingAndEnding(line0.get("LABEL", 0), 1);
		diagram.setLabelNextArrow(lines.toDisplay());
		return CommandExecutionResult.ok();
	}

	private  void removeStarting(List lines, String data) {
		if (lines.size() == 0) {
			return;
		}
		lines.set(0, (CS) data);
	}

	private  void removeEnding(List lines) {
		if (lines.size() == 0) {
			return;
		}
		final int n = lines.size() - 1;
		final CharSequence s = lines.get(n);
		lines.set(n, (CS) s.subSequence(0, s.length() - 1));
	}

}