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package net.sourceforge.plantuml.sequencediagram.command;

import java.util.ArrayList;
import java.util.List;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.CommandMultilines;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.NoSuchColorException;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexOptional;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.sequencediagram.Participant;
import net.sourceforge.plantuml.sequencediagram.Reference;
import net.sourceforge.plantuml.sequencediagram.SequenceDiagram;
import net.sourceforge.plantuml.url.Url;
import net.sourceforge.plantuml.url.UrlBuilder;
import net.sourceforge.plantuml.url.UrlMode;
import net.sourceforge.plantuml.utils.BlocLines;

public class CommandReferenceMultilinesOverSeveral extends CommandMultilines {

	public CommandReferenceMultilinesOverSeveral() {
		super(getConcat().getPattern());
	}

	private static RegexConcat getConcat() {
		return RegexConcat.build(CommandReferenceMultilinesOverSeveral.class.getName(), //
				RegexLeaf.start(), //
				new RegexLeaf("ref"), //
				new RegexLeaf("REF", "(#\\w+)?"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexLeaf("over"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexLeaf("PARTS", "((?:[%pLN_.@]+|[%g][^%g]+[%g])(?:[%s]*,[%s]*(?:[%pLN_.@]+|[%g][^%g]+[%g]))*)"), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexOptional(new RegexLeaf("URL", "(\\[\\[.*?\\]\\])")), //
				RegexLeaf.spaceZeroOrMore(), //
				new RegexLeaf("UNUSED", "(#\\w+)?"), //
				RegexLeaf.end());
	}

	@Override
	public String getPatternEnd() {
		return "^end[%s]?(ref)?$";
	}

	public CommandExecutionResult execute(final SequenceDiagram diagram, BlocLines lines) throws NoSuchColorException {
		final String firstLine = lines.getFirst().getTrimmed().getString();
		final RegexResult arg = getConcat().matcher(firstLine);
		if (arg == null)
			return CommandExecutionResult.error("Cannot parse line " + firstLine);

		final String s1 = arg.get("REF", 0);
		final HColor backColorElement = s1 == null ? null : diagram.getSkinParam().getIHtmlColorSet().getColor(s1);
		// final HtmlColor backColorGeneral =
		// HtmlColorSetSimple.instance().getColorIfValid(line0.get(1));

		final List participants = StringUtils.splitComma(arg.get("PARTS", 0));
		final List p = new ArrayList<>();
		for (String s : participants)
			p.add(diagram.getOrCreateParticipant(StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(s)));

		lines = lines.subExtract(1, 1);
		lines = lines.removeEmptyColumns();
		final Display strings = lines.toDisplay();

		final String url = arg.get("URL", 0);
		final UrlBuilder b = new UrlBuilder(diagram.getSkinParam().getValue("topurl"), UrlMode.STRICT);
		Url u = null;
		if (url != null)
			u = b.getUrl(url);

		final HColor backColorGeneral = null;
		final Reference ref = new Reference(p, u, strings, backColorGeneral, backColorElement,
				diagram.getSkinParam().getCurrentStyleBuilder());
		diagram.addReference(ref);
		return CommandExecutionResult.ok();
	}

}




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