CommandStyleSingleLineCSS.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
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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
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 *
 * PlantUML distributed in the hope that it will be useful, but
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 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
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 * 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,
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 * Original Author:  Arnaud Roques
 * Contribution: The-Lum
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 */
package net.sourceforge.plantuml.style;

import net.sourceforge.plantuml.TitledDiagram;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.command.ParserPass;
import net.sourceforge.plantuml.command.SingleLineCommand2;
import net.sourceforge.plantuml.regex.IRegex;
import net.sourceforge.plantuml.regex.RegexConcat;
import net.sourceforge.plantuml.regex.RegexLeaf;
import net.sourceforge.plantuml.regex.RegexResult;
import net.sourceforge.plantuml.skin.SkinParam;
import net.sourceforge.plantuml.style.parser.StyleParser;
import net.sourceforge.plantuml.style.parser.StyleParsingException;
import net.sourceforge.plantuml.utils.BlocLines;
import net.sourceforge.plantuml.utils.LineLocation;

public class CommandStyleSingleLineCSS extends SingleLineCommand2<TitledDiagram> {

	public static final CommandStyleSingleLineCSS ME = new CommandStyleSingleLineCSS();

	private CommandStyleSingleLineCSS() {
		super(getRegexConcat());
	}

	private static IRegex getRegexConcat() {
		return RegexConcat.build(CommandStyleSingleLineCSS.class.getName(), RegexLeaf.start(), //
				new RegexLeaf("\\<style\\>"), //
				new RegexLeaf(1, "STYLE", "([\\w%s;:{}]+)"), //
				new RegexLeaf("\\</style\\>"), //
				RegexLeaf.end() //
		);
	}

	@Override
	protected CommandExecutionResult executeArg(TitledDiagram diagram, LineLocation location, RegexResult arg,
			ParserPass currentPass) {
		final String line = arg.get("STYLE", 0);
		try {
			final StyleBuilder styleBuilder = diagram.getSkinParam().getCurrentStyleBuilder();
			diagram.getSkinParam().muteStyle(new StyleParser(styleBuilder).parse(BlocLines.singleString(line)));

			((SkinParam) diagram.getSkinParam()).applyPendingStyleMigration();
			return CommandExecutionResult.ok();
		} catch (StyleParsingException e) {
			return CommandExecutionResult.error("Error in style definition: " + e.getMessage());
		} catch (NoStyleAvailableException e) {
			return CommandExecutionResult.error("General failure: no style available.");
		}
	}

}