plantuml/src/net/sourceforge/plantuml/command/CommandScaleWidthOrHeight.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2023, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
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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
 * 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
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 * Original Author:  Arnaud Roques
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 */
package net.sourceforge.plantuml.command;

import net.sourceforge.plantuml.AbstractPSystem;
import net.sourceforge.plantuml.LineLocation;
import net.sourceforge.plantuml.ScaleHeight;
import net.sourceforge.plantuml.ScaleWidth;
import net.sourceforge.plantuml.command.regex.IRegex;
import net.sourceforge.plantuml.command.regex.RegexConcat;
import net.sourceforge.plantuml.command.regex.RegexLeaf;
import net.sourceforge.plantuml.command.regex.RegexResult;

public class CommandScaleWidthOrHeight extends SingleLineCommand2<AbstractPSystem> {

	public static final CommandScaleWidthOrHeight ME = new CommandScaleWidthOrHeight();

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

	static IRegex getRegexConcat() {
		return RegexConcat.build(CommandScaleWidthOrHeight.class.getName(), RegexLeaf.start(), //
				new RegexLeaf("scale"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexLeaf("VALUE", "([0-9.]+)"), //
				RegexLeaf.spaceOneOrMore(), //
				new RegexLeaf("WIDTH", "(width|height)"), RegexLeaf.end()); //
	}

	@Override
	protected CommandExecutionResult executeArg(AbstractPSystem diagram, LineLocation location, RegexResult arg) {
		final double size = Double.parseDouble(arg.get("VALUE", 0));
		final boolean width = "width".equalsIgnoreCase(arg.get("WIDTH", 0));
		if (width) {
			diagram.setScale(new ScaleWidth(size));
		} else {
			diagram.setScale(new ScaleHeight(size));
		}
		return CommandExecutionResult.ok();
	}

}