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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
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
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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 .
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * 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.
 *
 * 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.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * 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.cucadiagram;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.FontConfiguration;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.AbstractTextBlock;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.klimt.shape.TextBlockLineBefore;
import net.sourceforge.plantuml.klimt.shape.TextBlockUtils;
import net.sourceforge.plantuml.style.ISkinSimple;
import net.sourceforge.plantuml.style.PName;
import net.sourceforge.plantuml.style.Style;

public abstract class BodyEnhancedAbstract extends AbstractTextBlock implements TextBlock {

	protected final HorizontalAlignment align;
	protected final FontConfiguration titleConfig;
	protected TextBlock area;
	private final Style style;

	BodyEnhancedAbstract(HorizontalAlignment align, FontConfiguration titleConfig, Style style) {
		this.align = align;
		this.titleConfig = titleConfig;
		this.style = style;
	}

	public static boolean isBlockSeparator(CharSequence cs) {
		final String s = cs.toString();
		if (s.startsWith("--") && s.endsWith("--"))
			return true;

		if (s.startsWith("==") && s.endsWith("=="))
			return true;

		if (s.startsWith("..") && s.endsWith("..") && s.equals("...") == false)
			return true;

		if (s.startsWith("__") && s.endsWith("__"))
			return true;

		return false;
	}

	public final XDimension2D calculateDimension(StringBounder stringBounder) {
		return getArea(stringBounder).calculateDimension(stringBounder);
	}

	final public void drawU(UGraphic ug) {
		getArea(ug.getStringBounder()).drawU(ug);
	}

	final protected TextBlock getTitle(String s, ISkinSimple spriteContainer) {
		if (s.length() <= 4)
			return null;

		s = StringUtils.trin(s.substring(2, s.length() - 2));
		return Display.getWithNewlines(s).create(titleConfig, HorizontalAlignment.LEFT, spriteContainer);
	}

	abstract protected TextBlock getArea(StringBounder stringBounder);

	abstract protected double getMarginX();

	final protected TextBlock decorate(TextBlock block, char separator, TextBlock title, StringBounder stringBounder) {
		final double marginX = getMarginX();
		if (separator == 0)
			return TextBlockUtils.withMargin(block, marginX, 0);

		if (title == null)
			return new TextBlockLineBefore(getDefaultThickness(), TextBlockUtils.withMargin(block, marginX, 4),
					separator);

		final XDimension2D dimTitle = title.calculateDimension(stringBounder);
		final TextBlock raw = new TextBlockLineBefore(getDefaultThickness(),
				TextBlockUtils.withMargin(block, marginX, 6, dimTitle.getHeight() / 2, 4), separator, title);
		return TextBlockUtils.withMargin(raw, 0, 0, dimTitle.getHeight() / 2, 0);
	}

	final protected double getDefaultThickness() {
		return style.value(PName.LineThickness).asDouble();
	}

	public final Style getStyle() {
		return style;
	}

}