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PlantUML is a component that allows to quickly write diagrams from text.

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// 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:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
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 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the Eclipse Public License.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [Eclipse Public License - v 1.0]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 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 EPL license.
 *
 * The generated images can then be used without any reference to the EPL 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.skin.rose;

import net.sourceforge.plantuml.klimt.LineBreakStrategy;
import net.sourceforge.plantuml.klimt.UStroke;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.klimt.shape.ULine;
import net.sourceforge.plantuml.klimt.shape.URectangle;
import net.sourceforge.plantuml.skin.AbstractTextualComponent;
import net.sourceforge.plantuml.skin.Area;
import net.sourceforge.plantuml.style.ISkinSimple;
import net.sourceforge.plantuml.style.PName;
import net.sourceforge.plantuml.style.Style;

public class ComponentRoseDivider extends AbstractTextualComponent {

	// private final int outMargin = 5;
	private final HColor borderColor;
	private final HColor background;
	private final boolean empty;

	private final double shadow;
	private final UStroke stroke;
	private final double roundCorner;

	public ComponentRoseDivider(Style style, Display stringsToDisplay, ISkinSimple spriteContainer) {
		super(style, LineBreakStrategy.NONE, 4, 4, 4, spriteContainer, stringsToDisplay, false);

		this.background = style.value(PName.BackGroundColor).asColor(getIHtmlColorSet());
		this.borderColor = style.value(PName.LineColor).asColor(getIHtmlColorSet());
		this.stroke = style.getStroke();
		this.roundCorner = style.value(PName.RoundCorner).asInt(false);
		this.shadow = style.value(PName.Shadowing).asDouble();

		this.empty = stringsToDisplay.get(0).length() == 0;
	}

	@Override
	protected void drawInternalU(UGraphic ug, Area area) {
		final XDimension2D dimensionToUse = area.getDimensionToUse();

		ug = ug.apply(background.bg());
		if (empty) {
			drawSep(ug.apply(UTranslate.dy(dimensionToUse.getHeight() / 2)), dimensionToUse.getWidth());
		} else {
			final TextBlock textBlock = getTextBlock();
			final StringBounder stringBounder = ug.getStringBounder();
			final double textWidth = getTextWidth(stringBounder);
			final double textHeight = getTextHeight(stringBounder);
			final double deltaX = 6;
			final double xpos = (dimensionToUse.getWidth() - textWidth - deltaX) / 2;
			final double ypos = (dimensionToUse.getHeight() - textHeight) / 2;

			drawSep(ug.apply(UTranslate.dy(dimensionToUse.getHeight() / 2)), dimensionToUse.getWidth());

			ug = ug.apply(borderColor);
			ug = ug.apply(stroke);
			final URectangle rect = URectangle.build(textWidth + deltaX, textHeight).rounded(roundCorner);
			rect.setDeltaShadow(shadow);

			ug.apply(new UTranslate(xpos, ypos)).draw(rect);
			textBlock.drawU(ug.apply(new UTranslate(xpos + deltaX, ypos + getMarginY())));
		}
	}

	private void drawSep(UGraphic ug, double width) {
		ug = ug.apply(background);
		drawRectLong(ug.apply(UTranslate.dy(-1)), width);
		drawDoubleLine(ug, width);
	}

	private void drawRectLong(UGraphic ug, double width) {
		final URectangle rectLong = URectangle.build(width, 3).rounded(roundCorner);
		rectLong.setDeltaShadow(shadow);

		ug = ug.apply(UStroke.simple());
		ug.draw(rectLong);
	}

	private void drawDoubleLine(UGraphic ug, final double width) {
		ug = ug.apply(UStroke.withThickness(stroke.getThickness() / 2)).apply(borderColor);
		final ULine line = ULine.hline(width);
		ug.apply(UTranslate.dy(-1)).draw(line);
		ug.apply(UTranslate.dy(2)).draw(line);
	}

	@Override
	public double getPreferredHeight(StringBounder stringBounder) {
		return getTextHeight(stringBounder) + 20;
	}

	@Override
	public double getPreferredWidth(StringBounder stringBounder) {
		return getTextWidth(stringBounder) + 30;
	}

}




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