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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!)
 * https://plantuml.com/liberapay (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 GNU General Public License V2.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.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 GPL v2 license.
 *
 * The generated images can then be used without any reference to the GPL v2 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.Fashion;
import net.sourceforge.plantuml.klimt.LineBreakStrategy;
import net.sourceforge.plantuml.klimt.UPath;
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.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.TextBlock;
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 ComponentRoseReference extends AbstractTextualComponent {

	private final int cornersize = 10;
	private final TextBlock textHeader;
	private final double heightFooter = 5;
	private final double xMargin = 2;
	private final HorizontalAlignment position;
	private final Fashion symbolContextHeader;
	private final Fashion symbolContextBody;
	private int roundCorner;

	public ComponentRoseReference(Style style, Style styleHeader, Display stringsToDisplay, ISkinSimple spriteContainer,
			HColor background) {
		super(style, LineBreakStrategy.NONE, 4, 4, 4, spriteContainer,
				stringsToDisplay.subList(1, stringsToDisplay.size()), false);

		this.symbolContextHeader = styleHeader.getSymbolContext(getIHtmlColorSet());
		this.symbolContextBody = style.getSymbolContext(getIHtmlColorSet());
		this.roundCorner = style.value(PName.RoundCorner).asInt(false);
		final FontConfiguration fcHeader = styleHeader.getFontConfiguration(getIHtmlColorSet());
		this.position = style.getHorizontalAlignment();

		this.textHeader = stringsToDisplay.subList(0, 1).create(fcHeader, HorizontalAlignment.LEFT, spriteContainer);

	}

	@Override
	protected void drawInternalU(UGraphic ug, Area area) {
		final XDimension2D dimensionToUse = area.getDimensionToUse();
		final StringBounder stringBounder = ug.getStringBounder();
		final int textHeaderWidth = (int) (getHeaderWidth(stringBounder));
		final int textHeaderHeight = (int) (getHeaderHeight(stringBounder));

		URectangle rect = URectangle.build(dimensionToUse.getWidth() - xMargin * 2 - symbolContextBody.getDeltaShadow(),
				dimensionToUse.getHeight() - heightFooter);
		if (this.roundCorner != 0)
			rect = rect.rounded(this.roundCorner);

		rect.setDeltaShadow(symbolContextBody.getDeltaShadow());
		ug = symbolContextBody.apply(ug);
		ug.apply(UTranslate.dx(xMargin)).draw(rect);

		final UPath corner = UPath.none();
		if (this.roundCorner == 0) {
			corner.moveTo(0, 0);
			corner.lineTo(textHeaderWidth, 0);

			corner.lineTo(textHeaderWidth, textHeaderHeight - cornersize);
			corner.lineTo(textHeaderWidth - cornersize, textHeaderHeight);

			corner.lineTo(0, textHeaderHeight);
			corner.lineTo(0, 0);
		} else {
			corner.moveTo(this.roundCorner / 2, 0);
			corner.lineTo(textHeaderWidth, 0);

			corner.lineTo(textHeaderWidth, textHeaderHeight - cornersize);
			corner.lineTo(textHeaderWidth - cornersize, textHeaderHeight);

			corner.lineTo(0, textHeaderHeight);
			corner.lineTo(0, this.roundCorner / 2);

			corner.arcTo(this.roundCorner / 2, this.roundCorner / 2, 0, 0, 1, this.roundCorner / 2, 0);
		}

		ug = symbolContextHeader.apply(ug);
		ug.apply(UTranslate.dx(xMargin)).draw(corner);

		ug = ug.apply(UStroke.simple());

		textHeader.drawU(ug.apply(new UTranslate(15, 2)));
		final double textPos;
		if (position == HorizontalAlignment.CENTER) {
			final double textWidth = getTextBlock().calculateDimension(stringBounder).getWidth();
			textPos = (dimensionToUse.getWidth() - textWidth) / 2;
		} else if (position == HorizontalAlignment.RIGHT) {
			final double textWidth = getTextBlock().calculateDimension(stringBounder).getWidth();
			textPos = dimensionToUse.getWidth() - textWidth - getMarginX2() - xMargin;
		} else {
			textPos = getMarginX1() + xMargin;
		}
		getTextBlock().drawU(ug.apply(new UTranslate(textPos, (getMarginY() + textHeaderHeight))));
	}

	private double getHeaderHeight(StringBounder stringBounder) {
		final XDimension2D headerDim = textHeader.calculateDimension(stringBounder);
		return headerDim.getHeight() + 2 * 1;
	}

	private double getHeaderWidth(StringBounder stringBounder) {
		final XDimension2D headerDim = textHeader.calculateDimension(stringBounder);
		return headerDim.getWidth() + 30 + 15;
	}

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

	@Override
	public double getPreferredWidth(StringBounder stringBounder) {
		return Math.max(getTextWidth(stringBounder), getHeaderWidth(stringBounder)) + xMargin * 2
				+ symbolContextBody.getDeltaShadow();
	}

}




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