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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
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 * Project Info:  https://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 V2.
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 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
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 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
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 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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 * 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
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 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
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 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
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 * Icons provided by OpenIconic :  https://useiconic.com/open
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 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
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 *
 */
package net.sourceforge.plantuml.elk;

import net.atmp.CucaDiagram;
import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.annotation.DuplicateCode;
import net.sourceforge.plantuml.decoration.symbol.USymbol;
import net.sourceforge.plantuml.decoration.symbol.USymbols;
import net.sourceforge.plantuml.elk.proxy.graph.ElkNode;
import net.sourceforge.plantuml.klimt.UStroke;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColors;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.MagneticBorder;
import net.sourceforge.plantuml.klimt.geom.MagneticBorderNone;
import net.sourceforge.plantuml.klimt.geom.RectangleArea;
import net.sourceforge.plantuml.klimt.geom.XPoint2D;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.klimt.shape.URectangle;
import net.sourceforge.plantuml.skin.AlignmentParam;
import net.sourceforge.plantuml.skin.UmlDiagramType;
import net.sourceforge.plantuml.style.ISkinParam;
import net.sourceforge.plantuml.style.PName;
import net.sourceforge.plantuml.style.Style;
import net.sourceforge.plantuml.svek.Cluster;
import net.sourceforge.plantuml.svek.ClusterDecoration;
import net.sourceforge.plantuml.svek.ClusterHeader;
import net.sourceforge.plantuml.svek.PackageStyle;

public class MyElkCluster {

	private final Entity group;
	private final ElkNode elkNode;
	private final CucaDiagram diagram;
	private final ISkinParam skinParam;

	public MyElkCluster(CucaDiagram diagram, Entity group, ElkNode elkNode) {
		this.group = group;
		this.elkNode = elkNode;
		this.diagram = diagram;
		this.skinParam = diagram.getSkinParam();

	}

	public void drawSingleCluster(UGraphic ug) {
		final XPoint2D corner = CucaDiagramFileMakerElk.getPosition(elkNode);
		final URectangle rect = URectangle.build(elkNode.getWidth(), elkNode.getHeight());

		PackageStyle packageStyle = group.getPackageStyle();
		final ISkinParam skinParam = diagram.getSkinParam();
		if (packageStyle == null)
			packageStyle = skinParam.packageStyle();

		final UmlDiagramType umlDiagramType = diagram.getUmlDiagramType();

		final Style style = Cluster
				.getDefaultStyleDefinition(umlDiagramType.getStyleName(), group.getUSymbol(), group.getGroupType())
				.getMergedStyle(skinParam.getCurrentStyleBuilder());
		final double shadowing = style.value(PName.Shadowing).asDouble();
		final UStroke stroke = Cluster.getStrokeInternal(group, style);

		HColor backColor = getBackColor(umlDiagramType);
		backColor = Cluster.getBackColor(backColor, group.getStereotype(), umlDiagramType.getStyleName(),
				group.getUSymbol(), skinParam.getCurrentStyleBuilder(), skinParam.getIHtmlColorSet(),
				group.getGroupType());

		final double roundCorner = style.value(PName.RoundCorner).asDouble();
//			final double roundCorner = group.getUSymbol() == null ? 0
//					: group.getUSymbol().getSkinParameter().getRoundCorner(skinParam, group.getStereotype());

		final RectangleArea rectangleArea = new RectangleArea(0, 0, elkNode.getWidth(), elkNode.getHeight());
		final ClusterHeader clusterHeader = new ClusterHeader(group, diagram.getSkinParam(), diagram,
				ug.getStringBounder());

		final ClusterDecoration decoration = new ClusterDecoration(packageStyle, group.getUSymbol(),
				clusterHeader.getTitle(), clusterHeader.getStereo(), rectangleArea, stroke);

		final HColor borderColor = HColors.BLACK;
		decoration.drawU(ug.apply(UTranslate.point(corner)), backColor, borderColor, shadowing, roundCorner,
				skinParam.getHorizontalAlignment(AlignmentParam.packageTitleAlignment, null, false, null),
				skinParam.getStereotypeAlignment(), 0);

//			// Print a simple rectangle right now
//			ug.apply(HColorUtils.BLACK).apply(UStroke.withThickness(1.5)).apply(new UTranslate(corner)).draw(rect);
	}

	private HColor getBackColor(UmlDiagramType umlDiagramType) {
		return null;
	}

	@DuplicateCode(reference = "Cluster")
	public MagneticBorder getMagneticBorder(StringBounder stringBounder) {

		USymbol uSymbol = group.getUSymbol();
		PackageStyle packageStyle = group.getPackageStyle();
		if (packageStyle == null)
			packageStyle = skinParam.packageStyle();

		if (uSymbol == null && packageStyle == PackageStyle.FOLDER)
			uSymbol = USymbols.FOLDER;

		if (uSymbol == null)
			return new MagneticBorderNone();

		final XPoint2D corner = CucaDiagramFileMakerElk.getPosition(elkNode);

		final UmlDiagramType umlDiagramType = UmlDiagramType.CLASS;

		final Style style = Cluster
				.getDefaultStyleDefinition(umlDiagramType.getStyleName(), uSymbol, group.getGroupType())
				.withTOBECHANGED(group.getStereotype()).getMergedStyle(skinParam.getCurrentStyleBuilder());

		final UStroke stroke = Cluster.getStrokeInternal(group, style);

		final RectangleArea rectangleArea = new RectangleArea(0, 0, elkNode.getWidth(), elkNode.getHeight());
		final ClusterHeader clusterHeader = new ClusterHeader(group, diagram.getSkinParam(), diagram, stringBounder);

		final ClusterDecoration decoration = new ClusterDecoration(packageStyle, group.getUSymbol(),
				clusterHeader.getTitle(), clusterHeader.getStereo(), rectangleArea, stroke);

		final TextBlock textBlock = decoration.getTextBlock(HColors.BLACK, HColors.BLACK, 0, 0,
				skinParam.getHorizontalAlignment(AlignmentParam.packageTitleAlignment, null, false, null),
				skinParam.getStereotypeAlignment(), 0);

		final MagneticBorder orig = textBlock.getMagneticBorder();

		return new MagneticBorder() {
			public UTranslate getForceAt(StringBounder stringBounder, XPoint2D position) {
				return orig.getForceAt(stringBounder, position.move(-corner.x, -corner.y));
			}
		};
	}

}




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