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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:
 *
 * 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.svek;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.GroupType;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.cucadiagram.GroupHierarchy;
import net.sourceforge.plantuml.cucadiagram.ICucaDiagram;
import net.sourceforge.plantuml.dot.DotData;
import net.sourceforge.plantuml.klimt.color.ColorType;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.skin.ColorParam;
import net.sourceforge.plantuml.skin.rose.Rose;
import net.sourceforge.plantuml.stereo.Stereotype;
import net.sourceforge.plantuml.style.ISkinParam;
import net.sourceforge.plantuml.style.PName;
import net.sourceforge.plantuml.style.SName;
import net.sourceforge.plantuml.style.Style;
import net.sourceforge.plantuml.style.StyleSignatureBasic;
import net.sourceforge.plantuml.svek.image.EntityImageState;

public final class GroupMakerActivity {

	private final ICucaDiagram diagram;
	private final Entity group;
	private final StringBounder stringBounder;

	class InnerGroupHierarchy implements GroupHierarchy {

		public Entity getRootGroup() {
			throw new UnsupportedOperationException();
		}

		public Collection getChildrenGroups(Entity parent) {
			if (parent.isRoot())
				return diagram.getChildrenGroups(group);

			return diagram.getChildrenGroups(parent);
		}

		public boolean isEmpty(Entity g) {
			return diagram.isEmpty(g);
		}

	}

	public GroupMakerActivity(ICucaDiagram diagram, Entity group, StringBounder stringBounder) {
		this.diagram = diagram;
		this.group = group;
		this.stringBounder = stringBounder;
	}

	private List getPureInnerLinks() {
		final List result = new ArrayList<>();
		for (Link link : diagram.getLinks()) {
			final Entity e1 = link.getEntity1();
			final Entity e2 = link.getEntity2();
			if (e1.getParentContainer() == group && e1.isGroup() == false && e2.getParentContainer() == group
					&& e2.isGroup() == false)
				result.add(link);

		}
		return result;
	}

	final public StyleSignatureBasic getDefaultStyleDefinitionGroup() {
		return StyleSignatureBasic.of(SName.root, SName.element, SName.activityDiagram, SName.group);
	}

	public IEntityImage getImage() throws IOException, InterruptedException {
		if (group.countChildren() == 0)
			return new EntityImageState(group, diagram.getSkinParam());

		final List links = getPureInnerLinks();
		final ISkinParam skinParam = diagram.getSkinParam();

		final DotData dotData = new DotData(group, links, group.leafs(), diagram.getUmlDiagramType(), skinParam,
				new InnerGroupHierarchy(), diagram.getEntityFactory(), false, DotMode.NORMAL,
				diagram.getNamespaceSeparator(), diagram.getPragma());

		final GeneralImageBuilder svek2 = new GeneralImageBuilder(dotData, diagram.getEntityFactory(),
				diagram.getSource(), diagram.getPragma(), stringBounder, SName.activityDiagram);

		if (group.getGroupType() == GroupType.INNER_ACTIVITY) {
			final Stereotype stereo = group.getStereotype();
			final HColor borderColor = getColor(ColorParam.activityBorder, stereo);
			final HColor backColor = group.getColors().getColor(ColorType.BACK) == null
					? getColor(ColorParam.background, stereo)
					: group.getColors().getColor(ColorType.BACK);

			final Style style = getDefaultStyleDefinitionGroup().getMergedStyle(skinParam.getCurrentStyleBuilder());
			final double shadowing = style.value(PName.Shadowing).asDouble();

			return new InnerActivity(svek2.buildImage(null, new String[0], false), borderColor, backColor, shadowing);
		}

		throw new UnsupportedOperationException(group.getGroupType().toString());

	}

	private final Rose rose = new Rose();

	protected final HColor getColor(ColorParam colorParam, Stereotype stereo) {
		final ISkinParam skinParam = diagram.getSkinParam();
		return rose.getHtmlColor(skinParam, stereo, colorParam);
	}
}