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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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 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * 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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 * 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
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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 GPL v2 license.
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 * although this will be appreciated by the PlantUML team.
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 * by any license, then the generated images are logically covered
 * by the very same license.
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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
 * (see https://plantuml.com/graphviz-dot )
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 * Icons provided by OpenIconic :  https://useiconic.com/open
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 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
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 *
 */
package net.sourceforge.plantuml.sequencediagram.graphic;

import net.sourceforge.plantuml.klimt.UTranslate;
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.sequencediagram.NotePosition;
import net.sourceforge.plantuml.skin.Area;
import net.sourceforge.plantuml.skin.ArrowComponent;
import net.sourceforge.plantuml.skin.Context2D;
import net.sourceforge.plantuml.skin.rose.Rose;
import net.sourceforge.plantuml.url.Url;

class MessageSelfArrow extends Arrow {

	private final LivingParticipantBox p1;
	private final double deltaX;
	private final double deltaY;
	private final boolean isReverse;
	private final int currentLevel;
	private final double halfLifeWidth;

	public MessageSelfArrow(double startingY, Rose skin, ArrowComponent arrow, LivingParticipantBox p1, double deltaY,
													Url url, double deltaX, boolean isReverse, int currentLevel, double halfLifeWidth) {
		super(startingY, skin, arrow, url);
		this.p1 = p1;
		this.deltaY = deltaY;
		this.deltaX = deltaX;
		this.isReverse = isReverse;
		this.currentLevel = currentLevel;
		this.halfLifeWidth = halfLifeWidth;
	}

	@Override
	public double getPreferredHeight(StringBounder stringBounder) {
		return getArrowComponent().getPreferredHeight(stringBounder);
	}

	@Override
	public double getPreferredWidth(StringBounder stringBounder) {
		double length = p1.getLiveThicknessAt(stringBounder, getArrowYStartLevel(stringBounder)).getSegment().getLength();
		return getArrowComponent().getPreferredWidth(stringBounder) + length;
	}

	@Override
	protected void drawInternalU(UGraphic ug, double maxX, Context2D context) {
		final StringBounder stringBounder = ug.getStringBounder();
		ug = ug.apply(new UTranslate(getStartingX(stringBounder), getStartingY() + deltaY));
		final Area area = new Area(
				new XDimension2D(getPreferredWidth(stringBounder), getPreferredHeight(stringBounder)));
		area.setDeltaX1(deltaY);
		area.setLevel(currentLevel);
		area.setLiveDeltaSize(halfLifeWidth);
		startUrl(ug);
		getArrowComponent().drawU(ug, area, context);
		endUrl(ug);
	}

	@Override
	public double getStartingX(StringBounder stringBounder) {
		// if (OptionFlags.STRICT_SELFMESSAGE_POSITION) {
		// final double pos1 = p1.getLiveThicknessAt(stringBounder,
		// getArrowYEndLevel(stringBounder)).getSegment()
		// .getPos2();
		// return pos1;
		// }
		final double pos2 = p1.getLiveThicknessAt(stringBounder, getArrowYStartLevel(stringBounder)).getSegment()
				.getPos2();
		if (isReverse) {

			return pos2  - getPreferredWidth(stringBounder);
		} else
			return pos2 + deltaX;
	}

	@Override
	public int getDirection(StringBounder stringBounder) {
		return 1;
	}

	@Override
	public double getArrowYStartLevel(StringBounder stringBounder) {
		if (getArrowComponent() instanceof ArrowComponent) {
			final ArrowComponent arrowComponent = (ArrowComponent) getArrowComponent();
			final XDimension2D dim = new XDimension2D(arrowComponent.getPreferredWidth(stringBounder),
					arrowComponent.getPreferredHeight(stringBounder));
			return getStartingY() + arrowComponent.getStartPoint(stringBounder, dim).getY();
		}
		return getStartingY();
	}

	@Override
	public double getArrowYEndLevel(StringBounder stringBounder) {
		if (getArrowComponent() instanceof ArrowComponent) {
			final ArrowComponent arrowComponent = (ArrowComponent) getArrowComponent();
			final XDimension2D dim = new XDimension2D(arrowComponent.getPreferredWidth(stringBounder),
					arrowComponent.getPreferredHeight(stringBounder));
			return getStartingY() + arrowComponent.getEndPoint(stringBounder, dim).getY();
		}
		return getStartingY() + getArrowComponent().getPreferredHeight(stringBounder);
	}

	public double getMaxX(StringBounder stringBounder) {
		return getStartingX(stringBounder) + getPreferredWidth(stringBounder);
	}

	public double getMinX(StringBounder stringBounder) {
		return getStartingX(stringBounder);
	}

	public String toString(StringBounder stringBounder) {
		return super.toString();
	}

	@Override
	public LivingParticipantBox getParticipantAt(StringBounder stringBounder, NotePosition position) {
		return p1;
	}

	@Override
	public double getActualWidth(StringBounder stringBounder) {
		return getPreferredWidth(stringBounder);
	}

	public boolean isReverse() {
		return isReverse;
	}
}




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