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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.
package net.sourceforge.plantuml.activitydiagram3.ftile.vcompact;

import java.util.Collection;
import java.util.Set;

import net.sourceforge.plantuml.activitydiagram3.LinkRendering;
import net.sourceforge.plantuml.activitydiagram3.PositionedNote;
import net.sourceforge.plantuml.activitydiagram3.ftile.AbstractFtile;
import net.sourceforge.plantuml.activitydiagram3.ftile.Ftile;
import net.sourceforge.plantuml.activitydiagram3.ftile.FtileGeometry;
import net.sourceforge.plantuml.activitydiagram3.ftile.Swimlane;
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.CreoleMode;
import net.sourceforge.plantuml.klimt.creole.Sheet;
import net.sourceforge.plantuml.klimt.creole.SheetBlock1;
import net.sourceforge.plantuml.klimt.creole.SheetBlock2;
import net.sourceforge.plantuml.klimt.creole.Stencil;
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.VerticalAlignment;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.klimt.shape.TextBlockUtils;
import net.sourceforge.plantuml.sequencediagram.NotePosition;
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.Opale;
import net.sourceforge.plantuml.utils.MathUtils;

public class FtileWithNotes extends AbstractFtile {

	private final Ftile tile;

	private TextBlock left;
	private TextBlock right;
	private final VerticalAlignment verticalAlignment;

	private final double suppSpace = 20;

	public StyleSignatureBasic getStyleSignature() {
		return StyleSignatureBasic.of(SName.root, SName.element, SName.activityDiagram, SName.note);
	}

	public Set getSwimlanes() {
		return tile.getSwimlanes();
	}

	public Swimlane getSwimlaneIn() {
		return tile.getSwimlaneIn();
	}

	public Swimlane getSwimlaneOut() {
		return tile.getSwimlaneOut();
	}

	public FtileWithNotes(Ftile tile, Collection notes, ISkinParam skinParam,
			VerticalAlignment verticalAlignment) {
		super(tile.skinParam());
		this.verticalAlignment = verticalAlignment;
		this.tile = tile;

		for (PositionedNote note : notes) {
			ISkinParam skinParam2 = skinParam;
			if (note.getColors() != null)
				skinParam2 = note.getColors().mute(skinParam2);

			final Style style = getStyleSignature().getMergedStyle(skinParam.getCurrentStyleBuilder())
					.eventuallyOverride(note.getColors());
			final HColor noteBackgroundColor = style.value(PName.BackGroundColor).asColor(getIHtmlColorSet());
			final HColor borderColor = style.value(PName.LineColor).asColor(getIHtmlColorSet());
			final FontConfiguration fc = style.getFontConfiguration(getIHtmlColorSet());
			final double shadowing = style.value(PName.Shadowing).asDouble();
			final LineBreakStrategy wrapWidth = style.wrapWidth();
			final UStroke stroke = style.getStroke();

			final Sheet sheet = skinParam
					.sheet(fc, skinParam.getDefaultTextAlignment(HorizontalAlignment.LEFT), CreoleMode.FULL)
					.createSheet(note.getDisplay());
			final SheetBlock1 sheet1 = new SheetBlock1(sheet, wrapWidth, skinParam.getPadding());
			final SheetBlock2 sheet2 = new SheetBlock2(sheet1, new Stencil() {
				// -6 and 15 value comes from Opale: this is very ugly!
				public double getStartingX(StringBounder stringBounder, double y) {
					return -6;
				}

				public double getEndingX(StringBounder stringBounder, double y) {
					return sheet1.getEndingX(stringBounder, y) + 15;
				}
			}, UStroke.simple());

			final Opale opale = new Opale(shadowing, borderColor, noteBackgroundColor, sheet2, false, stroke);
			final TextBlock opaleMarged = TextBlockUtils.withMargin(opale, 10, 10);
			if (note.getNotePosition() == NotePosition.LEFT) {
				if (left == null) {
					left = opaleMarged;
				} else {
					left = TextBlockUtils.mergeTB(left, opaleMarged, HorizontalAlignment.CENTER);
				}
			} else {
				if (right == null) {
					right = opaleMarged;
				} else {
					right = TextBlockUtils.mergeTB(right, opaleMarged, HorizontalAlignment.CENTER);
				}
			}
		}

		if (left == null)
			left = TextBlockUtils.empty(0, 0);

		if (right == null)
			right = TextBlockUtils.empty(0, 0);

	}

	private UTranslate getTranslate(StringBounder stringBounder) {
		final XDimension2D dimTotal = calculateDimensionInternal(stringBounder);
		final XDimension2D dimTile = tile.calculateDimension(stringBounder);
		final double xDelta = left.calculateDimension(stringBounder).getWidth();
		final double yDelta;
		if (verticalAlignment == VerticalAlignment.TOP)
			yDelta = 0;
		else
			yDelta = (dimTotal.getHeight() - dimTile.getHeight()) / 2;
		return new UTranslate(xDelta, yDelta);
	}

	private UTranslate getTranslateForLeft(StringBounder stringBounder) {
		final XDimension2D dimTotal = calculateDimensionInternal(stringBounder);
		final XDimension2D dimLeft = left.calculateDimension(stringBounder);
		final double xDelta = 0;
		final double yDelta;
		if (verticalAlignment == VerticalAlignment.TOP)
			yDelta = 0;
		else
			yDelta = (dimTotal.getHeight() - dimLeft.getHeight()) / 2;
		return new UTranslate(xDelta, yDelta);
	}

	private UTranslate getTranslateForRight(StringBounder stringBounder) {
		final XDimension2D dimTotal = calculateDimensionInternal(stringBounder);
		final XDimension2D dimRight = right.calculateDimension(stringBounder);
		final double xDelta = dimTotal.getWidth() - dimRight.getWidth();
		final double yDelta;
		if (verticalAlignment == VerticalAlignment.TOP)
			yDelta = 0;
		else
			yDelta = (dimTotal.getHeight() - dimRight.getHeight()) / 2;
		return new UTranslate(xDelta, yDelta);
	}

	public void drawU(UGraphic ug) {
		final StringBounder stringBounder = ug.getStringBounder();
		left.drawU(ug.apply(getTranslateForLeft(stringBounder)));
		right.drawU(ug.apply(getTranslateForRight(stringBounder)));
		ug.apply(getTranslate(stringBounder)).draw(tile);
	}

	@Override
	protected FtileGeometry calculateDimensionFtile(StringBounder stringBounder) {
		final XDimension2D dimTotal = calculateDimensionInternal(stringBounder);
		final FtileGeometry orig = tile.calculateDimension(stringBounder);
		final UTranslate translate = getTranslate(stringBounder);
		if (orig.hasPointOut())
			return new FtileGeometry(dimTotal, orig.getLeft() + translate.getDx(), orig.getInY() + translate.getDy(),
					orig.getOutY() + translate.getDy());

		return new FtileGeometry(dimTotal, orig.getLeft() + translate.getDx(), orig.getInY() + translate.getDy());
	}

	private XDimension2D calculateDimensionInternal(StringBounder stringBounder) {
		final XDimension2D dimTile = tile.calculateDimension(stringBounder);
		final XDimension2D dimLeft = left.calculateDimension(stringBounder);
		final XDimension2D dimRight = right.calculateDimension(stringBounder);
		final double height = MathUtils.max(dimLeft.getHeight(), dimRight.getHeight(), dimTile.getHeight());
		return new XDimension2D(dimTile.getWidth() + dimLeft.getWidth() + dimRight.getWidth(), height);
	}

	@Override
	final public LinkRendering getInLinkRendering() {
		return tile.getInLinkRendering();
	}

}




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