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package net.sourceforge.plantuml.activitydiagram3.ftile;

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

import net.sourceforge.plantuml.activitydiagram3.LinkRendering;
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;

public class FtileHeightFixedCentered extends AbstractFtile {

	private final Ftile tile;
	private final double fixedHeight;

	public FtileHeightFixedCentered(Ftile tile, double fixedHeight) {
		super(tile.skinParam());
		this.tile = tile;
		this.fixedHeight = fixedHeight;
	}

	@Override
	public Collection getMyChildren() {
		return Collections.singleton(tile);
		// return tile.getMyChildren();
	}

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

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

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

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

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

	@Override
	protected FtileGeometry calculateDimensionFtile(StringBounder stringBounder) {
		return tile.calculateDimension(stringBounder).translate(getTranslate(stringBounder)).fixedHeight(fixedHeight);
	}

	private UTranslate getTranslate(StringBounder stringBounder) {
		final XDimension2D dim = tile.calculateDimension(stringBounder);
		if (dim.getHeight() > fixedHeight)
			throw new IllegalStateException();

		return UTranslate.dy((fixedHeight - dim.getHeight()) / 2);
	}

	public void drawU(UGraphic ug) {
		ug.apply(getTranslate(ug.getStringBounder())).draw(tile);
	}

}