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package net.sourceforge.plantuml.nwdiag.next;

import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeSet;

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.MinMax;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.nwdiag.VerticalLine;
import net.sourceforge.plantuml.nwdiag.core.NServer;
import net.sourceforge.plantuml.nwdiag.core.Network;
import net.sourceforge.plantuml.style.SName;
import net.sourceforge.plantuml.utils.MathUtils;

public class NServerDraw {

	public static final int MAGIC = 15;

	private final TextBlock box;
	private final Network network;
	private final NServer server;
	private final Map conns;
	private final List networks;
	private final double topMargin;

	@Override
	public String toString() {
		return server.toString() + " " + conns;
	}

	public NServerDraw(NServer server, TextBlock box, Map conns, List networks,
			double topMargin) {
		this.topMargin = topMargin;
		this.networks = networks;
		this.box = box;
		this.network = server.getMainNetworkNext();
		this.server = server;
		this.conns = conns;
	}

	public boolean isLinkedTo(Network some) {
		return conns.containsKey(some);
	}

	private final double marginAd = 10;

	private int marginBoxW() {
		return 15;
	}

	private double marginBoxH() {
		return topMargin;
	}

	public MinMax getMinMax(StringBounder stringBounder, double width, double height) {
		final double xMiddle = width / 2;
		final double yMiddle = height / 2;
		final XDimension2D dimBox = box.calculateDimension(stringBounder);

		final double x1 = xMiddle - dimBox.getWidth() / 2;
		final double y1 = yMiddle - dimBox.getHeight() / 2;
		final double x2 = xMiddle + dimBox.getWidth() / 2;
		final double y2 = yMiddle + dimBox.getHeight() / 2;
		return MinMax.getEmpty(false).addPoint(x1 - 5, y1 - 5).addPoint(x2 + 5, y2 + 5);
	}

	public void drawMe(UGraphic ug, double width, double height) {
		final double xMiddle = width / 2;
		final double yMiddle = height / 2;
		drawCenter(ug, box, xMiddle, yMiddle);
	}

	public void drawLinks(UGraphic ug, double xstart, double width, double height) {

		ug = ug.apply(UTranslate.dx(xstart));

		final double ynet1 = network.getY();
		final double yMiddle = height / 2;
		final StringBounder stringBounder = ug.getStringBounder();
		final XDimension2D dimBox = box.calculateDimension(stringBounder);

		final double alpha = yMiddle - dimBox.getHeight() / 2;
		final double posLink1 = (yMiddle - dimBox.getHeight() / 2 - topMargin + MAGIC) / 2;

		final double xMiddle = width / 2;
		final double xLinkPos = width / 2;

		final TreeSet skip = new TreeSet<>();

		for (Network n : networks)
			if (xstart + xMiddle > n.getXmin() && xstart + xMiddle < n.getXmax())
				skip.add(n.getY());

		if (server.printFirstLink())
			if (network.isVisible())
				new VerticalLine(ynet1 + GridTextBlockDecorated.NETWORK_THIN, ynet1 + alpha, skip)
						.drawU(ug.apply(UTranslate.dx(xLinkPos + network.magicDelta())));
			else
				new VerticalLine(ynet1, ynet1 + alpha, Collections.emptySet())
						.drawU(ug.apply(UTranslate.dx(xLinkPos + network.magicDelta())));

		final TextBlock link = getTextBlockLink1();
		drawCenter(ug, link, xMiddle + network.magicDelta(), ynet1 + posLink1);

		final double seven = 9.0;
		double x = xLinkPos - (conns.size() - 2) * seven / 2;
		boolean first = true;
		for (Entry ent : conns.entrySet()) {
			if (ent.getKey() == network)
				continue;

			final double ynet2 = ent.getKey().getY();
			new VerticalLine(ynet1 + yMiddle + dimBox.getHeight() / 2, ynet2, skip)
					.drawU(ug.apply(UTranslate.dx(x - ent.getKey().magicDelta())));

			final TextBlock block = server.toTextBlock(SName.arrow, ent.getValue());

			final double xtext;
			if (first && conns.size() > 2)
				xtext = x - block.calculateDimension(stringBounder).getWidth() / 2;
			else
				xtext = x;

			drawCenter(ug, block, xtext - ent.getKey().magicDelta(), ynet2 - alpha / 2);
			x += seven;
			first = false;

		}

	}

	private TextBlock getTextBlockLink1() {
		return server.toTextBlock(SName.arrow, conns.get(network));
	}

	private TextBlock link2() {
		final int i = networks.indexOf(network);
		if (i == networks.size() - 1)
			return null;

		return server.toTextBlock(SName.arrow, conns.get(networks.get(i + 1)));
	}

	private void drawCenter(UGraphic ug, TextBlock block, double x, double y) {
		if (block == null)
			return;

		final XDimension2D dim = block.calculateDimension(ug.getStringBounder());
		block.drawU(ug.apply(new UTranslate(x - dim.getWidth() / 2, y - dim.getHeight() / 2)));

	}

	public XDimension2D naturalDimension(StringBounder stringBounder) {
		final XDimension2D dimLink1 = getTextBlockLink1() == null ? new XDimension2D(0, 0)
				: getTextBlockLink1().calculateDimension(stringBounder);
		final XDimension2D dimBox = box.calculateDimension(stringBounder);
		final XDimension2D dimLink2 = link2() == null ? new XDimension2D(0, 0)
				: link2().calculateDimension(stringBounder);
		final double width = MathUtils.max(dimLink1.getWidth() + 2 * marginAd, dimBox.getWidth() + 2 * marginBoxW(),
				dimLink2.getWidth() + 2 * marginAd);
		final double height = dimLink1.getHeight() + 2 * marginAd + 2 * marginBoxH() + dimBox.getHeight()
				+ dimLink2.getHeight() + 2 * marginAd;
		return new XDimension2D(width, height);
	}

	public final Network getNetwork() {
		return network;
	}

	public final NServer getServer() {
		return server;
	}

}




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