plantuml/src/net/sourceforge/plantuml/ugraphic/MinMax.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2017, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
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 * This file is part of PlantUML.
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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 as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
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 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.ugraphic;

import java.awt.geom.Dimension2D;
import java.awt.geom.Point2D;

import net.sourceforge.plantuml.Dimension2DDouble;
import net.sourceforge.plantuml.graphic.HtmlColor;
import net.sourceforge.plantuml.graphic.HtmlColorUtils;

public class MinMax {

	private final double maxX;
	private final double maxY;
	private final double minX;
	private final double minY;

	public boolean doesHorizontalCross(Point2D.Double pt1, Point2D.Double pt2) {
		if (pt1.getY() != pt2.getY()) {
			throw new IllegalArgumentException();
		}
		if (pt1.getX() == pt2.getX()) {
			throw new IllegalArgumentException();
		}
		final double y = pt1.getY();
		if (y < minY || y > maxY) {
			return false;
		}
		if (pt1.getX() < minX && pt2.getX() > maxX) {
			return true;
		}
		if (pt2.getX() < minX && pt1.getX() > maxX) {
			return true;
		}
		return false;
	}

	public static MinMax getEmpty(boolean initToZero) {
		if (initToZero) {
			return new MinMax(0, 0, 0, 0);
		}
		return new MinMax(Double.MAX_VALUE, Double.MAX_VALUE, -Double.MAX_VALUE, -Double.MAX_VALUE);
	}

	@Override
	public String toString() {
		return "(" + minX + "," + minY + ")->(" + maxX + "," + maxY + ")";
	}

	public static MinMax fromMutable(MinMaxMutable minmax) {
		return new MinMax(minmax.getMinX(), minmax.getMinY(), minmax.getMaxX(), minmax.getMaxY());
	}

	private MinMax(double minX, double minY, double maxX, double maxY) {
		this.minX = minX;
		this.minY = minY;
		this.maxX = maxX;
		this.maxY = maxY;
	}

	public MinMax addPoint(Point2D pt) {
		return addPoint(pt.getX(), pt.getY());
	}

	public MinMax addPoint(double x, double y) {
		return new MinMax(Math.min(x, minX), Math.min(y, minY), Math.max(x, maxX), Math.max(y, maxY));
	}

	public MinMax addMinMax(MinMax other) {
		return new MinMax(Math.min(other.minX, minX), Math.min(other.minY, minY), Math.max(other.maxX, maxX), Math.max(
				other.maxY, maxY));
	}

	public static MinMax fromMax(double maxX, double maxY) {
		return MinMax.getEmpty(true).addPoint(maxX, maxY);
	}

	public static MinMax fromDim(Dimension2D dim) {
		return fromMax(dim.getWidth(), dim.getHeight());
	}

	public final double getMaxX() {
		return maxX;
	}

	public final double getMaxY() {
		return maxY;
	}

	public final double getMinX() {
		return minX;
	}

	public final double getMinY() {
		return minY;
	}

	public double getHeight() {
		return maxY - minY;
	}

	public double getWidth() {
		return maxX - minX;
	}

	public Dimension2D getDimension() {
		return new Dimension2DDouble(maxX - minX, maxY - minY);
	}

	public void drawGrey(UGraphic ug) {
		final HtmlColor color = HtmlColorUtils.GRAY;
		ug = ug.apply(new UChangeColor(color)).apply(new UChangeBackColor(color));
		ug = ug.apply(new UTranslate(minX, minY));
		ug.draw(new URectangle(getWidth(), getHeight()));
	}

	public MinMax translate(UTranslate translate) {
		final double dx = translate.getDx();
		final double dy = translate.getDy();
		return new MinMax(minX + dx, minY + dy, maxX + dx, maxY + dy);
	}

}