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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see .
 *
 * 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
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this LGPL license.
 *
 * The generated images can then be used without any reference to the LGPL license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * 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 )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.klimt;

import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;

import net.sourceforge.plantuml.klimt.geom.XPoint2D;

public class UClip implements UChange {
	private final double x;
	private final double y;
	private final double width;
	private final double height;

	public UClip(double x, double y, double width, double height) {
		this.x = x;
		this.y = y;
		this.width = width;
		this.height = height;
	}

	public UClip enlarge(double delta) {
		return new UClip(x - delta, y - delta, width + 2 * delta, height + 2 * delta);
	}

	@Override
	public String toString() {
		return "CLIP x=" + x + " y=" + y + " w=" + width + " h=" + height;
	}

	public UClip translate(double dx, double dy) {
		return new UClip(x + dx, y + dy, width, height);
	}

	public UClip translate(UTranslate translate) {
		return translate(translate.getDx(), translate.getDy());
	}

	public final double getX() {
		return x;
	}

	public final double getY() {
		return y;
	}

	public final double getWidth() {
		return width;
	}

	public final double getHeight() {
		return height;
	}

	public boolean isInside(XPoint2D pt) {
		return isInside(pt.getX(), pt.getY());
	}

	public boolean isInside(double xp, double yp) {
		if (xp < x) {
			assert getClippedX(xp) != xp;
			return false;
		}
		if (xp > x + width) {
			assert getClippedX(xp) != xp;
			return false;
		}
		if (yp < y) {
			assert getClippedY(yp) != yp;
			return false;
		}
		if (yp > y + height) {
			assert getClippedY(yp) != yp;
			return false;
		}
		assert getClippedX(xp) == xp;
		assert getClippedY(yp) == yp;
		return true;
	}

	// ::comment when __HAXE__
	public Rectangle2D.Double getClippedRectangle(Rectangle2D.Double r) {
		return (Rectangle2D.Double) r.createIntersection(new Rectangle2D.Double(x, y, width, height));
	}

	public Line2D.Double getClippedLine(Line2D.Double line) {
		if (isInside(line.x1, line.y1) && isInside(line.x2, line.y2))
			return line;

		if (isInside(line.x1, line.y1) == false && isInside(line.x2, line.y2) == false) {
			if (line.x1 == line.x2) {
				final double newy1 = getClippedY(line.y1);
				final double newy2 = getClippedY(line.y2);
				if (newy1 != newy2)
					return new Line2D.Double(line.x1, newy1, line.x2, newy2);

			}
			return null;
		}
		if (line.x1 != line.x2 && line.y1 != line.y2)
			return null;

		assert line.x1 == line.x2 || line.y1 == line.y2;
		if (line.y1 == line.y2) {
			final double newx1 = getClippedX(line.x1);
			final double newx2 = getClippedX(line.x2);
			return new Line2D.Double(newx1, line.y1, newx2, line.y2);
		}
		if (line.x1 == line.x2) {
			final double newy1 = getClippedY(line.y1);
			final double newy2 = getClippedY(line.y2);
			return new Line2D.Double(line.x1, newy1, line.x2, newy2);
		}
		throw new IllegalStateException();
	}

	public boolean isInside(double x, double y, UPath shape) {
		return isInside(x + shape.getMinX(), y + shape.getMinY()) && isInside(x + shape.getMaxX(), y + shape.getMaxY());
	}

	private double getClippedX(double xp) {
		if (xp < x)
			return x;

		if (xp > x + width)
			return x + width;

		return xp;
	}

	private double getClippedY(double yp) {
		if (yp < y)
			return y;

		if (yp > y + height)
			return y + height;

		return yp;
	}

}