net.sourceforge.plantuml.klimt.UClip Maven / Gradle / Ivy

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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;
	}

}