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PlantUML is a component that allows to quickly write diagrams from text.
// 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 General Public License V2.
*
* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
* LICENSE ("AGREEMENT"). [GNU General Public License V2]
*
* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
*
* You may obtain a copy of the License at
*
* https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* 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 GPL v2 license.
*
* The generated images can then be used without any reference to the GPL v2 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.dot;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.abel.Link;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.geom.XPoint2D;
import net.sourceforge.plantuml.klimt.geom.XRectangle2D;
import net.sourceforge.plantuml.klimt.shape.ULine;
import net.sourceforge.plantuml.klimt.shape.UPolygon;
import net.sourceforge.plantuml.svek.Bibliotekon;
import net.sourceforge.plantuml.svek.SvekLine;
public class Neighborhood {
private final Entity leaf;
private final List sametailLinks;
private final List allButSametails;
public Neighborhood(Entity leaf, List sametailLinks, List all) {
this.leaf = leaf;
this.sametailLinks = sametailLinks;
this.allButSametails = new ArrayList<>(all);
allButSametails.removeAll(sametailLinks);
}
public void drawU(UGraphic ug, double minX, double minY, Bibliotekon bibliotekon, XDimension2D shapeDim) {
final Set contactPoints = new HashSet<>();
for (Link link : sametailLinks) {
final SvekLine line = bibliotekon.getLine(link);
final XPoint2D contact = line.getStartContactPoint();
contactPoints.add(contact);
}
final XRectangle2D rect = new XRectangle2D(minX, minY, shapeDim.getWidth(), shapeDim.getHeight());
final XPoint2D center = new XPoint2D(rect.getCenterX(), rect.getCenterY());
for (XPoint2D pt : contactPoints) {
final XPoint2D inter = intersection(rect, center, pt);
if (inter == null) {
// System.err.println("rect=" + rect);
// System.err.println("center=" + center);
// System.err.println("pt=" + pt);
assert false;
continue;
}
final double theta = Math.atan2(center.getX() - pt.getX(), -(center.getY() - pt.getY()));
final XPoint2D middle = drawExtends(ug, inter, theta);
drawLine(ug, middle, pt);
}
for (Link link : allButSametails) {
final SvekLine line = bibliotekon.getLine(link);
final XPoint2D contact = link.getEntity1() == leaf ? line.getStartContactPoint()
: line.getEndContactPoint();
if (contact == null) {
// assert false;
continue;
}
final XPoint2D inter = intersection(rect, center, contact);
if (inter == null) {
// assert false;
continue;
}
drawLine(ug, inter, contact);
}
}
private XPoint2D drawExtends(UGraphic ug, XPoint2D contact, double theta) {
final UPolygon poly = new UPolygon();
poly.addPoint(0, 0);
poly.addPoint(7, 20);
poly.addPoint(-7, 20);
poly.rotate(theta);
final UTranslate translate = UTranslate.point(contact);
ug.apply(translate).draw(poly);
final XPoint2D p1 = translate.getTranslated(poly.getPoints().get(1));
final XPoint2D p2 = translate.getTranslated(poly.getPoints().get(2));
return new XPoint2D((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
}
static XPoint2D intersection(XRectangle2D rect, XPoint2D pt1, XPoint2D pt2) {
XPoint2D p;
p = intersection(new XPoint2D(rect.getMinX(), rect.getMinY()), new XPoint2D(rect.getMaxX(), rect.getMinY()),
pt1, pt2);
if (p != null)
return p;
p = intersection(new XPoint2D(rect.getMinX(), rect.getMaxY()), new XPoint2D(rect.getMaxX(), rect.getMaxY()),
pt1, pt2);
if (p != null)
return p;
p = intersection(new XPoint2D(rect.getMinX(), rect.getMinY()), new XPoint2D(rect.getMinX(), rect.getMaxY()),
pt1, pt2);
if (p != null)
return p;
p = intersection(new XPoint2D(rect.getMaxX(), rect.getMinY()), new XPoint2D(rect.getMaxX(), rect.getMaxY()),
pt1, pt2);
if (p != null)
return p;
return null;
}
static private XPoint2D intersection(XPoint2D pt1, XPoint2D pt2, XPoint2D pt3, XPoint2D pt4) {
// System.err.println("Checking intersection of " + pt1 + "-" + pt2 + " and " +
// pt3 + "-" + pt4);
return intersection(pt1.getX(), pt1.getY(), pt2.getX(), pt2.getY(), pt3.getX(), pt3.getY(), pt4.getX(),
pt4.getY());
}
private static final double epsilon = .001;
static private XPoint2D intersection(double x1, double y1, double x2, double y2, double x3, double y3, double x4,
double y4) {
final double d = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
if (d == 0)
return null;
final double xi = ((x3 - x4) * (x1 * y2 - y1 * x2) - (x1 - x2) * (x3 * y4 - y3 * x4)) / d;
final double yi = ((y3 - y4) * (x1 * y2 - y1 * x2) - (y1 - y2) * (x3 * y4 - y3 * x4)) / d;
final XPoint2D p = new XPoint2D(xi, yi);
if (xi + epsilon < Math.min(x1, x2) || xi - epsilon > Math.max(x1, x2))
return null;
if (xi + epsilon < Math.min(x3, x4) || xi - epsilon > Math.max(x3, x4))
return null;
if (yi + epsilon < Math.min(y1, y2) || yi - epsilon > Math.max(y1, y2))
return null;
if (yi + epsilon < Math.min(y3, y4) || yi - epsilon > Math.max(y3, y4))
return null;
return p;
}
private void drawLine(UGraphic ug, XPoint2D pt1, XPoint2D pt2) {
drawLine(ug, pt1.getX(), pt1.getY(), pt2.getX(), pt2.getY());
}
private void drawLine(UGraphic ug, double x1, double y1, double x2, double y2) {
final ULine line = new ULine(x2 - x1, y2 - y1);
ug.apply(new UTranslate(x1, y1)).draw(line);
}
}