mirror of https://github.com/octoleo/plantuml.git
142 lines
4.3 KiB
Java
142 lines
4.3 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* Project Info: http://plantuml.com
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*
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* This file is part of Smetana.
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* Smetana is a partial translation of Graphviz/Dot sources from C to Java.
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*
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* (C) Copyright 2009-2020, Arnaud Roques
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*
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* This translation is distributed under the same Licence as the original C program.
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*
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* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
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* LICENSE ("AGREEMENT"). [Eclipse Public License - v 1.0]
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*
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* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
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* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
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*
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* You may obtain a copy of the License at
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*
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package net.sourceforge.plantuml.jsondiagram;
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import java.awt.geom.Point2D;
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import java.util.ArrayList;
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import java.util.List;
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import h.ST_Agedgeinfo_t;
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import h.ST_bezier;
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import h.ST_pointf;
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import h.ST_splines;
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import net.sourceforge.plantuml.ugraphic.UEllipse;
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import net.sourceforge.plantuml.ugraphic.UGraphic;
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import net.sourceforge.plantuml.ugraphic.UPath;
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import net.sourceforge.plantuml.ugraphic.UStroke;
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import net.sourceforge.plantuml.ugraphic.UTranslate;
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import net.sourceforge.plantuml.ugraphic.color.HColor;
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public class JsonCurve {
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private final List<Point2D> points = new ArrayList<>();
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private double maxX, maxY;
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private final Mirror xMirror;
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private final double veryFirstLine;
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private final Point2D sp;
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private final Point2D ep;
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public JsonCurve(ST_Agedgeinfo_t data, Mirror xMirror, double veryFirstLine) {
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this.veryFirstLine = veryFirstLine;
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this.xMirror = xMirror;
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final ST_splines splines = data.spl;
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if (splines.size != 1) {
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throw new IllegalStateException();
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}
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final ST_bezier beziers = splines.list.get__(0);
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for (int i = 0; i < beziers.size; i++) {
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final Point2D pt = getPoint(splines, i);
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maxX = Math.max(maxX, pt.getX());
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maxY = Math.max(maxY, pt.getY());
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points.add(pt);
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}
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if (beziers.sp.x == 0 && beziers.sp.y == 0) {
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sp = null;
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} else {
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sp = new Point2D.Double(beziers.sp.x, beziers.sp.y);
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}
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if (beziers.ep.x == 0 && beziers.ep.y == 0) {
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ep = null;
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} else {
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ep = new Point2D.Double(beziers.ep.x, beziers.ep.y);
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}
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}
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private Point2D getPoint(ST_splines splines, int i) {
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final ST_bezier beziers = splines.list.get__(0);
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final ST_pointf pt = beziers.list.get__(i);
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return new Point2D.Double(pt.x, pt.y);
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}
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public void drawCurve(HColor color, UGraphic ug) {
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final UPath path = new UPath();
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path.moveTo(getVeryFirst());
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path.lineTo(xMirror.invAndXYSwitch(points.get(0)));
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for (int i = 1; i < points.size(); i += 3) {
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final Point2D pt2 = xMirror.invAndXYSwitch(points.get(i));
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final Point2D pt3 = xMirror.invAndXYSwitch(points.get(i + 1));
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final Point2D pt4 = xMirror.invAndXYSwitch(points.get(i + 2));
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path.cubicTo(pt2, pt3, pt4);
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}
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ug.draw(path);
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if (ep != null) {
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final Point2D last = xMirror.invAndXYSwitch(points.get(points.size() - 1));
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final Point2D trueEp = xMirror.invAndXYSwitch(ep);
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new Arrow(last, trueEp).drawArrow(ug.apply(color.bg()));
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}
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}
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public void drawSpot(UGraphic ug) {
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final double size = 3;
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ug = ug.apply(new UTranslate(getVeryFirst()).compose(new UTranslate(-size, -size)));
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ug.apply(new UStroke()).draw(new UEllipse(2 * size, 2 * size));
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}
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private Point2D getVeryFirst() {
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return supp(xMirror.invAndXYSwitch(points.get(0)), xMirror.invAndXYSwitch(points.get(1)), veryFirstLine);
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}
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private static Point2D supp(Point2D center, Point2D direction, double len) {
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final double full = center.distance(direction);
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final double dx = (center.getX() - direction.getX()) / full;
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final double dy = (center.getY() - direction.getY()) / full;
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return new Point2D.Double(center.getX() + dx * len, center.getY() + dy * len);
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}
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public double getMaxX() {
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return maxX;
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}
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public double getMaxY() {
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return maxY;
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}
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}
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