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+/*******************************************************************************
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+ * Copyright (c) 2015 THALES GLOBAL SERVICES.
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+ * All rights reserved. This program and the accompanying materials
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+ * are made available under the terms of the Eclipse Public License v1.0
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+ * which accompanies this distribution, and is available at
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+ * http://www.eclipse.org/legal/epl-v10.html
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+ *
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+ * Contributors:
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+ * Obeo - initial API and implementation
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+ *******************************************************************************/
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+package org.yakindu.base.xtext.utils.gmf.routing;
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+
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+import java.util.List;
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+import java.util.Optional;
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+
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+import org.eclipse.draw2d.ConnectionLocator;
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+import org.eclipse.draw2d.geometry.Dimension;
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+import org.eclipse.draw2d.geometry.Point;
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+import org.eclipse.draw2d.geometry.PointList;
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+import org.eclipse.draw2d.geometry.PrecisionPoint;
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+import org.eclipse.draw2d.geometry.Straight;
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+import org.eclipse.draw2d.geometry.Transform;
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+import org.eclipse.draw2d.geometry.Vector;
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+import org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart;
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+import org.eclipse.gmf.runtime.diagram.ui.internal.util.LabelViewConstants;
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+import org.eclipse.gmf.runtime.draw2d.ui.geometry.LineSeg;
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+import org.eclipse.gmf.runtime.draw2d.ui.geometry.PointListUtilities;
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+import org.eclipse.gmf.runtime.notation.Bounds;
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+
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+/**
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+ * Utility class used to compute the position of a label according to its edge
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+ * move (old points and new points list).
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+ *
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+ * @author <a href="mailto:laurent.fasani@obeo.fr">Laurent Fasani</a>
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+ * @author <a href="mailto:laurent.redor@obeo.fr">Laurent Redor</a>
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+ */
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+@SuppressWarnings("restriction")
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+public class EdgeLabelQuery {
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+
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+ private final static double DISTANCE_TOLERANCE = 0.001;
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+
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+ /** Status for {@link #getSameLineStatus(Vector, LineSeg)} method. */
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+ private static final int NOT_ON_SAME_LINE = 0;
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+
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+ /** Status for {@link #getSameLineStatus(Vector, LineSeg)} method. */
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+ private static final int ON_SAME_LINE_SAME_DIRECTION = 1;
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+
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+ /** Status for {@link #getSameLineStatus(Vector, LineSeg)} method. */
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+ private static final int ON_SAME_LINE_OPPOSITE_DIRECTION = 2;
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+
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+ /** BendPoint list before the edge modification. */
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+ private PointList oldBendPointList;
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+
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+ /** BendPoint list corresponding to the edge modification. */
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+ private PointList newBendPointList;
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+
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+ /** The routing status of edge on which the label is. */
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+ private boolean isEdgeWithObliqueRoutingStyle;
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+
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+ /** The old offset of the label */
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+ private Point oldLabelOffset;
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+
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+ /**
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+ * The keyPoint of the label (
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+ * {@link org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart#getKeyPoint()}
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+ * ).
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+ */
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+ private Integer keyPoint;
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+
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+ private List<LineSeg> oldEdgeSegments;
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+
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+ private List<LineSeg> newEdgeSegments;
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+
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+ /**
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+ * True if the parent's label is a bracketEdge (specific locator for center
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+ * label and possibility to rotate the middle segment), false otherwise.
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+ */
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+ private boolean isOnBracketEdge;
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+
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+ /** The size of the label. */
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+ private Dimension labelSize;
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+
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+ /**
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+ * Return the default snap back position according to the keyPoint of the label.
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+ *
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+ * @param keyPoint
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+ * The keyPoint of the label (
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+ * {@link org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart#getKeyPoint()}
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+ * ).
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+ * @return the default snap back position according to the keyPoint.
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+ */
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+ public static Point getSnapBackPosition(Integer keyPoint) {
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+ return new Point();
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+ }
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+
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+ /**
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+ * Calculates the label offset from the reference point given the label center
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+ * and a points list.<BR>
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+ * {@link org.eclipse.gmf.runtime.diagram.ui.internal.figures.LabelHelper#offsetFromRelativeCoordinate(org.eclipse.draw2d.IFigure, org.eclipse.draw2d.geometry.Rectangle, Point)}
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+ *
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+ * @param labelCenter
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+ * the label center for the <code>IFigure</code> to calculate the
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+ * offset for
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+ * @param points
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+ * the <code>PointList</code> of the edge that contains the label.
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+ * The label offset is relative to this <code>PointList</code>.
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+ * @param ref
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+ * the <code>Point</code> that is the reference point that the offset
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+ * is based on.
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+ * @return a <code>Point</code> which represents a value offset from the
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+ * <code>ref</code> point oriented based on the nearest line segment.
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+ */
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+ public static Point offsetFromRelativeCoordinate(Point labelCenter, PointList points, Point ref) {
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+ Vector fromAnchorToLabelCenterPointVector = new Vector(labelCenter.x - ref.x, labelCenter.y - ref.y);
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+ @SuppressWarnings("rawtypes")
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+ List lineSegments = PointListUtilities.getLineSegments(points);
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+ LineSeg segmentContainingLabelAnchor = PointListUtilities.getNearestSegment(lineSegments, ref.x, ref.y);
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+ Vector rotatedVector = getRotatedVector(fromAnchorToLabelCenterPointVector, segmentContainingLabelAnchor,
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+ false);
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+
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+ return new PrecisionPoint(rotatedVector.x, rotatedVector.y);
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+ }
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+
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+ /**
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+ * Calculates the relative coordinate that is equivalent to the offset from the
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+ * reference point, that can be used to set the label center location. <BR>
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+ *
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+ * This is another implementation of
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+ * {@link org.eclipse.gmf.runtime.diagram.ui.internal.figures.LabelHelper#relativeCoordinateFromOffset(org.eclipse.draw2d.IFigure, Point, Point)}
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+ * . See bugzilla 476305 for more detail.
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+ *
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+ * @param points
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+ * the <code>PointList</code> of the edge that contains the label.
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+ * The label offset is relative to this <code>PointList</code>.
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+ * @param ref
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+ * a <code>Point</code> located on the parent which the offset value
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+ * is relative to.
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+ * @param offset
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+ * a <code>Point</code> which represents a value offset from the
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+ * <code>ref</code> point oriented based on the nearest line segment.
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+ * @return a <code>Point</code> that is the relative coordinate of the label
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+ * that can be used to set it's center location.
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+ */
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+ public static Point relativeCenterCoordinateFromOffset(PointList points, Point ref, Point offset) {
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+ Vector fromAnchorToLabelCenterPointVector = new Vector(offset.x, offset.y);
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+ @SuppressWarnings("rawtypes")
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+ List lineSegments = PointListUtilities.getLineSegments(points);
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+ LineSeg segmentContainingLabelAnchor = PointListUtilities.getNearestSegment(lineSegments, ref.x, ref.y);
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+ Vector rotatedVector = getRotatedVector(fromAnchorToLabelCenterPointVector, segmentContainingLabelAnchor, true);
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+
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+ return new PrecisionPoint(ref.x + rotatedVector.x, ref.y + rotatedVector.y);
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+ }
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+
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+ /**
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+ * Default constructor.
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+ *
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+ * @param oldBendPointList
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+ * Bendpoint list before the edge modification
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+ * @param newBendPointList
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+ * Bendpoint list after the edge modification
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+ * @param isEdgeWithObliqueRoutingStyle
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+ * status of the edge from which to get the previous position of the
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+ * bendpoints and from which to get the three labels
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+ * @param oldLabelOffset
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+ * The old offset.
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+ * @param labelSize
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+ * The size of the label
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+ * @param keyPoint
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+ * The keyPoint of the label (
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+ * {@link org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart#getKeyPoint()}
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+ * )
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+ * @param isOnBracketEdge
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+ * True if the parent's label is a bracketEdge (specific locator for
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+ * center label and possibility to rotate the middle segment), false
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+ * otherwise.
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+ */
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+ // @SuppressWarnings("unchecked")
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+ @SuppressWarnings("unchecked")
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+ public EdgeLabelQuery(PointList oldBendPointList, PointList newBendPointList, boolean isEdgeWithObliqueRoutingStyle,
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+ Point oldLabelOffset, Dimension labelSize, Integer keyPoint, boolean isOnBracketEdge) {
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+ this.isEdgeWithObliqueRoutingStyle = isEdgeWithObliqueRoutingStyle;
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+
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+ this.oldBendPointList = oldBendPointList;
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+ this.newBendPointList = newBendPointList;
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+ this.oldLabelOffset = oldLabelOffset;
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+ this.labelSize = labelSize;
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+ this.keyPoint = keyPoint;
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+ this.isOnBracketEdge = isOnBracketEdge;
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+
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+ // compute lineSegments from bendPoints
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+ oldEdgeSegments = PointListUtilities.getLineSegments(oldBendPointList);
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+ newEdgeSegments = PointListUtilities.getLineSegments(newBendPointList);
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+ }
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+
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+ /**
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+ * Calculate the new GMF label offset: the label offset defines the position of
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+ * the label compared to labelAnchor point. <br>
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+ * The new Label offset is computed taking into account:<br>
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+ * <ul>
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+ * <li>the label anchor point move (start, center or end)</li>
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+ * <li>the orientation of the segment owning the label anchor. Indeed, the label
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+ * offset is displayed by draw2D relatively to the direction of the edge segment
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+ * including the anchor of the label</li>
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+ * <li>the expected move of the label according to the functional
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+ * specification</li>
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+ * </ul>
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+ * .
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+ *
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+ * @return the new offset of the label
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+ */
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+ public Point calculateGMFLabelOffset() {
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+ if (areBendpointsIdentical() && areSegmentsValid()) {
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+ return oldLabelOffset;
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+ } else {
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+ int anchorPointRatio = getLocation(keyPoint);
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+ Point oldAnchorPoint = getAnchorPoint(oldBendPointList, anchorPointRatio);
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+ Point oldLabelCenter = relativeCenterCoordinateFromOffset(oldBendPointList, oldAnchorPoint, oldLabelOffset);
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+
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+ Point newAnchorPoint = getAnchorPoint(newBendPointList, anchorPointRatio);
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+
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+ Point newLabelCenter = calculateNewCenterLocation(oldLabelCenter,
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+ getStandardLabelCenterLocation(newBendPointList, keyPoint));
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+ return offsetFromRelativeCoordinate(newLabelCenter, newBendPointList, newAnchorPoint);
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+ }
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+ }
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+
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+ private Point getAnchorPoint(PointList pointList, int anchorPointRatio) {
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+ return PointListUtilities.calculatePointRelativeToLine(pointList, 0, anchorPointRatio, true);
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+ }
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+
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+ /**
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+ * Check if all segments of new and old points are valid (no segment with same
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+ * origin and terminus).
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+ *
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+ * @return true if segments are valid, false otherwise.
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+ */
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+ private boolean areSegmentsValid() {
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+ boolean areSegmentsValid = true;
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+ for (LineSeg lineSeg : newEdgeSegments) {
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+ if (lineSeg.getOrigin().equals(lineSeg.getTerminus())) {
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+ areSegmentsValid = false;
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+ break;
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+ }
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+ }
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+
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+ if (areSegmentsValid) {
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+ for (LineSeg lineSeg : oldEdgeSegments) {
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+ if (lineSeg.getOrigin().equals(lineSeg.getTerminus())) {
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+ areSegmentsValid = false;
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+ break;
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+ }
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+ }
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+ }
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+ return areSegmentsValid;
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+ }
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+
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+ /**
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+ * Check if the old points and the new one are the same.
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+ *
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+ * @return true if the old points are the same as the new, false otherwise.
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+ */
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+ private boolean areBendpointsIdentical() {
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+ boolean areBendpointsIdentical = true;
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+ if (newBendPointList.size() == oldBendPointList.size()) {
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+ for (int i = 0; i < newBendPointList.size(); i++) {
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+ Point newPoint = newBendPointList.getPoint(i);
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+ Point oldPoint = oldBendPointList.getPoint(i);
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+ if (!newPoint.equals(oldPoint)) {
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+ areBendpointsIdentical = false;
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+ break;
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+ }
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+ }
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+ } else {
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+ areBendpointsIdentical = false;
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+ }
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+
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+ return areBendpointsIdentical;
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+ }
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+
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+ /**
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+ * Calculate the new center location of the label according to functional
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+ * specification.
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+ *
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+ * @param oldCenterLabel
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+ * The old center location of the label.
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+ * @param newDefaultLocation
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+ * The standard center location according to the label keyPoint (
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+ * {@link org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart#getKeyPoint()}
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+ * and the default snap back position (
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+ * {@link LabelEditPart#getSnapBackPosition(String)}.
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+ * @return
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+ */
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+ private Point calculateNewCenterLocation(Point oldCenterLabel, Point newDefaultLocation) {
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+ Vector fromOldToNewCenterVector = null;
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+
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+ // Step 1 : Calculate old reference point (the nearest point on the edge
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+ // from the center of the label).
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+ LineSeg oldNearestSeg = PointListUtilities.getNearestSegment(oldEdgeSegments, oldCenterLabel.x,
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+ oldCenterLabel.y);
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+ Point oldNearestPoint = oldNearestSeg.perpIntersect(oldCenterLabel.x, oldCenterLabel.y);
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+
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+ // Step 2 : Is there a new segment and an old segment on the same line?
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+ // Case of segment increased or decreased (and eventually inverted)
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+ Optional<Vector> fromOldToNewRefPoint = getVectorFromOldToNewForSegmentsOnSameLine(oldNearestSeg,
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+ oldNearestPoint, oldCenterLabel);
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+ if (fromOldToNewRefPoint.isPresent()) {
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+ // In this case the vector for the reference point is the same than
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+ // for the label center.
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+ fromOldToNewCenterVector = fromOldToNewRefPoint.get();
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+ } else { // No identical segment line has been found
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+ // RECTILINEAR and TREE routing
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+ if (!isEdgeWithObliqueRoutingStyle) {
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+ // Get projection of oldNearestPoint on newSegments along
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+ // oldRefVector
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+ LineSeg oldRefVectorIntoSegment = null;
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+ if (oldCenterLabel.equals(oldNearestPoint)) {
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+ // Get a segment perpendicular to oldRefSegment going
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+ // through oldNearestPoint
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+ oldRefVectorIntoSegment = new LineSeg(oldNearestPoint,
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+ new PrecisionPoint(
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+ oldNearestPoint.x + (oldNearestSeg.getOrigin().y - oldNearestSeg.getTerminus().y),
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+ oldNearestPoint.y - (oldNearestSeg.getOrigin().x - oldNearestSeg.getTerminus().x)));
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+ } else {
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+ oldRefVectorIntoSegment = new LineSeg(oldCenterLabel, oldNearestPoint);
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+ }
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+
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+ // Is there a new segment at the same index as old segment and
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+ // with same axis? Case of rectilinear segment move.
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+ fromOldToNewCenterVector = getVectorForSegmentMoveCase(oldNearestSeg, oldNearestPoint, oldCenterLabel);
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+ if (fromOldToNewCenterVector == null && isOnBracketEdge) {
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+ // Is there a new segment at the same index as old segment
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+ // and with opposite axis? Case of change orientation of the
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+ // bracket edge
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+ fromOldToNewCenterVector = getVectorForBracketEdgeOrientationChangeCase(oldNearestSeg,
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+ oldNearestPoint, oldCenterLabel);
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+ }
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+ if (fromOldToNewCenterVector == null) {
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+ for (LineSeg lineSeg : newEdgeSegments) {
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+ PointList linesIntersections = oldRefVectorIntoSegment.getLinesIntersections(lineSeg);
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+ // intersection should be, at more, one point
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+ if (linesIntersections.size() == 1 && lineSeg.distanceToPoint(linesIntersections.getPoint(0).x,
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+ linesIntersections.getPoint(0).y) <= Math.sqrt(2)) {
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+ Vector tempLabelMove = new Vector(linesIntersections.getPoint(0).x - oldNearestPoint.x,
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+ linesIntersections.getPoint(0).y - oldNearestPoint.y);
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+ if (fromOldToNewCenterVector == null
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+ || tempLabelMove.getLength() < fromOldToNewCenterVector.getLength()) {
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+ fromOldToNewCenterVector = tempLabelMove;
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+ }
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+ }
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+ }
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+ // Compare the minimalLabelMove with the default location.
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+ // If the default location is nearer reset the labelMove.
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+ Vector fromOldNearestPointToStandardLocation = new Vector(newDefaultLocation.x - oldNearestPoint.x,
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+ newDefaultLocation.y - oldNearestPoint.y);
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+ if (fromOldToNewCenterVector == null || fromOldNearestPointToStandardLocation
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+ .getLength() < fromOldToNewCenterVector.getLength()) {
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+ fromOldToNewCenterVector = null;
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+ }
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+ }
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+ } else if (newEdgeSegments.size() == oldEdgeSegments.size()) {
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+ // The newNearestSegment as the same index in
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+ // newEdgeSegments than oldNearestSegment in oldEdgeSegments
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+ LineSeg newRefSeg = newEdgeSegments.get(oldEdgeSegments.indexOf(oldNearestSeg));
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+ // Keep ratio on segment for newRefPoint
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+ double oldRatio = oldNearestSeg.projection(oldCenterLabel.x, oldCenterLabel.y);
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+ Point newRefPoint = new PrecisionPoint(
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+ newRefSeg.getOrigin().x + oldRatio * (newRefSeg.getTerminus().x - newRefSeg.getOrigin().x),
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|
|
+ newRefSeg.getOrigin().y + oldRatio * (newRefSeg.getTerminus().y - newRefSeg.getOrigin().y));
|
|
|
+ fromOldToNewCenterVector = new Vector(newRefPoint.x - oldNearestPoint.x,
|
|
|
+ newRefPoint.y - oldNearestPoint.y);
|
|
|
+
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (fromOldToNewCenterVector == null) {
|
|
|
+ return newDefaultLocation;
|
|
|
+ } else {
|
|
|
+ return oldCenterLabel.getTranslated(fromOldToNewCenterVector.x, fromOldToNewCenterVector.y);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Check if we are in case of a rectilinear segment move: there is a new segment
|
|
|
+ * at the same index as old nearest segment and with the same axis. Return the
|
|
|
+ * corresponding vector from old to new center in this case, null otherwise.
|
|
|
+ *
|
|
|
+ * @param oldNearestSeg
|
|
|
+ * The segment that is the nearest from the center of the label in
|
|
|
+ * the old points list.
|
|
|
+ * @return the corresponding vector from old to new center in case of
|
|
|
+ * rectilinear segment move, null otherwise.
|
|
|
+ */
|
|
|
+ private Vector getVectorForSegmentMoveCase(LineSeg oldNearestSeg, Point oldNearestPoint, Point oldCenterLabel) {
|
|
|
+ Vector fromOldToNewCenterVector = null;
|
|
|
+ if (newEdgeSegments.size() == oldEdgeSegments.size()) {
|
|
|
+ int index = oldEdgeSegments.indexOf(oldNearestSeg);
|
|
|
+ LineSeg newNearestSegment = newEdgeSegments.get(index);
|
|
|
+ if (oldNearestSeg.isHorizontal() == newNearestSegment.isHorizontal()) {
|
|
|
+ Vector oldVector = new Vector(oldNearestSeg.getTerminus().x - oldNearestSeg.getOrigin().x,
|
|
|
+ oldNearestSeg.getTerminus().y - oldNearestSeg.getOrigin().y);
|
|
|
+ Vector newVector = new Vector(newNearestSegment.getTerminus().x - newNearestSegment.getOrigin().x,
|
|
|
+ newNearestSegment.getTerminus().y - newNearestSegment.getOrigin().y);
|
|
|
+ fromOldToNewCenterVector = applyOldRatioOnNewSegment(oldNearestSeg, oldNearestPoint, oldCenterLabel,
|
|
|
+ newNearestSegment, oldVector.getAngle(newVector) == 180, false);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return fromOldToNewCenterVector;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Check if we are in case of a orientation segment change: there is a new
|
|
|
+ * segment at the same index as old nearest segment and with apposite axis.
|
|
|
+ * Return the corresponding vector from old to new center in this case, null
|
|
|
+ * otherwise.
|
|
|
+ *
|
|
|
+ * @param oldNearestSeg
|
|
|
+ * The segment that is the nearest from the center of the label in
|
|
|
+ * the old points list.
|
|
|
+ * @return the corresponding vector from old to new center in case of
|
|
|
+ * orientation segment change, null otherwise.
|
|
|
+ */
|
|
|
+ private Vector getVectorForBracketEdgeOrientationChangeCase(LineSeg oldNearestSeg, Point oldNearestPoint,
|
|
|
+ Point oldCenterLabel) {
|
|
|
+ Vector fromOldToNewCenterVector = null;
|
|
|
+ if (newEdgeSegments.size() == oldEdgeSegments.size()) {
|
|
|
+ int index = oldEdgeSegments.indexOf(oldNearestSeg);
|
|
|
+ LineSeg newNearestSegment = newEdgeSegments.get(index);
|
|
|
+ if (oldNearestSeg.isHorizontal() != newNearestSegment.isHorizontal()) {
|
|
|
+ Vector oldVector = new Vector(oldNearestSeg.getTerminus().x - oldNearestSeg.getOrigin().x,
|
|
|
+ oldNearestSeg.getTerminus().y - oldNearestSeg.getOrigin().y);
|
|
|
+ Vector newVector = new Vector(newNearestSegment.getTerminus().x - newNearestSegment.getOrigin().x,
|
|
|
+ newNearestSegment.getTerminus().y - newNearestSegment.getOrigin().y);
|
|
|
+ double angleInDegree = Math.toDegrees(angleBetween2Lines(oldVector, newVector));
|
|
|
+ fromOldToNewCenterVector = applyOldRatioOnNewOrthogonalSegment(oldNearestSeg, oldNearestPoint,
|
|
|
+ oldCenterLabel, newNearestSegment, angleInDegree == 90 || angleInDegree == -270);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return fromOldToNewCenterVector;
|
|
|
+ }
|
|
|
+
|
|
|
+ private Optional<Vector> getVectorFromOldToNewForSegmentsOnSameLine(LineSeg oldRefSeg, Point oldRefPoint,
|
|
|
+ Point oldCenterLabel) {
|
|
|
+ Optional<Vector> result = Optional.empty();
|
|
|
+ LineSeg newSegmentOnSameLineWithSameDirection = null;
|
|
|
+ LineSeg newSegmentOnSameLineWithOppositeDirection = null;
|
|
|
+ // Firstly, for points lists with same nb of segments, search if the
|
|
|
+ // vector, at
|
|
|
+ // the same index, is on the same line
|
|
|
+ int sameLineStatus = NOT_ON_SAME_LINE;
|
|
|
+ if (newEdgeSegments.size() == oldEdgeSegments.size()) {
|
|
|
+ LineSeg newSegAtSameIndex = newEdgeSegments.get(oldEdgeSegments.indexOf(oldRefSeg));
|
|
|
+ sameLineStatus = getSameLineStatus(oldRefSeg, newSegAtSameIndex);
|
|
|
+ if (ON_SAME_LINE_SAME_DIRECTION == sameLineStatus) {
|
|
|
+ newSegmentOnSameLineWithSameDirection = newSegAtSameIndex;
|
|
|
+ } else if (ON_SAME_LINE_OPPOSITE_DIRECTION == sameLineStatus) {
|
|
|
+ newSegmentOnSameLineWithOppositeDirection = newSegAtSameIndex;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (NOT_ON_SAME_LINE == sameLineStatus) {
|
|
|
+ // If this is not the case search on all new segments.
|
|
|
+ for (LineSeg newSeg : newEdgeSegments) {
|
|
|
+ sameLineStatus = getSameLineStatus(oldRefSeg, newSeg);
|
|
|
+ if (ON_SAME_LINE_SAME_DIRECTION == sameLineStatus) {
|
|
|
+ newSegmentOnSameLineWithSameDirection = newSeg;
|
|
|
+ break;
|
|
|
+ } else if (ON_SAME_LINE_OPPOSITE_DIRECTION == sameLineStatus) {
|
|
|
+ newSegmentOnSameLineWithOppositeDirection = newSeg;
|
|
|
+ // Continue to search a potential segment in the same
|
|
|
+ // direction.
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ LineSeg newRefSeg = newSegmentOnSameLineWithSameDirection;
|
|
|
+ if (newRefSeg == null) {
|
|
|
+ newRefSeg = newSegmentOnSameLineWithOppositeDirection;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (newRefSeg != null) {
|
|
|
+ result = Optional.of(applyOldRatioOnNewSegment(oldRefSeg, oldRefPoint, oldCenterLabel, newRefSeg,
|
|
|
+ newSegmentOnSameLineWithOppositeDirection != null, true));
|
|
|
+ }
|
|
|
+ return result;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Check if the <code>segment</code> is on the same line as the
|
|
|
+ * <code>referenceSegment</code> and if it is in the same direction or not.
|
|
|
+ *
|
|
|
+ * @param referenceSegment
|
|
|
+ * The reference segment.
|
|
|
+ * @param segment
|
|
|
+ * The segment to test
|
|
|
+ * @return one of these statuses {@link #NOT_ON_SAME_LINE},
|
|
|
+ * {@link #ON_SAME_LINE_SAME_DIRECTION} or
|
|
|
+ * {@link #ON_SAME_LINE_OPPOSITE_DIRECTION}.
|
|
|
+ */
|
|
|
+ private int getSameLineStatus(LineSeg referenceSegment, LineSeg segment) {
|
|
|
+ int result = NOT_ON_SAME_LINE;
|
|
|
+ if (segment.length() != 0) {
|
|
|
+ Vector referenceVector = new Vector(referenceSegment.getTerminus().x - referenceSegment.getOrigin().x,
|
|
|
+ referenceSegment.getTerminus().y - referenceSegment.getOrigin().y);
|
|
|
+ Vector vector = new Vector(segment.getTerminus().x - segment.getOrigin().x,
|
|
|
+ segment.getTerminus().y - segment.getOrigin().y);
|
|
|
+ double angle = referenceVector.getAngle(vector);
|
|
|
+ if (angle == 0 || angle == 180) {
|
|
|
+ Straight straight = new Straight(new PrecisionPoint(segment.getOrigin()),
|
|
|
+ new PrecisionPoint(segment.getTerminus()));
|
|
|
+ double distToInfiniteLine = straight
|
|
|
+ .getDistance(new Vector(referenceSegment.getOrigin().x, referenceSegment.getOrigin().y));
|
|
|
+ if (distToInfiniteLine < DISTANCE_TOLERANCE) {
|
|
|
+ if (angle == 180) {
|
|
|
+ result = ON_SAME_LINE_OPPOSITE_DIRECTION;
|
|
|
+ } else {
|
|
|
+ result = ON_SAME_LINE_SAME_DIRECTION;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return result;
|
|
|
+ }
|
|
|
+
|
|
|
+ private Vector applyOldRatioOnNewSegment(LineSeg oldRefSeg, Point oldRefPoint, Point oldCenterLabel,
|
|
|
+ LineSeg newRefSeg, boolean oppositeDirection, boolean sameLine) {
|
|
|
+ Vector result;
|
|
|
+ double newRatio = newRefSeg.projection(oldCenterLabel.x, oldCenterLabel.y);
|
|
|
+ if (sameLine && newRatio >= 0 && newRatio <= 1) {
|
|
|
+ // If the orthogonal projection is inside segment (between 0 and
|
|
|
+ // 1), the reference point does not move.
|
|
|
+ result = new Vector(0, 0);
|
|
|
+ } else {
|
|
|
+ Point newRefPoint;
|
|
|
+ double oldRatio = oldRefSeg.projection(oldCenterLabel.x, oldCenterLabel.y);
|
|
|
+ if (!oppositeDirection) {
|
|
|
+ newRefPoint = new PrecisionPoint(
|
|
|
+ newRefSeg.getOrigin().x + oldRatio * (newRefSeg.getTerminus().x - newRefSeg.getOrigin().x),
|
|
|
+ newRefSeg.getOrigin().y + oldRatio * (newRefSeg.getTerminus().y - newRefSeg.getOrigin().y));
|
|
|
+ } else {
|
|
|
+ newRefPoint = new PrecisionPoint(
|
|
|
+ newRefSeg.getOrigin().x - oldRatio * (newRefSeg.getOrigin().x - newRefSeg.getTerminus().x),
|
|
|
+ newRefSeg.getOrigin().y - oldRatio * (newRefSeg.getOrigin().y - newRefSeg.getTerminus().y));
|
|
|
+ }
|
|
|
+ if (!sameLine && newRatio >= 0 && newRatio <= 1) {
|
|
|
+ // If the orthogonal projection is inside segment (between 0 and
|
|
|
+ // 1), we keep the oldRefPoint one axis
|
|
|
+ if (newRefSeg.isHorizontal()) {
|
|
|
+ newRefPoint.setX(oldRefPoint.x);
|
|
|
+ } else {
|
|
|
+ newRefPoint.setY(oldRefPoint.y);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ Vector vectorFromOldToNewRefPoint = new Vector(newRefPoint.x - oldRefPoint.x,
|
|
|
+ newRefPoint.y - oldRefPoint.y);
|
|
|
+ if (oldRatio >= 0 && oldRatio <= 1) {
|
|
|
+ // Keep ratio on segment for newRefPoint (if it was
|
|
|
+ // previously inside segment)
|
|
|
+ result = vectorFromOldToNewRefPoint;
|
|
|
+ } else {
|
|
|
+ // If the label is previously outside of the segment, we
|
|
|
+ // keep the shortest point (new or old one).
|
|
|
+ Point potentialNewCenter = oldCenterLabel.getTranslated(vectorFromOldToNewRefPoint.x,
|
|
|
+ vectorFromOldToNewRefPoint.y);
|
|
|
+ if ((newRatio > 1 && newRatio < newRefSeg.projection(potentialNewCenter.x, potentialNewCenter.y))
|
|
|
+ || (newRatio < 0
|
|
|
+ && newRatio > newRefSeg.projection(potentialNewCenter.x, potentialNewCenter.y))) {
|
|
|
+ result = new Vector(0, 0);
|
|
|
+ } else {
|
|
|
+ result = vectorFromOldToNewRefPoint;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return result;
|
|
|
+ }
|
|
|
+
|
|
|
+ private Vector applyOldRatioOnNewOrthogonalSegment(LineSeg oldRefSeg, Point oldRefPoint, Point oldCenterLabel,
|
|
|
+ LineSeg newRefSeg, boolean is90Angle) {
|
|
|
+ double oldRatio = oldRefSeg.projection(oldCenterLabel.x, oldCenterLabel.y);
|
|
|
+ Transform rotateTransform = new Transform();
|
|
|
+ // Get the new reference point and the rotation to apply
|
|
|
+ Point newRefPoint;
|
|
|
+ if (is90Angle) {
|
|
|
+ // As GMF coordinates system is reversed (y positive orientation is
|
|
|
+ // from top to bottom), we reverse the rotation to apply
|
|
|
+ rotateTransform.setRotation(Math.toRadians(-90));
|
|
|
+ if (0 <= oldRatio && oldRatio <= 1) {
|
|
|
+ // Apply same ratio on the new segment to compute the new
|
|
|
+ // reference point
|
|
|
+ newRefPoint = new PrecisionPoint(
|
|
|
+ newRefSeg.getOrigin().x - oldRatio * (newRefSeg.getOrigin().x - newRefSeg.getTerminus().x),
|
|
|
+ newRefSeg.getOrigin().y - oldRatio * (newRefSeg.getOrigin().y - newRefSeg.getTerminus().y));
|
|
|
+ } else if (oldRatio > 1) {
|
|
|
+ // Just apply the vector from old terminus to old reference
|
|
|
+ // point to the new terminus
|
|
|
+ Vector vectorFromOldTerminusToOldRefPoint = new Vector(oldRefPoint.x - oldRefSeg.getTerminus().x,
|
|
|
+ oldRefPoint.y - oldRefSeg.getTerminus().y);
|
|
|
+ Point vectorFromNewTerminusToNewRefPoint = rotateTransform
|
|
|
+ .getTransformed(vectorFromOldTerminusToOldRefPoint.toPoint());
|
|
|
+ newRefPoint = newRefSeg.getTerminus().getTranslated(vectorFromNewTerminusToNewRefPoint);
|
|
|
+ } else {
|
|
|
+ Vector vectorFromOldOriginToOldRefPoint = new Vector(oldRefPoint.x - oldRefSeg.getOrigin().x,
|
|
|
+ oldRefPoint.y - oldRefSeg.getOrigin().y);
|
|
|
+ Point vectorFromNewOriginToNewRefPoint = rotateTransform
|
|
|
+ .getTransformed(vectorFromOldOriginToOldRefPoint.toPoint());
|
|
|
+ newRefPoint = newRefSeg.getOrigin().getTranslated(vectorFromNewOriginToNewRefPoint);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // As GMF coordinates system is reversed (y positive orientation is
|
|
|
+ // from top to bottom), we reverse the rotation to apply
|
|
|
+ rotateTransform.setRotation(Math.toRadians(90));
|
|
|
+ if (0 <= oldRatio && oldRatio <= 1) {
|
|
|
+ // Apply same ratio on the new segment to compute the new
|
|
|
+ // reference point (but inverse the origin and the terminus)
|
|
|
+ newRefPoint = new PrecisionPoint(
|
|
|
+ newRefSeg.getOrigin().x + oldRatio * (newRefSeg.getTerminus().x - newRefSeg.getOrigin().x),
|
|
|
+ newRefSeg.getOrigin().y + oldRatio * (newRefSeg.getTerminus().y - newRefSeg.getOrigin().y));
|
|
|
+ } else if (oldRatio > 1) {
|
|
|
+ // Just apply the vector from old terminus to old reference
|
|
|
+ // point to the new terminus
|
|
|
+ Vector vectorFromOldTerminusToOldRefPoint = new Vector(oldRefPoint.x - oldRefSeg.getTerminus().x,
|
|
|
+ oldRefPoint.y - oldRefSeg.getTerminus().y);
|
|
|
+ Point vectorFromNewTerminusToNewRefPoint = rotateTransform
|
|
|
+ .getTransformed(vectorFromOldTerminusToOldRefPoint.toPoint());
|
|
|
+ newRefPoint = newRefSeg.getTerminus().getTranslated(vectorFromNewTerminusToNewRefPoint);
|
|
|
+ } else {
|
|
|
+ Vector vectorFromOldOriginToOldRefPoint = new Vector(oldRefPoint.x - oldRefSeg.getOrigin().x,
|
|
|
+ oldRefPoint.y - oldRefSeg.getOrigin().y);
|
|
|
+ Point vectorFromNewOriginToNewRefPoint = rotateTransform
|
|
|
+ .getTransformed(vectorFromOldOriginToOldRefPoint.toPoint());
|
|
|
+ newRefPoint = newRefSeg.getOrigin().getTranslated(vectorFromNewOriginToNewRefPoint);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ Vector vectorFromOldRefPointToOldCenterLabel = new Vector(oldCenterLabel.x - oldRefPoint.x,
|
|
|
+ oldCenterLabel.y - oldRefPoint.y);
|
|
|
+ Point fromNewRefPointToNewCenterLabel = rotateTransform
|
|
|
+ .getTransformed(vectorFromOldRefPointToOldCenterLabel.toPoint());
|
|
|
+ // Adjust the vector to apply according to orientation change (width
|
|
|
+ // becomes height and conversely)
|
|
|
+ if (newRefSeg.isHorizontal()) {
|
|
|
+ if (0 <= oldRatio && oldRatio <= 1) {
|
|
|
+ int invertedWidthHeight = labelSize.width - labelSize.height;
|
|
|
+ if (newRefSeg.getOrigin().x > newRefSeg.getTerminus().x) {
|
|
|
+ invertedWidthHeight = -invertedWidthHeight;
|
|
|
+ }
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(0, invertedWidthHeight / 2);
|
|
|
+ } else if (oldRatio > 1) {
|
|
|
+ int invertedWidthHeight = labelSize.width - labelSize.height;
|
|
|
+ if (newRefSeg.getOrigin().x > newRefSeg.getTerminus().x) {
|
|
|
+ invertedWidthHeight = -invertedWidthHeight;
|
|
|
+ }
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(invertedWidthHeight / 2, 0);
|
|
|
+ } else {
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(0, 0);
|
|
|
+ int invertedWidthHeight = labelSize.width - labelSize.height;
|
|
|
+ if (newRefSeg.getOrigin().x < newRefSeg.getTerminus().x) {
|
|
|
+ invertedWidthHeight = -invertedWidthHeight;
|
|
|
+ }
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(invertedWidthHeight / 2, 0);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ if (0 <= oldRatio && oldRatio <= 1) {
|
|
|
+ int invertedWidthHeight = labelSize.width - labelSize.height;
|
|
|
+ if (newRefSeg.getOrigin().y > newRefSeg.getTerminus().y) {
|
|
|
+ invertedWidthHeight = -invertedWidthHeight;
|
|
|
+ }
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(invertedWidthHeight / 2, 0);
|
|
|
+ } else if (oldRatio > 1) {
|
|
|
+ int invertedWidthHeight = labelSize.height - labelSize.width;
|
|
|
+ if (newRefSeg.getOrigin().y > newRefSeg.getTerminus().y) {
|
|
|
+ invertedWidthHeight = -invertedWidthHeight;
|
|
|
+ }
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(0, invertedWidthHeight / 2);
|
|
|
+ } else {
|
|
|
+ int invertedWidthHeight = labelSize.height - labelSize.width;
|
|
|
+ if (newRefSeg.getOrigin().y < newRefSeg.getTerminus().y) {
|
|
|
+ invertedWidthHeight = -invertedWidthHeight;
|
|
|
+ }
|
|
|
+ fromNewRefPointToNewCenterLabel.translate(0, invertedWidthHeight / 2);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // Apply the rotated vector on new reference point to have the new
|
|
|
+ // center
|
|
|
+ Point newCenterLabel = newRefPoint.getTranslated(fromNewRefPointToNewCenterLabel);
|
|
|
+ // Compute the vector from old center to new center
|
|
|
+ return new Vector(newCenterLabel.x - oldCenterLabel.x, newCenterLabel.y - oldCenterLabel.y);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the rotated vector according to the segment orientation.
|
|
|
+ *
|
|
|
+ * @param vector
|
|
|
+ * vector to be rotated
|
|
|
+ * @param segment
|
|
|
+ * reference segment
|
|
|
+ * @param inverseRotation
|
|
|
+ * if true, inverse rotation
|
|
|
+ * @return the rotated Vector
|
|
|
+ */
|
|
|
+ private static Vector getRotatedVector(Vector vector, LineSeg segment, boolean inverseRotation) {
|
|
|
+ Vector result = new Vector(vector.x, vector.y);
|
|
|
+ if (vector.x != 0 || vector.y != 0) {
|
|
|
+ double angle = angleBetween2Lines(new LineSeg(new Point(0, 0), new Point(1, 0)), segment)
|
|
|
+ * (inverseRotation ? -1 : 1);
|
|
|
+ Transform rotateTransform = new Transform();
|
|
|
+ rotateTransform.setRotation(angle);
|
|
|
+ Point rotatedPoint = rotateTransform.getTransformed(vector.toPoint());
|
|
|
+
|
|
|
+ result.x = rotatedPoint.x;
|
|
|
+ result.y = rotatedPoint.y;
|
|
|
+ }
|
|
|
+ return result;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the signed angle between two segments.
|
|
|
+ *
|
|
|
+ * @param line1
|
|
|
+ * @param line2
|
|
|
+ * @return the signed angle in radian.
|
|
|
+ */
|
|
|
+ private static double angleBetween2Lines(LineSeg line1, LineSeg line2) {
|
|
|
+ if (line1 == null || line2 == null) {
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+ double angle1 = Math.atan2(line1.getOrigin().y - line1.getTerminus().y,
|
|
|
+ line1.getOrigin().x - line1.getTerminus().x);
|
|
|
+ double angle2 = Math.atan2(line2.getOrigin().y - line2.getTerminus().y,
|
|
|
+ line2.getOrigin().x - line2.getTerminus().x);
|
|
|
+ return angle1 - angle2;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the signed angle between two vectors.
|
|
|
+ *
|
|
|
+ * @param vector1
|
|
|
+ * The first vector
|
|
|
+ * @param vector2
|
|
|
+ * The second vector
|
|
|
+ * @return the signed angle in radian.
|
|
|
+ */
|
|
|
+ private static double angleBetween2Lines(Vector vector1, Vector vector2) {
|
|
|
+ if (vector1 == null || vector2 == null) {
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+ double angle1 = Math.atan2(vector1.y, vector1.x);
|
|
|
+ double angle2 = Math.atan2(vector2.y, vector2.x);
|
|
|
+ return angle1 - angle2;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the standard center location according to the label keyPoint (
|
|
|
+ * {@link org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart#getKeyPoint()}
|
|
|
+ * ) and the default snap back position (
|
|
|
+ * {@link LabelEditPart#getSnapBackPosition(String)}
|
|
|
+ *
|
|
|
+ * @param pointsList
|
|
|
+ * The points of the edge of the label.
|
|
|
+ * @param keyPoint
|
|
|
+ * The keyPoint of the label (
|
|
|
+ * {@link org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart#getKeyPoint()}
|
|
|
+ * ).
|
|
|
+ * @return The center of the label {@link Bounds} if this label is located by
|
|
|
+ * default.
|
|
|
+ */
|
|
|
+ private Point getStandardLabelCenterLocation(PointList pointsList, Integer keyPoint) {
|
|
|
+ int percentage = getLocation(keyPoint);
|
|
|
+ Point newAnchorPoint = getAnchorPoint(pointsList, percentage);
|
|
|
+ Point snapBackPosition = getSnapBackPosition(keyPoint);
|
|
|
+ Point standardLabelCenter = newAnchorPoint.getTranslated(snapBackPosition);
|
|
|
+ return standardLabelCenter;
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the location among {@link LabelViewConstants} constants where to relocate
|
|
|
+ * the label figure.
|
|
|
+ *
|
|
|
+ * @return the location among {@link LabelViewConstants} constants
|
|
|
+ */
|
|
|
+ private static int getLocation(Integer keyPoint) {
|
|
|
+ int location = LabelViewConstants.MIDDLE_LOCATION;
|
|
|
+ switch (keyPoint) {
|
|
|
+ case ConnectionLocator.SOURCE:
|
|
|
+ location = LabelViewConstants.TARGET_LOCATION;
|
|
|
+ break;
|
|
|
+ case ConnectionLocator.TARGET:
|
|
|
+ location = LabelViewConstants.SOURCE_LOCATION;
|
|
|
+ break;
|
|
|
+ case ConnectionLocator.MIDDLE:
|
|
|
+ location = LabelViewConstants.MIDDLE_LOCATION;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ location = LabelViewConstants.MIDDLE_LOCATION;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ return location;
|
|
|
+ }
|
|
|
+}
|
andreas muelder