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/*******************************************************************************
* Copyright (c) 2010 THALES GLOBAL SERVICES.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.sequence.business.internal.operation;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.IdentityAnchor;
import org.eclipse.gmf.runtime.notation.NotationFactory;
import org.eclipse.gmf.runtime.notation.RelativeBendpoints;
import org.eclipse.gmf.runtime.notation.datatype.RelativeBendpoint;
import org.eclipse.sirius.diagram.sequence.business.internal.elements.ISequenceElementAccessor;
import org.eclipse.sirius.diagram.sequence.business.internal.elements.Message;
import org.eclipse.sirius.diagram.sequence.business.internal.layout.LayoutConstants;
import org.eclipse.sirius.diagram.sequence.util.Range;
import org.eclipse.sirius.ext.base.Option;
import com.google.common.collect.Iterables;
/**
* A helper to handle the change of vertical range for sequence messages.
*
* @author pcdavid
*/
public class SequenceMessageRangeHelper {
private static final String TOP_CENTER_TERMINAL = "(0.5, 0.0)"; //$NON-NLS-1$
/**
* Sets the range for a normal (non-reflective), horizontal message.
*
* @param edge
* the edge representing the message.
* @param range
* the final range of the message. In practice it is a range of
* width 1 for horizontal messages.
* @param sourceTop
* the logical vertical position of the top of the source element
* of the message.
* @param targetTop
* the logical vertical position of the top of the target element
* of the message.
*/
public void setMessageRangeForNormalMessage(Edge edge, Range range, final int sourceTop, final int targetTop) {
resetAnchors(edge);
RelativeBendpoints bendpoints = (RelativeBendpoints) edge.getBendpoints();
int[] sourceX = getSourceX(bendpoints);
int[] targetX = getTargetX(bendpoints);
assert sourceX != null && sourceX.length == 2;
assert targetX != null && targetX.length == 2;
/*
* The vertical offsets from the top of the source/target.
*/
int sourceDeltaY = range.getLowerBound() - sourceTop;
int targetDeltaY = range.getLowerBound() - targetTop;
List<RelativeBendpoint> newBendpoints = new ArrayList<RelativeBendpoint>();
newBendpoints.add(new RelativeBendpoint(sourceX[0], sourceDeltaY, targetX[0], targetDeltaY));
newBendpoints.add(new RelativeBendpoint(sourceX[1], sourceDeltaY, targetX[1], targetDeltaY));
bendpoints.setPoints(newBendpoints);
}
/**
* Sets the range for a reflective message.
*
* @param edge
* the edge representing the message.
* @param range
* the final range of the message. In practice it is a range of
* width 1 for horizontal messages.
* @param sourceTop
* the logical vertical position of the top of the source element
* of the message.
* @param targetTop
* the logical vertical position of the top of the target element
* of the message.
*/
public void setMessageRangeForMessageToSelf(Edge edge, Range range, final int sourceTop, final int targetTop) {
resetAnchors(edge);
RelativeBendpoints bendpoints = (RelativeBendpoints) edge.getBendpoints();
if (bendpoints.getPoints().size() == 2) {
List<RelativeBendpoint> newBendpoints = new ArrayList<RelativeBendpoint>();
RelativeBendpoint firstRB = (RelativeBendpoint) bendpoints.getPoints().get(0);
RelativeBendpoint secondRB = (RelativeBendpoint) bendpoints.getPoints().get(1);
newBendpoints.add(firstRB);
int hGap = LayoutConstants.MESSAGE_TO_SELF_BENDPOINT_HORIZONTAL_GAP;
Option<Message> msg = ISequenceElementAccessor.getMessage(edge);
if (msg.some()) {
hGap = msg.get().getReflexiveMessageWidth();
}
newBendpoints.add(new RelativeBendpoint(firstRB.getSourceX() + hGap, firstRB.getSourceY(), firstRB.getTargetX() + hGap, firstRB.getTargetY()));
newBendpoints.add(new RelativeBendpoint(firstRB.getSourceX() + hGap, secondRB.getSourceY(), firstRB.getTargetX() + hGap, secondRB.getTargetY()));
newBendpoints.add(secondRB);
bendpoints.setPoints(newBendpoints);
}
int[] sourceX = getSourceX(bendpoints);
int[] targetX = getTargetX(bendpoints);
assert sourceX != null && sourceX.length == 4;
assert targetX != null && targetX.length == 4;
/*
* The vertical offsets of the two first/top bendpoints from the top of
* the source/target.
*/
int topSourceDeltaY = range.getLowerBound() - sourceTop;
int topTargetDeltaY = range.getLowerBound() - targetTop;
/*
* The vertical offsets of the two last/bottom bendpoints from the top
* of the source/target.
*/
int bottomSourceDeltaY = range.getUpperBound() - sourceTop;
int bottomTargetDeltaY = range.getUpperBound() - targetTop;
List<RelativeBendpoint> newBendpoints = new ArrayList<RelativeBendpoint>();
newBendpoints.add(new RelativeBendpoint(sourceX[0], topSourceDeltaY, targetX[0], topTargetDeltaY));
newBendpoints.add(new RelativeBendpoint(sourceX[1], topSourceDeltaY, targetX[0], topTargetDeltaY));
newBendpoints.add(new RelativeBendpoint(sourceX[2], bottomSourceDeltaY, targetX[0], bottomTargetDeltaY));
newBendpoints.add(new RelativeBendpoint(sourceX[3], bottomSourceDeltaY, targetX[0], bottomTargetDeltaY));
bendpoints.setPoints(newBendpoints);
}
private int[] getSourceX(final RelativeBendpoints bendpoints) {
int[] sourceXs = new int[bendpoints.getPoints().size()];
int i = 0;
for (RelativeBendpoint rb : Iterables.filter(bendpoints.getPoints(), RelativeBendpoint.class)) {
sourceXs[i] = rb.getSourceX();
i += 1;
}
return sourceXs;
}
private int[] getTargetX(final RelativeBendpoints bendpoints) {
int[] targetXs = new int[bendpoints.getPoints().size()];
int i = 0;
for (RelativeBendpoint rb : Iterables.filter(bendpoints.getPoints(), RelativeBendpoint.class)) {
targetXs[i] = rb.getTargetX();
i += 1;
}
return targetXs;
}
/**
* Reset the anchors of an edge to a known, easy to handle location: the
* center of the top side of the source or target element.
*/
private void resetAnchors(Edge edge) {
edge.setSourceAnchor(createCanonicalAnchor());
edge.setTargetAnchor(createCanonicalAnchor());
}
private IdentityAnchor createCanonicalAnchor() {
IdentityAnchor anchor = NotationFactory.eINSTANCE.createIdentityAnchor();
anchor.setId(TOP_CENTER_TERMINAL);
return anchor;
}
}
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