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/*****************************************************************************
* Copyright (c) 2010 CEA
*
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Soyatec - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence.edit.parts;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import org.eclipse.draw2d.Connection;
import org.eclipse.draw2d.Graphics;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.requests.ReconnectRequest;
import org.eclipse.gmf.runtime.diagram.ui.editparts.ConnectionNodeEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.ITreeBranchEditPart;
import org.eclipse.gmf.runtime.draw2d.ui.figures.PolylineConnectionEx;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.uml.diagram.sequence.edit.policies.AnnotatedLinkEndpointEditPolicy;
/**
* Abstract link class for connections with Comment, Constraint and Observations.
*
* @author Jin Liu (jin.liu@soyatec.com)
*/
public abstract class AnnotatedLinkEditPart extends org.eclipse.papyrus.infra.gmfdiag.common.editpart.ConnectionEditPart implements ITreeBranchEditPart {
/**
* Constructor.
*
* @param view
*/
public AnnotatedLinkEditPart(View view) {
super(view);
}
@Override
protected Connection createConnectionFigure() {
return new AnnotatedLinkDescriptor();
}
public AnnotatedLinkDescriptor getPrimaryShape() {
return (AnnotatedLinkDescriptor) getFigure();
}
@Override
protected void handleNotificationEvent(Notification notification) {
super.handleNotificationEvent(notification);
Object feature = notification.getFeature();
if (NotationPackage.eINSTANCE.getLineStyle_LineWidth().equals(feature)) {
refreshLineWidth();
}
}
@Override
public EditPart getTargetEditPart(Request request) {
EditPart ep = super.getTargetEditPart(request);
if (ep != null && ep instanceof org.eclipse.gef.ConnectionEditPart) {
if (request instanceof ReconnectRequest) {
ReconnectRequest rRequest = (ReconnectRequest) request;
// If this is just moving an anchor point on the same target or
// source, then it is fine. See bugzilla# 208408.
if (rRequest.isMovingStartAnchor()) {
if (rRequest.getConnectionEditPart().getSource() == ep) {
return ep;
}
} else if (rRequest.getConnectionEditPart().getTarget() == ep) {
return ep;
}
// If source anchor is moved, the connection's source edit part
// should not be taken into account for a cyclic dependency
// check so as to avoid false checks. Same goes for the target
// anchor. See bugzilla# 155243 -- we do not want to target a
// connection that is already connected to us so that we do not
// introduce a cyclic connection
if (isCyclicConnectionRequest((org.eclipse.gef.ConnectionEditPart) ep, rRequest.getConnectionEditPart(), false, rRequest.isMovingStartAnchor())) {
return null;
}
}
}
return ep;
}
private boolean isCyclicConnectionRequest(org.eclipse.gef.ConnectionEditPart targetCEP, org.eclipse.gef.ConnectionEditPart sourceCEP, boolean checkSourceAndTargetEditParts, boolean doNotCheckSourceEditPart) {
if (targetCEP == null || sourceCEP == null) {
return false;
}
if (sourceCEP == targetCEP) {
return true;
}
// first, do a cyclic check on source and target connections
// of the source connection itself.
// (as every connection is also a node).
HashSet set = new HashSet();
getSourceAndTargetConnections(set, sourceCEP);
if (set.contains(targetCEP.getFigure())) {
return true;
}
// now do the cyclic check on the source and target of the source connection...
EditPart sourceEP = sourceCEP.getSource(), targetEP = sourceCEP.getTarget();
if ((sourceEP == targetCEP) || (targetEP == targetCEP)) {
return true;
} else {
if (!checkSourceAndTargetEditParts && doNotCheckSourceEditPart) {
// .
} else if (sourceEP instanceof org.eclipse.gef.ConnectionEditPart && isCyclicConnectionRequest(targetCEP, (org.eclipse.gef.ConnectionEditPart) sourceEP, true, doNotCheckSourceEditPart)) {
return true;
}
if (!checkSourceAndTargetEditParts && !doNotCheckSourceEditPart) {
// .
} else if (targetEP instanceof org.eclipse.gef.ConnectionEditPart && isCyclicConnectionRequest(targetCEP, (org.eclipse.gef.ConnectionEditPart) targetEP, true, doNotCheckSourceEditPart)) {
return true;
}
}
return false;
}
/**
* Retrieve the list of all source and target connections for the connection.
*
* @param set
* HashSet to add the connections to.
* @param connectionEditPart
* the connection edit part.
*/
private void getSourceAndTargetConnections(HashSet set, org.eclipse.gef.ConnectionEditPart connectionEditPart) {
if (connectionEditPart == null || set == null) {
return;
}
for (Iterator i = connectionEditPart.getSourceConnections().iterator(); i.hasNext();) {
org.eclipse.gef.ConnectionEditPart next = (org.eclipse.gef.ConnectionEditPart) i.next();
Connection sourceConnection = (Connection) next.getFigure();
set.add(sourceConnection);
getSourceAndTargetConnections(set, next);
}
for (Iterator i = connectionEditPart.getTargetConnections().iterator(); i.hasNext();) {
org.eclipse.gef.ConnectionEditPart next = (org.eclipse.gef.ConnectionEditPart) i.next();
Connection targetConnection = (Connection) next.getFigure();
set.add(targetConnection);
getSourceAndTargetConnections(set, next);
}
// For message edit part, we need to collect all connections from message ends.
if (connectionEditPart instanceof AbstractMessageEditPart) {
List children = ((AbstractMessageEditPart) connectionEditPart).getChildren();
for (Object object : children) {
if (!(object instanceof MessageEndEditPart)) {
continue;
}
for (Iterator i = ((MessageEndEditPart) object).getSourceConnections().iterator(); i.hasNext();) {
org.eclipse.gef.ConnectionEditPart next = (org.eclipse.gef.ConnectionEditPart) i.next();
Connection sourceConnection = (Connection) next.getFigure();
set.add(sourceConnection);
getSourceAndTargetConnections(set, next);
}
for (Iterator i = ((MessageEndEditPart) object).getTargetConnections().iterator(); i.hasNext();) {
org.eclipse.gef.ConnectionEditPart next = (org.eclipse.gef.ConnectionEditPart) i.next();
Connection targetConnection = (Connection) next.getFigure();
set.add(targetConnection);
getSourceAndTargetConnections(set, next);
}
}
}
}
@Override
protected void setLineWidth(int width) {
getPrimaryShape().setLineWidth(width);
}
@Override
protected void createDefaultEditPolicies() {
super.createDefaultEditPolicies();
installEditPolicy(EditPolicy.CONNECTION_ENDPOINTS_ROLE, new AnnotatedLinkEndpointEditPolicy());
}
public class AnnotatedLinkDescriptor extends PolylineConnectionEx {
public AnnotatedLinkDescriptor() {
this.setLineStyle(Graphics.LINE_DASH);
}
}
}
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