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/*****************************************************************************
* Copyright (c) 2018 CEA LIST, EclipseSource and others.
*
* 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:
* EclipseSource - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence.edit.policies;
import org.eclipse.draw2d.IFigure;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.ReconnectRequest;
import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.SemanticEditPolicy;
import org.eclipse.gmf.runtime.emf.type.core.requests.ReorientRelationshipRequest;
import org.eclipse.gmf.runtime.notation.Anchor;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.IdentityAnchor;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.DefaultSemanticEditPolicy;
import org.eclipse.papyrus.uml.diagram.sequence.anchors.AnchorConstants;
import org.eclipse.papyrus.uml.diagram.sequence.util.GeneralOrderingUtil;
import org.eclipse.papyrus.uml.diagram.sequence.util.OccurrenceSpecificationUtil;
import org.eclipse.uml2.uml.ExecutionSpecification;
import org.eclipse.uml2.uml.Message;
import org.eclipse.uml2.uml.OccurrenceSpecification;
/**
* A {@link SemanticEditPolicy} that is able to target specific {@link OccurrenceSpecification}s
* from a request (Typically for {@link Message#getSendEvent()},{@link Message#getReceiveEvent()},
* {@link ExecutionSpecification#getStart()} and {@link ExecutionSpecification#getFinish()})
*/
public class OccurenceSemanticEditPolicy extends DefaultSemanticEditPolicy {
/**
* {@inheritDoc}
*
* <p>
* Overridden to support {@link ReconnectRequest}, when only the anchor changes, referencing
* a different {@link OccurrenceSpecification} on the same edit part.
* </p>
*
* @param request
* @return
*/
@Override
public Command getCommand(Request request) {
if (REQ_RECONNECT_SOURCE.equals(request.getType())
&& relationshipSourceHasChanged((ReconnectRequest) request)) {
EditPart connectionEP = ((ReconnectRequest) request)
.getConnectionEditPart();
if (ViewUtil.resolveSemanticElement((View) connectionEP.getModel()) == null) {
return getReorientRefRelationshipSourceCommand((ReconnectRequest) request);
} else {
return getReorientRelationshipSourceCommand((ReconnectRequest) request);
}
} else if (REQ_RECONNECT_TARGET.equals(request.getType())
&& relationshipTargetHasChanged((ReconnectRequest) request)) {
EditPart connectionEP = ((ReconnectRequest) request)
.getConnectionEditPart();
if (ViewUtil.resolveSemanticElement((View) connectionEP.getModel()) == null) {
return getReorientRefRelationshipTargetCommand((ReconnectRequest) request);
} else {
return getReorientRelationshipTargetCommand((ReconnectRequest) request);
}
}
return super.getCommand(request);
}
protected boolean relationshipSourceHasChanged(ReconnectRequest request) {
return getSourceOccurrence((Edge) request.getConnectionEditPart().getModel()) != getOccurrence(request);
}
protected boolean relationshipTargetHasChanged(ReconnectRequest request) {
return getTargetOccurrence((Edge) request.getConnectionEditPart().getModel()) != getOccurrence(request);
}
@Override
protected Command getReorientRelationshipSourceCommand(ReconnectRequest request) {
if (GeneralOrderingUtil.isGeneralOrderingLink(request)) {
EObject connectionSemElement = ViewUtil.resolveSemanticElement(((View) request.getConnectionEditPart()
.getModel()));
EObject targetSemElement = getOccurrence(request);
EObject oldSemElement = getSourceOccurrence((Edge) request.getConnectionEditPart().getModel());
TransactionalEditingDomain editingDomain = ((IGraphicalEditPart) getHost())
.getEditingDomain();
ReorientRelationshipRequest semRequest = new ReorientRelationshipRequest(
editingDomain, connectionSemElement, targetSemElement,
oldSemElement, ReorientRelationshipRequest.REORIENT_SOURCE);
semRequest.addParameters(request.getExtendedData());
return getSemanticCommand(semRequest);
}
return super.getReorientRefRelationshipSourceCommand(request);
}
@Override
protected Command getReorientRelationshipTargetCommand(ReconnectRequest request) {
if (GeneralOrderingUtil.isGeneralOrderingLink(request)) {
EObject connectionSemElement = ViewUtil.resolveSemanticElement((View) request.getConnectionEditPart().getModel());
EObject targetSemElement = getOccurrence(request);
EObject oldSemElement = getTargetOccurrence((Edge) request.getConnectionEditPart().getModel());
TransactionalEditingDomain editingDomain = ((IGraphicalEditPart) getHost())
.getEditingDomain();
ReorientRelationshipRequest semRequest = new ReorientRelationshipRequest(
editingDomain, connectionSemElement, targetSemElement,
oldSemElement, ReorientRelationshipRequest.REORIENT_TARGET);
semRequest.addParameters(request.getExtendedData());
return getSemanticCommand(semRequest);
}
return super.getReorientRelationshipTargetCommand(request);
}
private EObject getOccurrence(ReconnectRequest request) {
EObject element = EMFHelper.getEObject(request.getTarget());
IFigure targetFigure = ((IGraphicalEditPart) request.getTarget()).getFigure();
if (element instanceof Message) {
if (OccurrenceSpecificationUtil.isSource(targetFigure, request.getLocation())) {
return ((Message) element).getSendEvent();
} else {
return ((Message) element).getReceiveEvent();
}
} else if (element instanceof ExecutionSpecification) {
if (OccurrenceSpecificationUtil.isStart(targetFigure, request.getLocation())) {
return ((ExecutionSpecification) element).getStart();
} else {
return ((ExecutionSpecification) element).getFinish();
}
}
return element;
}
private EObject getTargetOccurrence(Edge connection) {
return getOccurrence(connection.getTargetAnchor(), connection.getTarget());
}
private EObject getSourceOccurrence(Edge connection) {
return getOccurrence(connection.getSourceAnchor(), connection.getSource());
}
private EObject getOccurrence(Anchor anchor, View targetElement) {
String anchorId = ((IdentityAnchor) anchor).getId();
EObject element = targetElement.getElement();
if (AnchorConstants.END_TERMINAL.equals(anchorId)) {
if (element instanceof Message) {
return ((Message) element).getReceiveEvent();
} else if (element instanceof ExecutionSpecification) {
return ((ExecutionSpecification) element).getFinish();
}
} else if (AnchorConstants.START_TERMINAL.equals(anchorId)) {
if (element instanceof Message) {
return ((Message) element).getSendEvent();
} else if (element instanceof ExecutionSpecification) {
return ((ExecutionSpecification) element).getStart();
}
}
return null;
}
}
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