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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 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:
* Soyatec - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence.edit.policies;
import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Connection;
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.commands.UnexecutableCommand;
import org.eclipse.gef.requests.CreateConnectionRequest;
import org.eclipse.gef.requests.ReconnectRequest;
import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.INodeEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.GraphicalNodeEditPolicy;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.uml.diagram.sequence.command.AnnotatedLinkEditCommand;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.AnnotatedLinkEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.CustomDurationConstraintEditPart;
import org.eclipse.uml2.uml.TimeObservation;
/**
* An editpolicy for handling connections start from Comment, Constraint and Observations.
*
* @see AnnotatedLinkEndEditPolicy
*
* @author Jin Liu (jin.liu@soyatec.com)
*/
public class AnnotatedLinkStartEditPolicy extends GraphicalNodeEditPolicy {
public static final String ANNOTATED_LINK_START_ROLE = "Annotated Link Start Edit Policy";
public static final String REQ_ANNOTATED_LINK_START = "annotated link start";
public static final String REQ_ANNOTATED_LINK_REORIENT_START = "annotated link reorient start";
@Override
public EditPart getTargetEditPart(Request request) {
if (REQ_ANNOTATED_LINK_START.equals(request.getType()) || REQ_ANNOTATED_LINK_REORIENT_START.equals(request.getType())) {
return getConnectableEditPart();
}
return null;
}
/**
* Get connectable INodeEditPart safely for Constraint Label, Comment body and so on.
*/
@Override
protected INodeEditPart getConnectableEditPart() {
EditPart host = getHost();
if (host instanceof INodeEditPart) {
return (INodeEditPart) host;
} else {
IGraphicalEditPart hostGraphical = host.getAdapter(IGraphicalEditPart.class);
if (hostGraphical == null) {
return null;
}
EObject element = hostGraphical.resolveSemanticElement();
if (element == null) {
return null;
}
EditPart parent = host.getParent();
if (!(parent instanceof INodeEditPart)) {
return null;
}
IGraphicalEditPart parentGraphical = parent.getAdapter(IGraphicalEditPart.class);
if (parentGraphical != null && element == parentGraphical.resolveSemanticElement()) {
return (INodeEditPart) parent;
}
}
return null;
}
@Override
public Command getCommand(Request request) {
if (REQ_ANNOTATED_LINK_START.equals(request.getType())) {
return getConnectionCreateCommand((CreateConnectionRequest) request);
} else if (REQ_ANNOTATED_LINK_REORIENT_START.equals(request.getType())) {
return getReconnectSourceCommand((ReconnectRequest) request);
}
return null;
}
@Override
public void showSourceFeedback(Request request) {
if (AnnotatedLinkEndEditPolicy.REQ_ANNOTATED_LINK_END.equals(request.getType())) {
showCreationFeedback((CreateConnectionRequest) request);
}
}
@Override
public void eraseSourceFeedback(Request request) {
if (AnnotatedLinkEndEditPolicy.REQ_ANNOTATED_LINK_END.equals(request.getType())) {
eraseCreationFeedback((CreateConnectionRequest) request);
}
}
@Override
protected Connection createDummyConnection(Request req) {
Connection conn = super.createDummyConnection(req);
conn.setForegroundColor(ColorConstants.black);
return conn;
}
@Override
protected Command getReconnectSourceCommand(ReconnectRequest request) {
EditPart host = getHost();
// Quickly failed for TimeObservation, the event of a TimeObservation can only one.
if (host instanceof GraphicalEditPart) {
View primaryView = ((GraphicalEditPart) host).getPrimaryView();
EObject element = ViewUtil.resolveSemanticElement(primaryView);
if (element instanceof TimeObservation && ((TimeObservation) element).getEvent() != null) {
return UnexecutableCommand.INSTANCE;
}
}
ICommandProxy c = (ICommandProxy) super.getReconnectSourceCommand(request);
if (c == null) {
return null;
}
if (request.getConnectionEditPart() instanceof AnnotatedLinkEditPart) {
if (getHost() instanceof CustomDurationConstraintEditPart && !((CustomDurationConstraintEditPart) getHost()).canCreateLink(request.getLocation())) {
return UnexecutableCommand.INSTANCE; // only 2 links are allowed, one for each side
}
CompositeCommand cc = (CompositeCommand) c.getICommand();
AnnotatedLinkEditCommand ac = new AnnotatedLinkEditCommand(getEditingDomain());
ac.setAnnotatedLink((AnnotatedLinkEditPart) request.getConnectionEditPart());
ac.setSource(getHost());
cc.add(ac);
return c;
}
return UnexecutableCommand.INSTANCE;
}
@Override
protected Command getConnectionCreateCommand(CreateConnectionRequest request) {
EditPart host = getHost();
// Quickly failed for TimeObservation, the event of a TimeObservation can only one.
if (host instanceof GraphicalEditPart) {
View primaryView = ((GraphicalEditPart) host).getPrimaryView();
EObject element = ViewUtil.resolveSemanticElement(primaryView);
if (element instanceof TimeObservation && ((TimeObservation) element).getEvent() != null) {
return UnexecutableCommand.INSTANCE;
}
if (host instanceof CustomDurationConstraintEditPart) {
boolean can = ((CustomDurationConstraintEditPart) host).canCreateLink(request.getLocation());
if (!can) {
return UnexecutableCommand.INSTANCE;
}
}
}
Command command = super.getConnectionCreateCommand(request);
if (command instanceof ICommandProxy) {
CompositeCommand cc = (CompositeCommand) ((ICommandProxy) command).getICommand();
AnnotatedLinkEditCommand operation = new AnnotatedLinkEditCommand(getEditingDomain());
operation.setSource(getHost());
cc.add(operation);
}
return command;
}
private TransactionalEditingDomain getEditingDomain() {
return ((IGraphicalEditPart) getHost()).getEditingDomain();
}
}
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