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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 java.lang.reflect.Field;
import java.util.Iterator;
import org.eclipse.draw2d.Connection;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.PolylineConnection;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.UnexecutableCommand;
import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
import org.eclipse.gef.requests.CreateConnectionRequest;
import org.eclipse.gef.requests.DropRequest;
import org.eclipse.gef.requests.ReconnectRequest;
import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.GraphicalNodeEditPolicy;
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.CombinedFragmentEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.InteractionEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.InteractionOperandEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.figures.EllipseDecoration;
import org.eclipse.swt.SWT;
import org.eclipse.uml2.uml.NamedElement;
/**
* An editpolicy for handling connections end from Comment, Constraint and Observations.
*
* The semantic element of the Host should be a instance of {@link NamedElement}.
*
* @see AnnotatedLinkStartEditPolicy
*
* @author Jin Liu (jin.liu@soyatec.com)
*/
public class AnnotatedLinkEndEditPolicy extends GraphicalNodeEditPolicy {
public static final String ANNOTATED_LINK_END_ROLE = "Annotated Link End Edit Policy";
public static final String REQ_ANNOTATED_LINK_END = "annotated link end";
public static final String REQ_ANNOTATED_LINK_REORIENT_END = "annotated link reorient end";
@Override
public EditPart getTargetEditPart(Request request) {
if (REQ_ANNOTATED_LINK_END.equals(request.getType()) || REQ_ANNOTATED_LINK_REORIENT_END.equals(request.getType())) {
Point location = ((DropRequest) request).getLocation();
EditPart host = getHost();
if (isEnterAnchorArea(host, location)) {
return host;
}
}
return null;
}
private boolean isEnterAnchorArea(EditPart editPart, Point location) {
Point p = location.getCopy();
if (editPart instanceof InteractionEditPart || editPart instanceof CombinedFragmentEditPart || editPart instanceof InteractionOperandEditPart) {
IFigure figure = ((AbstractGraphicalEditPart) editPart).getFigure();
figure.translateToRelative(p);
// if mouse location is far from border, do not handle connection event
Rectangle innerRetangle = figure.getBounds().getCopy().shrink(10, 10);
if (innerRetangle.contains(p)) {
return false;
}
}
return true;
}
@Override
public Command getCommand(Request request) {
if (REQ_ANNOTATED_LINK_END.equals(request.getType())) {
return getConnectionCompleteCommand((CreateConnectionRequest) request);
} else if (REQ_ANNOTATED_LINK_REORIENT_END.equals(request.getType())) {
return getReconnectTargetCommand((ReconnectRequest) request);
}
return null;
}
@Override
protected Command getReconnectTargetCommand(ReconnectRequest request) {
ICommandProxy c = (ICommandProxy) super.getReconnectTargetCommand(request);
if (c == null) {
return null;
}
if (request.getConnectionEditPart() instanceof AnnotatedLinkEditPart) {
CompositeCommand cc = (CompositeCommand) c.getICommand();
AnnotatedLinkEditCommand ac = new AnnotatedLinkEditCommand(getEditingDomain());
ac.setAnnotatedLink((AnnotatedLinkEditPart) request.getConnectionEditPart());
ac.setTarget(getHost());
cc.add(ac);
return c;
}
return UnexecutableCommand.INSTANCE;
}
private TransactionalEditingDomain getEditingDomain() {
return ((IGraphicalEditPart) getHost()).getEditingDomain();
}
@Override
protected Command getConnectionCompleteCommand(CreateConnectionRequest request) {
ICommandProxy proxy = (ICommandProxy) super.getConnectionCompleteCommand(request);
if (proxy == null) {
return null;
}
CompositeCommand cc = (CompositeCommand) proxy.getICommand();
@SuppressWarnings("rawtypes")
Iterator it = cc.iterator();
AnnotatedLinkEditCommand command = null;
while (it.hasNext()) {
Object next = it.next();
if (next instanceof AnnotatedLinkEditCommand) {
command = (AnnotatedLinkEditCommand) next;
break;
}
}
if (command == null) {
return UnexecutableCommand.INSTANCE;
}
command.setTarget(getHost());
return proxy;
}
@Override
public void eraseTargetFeedback(Request request) {
if (REQ_ANNOTATED_LINK_END.equals(request.getType())) {
CreateConnectionRequest connReq = (CreateConnectionRequest) request;
EditPart sourceEditPart = connReq.getSourceEditPart();
EditPolicy editPolicy = sourceEditPart.getEditPolicy(AnnotatedLinkStartEditPolicy.ANNOTATED_LINK_START_ROLE);
PolylineConnection connectionFeedback = (PolylineConnection) getConnectionFeedback(editPolicy);
if (connectionFeedback != null) {
connectionFeedback.setTargetDecoration(null);
}
}
}
@Override
public void showSourceFeedback(Request request) {
// do nothing, this is not the primary GraphicalNodeEditPolicy.
}
@Override
public void eraseSourceFeedback(Request request) {
// do nothing, this is not the primary GraphicalNodeEditPolicy.
}
@Override
public void showTargetFeedback(Request request) {
if (REQ_ANNOTATED_LINK_END.equals(request.getType())) {
// Show circle feedback at target anchor
CreateConnectionRequest connReq = (CreateConnectionRequest) request;
EditPart sourceEditPart = connReq.getSourceEditPart();
EditPolicy editPolicy = sourceEditPart.getEditPolicy(AnnotatedLinkStartEditPolicy.ANNOTATED_LINK_START_ROLE);
editPolicy.showSourceFeedback(request);
PolylineConnection connectionFeedback = (PolylineConnection) getConnectionFeedback(editPolicy);
if (connectionFeedback != null) {
Command command = getHost().getCommand(request);
if (command != null && command.canExecute()) {
EllipseDecoration dec = new EllipseDecoration();
dec.setPreferredSize(10, 10);
dec.setSize(10, 10);
dec.setLineWidth(2);
dec.setAntialias(SWT.ON);
connectionFeedback.setTargetDecoration(dec);
} else {
connectionFeedback.setTargetDecoration(null);
}
}
}
}
private Connection getConnectionFeedback(EditPolicy policy) {
if (policy != null) {
try {
Field f = org.eclipse.gef.editpolicies.GraphicalNodeEditPolicy.class.getDeclaredField("connectionFeedback");
f.setAccessible(true);
return (Connection) f.get(policy);
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
}
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