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/*******************************************************************************
* Copyright (c) 2010 THALES GLOBAL SERVICES.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.sequence.business.internal.elements;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gmf.runtime.notation.Bounds;
import org.eclipse.gmf.runtime.notation.Edge;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.View;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import org.eclipse.sirius.common.tools.api.util.Option;
import org.eclipse.sirius.common.tools.api.util.Options;
import org.eclipse.sirius.DDiagramElement;
import org.eclipse.sirius.diagram.sequence.description.DescriptionPackage;
import org.eclipse.sirius.diagram.sequence.util.NotationPredicate;
/**
* Represents the EndOfLife marker which can appear at the bottom of a lifeline.
* This element can be present even in the case where the lifeline is not
* explicitly destroyed by a destruction message. In that case, it is used as a
* convenience to allow the user to resize the lifeline vertically by dragging
* the EndOfLife marker.
*
* @author mporhel, pcdavid
*/
public class EndOfLife extends AbstractSequenceNode {
/**
* The visual ID. Same as a normal bordered node.
*
* @see DNode2EditPart.VISUAL_ID
*/
public static final int VISUAL_ID = 3001;
/**
* Predicate to check whether a Sirius DDiagramElement represents an
* EndOfLife.
*/
private static enum SiriusElementPredicate implements Predicate<DDiagramElement> {
INSTANCE;
public boolean apply(DDiagramElement input) {
return AbstractSequenceElement.isSequenceDiagramElement(input, DescriptionPackage.eINSTANCE.getEndOfLifeMapping());
}
}
/**
* Constructor.
*
* @param node
* the GMF Node which represents this EOL.
*/
EndOfLife(Node node) {
super(node);
Preconditions.checkArgument(EndOfLife.notationPredicate().apply(node), "The node does not represent an end-of-life.");
}
/**
* Returns a predicate to check whether a GMF View represents an EndOfLife.
*
* @return a predicate to check whether a GMF View represents an EndOfLife.
*/
public static Predicate<View> notationPredicate() {
return new NotationPredicate(NotationPackage.eINSTANCE.getNode(), VISUAL_ID, EndOfLife.viewpointElementPredicate());
}
/**
* Returns a predicate to check whether a Sirius DDiagramElement
* represents an EndOfLife.
*
* @return a predicate to check whether a Sirius DDiagramElement
* represents an EndOfLife.
*/
public static Predicate<DDiagramElement> viewpointElementPredicate() {
return SiriusElementPredicate.INSTANCE;
}
/**
* {@inheritDoc}
*/
public Option<Lifeline> getLifeline() {
return getParentLifeline();
}
/**
* Returns the destruction message which targets this EOL, if any.
*
* @return the destruction message which targets this EOL, if any.
*/
public Option<Message> getDestructionMessage() {
Node node = getNotationNode();
for (Edge edge : Iterables.filter(node.getTargetEdges(), Edge.class)) {
Option<Message> message = ISequenceElementAccessor.getMessage(edge);
if (message.some() && message.get().getKind() == Message.Kind.DESTRUCTION) {
return message;
}
}
return Options.newNone();
}
/**
* {@inheritDoc}
*/
public Rectangle getProperLogicalBounds() {
if (getNotationNode().getLayoutConstraint() instanceof Bounds) {
Bounds bounds = (Bounds) getNotationNode().getLayoutConstraint();
Rectangle llBounds = getLifeline().get().getProperLogicalBounds();
Point bottom = llBounds.getBottom();
int width = bounds.getWidth();
return new Rectangle(bottom.x - width / 2, bottom.y, bounds.getWidth(), bounds.getHeight());
} else {
throw new RuntimeException();
}
}
/**
* Tests whether this EOL marker (and thus the associated lifeline) is
* explicitly destroyed by a destruction message.
*
* @return <code>true</code> if this EOL marker is the target of a
* destruction message.
*/
public boolean isExplicitelyDestroyed() {
return getDestructionMessage().some();
}
}
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