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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.util;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.gef.EditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.LabelEditPart;
import org.eclipse.gmf.runtime.notation.LayoutConstraint;
import org.eclipse.gmf.runtime.notation.Location;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.AbstractMessageEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.GateEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.LifelineEditPart;
import org.eclipse.papyrus.uml.diagram.sequence.locator.SelfMessageLabelLocator;
/**
* @author Jin Liu (jin.liu@soyatec.com)
*/
public class SelfMessageHelper {
private static Location getLocation(LabelEditPart label) {
if (label == null) {
return null;
}
Object model = label.getModel();
if (model instanceof Node) {
LayoutConstraint layoutConstraint = ((Node) model).getLayoutConstraint();
if (layoutConstraint instanceof Location) {
return (Location) layoutConstraint;
}
}
return null;
}
/**
* This method only available for initialized location(x=1, y=-13).
*/
public static void updateLabelLocation(LabelEditPart label) {
if (label == null || !(label.getParent() instanceof AbstractMessageEditPart)) {
return;
}
AbstractMessageEditPart message = (AbstractMessageEditPart) label.getParent();
if (!isSelfLink(message)) {
return;
}
final Location location = getLocation(label);
if (location == null) {
return;
}
final Point pt = new Point(location.getX(), location.getY());
// Initialize value.
if (pt.x == 1 && pt.y == -13) {
message.setLayoutConstraint(label, label.getFigure(), new SelfMessageLabelLocator(message.getConnectionFigure(), label.getKeyPoint()));
}
}
public static boolean isSelfLink(AbstractMessageEditPart message) {
if (message == null) {
return false;
}
EditPart source = message.getSource();
EditPart target = message.getTarget();
LifelineEditPart sourceLifeline = getLifeline(source);
LifelineEditPart targetLifeline = getLifeline(target);
if (sourceLifeline != null) {
return sourceLifeline == targetLifeline;
}
// Fixed bug about displaying label for gate to gate messages.
if (source instanceof GateEditPart && target instanceof GateEditPart) {
if (source.getParent() == target.getParent() && (source.getParent() instanceof LifelineEditPart)) {
return true;
}
}
return false;
}
private static LifelineEditPart getLifeline(EditPart editPart) {
if (editPart == null) {
return null;
}
if (editPart instanceof LifelineEditPart) {
return (LifelineEditPart) editPart;
}
return getLifeline(editPart.getParent());
}
}
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