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/*****************************************************************************
* Copyright (c) 2012, 2014 CEA LIST 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
* Christian W. Damus (CEA) - bug 386118
*
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.common.helper;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.Platform;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.PrecisionRectangle;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gmf.runtime.notation.Bounds;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
/**
* A Helper class related to the GMF Notation metamodel.
*
* @author Camille Letavernier
*/
public class NotationHelper {
/**
* Retrieves the GMF View associated to the source object
*
* @param source
* the source
* @return the resolved view, or null if it cannot be found
*/
public static View findView(Object source) {
if (source instanceof View) {
return (View) source;
}
if (source instanceof IAdaptable) {
IAdaptable adaptable = (IAdaptable) source;
Object adapter = adaptable.getAdapter(View.class);
if (adapter instanceof View) {
return (View) adapter;
}
}
if (source != null) {
return Platform.getAdapterManager().getAdapter(source, View.class);
}
EObject obj = EMFHelper.getEObject(source);
return (obj instanceof View) ? (View) obj : null;
}
/**
* Tests whether the given View is a reference to an external element.
* A view is an external reference if its graphical container is different from its semantic
* container (i.e. self.element.eContainer() != self.primaryView.eContainer().element)
*
* @param diagramElement
* @return
*/
public static boolean isExternalRef(View diagramElement) {
if (diagramElement == null) {
return false;
}
View primaryView = SemanticElementHelper.findTopView(diagramElement);
if (primaryView == null) {
return false;
}
EObject semanticElement = primaryView.getElement();
if (semanticElement == null) {
return false;
}
EObject parentView = primaryView.eContainer();
if (!(parentView instanceof View)) {
return false;
}
EObject parentSemanticElement = ((View) parentView).getElement();
if (parentSemanticElement == null) {
return false;
}
// Relax the constraints for elements displayed on themselves (e.g. Frame in Composite Structure Diagram)
return parentSemanticElement != semanticElement.eContainer() && parentSemanticElement != semanticElement;
}
/**
* get the absolute position form the notation
*
* @param node
* the current node
* @return
* @since 3.0
*/
public static PrecisionRectangle getAbsoluteBounds(Node node) {
if (node.getLayoutConstraint() instanceof Bounds) {
PrecisionRectangle bounds = new PrecisionRectangle(((Bounds) node.getLayoutConstraint()).getX(), ((Bounds) node.getLayoutConstraint()).getY(), ((Bounds) node.getLayoutConstraint()).getWidth(), ((Bounds) node.getLayoutConstraint()).getHeight());
EObject currentView = (EObject) node.eContainer();
while (currentView != null) {
if (currentView instanceof Node) {
Point ptCurrenview = new Point(((Bounds) ((Node) currentView).getLayoutConstraint()).getX(), ((Bounds) ((Node) currentView).getLayoutConstraint()).getY());
bounds.translate(ptCurrenview);
}
currentView = currentView.eContainer();
}
return bounds;
} else
return null;
}
}
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