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/*****************************************************************************
* Copyright (c) 2018 EclipseSource 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:
* EclipseSource - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence.edit.helpers.advice;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand;
import org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelperAdvice;
import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyDependentsRequest;
import org.eclipse.gmf.runtime.notation.LayoutConstraint;
import org.eclipse.gmf.runtime.notation.Location;
import org.eclipse.gmf.runtime.notation.Node;
import org.eclipse.gmf.runtime.notation.NotationPackage;
import org.eclipse.gmf.runtime.notation.Size;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.gmfdiag.common.adapter.NotationAndTypeAdapter;
import org.eclipse.papyrus.uml.diagram.sequence.command.SetResizeAndLocationCommand;
import org.eclipse.papyrus.uml.diagram.sequence.command.SetResizeCommand;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.InteractionOperandEditPart;
import org.eclipse.uml2.uml.InteractionOperand;
/**
* <p>
* Advice for {@link InteractionOperand} View (InteractionOperand_Shape), responsible
* for resize sibling operands during deletion.
* </p>
* <p>
* This advice must be bound before the default GMF's notationDepdendents advice,
* to make sure we can propagate the size of the deleted view before it is actually
* deleted.
* </p>
*/
public class InteractionOperandViewAdvice extends AbstractEditHelperAdvice {
@Override
protected ICommand getBeforeDestroyDependentsCommand(DestroyDependentsRequest request) {
ICommand beforeDestroyDependentsCommand = super.getBeforeDestroyDependentsCommand(request);
if (request.getElementToDestroy() instanceof InteractionOperand) {
Set<View> operandViews = findOperandViews((InteractionOperand) request.getElementToDestroy());
return CompositeCommand.compose(beforeDestroyDependentsCommand,
operandViews.stream()
.map(view -> getSizeCommandFor(view, request.getEditingDomain()))
.reduce(null, CompositeCommand::compose));
}
return beforeDestroyDependentsCommand;
}
private Set<View> findOperandViews(InteractionOperand operand) {
return EMFHelper.getUsages(operand).stream()
.filter(setting -> setting.getEStructuralFeature() == NotationPackage.Literals.VIEW__ELEMENT)
.map(Setting::getEObject)
.filter(View.class::isInstance)
.map(View.class::cast)
.filter(view -> view.getElement() == operand)
.filter(view -> InteractionOperandEditPart.VISUAL_ID.equals(view.getType()))
.collect(Collectors.toSet());
}
/**
* Return the command used to propagate the size of the given <code>viewToDestroy</code>
* to one of the sibling operands (The previous one, or the next one if the destroyed view
* if the first in the CF).
*
* The actual resize commands are created on-the-fly during command execution, so
* the commands can be properly chained in case of multi-deletion.
*
* @param viewToDestroy
* @param editingDomain
* @return
*/
private ICommand getSizeCommandFor(View viewToDestroy, TransactionalEditingDomain editingDomain) {
// Do the actual work in the command (At execution time), so we can propagate size changes
// in case of multi-selection (So when deleting A, B and C, A will resize B, then B will resize C, then C will resize D)
return new AbstractTransactionalCommand(editingDomain, "Resize sibling operand", null) {
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
Dimension deletedSize = getSize(viewToDestroy);
if (deletedSize == null) {
return null;
}
View viewBefore = findViewBefore(viewToDestroy);
int height = deletedSize.height();
if (viewBefore != null) {
Dimension sizeOfViewBefore = getSize(viewBefore);
sizeOfViewBefore.expand(0, height);
NotationAndTypeAdapter adapter = new NotationAndTypeAdapter(viewBefore.getElement(), viewBefore);
ICommand result = new SetResizeCommand(editingDomain, "Expand previous operand", adapter, sizeOfViewBefore);
result.execute(monitor, info);
} else {
View viewAfter = findViewAfter(viewToDestroy);
if (viewAfter != null) {
Rectangle boundsOfViewAfter = getBounds(viewAfter);
boundsOfViewAfter.height += height; // Do not use expand, because it would also translate the rectangle
boundsOfViewAfter.y -= height; // Shift the following operand up (Used by the Grid policy to compute coverage)
NotationAndTypeAdapter adapter = new NotationAndTypeAdapter(viewAfter.getElement(), viewAfter);
ICommand result = new SetResizeAndLocationCommand(editingDomain, "Expand previous operand", adapter, boundsOfViewAfter);
result.execute(monitor, info);
}
}
return CommandResult.newOKCommandResult();
}
};
}
/**
* @param view
* @return
* The sibling view immediately following the given view, or <code>null</code> if there is no such view
*/
private static View findViewAfter(View view) {
if (false == view.eContainer() instanceof View) {
return null;
}
@SuppressWarnings("unchecked") // GMF is Java 1.4
List<View> viewSiblings = ((View) view.eContainer()).getPersistedChildren();
int index = viewSiblings.indexOf(view);
int indexAfter = index + 1;
if (indexAfter < viewSiblings.size()) {
return viewSiblings.get(indexAfter);
}
return null;
}
/**
* @param view
* @return
* The sibling view immediately preceding the given view, or <code>null</code> if there is no such view
*/
private static View findViewBefore(View view) {
if (false == view.eContainer() instanceof View) {
return null;
}
@SuppressWarnings("unchecked") // GMF is Java 1.4
List<View> viewSiblings = ((View) view.eContainer()).getPersistedChildren();
int index = viewSiblings.indexOf(view) - 1;
if (index >= 0) {
return viewSiblings.get(index);
}
return null;
}
/**
* @param view
* @return
* A new {@link Rectangle} instance representing the model bounds of the {@link View},
* or <code>null</code> if the View doesn't have a size.
*/
private Rectangle getBounds(View view) {
if (view instanceof Node) {
Node node = (Node) view;
LayoutConstraint constraint = node.getLayoutConstraint();
Rectangle bounds = new Rectangle();
if (constraint instanceof Size) {
Size size = (Size) constraint;
bounds.setSize(size.getWidth(), size.getHeight());
}
if (constraint instanceof Location) {
Location location = (Location) constraint;
bounds.setLocation(location.getX(), location.getY());
}
return bounds;
}
return null;
}
private Dimension getSize(View viewToDestroy) {
Rectangle bounds = getBounds(viewToDestroy);
return bounds == null ? null : bounds.getSize();
}
}
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