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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
*
* 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:
* Vincent Lorenzo (CEA LIST) vincent.lorenzo@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.common.editpolicies;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.commands.Command;
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.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editparts.DiagramEditPart;
import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand;
import org.eclipse.gmf.tooling.runtime.update.UpdaterLinkDescriptor;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.window.Window;
import org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.AbstractShowHideRelatedLinkEditPolicy;
import org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.EdgeWithNoSemanticElementRepresentationImpl;
import org.eclipse.papyrus.infra.gmfdiag.common.utils.Domain2Notation;
import org.eclipse.papyrus.uml.diagram.common.helper.LinkMappingHelper;
import org.eclipse.papyrus.uml.diagram.common.ui.dialogs.ShowHideRelatedLinkSelectionDialog;
import org.eclipse.papyrus.uml.diagram.common.util.LinkEndsMapper;
import org.eclipse.papyrus.uml.tools.providers.UMLLabelProvider;
import org.eclipse.swt.widgets.Display;
import org.eclipse.uml2.uml.Comment;
import org.eclipse.uml2.uml.Connector;
import org.eclipse.uml2.uml.Constraint;
import org.eclipse.uml2.uml.DirectedRelationship;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.Relationship;
/**
*
* Abstract class used to show hide related links on UML Diagram
*
*/
public abstract class AbstractUMLShowHideRelatedLinkEditPolicy extends AbstractShowHideRelatedLinkEditPolicy {
/**
*
* Constructor.
*
* @param host
* the host for this edit policy
*/
public AbstractUMLShowHideRelatedLinkEditPolicy(final DiagramEditPart host) {
super(host);
}
/**
*
* @see org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.AbstractShowHideRelatedLinkEditPolicy#getShowHideRelatedLinkCommandWithDialog(java.util.Collection,
* java.util.Map, java.util.Set, java.util.Map, java.util.Collection)
*
* @param selectedEditParts
* @param availableLinks
* @param visibleLinks
* @param domain2NotationMap
* @param linksDescriptors
* @return
* the command which open a dialog to ask for the user to select visible links, chained with the command to show/hide the links according
* to the user selection
*/
@Override
protected Command getShowHideRelatedLinkCommandWithDialog(final Collection<EditPart> selectedEditParts, final Map<EditPart, Set<EObject>> availableLinks, final Set<EObject> visibleLinks, final Domain2Notation domain2NotationMap, final Collection<UpdaterLinkDescriptor> linksDescriptors) {
//0. build the mapping between semantic link and their representations used in the dialog
final Map<EObject, LinkEndsMapper> linkMapping = new HashMap<EObject, LinkEndsMapper>();
final Iterator<UpdaterLinkDescriptor> iter = linksDescriptors.iterator();
while(iter.hasNext()) {
final UpdaterLinkDescriptor current = iter.next();
final EObject link = current.getModelElement();
if(link instanceof Element) {
linkMapping.put(link, createLinkEndMapper((Element)link, current));
} else if(link instanceof EdgeWithNoSemanticElementRepresentationImpl) {
final EObject source = ((EdgeWithNoSemanticElementRepresentationImpl)link).getSource();
if(source instanceof Comment || source instanceof Constraint) {
linkMapping.put(link, createLinkEndMapper((Element)source, current));
}
}
}
final TransactionalEditingDomain domain = getEditingDomain();
final CompositeCommand compositeCommand = new CompositeCommand("Show/Hide Related Link Command"); //$NON-NLS-1$
final ICommand cmd = getOpenDialogCommand(domain, selectedEditParts, availableLinks, visibleLinks, linkMapping);
compositeCommand.add(cmd);
compositeCommand.add(getComputeCommandResultCommand(domain, cmd, visibleLinks, domain2NotationMap, linksDescriptors));
return new ICommandProxy(compositeCommand);
}
/**
*
* @param descriptor
* the link descriptor
* @return
* the collection of link descriptors without some invalid descriptor (we get this case when the link doesn't have source AND target, but
* only ends)
*/
protected Collection<UpdaterLinkDescriptor> removeInvalidLinkDescriptor(final Collection<UpdaterLinkDescriptor> descriptor) {
final Collection<UpdaterLinkDescriptor> firstResult = super.removeInvalidLinkDescriptor(descriptor);
final Collection<UpdaterLinkDescriptor> result = new ArrayList<UpdaterLinkDescriptor>();
final Iterator<UpdaterLinkDescriptor> iter = firstResult.iterator();
while(iter.hasNext()) {
final UpdaterLinkDescriptor current = iter.next();
final EObject modelElement = current.getModelElement();
/*
* for example, for association between Class1 and class2, we get a link descriptor between class1 and class2 BUT another one between
* class1 and class1...
*/
if(!isAnOrientedLink(modelElement)) {
EObject src = current.getSource();
EObject target = current.getDestination();
if(src == target) {
final Collection<?> sources = LinkMappingHelper.getSource((Element)modelElement);
final Collection<?> targets = LinkMappingHelper.getTarget((Element)modelElement);
if(sources.size() > 1 && sources.equals(targets)) {
int nbOccurencesInSource = 0;
final Iterator<?> iterSrc = sources.iterator();
while(nbOccurencesInSource < 2 && iterSrc.hasNext()) {
if(iterSrc.next() == src) {
nbOccurencesInSource++;
}
}
int nbOccurencesInTarget = 0;
final Iterator<?> iterTarget = targets.iterator();
while(nbOccurencesInTarget < 2 && iterTarget.hasNext()) {
if(iterTarget.next() == src) {
nbOccurencesInTarget++;
}
}
if(nbOccurencesInSource > 1 || nbOccurencesInTarget > 1) {
//do nothing;
} else {
continue;//we must exclude it!
}
} else if(!(sources.contains(src) && targets.contains(src))) {
continue;
}
}
}
result.add(current);
}
return result;
}
/**
*
* @return
* <code>true</code> if the link is oriented and <code>false</code> if not.
* If not, that is to say than {@link LinkMappingHelper} should returns the same values for sources and targets
*/
public static final boolean isAnOrientedLink(final EObject link) {
if(link instanceof DirectedRelationship) {
return true;
} else if(link instanceof Relationship) {
return false;
} else if(link instanceof Connector) {
return false;
} else if(link instanceof Comment || link instanceof Constraint) {
return true;
}
return false;
}
/**
*
* @param element
* an element
* @return
* a linkEndsMapper according to this element
*/
public static final LinkEndsMapper createLinkEndMapper(final Element element, final UpdaterLinkDescriptor descriptor) {
Collection<?> ends;
Collection<?> sources;
Collection<?> targets;
if(element instanceof Comment || element instanceof Constraint) {
ends = Collections.emptyList();
sources = Collections.singletonList(descriptor.getSource());
targets = Collections.singletonList(descriptor.getDestination());
} else if(isAnOrientedLink(element)) {
ends = Collections.emptyList();
sources = LinkMappingHelper.getSource(element);
targets = LinkMappingHelper.getTarget(element);
} else {
ends = LinkMappingHelper.getSource(element);
sources = Collections.emptyList();
targets = Collections.emptyList();
}
return new LinkEndsMapper(element, ends, sources, targets);
}
/**
*
* @param domain
* the editing domain
* @return
* the command to open the dialog to choose the link to show
*/
protected ICommand getOpenDialogCommand(final TransactionalEditingDomain domain, final Collection<EditPart> selectedEditPart, final Map<EditPart, Set<EObject>> availableLinks, final Collection<EObject> initialSelection, final Map<EObject, LinkEndsMapper> linkMapping) {
final ICommand cmd = new AbstractTransactionalCommand(domain, "Open Show/HideDialogCommand", null) {//$NON-NLS-1$
@Override
protected CommandResult doExecuteWithResult(IProgressMonitor monitor, IAdaptable info) throws ExecutionException {
final ShowHideRelatedLinkSelectionDialog dialog = new ShowHideRelatedLinkSelectionDialog(Display.getDefault().getActiveShell(), getLabelProvider(), new AbstractShowHideRelatedLinkEditPolicy.LinkContentProvider(availableLinks), availableLinks, linkMapping);
dialog.setTitle("Show/Hide Links");//$NON-NLS-1$
dialog.setMessage("Choose the links to show.");//$NON-NLS-1$
dialog.setInput(selectedEditPart);
dialog.setInitialSelection(initialSelection);
dialog.setExpandedElements(selectedEditPart.toArray());
dialog.setContainerMode(true);
int status = dialog.open();
if(status == Window.CANCEL) {
return CommandResult.newCancelledCommandResult();
}
return CommandResult.newOKCommandResult(Arrays.asList(dialog.getResult()));
}
};
return cmd;
}
/**
*
* @see org.eclipse.papyrus.infra.gmfdiag.common.editpolicies.AbstractShowHideRelatedLinkEditPolicy#getLabelProvider()
*
* @return
*/
@Override
protected ILabelProvider getLabelProvider() {
return new UMLLabelProvider();
}
}
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