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/*****************************************************************************
* Copyright (c) 2015 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.dnd.strategy;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.commands.CompoundCommand;
import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
import org.eclipse.gmf.runtime.diagram.core.services.ViewService;
import org.eclipse.gmf.runtime.diagram.ui.commands.CommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.emf.type.core.ElementTypeRegistry;
import org.eclipse.gmf.runtime.emf.type.core.IElementMatcher;
import org.eclipse.gmf.runtime.emf.type.core.IElementType;
import org.eclipse.gmf.runtime.emf.type.core.IHintedType;
import org.eclipse.gmf.runtime.emf.type.core.ISpecializationType;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.commands.wrappers.CommandProxyWithResult;
import org.eclipse.papyrus.commands.wrappers.GMFtoGEFCommandWrapper;
import org.eclipse.papyrus.infra.gmfdiag.common.expansion.ChildrenListRepresentation;
import org.eclipse.papyrus.infra.gmfdiag.common.expansion.DiagramExpansionSingleton;
import org.eclipse.papyrus.infra.gmfdiag.common.expansion.DiagramExpansionsRegistry;
import org.eclipse.papyrus.infra.gmfdiag.common.expansionmodel.AbstractRepresentation;
import org.eclipse.papyrus.infra.gmfdiag.common.expansionmodel.Representation;
import org.eclipse.papyrus.infra.gmfdiag.dnd.Activator;
import org.eclipse.papyrus.infra.viewpoints.policy.ViewPrototype;
import org.eclipse.swt.graphics.Image;
/**
* This strategy has been added in order allow dropping new element done by using expansion model
* See Requirement #org.eclipse.papyrus.infra.gmfdiag.expansion.Req_020
*
*/
public class ExpansionElementDropStrategy extends TransactionalDropStrategy {
private DiagramExpansionsRegistry diagramExpansionRegistry;
private static final String DEBUG_PREFIX = "[EXPANSION_DIAGRAM]";
private static final boolean DEBUG_EXPANSION = "true".equalsIgnoreCase(Platform.getDebugOption(
"org.eclipse.papyrus.infra.gmfdiag.common/debug/expansion"));
/**
* Constructor.
*
*/
public ExpansionElementDropStrategy() {
this.diagramExpansionRegistry = DiagramExpansionSingleton.getInstance().getDiagramExpansionRegistry();
}
public String getLabel() {
return "Expansion element drag and drop";
}
public String getID() {
return "org.eclipse.papyrus.infra.gmfdiag.dnd.expansiondropsteategy";
}
public String getDescription() {
return "This strategy is used to allow dropping of expansion of elements in extended diagrams.";
}
public Image getImage() {
return null;
}
public int getPriority() {
return 0;
}
public void setOptions(Map<String, Object> options) {
// Nothing
}
/**
* get the diagram type from a view.
* @param currentView the current view
* @return the diagram type it can be also a view point
*/
protected String getDiagramType(View currentView) {
Diagram diagram=currentView.getDiagram();
String currentDiagramType=null;
ViewPrototype viewPrototype=org.eclipse.papyrus.infra.gmfdiag.common.utils.DiagramUtils.getPrototype(diagram);
if(viewPrototype!=null){
currentDiagramType=viewPrototype.getLabel();
}
else{
currentDiagramType=diagram.getType();
}
return currentDiagramType;
}
@Override
public Command doGetCommand(Request request, final EditPart targetEditPart) {
CompositeCommand cc = new CompositeCommand(getLabel());
if(targetEditPart instanceof GraphicalEditPart){
IGraphicalEditPart graphicalEditPart= (IGraphicalEditPart)targetEditPart;
String diagramType= getDiagramType(graphicalEditPart.getNotationView());
ChildrenListRepresentation listRepresentation=diagramExpansionRegistry.mapChildreen.get(diagramType);
//to the current diagram, a expansion is added.
if(listRepresentation==null){
return null;
}
//look for all possible children for the current target.
List<String>childrenList =listRepresentation.parentChildrenRelation.get(graphicalEditPart.getNotationView().getType());
if(childrenList==null){
return null;
}
List<EObject> sourceElements = getSourceEObjects(request);
if(sourceElements.size()==0 ){
return null;
}
final List<EObject> valuesToAdd = new ArrayList<EObject>(sourceElements.size());
//getList of accepted ElementType
final ArrayList<ISpecializationType> acceptedElementTypes= new ArrayList<ISpecializationType>();
for (String posibleID : childrenList) {
AbstractRepresentation abstractRepresentation=listRepresentation.IDMap.get(posibleID);
if( abstractRepresentation instanceof Representation){
String elementTypeID=((Representation)abstractRepresentation).getGraphicalElementType();
if( elementTypeID!=null && elementTypeID!=""){
final IElementType elementType=ElementTypeRegistry.getInstance().getType(elementTypeID);
if( elementType instanceof ISpecializationType){
acceptedElementTypes.add((ISpecializationType)elementType);
}
}
}
}
if(DEBUG_EXPANSION){
Activator.log.debug(DEBUG_PREFIX+"try to drop "+ sourceElements+" inside "+graphicalEditPart.getNotationView().getType()+ " accepts "+childrenList);
}
// get the sub list of accepted source element that match to elementType
for (EObject sourceElement : sourceElements) {
Command cmd=null;
int acceptedElementTypesIndex=0;
while (cmd==null &&acceptedElementTypesIndex<acceptedElementTypes.size()){
final ISpecializationType iSpecializationType = acceptedElementTypes.get(acceptedElementTypesIndex);
IElementMatcher matcher=iSpecializationType.getMatcher();
if(matcher!=null && matcher.matches(sourceElement)){
valuesToAdd.add(sourceElement);
if(DEBUG_EXPANSION){
Activator.log.debug(DEBUG_PREFIX+"try to drop command created for "+ sourceElement+ " "+iSpecializationType);
}
cmd= new Command() {
@Override
public void execute() {
if( iSpecializationType instanceof IHintedType){
ViewService.createNode(((GraphicalEditPart) targetEditPart).getNotationView(),valuesToAdd.get(0), ((IHintedType)iSpecializationType).getSemanticHint(), ((GraphicalEditPart) targetEditPart).getDiagramPreferencesHint());
}
}
};
cc.add(new CommandProxy( cmd));
}
else{
acceptedElementTypesIndex++;
}
}
}
}
return cc.canExecute() ? new ICommandProxy(cc.reduce()) : null;
}
public String getCategoryID() {
return "org.eclipse.papyrus.infra.gmfdiag.dnd.expansiondropsteategy";
}
public String getCategoryLabel() {
return "Expansion element drag and drop";
}
}
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