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/*****************************************************************************
* Copyright (c) 2011 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:
*
* CEALIST - Initial API and implementation (Adapted code from DeferredLayoutCommand)
*
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.common.commands;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.PrecisionRectangle;
import org.eclipse.emf.transaction.RunnableWithResult;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.workspace.util.WorkspaceSynchronizer;
import org.eclipse.gef.SnapToHelper;
import org.eclipse.gef.commands.CompoundCommand;
import org.eclipse.gef.requests.ChangeBoundsRequest;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.diagram.ui.editparts.BorderedBorderItemEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.diagram.ui.util.EditPartUtil;
import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.gmfdiag.common.snap.BorderNodeSnapHelper;
import org.eclipse.papyrus.infra.gmfdiag.common.snap.NodeSnapHelper;
/**
* This command is used to snap editparts on the grid, when only the view
* adapters are available at the time of creating the command. It is necessary
* to have the editparts when creating a snap command so this command defers
* the creation of the layout command until execution time at which point it can
* get the editparts from the editpart registry using the view adapters.
*
* @author vlorenzo
*/
//TODO : creation from the palette should use me
//TODO : move action could use me???
public class DeferredSnapToGridCommand extends AbstractTransactionalCommand {
/** the IAdaptables from which an View can be retrieved */
protected List<?> viewAdapters;
/** the diagram editpart used to get the editpart registry */
protected IGraphicalEditPart containerEP;
/**
* Constructor for <code>DefferedSnapToGridCommand</code>.
*
* @param editingDomain
* the editing domain through which model changes are made
* @param viewAdapters
* the IAdaptables from which an IView can be retrieved
* @param containerEP
* the container editpart used to get the editpart registry
*/
public DeferredSnapToGridCommand(TransactionalEditingDomain editingDomain, List<?> viewAdapters, IGraphicalEditPart containerEP) {
super(editingDomain, "Deferred Snap to grid command", null); //$NON-NLS-1$
this.viewAdapters = viewAdapters;
this.containerEP = containerEP;
}
/**
*
* @see org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand#getAffectedFiles()
*
* @return
*/
@SuppressWarnings("rawtypes")
public List getAffectedFiles() {
if(containerEP != null) {
View view = (View)containerEP.getModel();
if(view != null) {
IFile f = WorkspaceSynchronizer.getFile(view.eResource());
return f != null ? Collections.singletonList(f) : Collections.EMPTY_LIST;
}
}
return super.getAffectedFiles();
}
/**
* Executes a layout command with all the editparts for the view adapters.
*
*/
protected CommandResult doExecuteWithResult(IProgressMonitor progressMonitor, IAdaptable info) throws ExecutionException {
final RunnableWithResult<List<IGraphicalEditPart>> refreshRunnable = new RunnableWithResult<List<IGraphicalEditPart>>() {
private IStatus status;
private List<IGraphicalEditPart> result;
public List<IGraphicalEditPart> getResult() {
return result;
}
public void setStatus(IStatus status) {
this.status = status;
}
public IStatus getStatus() {
return status;
}
public void run() {
containerEP.refresh();
// The layout command requires that the figure world is updated.
getContainerFigure().invalidate();
getContainerFigure().validate();
List<IGraphicalEditPart> editParts = new ArrayList<IGraphicalEditPart>(viewAdapters.size());
Map<?, ?> epRegistry = containerEP.getRoot().getViewer().getEditPartRegistry();
for(Iterator<?> iter = viewAdapters.iterator(); iter.hasNext();) {
IAdaptable ad = (IAdaptable)iter.next();
View view = (View)ad.getAdapter(View.class);
Object ep = epRegistry.get(view);
if(ep instanceof IGraphicalEditPart) {
editParts.add((IGraphicalEditPart)ep);
}
}
if(editParts.isEmpty()) {
result = editParts;
return;
}
//probably useless
// Set<IGraphicalEditPart> layoutSet = new HashSet<IGraphicalEditPart>(editParts.size());
// layoutSet.addAll(editParts);
//
// // refresh source and target connections of any shapes in the container not being considered for layout
// Iterator<?> iter = containerEP.getChildren().iterator();
// while(iter.hasNext()) {
// Object obj = iter.next();
// if(!layoutSet.contains(obj) && obj instanceof IGraphicalEditPart) {
// IGraphicalEditPart ep = (IGraphicalEditPart)obj;
// ep.refresh();
// }
// }
result = editParts;
}
};
EditPartUtil.synchronizeRunnableToMainThread(containerEP, refreshRunnable);
List<IGraphicalEditPart> editParts = refreshRunnable.getResult();
if(editParts == null || editParts.isEmpty()) {
return CommandResult.newOKCommandResult();
}
// add an arrange command, to layout the related shapes
CompoundCommand cc = new CompoundCommand("Snap Command"); //$NON-NLS-1$
for(final IGraphicalEditPart current : editParts) {
final SnapToHelper snapHelper = (SnapToHelper)((IAdaptable)current).getAdapter(SnapToHelper.class);
final NodeSnapHelper nodeSnapHelper;
final PrecisionRectangle boundsFigure = new PrecisionRectangle(((GraphicalEditPart)current).getFigure().getBounds());
current.getFigure().translateToAbsolute(boundsFigure);
final PrecisionRectangle result = new PrecisionRectangle(boundsFigure);
if(current instanceof BorderedBorderItemEditPart) {
nodeSnapHelper = new BorderNodeSnapHelper(snapHelper, boundsFigure);
} else {
nodeSnapHelper = new NodeSnapHelper(snapHelper, boundsFigure);
}
ChangeBoundsRequest request = new ChangeBoundsRequest("move"); //$NON-NLS-1$
request.setEditParts(Collections.singletonList(current));
request.setSnapToEnabled(true);
request.setLocation(boundsFigure.getLocation());
nodeSnapHelper.snapPoint(request);
request.setLocation(result.getLocation());
cc.add(((GraphicalEditPart)current).getCommand(request));
}
if(!cc.isEmpty() && cc.canExecute()) {
cc.execute();
}
return CommandResult.newOKCommandResult();
}
/**
*
* @see org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand#cleanup()
*
*/
protected void cleanup() {
containerEP = null;//for garbage collection
viewAdapters = null;
super.cleanup();
}
/**
* gets the container edit part's figure
*
* @return the container figure
*/
protected IFigure getContainerFigure() {
return containerEP.getFigure();
}
/**
* gets the container edit part
*
* @return the container edit part
*/
protected IGraphicalEditPart getContainerEP() {
return containerEP;
}
/**
* gets a list of <code>IAdaptable</code> that can adapt to <code>
* View</code>
*
* @return view adapters
*/
protected List<?> getViewAdapters() {
return viewAdapters;
}
/**
*
* @see org.eclipse.core.commands.operations.AbstractOperation#canExecute()
*
* @return
*/
@Override
public boolean canExecute() {
return super.canExecute() && containerEP != null;
}
}
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