/**
* Copyright 2004-2016 Riccardo Solmi. All rights reserved.
* This file is part of the Whole Platform.
*
* The Whole Platform is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Whole Platform is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
*/
package org.whole.lang.ui.dnd;
import static org.eclipse.gef.RequestConstants.REQ_ADD;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.dnd.AbstractTransferDropTargetListener;
import org.eclipse.gef.requests.ChangeBoundsRequest;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.swt.widgets.Shell;
import org.whole.lang.codebase.FilePersistenceProvider;
import org.whole.lang.codebase.IFilePersistenceProvider;
import org.whole.lang.codebase.IPersistenceKit;
import org.whole.lang.codebase.IPersistenceProvider;
import org.whole.lang.model.IEntity;
import org.whole.lang.reflect.EntityDescriptor;
import org.whole.lang.ui.dialogs.IImportAsModelDialog;
import org.whole.lang.ui.dialogs.IImportAsModelDialogFactory;
import org.whole.lang.ui.util.ClipboardUtils;
import org.whole.lang.ui.viewers.IEntityPartViewer;
/**
* @author Enrico Persiani
*/
public class FileTransferDropTargetListener extends AbstractTransferDropTargetListener {
protected IImportAsModelDialogFactory factory;
public FileTransferDropTargetListener(IEntityPartViewer viewer, IImportAsModelDialogFactory factory) {
super(viewer, FileTransfer.getInstance());
this.factory = factory;
}
@Override
protected void handleDragOver() {
getCurrentEvent().feedback = DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND;
super.handleDragOver();
}
@Override
protected Request createTargetRequest() {
return new ChangeBoundsRequest(REQ_ADD);
}
@Override
protected void updateTargetRequest() {
ChangeBoundsRequest request = (ChangeBoundsRequest) getTargetRequest();
request.setEditParts(Collections.EMPTY_LIST);
request.setLocation(getDropLocation());
}
@Override
protected void handleDrop() {
super.handleDrop();
if (getCurrentEvent().detail != DND.DROP_NONE) {
getViewer().setSelection(StructuredSelection.EMPTY);
getViewer().getControl().setFocus();
}
}
@Override
protected Command getCommand() {
String[] filePaths = (String[]) getCurrentEvent().data;
List<EditPart> editParts = new ArrayList<EditPart>();
Shell shell = getViewer().getControl().getShell();
IImportAsModelDialog dialog = factory.createElementListImportAsModelDialog(shell, "DnD Import", false);
String[] fileNames = new String[filePaths.length];
for (int i=0; i<fileNames.length; i++)
fileNames[i] = filePaths[i].substring(filePaths[i].lastIndexOf(File.separatorChar)+1);
dialog.setSelection(fileNames);
if (!dialog.show())
return null;
IPersistenceKit persistenceKit = dialog.getPersistenceKit();
EntityDescriptor<?> stage = dialog.getStage();
boolean needsCompositeTarget = filePaths.length > 1;
for (String filePath : filePaths) {
try {
IWorkspace workspace = ResourcesPlugin.getWorkspace();
File file = new File(filePath);
IFile[] files = workspace.getRoot().findFilesForLocationURI(file.toURI());
IPersistenceProvider persistenceProvider = (files.length == 1) ?
new IFilePersistenceProvider(files[0]) : new FilePersistenceProvider(file);
IEntity entity = persistenceKit.readModel(persistenceProvider);
entity = ClipboardUtils.conditionalStageAdd(getTargetEditPart(), stage, entity, needsCompositeTarget);
editParts.add(ClipboardUtils.createEditPart(getViewer().getEditPartFactory(), entity));
} catch (Exception e) {
// fail silently
}
}
if (!editParts.isEmpty()) {
ChangeBoundsRequest request = (ChangeBoundsRequest) getTargetRequest();
request.setEditParts(editParts);
} else
return null;
return super.getCommand();
}
@Override
public boolean isEnabled(DropTargetEvent event) {
for (TransferData dataType : event.dataTypes)
if (EditPartsTransfer.instance().isSupportedType(dataType))
return false;
return super.isEnabled(event);
}
}