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/*****************************************************************************
* Copyright (c) 2014, 2016 CEA LIST, Christian W. Damus, 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:
* Gabriel Pascual (ALL4TEC) gabriel.pascual@all4tec.net - Initial API and implementation
* Christian W. Damus - bug 485220
*
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.export.utils;
import java.util.Collection;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.core.resource.ModelSet;
import org.eclipse.papyrus.infra.core.resource.sasheditor.DiModel;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.ui.util.ServiceUtilsForSelection;
/**
* Helper to extract file from selection in Project Explorer.
*
* @author Gabriel Pascual
*
*/
public class SelectionHelper {
/**
* Constructor.
*
*/
private SelectionHelper() {
}
/**
* Try to retrieve the selected file from the given selection.
*
* @param selection
* the selection
* @return the selected file
*/
public static IFile convertSelection2File(ISelection selection) {
IFile foundFile = null;
// get the selected diagrams file
if (selection instanceof IStructuredSelection) {
IStructuredSelection structuredSelection = (IStructuredSelection) selection;
// Only one file should be selected
if (!structuredSelection.isEmpty() && structuredSelection.size() == 1) {
Object selectedObject = structuredSelection.getFirstElement();
foundFile = getIFile(selectedObject);
}
}
return foundFile;
}
/**
* Return the IFile corresponding to the selection.
*
* @param selectedObj
* selected file
* @return the i file
*/
public static IFile getIFile(Object selectedObj) {
IFile result = null;
if (selectedObj instanceof IFile) {
result = (IFile) selectedObj;
}
// Try to adapt
if (result == null && selectedObj instanceof IAdaptable) {
result = ((IAdaptable) selectedObj).getAdapter(IFile.class);
}
// adapt in ifile
if (result == null) {
result = Platform.getAdapterManager().getAdapter(selectedObj, IFile.class);
}
if (result == null) {
// try to check if it is a collection
Collection<?> collec = Platform.getAdapterManager().getAdapter(selectedObj, Collection.class);
if (collec != null) {
for (Object o : collec) {
if (o instanceof IFile) {
IFile f = (IFile) o;
if (DiModel.MODEL_FILE_EXTENSION.equals(f.getFileExtension())) {
result = f;
break;
}
}
}
}
}
return result != null && DiModel.MODEL_FILE_EXTENSION.equals(result.getFileExtension()) ? result
: null;
}
/**
* Checks if selection is exportable model. To export a model to images, it must contain diagrams.
*
*
* @param receiver
* the receiver
* @return true, if is exportable mosdel
*/
public static boolean isExportableModel(IStructuredSelection receiver) {
boolean result = false;
try {
ModelSet modelSet = ServiceUtilsForSelection.getInstance().getModelSet(receiver);
result = (modelSet != null) && ExportUtils.hasExportableDiagrams(modelSet);
} catch (ServiceException e) {
// Ignore; it's normal for some selections
}
return result;
}
}
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