/*******************************************************************************
* Copyright (c) 2004 Vlad Dumitrescu 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:
* Vlad Dumitrescu
*******************************************************************************/
package org.erlide.ui.actions;
import java.util.Iterator;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.erlide.core.ErlangCore;
import org.erlide.util.ErlLogger;
public class ToggleNatureAction implements IObjectActionDelegate {
private ISelection fSelection;
@Override
public void run(final IAction action) {
if (fSelection instanceof IStructuredSelection) {
for (final Iterator<?> it = ((IStructuredSelection) fSelection).iterator(); it
.hasNext();) {
final Object element = it.next();
IProject project = null;
if (element instanceof IProject) {
project = (IProject) element;
} else if (element instanceof IAdaptable) {
project = (IProject) ((IAdaptable) element)
.getAdapter(IProject.class);
}
if (project != null) {
toggleNature(project);
}
}
}
}
@Override
public void selectionChanged(final IAction action, final ISelection selection) {
fSelection = selection;
}
@Override
public void setActivePart(final IAction action, final IWorkbenchPart targetPart) {
}
/**
* Toggles Erlang nature on a project
*
* @param project
* to have sample nature added or removed
*/
private void toggleNature(final IProject project) {
try {
final IProjectDescription description = project.getDescription();
final String[] natures = description.getNatureIds();
for (int i = 0; i < natures.length; ++i) {
if (ErlangCore.NATURE_ID.equals(natures[i])) {
// Remove the nature
final String[] newNatures = new String[natures.length - 1];
System.arraycopy(natures, 0, newNatures, 0, i);
System.arraycopy(natures, i + 1, newNatures, i, natures.length - i
- 1);
description.setNatureIds(newNatures);
project.setDescription(description, null);
return;
}
}
// Add the nature, it will be put first
final String[] newNatures = new String[natures.length + 1];
System.arraycopy(natures, 0, newNatures, 1, natures.length);
newNatures[0] = ErlangCore.NATURE_ID;
description.setNatureIds(newNatures);
project.setDescription(description, null);
} catch (final CoreException e) {
ErlLogger.warn(e);
}
}
}