org.eclipse.osbp.ide.core.ui/src/org/eclipse/osbp/ide/core/ui/nature/ToggleOSBPNatureAction.java

/**
 * Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0 
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *         Florian Pirchner - Initial implementation
 */
package org.eclipse.osbp.ide.core.ui.nature;

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.eclipse.osbp.ide.core.api.i18n.CoreUtil;
import org.slf4j.LoggerFactory;

/**
 * @author Sven Efftinge - Initial contribution and API
 */
public class ToggleOSBPNatureAction implements IObjectActionDelegate {

	private static final org.slf4j.Logger log = LoggerFactory
			.getLogger(ToggleOSBPNatureAction.class);

	private ISelection selection;

	public void run(IAction action) {
		if (selection instanceof IStructuredSelection) {
			for (Iterator<?> it = ((IStructuredSelection) selection).iterator(); it
					.hasNext();) {
				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);
				}
			}
		}
	}

	public void selectionChanged(IAction action, ISelection selection) {
		this.selection = selection;
	}

	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
	}

	public void toggleNature(IProject project) {
		try {
			IProjectDescription description = project.getDescription();
			String[] natures = description.getNatureIds();

			for (int i = 0; i < natures.length; ++i) {
				if (OSBPNature.NATURE_ID.equals(natures[i])) {
					// Remove the nature
					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
			String[] newNatures = new String[natures.length + 1];
			System.arraycopy(natures, 0, newNatures, 0, natures.length);
			newNatures[natures.length] = OSBPNature.NATURE_ID;
			description.setNatureIds(newNatures);
			project.setDescription(description, null);
		} catch (CoreException e) {
			log.error("{}", e);
		}
	}

	public boolean hasNature(IProject project) {
		return CoreUtil.hasNature(project);
	}

}