ToggleRpmlintNatureAction.java

/*******************************************************************************
 * Copyright (c) 2009, 2016 Red Hat, Inc.
 * 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:
 *     Red Hat - initial API and implementation
 *******************************************************************************/
package org.eclipse.linuxtools.internal.rpm.rpmlint.actions;

import java.nio.file.Files;
import java.nio.file.Paths;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
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.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.preferences.InstanceScope;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.linuxtools.internal.rpm.rpmlint.Activator;
import org.eclipse.linuxtools.internal.rpm.rpmlint.builder.RpmlintNature;
import org.eclipse.linuxtools.internal.rpm.rpmlint.preferences.PreferenceConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.preferences.ScopedPreferenceStore;

/**
 * Toggle rpmlint nature for the given project.
 * As a result this enables/disables rpmlint builder.
 *
 */
public class ToggleRpmlintNatureAction extends AbstractHandler {


    @Override
    public Object execute(ExecutionEvent event) {
        ISelection selection = HandlerUtil.getCurrentSelection(event);
        if (selection instanceof IStructuredSelection) {
            for (Object element: ((IStructuredSelection) selection).toList()) {
                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);
                }
            }
        }
        return null;
    }

    /**
     * Toggles rpmlint nature on a project.
     *
     * @param project The project on which to toggle the nature.
     */
    private static void toggleNature(IProject project) {
        String rpmlintPath = new ScopedPreferenceStore(InstanceScope.INSTANCE,Activator.PLUGIN_ID).getString(
                PreferenceConstants.P_RPMLINT_PATH);
        if(!Files.exists(Paths.get(rpmlintPath))) {
            IStatus warning = new Status(
                    IStatus.WARNING,
                    Activator.PLUGIN_ID,
                    1,
                    Messages.RunRpmlintAction_1,
                    null);
            ErrorDialog.openError(PlatformUI.getWorkbench()
                    .getActiveWorkbenchWindow().getShell(),
                    Messages.RunRpmlintAction_2,
                    null, warning);
            return;
        }
        try {
            IProjectDescription description = project.getDescription();
            String[] natures = description.getNatureIds();

            for (int i = 0; i < natures.length; ++i) {
                if (RpmlintNature.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] = RpmlintNature.NATURE_ID;
            description.setNatureIds(newNatures);
            project.setDescription(description, null);
        } catch (CoreException e) {
            //TODO log exception
        }
    }

}