org.eclipse.egit.ui.internal.actions.DiscardChangesActionHandler.java Source code

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Here is the source code for org.eclipse.egit.ui.internal.actions.DiscardChangesActionHandler.java

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/*******************************************************************************
 * Copyright (C) 2010, Roland Grunberg <rgrunber@redhat.com>
 *
 * 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
 *******************************************************************************/
package org.eclipse.egit.ui.internal.actions;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.egit.core.op.DiscardChangesOperation;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.UIText;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;

/**
 * Checkout all selected dirty files.
 */
public class DiscardChangesActionHandler extends RepositoryActionHandler {

    public Object execute(ExecutionEvent event) throws ExecutionException {

        boolean performAction = MessageDialog.openConfirm(getShell(event),
                UIText.DiscardChangesAction_confirmActionTitle, UIText.DiscardChangesAction_confirmActionMessage);
        if (!performAction)
            return null;
        final DiscardChangesOperation operation = new DiscardChangesOperation(getSelectedResources(event));
        String jobname = UIText.DiscardChangesAction_discardChanges;
        Job job = new Job(jobname) {
            @Override
            protected IStatus run(IProgressMonitor monitor) {
                try {
                    operation.execute(monitor);
                } catch (CoreException e) {
                    return Activator.createErrorStatus(e.getStatus().getMessage(), e);
                }
                return Status.OK_STATUS;
            }
        };
        job.setUser(true);
        job.setRule(operation.getSchedulingRule());
        job.schedule();
        return null;
    }

    @Override
    public boolean isEnabled() {
        for (IResource res : getSelectedResources()) {
            IProject[] proj = new IProject[] { res.getProject() };
            Repository[] repositories = getRepositoriesFor(proj);
            if (repositories.length == 0)
                return false;
            Repository repository = repositories[0];
            if (!repository.getRepositoryState().equals(RepositoryState.SAFE)) {
                return false;
            }
        }
        return true;
    }

}