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

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

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/*******************************************************************************
 * Copyright (c) 2010 SAP AG.
 * 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:
 *    Stefan Lay (SAP AG) - initial implementation
 *******************************************************************************/

package org.eclipse.egit.ui.internal.actions;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
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.IJobChangeEvent;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.core.runtime.jobs.JobChangeAdapter;
import org.eclipse.egit.core.op.MergeOperation;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.UIText;
import org.eclipse.egit.ui.internal.dialogs.MergeTargetSelectionDialog;
import org.eclipse.egit.ui.internal.merge.MergeResultDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;

/**
 * Action for selecting a commit and merging it with the current branch.
 */
public class MergeActionHandler extends RepositoryActionHandler {

    public Object execute(final ExecutionEvent event) throws ExecutionException {
        final Repository repository = getRepository(true, event);
        if (repository == null)
            return null;

        if (!canMerge(repository, event))
            return null;

        MergeTargetSelectionDialog mergeTargetSelectionDialog = new MergeTargetSelectionDialog(getShell(event),
                repository);
        if (mergeTargetSelectionDialog.open() == IDialogConstants.OK_ID) {

            final String refName = mergeTargetSelectionDialog.getRefName();

            String jobname = NLS.bind(UIText.MergeAction_JobNameMerge, refName);
            final MergeOperation op = new MergeOperation(repository, refName);
            Job job = new Job(jobname) {
                @Override
                protected IStatus run(IProgressMonitor monitor) {
                    try {
                        op.execute(monitor);
                    } catch (final CoreException e) {
                        return e.getStatus();
                    }
                    return Status.OK_STATUS;
                }
            };
            job.setUser(true);
            job.setRule(op.getSchedulingRule());
            job.addJobChangeListener(new JobChangeAdapter() {
                @Override
                public void done(IJobChangeEvent cevent) {
                    IStatus result = cevent.getJob().getResult();
                    if (result.getSeverity() == IStatus.CANCEL) {
                        Display.getDefault().asyncExec(new Runnable() {
                            public void run() {
                                // don't use getShell(event) here since
                                // the active shell has changed since the
                                // execution has been triggered.
                                Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
                                MessageDialog.openInformation(shell, UIText.MergeAction_MergeCanceledTitle,
                                        UIText.MergeAction_MergeCanceledMessage);
                            }
                        });
                    } else if (!result.isOK()) {
                        Activator.handleError(result.getMessage(), result.getException(), true);
                    } else {
                        Display.getDefault().asyncExec(new Runnable() {
                            public void run() {
                                Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
                                new MergeResultDialog(shell, repository, op.getResult()).open();
                            }
                        });
                    }
                }
            });
            job.schedule();
        }
        return null;
    }

    @Override
    public boolean isEnabled() {
        Repository repo = getRepository();
        return repo != null && repo.getRepositoryState() == RepositoryState.SAFE;
    }
}