/*******************************************************************************
* Copyright (c) 2010, 2014 SAP AG 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:
* Mathias Kinzler (SAP AG) - initial implementation
* Dariusz Luksza (dariusz@luksza.org) - disable command when HEAD cannot be
* resolved
*******************************************************************************/
package org.eclipse.egit.ui.internal.commands.shared;
import static org.eclipse.ui.handlers.HandlerUtil.getCurrentSelectionChecked;
import java.io.IOException;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.egit.core.op.RebaseOperation;
import org.eclipse.egit.ui.internal.UIText;
import org.eclipse.egit.ui.internal.dialogs.BasicConfigurationDialog;
import org.eclipse.egit.ui.internal.dialogs.RebaseTargetSelectionDialog;
import org.eclipse.egit.ui.internal.rebase.RebaseInteractiveHandler;
import org.eclipse.egit.ui.internal.selection.SelectionUtils;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jgit.api.RebaseCommand.InteractiveHandler;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;
import org.eclipse.osgi.util.NLS;
/**
* Implements "Rebase" to the currently checked out {@link Ref}
*/
public class RebaseCurrentRefCommand extends AbstractRebaseCommandHandler {
private Ref ref;
private boolean interactive;
private boolean preserveMerges;
/** */
public RebaseCurrentRefCommand() {
super(UIText.RebaseCurrentRefCommand_RebasingCurrentJobName,
UIText.RebaseCurrentRefCommand_RebaseCanceledMessage);
}
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
// we need the ref from the event in createRebaseOperation
setRef(event);
if (ref == null)
return null;
return super.execute(event);
}
private void setRef(ExecutionEvent event) throws ExecutionException {
ISelection currentSelection = getCurrentSelectionChecked(event);
if (currentSelection instanceof IStructuredSelection) {
IStructuredSelection selection = (IStructuredSelection) currentSelection;
Object selected = selection.getFirstElement();
ref = getRef(selected);
} else
ref = null;
Object context = event.getApplicationContext();
if (!(context instanceof IEvaluationContext))
return;
final Repository repository = SelectionUtils
.getRepository((IEvaluationContext) context);
if (repository == null)
return;
BasicConfigurationDialog.show(repository);
String currentFullBranch = getFullBranch(repository);
if (ref != null && ref.getName().equals(currentFullBranch))
ref = null;
if (ref == null) {
RebaseTargetSelectionDialog rebaseTargetSelectionDialog = new RebaseTargetSelectionDialog(
getShell(event), repository);
if (rebaseTargetSelectionDialog.open() == IDialogConstants.OK_ID) {
String refName = rebaseTargetSelectionDialog.getRefName();
try {
ref = repository.getRef(refName);
} catch (IOException e) {
throw new ExecutionException(e.getMessage(), e);
}
interactive = rebaseTargetSelectionDialog.isInteractive();
preserveMerges = rebaseTargetSelectionDialog.isPreserveMerges();
} else
return;
}
jobname = NLS.bind(
UIText.RebaseCurrentRefCommand_RebasingCurrentJobName,
Repository.shortenRefName(currentFullBranch), ref.getName());
}
@Override
public void setEnabled(Object evaluationContext) {
if (evaluationContext instanceof IEvaluationContext) {
IEvaluationContext ctx = (IEvaluationContext) evaluationContext;
Repository repo = SelectionUtils.getRepository(ctx);
if (repo != null) {
boolean enabled = isEnabledForState(repo,
repo.getRepositoryState());
setBaseEnabled(enabled);
} else {
setBaseEnabled(false);
}
return;
}
setBaseEnabled(true);
}
/**
* @param repo
* @param state
* @return whether this command is enabled for the repository state
*/
public static boolean isEnabledForState(Repository repo,
RepositoryState state) {
return state == RepositoryState.SAFE && hasHead(repo);
}
private static boolean hasHead(Repository repo) {
try {
Ref headRef = repo.getRef(Constants.HEAD);
return headRef != null && headRef.getObjectId() != null;
} catch (IOException e) {
return false;
}
}
private String getFullBranch(Repository repository)
throws ExecutionException {
try {
return repository.getFullBranch();
} catch (IOException e) {
throw new ExecutionException(
UIText.RebaseCurrentRefCommand_ErrorGettingCurrentBranchMessage,
e);
}
}
@Override
protected RebaseOperation createRebaseOperation(Repository repository)
throws ExecutionException {
InteractiveHandler handler = interactive ? RebaseInteractiveHandler.INSTANCE
: null;
RebaseOperation operation = new RebaseOperation(repository, ref,
handler);
operation.setPreserveMerges(preserveMerges);
return operation;
}
}