/*******************************************************************************
* Copyright (C) 2012, Mathias Kinzler <mathias.kinzler@sap.com>
* and other copyright owners as documented in the project's IP log.
*
* 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 java.io.IOException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.egit.ui.internal.UIText;
import org.eclipse.egit.ui.internal.dialogs.CommitSelectDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.window.Window;
import org.eclipse.jgit.revwalk.RevCommit;
/**
* Replace with previous revision action handler.
*/
public class ReplaceWithPreviousActionHandler extends
DiscardChangesActionHandler {
@Override
protected String gatherRevision(ExecutionEvent event)
throws ExecutionException {
IResource[] resources = getSelectedResources(event);
if (resources.length != 1)
throw new ExecutionException(
"Unexpected number of selected Resources"); //$NON-NLS-1$
try {
List<PreviousCommit> pcs = findPreviousCommits();
List<RevCommit> previousCommits = new ArrayList<RevCommit>();
for (PreviousCommit pc: pcs)
previousCommits.add(pc.commit);
int parentCount = previousCommits.size();
if (parentCount == 0) {
MessageDialog
.openError(
getShell(event),
UIText.ReplaceWithPreviousActionHandler_NoParentCommitDialogTitle,
MessageFormat
.format(UIText.ReplaceWithPreviousActionHandler_NoParentCommitDialogMessage,
resources[0].getName()));
throw new OperationCanceledException();
} else if (parentCount > 1) {
CommitSelectDialog dlg = new CommitSelectDialog(
getShell(event), previousCommits);
if (dlg.open() == Window.OK)
return dlg.getSelectedCommit().getName();
else
throw new OperationCanceledException();
} else
return previousCommits.get(0).getName();
} catch (IOException e) {
throw new ExecutionException(e.getMessage(), e);
}
}
@Override
public boolean isEnabled() {
IResource[] selectedResources = getSelectedResources();
return super.isEnabled() && selectedResources.length == 1 &&
selectionMapsToSingleRepository();
}
}