/*******************************************************************************
* Copyright (c) 2014 Maik Schreiber
*
* 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:
* Maik Schreiber - initial implementation
*******************************************************************************/
package org.eclipse.egit.ui.internal.history.command;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.egit.core.CommitUtil;
import org.eclipse.egit.ui.internal.CommonUtils;
import org.eclipse.egit.ui.internal.UIText;
import org.eclipse.egit.ui.internal.commit.RepositoryCommit;
import org.eclipse.egit.ui.internal.history.GitHistoryPage;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;
import org.eclipse.jgit.revwalk.RevCommit;
/**
* Prompts to enter a commit message for multiple commits being squashed
* together into one.
*/
public class SquashHandler extends AbstractHistoryCommandHandler {
public Object execute(ExecutionEvent event) throws ExecutionException {
Repository repository = getRepository(event);
List<RevCommit> commits = getSelectedCommits(event);
try {
if (!CommitUtil.areCommitsInCurrentBranch(commits, repository)) {
MessageDialog.openError(getPart(event).getSite().getShell(),
UIText.SquashHandler_Error_Title,
UIText.SquashHandler_CommitsNotOnCurrentBranch);
return null;
}
} catch (IOException e) {
throw new ExecutionException(
UIText.SquashHandler_ErrorCheckingIfCommitsAreOnCurrentBranch, e);
}
List<RepositoryCommit> repositoryCommits = new ArrayList<RepositoryCommit>();
for (RevCommit commit : commits)
repositoryCommits.add(new RepositoryCommit(repository, commit));
final IStructuredSelection selected = new StructuredSelection(
repositoryCommits);
CommonUtils.runCommand(
org.eclipse.egit.ui.internal.commit.command.SquashHandler.ID,
selected);
return null;
}
@Override
public boolean isEnabled() {
GitHistoryPage page = getPage();
if (page == null)
return false;
IStructuredSelection selection = getSelection(page);
if (selection.isEmpty())
return false;
Repository repository = getRepository(page);
if (repository.getRepositoryState() != RepositoryState.SAFE)
return false;
List elements = selection.toList();
int parentsNotSelected = 0;
for (Object element : elements) {
RevCommit commit = (RevCommit) element;
// disable action if a selected commit does not have exactly
// one parent (this includes the root commit)
if (commit.getParentCount() != 1)
return false;
RevCommit parentCommit = commit.getParent(0);
if (!elements.contains(parentCommit))
parentsNotSelected++;
// disable action if there is more than one selected commit
// whose parent has not been selected, this ensures a
// contiguous selection of commits
if (parentsNotSelected > 1)
return false;
}
// disable action if there is not exactly one commit whose parent
// has not been selected
if (parentsNotSelected != 1)
return false;
return true;
}
}