/*******************************************************************************
* Copyright (C) 2010, Mathias Kinzler <mathias.kinzler@sap.com>
* Copyright (C) 2012, Gunnar Wagenknecht <gunnar@wagenknecht.org>
* Copyright (C) 2013, Laurent Goubet <laurent.goubet@obeo.fr>
*
* 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.history.command;
import java.io.File;
import org.eclipse.compare.ITypedElement;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.egit.core.project.RepositoryMapping;
import org.eclipse.egit.ui.internal.CompareUtils;
import org.eclipse.egit.ui.internal.history.GitHistoryPage;
import org.eclipse.egit.ui.internal.revision.GitCompareFileRevisionEditorInput;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.team.ui.synchronize.SaveableCompareEditorInput;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* Compare the file content of a commit with the working tree
*/
public class CompareWithWorkingTreeHandler extends
AbstractHistoryCommandHandler {
public Object execute(ExecutionEvent event) throws ExecutionException {
IStructuredSelection selection = getSelection(event);
if (selection.isEmpty())
return null;
// Even if there's more than one element, only consider the first
RevCommit commit = (RevCommit) selection.getFirstElement();
Object input = getPage(event).getInputInternal().getSingleFile();
IWorkbenchPage workBenchPage = HandlerUtil
.getActiveWorkbenchWindowChecked(event).getActivePage();
if (input instanceof IFile) {
IFile file = (IFile) input;
final RepositoryMapping mapping = RepositoryMapping.getMapping(file
.getProject());
final String gitPath = mapping.getRepoRelativePath(file);
final String commitPath = getRenamedPath(gitPath, commit);
ITypedElement right = CompareUtils.getFileRevisionTypedElement(
commitPath, commit, mapping.getRepository());
final GitCompareFileRevisionEditorInput in = new GitCompareFileRevisionEditorInput(
SaveableCompareEditorInput.createFileElement(file), right,
null);
CompareUtils.openInCompare(workBenchPage, in);
} else if (input instanceof File) {
File file = (File) input;
// TODO can we create a ITypedElement from the local file?
Repository repo = getRepository(event);
RevCommit leftCommit;
try {
leftCommit = new RevWalk(repo).parseCommit(repo
.resolve(Constants.HEAD));
} catch (Exception e) {
throw new ExecutionException(e.getMessage(), e);
}
final String leftCommitPath = getRepoRelativePath(repo, file);
final String rightCommitPath = getRenamedPath(leftCommitPath,
commit);
CompareUtils.openInCompare(leftCommit, commit, leftCommitPath,
rightCommitPath, repo, workBenchPage);
}
return null;
}
@Override
public boolean isEnabled() {
GitHistoryPage page = getPage();
if (page == null)
return false;
int size = getSelection(page).size();
if (size != 1)
return false;
return page.getInputInternal().isSingleFile();
}
}