/*******************************************************************************
* Copyright (C) 2010, 2013 Mathias Kinzler <mathias.kinzler@sap.com> 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
*******************************************************************************/
package org.eclipse.egit.ui.internal.history.command;
import java.io.File;
import java.util.Iterator;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
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.merge.GitCompareEditorInput;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* Compare the file contents of two commits.
*/
public class CompareVersionsHandler extends AbstractHistoryCommandHandler {
public Object execute(ExecutionEvent event) throws ExecutionException {
IStructuredSelection selection = getSelection(event);
if (selection.size() == 2) {
Iterator<?> it = selection.iterator();
RevCommit commit1 = (RevCommit) it.next();
RevCommit commit2 = (RevCommit) it.next();
Object input = getPage(event).getInputInternal().getSingleItem();
Repository repo = getRepository(event);
IWorkbenchPage workBenchPage = HandlerUtil
.getActiveWorkbenchWindowChecked(event).getActivePage();
if (input instanceof IFile) {
IFile resource = (IFile) input;
final RepositoryMapping map = RepositoryMapping
.getMapping(resource);
final String gitPath = map.getRepoRelativePath(resource);
final String commit1Path = getRenamedPath(gitPath, commit1);
final String commit2Path = getRenamedPath(gitPath, commit2);
CompareUtils.openInCompare(commit1, commit2, commit1Path,
commit2Path, map.getRepository(), workBenchPage);
} else if (input instanceof File) {
File fileInput = (File) input;
final String gitPath = getRepoRelativePath(repo, fileInput);
final String commit1Path = getRenamedPath(gitPath, commit1);
final String commit2Path = getRenamedPath(gitPath, commit2);
CompareUtils.openInCompare(commit1, commit2, commit1Path,
commit2Path, repo, workBenchPage);
} else if (input instanceof IResource) {
GitCompareEditorInput compareInput = new GitCompareEditorInput(
commit1.name(), commit2.name(), (IResource) input);
CompareUtils.openInCompare(workBenchPage, compareInput);
} else if (input == null) {
GitCompareEditorInput compareInput = new GitCompareEditorInput(
commit1.name(), commit2.name(), repo);
CompareUtils.openInCompare(workBenchPage, compareInput);
}
}
return null;
}
@Override
public boolean isEnabled() {
GitHistoryPage page = getPage();
if (page == null)
return false;
return getSelection(page).size() == 2;
}
}