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/*******************************************************************************
* Copyright (C) 2009, Yann Simon <yann.simon.fr@gmail.com>
*
* 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.File;
import java.io.IOException;
import org.eclipse.compare.CompareUI;
import org.eclipse.compare.IContentChangeListener;
import org.eclipse.compare.IContentChangeNotifier;
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.core.resources.IResource;
import org.eclipse.egit.core.internal.storage.GitFileRevision;
import org.eclipse.egit.core.project.RepositoryMapping;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.UIText;
import org.eclipse.egit.ui.internal.EditableRevision;
import org.eclipse.egit.ui.internal.GitCompareFileRevisionEditorInput;
import org.eclipse.jgit.lib.GitIndex;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.osgi.util.NLS;
import org.eclipse.team.core.history.IFileRevision;
import org.eclipse.team.ui.synchronize.SaveableCompareEditorInput;
/**
* The "compare with index" action. This action opens a diff editor comparing
* the file as found in the working directory and the version found in the index
* of the repository.
*/
public class CompareWithIndexActionHandler extends RepositoryActionHandler {
public Object execute(ExecutionEvent event) throws ExecutionException {
final IResource resource = getSelectedResources(event)[0];
final IFile baseFile = (IFile) resource;
final ITypedElement base = SaveableCompareEditorInput
.createFileElement(baseFile);
final ITypedElement next;
try {
next = getHeadTypedElement(baseFile);
} catch (IOException e) {
Activator.handleError(
UIText.CompareWithIndexAction_errorOnAddToIndex, e, true);
return null;
}
final GitCompareFileRevisionEditorInput in = new GitCompareFileRevisionEditorInput(
base, next, null);
CompareUI.openCompareEditor(in);
return null;
}
private ITypedElement getHeadTypedElement(final IFile baseFile)
throws IOException {
final RepositoryMapping mapping = RepositoryMapping.getMapping(baseFile
.getProject());
final Repository repository = mapping.getRepository();
String gitPath = mapping.getRepoRelativePath(baseFile);
GitIndex index = repository.getIndex();
if (index.getEntry(gitPath) == null) {
// the file cannot be found in the index
return new GitCompareFileRevisionEditorInput.EmptyTypedElement(NLS
.bind(UIText.CompareWithIndexAction_FileNotInIndex,
baseFile.getName()));
}
IFileRevision nextFile = GitFileRevision.inIndex(repository, gitPath);
final EditableRevision next = new EditableRevision(nextFile);
IContentChangeListener listener = new IContentChangeListener() {
public void contentChanged(IContentChangeNotifier source) {
final byte[] newContent = next.getModifiedContent();
try {
final GitIndex index = repository.getIndex();
final File file = new File(baseFile.getLocation()
.toString());
index.add(mapping.getWorkTree(), file, newContent);
index.write();
} catch (IOException e) {
Activator.handleError(
UIText.CompareWithIndexAction_errorOnAddToIndex, e,
true);
}
}
};
next.addContentChangeListener(listener);
return next;
}
@Override
public boolean isEnabled() {
try {
final IResource[] selectedResources = getSelectedResources(null);
if (selectedResources.length != 1)
return false;
final IResource resource = selectedResources[0];
if (!(resource instanceof IFile)) {
return false;
}
final RepositoryMapping mapping = RepositoryMapping
.getMapping(resource.getProject());
return mapping != null;
} catch (ExecutionException e) {
Activator.handleError(e.getMessage(), e, false);
return false;
}
}
}
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