/*******************************************************************************
* Copyright (C) 2010, 2016 Roland Grunberg <rgrunber@redhat.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
*
* Contributors:
* Benjamin Muskalla (Tasktop Technologies Inc.) - support for model scoping
* François Rey <eclipse.org_@_francois_._rey_._name> - handling of linked resources
* Thomas Wolf <thomas.wolf@paranor.ch> - Bug 495777
*******************************************************************************/
package org.eclipse.egit.ui.internal.actions;
import java.text.MessageFormat;
import java.util.Arrays;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.WorkspaceJob;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.egit.core.op.DiscardChangesOperation;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.JobFamilies;
import org.eclipse.egit.ui.internal.UIText;
import org.eclipse.egit.ui.internal.branch.LaunchFinder;
import org.eclipse.egit.ui.internal.operations.GitScopeUtil;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;
import org.eclipse.ui.IWorkbenchPart;
/**
* Checkout all selected dirty files.
*/
public class DiscardChangesActionHandler extends RepositoryActionHandler {
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
// capture selection from active part as long as we have context
mySelection = getSelection(event);
try {
IWorkbenchPart part = getPart(event);
String question = UIText.DiscardChangesAction_confirmActionMessage;
ILaunchConfiguration launch = LaunchFinder
.getRunningLaunchConfiguration(
Arrays.asList(getRepositories()), null);
if (launch != null) {
question = MessageFormat.format(question,
"\n\n" + MessageFormat.format( //$NON-NLS-1$
UIText.LaunchFinder_RunningLaunchMessage,
launch.getName()));
} else {
question = MessageFormat.format(question, ""); //$NON-NLS-1$
}
boolean performAction = MessageDialog.openConfirm(getShell(event),
UIText.DiscardChangesAction_confirmActionTitle, question);
if (!performAction) {
return null;
}
final DiscardChangesOperation operation = createOperation(part,
event);
if (operation == null) {
return null;
}
String jobname = UIText.DiscardChangesAction_discardChanges;
Job job = new WorkspaceJob(jobname) {
@Override
public IStatus runInWorkspace(IProgressMonitor monitor) {
try {
operation.execute(monitor);
} catch (CoreException e) {
return Activator.createErrorStatus(
e.getStatus().getMessage(), e);
}
return Status.OK_STATUS;
}
@Override
public boolean belongsTo(Object family) {
if (JobFamilies.DISCARD_CHANGES.equals(family)) {
return true;
}
return super.belongsTo(family);
}
};
job.setUser(true);
job.setRule(operation.getSchedulingRule());
job.schedule();
return null;
} finally {
// cleanup mySelection to avoid side effects later after execution
mySelection = null;
}
}
@Override
public boolean isEnabled() {
Repository[] repositories = getRepositories();
if (repositories.length == 0)
return false;
for (Repository repository : repositories) {
if (!repository.getRepositoryState().equals(RepositoryState.SAFE))
return false;
}
return true;
}
private DiscardChangesOperation createOperation(IWorkbenchPart part,
ExecutionEvent event) throws ExecutionException {
IResource[] selectedResources = gatherResourceToOperateOn(event);
String revision;
try {
revision = gatherRevision(event);
} catch (OperationCanceledException e) {
return null;
}
IResource[] resourcesInScope;
try {
resourcesInScope = GitScopeUtil.getRelatedChanges(part,
selectedResources);
} catch (InterruptedException e) {
// ignore, we will not discard the files in case the user
// cancels the scope operation
return null;
}
return new DiscardChangesOperation(resourcesInScope, revision);
}
/**
* @param event
* @return set of resources to operate on
* @throws ExecutionException
*/
protected IResource[] gatherResourceToOperateOn(ExecutionEvent event)
throws ExecutionException {
return getSelectedResources(event);
}
/**
* @param event
* @return the revision to use
* @throws ExecutionException
*/
protected String gatherRevision(ExecutionEvent event)
throws ExecutionException {
return null;
}
}