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/*******************************************************************************
* Copyright (c) 2011, 2015 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.core.internal.operations;
import static java.text.MessageFormat.format;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.protocol.IToken;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.services.IFileSystem;
import org.eclipse.tcf.services.IFileSystem.DirEntry;
import org.eclipse.tcf.services.IFileSystem.DoneRemove;
import org.eclipse.tcf.services.IFileSystem.FileSystemException;
import org.eclipse.tcf.te.tcf.filesystem.core.interfaces.IConfirmCallback;
import org.eclipse.tcf.te.tcf.filesystem.core.interfaces.runtime.IFSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.interfaces.runtime.IFSTreeNodeWorkingCopy;
import org.eclipse.tcf.te.tcf.filesystem.core.internal.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.internal.utils.CacheManager;
import org.eclipse.tcf.te.tcf.filesystem.core.nls.Messages;
/**
* FSDelete deletes the selected FSTreeNode list.
*/
public class OpDelete extends AbstractOperation {
private static class WorkItem {
final WorkItem fParent;
final FSTreeNode fNode;
boolean fContentCleared = false;
boolean fContentLeftOK = false;
WorkItem(FSTreeNode node) {
fParent = null;
fNode = node;
}
WorkItem(WorkItem item, FSTreeNode node) {
fParent = item;
fNode = node;
}
void setContentLeftOK() {
fContentLeftOK = true;
if (fParent != null)
fParent.setContentLeftOK();
}
}
LinkedList<WorkItem> fWork = new LinkedList<WorkItem>();
IConfirmCallback fConfirmCallback;
private List<FSTreeNode> fNodes;
public OpDelete(List<? extends IFSTreeNode> nodes, IConfirmCallback confirmCallback) {
fNodes = dropNestedNodes(nodes);
fConfirmCallback = confirmCallback;
}
@Override
protected IStatus doRun(IProgressMonitor monitor) {
SubMonitor sm = SubMonitor.convert(monitor, getName(), fNodes.size());
for (FSTreeNode node : fNodes) {
IStatus status = removeNode(node, sm.newChild(1));
node.getParent().notifyChange();
if (!status.isOK())
return status;
}
return Status.OK_STATUS;
}
private IStatus removeNode(FSTreeNode node, SubMonitor monitor) {
fWork.add(new WorkItem(node));
while (!fWork.isEmpty()) {
IStatus s = runWorkItem(fWork.remove(), monitor);
if (!s.isOK()) {
node.notifyChange();
return s;
}
}
return Status.OK_STATUS;
}
protected IStatus runWorkItem(final WorkItem item, IProgressMonitor monitor) {
if (item.fContentLeftOK) {
if (item.fParent == null) {
return item.fNode.operationRefresh(true).run(monitor);
}
return Status.OK_STATUS;
}
if (fConfirmCallback != null && fConfirmCallback.requires(item.fNode)) {
int makeWritable = confirmCallback(item.fNode, fConfirmCallback);
switch (makeWritable) {
case IConfirmCallback.NO:
item.setContentLeftOK();
return Status.OK_STATUS;
case IConfirmCallback.YES:
IStatus s = mkWritable(item.fNode, monitor);
if (!s.isOK())
return s;
break;
case IConfirmCallback.CANCEL:
default:
return Status.CANCEL_STATUS;
}
}
CacheManager.clearCache(item.fNode);
final TCFResult<?> result = new TCFResult<Object>();
monitor.subTask(NLS.bind(Messages.OpDelete_RemovingFileFolder, item.fNode.getLocation()));
Protocol.invokeLater(new Runnable() {
@Override
public void run() {
tcfRunWorkItem(item, result);
}
});
return result.waitDone(monitor);
}
private IStatus mkWritable(IFSTreeNode node, IProgressMonitor monitor) {
final IFSTreeNodeWorkingCopy workingCopy = node.createWorkingCopy();
if (node.isWindowsNode()) {
workingCopy.setReadOnly(false);
} else {
workingCopy.setWritable(true);
}
return workingCopy.operationCommit().run(new SubProgressMonitor(monitor, 0));
}
protected void tcfRunWorkItem(final WorkItem item, TCFResult<?> result) {
if (item.fNode.isFile()) {
tcfDeleteFile(item, result);
} else if (item.fNode.isDirectory()) {
if (item.fContentCleared) {
tcfDeleteEmptyFolder(item, result);
} else {
tcfDeleteFolder(item, result);
}
} else {
result.setDone(null);
}
}
private void tcfDeleteFolder(final WorkItem item, final TCFResult<?> result) {
final String path = item.fNode.getLocation(true);
final IFileSystem fs = item.fNode.getRuntimeModel().getFileSystem();
if (fs == null) {
result.setCancelled();
return;
}
tcfReadDir(fs, path, new IReadDirDone() {
@Override
public void error(FileSystemException error) {
result.setError(format(Messages.OpDelete_error_readDir, path), error);
}
@Override
public boolean checkCancelled() {
return result.checkCancelled();
}
@Override
public void done(List<DirEntry> entries) {
// Add current work item for final deletion
item.fContentCleared = true;
fWork.addFirst(item);
// Create work items for the children
for (DirEntry entry : entries) {
FSTreeNode node = new FSTreeNode(item.fNode, entry.filename, false, entry.attrs);
fWork.addFirst(new WorkItem(item, node));
}
result.setDone(null);
}
});
}
private void tcfDeleteFile(final WorkItem item, final TCFResult<?> result) {
final IFileSystem fs = item.fNode.getRuntimeModel().getFileSystem();
if (fs == null) {
result.setCancelled();
return;
}
fs.remove(item.fNode.getLocation(true), new DoneRemove() {
@Override
public void doneRemove(IToken token, FileSystemException error) {
tcfHandleRemoved(item, error, result);
}
});
}
private void tcfDeleteEmptyFolder(final WorkItem item, final TCFResult<?> result) {
final IFileSystem fs = item.fNode.getRuntimeModel().getFileSystem();
if (fs == null) {
result.setCancelled();
return;
}
fs.rmdir(item.fNode.getLocation(true), new DoneRemove() {
@Override
public void doneRemove(IToken token, FileSystemException error) {
tcfHandleRemoved(item, error, result);
}
});
}
protected void tcfHandleRemoved(final WorkItem item, FileSystemException error, final TCFResult<?> result) {
if (error != null) {
result.setError(format(Messages.OpDelete_error_delete, item.fNode.getLocation()), error);
} else if (!result.checkCancelled()) {
if (item.fParent == null) {
item.fNode.getParent().removeNode(item.fNode, true);
}
result.setDone(null);
}
}
@Override
public String getName() {
return Messages.OpDelete_Deleting;
}
}
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