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/*******************************************************************************
* Copyright (c) 2011 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.dialogs;
import java.util.List;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.DecoratingLabelProvider;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.tcf.te.tcf.filesystem.activator.UIPlugin;
import org.eclipse.tcf.te.tcf.filesystem.controls.FSTreeContentProvider;
import org.eclipse.tcf.te.tcf.filesystem.controls.FSTreeViewerSorter;
import org.eclipse.tcf.te.tcf.filesystem.interfaces.IFSConstants;
import org.eclipse.tcf.te.tcf.filesystem.internal.columns.FSTreeElementLabelProvider;
import org.eclipse.tcf.te.tcf.filesystem.internal.handlers.MoveFilesHandler;
import org.eclipse.tcf.te.tcf.filesystem.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.nls.Messages;
import org.eclipse.tcf.te.ui.trees.FilterDescriptor;
import org.eclipse.tcf.te.ui.trees.ViewerStateManager;
import org.eclipse.ui.IDecoratorManager;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;
/**
* <p>
* The folder selection dialog for a remote file system. To populate the tree of the selection
* dialog with the file system, you should call <code>
* ElementTreeSelectionDialog.setInput</code> to specify the peer model of the remote target. In
* order to validate the destination folder, you should also specify the nodes to be moved. The file
* selection dialog is of single selection. You can get the selected result by calling
* <code>getFirstResult</code>. The type of selected folder is an instance of FSTreeNode.
* </p>
* <p>
* The following is a snippet of example code:
*
* <pre>
* FSFolderSelectionDialog dialog = new FSFolderSelectionDialog(shell);
* dialog.setInput(peer);
* dialog.setMovedNodes(nodes);
* if (dialog.open() == Window.OK) {
* Object obj = dialog.getFirstResult();
* Assert.isTrue(obj instanceof FSTreeNode);
* FSTreeNode folder = (FSTreeNode) obj;
* // Use folder ...
* }
* </pre>
*
* @see MoveFilesHandler
*/
public class FSFolderSelectionDialog extends ElementTreeSelectionDialog {
// The nodes that are being moved.
private List<FSTreeNode> movedNodes;
/**
* Create an FSFolderSelectionDialog using the specified shell as the parent.
*
* @param parentShell The parent shell.
*/
public FSFolderSelectionDialog(Shell parentShell) {
this(parentShell, new FSTreeElementLabelProvider(), new FSTreeContentProvider());
}
/**
* Create an FSFolderSelectionDialog using the specified shell, an FSTreeLabelProvider, and a
* content provider that provides the tree nodes.
*
* @param parentShell The parent shell.
* @param labelProvider The label provider.
* @param contentProvider The content provider.
*/
private FSFolderSelectionDialog(Shell parentShell, ILabelProvider labelProvider, ITreeContentProvider contentProvider) {
super(parentShell, createDecoratingLabelProvider(labelProvider), contentProvider);
setTitle(Messages.FSFolderSelectionDialog_MoveDialogTitle);
setMessage(Messages.FSFolderSelectionDialog_MoveDialogMessage);
this.setAllowMultiple(false);
this.setComparator(new FSTreeViewerSorter());
this.addFilter(new DirectoryFilter());
this.setStatusLineAboveButtons(false);
this.setValidator(new ISelectionStatusValidator() {
@Override
public IStatus validate(Object[] selection) {
return isValidFolder(selection);
}
});
}
/**
* The viewer filter used to filter out files.
*/
static class DirectoryFilter extends ViewerFilter {
@Override
public boolean select(Viewer viewer, Object parentElement, Object element) {
if (element instanceof FSTreeNode) {
FSTreeNode node = (FSTreeNode) element;
return node.isDirectory() || node.isPendingNode();
}
return false;
}
}
/*
* (non-Javadoc)
* @see org.eclipse.ui.dialogs.ElementTreeSelectionDialog#setInput(java.lang.Object)
*/
@Override
public void setInput(Object input) {
super.setInput(input);
FilterDescriptor[] filterDescriptors = ViewerStateManager.getInstance().getFilterDescriptors(IFSConstants.ID_TREE_VIEWER_FS, input);
if (filterDescriptors != null) {
for(FilterDescriptor descriptor : filterDescriptors) {
if(descriptor.isEnabled()) {
addFilter(descriptor.getFilter());
}
}
}
}
/**
* Create a decorating label provider using the specified label provider.
*
* @param labelProvider The label provider that actually provides labels and images.
* @return The decorating label provider.
*/
private static ILabelProvider createDecoratingLabelProvider(ILabelProvider labelProvider) {
IWorkbench workbench = PlatformUI.getWorkbench();
IDecoratorManager manager = workbench.getDecoratorManager();
ILabelDecorator decorator = manager.getLabelDecorator();
return new DecoratingLabelProvider(labelProvider,decorator);
}
/**
* Set the nodes that are about to be moved.
*
* @param movedNodes The nodes.
*/
public void setMovedNodes(List<FSTreeNode> movedNodes) {
this.movedNodes = movedNodes;
}
/**
* Create the tree viewer and set it to the label provider.
*/
@Override
protected TreeViewer doCreateTreeViewer(Composite parent, int style) {
TreeViewer viewer = super.doCreateTreeViewer(parent, style);
viewer.getTree().setLinesVisible(false);
return viewer;
}
/**
* If the specified selection is a valid folder to be selected.
*
* @param selection The selected folders.
* @return An error status if it is invalid or an OK status indicating it is valid.
*/
IStatus isValidFolder(Object[] selection) {
String pluginId = UIPlugin.getUniqueIdentifier();
IStatus error = new Status(IStatus.ERROR, pluginId, null);
if (selection == null || selection.length == 0) {
return error;
}
if (!(selection[0] instanceof FSTreeNode)) {
return error;
}
FSTreeNode target = (FSTreeNode) selection[0];
if (movedNodes != null) {
for (FSTreeNode node : movedNodes) {
if (node == target || node.isAncestorOf(target)) {
return error;
}
}
}
if(!target.isWritable()) {
return error;
}
return new Status(IStatus.OK, pluginId, null);
}
}
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