cdo/bundles/org.eclipse.papyrus.cdo.ui/src/org/eclipse/papyrus/cdo/internal/ui/dialogs/CheckoutBrowseDialog.java - papyrus/org.eclipse.papyrus-collaborativemodeling - Git at Google

 /*****************************************************************************
  * Copyright (c) 2013, 2017 CEA LIST.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *   CEA LIST - Initial API and implementation
  *****************************************************************************/
 package org.eclipse.papyrus.cdo.internal.ui.dialogs;

 import org.eclipse.emf.cdo.eresource.CDOResourceFolder;
 import org.eclipse.emf.cdo.eresource.CDOResourceNode;
 import org.eclipse.emf.cdo.eresource.EresourcePackage;
 import org.eclipse.emf.cdo.explorer.CDOExplorerUtil;
 import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout;
 import org.eclipse.emf.cdo.util.CDOURIUtil;
 import org.eclipse.emf.cdo.view.CDOView;
 import org.eclipse.emf.cdo.view.CDOViewInvalidationEvent;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.EClass;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.IMessageProvider;
 import org.eclipse.jface.dialogs.TitleAreaDialog;
 import org.eclipse.jface.viewers.DecoratingLabelProvider;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.jface.window.Window;
 import org.eclipse.net4j.util.event.IEvent;
 import org.eclipse.net4j.util.event.IListener;
 import org.eclipse.net4j.util.ui.views.IElementFilter;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.papyrus.cdo.internal.core.CDOUtils;
 import org.eclipse.papyrus.cdo.internal.ui.l10n.Messages;
 import org.eclipse.papyrus.cdo.internal.ui.util.UIUtil;
 import org.eclipse.papyrus.cdo.internal.ui.views.CheckoutItemProvider;
 import org.eclipse.papyrus.cdo.internal.ui.widgets.ActionButton;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.layout.RowLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.actions.CreateFolderAction;

 import com.google.common.base.Strings;


 /**
  * This is the CheckoutBrowseDialog type. Enjoy.
  */
 public class CheckoutBrowseDialog extends TitleAreaDialog {

 	private final String windowTitle;

 	private final String title;

 	private final String message;

 	private final int style;

 	private final CDOCheckout checkout;

 	private boolean allowOverwrite = false;

 	private EClass nodeTypeFilter = EresourcePackage.Literals.CDO_RESOURCE_NODE;

 	private TreeViewer tree;

 	private Text nameText;

 	private URI initialURI;

 	private CDOResourceNode selection;

 	private String name;

 	private IListener viewerRefresh;

 	/**
 	 * @param style
 	 *            one of {@link SWT#OPEN} or {@link SWT#SAVE}
 	 */
 	public CheckoutBrowseDialog(Shell parentShell, String title, String message, CDOView view, int style) {
 		this(parentShell, Messages.CheckoutBrowseDialog_windowTitle, title, message, view, style);
 	}

 	/**
 	 * @param style
 	 *            one of {@link SWT#OPEN} or {@link SWT#SAVE}
 	 */
 	public CheckoutBrowseDialog(Shell parentShell, String windowTitle, String title, String message, CDOView view, int style) {
 		super(parentShell);

 		this.windowTitle = windowTitle;
 		this.title = title;
 		this.message = message;
 		this.style = checkStyle(style);

 		this.checkout = (view == null) ? null : CDOExplorerUtil.getCheckout(view);

 		setHelpAvailable(false);
 	}

 	int checkStyle(int style) {
 		setShellStyle(getShellStyle() | (style & ~(SWT.OPEN | SWT.SAVE)));

 		return style & (SWT.OPEN | SWT.SAVE);
 	}

 	@Override
 	protected void configureShell(Shell newShell) {
 		super.configureShell(newShell);

 		newShell.setText(windowTitle);

 		newShell.addDisposeListener(new DisposeListener() {

 			@Override
 			public void widgetDisposed(DisposeEvent e) {
 				shellDisposed();
 			}
 		});
 	}

 	private void shellDisposed() {
 		if (viewerRefresh != null) {
 			for (CDOCheckout next : CDOExplorerUtil.getCheckoutManager().getCheckouts()) {
 				if (next.isOpen()) {
 					next.getView().removeListener(viewerRefresh);
 				}
 			}
 		}
 	}

 	public boolean isAllowOverwrite() {
 		return allowOverwrite;
 	}

 	public void setAllowOverwrite(boolean allowOverwrite) {
 		this.allowOverwrite = allowOverwrite;
 	}

 	public EClass getNodeTypeFilter() {
 		return nodeTypeFilter;
 	}

 	public void setNodeTypeFilter(EClass nodeTypeFilter) {
 		boolean defaulted = (nodeTypeFilter == null) || !EresourcePackage.Literals.CDO_RESOURCE_NODE.isSuperTypeOf(nodeTypeFilter);
 		this.nodeTypeFilter = defaulted ? EresourcePackage.Literals.CDO_RESOURCE_NODE : nodeTypeFilter;
 	}

 	public URI getInitialURI() {
 		return initialURI;
 	}

 	public void setInitialURI(URI initialURI) {
 		this.initialURI = initialURI;
 	}

 	public URI getSelectedURI() {
 		return (getReturnCode() != Window.OK) ? null : basicGetSelectedURI();
 	}

 	private URI basicGetSelectedURI() {
 		URI result = null;

 		if (selection != null) {
 			result = selection.getURI();
 			if (name != null) {
 				String resourceName = Strings.emptyToNull(name);
 				if (resourceName != null) {
 					if (!(selection instanceof CDOResourceFolder)) {
 						// append the name to the parent folder
 						result = result.trimSegments(1);
 					}
 					result = result.appendSegment(resourceName);
 				}
 			}
 		}

 		return result;
 	}

 	boolean isOpenStyle() {
 		return (style & SWT.OPEN) != 0;
 	}

 	boolean isSaveStyle() {
 		return (style & SWT.SAVE) != 0;
 	}

 	CDOCheckout getCheckout() {
 		return checkout;
 	}

 	@Override
 	protected Control createDialogArea(Composite parent) {
 		setTitle(title);
 		setMessage(message);

 		Composite main = (Composite) super.createDialogArea(parent);
 		Composite result = new Composite(main, SWT.NONE);
 		result.setLayout(new GridLayout(isSaveStyle() ? 3 : 1, false));
 		result.setLayoutData(new GridData(GridData.FILL_BOTH));

 		tree = new TreeViewer(result, SWT.SINGLE | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
 		tree.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, isSaveStyle() ? 2 : 1, 1));

 		CheckoutItemProvider itemProvider = (getCheckout() == null) ? new CheckoutItemProvider(null, showConnectedRepositories()) : new CheckoutItemProvider(null, getCheckout());
 		tree.setContentProvider(itemProvider);
 		tree.setLabelProvider(new DecoratingLabelProvider(itemProvider, PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));
 		tree.setSorter(itemProvider);
 		tree.setInput(CDOExplorerUtil.getCheckoutManager());
 		for (CDOCheckout next : CDOExplorerUtil.getCheckoutManager().getCheckouts()) {
 			if (next.isOpen()) {
 				next.getView().addListener(getViewerRefresh());
 			}
 		}

 		if (isSaveStyle()) {
 			// don't need to create new folders when opening an existing resource
 			Composite actionButtons = new Composite(result, SWT.NONE);
 			actionButtons.setLayoutData(new GridData(SWT.RIGHT, SWT.TOP, false, false));
 			actionButtons.setLayout(new RowLayout(SWT.VERTICAL));

 			ActionButton newFolderButton = new ActionButton(Messages.CheckoutBrowseDialog_newFolderAction, new CreateFolderAction(this), SWT.PUSH);
 			newFolderButton.attach(tree);
 			newFolderButton.createControl(actionButtons);

 			// don't need to type in names of non-existent resources when opening an existing resource
 			Label label = new Label(result, SWT.NONE);
 			label.setText(Messages.CheckoutBrowseDialog_nameLabel);
 			GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
 			gd.verticalIndent = convertVerticalDLUsToPixels(8);
 			label.setLayoutData(gd);

 			nameText = new Text(result, SWT.BORDER);
 			gd = new GridData(SWT.FILL, SWT.TOP, true, false, 2, 1);
 			gd.verticalIndent = convertVerticalDLUsToPixels(8);
 			nameText.setLayoutData(gd);
 		}

 		if (getInitialURI() != null) {
 			initializeSelection();
 		} else if (getCheckout() != null) {
 			selection = getCheckout().getView().getRootResource();
 		}

 		tree.addSelectionChangedListener(new ISelectionChangedListener() {

 			@Override
 			public void selectionChanged(SelectionChangedEvent event) {
 				IStructuredSelection sel = (IStructuredSelection) event.getSelection();
 				if (sel.isEmpty()) {
 					if (getCheckout() != null) {
 						selection = getCheckout().getView().getRootResource();
 					} else {
 						selection = null;
 					}
 				} else {
 					selection = CDOUtils.adapt(sel.getFirstElement(), CDOResourceNode.class);
 				}

 				validateSelection();
 			}
 		});

 		if (nameText != null) {
 			nameText.addModifyListener(new ModifyListener() {

 				@Override
 				public void modifyText(ModifyEvent e) {
 					name = Strings.emptyToNull(nameText.getText().trim());
 					validateSelection();
 				}
 			});
 		}

 		return result;
 	}

 	private IElementFilter showConnectedRepositories() {
 		return new IElementFilter() {

 			@Override
 			public boolean filter(Object element) {
 				boolean result = false;

 				if (element instanceof CDOCheckout) {
 					result = ((CDOCheckout) element).isOpen();
 				}

 				return result;
 			}
 		};
 	}

 	private void initializeSelection() {
 		URI uri = getInitialURI();
 		CDOView view = getCheckout().getView();

 		String path = CDOURIUtil.extractResourcePath(uri);
 		if (view.hasResource(path)) {
 			selection = view.getResourceNode(path);
 			tree.setSelection(new StructuredSelection(selection));
 			tree.expandToLevel(selection, 1);
 			if (nameText != null) {
 				name = selection.getName();
 				nameText.setText(name);
 			}
 		} else if (uri.segmentCount() > 0) {
 			// try the containing folder, then
 			URI parent = uri.trimSegments(1);
 			path = CDOURIUtil.extractResourcePath(parent);
 			if (view.hasResource(path)) {
 				// if the root resource, it is represented by the checkout
 				selection = view.getResourceNode(path);
 				Object treeSelection = selection.isRoot() ? getCheckout() : selection;
 				tree.setSelection(new StructuredSelection(treeSelection), true);
 				tree.expandToLevel(treeSelection, 1);
 				if (nameText != null) {
 					name = uri.lastSegment();
 					nameText.setText(name);
 				}
 			}
 		} else {
 			// select the checkout (representing the root resource)
 			selection = view.getRootResource();
 			Object treeSelection = getCheckout();
 			tree.setSelection(new StructuredSelection(treeSelection), true);
 			tree.expandToLevel(treeSelection, 1);
 		}
 	}

 	private void validateSelection() {
 		String error = null;
 		String warning = null;
 		String info = null;
 		boolean disable = false;

 		if (name != null) {
 			if (!URI.validSegment(name)) {
 				error = Messages.CheckoutBrowseDialog_invalidURISeg;
 			}
 		}

 		if (error == null) {
 			if (selection == null) {
 				disable = true;
 			} else {
 				String path = CDOURIUtil.extractResourcePath(basicGetSelectedURI());
 				CDOView view = selection.cdoView();

 				if (isOpenStyle() && !view.hasResource(path)) {
 					error = Messages.CheckoutBrowseDialog_noSuchResource;
 				} else if (isOpenStyle()) {
 					// then the resource exists. Is it the kind we want?
 					CDOResourceNode node = view.getResourceNode(path);
 					if (!getNodeTypeFilter().isInstance(node)) {
 						disable = true;
 						info = NLS.bind(Messages.CheckoutBrowseDialog_wrongSelection, getNodeType(getNodeTypeFilter()));
 					}
 				} else if (isSaveStyle() && view.hasResource(path)) {
 					if (isAllowOverwrite()) {
 						warning = Messages.CheckoutBrowseDialog_existsWarning;
 					} else {
 						error = Messages.CheckoutBrowseDialog_existsError;
 					}
 				}
 			}
 		}

 		getButton(IDialogConstants.OK_ID).setEnabled(!disable && (error == null));
 		if (error != null) {
 			setMessage(error, IMessageProvider.ERROR);
 		} else if (warning != null) {
 			setMessage(warning, IMessageProvider.WARNING);
 		} else if (info != null) {
 			setMessage(info, IMessageProvider.INFORMATION);
 		} else {
 			setMessage(message);
 		}
 	}

 	private String getNodeType(EClass nodeClass) {
 		String result = Messages.CheckoutBrowseDialog_anyNode;

 		if (nodeClass.getEPackage() == EresourcePackage.eINSTANCE) {
 			switch (nodeClass.getClassifierID()) {
 			case EresourcePackage.CDO_RESOURCE:
 				result = Messages.CheckoutBrowseDialog_modelKind;
 				break;
 			case EresourcePackage.CDO_RESOURCE_FOLDER:
 				result = Messages.CheckoutBrowseDialog_folderKind;
 				break;
 			case EresourcePackage.CDO_TEXT_RESOURCE:
 				result = Messages.CheckoutBrowseDialog_textKind;
 				break;
 			case EresourcePackage.CDO_BINARY_RESOURCE:
 				result = Messages.CheckoutBrowseDialog_binKind;
 				break;
 			case EresourcePackage.CDO_FILE_RESOURCE:
 				result = Messages.CheckoutBrowseDialog_fileKind;
 				break;
 			case EresourcePackage.CDO_RESOURCE_LEAF:
 				result = Messages.CheckoutBrowseDialog_leafKind;
 				break;
 			}
 		}

 		return result;
 	}

 	private IListener getViewerRefresh() {
 		if (viewerRefresh == null) {
 			viewerRefresh = new IListener() {

 				@Override
 				public void notifyEvent(IEvent event) {
 					if (event instanceof CDOViewInvalidationEvent) {
 						if ((getContents() != null) && !getContents().isDisposed()) {
 							if (UIUtil.ensureUIThread(this, event)) {
 								tree.refresh();
 							}
 						}
 					}
 				}
 			};
 		}

 		return viewerRefresh;
 	}
 }
	/*****************************************************************************
	* Copyright (c) 2013, 2017 CEA LIST.
	*
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* CEA LIST - Initial API and implementation
	*****************************************************************************/
	package org.eclipse.papyrus.cdo.internal.ui.dialogs;

	import org.eclipse.emf.cdo.eresource.CDOResourceFolder;
	import org.eclipse.emf.cdo.eresource.CDOResourceNode;
	import org.eclipse.emf.cdo.eresource.EresourcePackage;
	import org.eclipse.emf.cdo.explorer.CDOExplorerUtil;
	import org.eclipse.emf.cdo.explorer.checkouts.CDOCheckout;
	import org.eclipse.emf.cdo.util.CDOURIUtil;
	import org.eclipse.emf.cdo.view.CDOView;
	import org.eclipse.emf.cdo.view.CDOViewInvalidationEvent;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.EClass;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.dialogs.IMessageProvider;
	import org.eclipse.jface.dialogs.TitleAreaDialog;
	import org.eclipse.jface.viewers.DecoratingLabelProvider;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TreeViewer;
	import org.eclipse.jface.window.Window;
	import org.eclipse.net4j.util.event.IEvent;
	import org.eclipse.net4j.util.event.IListener;
	import org.eclipse.net4j.util.ui.views.IElementFilter;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.papyrus.cdo.internal.core.CDOUtils;
	import org.eclipse.papyrus.cdo.internal.ui.l10n.Messages;
	import org.eclipse.papyrus.cdo.internal.ui.util.UIUtil;
	import org.eclipse.papyrus.cdo.internal.ui.views.CheckoutItemProvider;
	import org.eclipse.papyrus.cdo.internal.ui.widgets.ActionButton;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.DisposeEvent;
	import org.eclipse.swt.events.DisposeListener;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.layout.RowLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.actions.CreateFolderAction;

	import com.google.common.base.Strings;


	/**
	* This is the CheckoutBrowseDialog type. Enjoy.
	*/
	public class CheckoutBrowseDialog extends TitleAreaDialog {

	private final String windowTitle;

	private final String title;

	private final String message;

	private final int style;

	private final CDOCheckout checkout;

	private boolean allowOverwrite = false;

	private EClass nodeTypeFilter = EresourcePackage.Literals.CDO_RESOURCE_NODE;

	private TreeViewer tree;

	private Text nameText;

	private URI initialURI;

	private CDOResourceNode selection;

	private String name;

	private IListener viewerRefresh;

	/**
	* @param style
	* one of {@link SWT#OPEN} or {@link SWT#SAVE}
	*/
	public CheckoutBrowseDialog(Shell parentShell, String title, String message, CDOView view, int style) {
	this(parentShell, Messages.CheckoutBrowseDialog_windowTitle, title, message, view, style);
	}

	/**
	* @param style
	* one of {@link SWT#OPEN} or {@link SWT#SAVE}
	*/
	public CheckoutBrowseDialog(Shell parentShell, String windowTitle, String title, String message, CDOView view, int style) {
	super(parentShell);

	this.windowTitle = windowTitle;
	this.title = title;
	this.message = message;
	this.style = checkStyle(style);

	this.checkout = (view == null) ? null : CDOExplorerUtil.getCheckout(view);

	setHelpAvailable(false);
	}

	int checkStyle(int style) {
	setShellStyle(getShellStyle() \| (style & ~(SWT.OPEN \| SWT.SAVE)));

	return style & (SWT.OPEN \| SWT.SAVE);
	}

	@Override
	protected void configureShell(Shell newShell) {
	super.configureShell(newShell);

	newShell.setText(windowTitle);

	newShell.addDisposeListener(new DisposeListener() {

	@Override
	public void widgetDisposed(DisposeEvent e) {
	shellDisposed();
	}
	});
	}

	private void shellDisposed() {
	if (viewerRefresh != null) {
	for (CDOCheckout next : CDOExplorerUtil.getCheckoutManager().getCheckouts()) {
	if (next.isOpen()) {
	next.getView().removeListener(viewerRefresh);
	}
	}
	}
	}

	public boolean isAllowOverwrite() {
	return allowOverwrite;
	}

	public void setAllowOverwrite(boolean allowOverwrite) {
	this.allowOverwrite = allowOverwrite;
	}

	public EClass getNodeTypeFilter() {
	return nodeTypeFilter;
	}

	public void setNodeTypeFilter(EClass nodeTypeFilter) {
	boolean defaulted = (nodeTypeFilter == null) \|\| !EresourcePackage.Literals.CDO_RESOURCE_NODE.isSuperTypeOf(nodeTypeFilter);
	this.nodeTypeFilter = defaulted ? EresourcePackage.Literals.CDO_RESOURCE_NODE : nodeTypeFilter;
	}

	public URI getInitialURI() {
	return initialURI;
	}

	public void setInitialURI(URI initialURI) {
	this.initialURI = initialURI;
	}

	public URI getSelectedURI() {
	return (getReturnCode() != Window.OK) ? null : basicGetSelectedURI();
	}

	private URI basicGetSelectedURI() {
	URI result = null;

	if (selection != null) {
	result = selection.getURI();
	if (name != null) {
	String resourceName = Strings.emptyToNull(name);
	if (resourceName != null) {
	if (!(selection instanceof CDOResourceFolder)) {
	// append the name to the parent folder
	result = result.trimSegments(1);
	}
	result = result.appendSegment(resourceName);
	}
	}
	}

	return result;
	}

	boolean isOpenStyle() {
	return (style & SWT.OPEN) != 0;
	}

	boolean isSaveStyle() {
	return (style & SWT.SAVE) != 0;
	}

	CDOCheckout getCheckout() {
	return checkout;
	}

	@Override
	protected Control createDialogArea(Composite parent) {
	setTitle(title);
	setMessage(message);

	Composite main = (Composite) super.createDialogArea(parent);
	Composite result = new Composite(main, SWT.NONE);
	result.setLayout(new GridLayout(isSaveStyle() ? 3 : 1, false));
	result.setLayoutData(new GridData(GridData.FILL_BOTH));

	tree = new TreeViewer(result, SWT.SINGLE \| SWT.BORDER \| SWT.H_SCROLL \| SWT.V_SCROLL);
	tree.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, isSaveStyle() ? 2 : 1, 1));

	CheckoutItemProvider itemProvider = (getCheckout() == null) ? new CheckoutItemProvider(null, showConnectedRepositories()) : new CheckoutItemProvider(null, getCheckout());
	tree.setContentProvider(itemProvider);
	tree.setLabelProvider(new DecoratingLabelProvider(itemProvider, PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));
	tree.setSorter(itemProvider);
	tree.setInput(CDOExplorerUtil.getCheckoutManager());
	for (CDOCheckout next : CDOExplorerUtil.getCheckoutManager().getCheckouts()) {
	if (next.isOpen()) {
	next.getView().addListener(getViewerRefresh());
	}
	}

	if (isSaveStyle()) {
	// don't need to create new folders when opening an existing resource
	Composite actionButtons = new Composite(result, SWT.NONE);
	actionButtons.setLayoutData(new GridData(SWT.RIGHT, SWT.TOP, false, false));
	actionButtons.setLayout(new RowLayout(SWT.VERTICAL));

	ActionButton newFolderButton = new ActionButton(Messages.CheckoutBrowseDialog_newFolderAction, new CreateFolderAction(this), SWT.PUSH);
	newFolderButton.attach(tree);
	newFolderButton.createControl(actionButtons);

	// don't need to type in names of non-existent resources when opening an existing resource
	Label label = new Label(result, SWT.NONE);
	label.setText(Messages.CheckoutBrowseDialog_nameLabel);
	GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
	gd.verticalIndent = convertVerticalDLUsToPixels(8);
	label.setLayoutData(gd);

	nameText = new Text(result, SWT.BORDER);
	gd = new GridData(SWT.FILL, SWT.TOP, true, false, 2, 1);
	gd.verticalIndent = convertVerticalDLUsToPixels(8);
	nameText.setLayoutData(gd);
	}

	if (getInitialURI() != null) {
	initializeSelection();
	} else if (getCheckout() != null) {
	selection = getCheckout().getView().getRootResource();
	}

	tree.addSelectionChangedListener(new ISelectionChangedListener() {

	@Override
	public void selectionChanged(SelectionChangedEvent event) {
	IStructuredSelection sel = (IStructuredSelection) event.getSelection();
	if (sel.isEmpty()) {
	if (getCheckout() != null) {
	selection = getCheckout().getView().getRootResource();
	} else {
	selection = null;
	}
	} else {
	selection = CDOUtils.adapt(sel.getFirstElement(), CDOResourceNode.class);
	}

	validateSelection();
	}
	});

	if (nameText != null) {
	nameText.addModifyListener(new ModifyListener() {

	@Override
	public void modifyText(ModifyEvent e) {
	name = Strings.emptyToNull(nameText.getText().trim());
	validateSelection();
	}
	});
	}

	return result;
	}

	private IElementFilter showConnectedRepositories() {
	return new IElementFilter() {

	@Override
	public boolean filter(Object element) {
	boolean result = false;

	if (element instanceof CDOCheckout) {
	result = ((CDOCheckout) element).isOpen();
	}

	return result;
	}
	};
	}

	private void initializeSelection() {
	URI uri = getInitialURI();
	CDOView view = getCheckout().getView();

	String path = CDOURIUtil.extractResourcePath(uri);
	if (view.hasResource(path)) {
	selection = view.getResourceNode(path);
	tree.setSelection(new StructuredSelection(selection));
	tree.expandToLevel(selection, 1);
	if (nameText != null) {
	name = selection.getName();
	nameText.setText(name);
	}
	} else if (uri.segmentCount() > 0) {
	// try the containing folder, then
	URI parent = uri.trimSegments(1);
	path = CDOURIUtil.extractResourcePath(parent);
	if (view.hasResource(path)) {
	// if the root resource, it is represented by the checkout
	selection = view.getResourceNode(path);
	Object treeSelection = selection.isRoot() ? getCheckout() : selection;
	tree.setSelection(new StructuredSelection(treeSelection), true);
	tree.expandToLevel(treeSelection, 1);
	if (nameText != null) {
	name = uri.lastSegment();
	nameText.setText(name);
	}
	}
	} else {
	// select the checkout (representing the root resource)
	selection = view.getRootResource();
	Object treeSelection = getCheckout();
	tree.setSelection(new StructuredSelection(treeSelection), true);
	tree.expandToLevel(treeSelection, 1);
	}
	}

	private void validateSelection() {
	String error = null;
	String warning = null;
	String info = null;
	boolean disable = false;

	if (name != null) {
	if (!URI.validSegment(name)) {
	error = Messages.CheckoutBrowseDialog_invalidURISeg;
	}
	}

	if (error == null) {
	if (selection == null) {
	disable = true;
	} else {
	String path = CDOURIUtil.extractResourcePath(basicGetSelectedURI());
	CDOView view = selection.cdoView();

	if (isOpenStyle() && !view.hasResource(path)) {
	error = Messages.CheckoutBrowseDialog_noSuchResource;
	} else if (isOpenStyle()) {
	// then the resource exists. Is it the kind we want?
	CDOResourceNode node = view.getResourceNode(path);
	if (!getNodeTypeFilter().isInstance(node)) {
	disable = true;
	info = NLS.bind(Messages.CheckoutBrowseDialog_wrongSelection, getNodeType(getNodeTypeFilter()));
	}
	} else if (isSaveStyle() && view.hasResource(path)) {
	if (isAllowOverwrite()) {
	warning = Messages.CheckoutBrowseDialog_existsWarning;
	} else {
	error = Messages.CheckoutBrowseDialog_existsError;
	}
	}
	}
	}

	getButton(IDialogConstants.OK_ID).setEnabled(!disable && (error == null));
	if (error != null) {
	setMessage(error, IMessageProvider.ERROR);
	} else if (warning != null) {
	setMessage(warning, IMessageProvider.WARNING);
	} else if (info != null) {
	setMessage(info, IMessageProvider.INFORMATION);
	} else {
	setMessage(message);
	}
	}

	private String getNodeType(EClass nodeClass) {
	String result = Messages.CheckoutBrowseDialog_anyNode;

	if (nodeClass.getEPackage() == EresourcePackage.eINSTANCE) {
	switch (nodeClass.getClassifierID()) {
	case EresourcePackage.CDO_RESOURCE:
	result = Messages.CheckoutBrowseDialog_modelKind;
	break;
	case EresourcePackage.CDO_RESOURCE_FOLDER:
	result = Messages.CheckoutBrowseDialog_folderKind;
	break;
	case EresourcePackage.CDO_TEXT_RESOURCE:
	result = Messages.CheckoutBrowseDialog_textKind;
	break;
	case EresourcePackage.CDO_BINARY_RESOURCE:
	result = Messages.CheckoutBrowseDialog_binKind;
	break;
	case EresourcePackage.CDO_FILE_RESOURCE:
	result = Messages.CheckoutBrowseDialog_fileKind;
	break;
	case EresourcePackage.CDO_RESOURCE_LEAF:
	result = Messages.CheckoutBrowseDialog_leafKind;
	break;
	}
	}

	return result;
	}

	private IListener getViewerRefresh() {
	if (viewerRefresh == null) {
	viewerRefresh = new IListener() {

	@Override
	public void notifyEvent(IEvent event) {
	if (event instanceof CDOViewInvalidationEvent) {
	if ((getContents() != null) && !getContents().isDisposed()) {
	if (UIUtil.ensureUIThread(this, event)) {
	tree.refresh();
	}
	}
	}
	}
	};
	}

	return viewerRefresh;
	}
	}