bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/NewFolderDialog.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials!
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *  IBM Corporation - initial API and implementation
  * 	Sebastian Davids <sdavids@gmx.de> - Fix for bug 19346 - Dialog
  *   	font should be activated and used by other components.
 ************************************************************************/

 package org.eclipse.ui.dialogs;

 import java.lang.reflect.InvocationTargetException;
 import java.text.MessageFormat;

 import org.eclipse.core.resources.*;
 import org.eclipse.core.runtime.*;
 import org.eclipse.jface.dialogs.*;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.actions.WorkspaceModifyOperation;
 import org.eclipse.ui.help.WorkbenchHelp;
 import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
 import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
 import org.eclipse.ui.internal.ide.IHelpContextIds;
 import org.eclipse.ui.internal.ide.dialogs.CreateLinkedResourceGroup;

 /**
  * The NewFolderDialog is used to create a new folder.
  * The folder can optionally be linked to a file system folder.
  * <p>
  * NOTE:
  * A linked folder can only be created at the project
  * level. The widgets used to specify a link target are disabled
  * if the supplied container is not a project.
  * </p>
  * <p>
  * This class may be instantiated; it is not intended to be subclassed.
  * </p>
  */
 public class NewFolderDialog extends SelectionStatusDialog {
 	// widgets
 	private Text folderNameField;
 	private Button advancedButton;
 	private CreateLinkedResourceGroup linkedResourceGroup;

 	private IContainer container;
 	private boolean firstLinkCheck = true;
 	/**
 	 * Parent composite of the advanced widget group for creating
 	 * linked resources.
 	 */
 	private Composite linkedResourceParent;
 	/**
 	 * Linked resources widget group. Null if advanced section is not visible.
 	 */
 	private Composite linkedResourceComposite;
 	/**
 	 * Height of the dialog without the "advanced" linked resource group.
 	 * Set when the advanced group is first made visible.
 	 */
 	private int basicShellHeight = -1;

 /**
  * Creates a NewFolderDialog
  *
  * @param parentShell parent of the new dialog
  * @param container parent of the new folder
  */
 public NewFolderDialog(Shell parentShell, IContainer container) {
 	super(parentShell);
 	this.container = container;
 	setTitle(IDEWorkbenchMessages.getString("NewFolderDialog.title")); //$NON-NLS-1$
 	setShellStyle(getShellStyle() | SWT.RESIZE);
 	setStatusLineAboveButtons(true);
 }
 /**
  * Creates the folder using the name and link target entered
  * by the user.
  * Sets the dialog result to the created folder.
  */
 protected void computeResult() {
 	String linkTarget = linkedResourceGroup.getLinkTarget();
 	IFolder folder = createNewFolder(folderNameField.getText(), linkTarget);
 	if(folder == null)
 		return;

 	setSelectionResult(new IFolder[] {folder});
 }
 /* (non-Javadoc)
  * Method declared in Window.
  */
 protected void configureShell(Shell shell) {
 	super.configureShell(shell);
 	WorkbenchHelp.setHelp(shell, IHelpContextIds.NEW_FOLDER_DIALOG);
 }
 /**
  * @see org.eclipse.jface.window.Window#create()
  */
 public void create() {
 	super.create();
 	// initially disable the ok button since we don't preset the
 	// folder name field
 	getButton(IDialogConstants.OK_ID).setEnabled(false);
 }
 /**
  * Creates the widget for advanced options.
  *
  * @param parent the parent composite
  */
 protected void createAdvancedControls(Composite parent) {
 	Preferences preferences = ResourcesPlugin.getPlugin().getPluginPreferences();

 	if (preferences.getBoolean(ResourcesPlugin.PREF_DISABLE_LINKING) == false &&
 		isValidContainer()) {
 		linkedResourceParent = new Composite(parent, SWT.NONE);
 		linkedResourceParent.setFont(parent.getFont());
 		linkedResourceParent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		GridLayout layout = new GridLayout();
 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		linkedResourceParent.setLayout(layout);

 		advancedButton = new Button(linkedResourceParent, SWT.PUSH);
 		advancedButton.setFont(linkedResourceParent.getFont());
 		advancedButton.setText(IDEWorkbenchMessages.getString("showAdvanced")); //$NON-NLS-1$
 		setButtonLayoutData(advancedButton);
 		GridData data = (GridData) advancedButton.getLayoutData();
 		data.horizontalAlignment = GridData.BEGINNING;
 		advancedButton.setLayoutData(data);
 		advancedButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				handleAdvancedButtonSelect();
 			}
 		});
 	}
 	linkedResourceGroup = new CreateLinkedResourceGroup(
 		IResource.FOLDER,
 		new Listener() {
 			public void handleEvent(Event e) {
 				validateLinkedResource();
 				firstLinkCheck = false;
 			}
 		});
 }
 /* (non-Javadoc)
  * Method declared on Dialog.
  */
 protected Control createDialogArea(Composite parent) {
 	Composite composite = (Composite) super.createDialogArea(parent);
 	composite.setLayout(new GridLayout());
 	composite.setLayoutData(new GridData(GridData.FILL_BOTH));

 	createFolderNameGroup(composite);
 	createAdvancedControls(composite);
 	return composite;
 }
 /**
  * Creates the folder name specification controls.
  *
  * @param parent the parent composite
  */
 private void createFolderNameGroup(Composite parent) {
 	Font font = parent.getFont();
 	// project specification group
 	Composite folderGroup = new Composite(parent,SWT.NONE);
 	GridLayout layout = new GridLayout();
 	layout.numColumns = 2;
 	folderGroup.setLayout(layout);
 	folderGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 	// new project label
 	Label folderLabel = new Label(folderGroup,SWT.NONE);
 	folderLabel.setFont(font);
 	folderLabel.setText(IDEWorkbenchMessages.getString("NewFolderDialog.nameLabel"));	//$NON-NLS-1$

 	// new project name entry field
 	folderNameField = new Text(folderGroup, SWT.BORDER);
 	GridData data = new GridData(GridData.FILL_HORIZONTAL);
 	data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
 	folderNameField.setLayoutData(data);
 	folderNameField.setFont(font);
 	folderNameField.addListener(SWT.Modify, new Listener() {
 		public void handleEvent(Event event) {
 			validateLinkedResource();
 		}
 	});
 }
 /**
  * Creates a folder resource handle for the folder with the given name.
  * The folder handle is created relative to the container specified during
  * object creation.
  *
  * @param folderName the name of the folder resource to create a handle for
  * @return the new folder resource handle
  */
 private IFolder createFolderHandle(String folderName) {
 	IWorkspaceRoot workspaceRoot = container.getWorkspace().getRoot();
 	IPath folderPath = container.getFullPath().append(folderName);
 	IFolder folderHandle = workspaceRoot.getFolder(folderPath);

 	return folderHandle;
 }
 /**
  * Creates a new folder with the given name and optionally linking to
  * the specified link target.
  *
  * @param folderName name of the new folder
  * @param linkTargetName name of the link target folder. may be null.
  * @return IFolder the new folder
  */
 private IFolder createNewFolder(String folderName, final String linkTargetName) {
 	final IFolder folderHandle = createFolderHandle(folderName);

 	WorkspaceModifyOperation operation = new WorkspaceModifyOperation() {
 		public void execute(IProgressMonitor monitor) throws CoreException {
 			try {
 				monitor.beginTask(IDEWorkbenchMessages.getString("NewFolderDialog.progress"), 2000); //$NON-NLS-1$
 				if (monitor.isCanceled())
 					throw new OperationCanceledException();
 				if (linkTargetName == null)
 					folderHandle.create(false, true, monitor);
 				else
 					folderHandle.createLink(new Path(linkTargetName), IResource.ALLOW_MISSING_LOCAL, monitor);
 				if (monitor.isCanceled())
 					throw new OperationCanceledException();
 			} finally {
 				monitor.done();
 			}
 		}
 	};

 	try {
 		new ProgressMonitorDialog(getShell()).run(true, true, operation);
 	} catch (InterruptedException exception) {
 		return null;
 	} catch (InvocationTargetException exception) {
 		if (exception.getTargetException() instanceof CoreException) {
 			ErrorDialog.openError(
 				getShell(),
 				IDEWorkbenchMessages.getString("NewFolderDialog.errorTitle"),  //$NON-NLS-1$
 				null,	// no special message
 				((CoreException) exception.getTargetException()).getStatus());
 		}
 		else {
 			// CoreExceptions are handled above, but unexpected runtime exceptions and errors may still occur.
 			IDEWorkbenchPlugin.log(MessageFormat.format(
 				"Exception in {0}.createNewFolder(): {1}", 					//$NON-NLS-1$
 				new Object[] {getClass().getName(), exception.getTargetException()}));
 			MessageDialog.openError(
 				getShell(),
 				IDEWorkbenchMessages.getString("NewFolderDialog.errorTitle"), 	//$NON-NLS-1$
 				IDEWorkbenchMessages.format("NewFolderDialog.internalError", 	//$NON-NLS-1$
 				new Object[] {exception.getTargetException().getMessage()}));
 		}
 		return null;
 	}
 	return folderHandle;
 }
 /**
  * Shows/hides the advanced option widgets.
  */
 protected void handleAdvancedButtonSelect() {
 	Shell shell = getShell();
 	Point shellSize = shell.getSize();
 	Composite composite = (Composite) getDialogArea();

 	if (linkedResourceComposite != null) {
 		linkedResourceComposite.dispose();
 		linkedResourceComposite = null;
 		composite.layout();
 		shell.setSize(shellSize.x, basicShellHeight);
 		advancedButton.setText(IDEWorkbenchMessages.getString("showAdvanced")); //$NON-NLS-1$
 	} else {
 		if (basicShellHeight == -1) {
 			basicShellHeight = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y;
 		}
 		linkedResourceComposite = linkedResourceGroup.createContents(linkedResourceParent);
 		shellSize = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
 		shell.setSize(shellSize);
 		composite.layout();
 		advancedButton.setText(IDEWorkbenchMessages.getString("hideAdvanced")); //$NON-NLS-1$
 	}
 }
 /**
  * Returns whether the container specified in the constructor is
  * a valid parent for creating linked resources.
  *
  * @return boolean <code>true</code> if the container specified in
  * 	the constructor is a valid parent for creating linked resources.
  * 	<code>false</code> if no linked resources may be created with the
  * 	specified container as a parent.
  */
 private boolean isValidContainer() {
 	if (container.getType() != IResource.PROJECT)
 		return false;

 	try {
 		IWorkspace workspace = IDEWorkbenchPlugin.getPluginWorkspace();
 		IProject project = (IProject) container;
 		String[] natureIds = project.getDescription().getNatureIds();

 		for (int i = 0; i < natureIds.length; i++) {
 			IProjectNatureDescriptor descriptor = workspace.getNatureDescriptor(natureIds[i]);
 			if (descriptor != null && descriptor.isLinkingAllowed() == false)
 				return false;
 		}
 	} catch (CoreException exception) {
 		// project does not exist or is closed
 		return false;
 	}
 	return true;
 }
 /**
  * Update the dialog's status line to reflect the given status. It is safe to call
  * this method before the dialog has been opened.
  */
 protected void updateStatus(IStatus status) {
 	if (firstLinkCheck && status != null) {
 		// don't show the first validation result as an error.
 		// fixes bug 29659
 		Status newStatus = new Status(
 			IStatus.OK,
 			status.getPlugin(),
 			status.getCode(),
 			status.getMessage(),
 			status.getException());
 		super.updateStatus(newStatus);
 	}
 	else {
 		super.updateStatus(status);
 	}
 }
 /**
  * Update the dialog's status line to reflect the given status. It is safe to call
  * this method before the dialog has been opened.
  */
 private void updateStatus(int severity, String message) {
 	updateStatus(
 		new Status(
 			severity,
 			IDEWorkbenchPlugin.getDefault().getDescriptor().getUniqueIdentifier(),
 			severity,
 			message,
 			null));
 }
 /**
  * Checks whether the folder name and link location are valid.
  *
  * @return null if the folder name and link location are valid.
  * 	a message that indicates the problem otherwise.
  */
 private void validateLinkedResource() {
 	boolean valid = validateFolderName();

 	if (valid) {
 		IFolder linkHandle = createFolderHandle(folderNameField.getText());
 		IStatus status = linkedResourceGroup.validateLinkLocation(linkHandle);

 		if (status.getSeverity() != IStatus.ERROR)
 			getOkButton().setEnabled(true);
 		else
 			getOkButton().setEnabled(false);

 		if (status.isOK() == false)
 			updateStatus(status);
 	}
 	else
 		getOkButton().setEnabled(false);
 }
 /**
  * Checks if the folder name is valid.
  *
  * @return null if the new folder name is valid.
  * 	a message that indicates the problem otherwise.
  */
 private boolean validateFolderName() {
 	String name = folderNameField.getText();
 	IWorkspace workspace = container.getWorkspace();
 	IStatus nameStatus = workspace.validateName(name, IResource.FOLDER);

 	if ("".equals(name)) { //$NON-NLS-1$
 		updateStatus(IStatus.ERROR, IDEWorkbenchMessages.getString("NewFolderDialog.folderNameEmpty"));	//$NON-NLS-1$
 		return false;
 	}
 	if (nameStatus.isOK() == false) {
 		updateStatus(nameStatus);
 		return false;
 	}
 	IPath path = new Path(name);
 	if (container.getFolder(path).exists() || container.getFile(path).exists()) {
 		updateStatus(IStatus.ERROR, IDEWorkbenchMessages.format("NewFolderDialog.alreadyExists", new Object[] { name }));	//$NON-NLS-1$
 		return false;
 	}
 	updateStatus(IStatus.OK, "");	//$NON-NLS-1$
 	return true;
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials!
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Sebastian Davids <sdavids@gmx.de> - Fix for bug 19346 - Dialog
	* font should be activated and used by other components.
	************************************************************************/

	package org.eclipse.ui.dialogs;

	import java.lang.reflect.InvocationTargetException;
	import java.text.MessageFormat;

	import org.eclipse.core.resources.*;
	import org.eclipse.core.runtime.*;
	import org.eclipse.jface.dialogs.*;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Font;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.ui.actions.WorkspaceModifyOperation;
	import org.eclipse.ui.help.WorkbenchHelp;
	import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
	import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
	import org.eclipse.ui.internal.ide.IHelpContextIds;
	import org.eclipse.ui.internal.ide.dialogs.CreateLinkedResourceGroup;

	/**
	* The NewFolderDialog is used to create a new folder.
	* The folder can optionally be linked to a file system folder.
	* <p>
	* NOTE:
	* A linked folder can only be created at the project
	* level. The widgets used to specify a link target are disabled
	* if the supplied container is not a project.
	* </p>
	* <p>
	* This class may be instantiated; it is not intended to be subclassed.
	* </p>
	*/
	public class NewFolderDialog extends SelectionStatusDialog {
	// widgets
	private Text folderNameField;
	private Button advancedButton;
	private CreateLinkedResourceGroup linkedResourceGroup;

	private IContainer container;
	private boolean firstLinkCheck = true;
	/**
	* Parent composite of the advanced widget group for creating
	* linked resources.
	*/
	private Composite linkedResourceParent;
	/**
	* Linked resources widget group. Null if advanced section is not visible.
	*/
	private Composite linkedResourceComposite;
	/**
	* Height of the dialog without the "advanced" linked resource group.
	* Set when the advanced group is first made visible.
	*/
	private int basicShellHeight = -1;

	/**
	* Creates a NewFolderDialog
	*
	* @param parentShell parent of the new dialog
	* @param container parent of the new folder
	*/
	public NewFolderDialog(Shell parentShell, IContainer container) {
	super(parentShell);
	this.container = container;
	setTitle(IDEWorkbenchMessages.getString("NewFolderDialog.title")); //$NON-NLS-1$
	setShellStyle(getShellStyle() \| SWT.RESIZE);
	setStatusLineAboveButtons(true);
	}
	/**
	* Creates the folder using the name and link target entered
	* by the user.
	* Sets the dialog result to the created folder.
	*/
	protected void computeResult() {
	String linkTarget = linkedResourceGroup.getLinkTarget();
	IFolder folder = createNewFolder(folderNameField.getText(), linkTarget);
	if(folder == null)
	return;

	setSelectionResult(new IFolder[] {folder});
	}
	/* (non-Javadoc)
	* Method declared in Window.
	*/
	protected void configureShell(Shell shell) {
	super.configureShell(shell);
	WorkbenchHelp.setHelp(shell, IHelpContextIds.NEW_FOLDER_DIALOG);
	}
	/**
	* @see org.eclipse.jface.window.Window#create()
	*/
	public void create() {
	super.create();
	// initially disable the ok button since we don't preset the
	// folder name field
	getButton(IDialogConstants.OK_ID).setEnabled(false);
	}
	/**
	* Creates the widget for advanced options.
	*
	* @param parent the parent composite
	*/
	protected void createAdvancedControls(Composite parent) {
	Preferences preferences = ResourcesPlugin.getPlugin().getPluginPreferences();

	if (preferences.getBoolean(ResourcesPlugin.PREF_DISABLE_LINKING) == false &&
	isValidContainer()) {
	linkedResourceParent = new Composite(parent, SWT.NONE);
	linkedResourceParent.setFont(parent.getFont());
	linkedResourceParent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	GridLayout layout = new GridLayout();
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	linkedResourceParent.setLayout(layout);

	advancedButton = new Button(linkedResourceParent, SWT.PUSH);
	advancedButton.setFont(linkedResourceParent.getFont());
	advancedButton.setText(IDEWorkbenchMessages.getString("showAdvanced")); //$NON-NLS-1$
	setButtonLayoutData(advancedButton);
	GridData data = (GridData) advancedButton.getLayoutData();
	data.horizontalAlignment = GridData.BEGINNING;
	advancedButton.setLayoutData(data);
	advancedButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	handleAdvancedButtonSelect();
	}
	});
	}
	linkedResourceGroup = new CreateLinkedResourceGroup(
	IResource.FOLDER,
	new Listener() {
	public void handleEvent(Event e) {
	validateLinkedResource();
	firstLinkCheck = false;
	}
	});
	}
	/* (non-Javadoc)
	* Method declared on Dialog.
	*/
	protected Control createDialogArea(Composite parent) {
	Composite composite = (Composite) super.createDialogArea(parent);
	composite.setLayout(new GridLayout());
	composite.setLayoutData(new GridData(GridData.FILL_BOTH));

	createFolderNameGroup(composite);
	createAdvancedControls(composite);
	return composite;
	}
	/**
	* Creates the folder name specification controls.
	*
	* @param parent the parent composite
	*/
	private void createFolderNameGroup(Composite parent) {
	Font font = parent.getFont();
	// project specification group
	Composite folderGroup = new Composite(parent,SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 2;
	folderGroup.setLayout(layout);
	folderGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	// new project label
	Label folderLabel = new Label(folderGroup,SWT.NONE);
	folderLabel.setFont(font);
	folderLabel.setText(IDEWorkbenchMessages.getString("NewFolderDialog.nameLabel")); //$NON-NLS-1$

	// new project name entry field
	folderNameField = new Text(folderGroup, SWT.BORDER);
	GridData data = new GridData(GridData.FILL_HORIZONTAL);
	data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
	folderNameField.setLayoutData(data);
	folderNameField.setFont(font);
	folderNameField.addListener(SWT.Modify, new Listener() {
	public void handleEvent(Event event) {
	validateLinkedResource();
	}
	});
	}
	/**
	* Creates a folder resource handle for the folder with the given name.
	* The folder handle is created relative to the container specified during
	* object creation.
	*
	* @param folderName the name of the folder resource to create a handle for
	* @return the new folder resource handle
	*/
	private IFolder createFolderHandle(String folderName) {
	IWorkspaceRoot workspaceRoot = container.getWorkspace().getRoot();
	IPath folderPath = container.getFullPath().append(folderName);
	IFolder folderHandle = workspaceRoot.getFolder(folderPath);

	return folderHandle;
	}
	/**
	* Creates a new folder with the given name and optionally linking to
	* the specified link target.
	*
	* @param folderName name of the new folder
	* @param linkTargetName name of the link target folder. may be null.
	* @return IFolder the new folder
	*/
	private IFolder createNewFolder(String folderName, final String linkTargetName) {
	final IFolder folderHandle = createFolderHandle(folderName);

	WorkspaceModifyOperation operation = new WorkspaceModifyOperation() {
	public void execute(IProgressMonitor monitor) throws CoreException {
	try {
	monitor.beginTask(IDEWorkbenchMessages.getString("NewFolderDialog.progress"), 2000); //$NON-NLS-1$
	if (monitor.isCanceled())
	throw new OperationCanceledException();
	if (linkTargetName == null)
	folderHandle.create(false, true, monitor);
	else
	folderHandle.createLink(new Path(linkTargetName), IResource.ALLOW_MISSING_LOCAL, monitor);
	if (monitor.isCanceled())
	throw new OperationCanceledException();
	} finally {
	monitor.done();
	}
	}
	};

	try {
	new ProgressMonitorDialog(getShell()).run(true, true, operation);
	} catch (InterruptedException exception) {
	return null;
	} catch (InvocationTargetException exception) {
	if (exception.getTargetException() instanceof CoreException) {
	ErrorDialog.openError(
	getShell(),
	IDEWorkbenchMessages.getString("NewFolderDialog.errorTitle"), //$NON-NLS-1$
	null, // no special message
	((CoreException) exception.getTargetException()).getStatus());
	}
	else {
	// CoreExceptions are handled above, but unexpected runtime exceptions and errors may still occur.
	IDEWorkbenchPlugin.log(MessageFormat.format(
	"Exception in {0}.createNewFolder(): {1}", //$NON-NLS-1$
	new Object[] {getClass().getName(), exception.getTargetException()}));
	MessageDialog.openError(
	getShell(),
	IDEWorkbenchMessages.getString("NewFolderDialog.errorTitle"), //$NON-NLS-1$
	IDEWorkbenchMessages.format("NewFolderDialog.internalError", //$NON-NLS-1$
	new Object[] {exception.getTargetException().getMessage()}));
	}
	return null;
	}
	return folderHandle;
	}
	/**
	* Shows/hides the advanced option widgets.
	*/
	protected void handleAdvancedButtonSelect() {
	Shell shell = getShell();
	Point shellSize = shell.getSize();
	Composite composite = (Composite) getDialogArea();

	if (linkedResourceComposite != null) {
	linkedResourceComposite.dispose();
	linkedResourceComposite = null;
	composite.layout();
	shell.setSize(shellSize.x, basicShellHeight);
	advancedButton.setText(IDEWorkbenchMessages.getString("showAdvanced")); //$NON-NLS-1$
	} else {
	if (basicShellHeight == -1) {
	basicShellHeight = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y;
	}
	linkedResourceComposite = linkedResourceGroup.createContents(linkedResourceParent);
	shellSize = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
	shell.setSize(shellSize);
	composite.layout();
	advancedButton.setText(IDEWorkbenchMessages.getString("hideAdvanced")); //$NON-NLS-1$
	}
	}
	/**
	* Returns whether the container specified in the constructor is
	* a valid parent for creating linked resources.
	*
	* @return boolean <code>true</code> if the container specified in
	* the constructor is a valid parent for creating linked resources.
	* <code>false</code> if no linked resources may be created with the
	* specified container as a parent.
	*/
	private boolean isValidContainer() {
	if (container.getType() != IResource.PROJECT)
	return false;

	try {
	IWorkspace workspace = IDEWorkbenchPlugin.getPluginWorkspace();
	IProject project = (IProject) container;
	String[] natureIds = project.getDescription().getNatureIds();

	for (int i = 0; i < natureIds.length; i++) {
	IProjectNatureDescriptor descriptor = workspace.getNatureDescriptor(natureIds[i]);
	if (descriptor != null && descriptor.isLinkingAllowed() == false)
	return false;
	}
	} catch (CoreException exception) {
	// project does not exist or is closed
	return false;
	}
	return true;
	}
	/**
	* Update the dialog's status line to reflect the given status. It is safe to call
	* this method before the dialog has been opened.
	*/
	protected void updateStatus(IStatus status) {
	if (firstLinkCheck && status != null) {
	// don't show the first validation result as an error.
	// fixes bug 29659
	Status newStatus = new Status(
	IStatus.OK,
	status.getPlugin(),
	status.getCode(),
	status.getMessage(),
	status.getException());
	super.updateStatus(newStatus);
	}
	else {
	super.updateStatus(status);
	}
	}
	/**
	* Update the dialog's status line to reflect the given status. It is safe to call
	* this method before the dialog has been opened.
	*/
	private void updateStatus(int severity, String message) {
	updateStatus(
	new Status(
	severity,
	IDEWorkbenchPlugin.getDefault().getDescriptor().getUniqueIdentifier(),
	severity,
	message,
	null));
	}
	/**
	* Checks whether the folder name and link location are valid.
	*
	* @return null if the folder name and link location are valid.
	* a message that indicates the problem otherwise.
	*/
	private void validateLinkedResource() {
	boolean valid = validateFolderName();

	if (valid) {
	IFolder linkHandle = createFolderHandle(folderNameField.getText());
	IStatus status = linkedResourceGroup.validateLinkLocation(linkHandle);

	if (status.getSeverity() != IStatus.ERROR)
	getOkButton().setEnabled(true);
	else
	getOkButton().setEnabled(false);

	if (status.isOK() == false)
	updateStatus(status);
	}
	else
	getOkButton().setEnabled(false);
	}
	/**
	* Checks if the folder name is valid.
	*
	* @return null if the new folder name is valid.
	* a message that indicates the problem otherwise.
	*/
	private boolean validateFolderName() {
	String name = folderNameField.getText();
	IWorkspace workspace = container.getWorkspace();
	IStatus nameStatus = workspace.validateName(name, IResource.FOLDER);

	if ("".equals(name)) { //$NON-NLS-1$
	updateStatus(IStatus.ERROR, IDEWorkbenchMessages.getString("NewFolderDialog.folderNameEmpty")); //$NON-NLS-1$
	return false;
	}
	if (nameStatus.isOK() == false) {
	updateStatus(nameStatus);
	return false;
	}
	IPath path = new Path(name);
	if (container.getFolder(path).exists() \|\| container.getFile(path).exists()) {
	updateStatus(IStatus.ERROR, IDEWorkbenchMessages.format("NewFolderDialog.alreadyExists", new Object[] { name })); //$NON-NLS-1$
	return false;
	}
	updateStatus(IStatus.OK, ""); //$NON-NLS-1$
	return true;
	}
	}