bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ProjectContentsLocationArea.java - platform/eclipse.platform.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2009 IBM Corporation 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:
  *     IBM Corporation - initial API and implementation
  *     Neil Rickards <neil.rickards@arm.com> - fix for Bug 161026
  *     		[Wizards] ProjectContentsLocationArea uses wrong file separator
  *     Oakland Software Incorporated (Francis Upton) <francisu@ieee.org>
  *		    Bug 224997 [Workbench] Impossible to copy project
  *     Alena Laskavaia - fix for bug 2035
  *******************************************************************************/

 package org.eclipse.ui.internal.ide.dialogs;

 import java.net.URI;
 import java.net.URISyntaxException;

 import org.eclipse.core.filesystem.IFileInfo;
 import org.eclipse.core.filesystem.URIUtil;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.osgi.util.TextProcessor;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.DirectoryDialog;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
 import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
 import org.eclipse.ui.internal.ide.filesystem.FileSystemConfiguration;
 import org.eclipse.ui.internal.ide.filesystem.FileSystemSupportRegistry;

 /**
  * ProjectContentsLocationArea is a convenience class for area that handle entry
  * of locations using URIs.
  *
  * @since 3.2
  *
  */
 public class ProjectContentsLocationArea {
 	/**
 	 * IErrorMessageReporter is an interface for type that allow message
 	 * reporting.
 	 *
 	 */
 	public interface IErrorMessageReporter {
 		/**
 		 * Report the error message
 		 *
 		 * @param errorMessage
 		 *            String or <code>null</code>. If the errorMessage is
 		 *            null then clear any error state.
 		 * @param infoOnly
 		 *            the message is an informational message, but the dialog
 		 *            cannot continue
 		 *
 		 */
 		public void reportError(String errorMessage, boolean infoOnly);
 	}

 	private static String BROWSE_LABEL = IDEWorkbenchMessages.ProjectLocationSelectionDialog_browseLabel;

 	private static final int SIZING_TEXT_FIELD_WIDTH = 250;

 	private static final String FILE_SCHEME = "file"; //$NON-NLS-1$

 	private static final String SAVED_LOCATION_ATTR = "OUTSIDE_LOCATION"; //$NON-NLS-1$

 	private Label locationLabel;

 	private Text locationPathField;

 	private Button browseButton;

 	private IErrorMessageReporter errorReporter;

 	private String projectName = IDEResourceInfoUtils.EMPTY_STRING;

 	private String userPath = IDEResourceInfoUtils.EMPTY_STRING;

 	private Button useDefaultsButton;

 	private IProject existingProject;

 	private FileSystemSelectionArea fileSystemSelectionArea;

 	/**
 	 * Create a new instance of the receiver.
 	 *
 	 * @param reporter
 	 * @param composite
 	 * @param startProject
 	 */
 	public ProjectContentsLocationArea(IErrorMessageReporter reporter,
 			Composite composite, IProject startProject) {

 		errorReporter = reporter;
 		projectName = startProject.getName();
 		existingProject = startProject;
 		createContents(composite, false);
 	}

 	/**
 	 * Set the project to base the contents off of.
 	 *
 	 * @param existingProject
 	 */
 	public void setExistingProject(IProject existingProject) {
 		projectName = existingProject.getName();
 		this.existingProject = existingProject;
 	}

 	/**
 	 * Create a new instance of a ProjectContentsLocationArea.
 	 *
 	 * @param reporter
 	 * @param composite
 	 */
 	public ProjectContentsLocationArea(IErrorMessageReporter reporter,
 			Composite composite) {
 		errorReporter = reporter;

 		// If it is a new project always start enabled
 		createContents(composite, true);
 	}

 	/**
 	 * Create the contents of the receiver.
 	 *
 	 * @param composite
 	 * @param defaultEnabled
 	 */
 	private void createContents(Composite composite, boolean defaultEnabled) {

 		int columns = 4;

 		// project specification group
 		Composite projectGroup = new Composite(composite, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = columns;
 		projectGroup.setLayout(layout);
 		projectGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		useDefaultsButton = new Button(projectGroup, SWT.CHECK | SWT.RIGHT);
 		useDefaultsButton
 				.setText(IDEWorkbenchMessages.ProjectLocationSelectionDialog_useDefaultLabel);
 		useDefaultsButton.setSelection(defaultEnabled);
 		GridData buttonData = new GridData();
 		buttonData.horizontalSpan = columns;
 		useDefaultsButton.setLayoutData(buttonData);

 		createUserEntryArea(projectGroup, defaultEnabled);

 		useDefaultsButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				boolean useDefaults = useDefaultsButton.getSelection();

 				if (useDefaults) {
 					userPath = locationPathField.getText();
 					locationPathField.setText(TextProcessor
 							.process(getDefaultPathDisplayString()));
 				} else {
 					locationPathField.setText(TextProcessor.process(userPath));
 				}
 				String error = checkValidLocation();
 				errorReporter.reportError(error,
 						error != null && error.equals(IDEWorkbenchMessages.WizardNewProjectCreationPage_projectLocationEmpty));
 				setUserAreaEnabled(!useDefaults);
 			}
 		});
 		setUserAreaEnabled(!defaultEnabled);
 	}

 	/**
 	 * Return whether or not we are currently showing the default location for
 	 * the project.
 	 *
 	 * @return boolean
 	 */
 	public boolean isDefault() {
 		return useDefaultsButton.getSelection();
 	}

 	/**
 	 * Create the area for user entry.
 	 *
 	 * @param composite
 	 * @param defaultEnabled
 	 */
 	private void createUserEntryArea(Composite composite, boolean defaultEnabled) {
 		// location label
 		locationLabel = new Label(composite, SWT.NONE);
 		locationLabel
 				.setText(IDEWorkbenchMessages.ProjectLocationSelectionDialog_locationLabel);

 		// project location entry field
 		locationPathField = new Text(composite, SWT.BORDER);
 		GridData data = new GridData(GridData.FILL_HORIZONTAL);
 		data.widthHint = SIZING_TEXT_FIELD_WIDTH;
 		data.horizontalSpan = 2;
 		locationPathField.setLayoutData(data);

 		// browse button
 		browseButton = new Button(composite, SWT.PUSH);
 		browseButton.setText(BROWSE_LABEL);
 		browseButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent event) {
 				handleLocationBrowseButtonPressed();
 			}
 		});

 		createFileSystemSelection(composite);

 		if (defaultEnabled) {
 			locationPathField.setText(TextProcessor
 					.process(getDefaultPathDisplayString()));
 		} else {
 			if (existingProject == null) {
 				locationPathField.setText(IDEResourceInfoUtils.EMPTY_STRING);
 			} else {
 				locationPathField.setText(TextProcessor.process(existingProject
 						.getLocation().toOSString()));
 			}
 		}

 		locationPathField.addModifyListener(new ModifyListener() {
 			/*
 			 * (non-Javadoc)
 			 *
 			 * @see org.eclipse.swt.events.ModifyListener#modifyText(org.eclipse.swt.events.ModifyEvent)
 			 */
 			public void modifyText(ModifyEvent e) {
 				errorReporter.reportError(checkValidLocation(), false);
 			}
 		});
 	}

 	/**
 	 * Create the file system selection area.
 	 *
 	 * @param composite
 	 */
 	private void createFileSystemSelection(Composite composite) {

 		// Always use the default if that is all there is.
 		if (FileSystemSupportRegistry.getInstance().hasOneFileSystem()) {
 			return;
 		}

 		new Label(composite, SWT.NONE);

 		fileSystemSelectionArea = new FileSystemSelectionArea();
 		fileSystemSelectionArea.createContents(composite);
 	}

 	/**
 	 * Return the path we are going to display. If it is a file URI then remove
 	 * the file prefix.
 	 *
 	 * @return String
 	 */
 	private String getDefaultPathDisplayString() {

 		URI defaultURI = null;
 		if (existingProject != null) {
 			defaultURI = existingProject.getLocationURI();
 		}

 		// Handle files specially. Assume a file if there is no project to query
 		if (defaultURI == null || defaultURI.getScheme().equals(FILE_SCHEME)) {
 			return Platform.getLocation().append(projectName).toOSString();
 		}
 		return defaultURI.toString();

 	}

 	/**
 	 * Set the enablement state of the receiver.
 	 *
 	 * @param enabled
 	 */
 	private void setUserAreaEnabled(boolean enabled) {

 		locationLabel.setEnabled(enabled);
 		locationPathField.setEnabled(enabled);
 		browseButton.setEnabled(enabled);
 		if (fileSystemSelectionArea != null) {
 			fileSystemSelectionArea.setEnabled(enabled);
 		}
 	}

 	/**
 	 * Return the browse button. Usually referenced in order to set the layout
 	 * data for a dialog.
 	 *
 	 * @return Button
 	 */
 	public Button getBrowseButton() {
 		return browseButton;
 	}

 	private IDialogSettings getDialogSettings() {
 		IDialogSettings ideDialogSettings = IDEWorkbenchPlugin.getDefault().getDialogSettings();
 		IDialogSettings result = ideDialogSettings.getSection(getClass().getName());
 		if (result == null) {
 			result = ideDialogSettings.addNewSection(getClass().getName());
 		}
 		return result;
 	}

 	/**
 	 * Open an appropriate directory browser
 	 */
 	private void handleLocationBrowseButtonPressed() {

 		String selectedDirectory = null;
 		String dirName = getPathFromLocationField();

 		if (!dirName.equals(IDEResourceInfoUtils.EMPTY_STRING)) {
 			IFileInfo info;
 			info = IDEResourceInfoUtils.getFileInfo(dirName);

 			if (info == null || !(info.exists()))
 				dirName = IDEResourceInfoUtils.EMPTY_STRING;
 		} else {
 			String value = getDialogSettings().get(SAVED_LOCATION_ATTR);
 			if (value != null) {
 				dirName = value;
 			}
 		}

 		FileSystemConfiguration config = getSelectedConfiguration();
 		if (config== null || config.equals(
 				FileSystemSupportRegistry.getInstance()
 						.getDefaultConfiguration())) {
 			DirectoryDialog dialog = new DirectoryDialog(locationPathField
 					.getShell(), SWT.SHEET);
 			dialog
 					.setMessage(IDEWorkbenchMessages.ProjectLocationSelectionDialog_directoryLabel);

 			dialog.setFilterPath(dirName);

 			selectedDirectory = dialog.open();

 		} else {
 			URI uri = getSelectedConfiguration().getContributor()
 					.browseFileSystem(dirName, browseButton.getShell());
 			if (uri != null)
 				selectedDirectory = uri.toString();
 		}

 		if (selectedDirectory != null) {
 			updateLocationField(selectedDirectory);
 			getDialogSettings().put(SAVED_LOCATION_ATTR, selectedDirectory);
 		}
 	}

 	/**
 	 * Update the location field based on the selected path.
 	 *
 	 * @param selectedPath
 	 */
 	private void updateLocationField(String selectedPath) {
 		locationPathField.setText(TextProcessor.process(selectedPath));
 	}

 	/**
 	 * Return the path on the location field.
 	 *
 	 * @return String
 	 */
 	private String getPathFromLocationField() {
 		URI fieldURI;
 		try {
 			fieldURI = new URI(locationPathField.getText());
 		} catch (URISyntaxException e) {
 			return locationPathField.getText();
 		}
 		return fieldURI.getPath();
 	}

 	/**
 	 * Check if the entry in the widget location is valid. If it is valid return
 	 * null. Otherwise return a string that indicates the problem.
 	 *
 	 * @return String
 	 */
 	public String checkValidLocation() {

 		String locationFieldContents = locationPathField.getText();
 		if (locationFieldContents.length() == 0) {
 			return IDEWorkbenchMessages.WizardNewProjectCreationPage_projectLocationEmpty;
 		}

 		URI newPath = getProjectLocationURI();
 		if (newPath == null) {
 			return IDEWorkbenchMessages.ProjectLocationSelectionDialog_locationError;
 		}

 		if (existingProject != null) {
 			URI projectPath = existingProject.getLocationURI();
 			if (projectPath != null && URIUtil.equals(projectPath, newPath)) {
 				return IDEWorkbenchMessages.ProjectLocationSelectionDialog_locationIsSelf;
 			}
 		}

 		if (!isDefault()) {
 			IStatus locationStatus = ResourcesPlugin.getWorkspace()
 					.validateProjectLocationURI(existingProject, newPath);

 			if (!locationStatus.isOK()) {
 				return locationStatus.getMessage();
 			}
 		}

 		return null;
 	}

 	/**
 	 * Get the URI for the location field if possible.
 	 *
 	 * @return URI or <code>null</code> if it is not valid.
 	 */
 	public URI getProjectLocationURI() {

 		FileSystemConfiguration configuration = getSelectedConfiguration();
 		if (configuration == null) {
 			return null;
 		}

 		return configuration.getContributor().getURI(
 				locationPathField.getText());

 	}

 	/**
 	 * Return the selected contributor
 	 *
 	 * @return FileSystemConfiguration or <code>null</code> if it cannot be
 	 *         determined.
 	 */
 	private FileSystemConfiguration getSelectedConfiguration() {
 		if (fileSystemSelectionArea == null) {
 			return FileSystemSupportRegistry.getInstance()
 					.getDefaultConfiguration();
 		}

 		return fileSystemSelectionArea.getSelectedConfiguration();
 	}

 	/**
 	 * Set the text to the default or clear it if not using the defaults.
 	 *
 	 * @param newName
 	 *            the name of the project to use. If <code>null</code> use the
 	 *            existing project name.
 	 */
 	public void updateProjectName(String newName) {
 		projectName = newName;
 		if (isDefault()) {
 			locationPathField.setText(TextProcessor
 					.process(getDefaultPathDisplayString()));
 		}

 	}

 	/**
 	 * Return the location for the project. If we are using defaults then return
 	 * the workspace root so that core creates it with default values.
 	 *
 	 * @return String
 	 */
 	public String getProjectLocation() {
 		if (isDefault()) {
 			return Platform.getLocation().toOSString();
 		}
 		return locationPathField.getText();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2009 IBM Corporation 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:
	* IBM Corporation - initial API and implementation
	* Neil Rickards <neil.rickards@arm.com> - fix for Bug 161026
	* [Wizards] ProjectContentsLocationArea uses wrong file separator
	* Oakland Software Incorporated (Francis Upton) <francisu@ieee.org>
	* Bug 224997 [Workbench] Impossible to copy project
	* Alena Laskavaia - fix for bug 2035
	*******************************************************************************/

	package org.eclipse.ui.internal.ide.dialogs;

	import java.net.URI;
	import java.net.URISyntaxException;

	import org.eclipse.core.filesystem.IFileInfo;
	import org.eclipse.core.filesystem.URIUtil;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.osgi.util.TextProcessor;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.DirectoryDialog;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
	import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
	import org.eclipse.ui.internal.ide.filesystem.FileSystemConfiguration;
	import org.eclipse.ui.internal.ide.filesystem.FileSystemSupportRegistry;

	/**
	* ProjectContentsLocationArea is a convenience class for area that handle entry
	* of locations using URIs.
	*
	* @since 3.2
	*
	*/
	public class ProjectContentsLocationArea {
	/**
	* IErrorMessageReporter is an interface for type that allow message
	* reporting.
	*
	*/
	public interface IErrorMessageReporter {
	/**
	* Report the error message
	*
	* @param errorMessage
	* String or <code>null</code>. If the errorMessage is
	* null then clear any error state.
	* @param infoOnly
	* the message is an informational message, but the dialog
	* cannot continue
	*
	*/
	public void reportError(String errorMessage, boolean infoOnly);
	}

	private static String BROWSE_LABEL = IDEWorkbenchMessages.ProjectLocationSelectionDialog_browseLabel;

	private static final int SIZING_TEXT_FIELD_WIDTH = 250;

	private static final String FILE_SCHEME = "file"; //$NON-NLS-1$

	private static final String SAVED_LOCATION_ATTR = "OUTSIDE_LOCATION"; //$NON-NLS-1$

	private Label locationLabel;

	private Text locationPathField;

	private Button browseButton;

	private IErrorMessageReporter errorReporter;

	private String projectName = IDEResourceInfoUtils.EMPTY_STRING;

	private String userPath = IDEResourceInfoUtils.EMPTY_STRING;

	private Button useDefaultsButton;

	private IProject existingProject;

	private FileSystemSelectionArea fileSystemSelectionArea;

	/**
	* Create a new instance of the receiver.
	*
	* @param reporter
	* @param composite
	* @param startProject
	*/
	public ProjectContentsLocationArea(IErrorMessageReporter reporter,
	Composite composite, IProject startProject) {

	errorReporter = reporter;
	projectName = startProject.getName();
	existingProject = startProject;
	createContents(composite, false);
	}

	/**
	* Set the project to base the contents off of.
	*
	* @param existingProject
	*/
	public void setExistingProject(IProject existingProject) {
	projectName = existingProject.getName();
	this.existingProject = existingProject;
	}

	/**
	* Create a new instance of a ProjectContentsLocationArea.
	*
	* @param reporter
	* @param composite
	*/
	public ProjectContentsLocationArea(IErrorMessageReporter reporter,
	Composite composite) {
	errorReporter = reporter;

	// If it is a new project always start enabled
	createContents(composite, true);
	}

	/**
	* Create the contents of the receiver.
	*
	* @param composite
	* @param defaultEnabled
	*/
	private void createContents(Composite composite, boolean defaultEnabled) {

	int columns = 4;

	// project specification group
	Composite projectGroup = new Composite(composite, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = columns;
	projectGroup.setLayout(layout);
	projectGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	useDefaultsButton = new Button(projectGroup, SWT.CHECK \| SWT.RIGHT);
	useDefaultsButton
	.setText(IDEWorkbenchMessages.ProjectLocationSelectionDialog_useDefaultLabel);
	useDefaultsButton.setSelection(defaultEnabled);
	GridData buttonData = new GridData();
	buttonData.horizontalSpan = columns;
	useDefaultsButton.setLayoutData(buttonData);

	createUserEntryArea(projectGroup, defaultEnabled);

	useDefaultsButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	boolean useDefaults = useDefaultsButton.getSelection();

	if (useDefaults) {
	userPath = locationPathField.getText();
	locationPathField.setText(TextProcessor
	.process(getDefaultPathDisplayString()));
	} else {
	locationPathField.setText(TextProcessor.process(userPath));
	}
	String error = checkValidLocation();
	errorReporter.reportError(error,
	error != null && error.equals(IDEWorkbenchMessages.WizardNewProjectCreationPage_projectLocationEmpty));
	setUserAreaEnabled(!useDefaults);
	}
	});
	setUserAreaEnabled(!defaultEnabled);
	}

	/**
	* Return whether or not we are currently showing the default location for
	* the project.
	*
	* @return boolean
	*/
	public boolean isDefault() {
	return useDefaultsButton.getSelection();
	}

	/**
	* Create the area for user entry.
	*
	* @param composite
	* @param defaultEnabled
	*/
	private void createUserEntryArea(Composite composite, boolean defaultEnabled) {
	// location label
	locationLabel = new Label(composite, SWT.NONE);
	locationLabel
	.setText(IDEWorkbenchMessages.ProjectLocationSelectionDialog_locationLabel);

	// project location entry field
	locationPathField = new Text(composite, SWT.BORDER);
	GridData data = new GridData(GridData.FILL_HORIZONTAL);
	data.widthHint = SIZING_TEXT_FIELD_WIDTH;
	data.horizontalSpan = 2;
	locationPathField.setLayoutData(data);

	// browse button
	browseButton = new Button(composite, SWT.PUSH);
	browseButton.setText(BROWSE_LABEL);
	browseButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent event) {
	handleLocationBrowseButtonPressed();
	}
	});

	createFileSystemSelection(composite);

	if (defaultEnabled) {
	locationPathField.setText(TextProcessor
	.process(getDefaultPathDisplayString()));
	} else {
	if (existingProject == null) {
	locationPathField.setText(IDEResourceInfoUtils.EMPTY_STRING);
	} else {
	locationPathField.setText(TextProcessor.process(existingProject
	.getLocation().toOSString()));
	}
	}

	locationPathField.addModifyListener(new ModifyListener() {
	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.swt.events.ModifyListener#modifyText(org.eclipse.swt.events.ModifyEvent)
	*/
	public void modifyText(ModifyEvent e) {
	errorReporter.reportError(checkValidLocation(), false);
	}
	});
	}

	/**
	* Create the file system selection area.
	*
	* @param composite
	*/
	private void createFileSystemSelection(Composite composite) {

	// Always use the default if that is all there is.
	if (FileSystemSupportRegistry.getInstance().hasOneFileSystem()) {
	return;
	}

	new Label(composite, SWT.NONE);

	fileSystemSelectionArea = new FileSystemSelectionArea();
	fileSystemSelectionArea.createContents(composite);
	}

	/**
	* Return the path we are going to display. If it is a file URI then remove
	* the file prefix.
	*
	* @return String
	*/
	private String getDefaultPathDisplayString() {

	URI defaultURI = null;
	if (existingProject != null) {
	defaultURI = existingProject.getLocationURI();
	}

	// Handle files specially. Assume a file if there is no project to query
	if (defaultURI == null \|\| defaultURI.getScheme().equals(FILE_SCHEME)) {
	return Platform.getLocation().append(projectName).toOSString();
	}
	return defaultURI.toString();

	}

	/**
	* Set the enablement state of the receiver.
	*
	* @param enabled
	*/
	private void setUserAreaEnabled(boolean enabled) {

	locationLabel.setEnabled(enabled);
	locationPathField.setEnabled(enabled);
	browseButton.setEnabled(enabled);
	if (fileSystemSelectionArea != null) {
	fileSystemSelectionArea.setEnabled(enabled);
	}
	}

	/**
	* Return the browse button. Usually referenced in order to set the layout
	* data for a dialog.
	*
	* @return Button
	*/
	public Button getBrowseButton() {
	return browseButton;
	}

	private IDialogSettings getDialogSettings() {
	IDialogSettings ideDialogSettings = IDEWorkbenchPlugin.getDefault().getDialogSettings();
	IDialogSettings result = ideDialogSettings.getSection(getClass().getName());
	if (result == null) {
	result = ideDialogSettings.addNewSection(getClass().getName());
	}
	return result;
	}

	/**
	* Open an appropriate directory browser
	*/
	private void handleLocationBrowseButtonPressed() {

	String selectedDirectory = null;
	String dirName = getPathFromLocationField();

	if (!dirName.equals(IDEResourceInfoUtils.EMPTY_STRING)) {
	IFileInfo info;
	info = IDEResourceInfoUtils.getFileInfo(dirName);

	if (info == null \|\| !(info.exists()))
	dirName = IDEResourceInfoUtils.EMPTY_STRING;
	} else {
	String value = getDialogSettings().get(SAVED_LOCATION_ATTR);
	if (value != null) {
	dirName = value;
	}
	}

	FileSystemConfiguration config = getSelectedConfiguration();
	if (config== null \|\| config.equals(
	FileSystemSupportRegistry.getInstance()
	.getDefaultConfiguration())) {
	DirectoryDialog dialog = new DirectoryDialog(locationPathField
	.getShell(), SWT.SHEET);
	dialog
	.setMessage(IDEWorkbenchMessages.ProjectLocationSelectionDialog_directoryLabel);

	dialog.setFilterPath(dirName);

	selectedDirectory = dialog.open();

	} else {
	URI uri = getSelectedConfiguration().getContributor()
	.browseFileSystem(dirName, browseButton.getShell());
	if (uri != null)
	selectedDirectory = uri.toString();
	}

	if (selectedDirectory != null) {
	updateLocationField(selectedDirectory);
	getDialogSettings().put(SAVED_LOCATION_ATTR, selectedDirectory);
	}
	}

	/**
	* Update the location field based on the selected path.
	*
	* @param selectedPath
	*/
	private void updateLocationField(String selectedPath) {
	locationPathField.setText(TextProcessor.process(selectedPath));
	}

	/**
	* Return the path on the location field.
	*
	* @return String
	*/
	private String getPathFromLocationField() {
	URI fieldURI;
	try {
	fieldURI = new URI(locationPathField.getText());
	} catch (URISyntaxException e) {
	return locationPathField.getText();
	}
	return fieldURI.getPath();
	}

	/**
	* Check if the entry in the widget location is valid. If it is valid return
	* null. Otherwise return a string that indicates the problem.
	*
	* @return String
	*/
	public String checkValidLocation() {

	String locationFieldContents = locationPathField.getText();
	if (locationFieldContents.length() == 0) {
	return IDEWorkbenchMessages.WizardNewProjectCreationPage_projectLocationEmpty;
	}

	URI newPath = getProjectLocationURI();
	if (newPath == null) {
	return IDEWorkbenchMessages.ProjectLocationSelectionDialog_locationError;
	}

	if (existingProject != null) {
	URI projectPath = existingProject.getLocationURI();
	if (projectPath != null && URIUtil.equals(projectPath, newPath)) {
	return IDEWorkbenchMessages.ProjectLocationSelectionDialog_locationIsSelf;
	}
	}

	if (!isDefault()) {
	IStatus locationStatus = ResourcesPlugin.getWorkspace()
	.validateProjectLocationURI(existingProject, newPath);

	if (!locationStatus.isOK()) {
	return locationStatus.getMessage();
	}
	}

	return null;
	}

	/**
	* Get the URI for the location field if possible.
	*
	* @return URI or <code>null</code> if it is not valid.
	*/
	public URI getProjectLocationURI() {

	FileSystemConfiguration configuration = getSelectedConfiguration();
	if (configuration == null) {
	return null;
	}

	return configuration.getContributor().getURI(
	locationPathField.getText());

	}

	/**
	* Return the selected contributor
	*
	* @return FileSystemConfiguration or <code>null</code> if it cannot be
	* determined.
	*/
	private FileSystemConfiguration getSelectedConfiguration() {
	if (fileSystemSelectionArea == null) {
	return FileSystemSupportRegistry.getInstance()
	.getDefaultConfiguration();
	}

	return fileSystemSelectionArea.getSelectedConfiguration();
	}

	/**
	* Set the text to the default or clear it if not using the defaults.
	*
	* @param newName
	* the name of the project to use. If <code>null</code> use the
	* existing project name.
	*/
	public void updateProjectName(String newName) {
	projectName = newName;
	if (isDefault()) {
	locationPathField.setText(TextProcessor
	.process(getDefaultPathDisplayString()));
	}

	}

	/**
	* Return the location for the project. If we are using defaults then return
	* the workspace root so that core creates it with default values.
	*
	* @return String
	*/
	public String getProjectLocation() {
	if (isDefault()) {
	return Platform.getLocation().toOSString();
	}
	return locationPathField.getText();
	}
	}