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

 /*******************************************************************************
  * Copyright (c) 2000, 2005 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
  *******************************************************************************/
 package org.eclipse.ui.dialogs;

 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.lang.reflect.InvocationTargetException;
 import java.util.Iterator;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IFolder;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceStatus;
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.OperationCanceledException;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Preferences;
 import org.eclipse.core.runtime.SubProgressMonitor;
 import org.eclipse.core.runtime.jobs.ISchedulingRule;
 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.wizard.WizardPage;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Point;
 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.Event;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.actions.WorkspaceModifyOperation;
 import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
 import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
 import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
 import org.eclipse.ui.internal.ide.dialogs.CreateLinkedResourceGroup;
 import org.eclipse.ui.internal.ide.misc.ResourceAndContainerGroup;

 /**
  * Standard main page for a wizard that creates a file resource.
  * <p>
  * This page may be used by clients as-is; it may be also be subclassed to suit.
  * </p>
  * <p>
  * Subclasses may override
  * <ul>
  *   <li><code>getInitialContents</code></li>
  *   <li><code>getNewFileLabel</code></li>
  * </ul>
  * </p>
  * <p>
  * Subclasses may extend
  * <ul>
  *   <li><code>handleEvent</code></li>
  * </ul>
  * </p>
  */
 public class WizardNewFileCreationPage extends WizardPage implements Listener {
     private static final int SIZING_CONTAINER_GROUP_HEIGHT = 250;

     // the current resource selection
     private IStructuredSelection currentSelection;

     // cache of newly-created file
     private IFile newFile;

     private IPath linkTargetPath;

     // widgets
     private ResourceAndContainerGroup resourceGroup;

     private Button advancedButton;

     private CreateLinkedResourceGroup linkedResourceGroup;

     private Composite linkedResourceParent;

     private Composite linkedResourceComposite;

     // initial value stores
     private String initialFileName;

     private IPath initialContainerFullPath;

     /**
      * Height of the "advanced" linked resource group. Set when the
      * advanced group is first made visible.
      */
     private int linkedResourceGroupHeight = -1;

     /**
      * First time the advanced group is validated.
      */
     private boolean firstLinkCheck = true;

     /**
      * Creates a new file creation wizard page. If the initial resource selection
      * contains exactly one container resource then it will be used as the default
      * container resource.
      *
      * @param pageName the name of the page
      * @param selection the current resource selection
      */
     public WizardNewFileCreationPage(String pageName,
             IStructuredSelection selection) {
         super(pageName);
         setPageComplete(false);
         this.currentSelection = selection;
     }

     /**
      * 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) {
             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.showAdvanced);
             GridData data = setButtonLayoutData(advancedButton);
             data.horizontalAlignment = GridData.BEGINNING;
             advancedButton.setLayoutData(data);
             advancedButton.addSelectionListener(new SelectionAdapter() {
                 public void widgetSelected(SelectionEvent e) {
                     handleAdvancedButtonSelect();
                 }
             });
         }
         linkedResourceGroup = new CreateLinkedResourceGroup(IResource.FILE,
                 new Listener() {
                     public void handleEvent(Event e) {
                         setPageComplete(validatePage());
                         firstLinkCheck = false;
                     }
                 },
                 new CreateLinkedResourceGroup.IStringValue(){
 					public void setValue(String string) {
 						resourceGroup.setResource(string);
 					}
 					public String getValue() {
 						return resourceGroup.getResource();
 					}
                 });
     }

     /** (non-Javadoc)
      * Method declared on IDialogPage.
      */
     public void createControl(Composite parent) {
         initializeDialogUnits(parent);
         // top level group
         Composite topLevel = new Composite(parent, SWT.NONE);
         topLevel.setLayout(new GridLayout());
         topLevel.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL
                 | GridData.HORIZONTAL_ALIGN_FILL));
         topLevel.setFont(parent.getFont());
         PlatformUI.getWorkbench().getHelpSystem().setHelp(topLevel,
 				IIDEHelpContextIds.NEW_FILE_WIZARD_PAGE);

         // resource and container group
         resourceGroup = new ResourceAndContainerGroup(
                 topLevel,
                 this,
                 getNewFileLabel(),
                 IDEWorkbenchMessages.WizardNewFileCreationPage_file, false, SIZING_CONTAINER_GROUP_HEIGHT);
         resourceGroup.setAllowExistingResources(false);
         initialPopulateContainerNameField();
         createAdvancedControls(topLevel);
         if (initialFileName != null)
             resourceGroup.setResource(initialFileName);
         validatePage();
         // Show description on opening
         setErrorMessage(null);
         setMessage(null);
         setControl(topLevel);
     }

     /**
      * Creates a file resource given the file handle and contents.
      *
      * @param fileHandle the file handle to create a file resource with
      * @param contents the initial contents of the new file resource, or
      *   <code>null</code> if none (equivalent to an empty stream)
      * @param monitor the progress monitor to show visual progress with
      * @exception CoreException if the operation fails
      * @exception OperationCanceledException if the operation is canceled
      */
     protected void createFile(IFile fileHandle, InputStream contents,
             IProgressMonitor monitor) throws CoreException {
         if (contents == null)
             contents = new ByteArrayInputStream(new byte[0]);

         try {
             // Create a new file resource in the workspace
             if (linkTargetPath != null)
                 fileHandle.createLink(linkTargetPath,
                         IResource.ALLOW_MISSING_LOCAL, monitor);
             else {
                 IPath path = fileHandle.getFullPath();
                 IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
                 int numSegments= path.segmentCount();
                 if (numSegments > 2 && !root.getFolder(path.removeLastSegments(1)).exists()) {
                     // If the direct parent of the path doesn't exist, try to create the
                     // necessary directories.
                     for (int i= numSegments - 2; i > 0; i--) {
                         IFolder folder = root.getFolder(path.removeLastSegments(i));
                         if (!folder.exists()) {
                             folder.create(false, true, monitor);
                         }
                     }
                 }
                 fileHandle.create(contents, false, monitor);
             }
         } catch (CoreException e) {
             // If the file already existed locally, just refresh to get contents
             if (e.getStatus().getCode() == IResourceStatus.PATH_OCCUPIED)
                 fileHandle.refreshLocal(IResource.DEPTH_ZERO, null);
             else
                 throw e;
         }

         if (monitor.isCanceled())
             throw new OperationCanceledException();
     }

     /**
      * Creates a file resource handle for the file with the given workspace path.
      * This method does not create the file resource; this is the responsibility
      * of <code>createFile</code>.
      *
      * @param filePath the path of the file resource to create a handle for
      * @return the new file resource handle
      * @see #createFile
      */
     protected IFile createFileHandle(IPath filePath) {
         return IDEWorkbenchPlugin.getPluginWorkspace().getRoot().getFile(
                 filePath);
     }

     /**
      * Creates the link target path if a link target has been specified.
      */
     protected void createLinkTarget() {
         String linkTarget = linkedResourceGroup.getLinkTarget();
         if (linkTarget != null) {
             linkTargetPath = new Path(linkTarget);
         } else {
             linkTargetPath = null;
         }
     }

     /**
      * Creates a new file resource in the selected container and with the selected
      * name. Creates any missing resource containers along the path; does nothing if
      * the container resources already exist.
      * <p>
      * In normal usage, this method is invoked after the user has pressed Finish on
      * the wizard; the enablement of the Finish button implies that all controls on
      * on this page currently contain valid values.
      * </p>
      * <p>
      * Note that this page caches the new file once it has been successfully
      * created; subsequent invocations of this method will answer the same
      * file resource without attempting to create it again.
      * </p>
      * <p>
      * This method should be called within a workspace modify operation since
      * it creates resources.
      * </p>
      *
      * @return the created file resource, or <code>null</code> if the file
      *    was not created
      */
     public IFile createNewFile() {
         if (newFile != null)
             return newFile;

         // create the new file and cache it if successful

         final IPath containerPath = resourceGroup.getContainerFullPath();
         IPath newFilePath = containerPath.append(resourceGroup.getResource());
         final IFile newFileHandle = createFileHandle(newFilePath);
         final InputStream initialContents = getInitialContents();

         createLinkTarget();
         WorkspaceModifyOperation op = new WorkspaceModifyOperation(createRule(newFileHandle)) {
             protected void execute(IProgressMonitor monitor)
                     throws CoreException {
                 try {
                     monitor.beginTask(IDEWorkbenchMessages.WizardNewFileCreationPage_progress, 2000);
                     ContainerGenerator generator = new ContainerGenerator(
                             containerPath);
                     generator.generateContainer(new SubProgressMonitor(monitor,
                             1000));
                     createFile(newFileHandle, initialContents,
                             new SubProgressMonitor(monitor, 1000));
                 } finally {
                     monitor.done();
                 }
             }
         };

         try {
             getContainer().run(true, true, op);
         } catch (InterruptedException e) {
             return null;
         } catch (InvocationTargetException e) {
             if (e.getTargetException() instanceof CoreException) {
                 ErrorDialog
                         .openError(
                                 getContainer().getShell(), // Was Utilities.getFocusShell()
                                 IDEWorkbenchMessages.WizardNewFileCreationPage_errorTitle,
                                 null, // no special message
                                 ((CoreException) e.getTargetException())
                                         .getStatus());
             } else {
                 // CoreExceptions are handled above, but unexpected runtime exceptions and errors may still occur.
                 IDEWorkbenchPlugin.log(getClass(),
                         "createNewFile()", e.getTargetException()); //$NON-NLS-1$
                 MessageDialog
                         .openError(
                                 getContainer().getShell(),
                                 IDEWorkbenchMessages.WizardNewFileCreationPage_internalErrorTitle, NLS.bind(IDEWorkbenchMessages.WizardNewFileCreationPage_internalErrorMessage, e.getTargetException().getMessage()));
             }
             return null;
         }

         newFile = newFileHandle;

         return newFile;
     }

     /**
      * Returns the scheduling rule to use when creating the resource at
      * the given container path. The rule should be the creation rule for
      * the top-most non-existing parent.
      * @param resource The resource being created
      * @return The scheduling rule for creating the given resource
      * @since 3.1
      */
     protected ISchedulingRule createRule(IResource resource) {
 		IResource parent = resource.getParent();
     	while (parent != null) {
     		if (parent.exists())
     			return resource.getWorkspace().getRuleFactory().createRule(resource);
     		resource = parent;
     		parent = parent.getParent();
     	}
 		return resource.getWorkspace().getRoot();
 	}

 	/**
      * Returns the current full path of the containing resource as entered or
      * selected by the user, or its anticipated initial value.
      *
      * @return the container's full path, anticipated initial value,
      *   or <code>null</code> if no path is known
      */
     public IPath getContainerFullPath() {
         return resourceGroup.getContainerFullPath();
     }

     /**
      * Returns the current file name as entered by the user, or its anticipated
      * initial value.
      *
      * @return the file name, its anticipated initial value, or <code>null</code>
      *   if no file name is known
      */
     public String getFileName() {
         if (resourceGroup == null)
             return initialFileName;

         return resourceGroup.getResource();
     }

     /**
      * Returns a stream containing the initial contents to be given to new file resource
      * instances.  <b>Subclasses</b> may wish to override.  This default implementation
      * provides no initial contents.
      *
      * @return initial contents to be given to new file resource instances
      */
     protected InputStream getInitialContents() {
         return null;
     }

     /**
      * Returns the label to display in the file name specification visual
      * component group.
      * <p>
      * Subclasses may reimplement.
      * </p>
      *
      * @return the label to display in the file name specification visual
      *     component group
      */
     protected String getNewFileLabel() {
         return IDEWorkbenchMessages.WizardNewFileCreationPage_fileLabel;
     }

     /**
      * Shows/hides the advanced option widgets.
      */
     protected void handleAdvancedButtonSelect() {
         Shell shell = getShell();
         Point shellSize = shell.getSize();
         Composite composite = (Composite) getControl();

         if (linkedResourceComposite != null) {
             linkedResourceComposite.dispose();
             linkedResourceComposite = null;
             composite.layout();
             shell.setSize(shellSize.x, shellSize.y - linkedResourceGroupHeight);
             advancedButton.setText(IDEWorkbenchMessages.showAdvanced);
         } else {
             linkedResourceComposite = linkedResourceGroup
                     .createContents(linkedResourceParent);
             if (linkedResourceGroupHeight == -1) {
                 Point groupSize = linkedResourceComposite.computeSize(
                         SWT.DEFAULT, SWT.DEFAULT, true);
                 linkedResourceGroupHeight = groupSize.y;
             }
             shell.setSize(shellSize.x, shellSize.y + linkedResourceGroupHeight);
             composite.layout();
             advancedButton.setText(IDEWorkbenchMessages.hideAdvanced);
         }
     }

     /**
      * The <code>WizardNewFileCreationPage</code> implementation of this
      * <code>Listener</code> method handles all events and enablements for controls
      * on this page. Subclasses may extend.
      */
     public void handleEvent(Event event) {
         setPageComplete(validatePage());
     }

     /**
      * Sets the initial contents of the container name entry field, based upon
      * either a previously-specified initial value or the ability to determine
      * such a value.
      */
     protected void initialPopulateContainerNameField() {
         if (initialContainerFullPath != null)
             resourceGroup.setContainerFullPath(initialContainerFullPath);
         else {
             Iterator it = currentSelection.iterator();
             if (it.hasNext()) {
                 Object object = it.next();
                 IResource selectedResource = null;
                 if (object instanceof IResource) {
                     selectedResource = (IResource) object;
                 } else if (object instanceof IAdaptable) {
                     selectedResource = (IResource) ((IAdaptable) object)
                             .getAdapter(IResource.class);
                 }
                 if (selectedResource != null) {
                     if (selectedResource.getType() == IResource.FILE)
                         selectedResource = selectedResource.getParent();
                     if (selectedResource.isAccessible())
                         resourceGroup.setContainerFullPath(selectedResource
                                 .getFullPath());
                 }
             }
         }
     }

     /**
      * Sets the value of this page's container name field, or stores
      * it for future use if this page's controls do not exist yet.
      *
      * @param path the full path to the container
      */
     public void setContainerFullPath(IPath path) {
         if (resourceGroup == null)
             initialContainerFullPath = path;
         else
             resourceGroup.setContainerFullPath(path);
     }

     /**
      * Sets the value of this page's file name field, or stores
      * it for future use if this page's controls do not exist yet.
      *
      * @param value new file name
      */
     public void setFileName(String value) {
         if (resourceGroup == null)
             initialFileName = value;
         else
             resourceGroup.setResource(value);
     }

     /**
      * Checks whether the linked resource target is valid.
      * Sets the error message accordingly and returns the status.
      *
      * @return IStatus validation result from the CreateLinkedResourceGroup
      */
     protected IStatus validateLinkedResource() {
         IPath containerPath = resourceGroup.getContainerFullPath();
         IPath newFilePath = containerPath.append(resourceGroup.getResource());
         IFile newFileHandle = createFileHandle(newFilePath);
         IStatus status = linkedResourceGroup
                 .validateLinkLocation(newFileHandle);

         if (status.getSeverity() == IStatus.ERROR) {
             if (firstLinkCheck)
                 setMessage(status.getMessage());
             else
                 setErrorMessage(status.getMessage());
         } else if (status.getSeverity() == IStatus.WARNING) {
             setMessage(status.getMessage(), WARNING);
             setErrorMessage(null);
         }
         return status;
     }

     /**
      * Returns whether this page's controls currently all contain valid
      * values.
      *
      * @return <code>true</code> if all controls are valid, and
      *   <code>false</code> if at least one is invalid
      */
     protected boolean validatePage() {
         boolean valid = true;

         if (!resourceGroup.areAllValuesValid()) {
             // if blank name then fail silently
             if (resourceGroup.getProblemType() == ResourceAndContainerGroup.PROBLEM_RESOURCE_EMPTY
                     || resourceGroup.getProblemType() == ResourceAndContainerGroup.PROBLEM_CONTAINER_EMPTY) {
                 setMessage(resourceGroup.getProblemMessage());
                 setErrorMessage(null);
             } else
                 setErrorMessage(resourceGroup.getProblemMessage());
             valid = false;
         }

         IStatus linkedResourceStatus = null;
         if (valid) {
             linkedResourceStatus = validateLinkedResource();
             if (linkedResourceStatus.getSeverity() == IStatus.ERROR)
                 valid = false;
         }
         // validateLinkedResource sets messages itself
         if (valid
                 && (linkedResourceStatus == null || linkedResourceStatus.isOK())) {
             setMessage(null);
             setErrorMessage(null);
         }
         return valid;
     }

     /*
      * @see DialogPage.setVisible(boolean)
      */
     public void setVisible(boolean visible) {
         super.setVisible(visible);
         if (visible)
             resourceGroup.setFocus();
     }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2005 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
	*******************************************************************************/
	package org.eclipse.ui.dialogs;

	import java.io.ByteArrayInputStream;
	import java.io.InputStream;
	import java.lang.reflect.InvocationTargetException;
	import java.util.Iterator;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IFolder;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IResourceStatus;
	import org.eclipse.core.resources.IWorkspaceRoot;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.OperationCanceledException;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Preferences;
	import org.eclipse.core.runtime.SubProgressMonitor;
	import org.eclipse.core.runtime.jobs.ISchedulingRule;
	import org.eclipse.jface.dialogs.ErrorDialog;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.wizard.WizardPage;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Point;
	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.Event;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.actions.WorkspaceModifyOperation;
	import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
	import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
	import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
	import org.eclipse.ui.internal.ide.dialogs.CreateLinkedResourceGroup;
	import org.eclipse.ui.internal.ide.misc.ResourceAndContainerGroup;

	/**
	* Standard main page for a wizard that creates a file resource.
	* <p>
	* This page may be used by clients as-is; it may be also be subclassed to suit.
	* </p>
	* <p>
	* Subclasses may override
	* <ul>
	* <li><code>getInitialContents</code></li>
	* <li><code>getNewFileLabel</code></li>
	* </ul>
	* </p>
	* <p>
	* Subclasses may extend
	* <ul>
	* <li><code>handleEvent</code></li>
	* </ul>
	* </p>
	*/
	public class WizardNewFileCreationPage extends WizardPage implements Listener {
	private static final int SIZING_CONTAINER_GROUP_HEIGHT = 250;

	// the current resource selection
	private IStructuredSelection currentSelection;

	// cache of newly-created file
	private IFile newFile;

	private IPath linkTargetPath;

	// widgets
	private ResourceAndContainerGroup resourceGroup;

	private Button advancedButton;

	private CreateLinkedResourceGroup linkedResourceGroup;

	private Composite linkedResourceParent;

	private Composite linkedResourceComposite;

	// initial value stores
	private String initialFileName;

	private IPath initialContainerFullPath;

	/**
	* Height of the "advanced" linked resource group. Set when the
	* advanced group is first made visible.
	*/
	private int linkedResourceGroupHeight = -1;

	/**
	* First time the advanced group is validated.
	*/
	private boolean firstLinkCheck = true;

	/**
	* Creates a new file creation wizard page. If the initial resource selection
	* contains exactly one container resource then it will be used as the default
	* container resource.
	*
	* @param pageName the name of the page
	* @param selection the current resource selection
	*/
	public WizardNewFileCreationPage(String pageName,
	IStructuredSelection selection) {
	super(pageName);
	setPageComplete(false);
	this.currentSelection = selection;
	}

	/**
	* 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) {
	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.showAdvanced);
	GridData data = setButtonLayoutData(advancedButton);
	data.horizontalAlignment = GridData.BEGINNING;
	advancedButton.setLayoutData(data);
	advancedButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	handleAdvancedButtonSelect();
	}
	});
	}
	linkedResourceGroup = new CreateLinkedResourceGroup(IResource.FILE,
	new Listener() {
	public void handleEvent(Event e) {
	setPageComplete(validatePage());
	firstLinkCheck = false;
	}
	},
	new CreateLinkedResourceGroup.IStringValue(){
	public void setValue(String string) {
	resourceGroup.setResource(string);
	}
	public String getValue() {
	return resourceGroup.getResource();
	}
	});
	}

	/** (non-Javadoc)
	* Method declared on IDialogPage.
	*/
	public void createControl(Composite parent) {
	initializeDialogUnits(parent);
	// top level group
	Composite topLevel = new Composite(parent, SWT.NONE);
	topLevel.setLayout(new GridLayout());
	topLevel.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL
	\| GridData.HORIZONTAL_ALIGN_FILL));
	topLevel.setFont(parent.getFont());
	PlatformUI.getWorkbench().getHelpSystem().setHelp(topLevel,
	IIDEHelpContextIds.NEW_FILE_WIZARD_PAGE);

	// resource and container group
	resourceGroup = new ResourceAndContainerGroup(
	topLevel,
	this,
	getNewFileLabel(),
	IDEWorkbenchMessages.WizardNewFileCreationPage_file, false, SIZING_CONTAINER_GROUP_HEIGHT);
	resourceGroup.setAllowExistingResources(false);
	initialPopulateContainerNameField();
	createAdvancedControls(topLevel);
	if (initialFileName != null)
	resourceGroup.setResource(initialFileName);
	validatePage();
	// Show description on opening
	setErrorMessage(null);
	setMessage(null);
	setControl(topLevel);
	}

	/**
	* Creates a file resource given the file handle and contents.
	*
	* @param fileHandle the file handle to create a file resource with
	* @param contents the initial contents of the new file resource, or
	* <code>null</code> if none (equivalent to an empty stream)
	* @param monitor the progress monitor to show visual progress with
	* @exception CoreException if the operation fails
	* @exception OperationCanceledException if the operation is canceled
	*/
	protected void createFile(IFile fileHandle, InputStream contents,
	IProgressMonitor monitor) throws CoreException {
	if (contents == null)
	contents = new ByteArrayInputStream(new byte[0]);

	try {
	// Create a new file resource in the workspace
	if (linkTargetPath != null)
	fileHandle.createLink(linkTargetPath,
	IResource.ALLOW_MISSING_LOCAL, monitor);
	else {
	IPath path = fileHandle.getFullPath();
	IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
	int numSegments= path.segmentCount();
	if (numSegments > 2 && !root.getFolder(path.removeLastSegments(1)).exists()) {
	// If the direct parent of the path doesn't exist, try to create the
	// necessary directories.
	for (int i= numSegments - 2; i > 0; i--) {
	IFolder folder = root.getFolder(path.removeLastSegments(i));
	if (!folder.exists()) {
	folder.create(false, true, monitor);
	}
	}
	}
	fileHandle.create(contents, false, monitor);
	}
	} catch (CoreException e) {
	// If the file already existed locally, just refresh to get contents
	if (e.getStatus().getCode() == IResourceStatus.PATH_OCCUPIED)
	fileHandle.refreshLocal(IResource.DEPTH_ZERO, null);
	else
	throw e;
	}

	if (monitor.isCanceled())
	throw new OperationCanceledException();
	}

	/**
	* Creates a file resource handle for the file with the given workspace path.
	* This method does not create the file resource; this is the responsibility
	* of <code>createFile</code>.
	*
	* @param filePath the path of the file resource to create a handle for
	* @return the new file resource handle
	* @see #createFile
	*/
	protected IFile createFileHandle(IPath filePath) {
	return IDEWorkbenchPlugin.getPluginWorkspace().getRoot().getFile(
	filePath);
	}

	/**
	* Creates the link target path if a link target has been specified.
	*/
	protected void createLinkTarget() {
	String linkTarget = linkedResourceGroup.getLinkTarget();
	if (linkTarget != null) {
	linkTargetPath = new Path(linkTarget);
	} else {
	linkTargetPath = null;
	}
	}

	/**
	* Creates a new file resource in the selected container and with the selected
	* name. Creates any missing resource containers along the path; does nothing if
	* the container resources already exist.
	* <p>
	* In normal usage, this method is invoked after the user has pressed Finish on
	* the wizard; the enablement of the Finish button implies that all controls on
	* on this page currently contain valid values.
	* </p>
	* <p>
	* Note that this page caches the new file once it has been successfully
	* created; subsequent invocations of this method will answer the same
	* file resource without attempting to create it again.
	* </p>
	* <p>
	* This method should be called within a workspace modify operation since
	* it creates resources.
	* </p>
	*
	* @return the created file resource, or <code>null</code> if the file
	* was not created
	*/
	public IFile createNewFile() {
	if (newFile != null)
	return newFile;

	// create the new file and cache it if successful

	final IPath containerPath = resourceGroup.getContainerFullPath();
	IPath newFilePath = containerPath.append(resourceGroup.getResource());
	final IFile newFileHandle = createFileHandle(newFilePath);
	final InputStream initialContents = getInitialContents();

	createLinkTarget();
	WorkspaceModifyOperation op = new WorkspaceModifyOperation(createRule(newFileHandle)) {
	protected void execute(IProgressMonitor monitor)
	throws CoreException {
	try {
	monitor.beginTask(IDEWorkbenchMessages.WizardNewFileCreationPage_progress, 2000);
	ContainerGenerator generator = new ContainerGenerator(
	containerPath);
	generator.generateContainer(new SubProgressMonitor(monitor,
	1000));
	createFile(newFileHandle, initialContents,
	new SubProgressMonitor(monitor, 1000));
	} finally {
	monitor.done();
	}
	}
	};

	try {
	getContainer().run(true, true, op);
	} catch (InterruptedException e) {
	return null;
	} catch (InvocationTargetException e) {
	if (e.getTargetException() instanceof CoreException) {
	ErrorDialog
	.openError(
	getContainer().getShell(), // Was Utilities.getFocusShell()
	IDEWorkbenchMessages.WizardNewFileCreationPage_errorTitle,
	null, // no special message
	((CoreException) e.getTargetException())
	.getStatus());
	} else {
	// CoreExceptions are handled above, but unexpected runtime exceptions and errors may still occur.
	IDEWorkbenchPlugin.log(getClass(),
	"createNewFile()", e.getTargetException()); //$NON-NLS-1$
	MessageDialog
	.openError(
	getContainer().getShell(),
	IDEWorkbenchMessages.WizardNewFileCreationPage_internalErrorTitle, NLS.bind(IDEWorkbenchMessages.WizardNewFileCreationPage_internalErrorMessage, e.getTargetException().getMessage()));
	}
	return null;
	}

	newFile = newFileHandle;

	return newFile;
	}

	/**
	* Returns the scheduling rule to use when creating the resource at
	* the given container path. The rule should be the creation rule for
	* the top-most non-existing parent.
	* @param resource The resource being created
	* @return The scheduling rule for creating the given resource
	* @since 3.1
	*/
	protected ISchedulingRule createRule(IResource resource) {
	IResource parent = resource.getParent();
	while (parent != null) {
	if (parent.exists())
	return resource.getWorkspace().getRuleFactory().createRule(resource);
	resource = parent;
	parent = parent.getParent();
	}
	return resource.getWorkspace().getRoot();
	}

	/**
	* Returns the current full path of the containing resource as entered or
	* selected by the user, or its anticipated initial value.
	*
	* @return the container's full path, anticipated initial value,
	* or <code>null</code> if no path is known
	*/
	public IPath getContainerFullPath() {
	return resourceGroup.getContainerFullPath();
	}

	/**
	* Returns the current file name as entered by the user, or its anticipated
	* initial value.
	*
	* @return the file name, its anticipated initial value, or <code>null</code>
	* if no file name is known
	*/
	public String getFileName() {
	if (resourceGroup == null)
	return initialFileName;

	return resourceGroup.getResource();
	}

	/**
	* Returns a stream containing the initial contents to be given to new file resource
	* instances. <b>Subclasses</b> may wish to override. This default implementation
	* provides no initial contents.
	*
	* @return initial contents to be given to new file resource instances
	*/
	protected InputStream getInitialContents() {
	return null;
	}

	/**
	* Returns the label to display in the file name specification visual
	* component group.
	* <p>
	* Subclasses may reimplement.
	* </p>
	*
	* @return the label to display in the file name specification visual
	* component group
	*/
	protected String getNewFileLabel() {
	return IDEWorkbenchMessages.WizardNewFileCreationPage_fileLabel;
	}

	/**
	* Shows/hides the advanced option widgets.
	*/
	protected void handleAdvancedButtonSelect() {
	Shell shell = getShell();
	Point shellSize = shell.getSize();
	Composite composite = (Composite) getControl();

	if (linkedResourceComposite != null) {
	linkedResourceComposite.dispose();
	linkedResourceComposite = null;
	composite.layout();
	shell.setSize(shellSize.x, shellSize.y - linkedResourceGroupHeight);
	advancedButton.setText(IDEWorkbenchMessages.showAdvanced);
	} else {
	linkedResourceComposite = linkedResourceGroup
	.createContents(linkedResourceParent);
	if (linkedResourceGroupHeight == -1) {
	Point groupSize = linkedResourceComposite.computeSize(
	SWT.DEFAULT, SWT.DEFAULT, true);
	linkedResourceGroupHeight = groupSize.y;
	}
	shell.setSize(shellSize.x, shellSize.y + linkedResourceGroupHeight);
	composite.layout();
	advancedButton.setText(IDEWorkbenchMessages.hideAdvanced);
	}
	}

	/**
	* The <code>WizardNewFileCreationPage</code> implementation of this
	* <code>Listener</code> method handles all events and enablements for controls
	* on this page. Subclasses may extend.
	*/
	public void handleEvent(Event event) {
	setPageComplete(validatePage());
	}

	/**
	* Sets the initial contents of the container name entry field, based upon
	* either a previously-specified initial value or the ability to determine
	* such a value.
	*/
	protected void initialPopulateContainerNameField() {
	if (initialContainerFullPath != null)
	resourceGroup.setContainerFullPath(initialContainerFullPath);
	else {
	Iterator it = currentSelection.iterator();
	if (it.hasNext()) {
	Object object = it.next();
	IResource selectedResource = null;
	if (object instanceof IResource) {
	selectedResource = (IResource) object;
	} else if (object instanceof IAdaptable) {
	selectedResource = (IResource) ((IAdaptable) object)
	.getAdapter(IResource.class);
	}
	if (selectedResource != null) {
	if (selectedResource.getType() == IResource.FILE)
	selectedResource = selectedResource.getParent();
	if (selectedResource.isAccessible())
	resourceGroup.setContainerFullPath(selectedResource
	.getFullPath());
	}
	}
	}
	}

	/**
	* Sets the value of this page's container name field, or stores
	* it for future use if this page's controls do not exist yet.
	*
	* @param path the full path to the container
	*/
	public void setContainerFullPath(IPath path) {
	if (resourceGroup == null)
	initialContainerFullPath = path;
	else
	resourceGroup.setContainerFullPath(path);
	}

	/**
	* Sets the value of this page's file name field, or stores
	* it for future use if this page's controls do not exist yet.
	*
	* @param value new file name
	*/
	public void setFileName(String value) {
	if (resourceGroup == null)
	initialFileName = value;
	else
	resourceGroup.setResource(value);
	}

	/**
	* Checks whether the linked resource target is valid.
	* Sets the error message accordingly and returns the status.
	*
	* @return IStatus validation result from the CreateLinkedResourceGroup
	*/
	protected IStatus validateLinkedResource() {
	IPath containerPath = resourceGroup.getContainerFullPath();
	IPath newFilePath = containerPath.append(resourceGroup.getResource());
	IFile newFileHandle = createFileHandle(newFilePath);
	IStatus status = linkedResourceGroup
	.validateLinkLocation(newFileHandle);

	if (status.getSeverity() == IStatus.ERROR) {
	if (firstLinkCheck)
	setMessage(status.getMessage());
	else
	setErrorMessage(status.getMessage());
	} else if (status.getSeverity() == IStatus.WARNING) {
	setMessage(status.getMessage(), WARNING);
	setErrorMessage(null);
	}
	return status;
	}

	/**
	* Returns whether this page's controls currently all contain valid
	* values.
	*
	* @return <code>true</code> if all controls are valid, and
	* <code>false</code> if at least one is invalid
	*/
	protected boolean validatePage() {
	boolean valid = true;

	if (!resourceGroup.areAllValuesValid()) {
	// if blank name then fail silently
	if (resourceGroup.getProblemType() == ResourceAndContainerGroup.PROBLEM_RESOURCE_EMPTY
	\|\| resourceGroup.getProblemType() == ResourceAndContainerGroup.PROBLEM_CONTAINER_EMPTY) {
	setMessage(resourceGroup.getProblemMessage());
	setErrorMessage(null);
	} else
	setErrorMessage(resourceGroup.getProblemMessage());
	valid = false;
	}

	IStatus linkedResourceStatus = null;
	if (valid) {
	linkedResourceStatus = validateLinkedResource();
	if (linkedResourceStatus.getSeverity() == IStatus.ERROR)
	valid = false;
	}
	// validateLinkedResource sets messages itself
	if (valid
	&& (linkedResourceStatus == null \|\| linkedResourceStatus.isOK())) {
	setMessage(null);
	setErrorMessage(null);
	}
	return valid;
	}

	/*
	* @see DialogPage.setVisible(boolean)
	*/
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible)
	resourceGroup.setFocus();
	}
	}