/*******************************************************************************
 * Copyright (c) 2001, 2004 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.wst.xml.ui.internal.wizards;

import java.text.Collator;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.util.Assert;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.IWizardPage;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IEditorDescriptor;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.PageBook;
import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;
import org.eclipse.wst.common.uriresolver.internal.util.URIHelper;
import org.eclipse.wst.xml.core.internal.catalog.provisional.ICatalogEntry;
import org.eclipse.wst.xml.core.internal.contentmodel.CMDocument;
import org.eclipse.wst.xml.core.internal.contentmodel.CMElementDeclaration;
import org.eclipse.wst.xml.core.internal.contentmodel.CMNamedNodeMap;
import org.eclipse.wst.xml.core.internal.contentmodel.util.DOMContentBuilder;
import org.eclipse.wst.xml.core.internal.contentmodel.util.NamespaceInfo;
import org.eclipse.wst.xml.ui.internal.Logger;
import org.eclipse.wst.xml.ui.internal.dialogs.NamespaceInfoErrorHelper;
import org.eclipse.wst.xml.ui.internal.dialogs.SelectFileOrXMLCatalogIdPanel;
import org.eclipse.wst.xml.ui.internal.nsedit.CommonEditNamespacesDialog;

public class NewXMLWizard extends NewModelWizard {
	protected static final int CREATE_FROM_DTD = 0;
	protected static final int CREATE_FROM_XSD = 1;
	protected static final int CREATE_FROM_SCRATCH = 2;

	protected static final String[] createFromRadioButtonLabel = {XMLWizardsMessages._UI_RADIO_XML_FROM_DTD, XMLWizardsMessages._UI_RADIO_XML_FROM_SCHEMA, XMLWizardsMessages._UI_RADIO_XML_FROM_SCRATCH};

	protected static final String[] filePageFilterExtensions = {".xml"}; //$NON-NLS-1$
	protected static final String[] browseXSDFilterExtensions = {".xsd"}; //$NON-NLS-1$
	protected static final String[] browseDTDFilterExtensions = {".dtd"}; //$NON-NLS-1$

	protected NewFilePage newFilePage;
	protected StartPage startPage;
	protected SelectGrammarFilePage selectGrammarFilePage;
	protected SelectRootElementPage selectRootElementPage;

	protected String cmDocumentErrorMessage;

	protected NewXMLGenerator generator;


	public NewXMLWizard() {
		setWindowTitle(XMLWizardsMessages._UI_WIZARD_CREATE_XML_HEADING);
		setDefaultPageImageDescriptor(ImageDescriptor.createFromFile(XMLWizard.class, "icons/generatexml_wiz.gif")); //$NON-NLS-1$
		generator = new NewXMLGenerator();
	}


	public NewXMLWizard(IFile file, CMDocument cmDocument) {
		this();

		generator.setGrammarURI(URIHelper.getPlatformURI(file));
		generator.setCMDocument(cmDocument);
	}


	public static void showDialog(Shell shell, IFile file, IStructuredSelection structuredSelection) {
		String[] errorInfo = new String[2];
		CMDocument cmDocument = NewXMLGenerator.createCMDocument(file.getLocation().toOSString(), errorInfo);
		if (errorInfo[0] == null) {
			NewXMLWizard wizard = new NewXMLWizard(file, cmDocument);
			wizard.init(PlatformUI.getWorkbench(), structuredSelection);
			wizard.setNeedsProgressMonitor(true);
			WizardDialog dialog = new WizardDialog(shell, wizard);
			dialog.create();
			dialog.getShell().setText(XMLWizardsMessages._UI_DIALOG_NEW_TITLE);
			dialog.setBlockOnOpen(true);
			dialog.open();
		}
		else {
			MessageDialog.openInformation(shell, errorInfo[0], errorInfo[1]);
		}
	}


	public void addPages() {
		String grammarURI = generator.getGrammarURI();

		if (grammarURI == null) {
			// start page
			startPage = new StartPage("StartPage", createFromRadioButtonLabel) //$NON-NLS-1$
			{
				public void createControl(Composite parent) {
					super.createControl(parent);
				}

				public void setVisible(boolean visible) {
					super.setVisible(visible);
					getRadioButtonAtIndex(getCreateMode()).setSelection(true);
					getRadioButtonAtIndex(getCreateMode()).setFocus();

					// Set the help context for each button
					PlatformUI.getWorkbench().getHelpSystem().setHelp(startPage.getRadioButtonAtIndex(0), IXMLWizardHelpContextIds.XML_NEWWIZARD_CREATEXML1_HELPID);
					PlatformUI.getWorkbench().getHelpSystem().setHelp(startPage.getRadioButtonAtIndex(1), IXMLWizardHelpContextIds.XML_NEWWIZARD_CREATEXML2_HELPID);
					PlatformUI.getWorkbench().getHelpSystem().setHelp(startPage.getRadioButtonAtIndex(2), IXMLWizardHelpContextIds.XML_NEWWIZARD_CREATEXML3_HELPID);
				}
			};


			startPage.setTitle(XMLWizardsMessages._UI_WIZARD_CREATE_XML_HEADING);
			startPage.setDescription(XMLWizardsMessages._UI_WIZARD_CREATE_XML_EXPL);
			addPage(startPage);
		}

		// new file page
		newFilePage = new NewFilePage(fSelection);
		newFilePage.setTitle(XMLWizardsMessages._UI_WIZARD_CREATE_XML_FILE_HEADING);
		newFilePage.setDescription(XMLWizardsMessages._UI_WIZARD_CREATE_XML_FILE_EXPL);
		newFilePage.defaultName = (grammarURI != null) ? URIHelper.removeFileExtension(URIHelper.getLastSegment(grammarURI)) : "NewFile"; //$NON-NLS-1$
		newFilePage.defaultFileExtension = ".xml"; //$NON-NLS-1$
		newFilePage.filterExtensions = filePageFilterExtensions;
		addPage(newFilePage);

		// selectGrammarFilePage
		selectGrammarFilePage = new SelectGrammarFilePage();
		addPage(selectGrammarFilePage);

		// select root element page
		selectRootElementPage = new SelectRootElementPage();
		selectRootElementPage.setTitle(XMLWizardsMessages._UI_WIZARD_SELECT_ROOT_HEADING);
		selectRootElementPage.setDescription(XMLWizardsMessages._UI_WIZARD_SELECT_ROOT_EXPL);
		addPage(selectRootElementPage);
	}


	public IWizardPage getStartingPage() {
		WizardPage result = null;
		if (startPage != null) {
			result = startPage;
		}
		else {
			result = newFilePage;
		}
		return result;
	}


	public int getCreateMode() {
		String grammarURI = generator.getGrammarURI();

		int result = CREATE_FROM_SCRATCH;
		if (grammarURI != null) {
			if (grammarURI.endsWith(".dtd")) //$NON-NLS-1$
			{
				result = CREATE_FROM_DTD;
			}
			else if (grammarURI.endsWith(".xsd")) //$NON-NLS-1$
			{
				result = CREATE_FROM_XSD;
			}
		}
		else if (startPage != null) {
			int selectedIndex = startPage.getSelectedRadioButtonIndex();
			if (selectedIndex != -1) {
				result = selectedIndex;
			}
		}
		return result;
	}


	public IWizardPage getNextPage(IWizardPage currentPage) {
		WizardPage nextPage = null;
		if (currentPage == startPage) {
			nextPage = newFilePage;
		}
		else if (currentPage == newFilePage) {
			if (getCreateMode() == CREATE_FROM_SCRATCH) {
				nextPage = null;
			}
			else if (generator.getGrammarURI() == null) {
				nextPage = selectGrammarFilePage;
			}
			else {
				nextPage = selectRootElementPage;
			}
		}
		else if (currentPage == selectGrammarFilePage) {
			nextPage = selectRootElementPage;
		}
		return nextPage;
	}


	public boolean canFinish() {
		boolean result = false;

		IWizardPage currentPage = getContainer().getCurrentPage();

		if ((startPage != null && startPage.getSelectedRadioButtonIndex() == CREATE_FROM_SCRATCH && currentPage == newFilePage) || (currentPage == selectRootElementPage)) {
			result = currentPage.isPageComplete();
		}
		return result;
	}


	public boolean performFinish() {
		boolean result = true;
		super.performFinish();
		String fileName = null;
		try {

			String[] namespaceErrors = generator.getNamespaceInfoErrors();
			if (namespaceErrors != null) {
				String title = namespaceErrors[0];
				String message = namespaceErrors[1];
				result = MessageDialog.openQuestion(getShell(), title, message);
			}

			if (result) {
				fileName = newFilePage.getFileName();
				if ((new Path(fileName)).getFileExtension() == null) {
					newFilePage.setFileName(fileName.concat(".xml")); //$NON-NLS-1$
				}

				IFile newFile = newFilePage.createNewFile();
				String xmlFileName = newFile.getLocation().toOSString();

				if (getContainer().getCurrentPage() == selectRootElementPage) {

					generator.createXMLDocument(newFile, xmlFileName);
				}
				else {
					generator.createEmptyXMLDocument(newFile);
				}

				newFile.refreshLocal(1, null);

				IWorkbenchWindow workbenchWindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
				BasicNewResourceWizard.selectAndReveal(newFile, workbenchWindow);
				openEditor(newFile);
			}
		}
		catch (Exception e) {
			Logger.logException("Exception completing New XML wizard " + fileName, e); //$NON-NLS-1$
		}
		return result;
	}

	public void openEditor(IFile file) {
		// Open editor on new file.
		String editorId = null;
		try {
			IEditorDescriptor editor = PlatformUI.getWorkbench().getEditorRegistry().getDefaultEditor(file.getLocation().toOSString(), file.getContentDescription().getContentType());
			if (editor != null) {
				editorId = editor.getId();
			}
		}
		catch (CoreException e1) {
			// editor id could not be retrieved, so we can not open editor
			return;
		}
		IWorkbenchWindow dw = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
		try {
			if (dw != null) {
				IWorkbenchPage page = dw.getActivePage();
				if (page != null)
					page.openEditor(new FileEditorInput(file), editorId, true);
			}
		}
		catch (PartInitException e) {
			// editor can not open for some reason
			return;
		}

	}


	protected String getDefaultSystemId() {
		String relativePath = "platform:/resource/" + newFilePage.getContainerFullPath().toString() + "/dummy"; //$NON-NLS-1$ //$NON-NLS-2$
		return URIHelper.getRelativeURI(generator.getGrammarURI(), relativePath);
	}


	/**
	 * SelectGrammarFilePage
	 */
	class SelectGrammarFilePage extends WizardPage {
		protected SelectFileOrXMLCatalogIdPanel panel;

		SelectGrammarFilePage() {
			super("SelectGrammarFilePage"); //$NON-NLS-1$
		}

		public void createControl(Composite parent) {
			Composite composite = new Composite(parent, SWT.NONE);
			PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTSOURCE_HELPID);
			composite.setLayout(new GridLayout());
			composite.setLayoutData(new GridData(GridData.FILL_BOTH));
			setControl(composite);

			panel = new SelectFileOrXMLCatalogIdPanel(composite);
			panel.setLayoutData(new GridData(GridData.FILL_BOTH));

			SelectFileOrXMLCatalogIdPanel.Listener listener = new SelectFileOrXMLCatalogIdPanel.Listener() {
				public void completionStateChanged() {
					updateErrorMessage();
				}
			};
			panel.setListener(listener);
		}

		public void setVisible(boolean visible) {
			super.setVisible(visible);
			if (visible) {
				if (getCreateMode() == CREATE_FROM_DTD) {
					setTitle(XMLWizardsMessages._UI_WIZARD_SELECT_DTD_FILE_TITLE);
					setDescription(XMLWizardsMessages._UI_WIZARD_SELECT_DTD_FILE_DESC);
					panel.setFilterExtensions(browseDTDFilterExtensions);
				}
				else {
					setTitle(XMLWizardsMessages._UI_WIZARD_SELECT_XSD_FILE_TITLE);
					setDescription(XMLWizardsMessages._UI_WIZARD_SELECT_XSD_FILE_DESC);
					panel.setFilterExtensions(browseXSDFilterExtensions);
				}
				generator.setGrammarURI(null);
				generator.setCMDocument(null);
				cmDocumentErrorMessage = null;
			}
			panel.setVisibleHelper(visible);
		}

		public String getURI() {
			String uri = panel.getXMLCatalogURI();
			if (uri == null) {
				IFile file = panel.getFile();
				if (file != null) {
					uri = URIHelper.getPlatformURI(file);
				}
			}
			return uri;
		}

		public boolean isPageComplete() {
			return getURI() != null && getErrorMessage() == null;
		}

		public String getXMLCatalogId() {
			return panel.getXMLCatalogId();
		}

		public ICatalogEntry getXMLCatalogEntry() {
			return panel.getXMLCatalogEntry();
		}

		public String computeErrorMessage() {
			String errorMessage = null;
			String uri = getURI();
			if (uri != null) {
				if (!URIHelper.isReadableURI(uri, false)) {
					errorMessage = XMLWizardsMessages._UI_LABEL_ERROR_CATALOG_ENTRY_INVALID;
				}
			}
			return errorMessage;
		}


		public void updateErrorMessage() {
			String errorMessage = computeErrorMessage();
			setErrorMessage(errorMessage);
			setPageComplete(isPageComplete());
		}
	}


	/**
	 * SelectRootElementPage
	 */
	class SelectRootElementPage extends WizardPage implements SelectionListener {
		protected Combo combo;
		protected Button[] radioButton;
		protected PageBook pageBook;
		protected XSDOptionsPanel xsdOptionsPanel;
		protected DTDOptionsPanel dtdOptionsPanel;


		SelectRootElementPage() {
			super("SelectRootElementPage"); //$NON-NLS-1$
		}

		public void createControl(Composite parent) {
			// container group
			Composite containerGroup = new Composite(parent, SWT.NONE);
			PlatformUI.getWorkbench().getHelpSystem().setHelp(containerGroup, IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT_HELPID);
			containerGroup.setLayout(new GridLayout());
			containerGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
			setControl(containerGroup);

			// select root element
			Label containerLabel = new Label(containerGroup, SWT.NONE);
			containerLabel.setText(XMLWizardsMessages._UI_LABEL_ROOT_ELEMENT);
			combo = new Combo(containerGroup, SWT.DROP_DOWN | SWT.READ_ONLY);
			combo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
			combo.addSelectionListener(this);

			// Options
			{
				Group group = new Group(containerGroup, SWT.NONE);
				group.setText(XMLWizardsMessages._UI_WIZARD_CONTENT_OPTIONS);

				GridLayout layout = new GridLayout();
				layout.numColumns = 1;
				layout.makeColumnsEqualWidth = true;
				layout.marginWidth = 0;
				group.setLayout(layout);
				group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

				radioButton = new Button[4];

				radioButton[0] = new Button(group, SWT.CHECK);
				radioButton[0].setText(XMLWizardsMessages._UI_WIZARD_CREATE_OPTIONAL_ATTRIBUTES);
				radioButton[0].setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
				radioButton[0].setSelection(false);
				PlatformUI.getWorkbench().getHelpSystem().setHelp(radioButton[0], IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT1_HELPID);

				radioButton[1] = new Button(group, SWT.CHECK);
				radioButton[1].setText(XMLWizardsMessages._UI_WIZARD_CREATE_OPTIONAL_ELEMENTS);
				radioButton[1].setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
				radioButton[1].setSelection(false);
				PlatformUI.getWorkbench().getHelpSystem().setHelp(radioButton[1], IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT2_HELPID);

				radioButton[2] = new Button(group, SWT.CHECK);
				radioButton[2].setText(XMLWizardsMessages._UI_WIZARD_CREATE_FIRST_CHOICE);
				radioButton[2].setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
				radioButton[2].setSelection(true);
				PlatformUI.getWorkbench().getHelpSystem().setHelp(radioButton[2], IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT3_HELPID);

				radioButton[3] = new Button(group, SWT.CHECK);
				radioButton[3].setText(XMLWizardsMessages._UI_WIZARD_FILL_ELEMENTS_AND_ATTRIBUTES);
				radioButton[3].setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
				radioButton[3].setSelection(true);
				PlatformUI.getWorkbench().getHelpSystem().setHelp(radioButton[3], IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT4_HELPID);
				/*
				 * radioButton = new Button[2];
				 * 
				 * radioButton[0] = new Button(group, SWT.RADIO);
				 * radioButton[0].setText(XMLWizardsMessages.getString("_UI_WIZARD_CREATE_REQUIRED"));
				 * radioButton[0].setLayoutData(new
				 * GridData(GridData.FILL_HORIZONTAL));
				 * radioButton[0].setSelection(true);
				 * WorkbenchHelp.setHelp(radioButton[0],
				 * XMLBuilderContextIds.XMLC_CREATE_REQUIRED_ONLY);
				 * 
				 * radioButton[1] = new Button(group, SWT.RADIO);
				 * radioButton[1].setText(XMLWizardsMessages.getString("_UI_WIZARD_CREATE_OPTIONAL"));
				 * radioButton[1].setLayoutData(new
				 * GridData(GridData.FILL_HORIZONTAL));
				 * WorkbenchHelp.setHelp(radioButton[1],
				 * XMLBuilderContextIds.XMLC_CREATE_REQUIRED_AND_OPTION);
				 */
			}

			// add the grammar specific generation options
			//
			{
				pageBook = new PageBook(containerGroup, SWT.NONE);
				pageBook.setLayoutData(new GridData(GridData.FILL_BOTH));
				xsdOptionsPanel = new XSDOptionsPanel(this, pageBook);
				dtdOptionsPanel = new DTDOptionsPanel(this, pageBook);
				pageBook.showPage(xsdOptionsPanel);
			}
		}

		public void widgetSelected(SelectionEvent event) {
			int index = combo.getSelectionIndex();
			String rootElementName = (index != -1) ? combo.getItem(index) : null;
			generator.setRootElementName(rootElementName);
		}

		public void widgetDefaultSelected(SelectionEvent event) {
			// do nothing
		}

		public void setVisible(boolean visible) {
			super.setVisible(visible);

			if (visible) {
				try {
					if (generator.getGrammarURI() == null) {
						generator.setGrammarURI(selectGrammarFilePage.getURI());
						generator.setXMLCatalogEntry(selectGrammarFilePage.getXMLCatalogEntry());
					}
					Assert.isNotNull(generator.getGrammarURI());

					if (generator.getCMDocument() == null) {
						final String[] errorInfo = new String[2];
						final CMDocument[] cmdocs = new CMDocument[1];
						Runnable r = new Runnable() {
							public void run() {
								cmdocs[0] = NewXMLGenerator.createCMDocument(generator.getGrammarURI(), errorInfo);
							}
						};
						org.eclipse.swt.custom.BusyIndicator.showWhile(Display.getCurrent(), r);

						generator.setCMDocument(cmdocs[0]);
						cmDocumentErrorMessage = errorInfo[1];
					}

					if (generator.getCMDocument() != null && cmDocumentErrorMessage == null) {
						CMNamedNodeMap nameNodeMap = generator.getCMDocument().getElements();
						Vector nameNodeVector = new Vector();

						for (int i = 0; i < nameNodeMap.getLength(); i++) {
							CMElementDeclaration cmElementDeclaration = (CMElementDeclaration) nameNodeMap.item(i);
							Object value = cmElementDeclaration.getProperty("Abstract"); //$NON-NLS-1$
							if (value != Boolean.TRUE) {
								nameNodeVector.add(cmElementDeclaration.getElementName());
							}
						}

						Object[] nameNodeArray = nameNodeVector.toArray();
						if (nameNodeArray.length > 0) {
							Arrays.sort(nameNodeArray, Collator.getInstance());
						}

						String defaultRootName = (String) (generator.getCMDocument()).getProperty("http://org.eclipse.wst/cm/properties/defaultRootName"); //$NON-NLS-1$
						int defaultRootIndex = -1;
						combo.removeAll();


						for (int i = 0; i < nameNodeArray.length; i++) {
							String elementName = (String) nameNodeArray[i];

							combo.add(elementName);
							if (defaultRootName != null && defaultRootName.equals(elementName)) {
								defaultRootIndex = i;
							}
						}

						if (nameNodeArray.length > 0) {
							defaultRootIndex = defaultRootIndex != -1 ? defaultRootIndex : 0;
							combo.select(defaultRootIndex);
							generator.setRootElementName(combo.getItem(defaultRootIndex));
						}
					}

					if (generator.getGrammarURI().endsWith("xsd")) //$NON-NLS-1$
					{
						pageBook.showPage(xsdOptionsPanel);
						generator.setDefaultSystemId(getDefaultSystemId());
						generator.createNamespaceInfoList();

						// Provide default namespace prefix if none
						for (int i = 0; i < generator.namespaceInfoList.size(); i++) {
							NamespaceInfo nsinfo = (NamespaceInfo) generator.namespaceInfoList.get(i);
							if ((nsinfo.prefix == null || nsinfo.prefix.trim().length() == 0) && (nsinfo.uri != null && nsinfo.uri.trim().length() != 0)) {
								nsinfo.prefix = getDefaultPrefix(generator.namespaceInfoList);
							}
						}
						xsdOptionsPanel.setNamespaceInfoList(generator.namespaceInfoList);
					}
					else if (generator.getGrammarURI().endsWith("dtd")) //$NON-NLS-1$
					{
						pageBook.showPage(dtdOptionsPanel);
						dtdOptionsPanel.update();
					}
				}
				catch (Exception e) {
					// XMLBuilderPlugin.getPlugin().getMsgLogger().writeCurrentThread();
				}

				/*
				 * String errorMessage = computeErrorMessage(); if
				 * (errorMessage == null) super.setVisible(visible);
				 */

				updateErrorMessage();
			}
		}

		private String getDefaultPrefix(List nsInfoList) {
			String defaultPrefix = "p"; //$NON-NLS-1$
			if (nsInfoList == null)
				return defaultPrefix;

			Vector v = new Vector();
			for (int i = 0; i < nsInfoList.size(); i++) {
				NamespaceInfo nsinfo = (NamespaceInfo) nsInfoList.get(i);
				if (nsinfo.prefix != null)
					v.addElement(nsinfo.prefix);
			}

			if (v.contains(defaultPrefix)) {
				String s = defaultPrefix;
				for (int j = 0; v.contains(s); j++) {
					s = defaultPrefix + Integer.toString(j);
				}
				return s;
			}
			return defaultPrefix;
		}

		public boolean isPageComplete() {
			boolean complete = (generator.getRootElementName() != null && generator.getRootElementName().length() > 0) && getErrorMessage() == null;

			if (complete) {
				/*
				 * int buildPolicy = radioButton[0].getSelection() ?
				 * DOMContentBuilder.BUILD_ONLY_REQUIRED_CONTENT :
				 * DOMContentBuilder.BUILD_ALL_CONTENT;
				 */
				int buildPolicy = 0;
				if (radioButton[0].getSelection())
					buildPolicy = buildPolicy | DOMContentBuilder.BUILD_OPTIONAL_ATTRIBUTES;
				if (radioButton[1].getSelection())
					buildPolicy = buildPolicy | DOMContentBuilder.BUILD_OPTIONAL_ELEMENTS;
				if (radioButton[2].getSelection())
					buildPolicy = buildPolicy | DOMContentBuilder.BUILD_FIRST_CHOICE | DOMContentBuilder.BUILD_FIRST_SUBSTITUTION;
				if (radioButton[3].getSelection())
					buildPolicy = buildPolicy | DOMContentBuilder.BUILD_TEXT_NODES;

				generator.setBuildPolicy(buildPolicy);
			}

			return complete;
		}

		public String computeErrorMessage() {
			String errorMessage = null;

			if (cmDocumentErrorMessage != null) {
				errorMessage = cmDocumentErrorMessage;
			}
			else if (generator.getRootElementName() == null || generator.getRootElementName().length() == 0) {
				errorMessage = XMLWizardsMessages._ERROR_ROOT_ELEMENT_MUST_BE_SPECIFIED;
			}

			return errorMessage;
		}


		public void updateErrorMessage() {
			String errorMessage = computeErrorMessage();
			if (errorMessage == null) {
				if (xsdOptionsPanel.isVisible()) {

					errorMessage = xsdOptionsPanel.computeErrorMessage();
				}
				else if (dtdOptionsPanel.isVisible()) {
					errorMessage = dtdOptionsPanel.computeErrorMessage();
				}
			}
			setErrorMessage(errorMessage);
			setPageComplete(isPageComplete());
		}
	}

	// //////////////End SelectRootElementPage


	public static GridLayout createOptionsPanelLayout() {
		GridLayout gridLayout = new GridLayout();
		gridLayout.marginWidth = 0;
		gridLayout.horizontalSpacing = 0;
		return gridLayout;
	}


	/**
	 * 
	 */
	class XSDOptionsPanel extends Composite {
		protected String errorMessage = null;
		protected SelectRootElementPage parentPage;
		protected CommonEditNamespacesDialog editNamespaces;

		public XSDOptionsPanel(SelectRootElementPage parentPage, Composite parent) {
			super(parent, SWT.NONE);
			this.parentPage = parentPage;

			setLayout(createOptionsPanelLayout());
			setLayoutData(new GridData(GridData.FILL_BOTH));

			Composite co = new Composite(this, SWT.NONE);
			co.setLayout(new GridLayout());

			if (newFilePage != null && newFilePage.getContainerFullPath() != null) {
				// todo... this is a nasty mess. I need to revist this code.
				//
				String resourceURI = "platform:/resource" + newFilePage.getContainerFullPath().toString() + "/dummy"; //$NON-NLS-1$ //$NON-NLS-2$
				String resolvedPath = URIHelper.normalize(resourceURI, null, null);
				if (resolvedPath.startsWith("file:/")) //$NON-NLS-1$
				{
					resolvedPath = resolvedPath.substring(6);
				}
				// end nasty messs
				String tableTitle = XMLWizardsMessages._UI_LABEL_NAMESPACE_INFORMATION;
				editNamespaces = new CommonEditNamespacesDialog(co, new Path(resolvedPath), tableTitle, true, true);
			}
		}

		public void setNamespaceInfoList(List list) {
			editNamespaces.setNamespaceInfoList(list);
			editNamespaces.updateErrorMessage(list);
		}

		public void updateErrorMessage(List namespaceInfoList) {
			NamespaceInfoErrorHelper helper = new NamespaceInfoErrorHelper();
			errorMessage = helper.computeErrorMessage(namespaceInfoList, null);
			parentPage.updateErrorMessage();
		}


		public String computeErrorMessage() {
			return errorMessage;
		}
	}


	/**
	 * 
	 */
	public class DTDOptionsPanel extends Composite implements ModifyListener {
		protected Group group;
		protected Text systemIdField;
		protected Text publicIdField;
		protected SelectRootElementPage parentPage;

		public DTDOptionsPanel(SelectRootElementPage parentPage, Composite parent) {
			super(parent, SWT.NONE);
			this.parentPage = parentPage;
			setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

			setLayout(createOptionsPanelLayout());
			Group group = new Group(this, SWT.NONE);
			group.setText(XMLWizardsMessages._UI_LABEL_DOCTYPE_INFORMATION);

			GridLayout layout = new GridLayout();
			layout.numColumns = 2;
			group.setLayout(layout);
			group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

			Label publicIdLabel = new Label(group, SWT.NONE);
			publicIdLabel.setText(XMLWizardsMessages._UI_LABEL_PUBLIC_ID);
			publicIdField = new Text(group, SWT.SINGLE | SWT.BORDER);
			publicIdField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
			publicIdField.addModifyListener(this);
			PlatformUI.getWorkbench().getHelpSystem().setHelp(publicIdField, IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT5_HELPID);

			Label systemIdLabel = new Label(group, SWT.NONE);
			systemIdLabel.setText(XMLWizardsMessages._UI_LABEL_SYSTEM_ID);
			systemIdField = new Text(group, SWT.SINGLE | SWT.BORDER);
			systemIdField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
			systemIdField.addModifyListener(this);
			PlatformUI.getWorkbench().getHelpSystem().setHelp(systemIdField, IXMLWizardHelpContextIds.XML_NEWWIZARD_SELECTROOTELEMENT6_HELPID);
		}

		public void update() {
			String thePublicId = null;
			String theSystemId = null;
			ICatalogEntry xmlCatalogEntry = generator.getXMLCatalogEntry();

			if (xmlCatalogEntry != null) {
				if (xmlCatalogEntry.getEntryType() == ICatalogEntry.ENTRY_TYPE_PUBLIC) {
					thePublicId = xmlCatalogEntry.getKey();
					theSystemId = xmlCatalogEntry.getAttributeValue(ICatalogEntry.ATTR_WEB_URL);
					if (theSystemId == null) {
						theSystemId = generator.getGrammarURI().startsWith("http:") ? generator.getGrammarURI() : URIHelper.getLastSegment(generator.getGrammarURI()); //$NON-NLS-1$
					}
				}
				else {
					theSystemId = xmlCatalogEntry.getKey();
				}
			}
			else {
				theSystemId = getDefaultSystemId();
			}

			publicIdField.setText(thePublicId != null ? thePublicId : ""); //$NON-NLS-1$
			systemIdField.setText(theSystemId != null ? theSystemId : ""); //$NON-NLS-1$
		}

		public void modifyText(ModifyEvent e) {
			generator.setSystemId(systemIdField.getText());
			generator.setPublicId(publicIdField.getText());
			parentPage.updateErrorMessage();
		}

		public String computeErrorMessage() {
			return null;
		}
	}


}