bundles/org.eclipse.jst.jsp.ui/src/org/eclipse/jst/jsp/ui/internal/wizard/NewTagTemplatesWizardPage.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2008 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.jst.jsp.ui.internal.wizard;

 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.preference.PreferenceDialog;
 import org.eclipse.jface.resource.JFaceResources;
 import org.eclipse.jface.text.Document;
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.source.ISourceViewer;
 import org.eclipse.jface.text.source.SourceViewer;
 import org.eclipse.jface.text.source.SourceViewerConfiguration;
 import org.eclipse.jface.text.templates.DocumentTemplateContext;
 import org.eclipse.jface.text.templates.Template;
 import org.eclipse.jface.text.templates.TemplateBuffer;
 import org.eclipse.jface.text.templates.TemplateContext;
 import org.eclipse.jface.text.templates.TemplateContextType;
 import org.eclipse.jface.text.templates.persistence.TemplateStore;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableLayout;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jface.viewers.ViewerSorter;
 import org.eclipse.jface.wizard.WizardPage;
 import org.eclipse.jst.jsp.core.internal.provisional.contenttype.ContentTypeIdForJSP;
 import org.eclipse.jst.jsp.ui.StructuredTextViewerConfigurationJSP;
 import org.eclipse.jst.jsp.ui.internal.JSPUIMessages;
 import org.eclipse.jst.jsp.ui.internal.JSPUIPlugin;
 import org.eclipse.jst.jsp.ui.internal.Logger;
 import org.eclipse.jst.jsp.ui.internal.editor.IHelpContextIds;
 import org.eclipse.jst.jsp.ui.internal.preferences.JSPUIPreferenceNames;
 import org.eclipse.jst.jsp.ui.internal.templates.TemplateContextTypeIdsJSP;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.graphics.Rectangle;
 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.Control;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Link;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.dialogs.PreferencesUtil;
 import org.eclipse.wst.sse.core.StructuredModelManager;
 import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
 import org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration;
 import org.eclipse.wst.sse.ui.internal.StructuredTextViewer;
 import org.eclipse.wst.sse.ui.internal.provisional.style.LineStyleProvider;

 /**
  * Templates page in new file wizard. Allows users to select a new file
  * template to be applied in new file.
  *
  */
 public class NewTagTemplatesWizardPage extends WizardPage {

 	/**
 	 * Content provider for templates
 	 */
 	private class TemplateContentProvider implements IStructuredContentProvider {
 		/** The template store. */
 		private TemplateStore fStore;

 		/*
 		 * @see IContentProvider#dispose()
 		 */
 		public void dispose() {
 			fStore = null;
 		}

 		/*
 		 * @see IStructuredContentProvider#getElements(Object)
 		 */
 		public Object[] getElements(Object input) {
 			return fStore.getTemplates(TemplateContextTypeIdsJSP.NEW_TAG);
 		}

 		/*
 		 * @see IContentProvider#inputChanged(Viewer, Object, Object)
 		 */
 		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 			fStore = (TemplateStore) newInput;
 		}
 	}

 	/**
 	 * Label provider for templates.
 	 */
 	private class TemplateLabelProvider extends LabelProvider implements ITableLabelProvider {

 		/*
 		 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object,
 		 *      int)
 		 */
 		public Image getColumnImage(Object element, int columnIndex) {
 			return null;
 		}

 		/*
 		 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object,
 		 *      int)
 		 */
 		public String getColumnText(Object element, int columnIndex) {
 			Template template = (Template) element;

 			switch (columnIndex) {
 				case 0 :
 					return template.getName();
 				case 1 :
 					return template.getDescription();
 				default :
 					return ""; //$NON-NLS-1$
 			}
 		}
 	}

 	/** Last selected template name */
 	private String fLastSelectedTemplateName;
 	/** The viewer displays the pattern of selected template. */
 	private SourceViewer fPatternViewer;
 	/** The table presenting the templates. */
 	private TableViewer fTableViewer;
 	/** Template store used by this wizard page */
 	private TemplateStore fTemplateStore;
 	/** Checkbox for using templates. */
 	private Button fUseTemplateButton;

 	public NewTagTemplatesWizardPage() {
 		super("NewJSPTemplatesWizardPage", JSPUIMessages.NewTagTemplatesWizardPage_0, null); //$NON-NLS-1$
 		setDescription(JSPUIMessages.NewTagTemplatesWizardPage_1);
 	}

 	/**
 	 * Correctly resizes the table so no phantom columns appear
 	 *
 	 * @param parent
 	 *            the parent control
 	 * @param buttons
 	 *            the buttons
 	 * @param table
 	 *            the table
 	 * @param column1
 	 *            the first column
 	 * @param column2
 	 *            the second column
 	 * @param column3
 	 *            the third column
 	 */
 	private void configureTableResizing(final Composite parent, final Table table, final TableColumn column1, final TableColumn column2) {
 		parent.addControlListener(new ControlAdapter() {
 			public void controlResized(ControlEvent e) {
 				Rectangle area = parent.getClientArea();
 				Point preferredSize = table.computeSize(SWT.DEFAULT, SWT.DEFAULT);
 				int width = area.width - 2 * table.getBorderWidth();
 				if (preferredSize.y > area.height) {
 					// Subtract the scrollbar width from the total column
 					// width
 					// if a vertical scrollbar will be required
 					Point vBarSize = table.getVerticalBar().getSize();
 					width -= vBarSize.x;
 				}

 				Point oldSize = table.getSize();
 				if (oldSize.x > width) {
 					// table is getting smaller so make the columns
 					// smaller first and then resize the table to
 					// match the client area width
 					column1.setWidth(width / 2);
 					column2.setWidth(width / 2);
 					table.setSize(width, area.height);
 				}
 				else {
 					// table is getting bigger so make the table
 					// bigger first and then make the columns wider
 					// to match the client area width
 					table.setSize(width, area.height);
 					column1.setWidth(width / 2);
 					column2.setWidth(width / 2);
 				}
 			}
 		});
 	}

 	public void createControl(Composite ancestor) {
 		Composite parent = new Composite(ancestor, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 2;
 		parent.setLayout(layout);

 		// create checkbox for user to use JSP Template
 		fUseTemplateButton = new Button(parent, SWT.CHECK);
 		fUseTemplateButton.setText(JSPUIMessages.NewTagTemplatesWizardPage_4);
 		GridData data = new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1);
 		fUseTemplateButton.setLayoutData(data);
 		fUseTemplateButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				enableTemplates();
 			}
 		});

 		// create composite for Templates table
 		Composite innerParent = new Composite(parent, SWT.NONE);
 		GridLayout innerLayout = new GridLayout();
 		innerLayout.numColumns = 2;
 		innerLayout.marginHeight = 0;
 		innerLayout.marginWidth = 0;
 		innerParent.setLayout(innerLayout);
 		GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
 		innerParent.setLayoutData(gd);

 		// Create linked text to just to templates preference page
 		Link link = new Link(innerParent, SWT.NONE);
 		link.setText(JSPUIMessages.NewTagTemplatesWizardPage_6);
 		data = new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1);
 		link.setLayoutData(data);
 		link.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				linkClicked();
 			}
 		});

 		// create table that displays templates
 		Table table = new Table(innerParent, SWT.BORDER | SWT.FULL_SELECTION);

 		data = new GridData(GridData.FILL_BOTH);
 		data.widthHint = convertWidthInCharsToPixels(2);
 		data.heightHint = convertHeightInCharsToPixels(10);
 		data.horizontalSpan = 2;
 		table.setLayoutData(data);
 		table.setHeaderVisible(true);
 		table.setLinesVisible(true);
 		TableLayout tableLayout = new TableLayout();
 		table.setLayout(tableLayout);

 		TableColumn column1 = new TableColumn(table, SWT.NONE);
 		column1.setText(JSPUIMessages.NewTagTemplatesWizardPage_2);

 		TableColumn column2 = new TableColumn(table, SWT.NONE);
 		column2.setText(JSPUIMessages.NewTagTemplatesWizardPage_3);

 		fTableViewer = new TableViewer(table);
 		fTableViewer.setLabelProvider(new TemplateLabelProvider());
 		fTableViewer.setContentProvider(new TemplateContentProvider());

 		fTableViewer.setSorter(new ViewerSorter() {
 			public int compare(Viewer viewer, Object object1, Object object2) {
 				if ((object1 instanceof Template) && (object2 instanceof Template)) {
 					Template left = (Template) object1;
 					Template right = (Template) object2;
 					int result = left.getName().compareToIgnoreCase(right.getName());
 					if (result != 0)
 						return result;
 					return left.getDescription().compareToIgnoreCase(right.getDescription());
 				}
 				return super.compare(viewer, object1, object2);
 			}

 			public boolean isSorterProperty(Object element, String property) {
 				return true;
 			}
 		});

 		fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent e) {
 				updateViewerInput();
 			}
 		});

 		// create viewer that displays currently selected template's contents
 		fPatternViewer = doCreateViewer(parent);

 		fTemplateStore = JSPUIPlugin.getDefault().getTemplateStore();
 		fTableViewer.setInput(fTemplateStore);

 		configureTableResizing(innerParent, table, column1, column2);
 		loadLastSavedPreferences();

 		PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, IHelpContextIds.JSP_NEWWIZARD_TEMPLATE_HELPID);
 		Dialog.applyDialogFont(parent);
 		setControl(parent);
 	}

 	/**
 	 * Creates, configures and returns a source viewer to present the template
 	 * pattern on the preference page. Clients may override to provide a
 	 * custom source viewer featuring e.g. syntax coloring.
 	 *
 	 * @param parent
 	 *            the parent control
 	 * @return a configured source viewer
 	 */
 	private SourceViewer createViewer(Composite parent) {
 		SourceViewerConfiguration sourceViewerConfiguration = new StructuredTextViewerConfiguration() {
 			StructuredTextViewerConfiguration baseConfiguration = new StructuredTextViewerConfigurationJSP();

 			public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) {
 				return baseConfiguration.getConfiguredContentTypes(sourceViewer);
 			}

 			public LineStyleProvider[] getLineStyleProviders(ISourceViewer sourceViewer, String partitionType) {
 				return baseConfiguration.getLineStyleProviders(sourceViewer, partitionType);
 			}
 		};
 		SourceViewer viewer = new StructuredTextViewer(parent, null, null, false, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
 		((StructuredTextViewer) viewer).getTextWidget().setFont(JFaceResources.getFont("org.eclipse.wst.sse.ui.textfont")); //$NON-NLS-1$
 		IStructuredModel scratchModel = StructuredModelManager.getModelManager().createUnManagedStructuredModelFor(ContentTypeIdForJSP.ContentTypeID_JSPTAG);
 		IDocument document = scratchModel.getStructuredDocument();
 		viewer.configure(sourceViewerConfiguration);
 		viewer.setDocument(document);
 		return viewer;
 	}

 	private SourceViewer doCreateViewer(Composite parent) {
 		Label label = new Label(parent, SWT.NONE);
 		label.setText(JSPUIMessages.NewTagTemplatesWizardPage_5);
 		GridData data = new GridData();
 		data.horizontalSpan = 2;
 		label.setLayoutData(data);

 		SourceViewer viewer = createViewer(parent);
 		viewer.setEditable(false);

 		Control control = viewer.getControl();
 		data = new GridData(GridData.FILL_BOTH);
 		data.horizontalSpan = 2;
 		data.heightHint = convertHeightInCharsToPixels(5);
 		control.setLayoutData(data);

 		return viewer;
 	}

 	/**
 	 * Enable/disable controls in page based on fUseTemplateButton's current
 	 * state.
 	 */
 	void enableTemplates() {
 		boolean enabled = fUseTemplateButton.getSelection();

 		if (!enabled) {
 			// save last selected template
 			Template template = getSelectedTemplate();
 			if (template != null)
 				fLastSelectedTemplateName = template.getName();
 			else
 				fLastSelectedTemplateName = ""; //$NON-NLS-1$

 			fTableViewer.setSelection(null);
 		}
 		else {
 			setSelectedTemplate(fLastSelectedTemplateName);
 		}

 		fTableViewer.getControl().setEnabled(enabled);
 		fPatternViewer.getControl().setEnabled(enabled);
 	}

 	/**
 	 * Return the template preference page id
 	 *
 	 * @return
 	 */
 	private String getPreferencePageId() {
 		return "org.eclipse.wst.sse.ui.preferences.jsp.templates"; //$NON-NLS-1$
 	}

 	/**
 	 * Get the currently selected template.
 	 *
 	 * @return
 	 */
 	private Template getSelectedTemplate() {
 		Template template = null;
 		IStructuredSelection selection = (IStructuredSelection) fTableViewer.getSelection();

 		if (selection.size() == 1) {
 			template = (Template) selection.getFirstElement();
 		}
 		return template;
 	}

 	/**
 	 * Returns template string to insert.
 	 *
 	 * @return String to insert or null if none is to be inserted
 	 */
 	String getTemplateString() {
 		String templateString = null;

 		Template template = getSelectedTemplate();
 		if (template != null) {
 			TemplateContextType contextType = JSPUIPlugin.getDefault().getTemplateContextRegistry().getContextType(TemplateContextTypeIdsJSP.NEW);
 			IDocument document = new Document();
 			TemplateContext context = new DocumentTemplateContext(contextType, document, 0, 0);
 			try {
 				TemplateBuffer buffer = context.evaluate(template);
 				templateString = buffer.getString();
 			}
 			catch (Exception e) {
 				Logger.log(Logger.WARNING_DEBUG, "Could not create template for new jsp", e); //$NON-NLS-1$
 			}
 		}

 		return templateString;
 	}

 	void linkClicked() {
 		String pageId = getPreferencePageId();
 		PreferenceDialog dialog = PreferencesUtil.createPreferenceDialogOn(getShell(), pageId, new String[]{pageId}, null);
 		dialog.open();
 		fTableViewer.refresh();
 	}

 	/**
 	 * Load the last template name used in New JSP File wizard.
 	 */
 	private void loadLastSavedPreferences() {
 		String templateName = JSPUIPlugin.getDefault().getPreferenceStore().getString(JSPUIPreferenceNames.NEW_FILE_TEMPLATE_NAME);
 		if (templateName == null || templateName.length() == 0) {
 			fLastSelectedTemplateName = ""; //$NON-NLS-1$
 			fUseTemplateButton.setSelection(false);
 		}
 		else {
 			fLastSelectedTemplateName = templateName;
 			fUseTemplateButton.setSelection(true);
 		}
 		enableTemplates();
 	}

 	/**
 	 * Save template name used for next call to New JSP File wizard.
 	 */
 	void saveLastSavedPreferences() {
 		String templateName = ""; //$NON-NLS-1$

 		Template template = getSelectedTemplate();
 		if (template != null) {
 			templateName = template.getName();
 		}

 		JSPUIPlugin.getDefault().getPreferenceStore().setValue(JSPUIPreferenceNames.NEW_FILE_TEMPLATE_NAME, templateName);
 		JSPUIPlugin.getDefault().savePluginPreferences();
 	}

 	/**
 	 * Select a template in the table viewer given the template name. If
 	 * template name cannot be found or templateName is null, just select
 	 * first item in table. If no items in table select nothing.
 	 *
 	 * @param templateName
 	 */
 	private void setSelectedTemplate(String templateName) {
 		Object template = null;

 		if (templateName != null && templateName.length() > 0) {
 			// pick the last used template
 			template = fTemplateStore.findTemplate(templateName, TemplateContextTypeIdsJSP.NEW);
 		}

 		// no record of last used template so just pick first element
 		if (template == null) {
 			// just pick first element
 			template = fTableViewer.getElementAt(0);
 		}

 		if (template != null) {
 			IStructuredSelection selection = new StructuredSelection(template);
 			fTableViewer.setSelection(selection, true);
 		}
 	}

 	/**
 	 * Updates the pattern viewer.
 	 */
 	void updateViewerInput() {
 		Template template = getSelectedTemplate();
 		if (template != null) {
 			fPatternViewer.getDocument().set(template.getPattern());
 		}
 		else {
 			fPatternViewer.getDocument().set(""); //$NON-NLS-1$
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2008 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.jst.jsp.ui.internal.wizard;

	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.preference.PreferenceDialog;
	import org.eclipse.jface.resource.JFaceResources;
	import org.eclipse.jface.text.Document;
	import org.eclipse.jface.text.IDocument;
	import org.eclipse.jface.text.source.ISourceViewer;
	import org.eclipse.jface.text.source.SourceViewer;
	import org.eclipse.jface.text.source.SourceViewerConfiguration;
	import org.eclipse.jface.text.templates.DocumentTemplateContext;
	import org.eclipse.jface.text.templates.Template;
	import org.eclipse.jface.text.templates.TemplateBuffer;
	import org.eclipse.jface.text.templates.TemplateContext;
	import org.eclipse.jface.text.templates.TemplateContextType;
	import org.eclipse.jface.text.templates.persistence.TemplateStore;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredContentProvider;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TableLayout;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.jface.viewers.ViewerSorter;
	import org.eclipse.jface.wizard.WizardPage;
	import org.eclipse.jst.jsp.core.internal.provisional.contenttype.ContentTypeIdForJSP;
	import org.eclipse.jst.jsp.ui.StructuredTextViewerConfigurationJSP;
	import org.eclipse.jst.jsp.ui.internal.JSPUIMessages;
	import org.eclipse.jst.jsp.ui.internal.JSPUIPlugin;
	import org.eclipse.jst.jsp.ui.internal.Logger;
	import org.eclipse.jst.jsp.ui.internal.editor.IHelpContextIds;
	import org.eclipse.jst.jsp.ui.internal.preferences.JSPUIPreferenceNames;
	import org.eclipse.jst.jsp.ui.internal.templates.TemplateContextTypeIdsJSP;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ControlAdapter;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.graphics.Rectangle;
	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.Control;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Link;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.dialogs.PreferencesUtil;
	import org.eclipse.wst.sse.core.StructuredModelManager;
	import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
	import org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration;
	import org.eclipse.wst.sse.ui.internal.StructuredTextViewer;
	import org.eclipse.wst.sse.ui.internal.provisional.style.LineStyleProvider;

	/**
	* Templates page in new file wizard. Allows users to select a new file
	* template to be applied in new file.
	*
	*/
	public class NewTagTemplatesWizardPage extends WizardPage {

	/**
	* Content provider for templates
	*/
	private class TemplateContentProvider implements IStructuredContentProvider {
	/** The template store. */
	private TemplateStore fStore;

	/*
	* @see IContentProvider#dispose()
	*/
	public void dispose() {
	fStore = null;
	}

	/*
	* @see IStructuredContentProvider#getElements(Object)
	*/
	public Object[] getElements(Object input) {
	return fStore.getTemplates(TemplateContextTypeIdsJSP.NEW_TAG);
	}

	/*
	* @see IContentProvider#inputChanged(Viewer, Object, Object)
	*/
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	fStore = (TemplateStore) newInput;
	}
	}

	/**
	* Label provider for templates.
	*/
	private class TemplateLabelProvider extends LabelProvider implements ITableLabelProvider {

	/*
	* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object,
	* int)
	*/
	public Image getColumnImage(Object element, int columnIndex) {
	return null;
	}

	/*
	* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object,
	* int)
	*/
	public String getColumnText(Object element, int columnIndex) {
	Template template = (Template) element;

	switch (columnIndex) {
	case 0 :
	return template.getName();
	case 1 :
	return template.getDescription();
	default :
	return ""; //$NON-NLS-1$
	}
	}
	}

	/** Last selected template name */
	private String fLastSelectedTemplateName;
	/** The viewer displays the pattern of selected template. */
	private SourceViewer fPatternViewer;
	/** The table presenting the templates. */
	private TableViewer fTableViewer;
	/** Template store used by this wizard page */
	private TemplateStore fTemplateStore;
	/** Checkbox for using templates. */
	private Button fUseTemplateButton;

	public NewTagTemplatesWizardPage() {
	super("NewJSPTemplatesWizardPage", JSPUIMessages.NewTagTemplatesWizardPage_0, null); //$NON-NLS-1$
	setDescription(JSPUIMessages.NewTagTemplatesWizardPage_1);
	}

	/**
	* Correctly resizes the table so no phantom columns appear
	*
	* @param parent
	* the parent control
	* @param buttons
	* the buttons
	* @param table
	* the table
	* @param column1
	* the first column
	* @param column2
	* the second column
	* @param column3
	* the third column
	*/
	private void configureTableResizing(final Composite parent, final Table table, final TableColumn column1, final TableColumn column2) {
	parent.addControlListener(new ControlAdapter() {
	public void controlResized(ControlEvent e) {
	Rectangle area = parent.getClientArea();
	Point preferredSize = table.computeSize(SWT.DEFAULT, SWT.DEFAULT);
	int width = area.width - 2 * table.getBorderWidth();
	if (preferredSize.y > area.height) {
	// Subtract the scrollbar width from the total column
	// width
	// if a vertical scrollbar will be required
	Point vBarSize = table.getVerticalBar().getSize();
	width -= vBarSize.x;
	}

	Point oldSize = table.getSize();
	if (oldSize.x > width) {
	// table is getting smaller so make the columns
	// smaller first and then resize the table to
	// match the client area width
	column1.setWidth(width / 2);
	column2.setWidth(width / 2);
	table.setSize(width, area.height);
	}
	else {
	// table is getting bigger so make the table
	// bigger first and then make the columns wider
	// to match the client area width
	table.setSize(width, area.height);
	column1.setWidth(width / 2);
	column2.setWidth(width / 2);
	}
	}
	});
	}

	public void createControl(Composite ancestor) {
	Composite parent = new Composite(ancestor, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 2;
	parent.setLayout(layout);

	// create checkbox for user to use JSP Template
	fUseTemplateButton = new Button(parent, SWT.CHECK);
	fUseTemplateButton.setText(JSPUIMessages.NewTagTemplatesWizardPage_4);
	GridData data = new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1);
	fUseTemplateButton.setLayoutData(data);
	fUseTemplateButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	enableTemplates();
	}
	});

	// create composite for Templates table
	Composite innerParent = new Composite(parent, SWT.NONE);
	GridLayout innerLayout = new GridLayout();
	innerLayout.numColumns = 2;
	innerLayout.marginHeight = 0;
	innerLayout.marginWidth = 0;
	innerParent.setLayout(innerLayout);
	GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
	innerParent.setLayoutData(gd);

	// Create linked text to just to templates preference page
	Link link = new Link(innerParent, SWT.NONE);
	link.setText(JSPUIMessages.NewTagTemplatesWizardPage_6);
	data = new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1);
	link.setLayoutData(data);
	link.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	linkClicked();
	}
	});

	// create table that displays templates
	Table table = new Table(innerParent, SWT.BORDER \| SWT.FULL_SELECTION);

	data = new GridData(GridData.FILL_BOTH);
	data.widthHint = convertWidthInCharsToPixels(2);
	data.heightHint = convertHeightInCharsToPixels(10);
	data.horizontalSpan = 2;
	table.setLayoutData(data);
	table.setHeaderVisible(true);
	table.setLinesVisible(true);
	TableLayout tableLayout = new TableLayout();
	table.setLayout(tableLayout);

	TableColumn column1 = new TableColumn(table, SWT.NONE);
	column1.setText(JSPUIMessages.NewTagTemplatesWizardPage_2);

	TableColumn column2 = new TableColumn(table, SWT.NONE);
	column2.setText(JSPUIMessages.NewTagTemplatesWizardPage_3);

	fTableViewer = new TableViewer(table);
	fTableViewer.setLabelProvider(new TemplateLabelProvider());
	fTableViewer.setContentProvider(new TemplateContentProvider());

	fTableViewer.setSorter(new ViewerSorter() {
	public int compare(Viewer viewer, Object object1, Object object2) {
	if ((object1 instanceof Template) && (object2 instanceof Template)) {
	Template left = (Template) object1;
	Template right = (Template) object2;
	int result = left.getName().compareToIgnoreCase(right.getName());
	if (result != 0)
	return result;
	return left.getDescription().compareToIgnoreCase(right.getDescription());
	}
	return super.compare(viewer, object1, object2);
	}

	public boolean isSorterProperty(Object element, String property) {
	return true;
	}
	});

	fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent e) {
	updateViewerInput();
	}
	});

	// create viewer that displays currently selected template's contents
	fPatternViewer = doCreateViewer(parent);

	fTemplateStore = JSPUIPlugin.getDefault().getTemplateStore();
	fTableViewer.setInput(fTemplateStore);

	configureTableResizing(innerParent, table, column1, column2);
	loadLastSavedPreferences();

	PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, IHelpContextIds.JSP_NEWWIZARD_TEMPLATE_HELPID);
	Dialog.applyDialogFont(parent);
	setControl(parent);
	}

	/**
	* Creates, configures and returns a source viewer to present the template
	* pattern on the preference page. Clients may override to provide a
	* custom source viewer featuring e.g. syntax coloring.
	*
	* @param parent
	* the parent control
	* @return a configured source viewer
	*/
	private SourceViewer createViewer(Composite parent) {
	SourceViewerConfiguration sourceViewerConfiguration = new StructuredTextViewerConfiguration() {
	StructuredTextViewerConfiguration baseConfiguration = new StructuredTextViewerConfigurationJSP();

	public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) {
	return baseConfiguration.getConfiguredContentTypes(sourceViewer);
	}

	public LineStyleProvider[] getLineStyleProviders(ISourceViewer sourceViewer, String partitionType) {
	return baseConfiguration.getLineStyleProviders(sourceViewer, partitionType);
	}
	};
	SourceViewer viewer = new StructuredTextViewer(parent, null, null, false, SWT.BORDER \| SWT.V_SCROLL \| SWT.H_SCROLL);
	((StructuredTextViewer) viewer).getTextWidget().setFont(JFaceResources.getFont("org.eclipse.wst.sse.ui.textfont")); //$NON-NLS-1$
	IStructuredModel scratchModel = StructuredModelManager.getModelManager().createUnManagedStructuredModelFor(ContentTypeIdForJSP.ContentTypeID_JSPTAG);
	IDocument document = scratchModel.getStructuredDocument();
	viewer.configure(sourceViewerConfiguration);
	viewer.setDocument(document);
	return viewer;
	}

	private SourceViewer doCreateViewer(Composite parent) {
	Label label = new Label(parent, SWT.NONE);
	label.setText(JSPUIMessages.NewTagTemplatesWizardPage_5);
	GridData data = new GridData();
	data.horizontalSpan = 2;
	label.setLayoutData(data);

	SourceViewer viewer = createViewer(parent);
	viewer.setEditable(false);

	Control control = viewer.getControl();
	data = new GridData(GridData.FILL_BOTH);
	data.horizontalSpan = 2;
	data.heightHint = convertHeightInCharsToPixels(5);
	control.setLayoutData(data);

	return viewer;
	}

	/**
	* Enable/disable controls in page based on fUseTemplateButton's current
	* state.
	*/
	void enableTemplates() {
	boolean enabled = fUseTemplateButton.getSelection();

	if (!enabled) {
	// save last selected template
	Template template = getSelectedTemplate();
	if (template != null)
	fLastSelectedTemplateName = template.getName();
	else
	fLastSelectedTemplateName = ""; //$NON-NLS-1$

	fTableViewer.setSelection(null);
	}
	else {
	setSelectedTemplate(fLastSelectedTemplateName);
	}

	fTableViewer.getControl().setEnabled(enabled);
	fPatternViewer.getControl().setEnabled(enabled);
	}

	/**
	* Return the template preference page id
	*
	* @return
	*/
	private String getPreferencePageId() {
	return "org.eclipse.wst.sse.ui.preferences.jsp.templates"; //$NON-NLS-1$
	}

	/**
	* Get the currently selected template.
	*
	* @return
	*/
	private Template getSelectedTemplate() {
	Template template = null;
	IStructuredSelection selection = (IStructuredSelection) fTableViewer.getSelection();

	if (selection.size() == 1) {
	template = (Template) selection.getFirstElement();
	}
	return template;
	}

	/**
	* Returns template string to insert.
	*
	* @return String to insert or null if none is to be inserted
	*/
	String getTemplateString() {
	String templateString = null;

	Template template = getSelectedTemplate();
	if (template != null) {
	TemplateContextType contextType = JSPUIPlugin.getDefault().getTemplateContextRegistry().getContextType(TemplateContextTypeIdsJSP.NEW);
	IDocument document = new Document();
	TemplateContext context = new DocumentTemplateContext(contextType, document, 0, 0);
	try {
	TemplateBuffer buffer = context.evaluate(template);
	templateString = buffer.getString();
	}
	catch (Exception e) {
	Logger.log(Logger.WARNING_DEBUG, "Could not create template for new jsp", e); //$NON-NLS-1$
	}
	}

	return templateString;
	}

	void linkClicked() {
	String pageId = getPreferencePageId();
	PreferenceDialog dialog = PreferencesUtil.createPreferenceDialogOn(getShell(), pageId, new String[]{pageId}, null);
	dialog.open();
	fTableViewer.refresh();
	}

	/**
	* Load the last template name used in New JSP File wizard.
	*/
	private void loadLastSavedPreferences() {
	String templateName = JSPUIPlugin.getDefault().getPreferenceStore().getString(JSPUIPreferenceNames.NEW_FILE_TEMPLATE_NAME);
	if (templateName == null \|\| templateName.length() == 0) {
	fLastSelectedTemplateName = ""; //$NON-NLS-1$
	fUseTemplateButton.setSelection(false);
	}
	else {
	fLastSelectedTemplateName = templateName;
	fUseTemplateButton.setSelection(true);
	}
	enableTemplates();
	}

	/**
	* Save template name used for next call to New JSP File wizard.
	*/
	void saveLastSavedPreferences() {
	String templateName = ""; //$NON-NLS-1$

	Template template = getSelectedTemplate();
	if (template != null) {
	templateName = template.getName();
	}

	JSPUIPlugin.getDefault().getPreferenceStore().setValue(JSPUIPreferenceNames.NEW_FILE_TEMPLATE_NAME, templateName);
	JSPUIPlugin.getDefault().savePluginPreferences();
	}

	/**
	* Select a template in the table viewer given the template name. If
	* template name cannot be found or templateName is null, just select
	* first item in table. If no items in table select nothing.
	*
	* @param templateName
	*/
	private void setSelectedTemplate(String templateName) {
	Object template = null;

	if (templateName != null && templateName.length() > 0) {
	// pick the last used template
	template = fTemplateStore.findTemplate(templateName, TemplateContextTypeIdsJSP.NEW);
	}

	// no record of last used template so just pick first element
	if (template == null) {
	// just pick first element
	template = fTableViewer.getElementAt(0);
	}

	if (template != null) {
	IStructuredSelection selection = new StructuredSelection(template);
	fTableViewer.setSelection(selection, true);
	}
	}

	/**
	* Updates the pattern viewer.
	*/
	void updateViewerInput() {
	Template template = getSelectedTemplate();
	if (template != null) {
	fPatternViewer.getDocument().set(template.getPattern());
	}
	else {
	fPatternViewer.getDocument().set(""); //$NON-NLS-1$
	}
	}
	}