bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/dialogs/NamespaceInfoTable.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * 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
  *     Jens Lukowski/Innoopract - initial renaming/restructuring
  *
  *******************************************************************************/
 package org.eclipse.wst.xml.ui.dialogs;

 import java.util.List;
 import java.util.Vector;

 import org.eclipse.core.runtime.IPath;
 import org.eclipse.jface.viewers.CellEditor;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.viewers.ILabelProviderListener;
 import org.eclipse.jface.viewers.ISelection;
 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.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableLayout;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.TextCellEditor;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jface.window.Window;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.MouseAdapter;
 import org.eclipse.swt.events.MouseEvent;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Image;
 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.Group;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.wst.common.contentmodel.util.NamespaceInfo;
 import org.eclipse.wst.xml.ui.internal.XMLUIPlugin;

 public class NamespaceInfoTable extends Composite {

 	/**
 	 * NamespaceInfoTableLabelProvider
 	 */
 	protected class NamespaceInfoTableLabelProvider implements ITableLabelProvider, IStructuredContentProvider {

 		public void addListener(ILabelProviderListener listener) {
 		}

 		public void dispose() {
 		}

 		public Image getColumnImage(Object object, int columnIndex) {
 			return null;
 		}

 		public String getColumnText(Object object, int column) {
 			NamespaceInfo info = (NamespaceInfo) object;
 			String result = null;
 			switch (column) {
 				case 0 : {
 					result = info.uri;
 					break;
 				}
 				case 1 : {
 					result = info.prefix;
 					break;
 				}
 				case 2 : {
 					result = info.locationHint;
 					break;
 				}
 			}
 			result = result != null ? result : ""; //$NON-NLS-1$
 			if (result.equals("")) { //$NON-NLS-1$
 				switch (column) {
 					case 0 : {
 						result = XMLUIPlugin.getResourceString("%_UI_NO_NAMESPACE_NAME"); //$NON-NLS-1$
 						break;
 					}
 					case 1 : {
 						result = XMLUIPlugin.getResourceString("%_UI_NO_PREFIX"); //$NON-NLS-1$
 						break;
 					}
 				}
 			}
 			return result;
 		}

 		 String getDefaultPrefix() {
 			String defaultPrefix = "p"; //$NON-NLS-1$
 			if (namespaceInfoList == null)
 				return defaultPrefix;
 			Vector v = new Vector();
 			for (int i = 0; i < namespaceInfoList.size(); i++) {
 				NamespaceInfo nsinfo = (NamespaceInfo) namespaceInfoList.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;
 			} else
 				return defaultPrefix;
 		}

 		public Object[] getElements(Object inputElement) {
 			return namespaceInfoList.toArray();
 		}

 		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 		}

 		public boolean isDeleted(Object element) {
 			return false;
 		}

 		public boolean isLabelProperty(Object object, Object property) {
 			return false;
 		}

 		public boolean isLabelProperty(Object element, String property) {
 			return false;
 		}

 		public void removeListener(ILabelProviderListener listener) {
 		}
 	}

 	protected static final String LOCATION_HINT = XMLUIPlugin.getResourceString("%_UI_LABEL_LOCATION_HINT"); //$NON-NLS-1$
 	protected static final String NAMESPACE_URI = XMLUIPlugin.getResourceString("%_UI_LABEL_NAMESPACE_NAME"); //$NON-NLS-1$
 	protected static final String PREFIX = XMLUIPlugin.getResourceString("%_UI_LABEL_PREFIX"); //$NON-NLS-1$
 	protected Button deleteButton;
 	protected boolean dummyRowsRemoved = false;
 	protected Button editButton;
 	protected List namespaceInfoList = new Vector();
 	protected Button newButton;
 	protected NamespaceInfoTableLabelProvider provider;
 	protected IPath resourceLocation;
 	protected TableViewer tableViewer;
 	protected UpdateListener updateListener;
 	protected int visibleRows = -1;

 	public NamespaceInfoTable(Composite parent) {
 		this(parent, -1, -1, -1);
 	}

 	public NamespaceInfoTable(Composite parent, int visibleRows) {
 		this(parent, -1, -1, visibleRows);
 	}

 	public NamespaceInfoTable(Composite parent, int widthHint, int heightHint) {
 		this(parent, widthHint, heightHint, -1);
 	}

 	public NamespaceInfoTable(Composite parent, int widthHint, int heightHint, int visibleRows) {
 		super(parent, SWT.NONE);
 		setLayout(createGridLayout());
 		setLayoutData(new GridData(GridData.FILL_BOTH));
 		Group namespaceInfoGroup = new Group(this, SWT.NONE);
 		namespaceInfoGroup.setText(XMLUIPlugin.getResourceString("%_UI_LABEL_XML_SCHEMA_INFORMATION")); //$NON-NLS-1$
 		namespaceInfoGroup.setLayout(new GridLayout());
 		GridData gd = new GridData(GridData.FILL_BOTH);
 		if (widthHint != -1) {
 			gd.widthHint = widthHint;
 		}
 		if (heightHint != -1) {
 			gd.heightHint = heightHint;
 		}
 		namespaceInfoGroup.setLayoutData(gd);
 		//WorkbenchHelp.setHelp(namespaceInfoGroup, new
 		// ControlContextComputer(namespaceInfoGroup,
 		// XMLBuilderContextIds.XMLC_NAMESPACE_GROUP));
 		String[] titleArray = {NAMESPACE_URI, PREFIX, LOCATION_HINT};
 		tableViewer = new TableViewer(namespaceInfoGroup, SWT.FULL_SELECTION);
 		provider = new NamespaceInfoTableLabelProvider();
 		tableViewer.setContentProvider(provider);
 		tableViewer.setLabelProvider(provider);
 		tableViewer.setColumnProperties(titleArray);
 		Table table = tableViewer.getTable();
 		table.setHeaderVisible(true);
 		table.setLayoutData(new GridData(GridData.FILL_BOTH));
 		int[] widthArray = {50, 20, 30};
 		TableLayout layout = new TableLayout();
 		for (int i = 0; i < titleArray.length; i++) {
 			TableColumn column = new TableColumn(table, i);
 			column.setText(titleArray[i]);
 			column.setAlignment(SWT.LEFT);
 			layout.addColumnData(new ColumnWeightData(widthArray[i], true));
 		}
 		this.visibleRows = visibleRows;
 		for (int i = 0; i < visibleRows; i++) {
 			TableItem item = new TableItem(table, SWT.NONE);
 			item.setText("#######"); //$NON-NLS-1$
 		}
 		table.setLayout(layout);
 		CellEditor[] cellEditors = new CellEditor[titleArray.length];
 		cellEditors[1] = new TextCellEditor(table);
 		cellEditors[2] = new TextCellEditor(table);
 		tableViewer.setCellEditors(cellEditors);
 		MouseAdapter mouseAdapter = new MouseAdapter() {
 			public void mouseDoubleClick(MouseEvent e) {
 				if (tableViewer.getTable().getItem(new Point(e.x, e.y)) != null) {
 					performEdit();
 				}
 			}
 		};
 		table.addMouseListener(mouseAdapter);
 		createButtons(namespaceInfoGroup);
 		ISelectionChangedListener selectionChangedListener = new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent event) {
 				updateButtonEnabledState();
 			}
 		};
 		tableViewer.addSelectionChangedListener(selectionChangedListener);
 	}

 	protected void createButtons(Composite parent) {
 		Composite composite = new Composite(parent, SWT.NONE);
 		composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		GridLayout gridLayout = new GridLayout();
 		gridLayout.numColumns = 2;
 		gridLayout.marginHeight = 0;
 		gridLayout.marginWidth = 0;
 		composite.setLayout(gridLayout);
 		Button hiddenButton = new Button(composite, SWT.NONE);
 		hiddenButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		hiddenButton.setVisible(false);
 		hiddenButton.setEnabled(false);
 		SelectionListener selectionListener = new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				if (e.widget == newButton) {
 					performNew();
 				} else if (e.widget == editButton) {
 					performEdit();
 				} else if (e.widget == deleteButton) {
 					performDelete();
 				}
 			}
 		};
 		// create a composite to hold the three buttons
 		Composite buttonComposite = new Composite(composite, SWT.NONE);
 		buttonComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		GridLayout buttonGridLayout = new GridLayout();
 		buttonGridLayout.numColumns = 3;
 		buttonGridLayout.makeColumnsEqualWidth = true;
 		buttonComposite.setLayout(buttonGridLayout);
 		// add the New button
 		//
 		newButton = new Button(buttonComposite, SWT.NONE);
 		newButton.setText(XMLUIPlugin.getResourceString("%_UI_BUTTON_NEW")); //$NON-NLS-1$
 		newButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		newButton.addSelectionListener(selectionListener);
 		// add the Edit button
 		//
 		editButton = new Button(buttonComposite, SWT.NONE);
 		editButton.setText(XMLUIPlugin.getResourceString("%_UI_BUTTON_EDIT")); //$NON-NLS-1$
 		editButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		editButton.addSelectionListener(selectionListener);
 		// add the Delete button
 		//
 		deleteButton = new Button(buttonComposite, SWT.NONE);
 		deleteButton.setText(XMLUIPlugin.getResourceString("%_UI_BUTTON_DELETE")); //$NON-NLS-1$
 		deleteButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		deleteButton.addSelectionListener(selectionListener);
 	}

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

 	public List getNamespaceInfoList() {
 		return namespaceInfoList;
 	}

 	protected NamespaceInfo getTargetNamespaceInfo() {
 		return (namespaceInfoList != null && namespaceInfoList.size() > 0) ? (NamespaceInfo) namespaceInfoList.get(0) : null;
 	}

 	protected EditNamespaceInfoDialog invokeDialog(String title, NamespaceInfo info) {
 		Shell shell = XMLUIPlugin.getInstance().getWorkbench().getActiveWorkbenchWindow().getShell();
 		EditNamespaceInfoDialog dialog = new EditNamespaceInfoDialog(shell, info);
 		dialog.create();
 		dialog.getShell().setText(title);
 		dialog.setBlockOnOpen(true);
 		dialog.setResourceLocation(resourceLocation);
 		dialog.open();
 		return dialog;
 	}

 	protected void performDelayedUpdate() {
 		Runnable delayedUpdate = new Runnable() {
 			public void run() {
 				update();
 			}
 		};
 		getDisplay().asyncExec(delayedUpdate);
 		if (updateListener != null) {
 			updateListener.updateOccured(this, namespaceInfoList);
 		}
 	}

 	public void performDelete() {
 		ISelection selection = tableViewer.getSelection();
 		Object selectedObject = (selection instanceof IStructuredSelection) ? ((IStructuredSelection) selection).getFirstElement() : null;
 		if (selectedObject != null) {
 			namespaceInfoList.remove(selectedObject);
 			performDelayedUpdate();
 		}
 	}

 	public void performEdit() {
 		ISelection selection = tableViewer.getSelection();
 		Object selectedObject = (selection instanceof IStructuredSelection) ? ((IStructuredSelection) selection).getFirstElement() : null;
 		if (selectedObject instanceof NamespaceInfo) {
 			EditNamespaceInfoDialog dialog = invokeDialog(XMLUIPlugin.getResourceString("%_UI_LABEL_NEW_NAMESPACE_INFORMATION"), (NamespaceInfo) selectedObject); //$NON-NLS-1$
 			performDelayedUpdate();
 		}
 	}

 	public void performNew() {
 		NamespaceInfo info = new NamespaceInfo();
 		EditNamespaceInfoDialog dialog = invokeDialog(XMLUIPlugin.getResourceString("%_UI_LABEL_NEW_NAMESPACE_INFORMATION"), info); //$NON-NLS-1$
 		if (dialog.getReturnCode() == Window.OK) {
 			namespaceInfoList.add(info);
 			performDelayedUpdate();
 		}
 	}

 	public void setNamespaceInfoList(List namespaceInfoList) {
 		this.namespaceInfoList = namespaceInfoList;
 		update();
 	}

 	public void setResourceLocation(IPath resourceLocation) {
 		this.resourceLocation = resourceLocation;
 	}

 	public void setUpdateListener(UpdateListener updateListener) {
 		this.updateListener = updateListener;
 	}

 	public void update() {
 		updateHelper(namespaceInfoList);
 	}

 	public void updateButtonEnabledState() {
 		ISelection selection = tableViewer.getSelection();
 		Object selectedObject = (selection instanceof IStructuredSelection) ? ((IStructuredSelection) selection).getFirstElement() : null;
 		NamespaceInfo info = (NamespaceInfo) selectedObject;
 		editButton.setEnabled(info != null);
 		deleteButton.setEnabled(info != null && info.getProperty("unremovable") == null); //$NON-NLS-1$
 	}

 	public void updateHelper(List namespaceInfoList) {
 		if (visibleRows != -1 && !dummyRowsRemoved) {
 			dummyRowsRemoved = true;
 			tableViewer.getTable().removeAll();
 		}
 		ISelection selection = tableViewer.getSelection();
 		tableViewer.setInput(namespaceInfoList);
 		if (selection.isEmpty()) {
 			if (namespaceInfoList.size() > 0) {
 				tableViewer.setSelection(new StructuredSelection(namespaceInfoList.get(0)));
 			}
 		} else {
 			tableViewer.setSelection(selection);
 		}
 	}
 }
	/*******************************************************************************
	* 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
	* Jens Lukowski/Innoopract - initial renaming/restructuring
	*
	*******************************************************************************/
	package org.eclipse.wst.xml.ui.dialogs;

	import java.util.List;
	import java.util.Vector;

	import org.eclipse.core.runtime.IPath;
	import org.eclipse.jface.viewers.CellEditor;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.viewers.ILabelProviderListener;
	import org.eclipse.jface.viewers.ISelection;
	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.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TableLayout;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.TextCellEditor;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.jface.window.Window;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.MouseAdapter;
	import org.eclipse.swt.events.MouseEvent;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Image;
	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.Group;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.swt.widgets.TableItem;
	import org.eclipse.wst.common.contentmodel.util.NamespaceInfo;
	import org.eclipse.wst.xml.ui.internal.XMLUIPlugin;

	public class NamespaceInfoTable extends Composite {

	/**
	* NamespaceInfoTableLabelProvider
	*/
	protected class NamespaceInfoTableLabelProvider implements ITableLabelProvider, IStructuredContentProvider {

	public void addListener(ILabelProviderListener listener) {
	}

	public void dispose() {
	}

	public Image getColumnImage(Object object, int columnIndex) {
	return null;
	}

	public String getColumnText(Object object, int column) {
	NamespaceInfo info = (NamespaceInfo) object;
	String result = null;
	switch (column) {
	case 0 : {
	result = info.uri;
	break;
	}
	case 1 : {
	result = info.prefix;
	break;
	}
	case 2 : {
	result = info.locationHint;
	break;
	}
	}
	result = result != null ? result : ""; //$NON-NLS-1$
	if (result.equals("")) { //$NON-NLS-1$
	switch (column) {
	case 0 : {
	result = XMLUIPlugin.getResourceString("%_UI_NO_NAMESPACE_NAME"); //$NON-NLS-1$
	break;
	}
	case 1 : {
	result = XMLUIPlugin.getResourceString("%_UI_NO_PREFIX"); //$NON-NLS-1$
	break;
	}
	}
	}
	return result;
	}

	String getDefaultPrefix() {
	String defaultPrefix = "p"; //$NON-NLS-1$
	if (namespaceInfoList == null)
	return defaultPrefix;
	Vector v = new Vector();
	for (int i = 0; i < namespaceInfoList.size(); i++) {
	NamespaceInfo nsinfo = (NamespaceInfo) namespaceInfoList.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;
	} else
	return defaultPrefix;
	}

	public Object[] getElements(Object inputElement) {
	return namespaceInfoList.toArray();
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	}

	public boolean isDeleted(Object element) {
	return false;
	}

	public boolean isLabelProperty(Object object, Object property) {
	return false;
	}

	public boolean isLabelProperty(Object element, String property) {
	return false;
	}

	public void removeListener(ILabelProviderListener listener) {
	}
	}

	protected static final String LOCATION_HINT = XMLUIPlugin.getResourceString("%_UI_LABEL_LOCATION_HINT"); //$NON-NLS-1$
	protected static final String NAMESPACE_URI = XMLUIPlugin.getResourceString("%_UI_LABEL_NAMESPACE_NAME"); //$NON-NLS-1$
	protected static final String PREFIX = XMLUIPlugin.getResourceString("%_UI_LABEL_PREFIX"); //$NON-NLS-1$
	protected Button deleteButton;
	protected boolean dummyRowsRemoved = false;
	protected Button editButton;
	protected List namespaceInfoList = new Vector();
	protected Button newButton;
	protected NamespaceInfoTableLabelProvider provider;
	protected IPath resourceLocation;
	protected TableViewer tableViewer;
	protected UpdateListener updateListener;
	protected int visibleRows = -1;

	public NamespaceInfoTable(Composite parent) {
	this(parent, -1, -1, -1);
	}

	public NamespaceInfoTable(Composite parent, int visibleRows) {
	this(parent, -1, -1, visibleRows);
	}

	public NamespaceInfoTable(Composite parent, int widthHint, int heightHint) {
	this(parent, widthHint, heightHint, -1);
	}

	public NamespaceInfoTable(Composite parent, int widthHint, int heightHint, int visibleRows) {
	super(parent, SWT.NONE);
	setLayout(createGridLayout());
	setLayoutData(new GridData(GridData.FILL_BOTH));
	Group namespaceInfoGroup = new Group(this, SWT.NONE);
	namespaceInfoGroup.setText(XMLUIPlugin.getResourceString("%_UI_LABEL_XML_SCHEMA_INFORMATION")); //$NON-NLS-1$
	namespaceInfoGroup.setLayout(new GridLayout());
	GridData gd = new GridData(GridData.FILL_BOTH);
	if (widthHint != -1) {
	gd.widthHint = widthHint;
	}
	if (heightHint != -1) {
	gd.heightHint = heightHint;
	}
	namespaceInfoGroup.setLayoutData(gd);
	//WorkbenchHelp.setHelp(namespaceInfoGroup, new
	// ControlContextComputer(namespaceInfoGroup,
	// XMLBuilderContextIds.XMLC_NAMESPACE_GROUP));
	String[] titleArray = {NAMESPACE_URI, PREFIX, LOCATION_HINT};
	tableViewer = new TableViewer(namespaceInfoGroup, SWT.FULL_SELECTION);
	provider = new NamespaceInfoTableLabelProvider();
	tableViewer.setContentProvider(provider);
	tableViewer.setLabelProvider(provider);
	tableViewer.setColumnProperties(titleArray);
	Table table = tableViewer.getTable();
	table.setHeaderVisible(true);
	table.setLayoutData(new GridData(GridData.FILL_BOTH));
	int[] widthArray = {50, 20, 30};
	TableLayout layout = new TableLayout();
	for (int i = 0; i < titleArray.length; i++) {
	TableColumn column = new TableColumn(table, i);
	column.setText(titleArray[i]);
	column.setAlignment(SWT.LEFT);
	layout.addColumnData(new ColumnWeightData(widthArray[i], true));
	}
	this.visibleRows = visibleRows;
	for (int i = 0; i < visibleRows; i++) {
	TableItem item = new TableItem(table, SWT.NONE);
	item.setText("#######"); //$NON-NLS-1$
	}
	table.setLayout(layout);
	CellEditor[] cellEditors = new CellEditor[titleArray.length];
	cellEditors[1] = new TextCellEditor(table);
	cellEditors[2] = new TextCellEditor(table);
	tableViewer.setCellEditors(cellEditors);
	MouseAdapter mouseAdapter = new MouseAdapter() {
	public void mouseDoubleClick(MouseEvent e) {
	if (tableViewer.getTable().getItem(new Point(e.x, e.y)) != null) {
	performEdit();
	}
	}
	};
	table.addMouseListener(mouseAdapter);
	createButtons(namespaceInfoGroup);
	ISelectionChangedListener selectionChangedListener = new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	updateButtonEnabledState();
	}
	};
	tableViewer.addSelectionChangedListener(selectionChangedListener);
	}

	protected void createButtons(Composite parent) {
	Composite composite = new Composite(parent, SWT.NONE);
	composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	GridLayout gridLayout = new GridLayout();
	gridLayout.numColumns = 2;
	gridLayout.marginHeight = 0;
	gridLayout.marginWidth = 0;
	composite.setLayout(gridLayout);
	Button hiddenButton = new Button(composite, SWT.NONE);
	hiddenButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	hiddenButton.setVisible(false);
	hiddenButton.setEnabled(false);
	SelectionListener selectionListener = new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	if (e.widget == newButton) {
	performNew();
	} else if (e.widget == editButton) {
	performEdit();
	} else if (e.widget == deleteButton) {
	performDelete();
	}
	}
	};
	// create a composite to hold the three buttons
	Composite buttonComposite = new Composite(composite, SWT.NONE);
	buttonComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	GridLayout buttonGridLayout = new GridLayout();
	buttonGridLayout.numColumns = 3;
	buttonGridLayout.makeColumnsEqualWidth = true;
	buttonComposite.setLayout(buttonGridLayout);
	// add the New button
	//
	newButton = new Button(buttonComposite, SWT.NONE);
	newButton.setText(XMLUIPlugin.getResourceString("%_UI_BUTTON_NEW")); //$NON-NLS-1$
	newButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	newButton.addSelectionListener(selectionListener);
	// add the Edit button
	//
	editButton = new Button(buttonComposite, SWT.NONE);
	editButton.setText(XMLUIPlugin.getResourceString("%_UI_BUTTON_EDIT")); //$NON-NLS-1$
	editButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	editButton.addSelectionListener(selectionListener);
	// add the Delete button
	//
	deleteButton = new Button(buttonComposite, SWT.NONE);
	deleteButton.setText(XMLUIPlugin.getResourceString("%_UI_BUTTON_DELETE")); //$NON-NLS-1$
	deleteButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	deleteButton.addSelectionListener(selectionListener);
	}

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

	public List getNamespaceInfoList() {
	return namespaceInfoList;
	}

	protected NamespaceInfo getTargetNamespaceInfo() {
	return (namespaceInfoList != null && namespaceInfoList.size() > 0) ? (NamespaceInfo) namespaceInfoList.get(0) : null;
	}

	protected EditNamespaceInfoDialog invokeDialog(String title, NamespaceInfo info) {
	Shell shell = XMLUIPlugin.getInstance().getWorkbench().getActiveWorkbenchWindow().getShell();
	EditNamespaceInfoDialog dialog = new EditNamespaceInfoDialog(shell, info);
	dialog.create();
	dialog.getShell().setText(title);
	dialog.setBlockOnOpen(true);
	dialog.setResourceLocation(resourceLocation);
	dialog.open();
	return dialog;
	}

	protected void performDelayedUpdate() {
	Runnable delayedUpdate = new Runnable() {
	public void run() {
	update();
	}
	};
	getDisplay().asyncExec(delayedUpdate);
	if (updateListener != null) {
	updateListener.updateOccured(this, namespaceInfoList);
	}
	}

	public void performDelete() {
	ISelection selection = tableViewer.getSelection();
	Object selectedObject = (selection instanceof IStructuredSelection) ? ((IStructuredSelection) selection).getFirstElement() : null;
	if (selectedObject != null) {
	namespaceInfoList.remove(selectedObject);
	performDelayedUpdate();
	}
	}

	public void performEdit() {
	ISelection selection = tableViewer.getSelection();
	Object selectedObject = (selection instanceof IStructuredSelection) ? ((IStructuredSelection) selection).getFirstElement() : null;
	if (selectedObject instanceof NamespaceInfo) {
	EditNamespaceInfoDialog dialog = invokeDialog(XMLUIPlugin.getResourceString("%_UI_LABEL_NEW_NAMESPACE_INFORMATION"), (NamespaceInfo) selectedObject); //$NON-NLS-1$
	performDelayedUpdate();
	}
	}

	public void performNew() {
	NamespaceInfo info = new NamespaceInfo();
	EditNamespaceInfoDialog dialog = invokeDialog(XMLUIPlugin.getResourceString("%_UI_LABEL_NEW_NAMESPACE_INFORMATION"), info); //$NON-NLS-1$
	if (dialog.getReturnCode() == Window.OK) {
	namespaceInfoList.add(info);
	performDelayedUpdate();
	}
	}

	public void setNamespaceInfoList(List namespaceInfoList) {
	this.namespaceInfoList = namespaceInfoList;
	update();
	}

	public void setResourceLocation(IPath resourceLocation) {
	this.resourceLocation = resourceLocation;
	}

	public void setUpdateListener(UpdateListener updateListener) {
	this.updateListener = updateListener;
	}

	public void update() {
	updateHelper(namespaceInfoList);
	}

	public void updateButtonEnabledState() {
	ISelection selection = tableViewer.getSelection();
	Object selectedObject = (selection instanceof IStructuredSelection) ? ((IStructuredSelection) selection).getFirstElement() : null;
	NamespaceInfo info = (NamespaceInfo) selectedObject;
	editButton.setEnabled(info != null);
	deleteButton.setEnabled(info != null && info.getProperty("unremovable") == null); //$NON-NLS-1$
	}

	public void updateHelper(List namespaceInfoList) {
	if (visibleRows != -1 && !dummyRowsRemoved) {
	dummyRowsRemoved = true;
	tableViewer.getTable().removeAll();
	}
	ISelection selection = tableViewer.getSelection();
	tableViewer.setInput(namespaceInfoList);
	if (selection.isEmpty()) {
	if (namespaceInfoList.size() > 0) {
	tableViewer.setSelection(new StructuredSelection(namespaceInfoList.get(0)));
	}
	} else {
	tableViewer.setSelection(selection);
	}
	}
	}