bundles/org.eclipse.wst.xml.ui/src-multipage/org/eclipse/wst/xml/ui/internal/tabletree/XMLTableTreeContentProvider.java - sourceediting/webtools.sourceediting - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2009 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/


 package org.eclipse.wst.xml.ui.internal.tabletree;

 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.ILabelProviderListener;
 import org.eclipse.jface.viewers.ITableColorProvider;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 import org.eclipse.jface.viewers.StructuredViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
 import org.eclipse.wst.sse.ui.internal.contentoutline.IJFaceNodeAdapter;
 import org.eclipse.wst.sse.ui.internal.contentoutline.IJFaceNodeAdapterFactory;
 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.modelquery.CMDocumentManager;
 import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.CMDocumentManagerListener;
 import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.ModelQuery;
 import org.eclipse.wst.xml.core.internal.contentmodel.util.CMDescriptionBuilder;
 import org.eclipse.wst.xml.core.internal.contentmodel.util.CMDocumentCache;
 import org.eclipse.wst.xml.core.internal.modelquery.ModelQueryUtil;
 import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
 import org.eclipse.wst.xml.ui.internal.Logger;
 import org.eclipse.wst.xml.ui.internal.util.SharedXMLEditorPluginImageHelper;
 import org.w3c.dom.Attr;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.ProcessingInstruction;
 import org.w3c.dom.Text;


 public class XMLTableTreeContentProvider implements ITreeContentProvider, ITableLabelProvider, ITableColorProvider, ILabelProvider, CMDocumentManagerListener {

 	protected CMDocumentManager documentManager;

 	StructuredViewer fViewer = null;

 	private TreeContentHelper treeContentHelper = new TreeContentHelper();

 	private CMDescriptionBuilder descriptionBuilder = new CMDescriptionBuilder();

 	private Color fCMColor = null;

 	public XMLTableTreeContentProvider() {
 		super();
 	}

 	//
 	// ILabelProvider stuff
 	//
 	public void addListener(ILabelProviderListener listener) {
 		// since we always return 'false' for "isLabelProperty",
 		// not need to listen. Maybe that should change some day?
 	}

 	// CMDocumentManagerListener
 	//
 	public void cacheCleared(CMDocumentCache cache) {
 		doDelayedRefreshForViewers();
 	}

 	public void cacheUpdated(CMDocumentCache cache, final String uri, int oldStatus, int newStatus, CMDocument cmDocument) {
 		if ((newStatus == CMDocumentCache.STATUS_LOADED) || (newStatus == CMDocumentCache.STATUS_ERROR)) {
 			doDelayedRefreshForViewers();
 		}
 	}

 	public void dispose() {
 		if (documentManager != null) {
 			documentManager.removeListener(this);
 		}
 		if (fViewer != null && fViewer.getInput() != null) {
 			if (fViewer.getInput() instanceof IDOMNode) {
 				IJFaceNodeAdapterFactory factory = (IJFaceNodeAdapterFactory) ((IDOMNode) fViewer.getInput()).getModel().getFactoryRegistry().getFactoryFor(IJFaceNodeAdapter.class);
 				if (factory != null) {
 					factory.removeListener(fViewer);
 				}
 			}
 		}
 		if (fCMColor != null) {
 			fCMColor.dispose();
 		}
 	}

 	private void doDelayedRefreshForViewers() {
 		if ((fViewer != null) && !fViewer.getControl().isDisposed()) {
 			fViewer.getControl().getDisplay().asyncExec(new Runnable() {
 				public void run() {
 					if ((fViewer != null) && !fViewer.getControl().isDisposed()) {
 						fViewer.refresh(true);
 					}
 				}
 			});
 		}
 	}

 	public Object[] getChildren(Object element) {
 		if (element instanceof INodeNotifier) {
 			((INodeNotifier) element).getAdapterFor(IJFaceNodeAdapter.class);
 		}
 		return treeContentHelper.getChildren(element);
 	}

 	public Image getColumnImage(Object object, int columnIndex) {
 		return (columnIndex == 0) ? getImage(object) : null;
 	}

 	//
 	// ITableLabelProvider stuff
 	//
 	public String getColumnText(Object object, int column) {
 		String result = null;
 		if (column == 0) {
 			result = getText(object);
 		}
 		else if ((column == 1) && (object instanceof Node)) {
 			result = treeContentHelper.getNodeValue((Node) object);
 			if (result == null)
 				result = getElementValueHelper((Element) object);

 		}
 		return result != null ? result : ""; //$NON-NLS-1$
 	}

 	private String getElementValueHelper(Element element) {
 		String result = null;

 		ModelQuery mq = ModelQueryUtil.getModelQuery(element.getOwnerDocument());
 		if ((result == null) && (mq != null)) {
 			CMElementDeclaration ed = mq.getCMElementDeclaration(element);
 			if ((ed != null) && !Boolean.TRUE.equals(ed.getProperty("isInferred"))) { //$NON-NLS-1$
 				result = descriptionBuilder.buildDescription(ed);
 			}
 		}
 		return result != null ? result : ""; //$NON-NLS-1$
 	}

 	public Object[] getElements(Object element) {
 		return getChildren(element);
 	}

 	public Image getImage(Object object) {
 		if (object instanceof INodeNotifier) {
 			((INodeNotifier) object).getAdapterFor(IJFaceNodeAdapter.class);
 		}

 		Image image = null;
 		if (object instanceof Node) {
 			Node node = (Node) object;
 			switch (node.getNodeType()) {
 				case Node.ATTRIBUTE_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_ATTRIBUTE);
 					break;
 				}
 				case Node.CDATA_SECTION_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_CDATASECTION);
 					break;
 				}
 				case Node.COMMENT_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_COMMENT);
 					break;
 				}
 				case Node.DOCUMENT_TYPE_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_DOCTYPE);
 					break;
 				}
 				case Node.ELEMENT_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_ELEMENT);
 					break;
 				}
 				case Node.PROCESSING_INSTRUCTION_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_PROCESSINGINSTRUCTION);
 					break;
 				}
 				case Node.TEXT_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_TXTEXT);
 					break;
 				}
 				case Node.ENTITY_REFERENCE_NODE : {
 					image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_ENTITY_REFERENCE);
 					break;
 				}
 			}

 			// if (image != null) {
 			// Image markerOverlayImage =
 			// overlayIconManager.getOverlayImageForObject(node);
 			// if (markerOverlayImage != null) {
 			// image = imageFactory.createCompositeImage(image,
 			// markerOverlayImage, ImageFactory.BOTTOM_LEFT);
 			// }
 			// }
 		}
 		return image;
 	}

 	public Object getParent(Object o) {
 		if (o instanceof INodeNotifier) {
 			((INodeNotifier) o).getAdapterFor(IJFaceNodeAdapter.class);
 		}

 		Object result = null;
 		if (o instanceof Node) {
 			Node node = (Node) o;
 			if (node.getNodeType() == Node.ATTRIBUTE_NODE) {
 				result = ((Attr) node).getOwnerElement();
 			}
 			else {
 				result = node.getParentNode();
 			}
 		}
 		return result;
 	}

 	public Element getRootElement(Document document) {
 		Element rootElement = null;

 		for (Node childNode = document.getFirstChild(); childNode != null; childNode = childNode.getNextSibling()) {
 			if (childNode.getNodeType() == Node.ELEMENT_NODE) {
 				rootElement = (Element) childNode;
 				break;
 			}
 		}
 		return rootElement;
 	}

 	public String getText(Object object) {
 		if (object instanceof INodeNotifier) {
 			((INodeNotifier) object).getAdapterFor(IJFaceNodeAdapter.class);
 		}

 		String result = null;
 		if (object instanceof Node) {
 			Node node = (Node) object;
 			switch (node.getNodeType()) {
 				case Node.ATTRIBUTE_NODE : {
 					result = node.getNodeName();
 					break;
 				}
 				case Node.DOCUMENT_TYPE_NODE : {
 					result = "DOCTYPE"; //$NON-NLS-1$
 					break;
 				}
 				case Node.ELEMENT_NODE : {
 					result = node.getNodeName();
 					break;
 				}
 				case Node.PROCESSING_INSTRUCTION_NODE : {
 					result = ((ProcessingInstruction) node).getTarget();
 					break;
 				}
 			}
 		}
 		return result != null ? result : ""; //$NON-NLS-1$
 	}

 	public boolean hasChildren(Object element) {
 		return getChildren(element).length > 0;
 	}

 	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 		// remove our listeners to the old state
 		if (oldInput != null) {
 			Document domDoc = (Document) oldInput;
 			ModelQuery mq = ModelQueryUtil.getModelQuery(domDoc);
 			if (mq != null) {
 				documentManager = mq.getCMDocumentManager();
 				if (documentManager != null) {
 					documentManager.removeListener(this);
 				}
 			}
 		}

 		if ((oldInput != null) && (oldInput instanceof IDOMNode)) {
 			IJFaceNodeAdapterFactory factory = (IJFaceNodeAdapterFactory) ((IDOMNode) oldInput).getModel().getFactoryRegistry().getFactoryFor(IJFaceNodeAdapter.class);
 			if (factory != null) {
 				factory.removeListener(viewer);
 			}
 		}

 		if (viewer instanceof StructuredViewer) {
 			fViewer = null;
 		}
 		else {
 			fViewer = (StructuredViewer) viewer;
 		}

 		if ((newInput != null) && (newInput instanceof IDOMNode)) {
 			IJFaceNodeAdapterFactory factory = (IJFaceNodeAdapterFactory) ((IDOMNode) newInput).getModel().getFactoryRegistry().getFactoryFor(IJFaceNodeAdapter.class);
 			if (factory != null) {
 				factory.addListener(viewer);
 			}
 		}

 		if (newInput != null) {
 			Document domDoc = (Document) newInput;
 			ModelQuery mq = ModelQueryUtil.getModelQuery(domDoc);

 			if (mq != null) {
 				documentManager = mq.getCMDocumentManager();
 				if (documentManager != null) {
 					documentManager.setPropertyEnabled(CMDocumentManager.PROPERTY_ASYNC_LOAD, true);
 					documentManager.addListener(this);
 				}
 			}
 		}
 	}

 	public boolean isDeleted(Object element) {
 		return element != null;
 	}

 	// the following methods handle filtering aspects of the viewer
 	//
 	//
 	public boolean isIgnorableText(Node node) {
 		boolean result = false;
 		try {
 			if (node.getNodeType() == Node.TEXT_NODE) {
 				String data = ((Text) node).getData();
 				result = ((data == null) || (data.trim().length() == 0));
 			}
 		}
 		catch (Exception e) {
 			Logger.logException(e);
 		}
 		return result;
 	}

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

 	public void propertyChanged(CMDocumentManager cmDocumentManager, String propertyName) {
 		if (cmDocumentManager.getPropertyEnabled(CMDocumentManager.PROPERTY_AUTO_LOAD)) {
 			doDelayedRefreshForViewers();
 		}
 	}

 	public void removeListener(ILabelProviderListener listener) {
 		// since we always return 'false' for "isLabelProperty",
 		// not need to listen. Maybe that should change some day?
 	}

 	public Color getBackground(Object element, int columnIndex) {
 		return null;
 	}

 	public Color getForeground(Object element, int columnIndex) {
 		if (columnIndex == 1 && treeContentHelper.getNodeValue((Node) element) == null)
 			return getCMColor();
 		return null;
 	}

 	private Color getCMColor() {
 		if (fCMColor == null) {
 			Color background = Display.getCurrent().getSystemColor(SWT.COLOR_LIST_BACKGROUND);
 			int r = Math.abs(background.getRed() - 125);
 			int g = Math.abs(background.getGreen() - 85);
 			int b = Math.abs(background.getBlue() - 105);
 			fCMColor = new Color(Display.getCurrent(), r, g, b);
 		}
 		return fCMColor;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2004, 2009 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/


	package org.eclipse.wst.xml.ui.internal.tabletree;

	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.ILabelProviderListener;
	import org.eclipse.jface.viewers.ITableColorProvider;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.ITreeContentProvider;
	import org.eclipse.jface.viewers.StructuredViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
	import org.eclipse.wst.sse.ui.internal.contentoutline.IJFaceNodeAdapter;
	import org.eclipse.wst.sse.ui.internal.contentoutline.IJFaceNodeAdapterFactory;
	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.modelquery.CMDocumentManager;
	import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.CMDocumentManagerListener;
	import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.ModelQuery;
	import org.eclipse.wst.xml.core.internal.contentmodel.util.CMDescriptionBuilder;
	import org.eclipse.wst.xml.core.internal.contentmodel.util.CMDocumentCache;
	import org.eclipse.wst.xml.core.internal.modelquery.ModelQueryUtil;
	import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
	import org.eclipse.wst.xml.ui.internal.Logger;
	import org.eclipse.wst.xml.ui.internal.util.SharedXMLEditorPluginImageHelper;
	import org.w3c.dom.Attr;
	import org.w3c.dom.Document;
	import org.w3c.dom.Element;
	import org.w3c.dom.Node;
	import org.w3c.dom.ProcessingInstruction;
	import org.w3c.dom.Text;


	public class XMLTableTreeContentProvider implements ITreeContentProvider, ITableLabelProvider, ITableColorProvider, ILabelProvider, CMDocumentManagerListener {

	protected CMDocumentManager documentManager;

	StructuredViewer fViewer = null;

	private TreeContentHelper treeContentHelper = new TreeContentHelper();

	private CMDescriptionBuilder descriptionBuilder = new CMDescriptionBuilder();

	private Color fCMColor = null;

	public XMLTableTreeContentProvider() {
	super();
	}

	//
	// ILabelProvider stuff
	//
	public void addListener(ILabelProviderListener listener) {
	// since we always return 'false' for "isLabelProperty",
	// not need to listen. Maybe that should change some day?
	}

	// CMDocumentManagerListener
	//
	public void cacheCleared(CMDocumentCache cache) {
	doDelayedRefreshForViewers();
	}

	public void cacheUpdated(CMDocumentCache cache, final String uri, int oldStatus, int newStatus, CMDocument cmDocument) {
	if ((newStatus == CMDocumentCache.STATUS_LOADED) \|\| (newStatus == CMDocumentCache.STATUS_ERROR)) {
	doDelayedRefreshForViewers();
	}
	}

	public void dispose() {
	if (documentManager != null) {
	documentManager.removeListener(this);
	}
	if (fViewer != null && fViewer.getInput() != null) {
	if (fViewer.getInput() instanceof IDOMNode) {
	IJFaceNodeAdapterFactory factory = (IJFaceNodeAdapterFactory) ((IDOMNode) fViewer.getInput()).getModel().getFactoryRegistry().getFactoryFor(IJFaceNodeAdapter.class);
	if (factory != null) {
	factory.removeListener(fViewer);
	}
	}
	}
	if (fCMColor != null) {
	fCMColor.dispose();
	}
	}

	private void doDelayedRefreshForViewers() {
	if ((fViewer != null) && !fViewer.getControl().isDisposed()) {
	fViewer.getControl().getDisplay().asyncExec(new Runnable() {
	public void run() {
	if ((fViewer != null) && !fViewer.getControl().isDisposed()) {
	fViewer.refresh(true);
	}
	}
	});
	}
	}

	public Object[] getChildren(Object element) {
	if (element instanceof INodeNotifier) {
	((INodeNotifier) element).getAdapterFor(IJFaceNodeAdapter.class);
	}
	return treeContentHelper.getChildren(element);
	}

	public Image getColumnImage(Object object, int columnIndex) {
	return (columnIndex == 0) ? getImage(object) : null;
	}

	//
	// ITableLabelProvider stuff
	//
	public String getColumnText(Object object, int column) {
	String result = null;
	if (column == 0) {
	result = getText(object);
	}
	else if ((column == 1) && (object instanceof Node)) {
	result = treeContentHelper.getNodeValue((Node) object);
	if (result == null)
	result = getElementValueHelper((Element) object);

	}
	return result != null ? result : ""; //$NON-NLS-1$
	}

	private String getElementValueHelper(Element element) {
	String result = null;

	ModelQuery mq = ModelQueryUtil.getModelQuery(element.getOwnerDocument());
	if ((result == null) && (mq != null)) {
	CMElementDeclaration ed = mq.getCMElementDeclaration(element);
	if ((ed != null) && !Boolean.TRUE.equals(ed.getProperty("isInferred"))) { //$NON-NLS-1$
	result = descriptionBuilder.buildDescription(ed);
	}
	}
	return result != null ? result : ""; //$NON-NLS-1$
	}

	public Object[] getElements(Object element) {
	return getChildren(element);
	}

	public Image getImage(Object object) {
	if (object instanceof INodeNotifier) {
	((INodeNotifier) object).getAdapterFor(IJFaceNodeAdapter.class);
	}

	Image image = null;
	if (object instanceof Node) {
	Node node = (Node) object;
	switch (node.getNodeType()) {
	case Node.ATTRIBUTE_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_ATTRIBUTE);
	break;
	}
	case Node.CDATA_SECTION_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_CDATASECTION);
	break;
	}
	case Node.COMMENT_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_COMMENT);
	break;
	}
	case Node.DOCUMENT_TYPE_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_DOCTYPE);
	break;
	}
	case Node.ELEMENT_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_ELEMENT);
	break;
	}
	case Node.PROCESSING_INSTRUCTION_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_PROCESSINGINSTRUCTION);
	break;
	}
	case Node.TEXT_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_TXTEXT);
	break;
	}
	case Node.ENTITY_REFERENCE_NODE : {
	image = SharedXMLEditorPluginImageHelper.getImage(SharedXMLEditorPluginImageHelper.IMG_OBJ_ENTITY_REFERENCE);
	break;
	}
	}

	// if (image != null) {
	// Image markerOverlayImage =
	// overlayIconManager.getOverlayImageForObject(node);
	// if (markerOverlayImage != null) {
	// image = imageFactory.createCompositeImage(image,
	// markerOverlayImage, ImageFactory.BOTTOM_LEFT);
	// }
	// }
	}
	return image;
	}

	public Object getParent(Object o) {
	if (o instanceof INodeNotifier) {
	((INodeNotifier) o).getAdapterFor(IJFaceNodeAdapter.class);
	}

	Object result = null;
	if (o instanceof Node) {
	Node node = (Node) o;
	if (node.getNodeType() == Node.ATTRIBUTE_NODE) {
	result = ((Attr) node).getOwnerElement();
	}
	else {
	result = node.getParentNode();
	}
	}
	return result;
	}

	public Element getRootElement(Document document) {
	Element rootElement = null;

	for (Node childNode = document.getFirstChild(); childNode != null; childNode = childNode.getNextSibling()) {
	if (childNode.getNodeType() == Node.ELEMENT_NODE) {
	rootElement = (Element) childNode;
	break;
	}
	}
	return rootElement;
	}

	public String getText(Object object) {
	if (object instanceof INodeNotifier) {
	((INodeNotifier) object).getAdapterFor(IJFaceNodeAdapter.class);
	}

	String result = null;
	if (object instanceof Node) {
	Node node = (Node) object;
	switch (node.getNodeType()) {
	case Node.ATTRIBUTE_NODE : {
	result = node.getNodeName();
	break;
	}
	case Node.DOCUMENT_TYPE_NODE : {
	result = "DOCTYPE"; //$NON-NLS-1$
	break;
	}
	case Node.ELEMENT_NODE : {
	result = node.getNodeName();
	break;
	}
	case Node.PROCESSING_INSTRUCTION_NODE : {
	result = ((ProcessingInstruction) node).getTarget();
	break;
	}
	}
	}
	return result != null ? result : ""; //$NON-NLS-1$
	}

	public boolean hasChildren(Object element) {
	return getChildren(element).length > 0;
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	// remove our listeners to the old state
	if (oldInput != null) {
	Document domDoc = (Document) oldInput;
	ModelQuery mq = ModelQueryUtil.getModelQuery(domDoc);
	if (mq != null) {
	documentManager = mq.getCMDocumentManager();
	if (documentManager != null) {
	documentManager.removeListener(this);
	}
	}
	}

	if ((oldInput != null) && (oldInput instanceof IDOMNode)) {
	IJFaceNodeAdapterFactory factory = (IJFaceNodeAdapterFactory) ((IDOMNode) oldInput).getModel().getFactoryRegistry().getFactoryFor(IJFaceNodeAdapter.class);
	if (factory != null) {
	factory.removeListener(viewer);
	}
	}

	if (viewer instanceof StructuredViewer) {
	fViewer = null;
	}
	else {
	fViewer = (StructuredViewer) viewer;
	}

	if ((newInput != null) && (newInput instanceof IDOMNode)) {
	IJFaceNodeAdapterFactory factory = (IJFaceNodeAdapterFactory) ((IDOMNode) newInput).getModel().getFactoryRegistry().getFactoryFor(IJFaceNodeAdapter.class);
	if (factory != null) {
	factory.addListener(viewer);
	}
	}

	if (newInput != null) {
	Document domDoc = (Document) newInput;
	ModelQuery mq = ModelQueryUtil.getModelQuery(domDoc);

	if (mq != null) {
	documentManager = mq.getCMDocumentManager();
	if (documentManager != null) {
	documentManager.setPropertyEnabled(CMDocumentManager.PROPERTY_ASYNC_LOAD, true);
	documentManager.addListener(this);
	}
	}
	}
	}

	public boolean isDeleted(Object element) {
	return element != null;
	}

	// the following methods handle filtering aspects of the viewer
	//
	//
	public boolean isIgnorableText(Node node) {
	boolean result = false;
	try {
	if (node.getNodeType() == Node.TEXT_NODE) {
	String data = ((Text) node).getData();
	result = ((data == null) \|\| (data.trim().length() == 0));
	}
	}
	catch (Exception e) {
	Logger.logException(e);
	}
	return result;
	}

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

	public void propertyChanged(CMDocumentManager cmDocumentManager, String propertyName) {
	if (cmDocumentManager.getPropertyEnabled(CMDocumentManager.PROPERTY_AUTO_LOAD)) {
	doDelayedRefreshForViewers();
	}
	}

	public void removeListener(ILabelProviderListener listener) {
	// since we always return 'false' for "isLabelProperty",
	// not need to listen. Maybe that should change some day?
	}

	public Color getBackground(Object element, int columnIndex) {
	return null;
	}

	public Color getForeground(Object element, int columnIndex) {
	if (columnIndex == 1 && treeContentHelper.getNodeValue((Node) element) == null)
	return getCMColor();
	return null;
	}

	private Color getCMColor() {
	if (fCMColor == null) {
	Color background = Display.getCurrent().getSystemColor(SWT.COLOR_LIST_BACKGROUND);
	int r = Math.abs(background.getRed() - 125);
	int g = Math.abs(background.getGreen() - 85);
	int b = Math.abs(background.getBlue() - 105);
	fCMColor = new Color(Display.getCurrent(), r, g, b);
	}
	return fCMColor;
	}
	}