bundles/org.eclipse.wst.html.ui/src-html-validation/org/eclipse/wst/html/internal/validation/HTMLValidator.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
  *******************************************************************************/
 package org.eclipse.wst.html.internal.validation;

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;

 import org.eclipse.core.filebuffers.ITextFileBuffer;
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.core.runtime.OperationCanceledException;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.content.IContentDescription;
 import org.eclipse.core.runtime.content.IContentType;
 import org.eclipse.core.runtime.content.IContentTypeManager;
 import org.eclipse.core.runtime.jobs.ISchedulingRule;
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.IRegion;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.wst.html.core.internal.validate.HTMLValidationAdapterFactory;
 import org.eclipse.wst.html.ui.internal.HTMLUIMessages;
 import org.eclipse.wst.sse.core.StructuredModelManager;
 import org.eclipse.wst.sse.core.internal.FileBufferModelManager;
 import org.eclipse.wst.sse.core.internal.provisional.IModelManager;
 import org.eclipse.wst.sse.core.internal.provisional.INodeAdapterFactory;
 import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
 import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
 import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
 import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
 import org.eclipse.wst.sse.core.internal.util.URIResolver;
 import org.eclipse.wst.sse.core.internal.validate.ValidationAdapter;
 import org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator;
 import org.eclipse.wst.validation.internal.core.Message;
 import org.eclipse.wst.validation.internal.core.ValidationException;
 import org.eclipse.wst.validation.internal.operations.IWorkbenchContext;
 import org.eclipse.wst.validation.internal.operations.WorkbenchReporter;
 import org.eclipse.wst.validation.internal.provisional.core.IMessage;
 import org.eclipse.wst.validation.internal.provisional.core.IReporter;
 import org.eclipse.wst.validation.internal.provisional.core.IValidationContext;
 import org.eclipse.wst.validation.internal.provisional.core.IValidatorJob;
 import org.eclipse.wst.xml.core.internal.document.DocumentTypeAdapter;
 import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
 import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
 import org.w3c.dom.Text;

 public class HTMLValidator implements IValidatorJob, ISourceValidator {
 	private static final String ORG_ECLIPSE_JST_JSP_CORE_JSPSOURCE = "org.eclipse.jst.jsp.core.jspsource"; //$NON-NLS-1$
 	private static final String ORG_ECLIPSE_WST_HTML_CORE_HTMLSOURCE = "org.eclipse.wst.html.core.htmlsource"; //$NON-NLS-1$

 	static boolean shouldValidate(IFile file) {
 		IResource resource = file;
 		do {
 			if (resource.isDerived() || resource.isTeamPrivateMember() || !resource.isAccessible() || (resource.getName().charAt(0) == '.' && resource.getType() == IResource.FOLDER)) {
 				return false;
 			}
 			resource = resource.getParent();
 		}
 		while ((resource.getType() & IResource.PROJECT) == 0);
 		return true;
 	}

 	private IDocument fDocument;

 	public HTMLValidator() {
 		super();
 	}

 	/**
 	 */
 	public void cleanup(IReporter reporter) {
 		// nothing to do
 	}

 	/**
 	 */
 	protected IDOMModel getModel(IProject project, IFile file) {
 		if (project == null || file == null)
 			return null;
 		if (!file.exists())
 			return null;
 		if (!canHandle(file))
 			return null;

 		IStructuredModel model = null;
 		IModelManager manager = StructuredModelManager.getModelManager();

 		try {
 			try {
 				model = manager.getModelForRead(file);
 			}
 			catch (UnsupportedEncodingException ex) {
 				// retry ignoring META charset for invalid META charset
 				// specification
 				// recreate input stream, because it is already partially read
 				model = manager.getModelForRead(file, new String(), null);
 			}
 		}
 		catch (UnsupportedEncodingException ex) {
 		}
 		catch (IOException ex) {
 		}
 		catch (CoreException ex) {
 		}

 		if (model == null)
 			return null;
 		if (!(model instanceof IDOMModel)) {
 			releaseModel(model);
 			return null;
 		}
 		return (IDOMModel) model;
 	}

 	/**
 	 */
 	protected HTMLValidationReporter getReporter(IReporter reporter, IFile file, IDOMModel model) {
 		return new HTMLValidationReporter(this, reporter, file, model);
 	}

 	/**
 	 * Check file extension to validate
 	 */
 	private boolean canHandle(IFile file) {
 		boolean result = false;
 		if (file != null) {
 			try {
 				IContentTypeManager contentTypeManager = Platform.getContentTypeManager();

 				IContentDescription contentDescription = file.getContentDescription();
 				IContentType htmlContentType = contentTypeManager.getContentType(ORG_ECLIPSE_WST_HTML_CORE_HTMLSOURCE);
 				if (contentDescription != null) {
 					IContentType fileContentType = contentDescription.getContentType();

 					if (htmlContentType != null) {
 						if (fileContentType.isKindOf(htmlContentType)) {
 							result = true;
 						}
 						else {
 							// ISSUE: here's a little "backwards" dependancy.
 							// there should be a "JSPEMBEDDEDHTML validator"
 							// contributed by JSP plugin.
 							IContentType jspContentType = contentTypeManager.getContentType(ORG_ECLIPSE_JST_JSP_CORE_JSPSOURCE);
 							if (jspContentType != null) {
 								result = fileContentType.isKindOf(jspContentType);
 							}
 						}
 					}
 				}
 				else if (htmlContentType != null) {
 					result = htmlContentType.isAssociatedWith(file.getName());
 				}
 			}
 			catch (CoreException e) {
 				// should be rare, but will ignore to avoid logging "encoding
 				// exceptions" and the like here.
 				// Logger.logException(e);
 			}
 		}
 		return result;
 	}

 	/**
 	 */
 	private boolean hasHTMLFeature(IDOMDocument document) {
 		DocumentTypeAdapter adapter = (DocumentTypeAdapter) document.getAdapterFor(DocumentTypeAdapter.class);
 		if (adapter == null)
 			return false;
 		return adapter.hasFeature("HTML");//$NON-NLS-1$
 	}

 	/**
 	 */
 	protected void releaseModel(IStructuredModel model) {
 		if (model != null)
 			model.releaseFromRead();
 	}

 	/**
 	 */
 	public void validate(IValidationContext helper, IReporter reporter) {
 		if (helper == null)
 			return;
 		if ((reporter != null) && (reporter.isCancelled() == true)) {
 			throw new OperationCanceledException();
 		}
 		String[] deltaArray = helper.getURIs();
 		if (deltaArray != null && deltaArray.length > 0) {
 			validateDelta(helper, reporter);
 		}
 		else {
 			validateFull(helper, reporter);
 		}
 	}

 	/**
 	 * This validate call is for the ISourceValidator partial document
 	 * validation approach
 	 *
 	 * @param dirtyRegion
 	 * @param helper
 	 * @param reporter
 	 * @see org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator
 	 */
 	public void validate(IRegion dirtyRegion, IValidationContext helper, IReporter reporter) {

 		if (helper == null || fDocument == null)
 			return;

 		if ((reporter != null) && (reporter.isCancelled() == true)) {
 			throw new OperationCanceledException();
 		}

 		IStructuredModel model = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
 		if (model == null)
 			return; // error

 		try {

 			IDOMDocument document = null;
 			if (model instanceof IDOMModel) {
 				document = ((IDOMModel) model).getDocument();
 			}

 			if (document == null || !hasHTMLFeature(document))
 				return; // ignore

 			ITextFileBuffer fb = FileBufferModelManager.getInstance().getBuffer(fDocument);
 			if (fb == null)
 				return;

 			IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(fb.getLocation());
 			if (file == null || !file.exists())
 				return;

 			// this will be the wrong region if it's Text (instead of Element)
 			// we don't know how to validate Text
 			IndexedRegion ir = getCoveringNode(dirtyRegion); //  model.getIndexedRegion(dirtyRegion.getOffset());
 			if (ir instanceof Text) {
 				while (ir != null && ir instanceof Text) {
 					// it's assumed that this gets the IndexedRegion to
 					// the right of the end offset
 					ir = model.getIndexedRegion(ir.getEndOffset());
 				}
 			}

 			if (ir instanceof INodeNotifier) {

 				INodeAdapterFactory factory = HTMLValidationAdapterFactory.getInstance();
 				ValidationAdapter adapter = (ValidationAdapter) factory.adapt((INodeNotifier) ir);
 				if (adapter == null)
 					return; // error

 				if (reporter != null) {
 					HTMLValidationReporter rep = null;
 					rep = getReporter(reporter, file, (IDOMModel) model);
 					rep.clear();
 					adapter.setReporter(rep);

 					String fileName = ""; //$NON-NLS-1$
 					IPath filePath = file.getFullPath();
 					if (filePath != null) {
 						fileName = filePath.toString();
 					}
 					String args[] = new String[]{fileName};

 					Message mess = new LocalizedMessage(IMessage.LOW_SEVERITY, NLS.bind(HTMLUIMessages.MESSAGE_HTML_VALIDATION_MESSAGE_UI_, args));
 					mess.setParams(args);
 					reporter.displaySubtask(this, mess);
 				}
 				adapter.validate(ir);
 			}
 		}
 		finally {
 			if (model != null)
 				model.releaseFromRead();
 		}
 	}

 	private IndexedRegion getCoveringNode(IRegion dirtyRegion) {

 		IndexedRegion largestRegion = null;
 		if(fDocument instanceof IStructuredDocument) {
 			IStructuredModel sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
 			try {
 				if(sModel != null) {
 					IStructuredDocumentRegion[] regions = ((IStructuredDocument)fDocument).getStructuredDocumentRegions(dirtyRegion.getOffset(), dirtyRegion.getLength());
 				    largestRegion = getLargest(regions);
 				}
 			}
 			finally {
 				if(sModel != null)
 					sModel.releaseFromRead();
 			}
 		}
 		return largestRegion;
 	}
 	protected IndexedRegion getLargest(IStructuredDocumentRegion[] sdRegions) {

 		if(sdRegions == null || sdRegions.length == 0)
 			return null;

 		IndexedRegion currentLargest = getCorrespondingNode(sdRegions[0]);
 		for (int i = 0; i < sdRegions.length; i++) {
 		    if(!sdRegions[i].isDeleted()) {
     			IndexedRegion corresponding = getCorrespondingNode(sdRegions[i]);

     			if(currentLargest instanceof Text)
     				currentLargest = corresponding;

                 if(corresponding != null) {
                 	if(!(corresponding instanceof Text)) {
 	        			if (corresponding.getStartOffset() <= currentLargest.getStartOffset()
 	        						&&  corresponding.getEndOffset() >= currentLargest.getEndOffset() )
 	        				currentLargest = corresponding;
                 	}
                 }

             }
 		}
 		return currentLargest;
 	}
 	protected IndexedRegion getCorrespondingNode(IStructuredDocumentRegion sdRegion) {
 		IStructuredModel sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
         IndexedRegion indexedRegion = null;
         try {
             if (sModel != null)
                 indexedRegion = sModel.getIndexedRegion(sdRegion.getStart());
         } finally {
             if (sModel != null)
                 sModel.releaseFromRead();
         }
         return indexedRegion;
     }

 	/**
 	 * @see org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator
 	 */
 	public void connect(IDocument document) {
 		fDocument = document;
 	}

 	/**
 	 * @see org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator
 	 */
 	public void disconnect(IDocument document) {
 		// don't need to do anything
 	}

 	/**
 	 */
 	protected HTMLValidationResult validate(IDOMModel model, IFile file) {
 		IProject prj = null;
 		if (file != null) {
 			prj = file.getProject();
 		}
 		if ((prj == null) && (model != null)) {
 			URIResolver res = model.getResolver();
 			if (res != null) {
 				prj = res.getProject();
 			}
 		}
 		final WorkbenchReporter reporter = new WorkbenchReporter(prj, new NullProgressMonitor());
 		return validate(reporter, file, model);
 	}

 	/**
 	 */
 	private HTMLValidationResult validate(IReporter reporter, IFile file, IDOMModel model) {
 		if (file == null || model == null)
 			return null; // error
 		IDOMDocument document = model.getDocument();
 		if (document == null)
 			return null; // error
 		if (!hasHTMLFeature(document))
 			return null; // ignore

 		INodeAdapterFactory factory = HTMLValidationAdapterFactory.getInstance();
 		ValidationAdapter adapter = (ValidationAdapter) factory.adapt(document);
 		if (adapter == null)
 			return null; // error

 		HTMLValidationReporter rep = getReporter(reporter, file, model);
 		rep.clear();
 		adapter.setReporter(rep);
 		if (reporter != null) {
 			String fileName = ""; //$NON-NLS-1$
 			IPath filePath = file.getFullPath();
 			if (filePath != null) {
 				fileName = filePath.toString();
 			}
 			String args[] = new String[]{fileName};

 			// Message mess = new Message("HTMLValidation", //$NON-NLS-1$
 			// SeverityEnum.LOW_SEVERITY,
 			// "MESSAGE_HTML_VALIDATION_MESSAGE_UI_", //$NON-NLS-1$
 			// args);
 			Message mess = new LocalizedMessage(IMessage.LOW_SEVERITY, NLS.bind(HTMLUIMessages.MESSAGE_HTML_VALIDATION_MESSAGE_UI_, args));
 			mess.setParams(args);
 			reporter.displaySubtask(this, mess);
 		}
 		adapter.validate(document);
 		return rep.getResult();
 	}

 	/**
 	 */
 	private void validateContainer(IValidationContext helper, IReporter reporter, IContainer container) {
 		try {
 			IResource[] resourceArray = container.members(false);
 			for (int i = 0; i < resourceArray.length; i++) {
 				IResource resource = resourceArray[i];
 				if (resource == null)
 					continue;
 				if (resource instanceof IFile) {
 					validateFile(helper, reporter, (IFile) resource);
 				}
 				else if (resource instanceof IContainer) {
 					validateContainer(helper, reporter, (IContainer) resource);
 				}
 			}
 		}
 		catch (CoreException ex) {
 		}
 	}

 	/**
 	 */
 	private void validateDelta(IValidationContext helper, IReporter reporter) {
 		String[] deltaArray = helper.getURIs();
 		for (int i = 0; i < deltaArray.length; i++) {
 			String delta = deltaArray[i];
 			if (delta == null)
 				continue;
 			IResource resource = getResource(delta);
 			if (resource == null || !(resource instanceof IFile))
 				continue;
 			validateFile(helper, reporter, (IFile) resource);
 		}
 	}

 	/**
 	 */
 	private void validateFile(IValidationContext helper, IReporter reporter, IFile file) {
 		if ((reporter != null) && (reporter.isCancelled() == true)) {
 			throw new OperationCanceledException();
 		}
 		if (!shouldValidate(file)) {
 			return;
 		}
 		IDOMModel model = getModel(file.getProject(), file);
 		if (model == null)
 			return;

 		try {
 			validate(reporter, file, model);
 		}
 		finally {
 			releaseModel(model);
 		}
 	}

 	/**
 	 */
 	private void validateFull(IValidationContext helper, IReporter reporter) {
 		IProject project = null;
 		String[] fileDelta = helper.getURIs();
 		if (helper instanceof IWorkbenchContext) {
 			IWorkbenchContext wbHelper = (IWorkbenchContext) helper;
 			project = wbHelper.getProject();
 		}
 		else {
 			// won't work for project validation (b/c nothing in file delta)
 			project = getResource(fileDelta[0]).getProject();
 		}
 		if (project == null)
 			return;
 		validateContainer(helper, reporter, project);
 	}

 	/*
 	 * added to get rid or dependency on IWorkbenchHelper
 	 *
 	 */
 	public IResource getResource(String delta) {
 		return ResourcesPlugin.getWorkspace().getRoot().getFile(new Path(delta));
 	}

 	public ISchedulingRule getSchedulingRule(IValidationContext helper) {
 		return null;
 	}

 	public IStatus validateInJob(IValidationContext helper, IReporter reporter) throws ValidationException {
 		// Exception catching was removed, see
 		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=123600
 		IStatus status = Status.OK_STATUS;
 		validate(helper, reporter);
 		return status;
 	}
 }
	/*******************************************************************************
	* 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.html.internal.validation;

	import java.io.IOException;
	import java.io.UnsupportedEncodingException;

	import org.eclipse.core.filebuffers.ITextFileBuffer;
	import org.eclipse.core.resources.IContainer;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.NullProgressMonitor;
	import org.eclipse.core.runtime.OperationCanceledException;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.core.runtime.content.IContentDescription;
	import org.eclipse.core.runtime.content.IContentType;
	import org.eclipse.core.runtime.content.IContentTypeManager;
	import org.eclipse.core.runtime.jobs.ISchedulingRule;
	import org.eclipse.jface.text.IDocument;
	import org.eclipse.jface.text.IRegion;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.wst.html.core.internal.validate.HTMLValidationAdapterFactory;
	import org.eclipse.wst.html.ui.internal.HTMLUIMessages;
	import org.eclipse.wst.sse.core.StructuredModelManager;
	import org.eclipse.wst.sse.core.internal.FileBufferModelManager;
	import org.eclipse.wst.sse.core.internal.provisional.IModelManager;
	import org.eclipse.wst.sse.core.internal.provisional.INodeAdapterFactory;
	import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
	import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
	import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
	import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
	import org.eclipse.wst.sse.core.internal.util.URIResolver;
	import org.eclipse.wst.sse.core.internal.validate.ValidationAdapter;
	import org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator;
	import org.eclipse.wst.validation.internal.core.Message;
	import org.eclipse.wst.validation.internal.core.ValidationException;
	import org.eclipse.wst.validation.internal.operations.IWorkbenchContext;
	import org.eclipse.wst.validation.internal.operations.WorkbenchReporter;
	import org.eclipse.wst.validation.internal.provisional.core.IMessage;
	import org.eclipse.wst.validation.internal.provisional.core.IReporter;
	import org.eclipse.wst.validation.internal.provisional.core.IValidationContext;
	import org.eclipse.wst.validation.internal.provisional.core.IValidatorJob;
	import org.eclipse.wst.xml.core.internal.document.DocumentTypeAdapter;
	import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
	import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
	import org.w3c.dom.Text;

	public class HTMLValidator implements IValidatorJob, ISourceValidator {
	private static final String ORG_ECLIPSE_JST_JSP_CORE_JSPSOURCE = "org.eclipse.jst.jsp.core.jspsource"; //$NON-NLS-1$
	private static final String ORG_ECLIPSE_WST_HTML_CORE_HTMLSOURCE = "org.eclipse.wst.html.core.htmlsource"; //$NON-NLS-1$

	static boolean shouldValidate(IFile file) {
	IResource resource = file;
	do {
	if (resource.isDerived() \|\| resource.isTeamPrivateMember() \|\| !resource.isAccessible() \|\| (resource.getName().charAt(0) == '.' && resource.getType() == IResource.FOLDER)) {
	return false;
	}
	resource = resource.getParent();
	}
	while ((resource.getType() & IResource.PROJECT) == 0);
	return true;
	}

	private IDocument fDocument;

	public HTMLValidator() {
	super();
	}

	/**
	*/
	public void cleanup(IReporter reporter) {
	// nothing to do
	}

	/**
	*/
	protected IDOMModel getModel(IProject project, IFile file) {
	if (project == null \|\| file == null)
	return null;
	if (!file.exists())
	return null;
	if (!canHandle(file))
	return null;

	IStructuredModel model = null;
	IModelManager manager = StructuredModelManager.getModelManager();

	try {
	try {
	model = manager.getModelForRead(file);
	}
	catch (UnsupportedEncodingException ex) {
	// retry ignoring META charset for invalid META charset
	// specification
	// recreate input stream, because it is already partially read
	model = manager.getModelForRead(file, new String(), null);
	}
	}
	catch (UnsupportedEncodingException ex) {
	}
	catch (IOException ex) {
	}
	catch (CoreException ex) {
	}

	if (model == null)
	return null;
	if (!(model instanceof IDOMModel)) {
	releaseModel(model);
	return null;
	}
	return (IDOMModel) model;
	}

	/**
	*/
	protected HTMLValidationReporter getReporter(IReporter reporter, IFile file, IDOMModel model) {
	return new HTMLValidationReporter(this, reporter, file, model);
	}

	/**
	* Check file extension to validate
	*/
	private boolean canHandle(IFile file) {
	boolean result = false;
	if (file != null) {
	try {
	IContentTypeManager contentTypeManager = Platform.getContentTypeManager();

	IContentDescription contentDescription = file.getContentDescription();
	IContentType htmlContentType = contentTypeManager.getContentType(ORG_ECLIPSE_WST_HTML_CORE_HTMLSOURCE);
	if (contentDescription != null) {
	IContentType fileContentType = contentDescription.getContentType();

	if (htmlContentType != null) {
	if (fileContentType.isKindOf(htmlContentType)) {
	result = true;
	}
	else {
	// ISSUE: here's a little "backwards" dependancy.
	// there should be a "JSPEMBEDDEDHTML validator"
	// contributed by JSP plugin.
	IContentType jspContentType = contentTypeManager.getContentType(ORG_ECLIPSE_JST_JSP_CORE_JSPSOURCE);
	if (jspContentType != null) {
	result = fileContentType.isKindOf(jspContentType);
	}
	}
	}
	}
	else if (htmlContentType != null) {
	result = htmlContentType.isAssociatedWith(file.getName());
	}
	}
	catch (CoreException e) {
	// should be rare, but will ignore to avoid logging "encoding
	// exceptions" and the like here.
	// Logger.logException(e);
	}
	}
	return result;
	}

	/**
	*/
	private boolean hasHTMLFeature(IDOMDocument document) {
	DocumentTypeAdapter adapter = (DocumentTypeAdapter) document.getAdapterFor(DocumentTypeAdapter.class);
	if (adapter == null)
	return false;
	return adapter.hasFeature("HTML");//$NON-NLS-1$
	}

	/**
	*/
	protected void releaseModel(IStructuredModel model) {
	if (model != null)
	model.releaseFromRead();
	}

	/**
	*/
	public void validate(IValidationContext helper, IReporter reporter) {
	if (helper == null)
	return;
	if ((reporter != null) && (reporter.isCancelled() == true)) {
	throw new OperationCanceledException();
	}
	String[] deltaArray = helper.getURIs();
	if (deltaArray != null && deltaArray.length > 0) {
	validateDelta(helper, reporter);
	}
	else {
	validateFull(helper, reporter);
	}
	}

	/**
	* This validate call is for the ISourceValidator partial document
	* validation approach
	*
	* @param dirtyRegion
	* @param helper
	* @param reporter
	* @see org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator
	*/
	public void validate(IRegion dirtyRegion, IValidationContext helper, IReporter reporter) {

	if (helper == null \|\| fDocument == null)
	return;

	if ((reporter != null) && (reporter.isCancelled() == true)) {
	throw new OperationCanceledException();
	}

	IStructuredModel model = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
	if (model == null)
	return; // error

	try {

	IDOMDocument document = null;
	if (model instanceof IDOMModel) {
	document = ((IDOMModel) model).getDocument();
	}

	if (document == null \|\| !hasHTMLFeature(document))
	return; // ignore

	ITextFileBuffer fb = FileBufferModelManager.getInstance().getBuffer(fDocument);
	if (fb == null)
	return;

	IFile file = ResourcesPlugin.getWorkspace().getRoot().getFile(fb.getLocation());
	if (file == null \|\| !file.exists())
	return;

	// this will be the wrong region if it's Text (instead of Element)
	// we don't know how to validate Text
	IndexedRegion ir = getCoveringNode(dirtyRegion); // model.getIndexedRegion(dirtyRegion.getOffset());
	if (ir instanceof Text) {
	while (ir != null && ir instanceof Text) {
	// it's assumed that this gets the IndexedRegion to
	// the right of the end offset
	ir = model.getIndexedRegion(ir.getEndOffset());
	}
	}

	if (ir instanceof INodeNotifier) {

	INodeAdapterFactory factory = HTMLValidationAdapterFactory.getInstance();
	ValidationAdapter adapter = (ValidationAdapter) factory.adapt((INodeNotifier) ir);
	if (adapter == null)
	return; // error

	if (reporter != null) {
	HTMLValidationReporter rep = null;
	rep = getReporter(reporter, file, (IDOMModel) model);
	rep.clear();
	adapter.setReporter(rep);

	String fileName = ""; //$NON-NLS-1$
	IPath filePath = file.getFullPath();
	if (filePath != null) {
	fileName = filePath.toString();
	}
	String args[] = new String[]{fileName};

	Message mess = new LocalizedMessage(IMessage.LOW_SEVERITY, NLS.bind(HTMLUIMessages.MESSAGE_HTML_VALIDATION_MESSAGE_UI_, args));
	mess.setParams(args);
	reporter.displaySubtask(this, mess);
	}
	adapter.validate(ir);
	}
	}
	finally {
	if (model != null)
	model.releaseFromRead();
	}
	}

	private IndexedRegion getCoveringNode(IRegion dirtyRegion) {

	IndexedRegion largestRegion = null;
	if(fDocument instanceof IStructuredDocument) {
	IStructuredModel sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
	try {
	if(sModel != null) {
	IStructuredDocumentRegion[] regions = ((IStructuredDocument)fDocument).getStructuredDocumentRegions(dirtyRegion.getOffset(), dirtyRegion.getLength());
	largestRegion = getLargest(regions);
	}
	}
	finally {
	if(sModel != null)
	sModel.releaseFromRead();
	}
	}
	return largestRegion;
	}
	protected IndexedRegion getLargest(IStructuredDocumentRegion[] sdRegions) {

	if(sdRegions == null \|\| sdRegions.length == 0)
	return null;

	IndexedRegion currentLargest = getCorrespondingNode(sdRegions[0]);
	for (int i = 0; i < sdRegions.length; i++) {
	if(!sdRegions[i].isDeleted()) {
	IndexedRegion corresponding = getCorrespondingNode(sdRegions[i]);

	if(currentLargest instanceof Text)
	currentLargest = corresponding;

	if(corresponding != null) {
	if(!(corresponding instanceof Text)) {
	if (corresponding.getStartOffset() <= currentLargest.getStartOffset()
	&& corresponding.getEndOffset() >= currentLargest.getEndOffset() )
	currentLargest = corresponding;
	}
	}

	}
	}
	return currentLargest;
	}
	protected IndexedRegion getCorrespondingNode(IStructuredDocumentRegion sdRegion) {
	IStructuredModel sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
	IndexedRegion indexedRegion = null;
	try {
	if (sModel != null)
	indexedRegion = sModel.getIndexedRegion(sdRegion.getStart());
	} finally {
	if (sModel != null)
	sModel.releaseFromRead();
	}
	return indexedRegion;
	}

	/**
	* @see org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator
	*/
	public void connect(IDocument document) {
	fDocument = document;
	}

	/**
	* @see org.eclipse.wst.sse.ui.internal.reconcile.validator.ISourceValidator
	*/
	public void disconnect(IDocument document) {
	// don't need to do anything
	}

	/**
	*/
	protected HTMLValidationResult validate(IDOMModel model, IFile file) {
	IProject prj = null;
	if (file != null) {
	prj = file.getProject();
	}
	if ((prj == null) && (model != null)) {
	URIResolver res = model.getResolver();
	if (res != null) {
	prj = res.getProject();
	}
	}
	final WorkbenchReporter reporter = new WorkbenchReporter(prj, new NullProgressMonitor());
	return validate(reporter, file, model);
	}

	/**
	*/
	private HTMLValidationResult validate(IReporter reporter, IFile file, IDOMModel model) {
	if (file == null \|\| model == null)
	return null; // error
	IDOMDocument document = model.getDocument();
	if (document == null)
	return null; // error
	if (!hasHTMLFeature(document))
	return null; // ignore

	INodeAdapterFactory factory = HTMLValidationAdapterFactory.getInstance();
	ValidationAdapter adapter = (ValidationAdapter) factory.adapt(document);
	if (adapter == null)
	return null; // error

	HTMLValidationReporter rep = getReporter(reporter, file, model);
	rep.clear();
	adapter.setReporter(rep);
	if (reporter != null) {
	String fileName = ""; //$NON-NLS-1$
	IPath filePath = file.getFullPath();
	if (filePath != null) {
	fileName = filePath.toString();
	}
	String args[] = new String[]{fileName};

	// Message mess = new Message("HTMLValidation", //$NON-NLS-1$
	// SeverityEnum.LOW_SEVERITY,
	// "MESSAGE_HTML_VALIDATION_MESSAGE_UI_", //$NON-NLS-1$
	// args);
	Message mess = new LocalizedMessage(IMessage.LOW_SEVERITY, NLS.bind(HTMLUIMessages.MESSAGE_HTML_VALIDATION_MESSAGE_UI_, args));
	mess.setParams(args);
	reporter.displaySubtask(this, mess);
	}
	adapter.validate(document);
	return rep.getResult();
	}

	/**
	*/
	private void validateContainer(IValidationContext helper, IReporter reporter, IContainer container) {
	try {
	IResource[] resourceArray = container.members(false);
	for (int i = 0; i < resourceArray.length; i++) {
	IResource resource = resourceArray[i];
	if (resource == null)
	continue;
	if (resource instanceof IFile) {
	validateFile(helper, reporter, (IFile) resource);
	}
	else if (resource instanceof IContainer) {
	validateContainer(helper, reporter, (IContainer) resource);
	}
	}
	}
	catch (CoreException ex) {
	}
	}

	/**
	*/
	private void validateDelta(IValidationContext helper, IReporter reporter) {
	String[] deltaArray = helper.getURIs();
	for (int i = 0; i < deltaArray.length; i++) {
	String delta = deltaArray[i];
	if (delta == null)
	continue;
	IResource resource = getResource(delta);
	if (resource == null \|\| !(resource instanceof IFile))
	continue;
	validateFile(helper, reporter, (IFile) resource);
	}
	}

	/**
	*/
	private void validateFile(IValidationContext helper, IReporter reporter, IFile file) {
	if ((reporter != null) && (reporter.isCancelled() == true)) {
	throw new OperationCanceledException();
	}
	if (!shouldValidate(file)) {
	return;
	}
	IDOMModel model = getModel(file.getProject(), file);
	if (model == null)
	return;

	try {
	validate(reporter, file, model);
	}
	finally {
	releaseModel(model);
	}
	}

	/**
	*/
	private void validateFull(IValidationContext helper, IReporter reporter) {
	IProject project = null;
	String[] fileDelta = helper.getURIs();
	if (helper instanceof IWorkbenchContext) {
	IWorkbenchContext wbHelper = (IWorkbenchContext) helper;
	project = wbHelper.getProject();
	}
	else {
	// won't work for project validation (b/c nothing in file delta)
	project = getResource(fileDelta[0]).getProject();
	}
	if (project == null)
	return;
	validateContainer(helper, reporter, project);
	}

	/*
	* added to get rid or dependency on IWorkbenchHelper
	*
	*/
	public IResource getResource(String delta) {
	return ResourcesPlugin.getWorkspace().getRoot().getFile(new Path(delta));
	}

	public ISchedulingRule getSchedulingRule(IValidationContext helper) {
	return null;
	}

	public IStatus validateInJob(IValidationContext helper, IReporter reporter) throws ValidationException {
	// Exception catching was removed, see
	// https://bugs.eclipse.org/bugs/show_bug.cgi?id=123600
	IStatus status = Status.OK_STATUS;
	validate(helper, reporter);
	return status;
	}
	}