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Diffstat (limited to 'bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/DOMObserver.java')
| -rw-r--r-- | bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/DOMObserver.java | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/DOMObserver.java b/bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/DOMObserver.java deleted file mode 100644 index b70f63b2f6..0000000000 --- a/bundles/org.eclipse.wst.xml.ui/src/org/eclipse/wst/xml/ui/internal/DOMObserver.java +++ /dev/null @@ -1,189 +0,0 @@ -/******************************************************************************* - * 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.internal; - - -import java.util.Timer; -import java.util.TimerTask; - -import org.eclipse.wst.sse.core.INodeAdapter; -import org.eclipse.wst.sse.core.INodeNotifier; -import org.eclipse.wst.sse.core.IStructuredModel; -import org.eclipse.wst.xml.core.document.IDOMModel; -import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.CMDocumentManager; -import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.ModelQuery; -import org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader; -import org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.InferredGrammarBuildingCMDocumentLoader; -import org.eclipse.wst.xml.core.internal.modelquery.ModelQueryUtil; -import org.w3c.dom.Document; -import org.w3c.dom.Element; -import org.w3c.dom.Node; - - -/** - * This class is used to observe changes in the DOM and perform - * occasional'scans' to deduce information. We use a delay timer mechanism to - * ensure scans are made every couple of seconds to avoid performance - * problems. Currently this class is used to keep track of referenced grammar - * uri's within the document ensure that they are loaded by the - * CMDocumentManager. We might want to generalize this class to perform other - * suplimental information gathering that is suitable for 'time delayed' - * computation (error hints etc.). - */ -// TODO: Where should this class go? -public class DOMObserver { - - - // An abstract adapter that ensures that the children of a new Node are - // also adapted - // - abstract class DocumentAdapter implements INodeAdapter { - public DocumentAdapter(Document document) { - ((INodeNotifier) document).addAdapter(this); - adapt(document.getDocumentElement()); - } - - public void adapt(Element element) { - if (element != null) { - if (((INodeNotifier) element).getExistingAdapter(this) == null) { - ((INodeNotifier) element).addAdapter(this); - - for (Node child = element.getFirstChild(); child != null; child = child.getNextSibling()) { - if (child.getNodeType() == Node.ELEMENT_NODE) { - adapt((Element) child); - } - } - } - } - } - - public boolean isAdapterForType(Object type) { - return type == this; - } - - abstract public void notifyChanged(INodeNotifier notifier, int eventType, Object feature, Object oldValue, Object newValue, int index); - } - - /** - * This class listens to the changes in the CMDocument and triggers a - * CMDocument load - */ - class MyDocumentAdapter extends DocumentAdapter { - MyDocumentAdapter(Document document) { - super(document); - } - - public void notifyChanged(INodeNotifier notifier, int eventType, Object feature, Object oldValue, Object newValue, int index) { - switch (eventType) { - case INodeNotifier.ADD : { - if (newValue instanceof Element) { - // System.out.println("ADD (to " + - // ((Node)notifier).getNodeName() + ") " + - // ((Element)newValue).getNodeName() + " old " + - // oldValue); - adapt((Element) newValue); - } - break; - } - // case INodeNotifier.REMOVE: - case INodeNotifier.CHANGE : - case INodeNotifier.STRUCTURE_CHANGED : - case INodeNotifier.CONTENT_CHANGED : { - Node node = (Node) notifier; - if (node.getNodeType() == Node.ELEMENT_NODE) { - Element element = (Element) node; - switch (eventType) { - case INodeNotifier.CHANGE : { - invokeDelayedCMDocumentLoad(); - break; - } - case INodeNotifier.STRUCTURE_CHANGED : { - // structure change - invokeDelayedCMDocumentLoad(); - break; - } - case INodeNotifier.CONTENT_CHANGED : { - // some content changed - break; - } - } - } - else if (node.getNodeType() == Node.DOCUMENT_NODE) { - invokeDelayedCMDocumentLoad(); - } - break; - } - } - } - } - - class MyTimerTask extends TimerTask { - public MyTimerTask() { - super(); - timerTaskCount++; - } - - public void run() { - timerTaskCount--; - if (timerTaskCount == 0) { - invokeCMDocumentLoad(); - } - } - } - - protected static Timer timer = new Timer(true); - protected Document document; - protected boolean isGrammarInferenceEnabled; - protected IStructuredModel model; - protected int timerTaskCount = 0; - - public DOMObserver(IStructuredModel model) { - this.document = (model instanceof IDOMModel) ? ((IDOMModel) model).getDocument() : null; - - if (document != null) { - ModelQuery modelQuery = ModelQueryUtil.getModelQuery(document); - if (modelQuery != null && modelQuery.getCMDocumentManager() != null) { - CMDocumentManager cmDocumentManager = modelQuery.getCMDocumentManager(); - cmDocumentManager.setPropertyEnabled(CMDocumentManager.PROPERTY_AUTO_LOAD, false); - } - - MyDocumentAdapter myDocumentAdapter = new MyDocumentAdapter(document); - } - } - - public void init() { - // CS: we seem to expose an XSD initialization problem when we do this - // immediately - // very nasty... I need to revist this problem with Ed Merks - // - // invokeCMDocumentLoad(); - invokeDelayedCMDocumentLoad(); - } - - public void invokeCMDocumentLoad() { - ModelQuery modelQuery = ModelQueryUtil.getModelQuery(document); - if (modelQuery != null && modelQuery.getCMDocumentManager() != null) { - CMDocumentLoader loader = isGrammarInferenceEnabled ? new InferredGrammarBuildingCMDocumentLoader(document, modelQuery) : new CMDocumentLoader(document, modelQuery); - loader.loadCMDocuments(); - } - } - - public void invokeDelayedCMDocumentLoad() { - // Display.getCurrent().timerExec(2000, new MyTimerTask()); - timer.schedule(new MyTimerTask(), 2000); - } - - public void setGrammarInferenceEnabled(boolean isEnabled) { - isGrammarInferenceEnabled = isEnabled; - } -} |