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package org.eclipse.wst.html.ui.internal.projection;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.projection.IProjectionListener;
import org.eclipse.jface.text.source.projection.ProjectionViewer;
import org.eclipse.wst.sse.core.INodeNotifier;
import org.eclipse.wst.sse.core.IStructuredModel;
import org.eclipse.wst.sse.core.IndexedRegion;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.PropagatingAdapter;
import org.eclipse.wst.sse.core.internal.model.FactoryRegistry;
import org.eclipse.wst.sse.ui.internal.projection.IStructuredTextFoldingProvider;
import org.eclipse.wst.xml.core.document.IDOMModel;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
/**
* Updates the projection model of a structured model for HTML.
*/
public class StructuredTextFoldingProviderHTML implements IStructuredTextFoldingProvider, IProjectionListener {
private final static boolean debugProjectionPerf = "true".equalsIgnoreCase(Platform.getDebugOption("org.eclipse.wst.html.ui/projectionperf")); //$NON-NLS-1$ //$NON-NLS-2$
private IDocument fDocument;
private ProjectionViewer fViewer;
/**
* Adds an adapter to node and its children
*
* @param node
* @param level
*/
private void addAdapterToNodeAndChildren(Node node, int level) {
if (node instanceof INodeNotifier) {
INodeNotifier notifier = (INodeNotifier) node;
// try and get the adapter for the current node and update the
// adapter with projection information
ProjectionModelNodeAdapterHTML adapter = (ProjectionModelNodeAdapterHTML) notifier.getExistingAdapter(ProjectionModelNodeAdapterHTML.class);
if (adapter != null) {
adapter.updateAdapter(node);
}
else {
// just call getadapter so the adapter is created and
// automatically initialized
notifier.getAdapterFor(ProjectionModelNodeAdapterHTML.class);
}
Node nextChild = node.getFirstChild();
while (nextChild != null) {
Node childNode = nextChild;
nextChild = childNode.getNextSibling();
addAdapterToNodeAndChildren(childNode, level + 1);
}
}
}
/**
* Goes through every node and adds an adapter onto each for tracking
* purposes
*/
private void addAllAdapters() {
long start = System.currentTimeMillis();
IStructuredModel sModel = null;
try {
sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
if (sModel != null) {
int startOffset = 0;
IndexedRegion startNode = sModel.getIndexedRegion(startOffset);
if (startNode instanceof Node) {
int level = 0;
Node nextSibling = (Node) startNode;
while (nextSibling != null) {
Node currentNode = nextSibling;
nextSibling = currentNode.getNextSibling();
addAdapterToNodeAndChildren(currentNode, level);
}
}
}
}
finally {
if (sModel != null) {
sModel.releaseFromRead();
}
}
long end = System.currentTimeMillis();
if (debugProjectionPerf)
System.out.println("StructuredTextFoldingProviderHTML.addAllAdapters: " + (end - start)); //$NON-NLS-1$
}
/**
* Get the ProjectionModelNodeAdapterFactoryHTML to use with this
* provider.
*
* @return ProjectionModelNodeAdapterFactoryHTML
*/
private ProjectionModelNodeAdapterFactoryHTML getAdapterFactory(boolean createIfNeeded) {
long start = System.currentTimeMillis();
ProjectionModelNodeAdapterFactoryHTML factory = null;
IStructuredModel sModel = null;
try {
sModel = StructuredModelManager.getModelManager().getExistingModelForRead(fDocument);
if (sModel != null) {
FactoryRegistry factoryRegistry = sModel.getFactoryRegistry();
// getting the projectionmodelnodeadapter for the first time
// so do some initializing
if (!factoryRegistry.contains(ProjectionModelNodeAdapterHTML.class) && createIfNeeded) {
ProjectionModelNodeAdapterFactoryHTML newFactory = new ProjectionModelNodeAdapterFactoryHTML();
// add factory to factory registry
factoryRegistry.addFactory(newFactory);
// add factory to propogating adapter
IDOMModel domModel = (IDOMModel) sModel;
Document document = domModel.getDocument();
PropagatingAdapter propagatingAdapter = (PropagatingAdapter) ((INodeNotifier) document).getAdapterFor(PropagatingAdapter.class);
if (propagatingAdapter != null) {
propagatingAdapter.addAdaptOnCreateFactory(newFactory);
}
}
// try and get the factory
factory = (ProjectionModelNodeAdapterFactoryHTML) factoryRegistry.getFactoryFor(ProjectionModelNodeAdapterHTML.class);
}
}
finally {
if (sModel != null)
sModel.releaseFromRead();
}
long end = System.currentTimeMillis();
if (debugProjectionPerf)
System.out.println("StructuredTextFoldingProviderHTML.getAdapterFactory: " + (end - start)); //$NON-NLS-1$
return factory;
}
/**
* Initialize this provider with the correct document. Assumes projection
* is enabled. (otherwise, only install would have been called)
*/
public void initialize() {
if (!isInstalled())
return;
// set projection viewer to null on old document's adapter factory
ProjectionModelNodeAdapterFactoryHTML factory = getAdapterFactory(false);
if (factory != null) {
factory.setProjectionViewer(null);
}
// clear out all annotations
if (fViewer.getProjectionAnnotationModel() != null)
fViewer.getProjectionAnnotationModel().removeAllAnnotations();
fDocument = fViewer.getDocument();
if (fDocument != null) {
// set projection viewer on new document's adapter factory
factory = getAdapterFactory(true);
if (factory != null) {
factory.setProjectionViewer(fViewer);
}
addAllAdapters();
}
}
/**
* Associate a ProjectionViewer with this IStructuredTextFoldingProvider
*
* @param viewer
*/
public void install(ProjectionViewer viewer) {
// uninstall before trying to install new viewer
if (isInstalled()) {
uninstall();
}
fViewer = viewer;
fViewer.addProjectionListener(this);
}
private boolean isInstalled() {
return fViewer != null;
}
public void projectionDisabled() {
ProjectionModelNodeAdapterFactoryHTML factory = getAdapterFactory(false);
if (factory != null) {
factory.setProjectionViewer(null);
}
fDocument = null;
}
public void projectionEnabled() {
initialize();
}
/**
* Disconnect this IStructuredTextFoldingProvider from projection viewer
*/
public void uninstall() {
if (isInstalled()) {
projectionDisabled();
fViewer.removeProjectionListener(this);
fViewer = null;
}
}
}
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