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/*******************************************************************************
* Copyright (c) 2005 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.jst.jsp.ui.internal.projection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.projection.ProjectionViewer;
import org.eclipse.wst.html.core.internal.provisional.HTML40Namespace;
import org.eclipse.wst.sse.core.internal.provisional.AbstractAdapterFactory;
import org.eclipse.wst.sse.core.internal.provisional.INodeAdapter;
import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
import org.w3c.dom.Node;
public class ProjectionModelNodeAdapterFactoryHTML extends AbstractAdapterFactory {
// copies of this class located in:
// org.eclipse.wst.html.ui.internal.projection
// org.eclipse.jst.jsp.ui.internal.projection
/**
* List of projection viewers currently associated with this projection
* model node adapter factory.
*/
private HashMap fProjectionViewers;
public ProjectionModelNodeAdapterFactoryHTML(Object adapterKey, boolean registerAdapters) {
super(adapterKey, registerAdapters);
}
public ProjectionModelNodeAdapterFactoryHTML(Object adapterKey) {
super(adapterKey);
}
public ProjectionModelNodeAdapterFactoryHTML() {
this(ProjectionModelNodeAdapterHTML.class);
}
/**
* Actually creates an adapter for the parent of target if target is the
* "adapt-able" node
*/
protected INodeAdapter createAdapter(INodeNotifier target) {
if ((isActive()) && (target instanceof Node) && ((Node) target).getNodeType() == Node.ELEMENT_NODE) {
Node node = (Node) target;
if (isNodeProjectable(node)) {
// actually work with the parent node to listen for add,
// delete events
Node parent = node.getParentNode();
if (parent instanceof INodeNotifier) {
INodeNotifier parentNotifier = (INodeNotifier) parent;
ProjectionModelNodeAdapterHTML parentAdapter = (ProjectionModelNodeAdapterHTML) parentNotifier.getExistingAdapter(ProjectionModelNodeAdapterHTML.class);
if (parentAdapter == null) {
// create a new adapter for parent
parentAdapter = new ProjectionModelNodeAdapterHTML(this);
parentNotifier.addAdapter(parentAdapter);
}
// call update on parent because a new node has just been
// added
parentAdapter.updateAdapter(parent);
}
}
}
return null;
}
/**
* Returns true if node is a node type able to fold
*
* @param node
* @return boolean true if node is projectable, false otherwise
*/
boolean isNodeProjectable(Node node) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
String tagName = node.getNodeName();
// node is only projectable if it is head, body, script, style,
// table, ul, ol tags
if (HTML40Namespace.ElementName.HEAD.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.BODY.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.SCRIPT.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.STYLE.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.TABLE.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.UL.equalsIgnoreCase(tagName) || HTML40Namespace.ElementName.OL.equalsIgnoreCase(tagName))
return true;
}
return false;
}
/**
* Return true if this factory is currently actively managing projection
*
* @return
*/
boolean isActive() {
return (fProjectionViewers != null && !fProjectionViewers.isEmpty());
}
/**
* Updates projection annotation model if document is not in flux.
* Otherwise, queues up the changes to be applied when document is ready.
*
* @param node
* @param deletions
* @param additions
* @param modifications
*/
void queueAnnotationModelChanges(Node node, Annotation[] deletions, Map additions, Annotation[] modifications) {
queueAnnotationModelChanges(node, deletions, additions, modifications, null);
}
/**
* Updates projection annotation model for a specific projection viewer if
* document is not in flux. Otherwise, queues up the changes to be applied
* when document is ready.
*
* @param node
* @param deletions
* @param additions
* @param modifications
* @param viewer
*/
void queueAnnotationModelChanges(Node node, Annotation[] deletions, Map additions, Annotation[] modifications, ProjectionViewer viewer) {
// create a change object for latest change and add to queue
ProjectionAnnotationModelChanges newChange = new ProjectionAnnotationModelChanges(node, deletions, additions, modifications);
if (fProjectionViewers != null) {
if (viewer != null) {
ProjectionViewerInformation info = (ProjectionViewerInformation) fProjectionViewers.get(viewer);
if (info != null) {
info.queueAnnotationModelChanges(newChange);
}
}
else {
Iterator infos = fProjectionViewers.values().iterator();
while (infos.hasNext()) {
ProjectionViewerInformation info = (ProjectionViewerInformation) infos.next();
info.queueAnnotationModelChanges(newChange);
}
}
}
}
public void release() {
// go through every projectionviewer and call
// removeProjectionViewer(viewer);
if (fProjectionViewers != null) {
Iterator infos = fProjectionViewers.values().iterator();
while (infos.hasNext()) {
ProjectionViewerInformation info = (ProjectionViewerInformation) infos.next();
info.dispose();
infos.remove();
}
fProjectionViewers = null;
}
super.release();
}
/**
* Adds viewer to list of projection viewers this factory is associated
* with
*
* @param viewer -
* assumes viewer's document and projection annotation model
* are not null
*/
void addProjectionViewer(ProjectionViewer viewer) {
// remove old entry if it exists
removeProjectionViewer(viewer);
if (fProjectionViewers == null) {
fProjectionViewers = new HashMap();
}
// create new object containing projection viewer and its info
ProjectionViewerInformation info = new ProjectionViewerInformation(viewer);
fProjectionViewers.put(viewer, info);
info.initialize();
}
/**
* Removes the given viewer from the list of projection viewers this
* factor is associated with
*
* @param viewer
*/
void removeProjectionViewer(ProjectionViewer viewer) {
if (fProjectionViewers != null) {
// remove entry from list of viewers
ProjectionViewerInformation info = (ProjectionViewerInformation) fProjectionViewers.remove(viewer);
if (info != null) {
info.dispose();
}
// if removing last projection viewer, clear out everything
if (fProjectionViewers.isEmpty()) {
fProjectionViewers = null;
}
}
}
}
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