/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.preview;
import java.util.List;
import org.eclipse.core.resources.IProject;
import org.eclipse.jst.pagedesigner.IHTMLConstants;
import org.eclipse.jst.pagedesigner.dtresourceprovider.DTSkinManager;
import org.eclipse.jst.pagedesigner.dtresourceprovider.IDTSkin;
import org.eclipse.jst.pagedesigner.jsp.core.pagevar.IPageVariablesProvider;
import org.eclipse.jst.pagedesigner.jsp.core.pagevar.adapter.IDocumentPageVariableAdapter;
import org.eclipse.jst.pagedesigner.parts.DocumentEditPart;
import org.eclipse.jst.pagedesigner.parts.NodeEditPart;
import org.eclipse.jst.pagedesigner.utils.PreviewUtil;
import org.eclipse.jst.pagedesigner.utils.StructuredModelUtil;
import org.eclipse.wst.html.core.internal.provisional.contenttype.ContentTypeIdForHTML;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
import org.eclipse.wst.xml.core.internal.document.XMLGeneratorImpl;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
import org.eclipse.wst.xml.core.internal.provisional.document.ISourceGenerator;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* @author mengbo
* @version 1.5
*/
public class PreviewHandlerNew {
//private static Logger _log = PDPlugin.getLogger(PreviewHandlerNew.class);
/**
* @param part
* @param result
*/
public static void generatePreview(DocumentEditPart part,
StringBuffer result) {
try {
IProject prj = StructuredModelUtil.getProjectFor(part.getIDOMNode()
.getModel());
PageExpressionContext.initialize(prj);
IDOMDocument doc = (IDOMDocument) part.getIDOMNode();
Object obj = doc.getAdapterFor(IDocumentPageVariableAdapter.class);
if (obj instanceof IPageVariablesProvider) {
((IPageVariablesProvider) obj).refresh();
PageExpressionContext.getCurrent().pushPageVarProvider(
(IPageVariablesProvider) obj);
} else {
PageExpressionContext.getCurrent().pushPageVarProvider(null);
}
// IDOMModel previewModel =
// (IDOMModel)StructuredModelManager.getModelManager().createNewInstance(doc.getModel());
// IDOMDocument previewDoc = previewModel.getDocument();
// CR400625: creating XML model here instead of HTML model. Since
// for HTML model, there are checking enforced
// by WTP to make sure the HTML content model is not invalidated.
// And sometimes, the converted HTML may not fully
// comply with HTML content model.
// Use XML instead to workaround the content model validation.
// CR403449: But if we use XML, then system can't recogonize special
// tag such as "script", "style", they
// support <!-- --> in them.
// So we are still using HTML model, but in TagConverter, we are
// always caling DOMUtil.cloneNodeDeepIgnoreError
// to try to skip the errors.
// Hopefully in later version of SSE, the famous "br" problem is
// fixed, and we won't met error when doing
// deep clone.
// IStructuredModel sModel =
// StructuredModelManager.getModelManager().createUnManagedStructuredModelFor(IContentTypeIdentifier.ContentTypeID_XML);
// FIXME: if is not jsp, should use original contentType, if is jsp,
// should use the corresponding
// content type
IStructuredModel sModel = StructuredModelManager.getModelManager()
.createUnManagedStructuredModelFor(
ContentTypeIdForHTML.ContentTypeID_HTML);
IDOMDocument previewDoc = ((IDOMModel) sModel).getDocument();
PreviewConvertContext context = new PreviewConvertContext(
previewDoc);
ISourceGenerator generator = XMLGeneratorImpl.getInstance();
List subeditparts = part.getChildren();
for (int i = 0, size = subeditparts.size(); i < size; i++) {
NodeEditPart subpart = (NodeEditPart) subeditparts.get(i);
Node node = context.previewConvert(subpart.getIDOMNode());
PreviewUtil.previewNode(node);
appendSkinStyleSheetLinks(node, subpart.getIDOMNode());
if (node != null) {
result.append(generator.generateSource(node));
}
}
sModel.releaseFromEdit();
} finally {
PageExpressionContext.reset();
}
}
private static void appendSkinStyleSheetLinks(Node previewNode, IDOMNode domNode) {
if (previewNode != null && domNode != null) {
Element head = locateHeadElement(previewNode);
if (head != null) {
Document document = head.getOwnerDocument();
if (document != null) {
DTSkinManager skinManager = DTSkinManager.getInstance(domNode);
if (skinManager != null) {
List<IDTSkin> currentSkins = skinManager.getCurrentSkins();
for (IDTSkin currentSkin: currentSkins) {
List<String> styleSheetLocations = currentSkin.getStyleSheetLocations();
for (String styleSheetLocation: styleSheetLocations) {
Element link = document.createElement(IHTMLConstants.TAG_LINK);
link.setAttribute(IHTMLConstants.ATTR_REL, "stylesheet"); //$NON-NLS-1$
link.setAttribute(IHTMLConstants.ATTR_TYPE, "text/css"); //$NON-NLS-1$
link.setAttribute(IHTMLConstants.ATTR_HREF, styleSheetLocation);
head.appendChild(link);
}
}
}
}
}
}
}
private static Element locateHeadElement(Node node) {
Element head = null;
if (node != null && node instanceof Element) {
if (node.getLocalName().equalsIgnoreCase(IHTMLConstants.TAG_HEAD)) {
head = (Element)node;
} else {
NodeList childNodes = node.getChildNodes();
for (int i = 0, len = childNodes.getLength(); i < len; i++) {
head = locateHeadElement(childNodes.item(i));
if (head != null) {
break;
}
}
}
}
return head;
}
}