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/*******************************************************************************
* 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.converter;
import java.util.Set;
import org.eclipse.jst.pagedesigner.IHTMLConstants;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.jst.pagedesigner.dtmanager.DTManager;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* @author mengbo
* @version 1.5
*/
public class ConverterUtil {
/**
*
* @param source
* @param dest
* @param ignore
*/
public static void copyAllAttributes(Element source, Element dest,
Set ignore) {
NamedNodeMap attrs = source.getAttributes();
for (int i = 0, size = attrs.getLength(); i < size; i++) {
Attr attr = (Attr) attrs.item(i);
if (ignore == null || !ignore.contains(attr.getName())) {
dest.setAttribute(attr.getName(), attr.getValue());
}
}
}
/**
* copy a single attribute (if exist)
*
* @param source
* @param srcattr
* @param dest
* @param destattr
*/
public static void copyAttribute(Element source, String srcattr,
Element dest, String destattr) {
Attr attr = source.getAttributeNode(srcattr);
if (attr != null) {
dest.setAttribute(destattr, attr.getValue());
}
}
/**
* @param hostElement
* @return true if hostElement represents an empty container
*/
public static boolean isEmptyContainer(Element hostElement) {
NodeList nl = hostElement.getChildNodes();
if (nl == null || nl.getLength() == 0) {
return true;
}
for (int i = 0, n = nl.getLength(); i < n; i++) {
Node node = nl.item(i);
if (!(node instanceof IDOMText)) {
return false;
}
if (!((IDOMText) node).isElementContentWhitespace()) {
return false;
}
}
return true;
}
/**
* @param document
* @param text
* @return the description element in the document containing text
*/
public static Element createDescriptionElement(IDOMDocument document,
String text) {
if (document == null) {
return null;
}
Element span = document.createElement(IHTMLConstants.TAG_SPAN);
span.setAttribute(
"style", "color:gray;font-style:italic;font-size:normal;"); //$NON-NLS-1$ //$NON-NLS-2$
if (text == null) {
span.appendChild(document.createTextNode(PDPlugin
.getResourceString("ConverterUtil.Description"))); //$NON-NLS-1$
} else {
span.appendChild(document.createTextNode(text));
}
return span;
}
/**
* Method to find the resulting converted tag containing a given
* source element. The converted element that will be
* the parent tag is returned so the caller can then determine
* if the parent is part of a table, header, body, footer, row,
* cell, or some other element.
*
* @param srcElem the source element to test.
* @param childElem a child of the source element (used by a
* recursive call to handle special case where
* it was moved up a level to the child model
* list of the grandparent).
* @return a converted element of the type that will contain the
* source element.
*/
static Node findConvertedParentElement(Element srcElem, Element childElem) {
Node parent = srcElem.getParentNode();
if ((parent == null) || !(parent instanceof Element)) {
return null;
}
String name = parent.getNodeName();
if (IHTMLConstants.TAG_HTML.equalsIgnoreCase(name)
|| IHTMLConstants.TAG_BODY.equalsIgnoreCase(name)) {
return null;
}
ITagConverter converter = createTagConverter((Element) parent);
if (!converter.isVisualByHTML()) {
return null;
}
converter.convertRefresh(null);
ConvertPosition position = null;
if (childElem != null) {
// If a child node (grand child of current parent) was
// passed in, check for its position. It may have been
// moved up a level to child model list of the current
// parent. In JSF this is done with a header or
// footer facet tag in a column tag for a dataTable.
position = converter.getChildVisualPosition(childElem);
}
if (position == null) {
position = converter.getChildVisualPosition(srcElem);
}
if (position != null) {
// return the node that will contain the visual
// child and then the caller can check to see if this
// element is table mark-up.
return position.getParentNode();
}
// The current source element is not in the child model
// list for the converted parent so recurse to next
// ancestor and pass source element to see if it has been
// moved up a level as child model of the grandparent.
return findConvertedParentElement((Element) parent, srcElem);
}
private static ITagConverter createTagConverter(Element ele) {
return DTManager.getInstance().getTagConverter(ele,
IConverterFactory.MODE_DESIGNER, null);
}
}
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