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/*******************************************************************************
* Copyright (c) 2012 Red Hat 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:
* Alexander Kurtakov - Initial implementation
*******************************************************************************/
package org.eclipse.linuxtools.internal.cdt.libhover.devhelp;
import java.util.ArrayList;
import java.util.List;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.help.ITopic;
import org.eclipse.help.IUAElement;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class SimpleTopic implements ITopic {
private String bookName;
private Node node;
private XPath xpath;
private List<ITopic> subTopics;
public SimpleTopic(String bookName, Node node) {
this.bookName = bookName;
this.node = node;
xpath = XPathFactory.newInstance().newXPath();
subTopics = new ArrayList<>();
initSubtopics();
}
private void initSubtopics() {
NodeList nodes = xpathEvalNodes("sub", node); //$NON-NLS-1$
if (nodes != null) {
for (int i = 0; i < nodes.getLength(); i++) {
Node innerNode = nodes.item(i);
subTopics.add(new SimpleTopic(bookName, innerNode));
}
}
}
private NodeList xpathEvalNodes(String path, Node docroot) {
NodeList result = null;
try {
result = (NodeList) xpath.evaluate(path, docroot,
XPathConstants.NODESET);
} catch (XPathExpressionException e) {
e.printStackTrace();
}
return result;
}
@Override
public boolean isEnabled(IEvaluationContext context) {
return true;
}
@Override
public IUAElement[] getChildren() {
return getSubtopics();
}
@Override
public String getHref() {
String link = ""; //$NON-NLS-1$
try {
link = xpath.evaluate("@link", node); //$NON-NLS-1$
} catch (XPathExpressionException e) {
e.printStackTrace();
}
return "/" + DevHelpPlugin.PLUGIN_ID + "/" + bookName + "/" + link; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
@Override
public String getLabel() {
try {
return xpath.evaluate("@name", node); //$NON-NLS-1$
} catch (XPathExpressionException e) {
e.printStackTrace();
}
return ""; //$NON-NLS-1$
}
@Override
public ITopic[] getSubtopics() {
return subTopics.toArray(new ITopic[subTopics.size()]);
}
}
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