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/*******************************************************************************
* Copyright (c) 2009, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.webapp.servlet;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import javax.servlet.http.HttpServletRequest;
import org.eclipse.core.runtime.Path;
import org.eclipse.help.ITopic;
import org.eclipse.help.base.AbstractHelpScope;
import org.eclipse.help.internal.HelpPlugin;
import org.eclipse.help.internal.base.scope.ScopeUtils;
import org.eclipse.help.internal.toc.Toc;
import org.eclipse.help.internal.webapp.data.RequestScope;
import org.eclipse.help.internal.webapp.data.TocData;
import org.eclipse.help.internal.webapp.data.UrlUtil;
public class ChildLinkInserter {
private HttpServletRequest req;
private OutputStream out;
private static final String NO_CHILDREN = "no_child_topics"; //$NON-NLS-1$
private static final String HAS_CHILDREN = "has_child_topics"; //$NON-NLS-1$
private AbstractHelpScope scope;
public ChildLinkInserter(HttpServletRequest req, OutputStream out) {
this.req = req;
this.out = out;
scope = RequestScope.getScope(req, null, false);
}
public void addContents(String encoding) throws IOException {
String path = req.getParameter(TocData.COMPLETE_PATH_PARAM);
ITopic[] subtopics = getSubtopics();
if (subtopics.length == 0) {
return;
}
StringBuilder links = new StringBuilder("\n<ul class=\"childlinks\">\n"); //$NON-NLS-1$
for (int i=0;i<subtopics.length;++i) {
if (ScopeUtils.showInTree(subtopics[i], scope)) {
links.append("\n<li><a href=\""); //$NON-NLS-1$
String href = subtopics[i].getHref();
if (href == null) {
if (path != null && path.length() > 0) {
href = "/../nav/" + path + '_' + i; //$NON-NLS-1$
} else {
href = "nav.html"; //$NON-NLS-1$
}
}
else {
href = XMLGenerator.xmlEscape(href);
if (path != null && path.length() > 0) {
href = TocFragmentServlet.fixupHref(href, path + '_' + i);
}
}
links.append(getBackpath(req.getPathInfo()));
links.append(href);
links.append("\">" + subtopics[i].getLabel() + "</a></li>\n"); //$NON-NLS-1$//$NON-NLS-2$
}
}
links.append("\n</ul>\n"); //$NON-NLS-1$
String linkString = links.toString();
try {
if (encoding != null) {
out.write(linkString.getBytes(encoding));
} else {
out.write(linkString.getBytes(StandardCharsets.UTF_8));
}
} catch (UnsupportedEncodingException e) {
out.write(linkString.getBytes());
}
}
private ITopic[] getSubtopics() {
String locale = UrlUtil.getLocale(req, null);
String pathInfo = req.getPathInfo();
String servletPath = req.getServletPath();
if ("/nav".equals(servletPath)) return new ITopic[0]; //$NON-NLS-1$
Toc[] tocs = HelpPlugin.getTocManager().getTocs(locale);
for (Toc toc : tocs) {
if (pathInfo.equals(toc.getTopic())) {
return toc.getTopics();
}
ITopic topic = toc.getTopic(pathInfo);
if (topic != null) {
return topic.getSubtopics();
}
}
return new ITopic[0];
}
private String getBackpath(String path) {
int num = new Path(path).segmentCount() - 1;
StringBuilder buf = new StringBuilder();
for (int i=0; i < num; ++i) {
if (i > 0) {
buf.append('/');
}
buf.append(".."); //$NON-NLS-1$
}
return buf.toString();
}
public void addStyle() throws IOException {
ITopic[] subtopics = getSubtopics();
for (ITopic subtopic : subtopics) {
if (ScopeUtils.showInTree(subtopic, scope)) {
out.write(HAS_CHILDREN.getBytes(StandardCharsets.UTF_8));
return;
}
}
out.write(NO_CHILDREN.getBytes(StandardCharsets.UTF_8));
}
}
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