javax.help.tagext.IndexItemTag Maven / Gradle / Ivy
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/*
* @(#)IndexItemTag.java 1.4 06/10/30
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package javax.help.tagext;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.*;
import java.io.*;
import java.net.URL;
import java.net.MalformedURLException;
import javax.help.HelpBroker;
import javax.help.HelpSet;
import javax.help.Map;
import javax.help.Map.ID;
import javax.help.Merge;
import javax.help.MergeHelpUtilities;
import javax.help.NavigatorView;
import javax.help.IndexItem;
import javax.help.IndexView;
import javax.help.SortMerge;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeNode;
/**
* The JSP tag class for an IndexItem
*
* @author Roger D. Brinkley
* @version 1.4 10/30/06
* @see javax.help.IndexItem
*/
public class IndexItemTag extends BodyTagSupport {
private Enumeration treeEnum;
private DefaultMutableTreeNode topNode;
private String baseID="root";
private HelpBroker hb;
private IndexView view=null;
public void setIndexView(IndexView view) {
this.view = view;
}
public void setBaseID(String baseID) {
this.baseID = baseID;
}
public void setHelpBroker(HelpBroker hb) {
this.hb = hb;
}
private void initialize() {
if (view == null) {
return;
}
topNode = view.getDataAsTree();
treeEnum = topNode.preorderEnumeration();
String mergeType = view.getMergeType();
HelpSet hs = view.getHelpSet();
Locale locale = hs.getLocale();
// Make sure the children are all handled correctly
MergeHelpUtilities.mergeNodeChildren(mergeType, topNode);
// add all the subhelpsets
addSubHelpSets(hs);
}
/** Adds subhelpsets
*
* @param hs The HelpSet which subhelpsets will be added
*/
private void addSubHelpSets(HelpSet hs){
for( Enumeration e = hs.getHelpSets(); e.hasMoreElements(); ) {
HelpSet ehs = (HelpSet) e.nextElement();
if (ehs == null) {
continue;
}
// merge views
NavigatorView[] views = ehs.getNavigatorViews();
for(int i = 0; i < views.length; i++){
if (views[i] instanceof IndexView) {
Merge mergeObject =
Merge.DefaultMergeFactory.getMerge(view, views[i]);
if (mergeObject != null) {
mergeObject.processMerge(topNode);
}
}
}
addSubHelpSets( ehs );
}
}
public int doStartTag() {
initialize();
if(treeEnum.hasMoreElements()) {
DefaultMutableTreeNode node =
(DefaultMutableTreeNode) treeEnum.nextElement();
// never use the top node. It is just the container node
if (node == topNode) {
try {
node = (DefaultMutableTreeNode) treeEnum.nextElement();
} catch (NoSuchElementException e) {
return SKIP_BODY;
}
}
setNodeAttributes(node);
return EVAL_BODY_TAG;
}
else {
return SKIP_BODY;
}
}
public int doAfterBody() throws JspException {
BodyContent body = getBodyContent();
try {
body.writeOut(getPreviousOut());
} catch (IOException e) {
throw new JspTagException("IndexItemTag: " + e.getMessage());
}
// clear up so the next time the body content is empty
body.clearBody();
if (treeEnum.hasMoreElements()) {
DefaultMutableTreeNode node =
(DefaultMutableTreeNode) treeEnum.nextElement();
setNodeAttributes(node);
return EVAL_BODY_TAG;
} else {
return SKIP_BODY;
}
}
private void setNodeAttributes(DefaultMutableTreeNode node) {
IndexItem item = (IndexItem) node.getUserObject();
pageContext.setAttribute("name", item.getName());
String helpID = "";
if (item.getID() != null) {
helpID = item.getID().id;
}
pageContext.setAttribute("helpID", helpID);
pageContext.setAttribute("parent", Integer.toHexString(node.getParent().hashCode()));
String id = getID(node.getParent());
pageContext.setAttribute("parentID", id);
pageContext.setAttribute("node", Integer.toHexString(node.hashCode()));
id = getID(node);
pageContext.setAttribute("nodeID", id);
String content = getContentURL(item);
pageContext.setAttribute("contentURL", content);
String expansionType = Integer.toString(item.getExpansionType());
pageContext.setAttribute("expansionType", expansionType);
}
private String getID(TreeNode node) {
if (node == topNode) {
return baseID;
}
TreeNode parent = node.getParent();
if (parent == null) {
return "";
}
String id = getID(parent);
id = id.concat("." + Integer.toString(parent.getIndex(node)));
return id;
}
/**
* return the content URL in String form for a given IndexItem
*
* returns an empty String if no content exists.
*/
private String getContentURL(IndexItem item) {
URL url = null;
ID id = item.getID();
if (id != null) {
HelpSet hs = id.hs;
Map map = hs.getLocalMap();
try {
url = map.getURLFromID(id);
} catch (MalformedURLException e) {
// just ignore
}
}
if (url == null) {
return "";
}
return url.toExternalForm();
}
}