import javax.help.Map.ID; //导入依赖的package包/类
@Override
public void idChanged(HelpModelEvent e) {
    ID id = e.getID();
    URL url = e.getURL();
    TextHelpModel model = theViewer.getModel();
    debug("idChanged(" + e + ")");
    debug("  = " + id + " " + url);
    debug("  my helpModel: " + model);

    model.setDocumentTitle(null);
    /**
     * html future additions
     * if we were doing any highlighting of the search text
     * code would be needed here remove all the highlights before
     * the new page is displayed
     */
    try {
        setPage(url);
    } catch (IOException ex) {
        Exceptions.printStackTrace(ex);
    }

    debug("done with idChanged");
}
 

import javax.help.Map.ID; //导入依赖的package包/类
/**
 * Retrieves the help topic associated with the given node. Note that this also maintains a map
 * of topic id --> topic mappings in the parent help set.
 * 
 * @param node Tree node.
 * @return A help topic instance.
 */
protected HelpTopic getTopic(TreeNode node) {
    try {
        DefaultMutableTreeNode nd = (DefaultMutableTreeNode) node;
        TreeItem item = (TreeItem) nd.getUserObject();
        ID id = item.getID();
        HelpTopic topic = new HelpTopic(id == null ? null : id.getURL(), item.getName(), view.getHelpSet().getTitle());
        
        if (id != null && view.getHelpSet().getKeyData("topics", id.id) == null) {
            view.getHelpSet().setKeyData("topics", id.id, topic);
        }
        
        return topic;
    } catch (MalformedURLException e) {
        return null;
    }
}
 

import javax.help.Map.ID; //导入依赖的package包/类
@Override
public HelpTopic getTopic(String topicId) {
    HelpTopic topic = (HelpTopic) helpSet.getKeyData("topics", topicId);
    
    if (topic != null) {
        return topic;
    }
    
    ID id = ID.create(topicId, helpSet);
    
    try {
        URL url = helpSet.getCombinedMap().getURLFromID(id);
        return new HelpTopic(url, topicId, helpSet.getTitle());
    } catch (Exception e) {
        return null;
    }
}
 

import javax.help.Map.ID; //导入依赖的package包/类
/**
 * Shows this ID as content relative to the (top) HelpSet for the HelpBroker
 * instance--HelpVisitListeners are notified.
 *
 * @param id A string that identifies the topic to show for the loaded (top) HelpSet
 * @exception BadIDException The ID is not valid for the HelpSet
 */
public void setCurrentID(String id) throws BadIDException{
  try{
    setCurrentID(ID.create(id,myHelpSet));
  } catch(InvalidHelpSetContextException ex){
    // this should not happen
    new Error("internal error?");
  }
}
 

import javax.help.Map.ID; //导入依赖的package包/类
/**
 * Determines which ID is displayed (if any).
 */
public ID getCurrentID(){
  if(jhelp!=null){
    return jhelp.getModel().getCurrentID();
  } else{
    return null;
  }
}
 

import javax.help.Map.ID; //导入依赖的package包/类
private void rebuild() {
    debug("rebuild");
    TextHelpModel model = theViewer.getModel();
    if (model == null) {
        debug("rebuild-end: model is null");
        return;
    }

    /**
     * html future additions
     * if we were doing any highlighting the highlights would need
     * to be removed here
     */
    HelpSet hs = model.getHelpSet();
    // for glossary - not set homeID page - glossary is not synchronized
    if (theViewer.getSynch()) {
        try {
            Map.ID homeID = hs.getHomeID();
            Locale locale = hs.getLocale();
            String name = HelpUtilities.getString(locale, "history.homePage");
            model.setCurrentID(homeID, name, (JHelpNavigator) null);
            setPage(model.getCurrentURL());
        } catch (InvalidHelpSetContextException ex) {
            Exceptions.printStackTrace(ex);
        } catch (IOException e) {
            Exceptions.printStackTrace(e);
        }
    }
    debug("rebuild-end");
}
 

import javax.help.Map.ID; //导入依赖的package包/类
public static URL getURLFromID(String id) throws BadIDException,
		MalformedURLException {
	initialize();
	logger.trace("Looking for id: " + id);
	ID theId = ID.create(id, hs);
	if (theId == null)
		return null;
	return hs.getCombinedMap().getURLFromID(theId);
}
 

import javax.help.Map.ID; //导入依赖的package包/类
/**
    * Create an TOCItem with the given data.
    * 
    * @param tagName
    *            The TOC type to create. Valid types are "tocitem". Null or
    *            invalid types will throw an IllegalArgumentException
    * @param atts
    *            Attributes of the Item. Valid attributes are "target",
    *            "image", and "text". A null atts is valid and means no
    *            attributes
    * @param hs
    *            HelpSet this item was created under.
    * @param locale
    *            Locale of this item. A null locale is valid.
    * @returns A fully constructed TreeItem.
    * @throws IllegalArgumentExcetpion
    *             if tagname is null or invalid.
    */
   public TreeItem createMyItem(String target) {

String line, title = "Test";
try {
    InputStream test = jarFile.getInputStream(jarFile.getEntry(target));
    BufferedReader in = new BufferedReader(new InputStreamReader(test));

    if (!in.ready())
	throw new IOException();

    while ((line = in.readLine()) != null) {
	if (line.toLowerCase().contains("title")) {
	    int beginIndex = line.toLowerCase().indexOf("title") + 6;
	    int endIndex = line.toLowerCase().indexOf("</title>");
	    title = line.substring(beginIndex, endIndex);
	    break;
	}
    }

    in.close();
} catch (IOException e) {
}

Map.ID mapID = null;
try {
    mapID = ID.create(target, hs);
} catch (BadIDException bex1) {
}

Map.ID imageMapID = null;
String imageID = "topic.png";
try {
    imageMapID = ID.create(imageID, hs);
} catch (BadIDException bex2) {
}

TOCItem item = new TOCItem(mapID, imageMapID, hs, Locale.getDefault());
item.setName(title);
item.setMergeType("javax.help.AppendMerge");
item.setExpansionType(TreeItem.COLLAPSE);

return item;
   }