/**
  * Add the line numbers for the source code.
  *
  * @param pre the content tree to which the line number will be added
  * @param lineno The line number
  */
 private static void addLineNo(Content pre, int lineno) {
   HtmlTree span = new HtmlTree(HtmlTag.SPAN);
   span.addStyle(HtmlStyle.sourceLineNo);
   if (lineno < 10) {
     span.addContent("00" + Integer.toString(lineno));
   } else if (lineno < 100) {
     span.addContent("0" + Integer.toString(lineno));
   } else {
     span.addContent(Integer.toString(lineno));
   }
   pre.addContent(span);
 }
 /**
  * Add the list of classes that use the given package.
  *
  * @param contentTree the content tree to which the class list will be added
  */
 protected void addClassList(Content contentTree) throws IOException {
   String[] classTableHeader =
       new String[] {
         configuration.getText(
             "doclet.0_and_1",
             configuration.getText("doclet.Class"),
             configuration.getText("doclet.Description"))
       };
   Iterator<String> itp = usingPackageToUsedClasses.keySet().iterator();
   while (itp.hasNext()) {
     String packageName = itp.next();
     PackageDoc usingPackage = configuration.root.packageNamed(packageName);
     HtmlTree li = new HtmlTree(HtmlTag.LI);
     li.addStyle(HtmlStyle.blockList);
     if (usingPackage != null) {
       li.addContent(getMarkerAnchor(usingPackage.name()));
     }
     String tableSummary =
         configuration.getText(
             "doclet.Use_Table_Summary", configuration.getText("doclet.classes"));
     Content table =
         HtmlTree.TABLE(
             HtmlStyle.useSummary,
             0,
             3,
             0,
             tableSummary,
             getTableCaption(
                 configuration.getResource(
                     "doclet.ClassUse_Classes.in.0.used.by.1",
                     getPackageLink(pkgdoc, Util.getPackageName(pkgdoc)),
                     getPackageLink(usingPackage, Util.getPackageName(usingPackage)))));
     table.addContent(getSummaryTableHeader(classTableHeader, "col"));
     Content tbody = new HtmlTree(HtmlTag.TBODY);
     Iterator<ClassDoc> itc = usingPackageToUsedClasses.get(packageName).iterator();
     for (int i = 0; itc.hasNext(); i++) {
       HtmlTree tr = new HtmlTree(HtmlTag.TR);
       if (i % 2 == 0) {
         tr.addStyle(HtmlStyle.altColor);
       } else {
         tr.addStyle(HtmlStyle.rowColor);
       }
       addClassRow(itc.next(), packageName, tr);
       tbody.addContent(tr);
     }
     table.addContent(tbody);
     li.addContent(table);
     contentTree.addContent(li);
   }
 }
 /** Generate the package use list. */
 protected void generatePackageUseFile() throws IOException {
   Content body = getPackageUseHeader();
   HtmlTree div = new HtmlTree(HtmlTag.DIV);
   div.addStyle(HtmlStyle.contentContainer);
   if (usingPackageToUsedClasses.isEmpty()) {
     div.addContent(getResource("doclet.ClassUse_No.usage.of.0", pkgdoc.name()));
   } else {
     addPackageUse(div);
   }
   body.addContent(div);
   addNavLinks(false, body);
   addBottom(body);
   printHtmlDocument(null, true, body);
 }
 /**
  * Add the package use information.
  *
  * @param pkg the package that used the given package
  * @param contentTree the content tree to which the information will be added
  */
 protected void addPackageUse(PackageDoc pkg, Content contentTree) throws IOException {
   Content tdFirst =
       HtmlTree.TD(
           HtmlStyle.colFirst,
           getHyperLink(Util.getPackageName(pkg), new StringContent(Util.getPackageName(pkg))));
   contentTree.addContent(tdFirst);
   HtmlTree tdLast = new HtmlTree(HtmlTag.TD);
   tdLast.addStyle(HtmlStyle.colLast);
   if (pkg != null && pkg.name().length() != 0) {
     addSummaryComment(pkg, tdLast);
   } else {
     tdLast.addContent(getSpace());
   }
   contentTree.addContent(tdLast);
 }