protected final void formatChildren(ICSSNode node, IRegion region, StringBuffer source) {
   ICSSNode child = node.getFirstChild();
   int start = region.getOffset();
   int end = region.getOffset() + region.getLength();
   boolean first = true;
   while (child != null) {
     int curEnd = ((IndexedRegion) child).getEndOffset();
     StringBuffer childSource = null;
     boolean toFinish = false;
     if (start < curEnd) {
       int curStart = ((IndexedRegion) child).getStartOffset();
       if (curStart < end) {
         // append child
         CSSSourceFormatter formatter =
             (CSSSourceFormatter) ((INodeNotifier) child).getAdapterFor(CSSSourceFormatter.class);
         if (formatter == null) {
           formatter =
               CSSSourceFormatterFactory.getInstance().getSourceFormatter((INodeNotifier) child);
         }
         if (includes(region, curStart, curEnd))
           childSource = ((AbstractCSSSourceFormatter) formatter).formatProc(child);
         else
           childSource =
               ((AbstractCSSSourceFormatter) formatter)
                   .formatProc(child, overlappedRegion(region, curStart, curEnd));
       } else toFinish = true;
     }
     // append between children
     if (!first) {
       curEnd = ((IndexedRegion) child).getStartOffset(); // change
       // only
       // start
       if (start < curEnd) {
         int curStart = ((IndexedRegion) child.getPreviousSibling()).getEndOffset();
         if (curStart < end) {
           String toAppend = (childSource != null) ? new String(childSource) : ""; // $NON-NLS-1$
           if (includes(region, curStart, curEnd))
             formatBefore(node, child, toAppend, source, null);
           else
             formatBefore(
                 node, child, overlappedRegion(region, curStart, curEnd), toAppend, source);
         }
       }
     }
     if (childSource != null) {
       source.append(childSource);
     }
     first = false;
     if (toFinish) break;
     child = child.getNextSibling();
   }
 }
 protected final void formatChildren(ICSSNode node, StringBuffer source) {
   ICSSNode child = node.getFirstChild();
   boolean first = true;
   while (child != null) {
     // append child
     CSSSourceFormatter formatter =
         (CSSSourceFormatter) ((INodeNotifier) child).getAdapterFor(CSSSourceFormatter.class);
     if (formatter == null) {
       formatter =
           CSSSourceFormatterFactory.getInstance().getSourceFormatter((INodeNotifier) child);
     }
     StringBuffer childSource = ((AbstractCSSSourceFormatter) formatter).formatProc(child);
     if (!first) {
       formatBefore(node, child, new String(childSource), source, null);
     }
     source.append(childSource);
     // append between children
     child = child.getNextSibling();
     first = false;
   }
 }