content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  
  // Sep 14, 2000:
  //  Fixed serializer to report IO exception directly, instead at
  //  the end of document processing.
  //  Reported by Patrick Higgins <phiggins@transzap.com>
  // Aug 21, 2000:
  //  Fixed bug in startDocument not calling prepare.
  //  Reported by Mikael Staldal <d96-mst-ingen-reklam@d.kth.se>
  // Aug 21, 2000:
  //  Added ability to omit DOCTYPE declaration.
  // Sep 1, 2000:
  //   If no output format is provided the serializer now defaults
  //   to ISO-8859-1 encoding. Reported by Mikael Staldal
  //   <d96-mst@d.kth.se>
  
  
  package mf.org.apache.xml.serialize;
  
  import org.xml.sax.AttributeList;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.Writer;
  import java.util.Iterator;
  import java.util.Locale;
  import java.util.Map;
  
  import mf.org.apache.xerces.dom.DOMMessageFormatter;
  import mf.org.w3c.dom.Attr;
  import mf.org.w3c.dom.Element;
  import mf.org.w3c.dom.NamedNodeMap;
  import mf.org.w3c.dom.Node;
  
  
  /**
   * Implements an HTML/XHTML serializer supporting both DOM and SAX
   * pretty serializing. HTML/XHTML mode is determined in the
   * constructor.  For usage instructions see {@link Serializer}.
   * <p/>
   * If an output stream is used, the encoding is taken from the
   * output format (defaults to <tt>UTF-8</tt>). If a writer is
   * used, make sure the writer uses the same encoding (if applies)
   * as specified in the output format.
   * <p/>
   * The serializer supports both DOM and SAX. DOM serializing is done
   * by calling {@link #serialize} and SAX serializing is done by firing
   * SAX events and using the serializer as a document handler.
   * <p/>
   * If an I/O exception occurs while serializing, the serializer
   * will not throw an exception directly, but only throw it
   * at the end of serializing (either DOM or SAX's {@link
   * org.xml.sax.DocumentHandler#endDocument}.
   * <p/>
   * For elements that are not specified as whitespace preserving,
   * the serializer will potentially break long text lines at space
   * boundaries, indent lines, and serialize elements on separate
   * lines. Line terminators will be regarded as spaces, and
   * spaces at beginning of line will be stripped.
   * <p/>
   * XHTML is slightly different than HTML:
   * <ul>
   * <li>Element/attribute names are lower case and case matters
   * <li>Attributes must specify value, even if empty string
   * <li>Empty elements must have '/' in empty tag
   * <li>Contents of SCRIPT and STYLE elements serialized as CDATA
   * </ul>
   *
   * @author <a href="mailto:arkin@intalio.com">Assaf Arkin</a>
   * @version $Revision: 704573 $ $Date: 2008-10-14 12:11:22 -0400 (Tue, 14 Oct 2008) $
   * @see Serializer
   * @deprecated This class was deprecated in Xerces 2.6.2. It is
   * recommended that new applications use JAXP's Transformation API
   * for XML (TrAX) for serializing HTML. See the Xerces documentation
   * for more information.
   */
  @Deprecated
  public class HTMLSerializer
          extends BaseMarkupSerializer {
  
  
      public static final String XHTMLNamespace = "http://www.w3.org/1999/xhtml";
      /**
       * True if serializing in XHTML format.
       */
      private boolean _xhtml;
      // for users to override XHTMLNamespace if need be.
      private String fUserXHTMLNamespace = null;
  
  
      /**
       * Constructs a new HTML/XHTML serializer depending on the value of
       * <tt>xhtml</tt>. The serializer cannot be used without calling
       * {@link #setOutputCharStream} or {@link #setOutputByteStream} first.
       *
       * @param xhtml True if XHTML serializing
       */
      protected HTMLSerializer(boolean xhtml, OutputFormat format) {
          super(format);
          _xhtml = xhtml;
      }
  
  
      /**
       * Constructs a new serializer. The serializer cannot be used without
       * calling {@link #setOutputCharStream} or {@link #setOutputByteStream}
       * first.
       */
      public HTMLSerializer() {
          this(false, new OutputFormat(Method.HTML, "ISO-8859-1", false));
      }
  
  
      /**
       * Constructs a new serializer. The serializer cannot be used without
       * calling {@link #setOutputCharStream} or {@link #setOutputByteStream}
       * first.
       */
      public HTMLSerializer(OutputFormat format) {
          this(false, format != null ? format : new OutputFormat(Method.HTML, "ISO-8859-1", false));
      }
  
  
      /**
       * Constructs a new serializer that writes to the specified writer
       * using the specified output format. If <tt>format</tt> is null,
       * will use a default output format.
       *
       * @param writer The writer to use
       * @param format The output format to use, null for the default
       */
      public HTMLSerializer(Writer writer, OutputFormat format) {
          this(false, format != null ? format : new OutputFormat(Method.HTML, "ISO-8859-1", false));
          setOutputCharStream(writer);
      }
  
  
      /**
       * Constructs a new serializer that writes to the specified output
       * stream using the specified output format. If <tt>format</tt>
       * is null, will use a default output format.
       *
       * @param output The output stream to use
       * @param format The output format to use, null for the default
       */
      public HTMLSerializer(OutputStream output, OutputFormat format) {
          this(false, format != null ? format : new OutputFormat(Method.HTML, "ISO-8859-1", false));
          setOutputByteStream(output);
      }
  
  
      @Override
      public void setOutputFormat(OutputFormat format) {
          super.setOutputFormat(format != null ? format : new OutputFormat(Method.HTML, "ISO-8859-1", false));
      }
  
      // Set  value for alternate XHTML namespace.
      public void setXHTMLNamespace(String newNamespace) {
          fUserXHTMLNamespace = newNamespace;
      } // setXHTMLNamespace(String)
  
      //-----------------------------------------//
      // SAX content handler serializing methods //
      //-----------------------------------------//
  
  
      @Override
      public void startElement(String namespaceURI, String localName,
                               String rawName, Attributes attrs)
              throws SAXException {
          int i;
          boolean preserveSpace;
          ElementState state;
          String name;
          String value;
          String htmlName;
          boolean addNSAttr = false;
  
          try {
              if (_printer == null)
                  throw new IllegalStateException(
                          DOMMessageFormatter.formatMessage(
                                  DOMMessageFormatter.SERIALIZER_DOMAIN,
                                  "NoWriterSupplied", null));
  
              state = getElementState();
              if (isDocumentState()) {
                  // If this is the root element handle it differently.
                  // If the first root element in the document, serialize
                  // the document's DOCTYPE. Space preserving defaults
                  // to that of the output format.
                  if (!_started)
                      startDocument((localName == null || localName.length() == 0)
                              ? rawName : localName);
              } else {
                  // For any other element, if first in parent, then
                  // close parent's opening tag and use the parnet's
                  // space preserving.
                  if (state.empty)
                      _printer.printText('>');
                  // Indent this element on a new line if the first
                  // content of the parent element or immediately
                  // following an element.
                  if (_indenting && !state.preserveSpace &&
                          (state.empty || state.afterElement))
                      _printer.breakLine();
              }
              preserveSpace = state.preserveSpace;
  
              // Do not change the current element state yet.
              // This only happens in endElement().
  
              // As per SAX2, the namespace URI is an empty string if the element has no
              // namespace URI, or namespaces is turned off. The check against null protects
              // against broken SAX implementations, so I've left it there. - mrglavas
              boolean hasNamespaceURI = (namespaceURI != null && namespaceURI.length() != 0);
  
              // SAX2: rawName (QName) could be empty string if 
              // namespace-prefixes property is false.
              if (rawName == null || rawName.length() == 0) {
                  rawName = localName;
                  if (hasNamespaceURI) {
                      String prefix;
                      prefix = getPrefix(namespaceURI);
                      if (prefix != null && prefix.length() != 0)
                          rawName = prefix + ":" + localName;
                  }
                  addNSAttr = true;
              }
              if (!hasNamespaceURI)
                  htmlName = rawName;
              else {
                  if (namespaceURI.equals(XHTMLNamespace) ||
                          (fUserXHTMLNamespace != null && fUserXHTMLNamespace.equals(namespaceURI)))
                      htmlName = localName;
                  else
                      htmlName = null;
              }
  
              // XHTML: element names are lower case, DOM will be different
              _printer.printText('<');
              if (_xhtml)
                  _printer.printText(rawName.toLowerCase(Locale.ENGLISH));
              else
                  _printer.printText(rawName);
              _printer.indent();
  
              // For each attribute serialize it's name and value as one part,
              // separated with a space so the element can be broken on
              // multiple lines.
              if (attrs != null) {
                  for (i = 0; i < attrs.getLength(); ++i) {
                      _printer.printSpace();
                      name = attrs.getQName(i).toLowerCase(Locale.ENGLISH);
                      value = attrs.getValue(i);
                      if (_xhtml || hasNamespaceURI) {
                          // XHTML: print empty string for null values.
                          if (value == null) {
                              _printer.printText(name);
                              _printer.printText("=\"\"");
                          } else {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              printEscaped(value);
                              _printer.printText('"');
                          }
                      } else {
                          // HTML: Empty values print as attribute name, no value.
                          // HTML: URI attributes will print unescaped
                          if (value == null) {
                              value = "";
                          }
                          if (!_format.getPreserveEmptyAttributes() && value.length() == 0)
                              _printer.printText(name);
                          else if (HTMLdtd.isURI(rawName, name)) {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              _printer.printText(escapeURI(value));
                              _printer.printText('"');
                          } else if (HTMLdtd.isBoolean(rawName, name))
                              _printer.printText(name);
                          else {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              printEscaped(value);
                              _printer.printText('"');
                          }
                      }
                  }
              }
              if (htmlName != null && HTMLdtd.isPreserveSpace(htmlName))
                  preserveSpace = true;
  
              if (addNSAttr) {
                  Iterator entries = _prefixes.entrySet().iterator();
                  while (entries.hasNext()) {
                      _printer.printSpace();
                      Map.Entry entry = (Map.Entry) entries.next();
                      value = (String) entry.getKey();
                      name = (String) entry.getValue();
                      if (name.length() == 0) {
                          _printer.printText("xmlns=\"");
                          printEscaped(value);
                          _printer.printText('"');
                      } else {
                          _printer.printText("xmlns:");
                          _printer.printText(name);
                          _printer.printText("=\"");
                          printEscaped(value);
                          _printer.printText('"');
                      }
                  }
              }
  
              // Now it's time to enter a new element state
              // with the tag name and space preserving.
              // We still do not change the curent element state.
              state = enterElementState(namespaceURI, localName, rawName, preserveSpace);
  
              // Prevents line breaks inside A/TD
  
              if (htmlName != null && (htmlName.equalsIgnoreCase("A") ||
                      htmlName.equalsIgnoreCase("TD"))) {
                  state.empty = false;
                  _printer.printText('>');
              }
  
              // Handle SCRIPT and STYLE specifically by changing the
              // state of the current element to CDATA (XHTML) or
              // unescaped (HTML).
              if (htmlName != null && (rawName.equalsIgnoreCase("SCRIPT") ||
                      rawName.equalsIgnoreCase("STYLE"))) {
                  if (_xhtml) {
                      // XHTML: Print contents as CDATA section
                      state.doCData = true;
                  } else {
                      // HTML: Print contents unescaped
                      state.unescaped = true;
                  }
              }
          } catch (IOException except) {
              throw new SAXException(except);
          }
      }
  
  
      @Override
      public void endElement(String namespaceURI, String localName,
                             String rawName)
              throws SAXException {
          try {
              endElementIO(namespaceURI, localName, rawName);
          } catch (IOException except) {
              throw new SAXException(except);
          }
      }
  
  
      public void endElementIO(String namespaceURI, String localName,
                               String rawName)
              throws IOException {
          ElementState state;
          String htmlName;
  
          // Works much like content() with additions for closing
          // an element. Note the different checks for the closed
          // element's state and the parent element's state.
          _printer.unindent();
          state = getElementState();
  
          if (state.namespaceURI == null || state.namespaceURI.length() == 0)
              htmlName = state.rawName;
          else {
              if (state.namespaceURI.equals(XHTMLNamespace) ||
                      (fUserXHTMLNamespace != null && fUserXHTMLNamespace.equals(state.namespaceURI)))
                  htmlName = state.localName;
              else
                  htmlName = null;
          }
  
          if (_xhtml) {
              if (state.empty) {
                  _printer.printText(" />");
              } else {
                  // Must leave CData section first
                  if (state.inCData)
                      _printer.printText("]]>");
                  // XHTML: element names are lower case, DOM will be different
                  _printer.printText("</");
                  _printer.printText(state.rawName.toLowerCase(Locale.ENGLISH));
                  _printer.printText('>');
              }
          } else {
              if (state.empty)
                  _printer.printText('>');
              // This element is not empty and that last content was
              // another element, so print a line break before that
              // last element and this element's closing tag.
              // [keith] Provided this is not an anchor.
              // HTML: some elements do not print closing tag (e.g. LI)
              if (htmlName == null || !HTMLdtd.isOnlyOpening(htmlName)) {
                  if (_indenting && !state.preserveSpace && state.afterElement)
                      _printer.breakLine();
                  // Must leave CData section first (Illegal in HTML, but still)
                  if (state.inCData)
                      _printer.printText("]]>");
                  _printer.printText("</");
                  _printer.printText(state.rawName);
                  _printer.printText('>');
              }
          }
          // Leave the element state and update that of the parent
          // (if we're not root) to not empty and after element.
          state = leaveElementState();
          // Temporary hack to prevent line breaks inside A/TD
          if (htmlName == null || (!htmlName.equalsIgnoreCase("A") &&
                  !htmlName.equalsIgnoreCase("TD")))
  
              state.afterElement = true;
          state.empty = false;
          if (isDocumentState())
              _printer.flush();
      }
  
  
      //------------------------------------------//
      // SAX document handler serializing methods //
      //------------------------------------------//
  
  
      @Override
      public void characters(char[] chars, int start, int length)
              throws SAXException {
          ElementState state;
  
          try {
              // HTML: no CDATA section
              state = content();
              state.doCData = false;
              super.characters(chars, start, length);
          } catch (IOException except) {
              throw new SAXException(except);
          }
      }
  
  
      @Override
      public void startElement(String tagName, AttributeList attrs)
              throws SAXException {
          int i;
          boolean preserveSpace;
          ElementState state;
          String name;
          String value;
  
          try {
              if (_printer == null)
                  throw new IllegalStateException(
                          DOMMessageFormatter.formatMessage(
                                  DOMMessageFormatter.SERIALIZER_DOMAIN,
                                  "NoWriterSupplied", null));
  
  
              state = getElementState();
              if (isDocumentState()) {
                  // If this is the root element handle it differently.
                  // If the first root element in the document, serialize
                  // the document's DOCTYPE. Space preserving defaults
                  // to that of the output format.
                  if (!_started)
                      startDocument(tagName);
              } else {
                  // For any other element, if first in parent, then
                  // close parent's opening tag and use the parnet's
                  // space preserving.
                  if (state.empty)
                      _printer.printText('>');
                  // Indent this element on a new line if the first
                  // content of the parent element or immediately
                  // following an element.
                  if (_indenting && !state.preserveSpace &&
                          (state.empty || state.afterElement))
                      _printer.breakLine();
              }
              preserveSpace = state.preserveSpace;
  
              // Do not change the current element state yet.
              // This only happens in endElement().
  
              // XHTML: element names are lower case, DOM will be different
              _printer.printText('<');
              if (_xhtml)
                  _printer.printText(tagName.toLowerCase(Locale.ENGLISH));
              else
                  _printer.printText(tagName);
              _printer.indent();
  
              // For each attribute serialize it's name and value as one part,
              // separated with a space so the element can be broken on
              // multiple lines.
              if (attrs != null) {
                  for (i = 0; i < attrs.getLength(); ++i) {
                      _printer.printSpace();
                      name = attrs.getName(i).toLowerCase(Locale.ENGLISH);
                      value = attrs.getValue(i);
                      if (_xhtml) {
                          // XHTML: print empty string for null values.
                          if (value == null) {
                              _printer.printText(name);
                              _printer.printText("=\"\"");
                          } else {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              printEscaped(value);
                              _printer.printText('"');
                          }
                      } else {
                          // HTML: Empty values print as attribute name, no value.
                          // HTML: URI attributes will print unescaped
                          if (value == null) {
                              value = "";
                          }
                          if (!_format.getPreserveEmptyAttributes() && value.length() == 0)
                              _printer.printText(name);
                          else if (HTMLdtd.isURI(tagName, name)) {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              _printer.printText(escapeURI(value));
                              _printer.printText('"');
                          } else if (HTMLdtd.isBoolean(tagName, name))
                              _printer.printText(name);
                          else {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              printEscaped(value);
                              _printer.printText('"');
                          }
                      }
                  }
              }
              if (HTMLdtd.isPreserveSpace(tagName))
                  preserveSpace = true;
  
              // Now it's time to enter a new element state
              // with the tag name and space preserving.
              // We still do not change the curent element state.
              state = enterElementState(null, null, tagName, preserveSpace);
  
              // Prevents line breaks inside A/TD
              if (tagName.equalsIgnoreCase("A") || tagName.equalsIgnoreCase("TD")) {
                  state.empty = false;
                  _printer.printText('>');
              }
  
              // Handle SCRIPT and STYLE specifically by changing the
              // state of the current element to CDATA (XHTML) or
              // unescaped (HTML).
              if (tagName.equalsIgnoreCase("SCRIPT") ||
                      tagName.equalsIgnoreCase("STYLE")) {
                  if (_xhtml) {
                      // XHTML: Print contents as CDATA section
                      state.doCData = true;
                  } else {
                      // HTML: Print contents unescaped
                      state.unescaped = true;
                  }
              }
          } catch (IOException except) {
              throw new SAXException(except);
          }
      }
  
  
      @Override
      public void endElement(String tagName)
              throws SAXException {
          endElement(null, null, tagName);
      }
  
  
      //------------------------------------------//
      // Generic node serializing methods methods //
      //------------------------------------------//
  
  
      /**
       * Called to serialize the document's DOCTYPE by the root element.
       * The document type declaration must name the root element,
       * but the root element is only known when that element is serialized,
       * and not at the start of the document.
       * <p/>
       * This method will check if it has not been called before ({@link #_started}),
       * will serialize the document type declaration, and will serialize all
       * pre-root comments and PIs that were accumulated in the document
       * (see {@link #serializePreRoot}). Pre-root will be serialized even if
       * this is not the first root element of the document.
       */
      protected void startDocument(String rootTagName)
              throws IOException {
          // Not supported in HTML/XHTML, but we still have to switch
          // out of DTD mode.
          _printer.leaveDTD();
          if (!_started) {
              // If the public and system identifiers were not specified
              // in the output format, use the appropriate ones for HTML
              // or XHTML.
              if (_docTypePublicId == null && _docTypeSystemId == null) {
                  if (_xhtml) {
                      _docTypePublicId = HTMLdtd.XHTMLPublicId;
                      _docTypeSystemId = HTMLdtd.XHTMLSystemId;
                  } else {
                      _docTypePublicId = HTMLdtd.HTMLPublicId;
                      _docTypeSystemId = HTMLdtd.HTMLSystemId;
                  }
              }
  
              if (!_format.getOmitDocumentType()) {
                  // XHTML: If public identifier and system identifier
                  //  specified, print them, else print just system identifier
                  // HTML: If public identifier specified, print it with
                  //  system identifier, if specified.
                  // XHTML requires that all element names are lower case, so the
                  // root on the DOCTYPE must be 'html'. - mrglavas
                  if (_docTypePublicId != null && (!_xhtml || _docTypeSystemId != null)) {
                      if (_xhtml) {
                          _printer.printText("<!DOCTYPE html PUBLIC ");
                      } else {
                          _printer.printText("<!DOCTYPE HTML PUBLIC ");
                      }
                      printDoctypeURL(_docTypePublicId);
                      if (_docTypeSystemId != null) {
                          if (_indenting) {
                              _printer.breakLine();
                              _printer.printText("                      ");
                          } else
                              _printer.printText(' ');
                          printDoctypeURL(_docTypeSystemId);
                      }
                      _printer.printText('>');
                      _printer.breakLine();
                  } else if (_docTypeSystemId != null) {
                      if (_xhtml) {
                          _printer.printText("<!DOCTYPE html SYSTEM ");
                      } else {
                          _printer.printText("<!DOCTYPE HTML SYSTEM ");
                      }
                      printDoctypeURL(_docTypeSystemId);
                      _printer.printText('>');
                      _printer.breakLine();
                  }
              }
          }
  
          _started = true;
          // Always serialize these, even if not te first root element.
          serializePreRoot();
      }
  
  
      /**
       * Called to serialize a DOM element. Equivalent to calling {@link
       * #startElement}, {@link #endElement} and serializing everything
       * inbetween, but better optimized.
       */
      @Override
      protected void serializeElement(Element elem)
              throws IOException {
          Attr attr;
          NamedNodeMap attrMap;
          int i;
          Node child;
          ElementState state;
          boolean preserveSpace;
          String name;
          String value;
          String tagName;
  
          tagName = elem.getTagName();
          state = getElementState();
          if (isDocumentState()) {
              // If this is the root element handle it differently.
              // If the first root element in the document, serialize
              // the document's DOCTYPE. Space preserving defaults
              // to that of the output format.
              if (!_started)
                  startDocument(tagName);
          } else {
              // For any other element, if first in parent, then
              // close parent's opening tag and use the parnet's
              // space preserving.
              if (state.empty)
                  _printer.printText('>');
              // Indent this element on a new line if the first
              // content of the parent element or immediately
              // following an element.
              if (_indenting && !state.preserveSpace &&
                      (state.empty || state.afterElement))
                  _printer.breakLine();
          }
          preserveSpace = state.preserveSpace;
  
          // Do not change the current element state yet.
          // This only happens in endElement().
  
          // XHTML: element names are lower case, DOM will be different
          _printer.printText('<');
          if (_xhtml)
              _printer.printText(tagName.toLowerCase(Locale.ENGLISH));
          else
              _printer.printText(tagName);
          _printer.indent();
  
          // Lookup the element's attribute, but only print specified
          // attributes. (Unspecified attributes are derived from the DTD.
          // For each attribute print it's name and value as one part,
          // separated with a space so the element can be broken on
          // multiple lines.
          attrMap = elem.getAttributes();
          if (attrMap != null) {
              for (i = 0; i < attrMap.getLength(); ++i) {
                  attr = (Attr) attrMap.item(i);
                  name = attr.getName().toLowerCase(Locale.ENGLISH);
                  value = attr.getValue();
                  if (attr.getSpecified()) {
                      _printer.printSpace();
                      if (_xhtml) {
                          // XHTML: print empty string for null values.
                          if (value == null) {
                              _printer.printText(name);
                              _printer.printText("=\"\"");
                          } else {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              printEscaped(value);
                              _printer.printText('"');
                          }
                      } else {
                          // HTML: Empty values print as attribute name, no value.
                          // HTML: URI attributes will print unescaped
                          if (value == null) {
                              value = "";
                          }
                          if (!_format.getPreserveEmptyAttributes() && value.length() == 0)
                              _printer.printText(name);
                          else if (HTMLdtd.isURI(tagName, name)) {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              _printer.printText(escapeURI(value));
                              _printer.printText('"');
                          } else if (HTMLdtd.isBoolean(tagName, name))
                              _printer.printText(name);
                          else {
                              _printer.printText(name);
                              _printer.printText("=\"");
                              printEscaped(value);
                              _printer.printText('"');
                          }
                      }
                  }
              }
          }
          if (HTMLdtd.isPreserveSpace(tagName))
              preserveSpace = true;
  
          // If element has children, or if element is not an empty tag,
          // serialize an opening tag.
          if (elem.hasChildNodes() || !HTMLdtd.isEmptyTag(tagName)) {
              // Enter an element state, and serialize the children
              // one by one. Finally, end the element.
              state = enterElementState(null, null, tagName, preserveSpace);
  
              // Prevents line breaks inside A/TD
              if (tagName.equalsIgnoreCase("A") || tagName.equalsIgnoreCase("TD")) {
                  state.empty = false;
                  _printer.printText('>');
              }
  
              // Handle SCRIPT and STYLE specifically by changing the
              // state of the current element to CDATA (XHTML) or
              // unescaped (HTML).
              if (tagName.equalsIgnoreCase("SCRIPT") ||
                      tagName.equalsIgnoreCase("STYLE")) {
                  if (_xhtml) {
                      // XHTML: Print contents as CDATA section
                      state.doCData = true;
                  } else {
                      // HTML: Print contents unescaped
                      state.unescaped = true;
                  }
              }
              child = elem.getFirstChild();
              while (child != null) {
                  serializeNode(child);
                  child = child.getNextSibling();
              }
              endElementIO(null, null, tagName);
          } else {
              _printer.unindent();
              // XHTML: Close empty tag with ' />' so it's XML and HTML compatible.
              // HTML: Empty tags are defined as such in DTD no in document.
              if (_xhtml)
                  _printer.printText(" />");
              else
                  _printer.printText('>');
              // After element but parent element is no longer empty.
              state.afterElement = true;
              state.empty = false;
              if (isDocumentState())
                  _printer.flush();
          }
      }
  
  
      @Override
      protected void characters(String text)
              throws IOException {
          // HTML: no CDATA section
          content();
          super.characters(text);
      }
  
  
      @Override
      protected String getEntityRef(int ch) {
          return HTMLdtd.fromChar(ch);
      }
  
  
      protected String escapeURI(String uri) {
          int index;
  
          // XXX  Apparently Netscape doesn't like if we escape the URI
          //      using %nn, so we leave it as is, just remove any quotes.
          index = uri.indexOf("\"");
          if (index >= 0) {
              return uri.substring(0, index);
          }
          return uri;
      }
  
  }
  