content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 1999-2004 The Apache Software Foundation.
   *
   * Licensed 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 jaxp.sun.org.apache.xml.internal.serialize;
  
  import jaxp.sun.org.apache.xerces.internal.dom.DOMMessageFormatter;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.Writer;
  import java.util.Enumeration;
  import java.util.Locale;
  
  import org.w3c.dom.Attr;
  import org.w3c.dom.Element;
  import org.w3c.dom.NamedNodeMap;
  import org.w3c.dom.Node;
  import org.xml.sax.AttributeList;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  
  
  /**
   * 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>
   *
   * @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.
   * @author <a href="mailto:arkin@intalio.com">Assaf Arkin</a>
   * @see Serializer
   */
  public class HTMLSerializer
      extends BaseMarkupSerializer
  {
  
  
      /**
       * True if serializing in XHTML format.
       */
      private boolean _xhtml;
  
  
      public static final String XHTMLNamespace = "http://www.w3.org/1999/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 );
      }
  
  
      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 //
      //-----------------------------------------//
  
  
      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 ) {
                  Enumeration keys;
  
                  keys = _prefixes.keys();
                  while ( keys.hasMoreElements() ) {
                      _printer.printSpace();
                      value = (String) keys.nextElement();
                      name = (String) _prefixes.get( value );
                      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 );
          }
      }
  
  
      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 //
      //------------------------------------------//
  
  
      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 );
          }
      }
  
  
      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 );
          }
      }
  
  
      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
      {
          StringBuffer buffer;
  
          // 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.
       */
      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();
          }
      }
  
  
  
      protected void characters( String text )
          throws IOException
      {
          ElementState state;
  
          // HTML: no CDATA section
          state = content();
          super.characters( text );
      }
  
  
      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 );
          else
              return uri;
      }
  
  
  }
  