package org.apache.maven.doxia.module.xhtml;
   
   /*
    * 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.
   */
  
  import javax.swing.text.html.HTML.Attribute;
  
  import org.apache.maven.doxia.macro.MacroExecutionException;
  import org.apache.maven.doxia.parser.XhtmlBaseParser;
  import org.apache.maven.doxia.sink.Sink;
  import org.apache.maven.doxia.sink.SinkEventAttributeSet;
  
  import org.codehaus.plexus.util.xml.pull.XmlPullParser;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * Parse an xhtml model and emit events into a Doxia Sink.
   *
   * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
   * @version $Id: XhtmlParser.java 807186 2009-08-24 12:29:12Z vsiveton $
   * @since 1.0
   * @plexus.component role="org.apache.maven.doxia.parser.Parser" role-hint="xhtml"
   */
  public class XhtmlParser
      extends XhtmlBaseParser
      implements XhtmlMarkup
  {
      /** For boxed verbatim. */
      private boolean boxed;
  
      /** Empty elements don't write a closing tag. */
      private boolean isEmptyElement;
  
      /** {@inheritDoc} */
      protected void handleStartTag( XmlPullParser parser, Sink sink )
          throws XmlPullParserException, MacroExecutionException
      {
          isEmptyElement = parser.isEmptyElementTag();
  
          SinkEventAttributeSet attribs = getAttributesFromParser( parser );
  
          if ( parser.getName().equals( HTML.toString() ) )
          {
              //Do nothing
              return;
          }
          else if ( parser.getName().equals( HEAD.toString() ) )
          {
              sink.head( attribs );
          }
          else if ( parser.getName().equals( TITLE.toString() ) )
          {
              sink.title( attribs );
          }
          else if ( parser.getName().equals( META.toString() ) )
          {
              String name = parser.getAttributeValue( null, Attribute.NAME.toString() );
              String content = parser.getAttributeValue( null, Attribute.CONTENT.toString() );
  
              if ( "author".equals( name ) )
              {
                  sink.author( null );
  
                  sink.text( content );
  
                  sink.author_();
              }
              else if ( "date".equals( name ) )
              {
                  sink.date( null );
  
                  sink.text( content );
  
                  sink.date_();
              }
              else
              {
                  sink.unknown( "meta", new Object[] {new Integer( TAG_TYPE_SIMPLE )}, attribs );
              }
          }
          /*
           * The ADDRESS element may be used by authors to supply contact information
           * for a model or a major part of a model such as a form. This element
          *  often appears at the beginning or end of a model.
          */
         else if ( parser.getName().equals( ADDRESS.toString() ) )
         {
             sink.author( attribs );
         }
         else if ( parser.getName().equals( BODY.toString() ) )
         {
             sink.body( attribs );
         }
         else if ( parser.getName().equals( DIV.toString() ) )
         {
             String divclass = parser.getAttributeValue( null, Attribute.CLASS.toString() );
 
             if ( "source".equals( divclass ) )
             {
                 this.boxed = true;
             }
 
             super.baseStartTag( parser, sink ); // pick up other divs
         }
         /*
          * The PRE element tells visual user agents that the enclosed text is
          * "preformatted". When handling preformatted text, visual user agents:
          * - May leave white space intact.
          * - May render text with a fixed-pitch font.
          * - May disable automatic word wrap.
          * - Must not disable bidirectional processing.
          * Non-visual user agents are not required to respect extra white space
          * in the content of a PRE element.
          */
         else if ( parser.getName().equals( PRE.toString() ) )
         {
             if ( boxed )
             {
                 attribs.addAttributes( SinkEventAttributeSet.BOXED );
             }
 
             verbatim();
 
             sink.verbatim( attribs );
         }
         else if ( !baseStartTag( parser, sink ) )
         {
             if ( isEmptyElement )
             {
                 handleUnknown( parser, sink, TAG_TYPE_SIMPLE );
             }
             else
             {
                 handleUnknown( parser, sink, TAG_TYPE_START );
             }
 
             if ( getLog().isDebugEnabled() )
             {
                 String position = "[" + parser.getLineNumber() + ":"
                     + parser.getColumnNumber() + "]";
                 String tag = "<" + parser.getName() + ">";
 
                 getLog().debug( "Unrecognized xhtml tag: " + tag + " at " + position );
             }
         }
     }
 
     /** {@inheritDoc} */
     protected void handleEndTag( XmlPullParser parser, Sink sink )
         throws XmlPullParserException, MacroExecutionException
     {
         if ( parser.getName().equals( HTML.toString() ) )
         {
             //Do nothing
             return;
         }
         else if ( parser.getName().equals( HEAD.toString() ) )
         {
             sink.head_();
         }
         else if ( parser.getName().equals( TITLE.toString() ) )
         {
             sink.title_();
         }
         else if ( parser.getName().equals( BODY.toString() ) )
         {
             consecutiveSections( 0, sink );
 
             sink.body_();
         }
         else if ( parser.getName().equals( ADDRESS.toString() ) )
         {
             sink.author_();
         }
         else if ( parser.getName().equals( DIV.toString() ) )
         {
             this.boxed = false;
             super.baseEndTag( parser, sink );
         }
         else if ( !baseEndTag( parser, sink ) )
         {
             if ( !isEmptyElement )
             {
                 handleUnknown( parser, sink, TAG_TYPE_END );
             }
         }
 
         isEmptyElement = false;
     }
 
     /** {@inheritDoc} */
     protected void init()
     {
         super.init();
 
         this.boxed = false;
         this.isEmptyElement = false;
     }
 }