package org.apache.maven.doxia.module.fml;
   
   /*
    * 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 org.apache.maven.doxia.macro.MacroExecutionException;
  import org.apache.maven.doxia.parser.Xhtml5BaseParser;
  import org.apache.maven.doxia.sink.Sink;
  import org.apache.maven.doxia.sink.impl.SinkEventAttributeSet;
  import org.codehaus.plexus.util.xml.pull.XmlPullParser;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * Parse Fml questions and answers, these may contain arbitrary xdoc elements.
   *
   * @author ltheussl
   * @since 1.0
   */
  public class FmlContentParser
      extends Xhtml5BaseParser
      implements FmlMarkup
  {
      /** 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();
  
          if ( parser.getName().equals( QUESTION_TAG.toString() )
                  || parser.getName().equals( TITLE.toString() )
              || parser.getName().equals( ANSWER_TAG.toString() ) )
          {
              // ignore
              return;
          }
          else if ( parser.getName().equals( SOURCE_TAG.toString() ) )
          {
              verbatim();
  
              sink.verbatim( SinkEventAttributeSet.BOXED );
          }
          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 fml tag: " + tag + " at " + position );
              }
          }
      }
  
      /** {@inheritDoc} */
      protected void handleEndTag( XmlPullParser parser, Sink sink )
          throws XmlPullParserException, MacroExecutionException
      {
          if ( parser.getName().equals( QUESTION_TAG.toString() )
                  || parser.getName().equals( TITLE.toString() )
              || parser.getName().equals( ANSWER_TAG.toString() ) )
          {
              // ignore
              return;
          }
          else if ( parser.getName().equals( SOURCE_TAG.toString() ) )
          {
              verbatim_();
  
              sink.verbatim_();
          }
         else if ( !baseEndTag( parser, sink ) )
         {
             if ( !isEmptyElement )
             {
                 handleUnknown( parser, sink, TAG_TYPE_END );
             }
         }
 
         isEmptyElement = false;
     }
 
     /**
      * {@inheritDoc}
      */
     protected void init()
     {
         super.init();
 
         this.isEmptyElement = false;
     }
 }