<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet 
                xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
                xmlns:rng="http://relaxng.org/ns/structure/1.0"
		xmlns:xs="http://www.w3.org/2001/XMLSchema"
		xmlns:tei="http://www.tei-c.org/ns/1.0"
		xmlns="http://www.tei-c.org/ns/1.0"
                xmlns:teix="http://www.tei-c.org/ns/Examples"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                exclude-result-prefixes="a rng tei teix xs"
                version="2.0">
  <doc xmlns="http://www.oxygenxml.com/ns/doc/xsl" scope="stylesheet" type="stylesheet">
      <desc>
         <p>
    TEI stylesheet
    dealing with converting other vocabularies to TEI
      </p>
         <p>This software is dual-licensed:

1. Distributed under a Creative Commons Attribution-ShareAlike 3.0
Unported License http://creativecommons.org/licenses/by-sa/3.0/ 

2. http://www.opensource.org/licenses/BSD-2-Clause
		
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

This software is provided by the copyright holders and contributors
"as is" and any express or implied warranties, including, but not
limited to, the implied warranties of merchantability and fitness for
a particular purpose are disclaimed. In no event shall the copyright
holder or contributors be liable for any direct, indirect, incidental,
special, exemplary, or consequential damages (including, but not
limited to, procurement of substitute goods or services; loss of use,
data, or profits; or business interruption) however caused and on any
theory of liability, whether in contract, strict liability, or tort
(including negligence or otherwise) arising in any way out of the use
of this software, even if advised of the possibility of such damage.
</p>
         <p>Author: See AUTHORS</p>
         <p>Copyright: 2013, TEI Consortium</p>
      </desc>
   </doc>

   <xsl:template name="convertStructure">
     <text>
       <body>
	 <xsl:variable name="Body">
	   <HEAD level="1" magic="true">Start</HEAD>
	   <xsl:call-template name="gatherText"/>
	 </xsl:variable>

	 <xsl:variable name="Body2">
	   <xsl:for-each select="$Body">
	     <xsl:apply-templates
		 select="*|processing-instruction()|comment()|text()"
		 mode="pass1"/>
	   </xsl:for-each>
	 </xsl:variable>

	 <xsl:for-each select="$Body2">
           <xsl:for-each-group select="tei:*|comment()" group-starting-with="tei:HEAD[@level='1']">
             <xsl:choose>
               <xsl:when test="self::tei:HEAD[@level='1']">
		 <xsl:call-template name="group-by-section"/>
               </xsl:when>
               <xsl:otherwise>
		 <xsl:call-template name="inSection"/>
            </xsl:otherwise>
             </xsl:choose>
           </xsl:for-each-group>
	 </xsl:for-each>
       </body>
     </text>
   </xsl:template>


  <xsl:template name="group-by-section">
    <xsl:variable name="ThisHeader" select="number(@level)"/>
    <xsl:variable name="NextHeader" select="number(@level)+1"/>
    <xsl:choose>
      <xsl:when test="@magic">
	  <xsl:for-each-group select="current-group() except ."
			      group-starting-with="tei:HEAD[number(@level)=$NextHeader]">
	    <xsl:choose>
	      <xsl:when test="self::tei:HEAD">
		<xsl:call-template name="group-by-section"/>
	      </xsl:when>
	    <xsl:otherwise>
	      <xsl:call-template name="inSection"/>
	    </xsl:otherwise>
	    </xsl:choose>
	  </xsl:for-each-group>
      </xsl:when>
      <xsl:otherwise>
	<div>
	  <xsl:if test="@style">
	    <xsl:attribute name="rend" select="@style"/>
	  </xsl:if>
	  <xsl:if test="not(@interpolated='true')">
	    <head>
	      <xsl:apply-templates mode="pass1"/>
	    </head>
	  </xsl:if>
	  <xsl:for-each-group select="current-group() except ."
			      group-starting-with="tei:HEAD[number(@level)=$NextHeader]">
	    <xsl:choose>
	      <xsl:when test="self::tei:HEAD">
		<xsl:call-template name="group-by-section"/>
	      </xsl:when>
	    <xsl:otherwise>
		<xsl:call-template name="inSection"/>
	    </xsl:otherwise>
	    </xsl:choose>
	  </xsl:for-each-group>
	</div>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>


  <xsl:template name="inSection">
    <xsl:for-each-group select="current-group()"
			group-adjacent="if (self::tei:GLOSS) then 1
					else if (self::tei:ITEM) then 2
					else if (self::tei:NITEM) then 3
					else 4">      
      <xsl:choose>
	<xsl:when test="current-grouping-key()=1">
	  <list type="gloss">
	    <xsl:for-each select="current-group()">
	      <xsl:element name="{@n}">
		<xsl:apply-templates
 		    select="*|@*|processing-instruction()|comment()|text()"
		    mode="pass2"/>
	      </xsl:element>
	    </xsl:for-each>
	  </list>
	</xsl:when>
	<xsl:when test="current-grouping-key()=2">
	  <list type="unordered">
	    <xsl:for-each select="current-group()">
	      <xsl:element name="{@n}">
		<xsl:apply-templates
 		    select="*|@*|processing-instruction()|comment()|text()"
		    mode="pass2"/>
	      </xsl:element>
	    </xsl:for-each>
	  </list>
	</xsl:when>
	<xsl:when test="current-grouping-key()=3">
	  <list type="ordered">
	    <xsl:for-each select="current-group()">
	      <xsl:element name="{@n}">
		<xsl:apply-templates
		    select="*|@*|processing-instruction()|comment()|text()"
		    mode="pass2"/>
	      </xsl:element>
	    </xsl:for-each>
	  </list>
	</xsl:when>
	<xsl:otherwise>
	  <xsl:for-each select="current-group()">
	    <xsl:apply-templates select="." mode="pass2"/>
	  </xsl:for-each>
	</xsl:otherwise>
      </xsl:choose>
    </xsl:for-each-group>
  </xsl:template>


  <xsl:template match="tei:HEAD" mode="pass1">
    <xsl:if test="preceding-sibling::tei:HEAD">
      <xsl:variable name="prev"
		    select="xs:integer(number(preceding-sibling::tei:HEAD[1]/@level))"/>
      <xsl:variable name="current"
		    select="xs:integer(number(@level))"/>
	<xsl:if test="($current - $prev) &gt;1 ">
	  <!--<xsl:message>Walk from <xsl:value-of select="$prev"/> to <xsl:value-of select="$current"/></xsl:message>-->
	  <xsl:for-each
	      select="$prev + 1   to $current - 1 ">
	    <HEAD interpolated='true' level="{.}"/>
	  </xsl:for-each>
	</xsl:if>
    </xsl:if>
    <xsl:copy>
    <xsl:apply-templates
	select="*|@*|processing-instruction()|comment()|text()"
	mode="pass1"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="*" mode="pass1">
    <xsl:copy>
      <xsl:apply-templates select="*|@*|processing-instruction()|comment()|text()" mode="pass1"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="@*|text()|comment()|processing-instruction()" mode="pass1">
    <xsl:copy-of select="."/>
  </xsl:template>


  <xsl:template match="@*|text()|comment()|processing-instruction()" mode="pass2">
    <xsl:copy-of select="."/>
  </xsl:template>

  <xsl:template match="tei:p[not(*) and normalize-space(.)='']" mode="pass2"/>

  <xsl:template match="*" mode="pass2">
    <xsl:copy>
      <xsl:apply-templates select="*|@*|processing-instruction()|comment()|text()" mode="pass2"/>
    </xsl:copy>
  </xsl:template>
  
  <xsl:template name="gatherText">
    <xsl:apply-templates/>
  </xsl:template>

</xsl:stylesheet>
