<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0">

<!-- ********************************************************************
     $Id: chunk-common.xsl,v 1.41 2004/10/23 11:51:10 nwalsh Exp $
     ********************************************************************

     This file is part of the XSL DocBook Stylesheet distribution.
     See ../README or http://nwalsh.com/docbook/xsl/ for copyright
     and other information.

     ******************************************************************** -->

<!-- ==================================================================== -->

<xsl:template name="chunk">
  <xsl:param name="node" select="."/>
  <!-- returns 1 if $node is a chunk -->

  <!-- ==================================================================== -->
  <!-- What's a chunk?

       The root element
       appendix
       article
       bibliography  in article or part or book
       book
       chapter
       colophon
       glossary      in article or part or book
       index         in article or part or book
       part
       preface
       refentry
       reference
       sect{1,2,3,4,5}  if position()>1 && depth < chunk.section.depth
       section          if position()>1 && depth < chunk.section.depth
       set
       setindex
                                                                            -->
  <!-- ==================================================================== -->

<!--
  <xsl:message>
    <xsl:text>chunk: </xsl:text>
    <xsl:value-of select="name($node)"/>
    <xsl:text>(</xsl:text>
    <xsl:value-of select="$node/@id"/>
    <xsl:text>)</xsl:text>
    <xsl:text> csd: </xsl:text>
    <xsl:value-of select="$chunk.section.depth"/>
    <xsl:text> cfs: </xsl:text>
    <xsl:value-of select="$chunk.first.sections"/>
    <xsl:text> ps: </xsl:text>
    <xsl:value-of select="count($node/parent::section)"/>
    <xsl:text> prs: </xsl:text>
    <xsl:value-of select="count($node/preceding-sibling::section)"/>
  </xsl:message>
-->

  <xsl:choose>
    <xsl:when test="not($node/parent::*)">1</xsl:when>

    <xsl:when test="local-name($node) = 'sect1'
                    and $chunk.section.depth &gt;= 1
                    and ($chunk.first.sections != 0
                         or count($node/preceding-sibling::sect1) &gt; 0)">
      <xsl:text>1</xsl:text>
    </xsl:when>
    <xsl:when test="local-name($node) = 'sect2'
                    and $chunk.section.depth &gt;= 2
                    and ($chunk.first.sections != 0
                         or count($node/preceding-sibling::sect2) &gt; 0)">
      <xsl:call-template name="chunk">
        <xsl:with-param name="node" select="$node/parent::*"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="local-name($node) = 'sect3'
                    and $chunk.section.depth &gt;= 3
                    and ($chunk.first.sections != 0
                         or count($node/preceding-sibling::sect3) &gt; 0)">
      <xsl:call-template name="chunk">
        <xsl:with-param name="node" select="$node/parent::*"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="local-name($node) = 'sect4'
                    and $chunk.section.depth &gt;= 4
                    and ($chunk.first.sections != 0
                         or count($node/preceding-sibling::sect4) &gt; 0)">
      <xsl:call-template name="chunk">
        <xsl:with-param name="node" select="$node/parent::*"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="local-name($node) = 'sect5'
                    and $chunk.section.depth &gt;= 5
                    and ($chunk.first.sections != 0
                         or count($node/preceding-sibling::sect5) &gt; 0)">
      <xsl:call-template name="chunk">
        <xsl:with-param name="node" select="$node/parent::*"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:when test="local-name($node) = 'section'
                    and $chunk.section.depth &gt;= count($node/ancestor::section)+1
                    and ($chunk.first.sections != 0
                         or count($node/preceding-sibling::section) &gt; 0)">
      <xsl:call-template name="chunk">
        <xsl:with-param name="node" select="$node/parent::*"/>
      </xsl:call-template>
    </xsl:when>

    <xsl:when test="name($node)='preface'">1</xsl:when>
    <xsl:when test="name($node)='chapter'">1</xsl:when>
    <xsl:when test="name($node)='appendix'">1</xsl:when>
    <xsl:when test="name($node)='article'">1</xsl:when>
    <xsl:when test="name($node)='part'">1</xsl:when>
    <xsl:when test="name($node)='reference'">1</xsl:when>
    <xsl:when test="name($node)='refentry'">1</xsl:when>
    <xsl:when test="name($node)='index' and $generate.index != 0
                    and (name($node/parent::*) = 'article'
                    or name($node/parent::*) = 'book'
                    or name($node/parent::*) = 'part'
                    )">1</xsl:when>
    <xsl:when test="name($node)='bibliography'
                    and (name($node/parent::*) = 'article'
                    or name($node/parent::*) = 'book'
                    or name($node/parent::*) = 'part'
                    )">1</xsl:when>
    <xsl:when test="name($node)='glossary'
                    and (name($node/parent::*) = 'article'
                    or name($node/parent::*) = 'book'
                    or name($node/parent::*) = 'part'
                    )">1</xsl:when>
    <xsl:when test="name($node)='colophon'">1</xsl:when>
    <xsl:when test="name($node)='book'">1</xsl:when>
    <xsl:when test="name($node)='set'">1</xsl:when>
    <xsl:when test="name($node)='setindex'">1</xsl:when>
    <xsl:otherwise>0</xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="*" mode="chunk-filename">
  <!-- returns the filename of a chunk -->
  <xsl:variable name="ischunk">
    <xsl:call-template name="chunk"/>
  </xsl:variable>

  <xsl:variable name="fn">
    <xsl:apply-templates select="." mode="recursive-chunk-filename"/>
  </xsl:variable>

  <!--
  <xsl:message>
    <xsl:value-of select="$ischunk"/>
    <xsl:text> (</xsl:text>
    <xsl:value-of select="local-name(.)"/>
    <xsl:text>) </xsl:text>
    <xsl:value-of select="$fn"/>
    <xsl:text>, </xsl:text>
    <xsl:call-template name="dbhtml-dir"/>
  </xsl:message>
  -->

  <!-- 2003-11-25 by ndw:
       The following test used to read test="$ischunk != 0 and $fn != ''"
       I've removed the ischunk part of the test so that href.to.uri and
       href.from.uri will be fully qualified even if the source or target
       isn't a chunk. I *think* that if $fn != '' then it's appropriate
       to put the directory on the front, even if the element isn't a
       chunk. I could be wrong. -->

  <xsl:if test="$fn != ''">
    <xsl:call-template name="dbhtml-dir"/>
  </xsl:if>

  <xsl:value-of select="$fn"/>
  <!-- You can't add the html.ext here because dbhtml filename= may already -->
  <!-- have added it. It really does have to be handled in the recursive template -->
</xsl:template>

<xsl:template match="*" mode="recursive-chunk-filename">
  <xsl:param name="recursive" select="false()"/>

  <!-- returns the filename of a chunk -->
  <xsl:variable name="ischunk">
    <xsl:call-template name="chunk"/>
  </xsl:variable>

  <xsl:variable name="dbhtml-filename">
    <xsl:call-template name="dbhtml-filename"/>
  </xsl:variable>

  <xsl:variable name="filename">
    <xsl:choose>
      <xsl:when test="$dbhtml-filename != ''">
        <xsl:value-of select="$dbhtml-filename"/>
      </xsl:when>
      <!-- if this is the root element, use the root.filename -->
      <xsl:when test="not(parent::*) and $root.filename != ''">
        <xsl:value-of select="$root.filename"/>
        <xsl:value-of select="$html.ext"/>
      </xsl:when>
      <!-- if there's no dbhtml filename, and if we're to use IDs as -->
      <!-- filenames, then use the ID to generate the filename. -->
      <xsl:when test="@id and $use.id.as.filename != 0">
        <xsl:value-of select="@id"/>
        <xsl:value-of select="$html.ext"/>
      </xsl:when>
      <xsl:otherwise></xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:choose>
    <xsl:when test="$ischunk='0'">
      <!-- if called on something that isn't a chunk, walk up... -->
      <xsl:choose>
        <xsl:when test="count(parent::*)>0">
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="$recursive"/>
          </xsl:apply-templates>
        </xsl:when>
        <!-- unless there is no up, in which case return "" -->
        <xsl:otherwise></xsl:otherwise>
      </xsl:choose>
    </xsl:when>

    <xsl:when test="not($recursive) and $filename != ''">
      <!-- if this chunk has an explicit name, use it -->
      <xsl:value-of select="$filename"/>
    </xsl:when>

    <xsl:when test="self::set">
      <xsl:value-of select="$root.filename"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::book">
      <xsl:text>bk</xsl:text>
      <xsl:number level="any" format="01"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::article">
      <xsl:if test="/set">
        <!-- in a set, make sure we inherit the right book info... -->
        <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
          <xsl:with-param name="recursive" select="true()"/>
        </xsl:apply-templates>
      </xsl:if>

      <xsl:text>ar</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::preface">
      <xsl:if test="/set">
        <!-- in a set, make sure we inherit the right book info... -->
        <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
          <xsl:with-param name="recursive" select="true()"/>
        </xsl:apply-templates>
      </xsl:if>

      <xsl:text>pr</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::chapter">
      <xsl:if test="/set">
        <!-- in a set, make sure we inherit the right book info... -->
        <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
          <xsl:with-param name="recursive" select="true()"/>
        </xsl:apply-templates>
      </xsl:if>

      <xsl:text>ch</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::appendix">
      <xsl:if test="/set">
        <!-- in a set, make sure we inherit the right book info... -->
        <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
          <xsl:with-param name="recursive" select="true()"/>
        </xsl:apply-templates>
      </xsl:if>

      <xsl:text>ap</xsl:text>
      <xsl:number level="any" format="a" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::part">
      <xsl:choose>
        <xsl:when test="/set">
          <!-- in a set, make sure we inherit the right book info... -->
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>pt</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::reference">
      <xsl:choose>
        <xsl:when test="/set">
          <!-- in a set, make sure we inherit the right book info... -->
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>rn</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::refentry">
      <xsl:choose>
        <xsl:when test="parent::reference">
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>re</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::colophon">
      <xsl:choose>
        <xsl:when test="/set">
          <!-- in a set, make sure we inherit the right book info... -->
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>co</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::sect1
                    or self::sect2
                    or self::sect3
                    or self::sect4
                    or self::sect5
                    or self::section">
      <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
        <xsl:with-param name="recursive" select="true()"/>
      </xsl:apply-templates>
      <xsl:text>s</xsl:text>
      <xsl:number format="01"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::bibliography">
      <xsl:choose>
        <xsl:when test="/set">
          <!-- in a set, make sure we inherit the right book info... -->
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>bi</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::glossary">
      <xsl:choose>
        <xsl:when test="/set">
          <!-- in a set, make sure we inherit the right book info... -->
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>go</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::index">
      <xsl:choose>
        <xsl:when test="/set">
          <!-- in a set, make sure we inherit the right book info... -->
          <xsl:apply-templates mode="recursive-chunk-filename" select="parent::*">
            <xsl:with-param name="recursive" select="true()"/>
          </xsl:apply-templates>
        </xsl:when>
        <xsl:otherwise>
        </xsl:otherwise>
      </xsl:choose>

      <xsl:text>ix</xsl:text>
      <xsl:number level="any" format="01" from="book"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:when test="self::setindex">
      <xsl:text>si</xsl:text>
      <xsl:number level="any" format="01" from="set"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:when>

    <xsl:otherwise>
      <xsl:text>chunk-filename-error-</xsl:text>
      <xsl:value-of select="name(.)"/>
      <xsl:number level="any" format="01" from="set"/>
      <xsl:if test="not($recursive)">
        <xsl:value-of select="$html.ext"/>
      </xsl:if>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="href.target.uri">
  <xsl:param name="object" select="."/>
  <xsl:variable name="ischunk">
    <xsl:call-template name="chunk">
      <xsl:with-param name="node" select="$object"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:apply-templates mode="chunk-filename" select="$object"/>

  <xsl:if test="$ischunk='0'">
    <xsl:text>#</xsl:text>
    <xsl:call-template name="object.id">
      <xsl:with-param name="object" select="$object"/>
    </xsl:call-template>
  </xsl:if>
</xsl:template>

<xsl:template name="href.target">
  <xsl:param name="context" select="."/>
  <xsl:param name="object" select="."/>

  <xsl:variable name="href.to.uri">
    <xsl:call-template name="href.target.uri">
      <xsl:with-param name="object" select="$object"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="href.from.uri">
    <xsl:call-template name="href.target.uri">
      <xsl:with-param name="object" select="$context"/>
    </xsl:call-template>
  </xsl:variable>
  
  <!--
  <xsl:message>href.to.uri: <xsl:value-of select="$href.to.uri"/></xsl:message>
  <xsl:message>href.from.uri: <xsl:value-of select="$href.from.uri"/></xsl:message>
  -->

  <xsl:variable name="href.to">
    <xsl:call-template name="trim.common.uri.paths">
      <xsl:with-param name="uriA" select="$href.to.uri"/>
      <xsl:with-param name="uriB" select="$href.from.uri"/>
      <xsl:with-param name="return" select="'A'"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="href.from">
    <xsl:call-template name="trim.common.uri.paths">
      <xsl:with-param name="uriA" select="$href.to.uri"/>
      <xsl:with-param name="uriB" select="$href.from.uri"/>
      <xsl:with-param name="return" select="'B'"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="depth">
    <xsl:call-template name="count.uri.path.depth">
      <xsl:with-param name="filename" select="$href.from"/>
    </xsl:call-template>
  </xsl:variable>

  <xsl:variable name="href">
    <xsl:call-template name="copy-string">
      <xsl:with-param name="string" select="'../'"/>
      <xsl:with-param name="count" select="$depth"/>
    </xsl:call-template>
    <xsl:value-of select="$href.to"/>
  </xsl:variable>

  <!--
  <xsl:message>
    <xsl:text>In </xsl:text>
    <xsl:value-of select="name(.)"/>
    <xsl:text> (</xsl:text>
    <xsl:value-of select="$href.from"/>
    <xsl:text>,</xsl:text>
    <xsl:value-of select="$depth"/>
    <xsl:text>) </xsl:text>
    <xsl:value-of select="name($object)"/>
    <xsl:text> href=</xsl:text>
    <xsl:value-of select="$href"/>
  </xsl:message>
  -->

  <xsl:value-of select="$href"/>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="html.head">
  <xsl:param name="prev" select="/foo"/>
  <xsl:param name="next" select="/foo"/>
  <xsl:variable name="this" select="."/>
  <xsl:variable name="home" select="/*[1]"/>
  <xsl:variable name="up" select="parent::*"/>

  <head>
    <xsl:call-template name="system.head.content"/>
    <xsl:call-template name="head.content"/>

    <xsl:if test="$home">
      <link rel="start">
        <xsl:attribute name="href">
          <xsl:call-template name="href.target">
            <xsl:with-param name="object" select="$home"/>
          </xsl:call-template>
        </xsl:attribute>
        <xsl:attribute name="title">
          <xsl:apply-templates select="$home"
                               mode="object.title.markup.textonly"/>
        </xsl:attribute>
      </link>
    </xsl:if>

    <xsl:if test="$up">
      <link rel="up">
        <xsl:attribute name="href">
          <xsl:call-template name="href.target">
            <xsl:with-param name="object" select="$up"/>
          </xsl:call-template>
        </xsl:attribute>
        <xsl:attribute name="title">
          <xsl:apply-templates select="$up" mode="object.title.markup.textonly"/>
        </xsl:attribute>
      </link>
    </xsl:if>

    <xsl:if test="$prev">
      <link rel="prev">
        <xsl:attribute name="href">
          <xsl:call-template name="href.target">
            <xsl:with-param name="object" select="$prev"/>
          </xsl:call-template>
        </xsl:attribute>
        <xsl:attribute name="title">
          <xsl:apply-templates select="$prev" mode="object.title.markup.textonly"/>
        </xsl:attribute>
      </link>
    </xsl:if>

    <xsl:if test="$next">
      <link rel="next">
        <xsl:attribute name="href">
          <xsl:call-template name="href.target">
            <xsl:with-param name="object" select="$next"/>
          </xsl:call-template>
        </xsl:attribute>
        <xsl:attribute name="title">
          <xsl:apply-templates select="$next" mode="object.title.markup.textonly"/>
        </xsl:attribute>
      </link>
    </xsl:if>

    <xsl:if test="$html.extra.head.links != 0">
      <xsl:for-each select="//part
                            |//reference
                            |//preface
                            |//chapter
                            |//article
                            |//refentry
                            |//appendix[not(parent::article)]|appendix
                            |//glossary[not(parent::article)]|glossary
                            |//index[not(parent::article)]|index">
        <link rel="{local-name(.)}">
          <xsl:attribute name="href">
            <xsl:call-template name="href.target">
              <xsl:with-param name="context" select="$this"/>
              <xsl:with-param name="object" select="."/>
            </xsl:call-template>
          </xsl:attribute>
          <xsl:attribute name="title">
            <xsl:apply-templates select="." mode="object.title.markup.textonly"/>
          </xsl:attribute>
        </link>
      </xsl:for-each>

      <xsl:for-each select="section|sect1|refsection|refsect1">
        <link>
          <xsl:attribute name="rel">
            <xsl:choose>
              <xsl:when test="local-name($this) = 'section'
                              or local-name($this) = 'refsection'">
                <xsl:value-of select="'subsection'"/>
              </xsl:when>
              <xsl:otherwise>
                <xsl:value-of select="'section'"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:attribute>
          <xsl:attribute name="href">
            <xsl:call-template name="href.target">
              <xsl:with-param name="context" select="$this"/>
              <xsl:with-param name="object" select="."/>
            </xsl:call-template>
          </xsl:attribute>
          <xsl:attribute name="title">
            <xsl:apply-templates select="." mode="object.title.markup.textonly"/>
          </xsl:attribute>
        </link>
      </xsl:for-each>

      <xsl:for-each select="sect2|sect3|sect4|sect5|refsect2|refsect3">
        <link rel="subsection">
          <xsl:attribute name="href">
            <xsl:call-template name="href.target">
              <xsl:with-param name="context" select="$this"/>
              <xsl:with-param name="object" select="."/>
            </xsl:call-template>
          </xsl:attribute>
          <xsl:attribute name="title">
            <xsl:apply-templates select="." mode="object.title.markup.textonly"/>
          </xsl:attribute>
        </link>
      </xsl:for-each>
    </xsl:if>

    <xsl:call-template name="user.head.content"/>
  </head>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="header.navigation">
  <xsl:param name="prev" select="/foo"/>
  <xsl:param name="next" select="/foo"/>
  <xsl:param name="nav.context"/>

  <xsl:variable name="home" select="/*[1]"/>
  <xsl:variable name="up" select="parent::*"/>

  <xsl:variable name="row1" select="$navig.showtitles != 0"/>
  <xsl:variable name="row2" select="count($prev) &gt; 0
                                    or (count($up) &gt; 0 
					and generate-id($up) != generate-id($home)
                                        and $navig.showtitles != 0)
                                    or count($next) &gt; 0"/>

  <xsl:if test="$suppress.navigation = '0' and $suppress.header.navigation = '0'">
    <div class="navheader">
      <xsl:if test="$row1 or $row2">
        <table width="100%" summary="Navigation header">
          <xsl:if test="$row1">
            <tr>
              <th colspan="3" align="center">
                <xsl:apply-templates select="." mode="object.title.markup"/>
              </th>
            </tr>
          </xsl:if>

          <xsl:if test="$row2">
            <tr>
              <td width="20%" align="left">
                <xsl:if test="count($prev)>0">
                  <a accesskey="p">
                    <xsl:attribute name="href">
                      <xsl:call-template name="href.target">
                        <xsl:with-param name="object" select="$prev"/>
                      </xsl:call-template>
                    </xsl:attribute>
                    <xsl:call-template name="navig.content">
                      <xsl:with-param name="direction" select="'prev'"/>
                    </xsl:call-template>
                  </a>
                </xsl:if>
                <xsl:text>&#160;</xsl:text>
              </td>
              <th width="60%" align="center">
                <xsl:choose>
                  <xsl:when test="count($up) > 0
				  and generate-id($up) != generate-id($home)
                                  and $navig.showtitles != 0">
                    <xsl:apply-templates select="$up" mode="object.title.markup"/>
                  </xsl:when>
                  <xsl:otherwise>&#160;</xsl:otherwise>
                </xsl:choose>
              </th>
              <td width="20%" align="right">
                <xsl:text>&#160;</xsl:text>
                <xsl:if test="count($next)>0">
                  <a accesskey="n">
                    <xsl:attribute name="href">
                      <xsl:call-template name="href.target">
                        <xsl:with-param name="object" select="$next"/>
                      </xsl:call-template>
                    </xsl:attribute>
                    <xsl:call-template name="navig.content">
                      <xsl:with-param name="direction" select="'next'"/>
                    </xsl:call-template>
                  </a>
                </xsl:if>
              </td>
            </tr>
          </xsl:if>
        </table>
      </xsl:if>
      <xsl:if test="$header.rule != 0">
        <hr/>
      </xsl:if>
    </div>
  </xsl:if>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="footer.navigation">
  <xsl:param name="prev" select="/foo"/>
  <xsl:param name="next" select="/foo"/>
  <xsl:param name="nav.context"/>

  <xsl:variable name="home" select="/*[1]"/>
  <xsl:variable name="up" select="parent::*"/>

  <xsl:variable name="row1" select="count($prev) &gt; 0
                                    or count($up) &gt; 0
                                    or count($next) &gt; 0"/>

  <xsl:variable name="row2" select="($prev and $navig.showtitles != 0)
                                    or (generate-id($home) != generate-id(.)
                                        or $nav.context = 'toc')
                                    or ($chunk.tocs.and.lots != 0
                                        and $nav.context != 'toc')
                                    or ($next and $navig.showtitles != 0)"/>

  <xsl:if test="$suppress.navigation = '0' and $suppress.footer.navigation = '0'">
    <div class="navfooter">
      <xsl:if test="$footer.rule != 0">
        <hr/>
      </xsl:if>

      <xsl:if test="$row1 or $row2">
        <table width="100%" summary="Navigation footer">
          <xsl:if test="$row1">
            <tr>
              <td width="40%" align="left">
                <xsl:if test="count($prev)>0">
                  <a accesskey="p">
                    <xsl:attribute name="href">
                      <xsl:call-template name="href.target">
                        <xsl:with-param name="object" select="$prev"/>
                      </xsl:call-template>
                    </xsl:attribute>
                    <xsl:call-template name="navig.content">
                      <xsl:with-param name="direction" select="'prev'"/>
                    </xsl:call-template>
                  </a>
                </xsl:if>
                <xsl:text>&#160;</xsl:text>
              </td>
              <td width="20%" align="center">
                <xsl:choose>
                  <xsl:when test="count($up)&gt;0
		                  and generate-id($up) != generate-id($home)">
		    <a accesskey="u">
                      <xsl:attribute name="href">
                        <xsl:call-template name="href.target">
                          <xsl:with-param name="object" select="$up"/>
                        </xsl:call-template>
                      </xsl:attribute>
                      <xsl:call-template name="navig.content">
                        <xsl:with-param name="direction" select="'up'"/>
                      </xsl:call-template>
                    </a>
                  </xsl:when>
                  <xsl:otherwise>&#160;</xsl:otherwise>
                </xsl:choose>
              </td>
              <td width="40%" align="right">
                <xsl:text>&#160;</xsl:text>
                <xsl:if test="count($next)>0">
                  <a accesskey="n">
                    <xsl:attribute name="href">
                      <xsl:call-template name="href.target">
                        <xsl:with-param name="object" select="$next"/>
                      </xsl:call-template>
                    </xsl:attribute>
                    <xsl:call-template name="navig.content">
                      <xsl:with-param name="direction" select="'next'"/>
                    </xsl:call-template>
                  </a>
                </xsl:if>
              </td>
            </tr>
          </xsl:if>

          <xsl:if test="$row2">
            <tr>
              <td width="40%" align="left" valign="top">
                <xsl:if test="$navig.showtitles != 0">
                  <xsl:apply-templates select="$prev" mode="object.title.markup"/>
                </xsl:if>
                <xsl:text>&#160;</xsl:text>
              </td>
              <td width="20%" align="center">
                <xsl:choose>
                  <xsl:when test="$home != . or $nav.context = 'toc'">
                    <a accesskey="h">
                      <xsl:attribute name="href">
                        <xsl:call-template name="href.target">
                          <xsl:with-param name="object" select="$home"/>
                        </xsl:call-template>
                      </xsl:attribute>
                      <xsl:call-template name="navig.content">
                        <xsl:with-param name="direction" select="'home'"/>
                      </xsl:call-template>
                    </a>
                    <xsl:if test="$chunk.tocs.and.lots != 0 and $nav.context != 'toc'">
                      <xsl:text>&#160;|&#160;</xsl:text>
                    </xsl:if>
                  </xsl:when>
                  <xsl:otherwise>&#160;</xsl:otherwise>
                </xsl:choose>

                <xsl:if test="$chunk.tocs.and.lots != 0 and $nav.context != 'toc'">
                  <a accesskey="t">
                    <xsl:attribute name="href">
                      <xsl:apply-templates select="/*[1]"
                                           mode="recursive-chunk-filename"/>
                      <xsl:text>-toc</xsl:text>
                      <xsl:value-of select="$html.ext"/>
                    </xsl:attribute>
                    <xsl:call-template name="gentext">
                      <xsl:with-param name="key" select="'nav-toc'"/>
                    </xsl:call-template>
                  </a>
                </xsl:if>
              </td>
              <td width="40%" align="right" valign="top">
                <xsl:text>&#160;</xsl:text>
                <xsl:if test="$navig.showtitles != 0">
                  <xsl:apply-templates select="$next" mode="object.title.markup"/>
                </xsl:if>
              </td>
            </tr>
          </xsl:if>
        </table>
      </xsl:if>
    </div>
  </xsl:if>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="navig.content">
    <xsl:param name="direction" select="next"/>
    <xsl:variable name="navtext">
        <xsl:choose>
	    <xsl:when test="$direction = 'prev'">
		<xsl:call-template name="gentext.nav.prev"/>
	    </xsl:when>
	    <xsl:when test="$direction = 'next'">
		<xsl:call-template name="gentext.nav.next"/>
	    </xsl:when>
	    <xsl:when test="$direction = 'up'">
		<xsl:call-template name="gentext.nav.up"/>
	    </xsl:when>
	    <xsl:when test="$direction = 'home'">
		<xsl:call-template name="gentext.nav.home"/>
	    </xsl:when>
	    <xsl:otherwise>
		<xsl:text>xxx</xsl:text>
	    </xsl:otherwise>
	</xsl:choose>
    </xsl:variable>

    <xsl:choose>
	<xsl:when test="$navig.graphics != 0">
	    <img>
		<xsl:attribute name="src">
		    <xsl:value-of select="$navig.graphics.path"/>
		    <xsl:value-of select="$direction"/>
		    <xsl:value-of select="$navig.graphics.extension"/>
		</xsl:attribute>
		<xsl:attribute name="alt">
		    <xsl:value-of select="$navtext"/>
		</xsl:attribute>
	    </img>
	</xsl:when>
	<xsl:otherwise>
	    <xsl:value-of select="$navtext"/>
	</xsl:otherwise>
    </xsl:choose>
</xsl:template>

<!-- ==================================================================== -->

<xsl:template match="processing-instruction('dbhtml')">
  <!-- nop -->
</xsl:template>

<!-- ==================================================================== -->

<xsl:template name="chunk-element-content">
  <xsl:param name="prev"/>
  <xsl:param name="next"/>
  <xsl:param name="nav.context"/>
  <xsl:param name="content">
    <xsl:apply-imports/>
  </xsl:param>

  <xsl:call-template name="user.preroot"/>

  <html>
    <xsl:call-template name="html.head">
      <xsl:with-param name="prev" select="$prev"/>
      <xsl:with-param name="next" select="$next"/>
    </xsl:call-template>

    <body>
      <xsl:call-template name="body.attributes"/>
      <xsl:call-template name="user.header.navigation"/>

      <xsl:call-template name="header.navigation">
	<xsl:with-param name="prev" select="$prev"/>
	<xsl:with-param name="next" select="$next"/>
	<xsl:with-param name="nav.context" select="$nav.context"/>
      </xsl:call-template>

      <xsl:call-template name="user.header.content"/>

      <xsl:copy-of select="$content"/>

      <xsl:call-template name="user.footer.content"/>

      <xsl:call-template name="footer.navigation">
	<xsl:with-param name="prev" select="$prev"/>
	<xsl:with-param name="next" select="$next"/>
	<xsl:with-param name="nav.context" select="$nav.context"/>
      </xsl:call-template>

      <xsl:call-template name="user.footer.navigation"/>
    </body>
  </html>
</xsl:template>

</xsl:stylesheet>
