<?xml version='1.0'?>
<xsl:stylesheet exclude-result-prefixes="d"
                 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:d="http://docbook.org/ns/docbook"
xmlns:fo="http://www.w3.org/1999/XSL/Format"
                version='1.0'>

<!-- ********************************************************************
     $Id: toc.xsl 9822 2013-10-19 00:45:49Z stilor $
     ********************************************************************

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

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

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

<!-- only set, book and part puts toc in its own page sequence -->

<xsl:template match="d:set/d:toc | d:book/d:toc | d:part/d:toc">
  <xsl:variable name="toc.params">
    <xsl:call-template name="find.path.params">
      <xsl:with-param name="node" select="parent::*"/>
      <xsl:with-param name="table" select="normalize-space($generate.toc)"/>
    </xsl:call-template>
  </xsl:variable>

  <!-- Do not output the toc element if one is already generated
       by the use of $generate.toc parameter, or if
       generating a source toc is turned off -->
  <xsl:if test="not(contains($toc.params, 'toc')) and
                ($process.source.toc != 0 or $process.empty.source.toc != 0)">
    <!-- Don't generate a page sequence unless there is content -->
    <xsl:variable name="content">
      <xsl:choose>
        <xsl:when test="* and $process.source.toc != 0">
          <xsl:apply-templates />
        </xsl:when>
        <xsl:when test="count(*) = 0 and $process.empty.source.toc != 0">
          <!-- trick to switch context node to parent element -->
          <xsl:for-each select="parent::*">
            <xsl:choose>
              <xsl:when test="self::d:set">
                <xsl:call-template name="set.toc">
                  <xsl:with-param name="toc.title.p" 
                                  select="contains($toc.params, 'title')"/>
                </xsl:call-template>
              </xsl:when>
              <xsl:when test="self::d:book">
                <xsl:call-template name="division.toc">
                  <xsl:with-param name="toc.title.p" 
                                  select="contains($toc.params, 'title')"/>
                </xsl:call-template>
              </xsl:when>
              <xsl:when test="self::d:part">
                <xsl:call-template name="division.toc">
                  <xsl:with-param name="toc.title.p" 
                                  select="contains($toc.params, 'title')"/>
                </xsl:call-template>
              </xsl:when>
            </xsl:choose>
          </xsl:for-each>
        </xsl:when>
      </xsl:choose>
    </xsl:variable>

    <xsl:if test="string-length(normalize-space($content)) != 0">
      <xsl:variable name="lot-master-reference">
        <xsl:call-template name="select.pagemaster">
          <xsl:with-param name="pageclass" select="'lot'"/>
        </xsl:call-template>
      </xsl:variable>
    
      <xsl:call-template name="page.sequence">
        <xsl:with-param name="master-reference"
                        select="$lot-master-reference"/>
        <xsl:with-param name="element" select="'toc'"/>
        <xsl:with-param name="gentext-key" select="'TableofContents'"/>
        <xsl:with-param name="content" select="$content"/>
      </xsl:call-template>
    </xsl:if>
  </xsl:if>
</xsl:template>
  
<xsl:template match="d:chapter/d:toc | d:appendix/d:toc | d:preface/d:toc | d:article/d:toc">
  <xsl:variable name="toc.params">
    <xsl:call-template name="find.path.params">
      <xsl:with-param name="node" select="parent::*"/>
      <xsl:with-param name="table" select="normalize-space($generate.toc)"/>
    </xsl:call-template>
  </xsl:variable>

  <!-- Do not output the toc element if one is already generated
       by the use of $generate.toc parameter, or if
       generating a source toc is turned off -->
  <xsl:if test="not(contains($toc.params, 'toc')) and
                ($process.source.toc != 0 or $process.empty.source.toc != 0)">
    <xsl:choose>
      <xsl:when test="* and $process.source.toc != 0">
        <fo:block>
          <xsl:apply-templates/> 
        </fo:block>
      </xsl:when>
      <xsl:when test="count(*) = 0 and $process.empty.source.toc != 0">
        <!-- trick to switch context node to section element -->
        <xsl:for-each select="parent::*">
          <xsl:call-template name="component.toc">
            <xsl:with-param name="toc.title.p" 
                            select="contains($toc.params, 'title')"/>
          </xsl:call-template>
        </xsl:for-each>
      </xsl:when>
    </xsl:choose>
    <xsl:call-template name="component.toc.separator"/>
  </xsl:if>
</xsl:template>

<xsl:template match="d:section/d:toc
                    |d:sect1/d:toc
                    |d:sect2/d:toc
                    |d:sect3/d:toc
                    |d:sect4/d:toc
                    |d:sect5/d:toc">

  <xsl:variable name="toc.params">
    <xsl:call-template name="find.path.params">
      <xsl:with-param name="node" select="parent::*"/>
      <xsl:with-param name="table" select="normalize-space($generate.toc)"/>
    </xsl:call-template>
  </xsl:variable>

  <!-- Do not output the toc element if one is already generated
       by the use of $generate.toc parameter, or if
       generating a source toc is turned off -->
  <xsl:if test="not(contains($toc.params, 'toc')) and
                ($process.source.toc != 0 or $process.empty.source.toc != 0)">
    <xsl:choose>
      <xsl:when test="* and $process.source.toc != 0">
        <fo:block>
          <xsl:apply-templates/> 
        </fo:block>
      </xsl:when>
      <xsl:when test="count(*) = 0 and $process.empty.source.toc != 0">
        <!-- trick to switch context node to section element -->
        <xsl:for-each select="parent::*">
          <xsl:call-template name="section.toc">
            <xsl:with-param name="toc.title.p" 
                            select="contains($toc.params, 'title')"/>
          </xsl:call-template>
        </xsl:for-each>
      </xsl:when>
    </xsl:choose>
    <xsl:call-template name="section.toc.separator"/>
  </xsl:if>
</xsl:template>

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

<xsl:template match="d:tocpart|d:tocchap
                     |d:toclevel1|d:toclevel2|d:toclevel3|d:toclevel4|d:toclevel5">
  <xsl:apply-templates select="d:tocentry"/>
  <xsl:if test="d:tocchap|d:toclevel1|d:toclevel2|d:toclevel3|d:toclevel4|d:toclevel5">
    <fo:block start-indent="{count(ancestor::*)*2}pc">
      <xsl:apply-templates select="d:tocchap|d:toclevel1|d:toclevel2|d:toclevel3|d:toclevel4|d:toclevel5"/>
    </fo:block>
  </xsl:if>
</xsl:template>

<xsl:template match="d:tocentry|d:lotentry|d:tocdiv|d:tocfront|d:tocback">
  <fo:block end-indent="2pc"
            last-line-end-indent="-2pc">
    <xsl:if test="@linkend or @pagenum">
      <xsl:attribute name="text-align-last">justify</xsl:attribute>
    </xsl:if>
    <fo:inline keep-with-next.within-line="always">
      <xsl:choose>
        <xsl:when test="@linkend">
          <fo:basic-link internal-destination="{@linkend}">
            <xsl:apply-templates/>
          </fo:basic-link>
        </xsl:when>
        <xsl:otherwise>
          <xsl:apply-templates/>
        </xsl:otherwise>
      </xsl:choose>
    </fo:inline>

    <xsl:choose>
      <xsl:when test="@linkend">
        <fo:inline keep-together.within-line="always">
          <fo:leader xsl:use-attribute-sets="toc.leader.properties"/>
          <fo:basic-link internal-destination="{@linkend}">
            <xsl:choose>
              <xsl:when test="@pagenum">
                <xsl:value-of select="@pagenum"/>
              </xsl:when>
              <xsl:otherwise>
                <fo:page-number-citation ref-id="{@linkend}"/>
              </xsl:otherwise>
            </xsl:choose>
          </fo:basic-link>
        </fo:inline>
      </xsl:when>
      <xsl:when test="@pagenum">
        <fo:inline keep-together.within-line="always">
          <fo:leader xsl:use-attribute-sets="toc.leader.properties"/>
          <xsl:value-of select="@pagenum"/>
        </fo:inline>
      </xsl:when>
    </xsl:choose>
  </fo:block>
</xsl:template>

<xsl:template match="d:toc/d:title | d:tocdiv/d:title">
  <fo:block font-weight="bold">
    <xsl:apply-templates/>
  </fo:block>
</xsl:template>

<xsl:template match="d:toc/d:subtitle | d:tocdiv/d:subtitle">
  <fo:block font-weight="bold">
    <xsl:apply-templates/>
  </fo:block>
</xsl:template>

<xsl:template match="d:toc/d:titleabbrev |d:tocdiv/d:titleabbrev">
</xsl:template>

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

<!-- A lot element must have content, because there is no attribute
     to select what kind of list should be generated -->
<xsl:template match="d:book/d:lot | d:part/d:lot">
  <!-- Don't generate a page sequence unless there is content -->
  <xsl:variable name="content">
    <xsl:choose>
      <xsl:when test="* and $process.source.toc != 0">
        <xsl:apply-templates />
      </xsl:when>
      <xsl:when test="not(child::*) and $process.empty.source.toc != 0">
        <xsl:call-template name="process.empty.lot"/>
      </xsl:when>
    </xsl:choose>
  </xsl:variable>

  <xsl:if test="string-length(normalize-space($content)) != 0">
    <xsl:variable name="lot-master-reference">
      <xsl:call-template name="select.pagemaster">
        <xsl:with-param name="pageclass" select="'lot'"/>
      </xsl:call-template>
    </xsl:variable>
  
    <xsl:call-template name="page.sequence">
      <xsl:with-param name="master-reference"
                      select="$lot-master-reference"/>
      <xsl:with-param name="element" select="'toc'"/>
      <xsl:with-param name="content" select="$content"/>
    </xsl:call-template>
  </xsl:if>
</xsl:template>
  
<xsl:template match="d:chapter/d:lot | d:appendix/d:lot | d:preface/d:lot | d:article/d:lot">
  <xsl:choose>
    <xsl:when test="* and $process.source.toc != 0">
      <fo:block>
        <xsl:apply-templates/> 
      </fo:block>
      <xsl:call-template name="component.toc.separator"/>
    </xsl:when>
    <xsl:when test="not(child::*) and $process.empty.source.toc != 0">
      <xsl:call-template name="process.empty.lot"/>
    </xsl:when>
  </xsl:choose>
</xsl:template>

<xsl:template match="d:section/d:lot
                    |d:sect1/d:lot
                    |d:sect2/d:lot
                    |d:sect3/d:lot
                    |d:sect4/d:lot
                    |d:sect5/d:lot">
  <xsl:choose>
    <xsl:when test="* and $process.source.toc != 0">
      <fo:block>
        <xsl:apply-templates/> 
      </fo:block>
      <xsl:call-template name="section.toc.separator"/>
    </xsl:when>
    <xsl:when test="not(child::*) and $process.empty.source.toc != 0">
      <xsl:call-template name="process.empty.lot"/>
    </xsl:when>
  </xsl:choose>
</xsl:template>

<xsl:template name="process.empty.lot">
  <!-- An empty lot element does not provide any information to indicate
       what should be included in it.  You can customize this
       template to generate a lot based on @role or something -->
  <xsl:message>
    <xsl:text>Warning: don't know what to generate for </xsl:text>
    <xsl:text>lot that has no children.</xsl:text>
  </xsl:message>
</xsl:template>

<xsl:template match="d:lot/d:title">
  <fo:block font-weight="bold">
    <xsl:apply-templates/>
  </fo:block>
</xsl:template>

<xsl:template match="d:lot/d:subtitle">
  <fo:block font-weight="bold">
    <xsl:apply-templates/>
  </fo:block>
</xsl:template>

<xsl:template match="d:lot/d:titleabbrev">
</xsl:template>

</xsl:stylesheet>
