Re: [docbook-apps] Page X of Y in user.footer.navigation

[Diane Larin <diane@inro.ca>]

Thanks a lot! This is exactly what I needed.

Diane Larin
INRO

------------- Begin Included Message -------------

Well, I never know how much information to give because list 
participants
have a wide range of experience with XSL.  8^)

Here is a sample customization of 'user.footer.content'.   The first 
three
variables are global (not inside a template), so they are computed once 
when
the stylesheet starts.

<!-- Create the chunk hierarchy -->
<xsl:variable name="mychunk.hierarchy">
  <xsl:if test="function-available('exsl:node-set')">
    <xsl:message>Computing chunks...</xsl:message>
    <xsl:apply-templates select="/*" mode="find.chunks"/>
  </xsl:if>
</xsl:variable>

<!-- Turn the chunk hierarchy into a node-set -->
<xsl:variable name="mychunks"
select="exsl:node-set($mychunk.hierarchy)//div"/>

<!-- Get the total number of chunks -->
<xsl:variable name="chunk.total" select="count($mychunks)"/>

<!-- Add a line to the footer -->
<xsl:template name="user.footer.content">

  <!-- Get the id of the current chunk -->
  <xsl:variable name="genid" select="generate-id()"/>

  <!-- Get the position of the current chunk.
       You have to switch contexts using xsl:for-each to
       get the position within the node-set. -->
  <xsl:variable name="X">
    <xsl:for-each select="$mychunks">
      <xsl:if test="@id = $genid">
        <xsl:value-of select="position()"/>
      </xsl:if>
    </xsl:for-each>
  </xsl:variable>

  <!-- Output the numbers -->
 <div class="nodecount">
    <xsl:text>Node </xsl:text>
    <xsl:value-of select="$X"/>
    <xsl:text> of </xsl:text>
    <xsl:value-of select="$chunk.total"/>
  </div>

</xsl:template>

I originally thought iterating over all the chunks using xsl:for-each 
would
slow things down, since it is done for each chunk.  But my tests show it
doesn't affect processing time much, even for a 400 chunk document.

Bob Stayton
Sagehill Enterprises
DocBook Consulting
bobs@sagehill.net
------------- End Included Message -------------