Re: [xsl] Positional grouping problem

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2013-02-01 13:40 -0500, Mark Peters wrote:
> I've trying to group certain nodes in a flat MediaWiki ML file to
> allow readers to show and hide the content. The grouping is based on
> font sizes declared in a @style attribute, which have a uniform
> structure across all content files.
>
> Essentially, I'm trying to group each <div/> node where the @style
> contains "14pt" with its following siblings. Some of the siblings have
> other font sizes smaller than 14pt; others have no declared font sizes
> because they wrap other nodes, such as tables.

You were really close.

What you weren't checking is that when the group does not match the 
grouping criteria for group-starting-with, then you are in the 
content before the first group.

I hope the solution below helps ... if I haven't missed seeing 
anything then the output matches what you said you wanted.

. . . . . . . . Ken


T:\ftemp>type mark.xml
<?xml version="1.0" encoding="UTF-8"?>
<div style="margin-bottom: 15pt; margin-left: 20pt;"
xmlns="http://www.w3.org/1999/xhtml";>
    <div style="blah" />
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-size: 17pt;">
        <span>Page Title</span>
    </div>
    <hr />
    <div style="font-size: 14pt;">
        <span>Title</span>
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="margin-left: 5pt;">
        <table />
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-size: 14pt;">
        <span>Title</span>
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
    <div style="margin-left: 5pt;">
        <table />
    </div>
</div>

T:\ftemp>call xslt2 mark.xml mark.xsl
<div xmlns="http://www.w3.org/1999/xhtml";
     style="margin-bottom: 15pt; margin-left: 20pt;">
   <div style="blah"/>
   <div style="font-family: sans-serif; font-size: 10pt;">
        <span>Text</span>
    </div>
   <div style="font-size: 17pt;">
        <span>Page Title</span>
    </div>
   <hr/>
   <div class="NavFrame">
      <div class="NavHead">Title</div>
      <div class="NavContent">
         <div style="font-family: sans-serif; font-size: 10pt;">
            <span>Text</span>
         </div>
         <div style="margin-left: 5pt;">
            <table/>
         </div>
         <div style="font-family: sans-serif; font-size: 10pt;">
            <span>Text</span>
         </div>
      </div>
   </div>
   <div class="NavFrame">
      <div class="NavHead">Title</div>
      <div class="NavContent">
         <div style="font-family: sans-serif; font-size: 10pt;">
            <span>Text</span>
         </div>
         <div style="font-family: sans-serif; font-size: 10pt;">
            <span>Text</span>
         </div>
         <div style="margin-left: 5pt;">
            <table/>
         </div>
      </div>
   </div>
</div>

T:\ftemp>type mark.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
  xmlns:html="http://www.w3.org/1999/xhtml";
  xmlns="http://www.w3.org/1999/xhtml";
  exclude-result-prefixes="html"
  version="2.0">

<xsl:output indent="yes" omit-xml-declaration="yes"/>

<xsl:template match="html:div">
  <xsl:copy>
    <xsl:copy-of select="@*"/>
    <xsl:for-each-group select="*"
           group-starting-with="html:div[contains(@style,'14pt')]">
      <xsl:choose>
        <xsl:when test="self::html:div[contains(@style,'14pt')]">
          <!--found a group-->
          <div class="NavFrame">
            <div class="NavHead">
              <xsl:copy-of select="html:span/node()"/>
            </div>
            <div class="NavContent">
              <xsl:copy-of select="current-group()[position()>1]"/>
            </div>
          </div>
        </xsl:when>
        <xsl:otherwise>
          <!--this is the pre-amble before the first group-->
          <xsl:copy-of select="current-group()"/>
        </xsl:otherwise>
      </xsl:choose>
    </xsl:for-each-group>
  </xsl:copy>
</xsl:template>

</xsl:stylesheet>
T:\ftemp>rem Done!


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