Re: String match within block of text

Hei Jarno,

The big trouble with this template is that it works through the text
one character at a time. So rather than using substring(..., 1,
1)/substring(..., 2) to recurse through the string, it's usually
better to use substring-before() and substring-after().

Thus the 'linker' template could instead be:

<xsl:template name="linker">
   <xsl:param name="text" select="." />
   <xsl:variable name="match" select="$specie[contains($text, .)][1]" />
   <xsl:choose>
      <xsl:when test="$match">
         <xsl:call-template name="linker">
            <xsl:with-param name="text"
                            select="substring-before($text, $match)" />
         </xsl:call-template>
         <font color="#008000">
            <i>
               <a href="{$match/@href}">
                  <xsl:value-of select="$match" />
               </a>
            </i>
         </font>
         <xsl:call-template name="linker">
            <xsl:with-param name="text"
                            select="substring-after($text, $match)" />
         </xsl:call-template>
      </xsl:when>
      <xsl:otherwise><xsl:value-of select="$text" /></xsl:otherwise>
   </xsl:choose>
</xsl:template>

The big problem with this solution is that I'm recursing in two
places, so I can't take advantage of any tail-end recursion
optimisation that the XSLT processor might do. However, it'll still
probably be more efficient unless there are *lots* of Specie elements
whose values are held in the Synonyms text.

Cheers,

Jeni (Beethoven: Ode to Joy)

---
Jeni Tennison
http://www.jenitennison.com/



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