RE: [xsl] how to ask analyze-string for only one match?

["Michael Kay" <mike@xxxxxxxxxxxx>]

One way to do this is to write your analyze-string to process all the
matches, put the result in a sequence-valued variable, and select the first
item in that resulting sequence. 

<xsl:variable name="s" as="xs:string*">
  <xsl:analyze-string select="$d-path" 
            regex="((\-?(\.|\d)+)(,| )+(\-?(\.|\d)+)){{1}}">
     <xsl:matching-substring>
       <xsl:sequence select="."/>
     </xsl:matching-substring>
  </xsl:analyze-string>
</xsl:variable>
<xsl:analyze-string select="$s[1]">
regex="((\-?(\.|\d)+)(,| )+(\-?(\.|\d)+)){{1}}">
   <xsl:matching-substring>
            currentX=<xsl:value-of select="regex-group(2)"/>f;
            currentY=<xsl:value-of select="regex-group(5)"/>f;   
</xsl:matching-substring>
</xsl:analyze-string>  

Michael Kay
http://www.saxonica.com/

> -----Original Message-----
> From: Roger I Martin PhD [mailto:hypernexdev@xxxxxxxxxxxxxxx] 
> Sent: 23 January 2006 20:52
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] how to ask analyze-string for only one match?
> 
> I'm transforming svg.  In particular path data noted by the d 
> attribute.
> -----
>   <path d="M 100 100 L 300 100 L 200 300 z"
>         fill="red" stroke="blue" stroke-width="3" />
> ----
> In this example there are 3 matches 100 100, 300 100 and 200 
> 300.  The 
> following gives me all 3 but I want it to stop after the 
> first match.  
> Added a {1} for group 1 but that doesn't stop the rematch 
> from occuring.
> -----
>     <xsl:template name="apply-absolute-point">
>     <xsl:param name="d-path" select="''"/>
>             <xsl:analyze-string select="$d-path" 
> regex="((\-?(\.|\d)+)(,| )+(\-?(\.|\d)+)){{1}}">
>               <xsl:matching-substring>
>           currentX=<xsl:value-of select="regex-group(2)"/>f;
>           currentY=<xsl:value-of select="regex-group(5)"/>f;
>               </xsl:matching-substring>
>             </xsl:analyze-string>
>     </xsl:template>
> ----