add a value in each iteration

chameleon · August 29th, 2009, 12:38 PM

the XML (part)
--------------------
<ruler>
<point rel="0"/>
<point rel="100"/>
<point rel="45"/>
......
</ruler>
--------------------
the XSLT (part)
--------------------
<xsl:for-each select="point">
<xsl:value-of select="????????"/><br/>
</xsl:for-each>
--------------------
How can I write the XSLT above to get these results?
Basically I want to get absolute positions from relative positions.
results
--------------------
0
100
145
......
--------------------

mhkay · August 29th, 2009, 12:46 PM

You could use

Code:

select="sum(@rel | preceding-sibling::point/@ref)"

but that's not going to perform well if the number of points is large.

A better solution is to use recursion:

Code:

<xsl:template match="ruler">
  <xsl:apply-templates select="point[1]">
     <xsl:with-param name="total" select="0"/>
  </xsl:apply-templates>
</xsl:template>

<xsl:template match="point">
  <xsl:param name="total"/>
  <xsl:value-of select="$total + @rel"/><br/>
  <xsl:apply-templates select="following-sibling::point[1]">
     <xsl:with-param name="total" select="$total + @rel"/>
  </xsl:apply-templates>
</xsl:template>

chameleon · August 29th, 2009, 02:19 PM

you are the coolest man on planet...