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Re: performing calculations with variables / params in

Subject: Re: performing calculations with variables / params in FO using certain units (mm, px, etc)
From: "Dimitre Novatchev" <dnovatchev@xxxxxxxxx>
Date: Thu, 30 Oct 2003 21:15:28 +0100
xsl calculations
> If I am specifying those variables as, 300mm and 200mm respectively I
> suppose there will be a problem in trying to subtract them with the
> units present.
> Is there some way to specify a particular UNIT to be used all over so
> that I can specify those values without the units appended (makes
> subtraction easy)?
> Is there a way to have this subtraction performed with the units
> present,  without having to write intensive string parsing functions to
> separate the values & units?

Yes. Below is a transformation, which uses the "transform-and-sum" template
from FXSL:

<xsl:stylesheet version="1.0"
exclude-result-prefixes="xsl func-transform"
   <xsl:import href="transform-and-sum.xsl"/>

   <!-- to be applied on testTransform-and-sum3.xml -->

   <xsl:output method="text"/>


    <xsl:template match="/">
      <xsl:call-template name="transform-and-sum">
        <xsl:with-param name="pFuncTransform"
        <xsl:with-param name="pList" select="//freespace"/>

    <xsl:template match="func-transform:*">
      <xsl:param name="arg" select="0"/>
      <xsl:value-of select="translate($arg, translate($arg, '0123456789',
''), '')"/>


When applied on this source.xml:


the wanted result is produced:

Another solution will consume all digits befor a non-digit is encountered -- 
this will use the "str-take-while" template.


Dimitre Novatchev.
http://fxsl.sourceforge.net/ -- the home of FXSL

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list

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