xsl:variable with fo value

[TAILLEZ Yannick <Ya...@gefco.fr>]

Hi everyone,

I 'm trying to do something like this :
------ Begin ------
<xsl:variable name="first_cumulative_total">
	<fo:retrieve-marker retrieve-class-name="cumulative_total"
retrieve-boundary="page" retrieve-position="first-starting-within-page"/>
</xsl:variable>
<xsl:variable name="last_cumulative_total">
	<fo:retrieve-marker retrieve-class-name="cumulative_total"
retrieve-boundary="page" retrieve-position="last-ending-within-page"/>
</xsl:variable>
<xsl:value-of select="$last_cumulative_total - $first_cumulative_total"/>
------ end ------

But the two variables are empty and retrieve-marker return a correct value.
Does it because fop parse the xslt and after the fo ?
There is a not too complex solution for this problem ?

Thanks,

Yannick Tailliez









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Re: xsl:variable with fo value

["J.Pietschmann" <j3...@yahoo.de>]

TAILLEZ Yannick wrote:
> Hi everyone,
> 
> I 'm trying to do something like this :
> ------ Begin ------
> <xsl:variable name="first_cumulative_total">
> 	<fo:retrieve-marker retrieve-class-name="cumulative_total"
> retrieve-boundary="page" retrieve-position="first-starting-within-page"/>
> </xsl:variable>
> <xsl:variable name="last_cumulative_total">
> 	<fo:retrieve-marker retrieve-class-name="cumulative_total"
> retrieve-boundary="page" retrieve-position="last-ending-within-page"/>
> </xsl:variable>
> <xsl:value-of select="$last_cumulative_total - $first_cumulative_total"/>
> ------ end ------
> 
> But the two variables are empty and retrieve-marker return a correct value.
> Does it because fop parse the xslt and after the fo ?

No. The transformation is run first, generating a FO document. You can
do this explicitely:
  http://xml.apache.org/fop/running.html#check-input
Neither of your variables will have a non-whitespace string value
at transformation time.

> There is a not too complex solution for this problem ?

No.

J.Pietschmann

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RE: variable with fo value

["Andreas L. Delmelle" <a_...@pandora.be>]

> -----Original Message-----
> From: Andreas L. Delmelle [mailto:a_l.delmelle@pandora.be]
> 

Sorry, slight mistake...
<snip />
> If you were to write just:
> <xsl:value-of select="$last_cumulative_total" />
> 

Should be:
<xsl:copy-of ...>

<xsl:value-of ...> won't return anything unless either:
a. the variable is defined using 'select' 
(as in <xsl:variable name="..." select="..." />)
or
b. the variable contains only text, no markup.

Greetz,

Andreas

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RE: variable with fo value

["Andreas L. Delmelle" <a_...@pandora.be>]

> -----Original Message-----
> From: TAILLEZ Yannick [mailto:Yannick.TAILLEZ@gefco.fr]
>
> Hi everyone,
>
> I 'm trying to do something like this :
<snip />

Hi,

IIUC,

>
> But the two variables are empty and retrieve-marker return a
> correct value.

Well... the xsl:variables wouldn't be empty. They would contain all of the
fo:retrieve-marker code you made them contain, but the following expression:

> <xsl:value-of select="$last_cumulative_total - $first_cumulative_total"/>

would try to perform a mathematical operation on two Result Tree Fragments,
and would not work.

> Does it because fop parse the xslt and after the fo ?

Yes --I think. The XSLT code is parsed/applied first (by Xalan). Then FOP
jumps in, and has its way with the resulting FO 'code'.

If you were to write just:
<xsl:value-of select="$last_cumulative_total" />

Then what FOP would get as input, would be:
<fo:retrieve-marker retrieve-class-name="cumulative_total"
                    retrieve-boundary="page"
                    retrieve-position="last-ending-within-page" />

> There is a not too complex solution for this problem ?

Depends... What does the source XML look like?


Greetz,

Andreas


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