Re: [xsl] [Accumulators] Another stupid question

Ok, thanks a lot, Martin and Gerrit. So I must use a two pass strategy 
if I'm not able to directly calculate widht on content.
Not a good news, but, thanks to you, I now know how to solve my problem !

Best regards,
Christophe

Le 06/10/2020 à 23:20, Imsieke, Gerrit, le-tex gerrit(_dot_)imsieke(_at_)le-tex(_dot_)de 
a écrit :
> The private:block elements are trees of their own and they have their 
> own accumulator values (that are available in the template that 
> matches private:block). But they don't add to the 'blockHeight' 
> accumulator of the main document.
> On 06.10.2020 22:57, Christophe Marchand cmarchand(_at_)oxiane(_dot_)com wrote:
> > Hello !
> >
> > I have another question with accumulators. I use accumulators to 
> > calculate block height, and then to calculate block locations (y).
> > I have this XSL for a repro...
> >
> > <?xml version="1.0" encoding="UTF-8"?>
> > <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
> >    xmlns:xs="http://www.w3.org/2001/XMLSchema";
> >    xmlns:private="top:marchand"
> >    exclude-result-prefixes="#all"
> >    version="3.0">
> >
> >    <xsl:output method="xml" indent="true"/>
> >
> >    <xsl:mode on-no-match="shallow-copy" use-accumulators="#all"/>
> >
> >    <xsl:accumulator name="blockHeight" as="xs:double" 
> > initial-value="0.0">
> >      <xsl:accumulator-rule match="page">
> >        <xsl:message>Reset block height to 3.2</xsl:message>
> >        <xsl:sequence select="3.2"/>
> >      </xsl:accumulator-rule>
> >      <xsl:accumulator-rule match="private:block">
> >        <xsl:message>Adding block height {@id} : {@height}</xsl:message>
> >        <xsl:sequence select="$value + xs:double(@height)"/>
> >      </xsl:accumulator-rule>
> >    </xsl:accumulator>
> >
> >    <xsl:template match="block">
> >      <xsl:variable name="height" as="xs:double" select="3.5"/>
> >      <!-- produce some output -->
> >      <xsl:variable name="TempTree" as="element(private:block)">
> >        <private:block height="{$height}"/>
> >      </xsl:variable>
> >      <xsl:apply-templates select="$TempTree"/>
> >      <xsl:copy>
> >        <xsl:attribute name="y" 
> > select="accumulator-after('blockHeight')"/>
> >        <xsl:apply-templates select="node() | @*"/>
> >      </xsl:copy>
> >    </xsl:template>
> >
> >    <xsl:template match="private:block">
> >      <xsl:message>private:block matched</xsl:message>
> >    </xsl:template>
> >
> >    <xsl:template name="xsl:initial-template">
> >      <xsl:variable name="content" as="document-node()">
> >        <xsl:document>
> >          <doc>
> >            <page id="p1">
> >              <block id="b1">
> >                <!-- arbitrary content -->
> >              </block>
> >              <block id="b2">
> >                <!-- another arbitrary content -->
> >              </block>
> >            </page>
> >            <page id="p2">
> >              <block id="b3">
> >                <!-- arbitrary content -->
> >              </block>
> >              <block id="b4">
> >                <!-- another arbitrary content -->
> >              </block>
> >            </page>
> >          </doc>
> >        </xsl:document>
> >      </xsl:variable>
> >      <xsl:apply-templates select="$content"/>
> >    </xsl:template>
> > </xsl:stylesheet>
> >
> > When I run this XSL on the sample XML, I have messages displayed : 
> > "Reset block height to 3.2", "private:block matched", but never the 
> > "Adding block height..."
> > According to specification [1], I expect private:block matches 
> > accumulator rule, and accumulator value being augmented by 
> > block/@height.
> > What am I doing wrong ?
> >
> > Thanks in advance,
> > Christophe
> >
> > [1] : 18.2.2 
> > https://www.w3.org/TR/xslt-30/#applicability-of-accumulators list item 1
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