Subject: Re: [xsl] [Accumulators] Another stupid question From: "Imsieke, Gerrit, le-tex gerrit.imsieke@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 6 Oct 2020 21:20:29 -0000 |
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" B xmlns:xs="http://www.w3.org/2001/XMLSchema" B xmlns:private="top:marchand" B exclude-result-prefixes="#all" B version="3.0">
B <xsl:output method="xml" indent="true"/>
B <xsl:mode on-no-match="shallow-copy" use-accumulators="#all"/>
B <xsl:accumulator name="blockHeight" as="xs:double" initial-value="0.0"> B B B <xsl:accumulator-rule match="page"> B B B B B <xsl:message>Reset block height to 3.2</xsl:message> B B B B B <xsl:sequence select="3.2"/> B B B </xsl:accumulator-rule> B B B <xsl:accumulator-rule match="private:block"> B B B B B <xsl:message>Adding block height {@id} : {@height}</xsl:message> B B B B B <xsl:sequence select="$value + xs:double(@height)"/> B B B </xsl:accumulator-rule> B </xsl:accumulator>
B <xsl:template match="block"> B B B <xsl:variable name="height" as="xs:double" select="3.5"/> B B B <!-- produce some output --> B B B <xsl:variable name="TempTree" as="element(private:block)"> B B B B B <private:block height="{$height}"/> B B B </xsl:variable> B B B <xsl:apply-templates select="$TempTree"/> B B B <xsl:copy> B B B B B <xsl:attribute name="y" select="accumulator-after('blockHeight')"/> B B B B B <xsl:apply-templates select="node() | @*"/> B B B </xsl:copy> B </xsl:template>
B <xsl:template match="private:block"> B B B <xsl:message>private:block matched</xsl:message> B </xsl:template>
B <xsl:template name="xsl:initial-template"> B B B <xsl:variable name="content" as="document-node()"> B B B B B <xsl:document> B B B B B B B <doc> B B B B B B B B B <page id="p1"> B B B B B B B B B B B <block id="b1"> B B B B B B B B B B B B B <!-- arbitrary content --> B B B B B B B B B B B </block> B B B B B B B B B B B <block id="b2"> B B B B B B B B B B B B B <!-- another arbitrary content --> B B B B B B B B B B B </block> B B B B B B B B B </page> B B B B B B B B B <page id="p2"> B B B B B B B B B B B <block id="b3"> B B B B B B B B B B B B B <!-- arbitrary content --> B B B B B B B B B B B </block> B B B B B B B B B B B <block id="b4"> B B B B B B B B B B B B B <!-- another arbitrary content --> B B B B B B B B B B B </block> B B B B B B B B B </page> B B B B B B B </doc> B B B B B </xsl:document> B B B </xsl:variable> B B B <xsl:apply-templates select="$content"/> B </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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