RE: Extending Xhtml2fo.xsl to handle CLASS attributes

I've begun work on handling the CLASS attributes a *slightly* better way
than I described in my previous note:


<xsl:stylesheet
	version="1.0"
	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
	xmlns:css="http://www.csl.com/css"
	exclude-result-prefixes="css">

<css:stylesheet>

	<rule selector="span.note">font-weight: bold;</rule>
	<rule selector="span.normal">font-weight: normal;</rule>

</css:stylesheet>

.
.
.

<xsl:template name="process-class">

	<xsl:param name="element"/>
	<xsl:param name="class"/>

	<xsl:variable name="selector">
		<xsl:choose>
			<xsl:when test="$class">
				<xsl:value-of select="concat($element, '.',
$class)" />
			</xsl:when>

			<xsl:otherwise>
				<xsl:value-of select="$element" />
			</xsl:otherwise>
		</xsl:choose>

	</xsl:variable>

	<xsl:variable name="rule"
select="document('')/xsl:stylesheet/css:stylesheet/rule[@selector =
$selector]" />

	<xsl:if test="$rule">
		<xsl:attribute name="style"><xsl:value-of select="$rule"
/></xsl:attribute>
	</xsl:if>

</xsl:template>



(The code above is in the XSL stylesheet that I use prior to Xhtml2fo.xsl.)

The process-class template replaces:

<p><span class="note">Programmers:</span> Do this.</p>

with

<p><span class="note" style="font-weight: bold;">Programmers:</span> Do
this.</p>


Some limitations:

- Only one selector per rule: I'd like to be able to specify something like
selector="span.note, span.object, span.name", so the same attributes can
apply to many classes, as they do in a CSS file.

- The rules don't cascade (I'm less upset about this).

- This syntax doesn't yet handle "behaviors" (although I'm thinking that I
could add a "template" attribute to the <rule> tag, that I could use in the
process-class template to call a named template that would do the necessary
processing).

I'd welcome advice on any of this.

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