On 17/12/2018 11:18, Jirka Kosek wrote:
> On 17.12.2018 9:11, Norman Walsh wrote:
>>> 4. Is it possible to do source code highlighting in docbook?
>>
>> In the browser, yes. I don’t think there’s a solution for doing it
>> in print at the moment.
>
> XSLTH library (https://sourceforge.net/projects/xslthl/) used by
> XSLT 1.0 stylesheets has Saxon9 connector, so in theory it can be
> integrated into XSLT 2.0 styleshets as well.
Easily more than just a theory. I used the XSLTHL library and an XSLT
2.0 stylesheet to add highlighting (to HTML) in the current version of
'Introduction to CSS for Paged Media' available at
https://www.antennahouse.com/css/.The significant parts of the stylesheet (based on the XSLTHL example) are:
----------------------------------------------
<xsl:stylesheet
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="2.0"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:sbhl="http://net.sf.xslthl/ConnectorSaxonB"
xmlns:saxonb="http://saxon.sf.net/"
xmlns:xslthl="http://xslthl.sf.net"
xmlns:xhtml="http://www.w3.org/1999/xhtml"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
extension-element-prefixes="sbhl xslthl"
exclude-result-prefixes="saxonb sbhl xhtml xs xslthl">
<xsl:param name="xslthl.config" />
<saxonb:script implements-prefix="sbhl" language="java"
src="java:net.sf.xslthl.ConnectorSaxonB" />
<xsl:template match="xhtml:code[@class] | xhtml:pre[@class]">
<xsl:element name="{local-name()}">
<xsl:copy-of select="@*" />
<xsl:call-template name="syntax-highlight">
<xsl:with-param name="language"
select="tokenize(normalize-space(@class),
' ')[last()]"
as="xs:string"
tunnel="yes" />
<xsl:with-param name="source" select="." />
</xsl:call-template>
</xsl:element>
</xsl:template>
<xsl:template match="xslthl:*" mode="hl">
<xsl:apply-templates select="node()" />
</xsl:template>
<xsl:template name="syntax-highlight">
<xsl:param name="language" as="xs:string" tunnel="yes" />
<xsl:param name="source" />
<xsl:choose>
<xsl:when test="function-available('sbhl:highlight')">
<xsl:variable name="highlighted"
select="sbhl:highlight($language, $source,
$xslthl.config)" />
<xsl:apply-templates select="$highlighted" mode="hl" />
</xsl:when>
<xsl:otherwise>
style="border: 2px solid red; background: white; font-family:
sans-serif; padding: 0.5em; font-size: 2em;"
>No syntax highlighter available
<xsl:apply-templates select="$source/* | $source/text()" />
</xsl:otherwise>
</xsl:choose>
</xsl:template>
----------------------------------------------
I use Ant to run nearly everything, so if you want to reconstruct the
usage, this is the Ant command line:
ant -lib xslthl-2.1.3.jar -lib saxon9.jar -emacs toc-hl.single
where the 'toc-hl.single' target uses the <xslt> target to run Saxon and
on the stylesheet and pass in the XSLTHL configuration file as a
parameter.
I hope that helps.
Regards,
Tony Graham.
--
Senior Architect
XML Division
Antenna House, Inc.
----
Skerries, Ireland
tgraham@antenna.co.jp