Re: [xsl] Revision Marking in HTML

[David Carlisle <davidc@xxxxxxxxx>]

this is essentially a grouping problem: you want to group all nodes
between matching Pis together, and any of the standard XSLT1 grouping
techniques can be used.

I can't tell from your posting whether it's a hard or an easy problem


In particular, where can the processing instructions appear.

If I insert some text that starts in one element and finishes in another
do I edn up with

<para> fooo <?xm-insertion_mark_start ?> bar</para>
<para> more bar <?xm-insertion_mark_end ?> more foo>/para>

If so, your problem is "interesting".

If the PIs always appear in pairs that are well balanced with respect to
the element nesting, the problem is a lot less "interesting" but a lot
more feasible to supply a completely general solution.

I'll assume the latter, and offer the standard key based grouping
method:

<xsl:key name="p" match="node()" use="generate-id(preceding-sibling::processing-instruction('xm-insertion_mark_start'))"/>


then whenever you would have use apply-templates, use

<xsl:choose>
<xsl:when test="text()[normalize-space()] and processing-instruction('xm-insertion_mark_start')">
<xsl:apply-templates
select="processing-instruction('xm-insertion_mark_start')[1]/preceding-sibling::node()"/>
<xsl:for-each
select="processing-instruction('xm-insertion_mark_start')">
<span class="revcontrol>
<xsl:apply-templates select="key('p',generate-id())"/>
</span>
</xsl:for-each>
</xsl:when>
<xsl:when test="processing-instruction('xm-insertion_mark_start')">
<xsl:apply-templates
select="processing-instruction('xm-insertion_mark_start')[1]/preceding-sibling::node()"/>
<xsl:for-each
select="processing-instruction('xm-insertion_mark_start')">
<div class="revcontrol>
<xsl:apply-templates select="key('p',generate-id())"/>
</div>
</xsl:for-each>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates/>
</xsl:otherwise>
</xsl:choose>

David (untested)


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