OK, I think I found the culprit for the strange behavior with
IMG-elements.
The Problem:
After fixing the problem of id-attributes not being passed
through to the final HTML I notices a strange behaviour with
IMG-elements:
- If an IMG-element had no id-attribute everything worked fine. IMG
was processed as expected.
- If it had an id-attribute however strange things happended, the
IMG-element was renderered like this
<img alt="Icon"><a name="icon"></a> which obviously made it pretty
useless.
Analysis:
Going down the pipeline I found the culprit in pelts document2html
where img is processed as part of this default template:
1 <xsl:template match="node()|@*" priority="-1">
2 <xsl:copy>
3 <xsl:apply-templates select="@*"/>
4 <xsl:apply-templates/>
5 </xsl:copy>
6 </xsl:template>
Debugging this I found line 3 starting to copy the IMG-element then
trying to execute the following template
<!-- Generate a <a name="..."> tag for an @id -->
<xsl:template match="@id">
<xsl:if test="normalize-space(.)!=''">
<a name="{.}"/>
</xsl:if>
</xsl:template>
which tries to insert a a-element right into our open img-element,
triggering an error and aborting the processing (which explains the
strange result).
Attempted Solution:
1 <xsl:template match="node()|@*" priority="-1">
<!-- id processing will create its own a-element so processing has to
happen outside the copied element
-->
2 <xsl:apply-templates select="@id"/>
3 <xsl:copy>
4 <xsl:apply-templates select="@* and ???"/>
5 <xsl:attribute name="id">{id}</xsl:attribute>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
Line 2 will only process ids and insert the a-element before the
img-tag as usual (question: does it make sense to have this
id-processing here AND in several templates that I saw in
common? That seems to invite redundant processing?)
Line 4 should now exclude @id but I'm not sure how to express that in
X-Path if I want to process all attributes but id? Can someone
pls help?
Line 5 inserts the unprocessed id-attribute for use in css-styling.
So wdyt?
--
Ferdinand Soethe
