Mike Brown wrote:
In particular, my XML has lots of very long comment lines, which I
would like to be wrapped to a sensible line length, and indented
with a hanging indent like this:
<!-- blah blah
blah blah
blah blah -->
[snip]
Nevertheless, it is possible to devise a word-wrapping algorithm in
pure XSLT, with hanging indents, even. It would be very slow and
about 200 lines long, though. We used to use something like this to
generate documentation, but I recently switched us to using an
extension function that uses a Python 1-liner to do most of the
work.
For what it's worth, XSLT 2.0 makes this a whole lot easier with its
regular expression support. For example, you could use:
<xsl:template match="comment()">
<xsl:text><!-- </xsl:text>
<xsl:analyze-string select="normalize-space(.)"
regex=".{{1,69}}(\s|$)">
<xsl:matching-substring>
<xsl:if test="position() != 1"><xsl:text> </xsl:text></xsl:if>
<xsl:value-of select="." />
<xsl:text>
</xsl:text>
</xsl:matching-substring>
</xsl:analyze-string>
<xsl:text> --></xsl:text>
</xsl:template>
[Note the doubling of the {}s in the regex attribute because it's an
attribute value template; that's caught me out twice today!]
You could use something more subtle than normalize-space() to preserve
*some* of the spacing within the comment but not others.
Cheers,
Jeni
---
Jeni Tennison
http://www.jenitennison.com/
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list