RE: [xsl] tokenize() for text wrap

["Michael Kay" <mike@xxxxxxxxxxxx>]

Try

regex="{$regex}"

Michael Kay
http://www.saxonica.com/
 

> -----Original Message-----
> From: Richard Lewis [mailto:richardlewis@xxxxxxxxxxxxxx] 
> Sent: 10 February 2005 17:13
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] tokenize() for text wrap
> 
> 
> On Thu, 10 Feb 2005 16:39:58 +0000, "Richard Lewis"
> <richardlewis@xxxxxxxxxxxxxx> said:
> > 
> > On Thu, 10 Feb 2005 16:08:34 -0000, "Michael Kay" 
> <mike@xxxxxxxxxxxx>
> > said:
> > > The regex in tokenize() is a regular expression that the 
> separator must
> > > match. There's no way of constraining the tokens, only 
> the separator.
> > > 
> > > .{30,} matches any string of 30 characters or more, but 
> .{30,}? also
> > > matches
> > > a zero-length string. I'm not sure what this would 
> achieve even if it
> > > worked!
> > > 
> > If you test this with sed you'll need a regex like this:
> > 
> > echo "string..." | sed "s/\(.\{,30\}\) /\1\n/g"
> > 
> > But if you check the wierd regex syntax for XPath:
> > http://www.w3.org/TR/xpath-functions/#regex-syntax
> > 
> > it says "X{n,}? matches X, at least n times". Bizarre, isn't it?
> > 
> > > I think you can use xsl:analyze-string for this. Use a 
> regex that matches
> > > the required token together with the following separator; 
> treat these as
> > > two
> > > subgroups by parenthesizing the regex, and in the 
> xsl:matching-substring
> > > child, pick up the token value as regex-group(1).
> > > 
> > OK, I've tried this but I can't work out the right regex. 
> I've tried:
> > (.{30,}?\s+)(\s+)
> > (.{30,}\s+)(\s+)
> > .{30,}\s+
> > .{30,}?\s+
> > 
> > and they all produce no matches.
> > 
> I've got this:
> 
> <xsl:variable name="regex">(.{30,}?)\s+</xsl:variable>
> 
> <xsl:analyze-string select="normalize-space($text)" regex="$regex"
> flags="s">
>     <xsl:matching-substring>
>         <tspan dy="{...}">
>             <xsl:value-of select="regex-group(1)" />
>         </tspan>
>     </xsl:matching-substring>
> </xsl:analyze-string>
> 
> but there don't seem to be any matching-substrings (or
> non-matching-substrings), I get no tspan elements in the result tree.
> 
> Richard.