RE: [xsl] tokenize() for text wrap

Subject: RE: [xsl] tokenize() for text wrap
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Thu, 10 Feb 2005 16:08:34 -0000
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

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).

Michael Kay  

> -----Original Message-----
> From: Richard Lewis [mailto:richardlewis@xxxxxxxxxxxxxx] 
> Sent: 10 February 2005 15:50
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] tokenize() for text wrap
> Hello XSL list,
> I'm just trying an idea for text wrapping when transforming 
> XML to SVG.
> Inside a named template to which a long string of non-marked up text
> ($text) and some other bits and pieces is passed I have the following
> for-each:
> <xsl:for-each select="tokenize($text, '.{30,}?\s+')">
>     <tspan dy="{...}">
>         <xsl:value-of select="." />
>     </tspan>
> </xsl:for-each>
> The idea is that it splits the $text string up at the first 
> space after
> 30 characters (this number is actually a variable in the real 
> thing) and
> then formats each token as a tspan element. The output, however,
> contains the correct number of tspan elements (which also have the
> correct 'dy' attributes) but all but the last one is empty. 
> (I think the
> text in the last one is the correct, though).
> (I'm working with Saxon 8.2B; I've tried different combinations of
> $flags for the tokenize() function but the result is always the same)
> Any ideas what might be wrong with it?
> Cheers,
> Richard

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