Subject: RE: [xsl] tokenize() for text wrap From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Thu, 10 Feb 2005 17:25:55 -0000 |
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.
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