Subject: RE: [xsl] tokenize() for text wrap From: "Richard Lewis" <richardlewis@xxxxxxxxxxxxxx> Date: Thu, 10 Feb 2005 17:13:14 +0000 |
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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