If (like me) you find xsl:iterate easier to get right than recursive functions,
then you could do something like
<xsl:iterate select="tokenize($input)">
<xsl:param name="line-length" select="0"/>
<xsl:choose>
<xsl:when test="$line-length gt 35">
<break/>
<xsl:value-of select=". || ' '"/>
<xsl:next-iteration>
<xsl:with-param name="line-length" select="string-length(.) + 1"/>
</xsl:next-iteration>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select=". || ' '"/>
<xsl:next-iteration>
<xsl:with-param name="line-length" select="$line-length +
string-length(.) + 1"/>
</xsl:next-iteration>
</xsl:otherwise>
</xsl:choose>
</xsl:iterate>
Note that a solution using tokenize loses the original separators; if you want
to retain separators such as multiple spaces or tabs then you'll need to use
analyse-string instead.
There are probably more concise/elegant solutions using higher-order functions
and folding, but this one seems easy to read and understand.
Michael Kay
Saxonica
On 3 May 2020, at 01:45, Rick Quatro rick(_at_)rickquatro(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Hi All,
I have lines in my input that I want to add <break> elements to in my output.
For example, this might be the input:
<xsl:param name="line" select="'Takeoff from Unlisted and Alternate
Airports'"/>
and I want to replace a space with a <break> so that each line doesn't
exceed, for example, 35 characters
<line>Takeoff from Unlisted and Alternate<break/>Airports</line>
I am thinking the I can tokenize the line and then recursively build the
string back up from the beginning, checking its length. Any other suggestions
on a general-purpose algorithm that I can use in XSLT 3 would be appreciated.
Thanks in advance.
Rick
Rick Quatro
Carmen Publishing Inc.
rick(_at_)frameexpert(_dot_)com <mailto:rick(_at_)frameexpert(_dot_)com>
585-729-6746
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