Re: [xsl] Line break algorithm

Subject: Re: [xsl] Line break algorithm
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 3 May 2020 09:26:44 -0000
If (like me) you find xsl:iterate easier to get right than recursive
functions, then you could do something like

<xsl:iterate select="tokenize($input)">
  <xsl:param name="line-length" select="0"/>
     <xsl:when test="$line-length gt 35">
        <xsl:value-of select=". || ' '"/>
           <xsl:with-param name="line-length" select="string-length(.) + 1"/>
        <xsl:value-of select=". || ' '"/>
           <xsl:with-param name="line-length" select="$line-length +
string-length(.) + 1"/>

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

> On 3 May 2020, at 01:45, Rick Quatro rick@xxxxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> 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
> 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@xxxxxxxxxxxxxxx <mailto:rick@xxxxxxxxxxxxxxx>
> 585-729-6746
> <>
> XSL-List info and archive <>
> EasyUnsubscribe <> (by
email <>)

Current Thread